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Articles de revues sur le sujet « Mechanized tunneling »

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Auteur : Grafiati
Publié le 14 mars 2023

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1

Wang, Ruohan, Dianqing Li, Elton J. Chen et Yong Liu. « Dynamic prediction of mechanized shield tunneling performance ». Automation in Construction 132 (décembre 2021) : 103958. http://dx.doi.org/10.1016/j.autcon.2021.103958.

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2

Ma, Li, Zi Wei Ding, Xing Xing Wen et Ming Lei Dong. « Study on the Application of the New Rock Drifting Technology in Zhangcun Colliery ». Advanced Materials Research 295-297 (juillet 2011) : 631–35. http://dx.doi.org/10.4028/www.scientific.net/amr.295-297.631.

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Based on the main problems of tunneling technology and equipment configuration in the south side main entry of Zhangcun colliery, the mechanized line, support way and cement injection technique were investigated and reformed to solve the problems, then a new tunneling technology in south side main entry was proposed. The practical application result show that using different forms of mechanized tunneling lines can improve the loading and transportation efficiency of rock drift tunneling, correspondingly, improve tunneling speed of rock roadway; the support way and cement injection technique in new technology has a positive effect, create a condition for shortening the time of supporting on working face and cement injection and improve the tunneling speed greatly; with the new technology, the work efficiency improved from 0.88m/worker to 0.2m/worker, and increased by 227%.The project of two main entry driving will be completed in a year, and the ventilation system will be formed a year and a half in advance. According to the annual per capita salary sixty thousand Yuan, it can save labor costs 6.12 million Yuan. The good technology and economic effectiveness will be obtained.
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3

Konyukhov, D. S. « Analysis of mechanized tunneling parameters to determine the overcutting characteristics ». Gornye nauki i tekhnologii = Mining Science and Technology (Russia) 7, no 1 (12 avril 2022) : 49–56. http://dx.doi.org/10.17073/2500-0632-2022-1-49-56.

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Tunneling in urban conditions requires costly measures, in order to ensure the safety of existing buildings. On average, there are up to 17–20 buildings per 1 km of Moscow Subway Lines under construction. Analysis and comparison of geotechnical monitoring data and results of geotechnical estimations for underground construction using cut-and-cover and tunneling methods in conditions of high-density urban area shows an unsatisfactory correlation between estimated and actual data. This can be described in the following way: insufficient geotechnical survey data; discrepancy between the accepted estimation model and the actual behavior of soil under load; insufficient qualification of the construction workers; and overcutting. The study was aimed at solving the urgent scientific and engineering problem of determining the characteristics of overcutting during mechanized tunnel boring. At the first stage, the investigations were aimed at identifying the key reasons and factors which determine the quantitative parameters of overcutting in urban underground construction by tunneling. These factors include the following: mismatch between the cutting diameter and the outer lining diameter; displacement of the soil mass in front of the face; incomplete grouting of voids beyond the lining; incomplete filling of beyond-shield voids with clay mortar or slow-curing grouting mortar or no filling at all; and human factor (low qualifications of personnel). The overcutting coefficient was determined on the basis of the proposed empirical dependence of its values with regard to the depth of tunneling. The experimental data allowed the depth dependence of the overcutting coefficient for different tunneling depths to be defined, as well as for tunnel diameters from 4 to 10 meters in the case of mechanized tunnel boring machine (TBM) using the earth pressure balanced tunneling method. The practical importance of the studies consists in determining the range of the empirical overcutting coefficient variation from 0.5 % (for TBMs with nominal diameter of 10 m) up to 5 % (for TBMs with nominal diameter of 4 m). The development of organizational measures and justification of process solutions, aimed at ensuring the safety of the existing buildings in conjunction with the scientific and technical support of underground construction has led to a shortening of tunneling time between the Okskaya and Nizhegorodskaya stations of Nekrasovskaya Line of Moscow Subway by about six months. It has also provided savings of about 2.5 billion rubles.
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Luan, Li Jun, Mu Jia Ma, Xin Yue Gu, Jian Feng Qi, Hai Long Xu et Li Ze Yao. « Finite Element Analysis of the Pillar of Serf-Motion Assistanced Powered Support Equipment for Tunneling Machine Based on ANSYS ». Advanced Materials Research 619 (décembre 2012) : 127–30. http://dx.doi.org/10.4028/www.scientific.net/amr.619.127.

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Serf-motion Assistanced Powered Support Equipment for Tunneling Machine is a new underground temporary support equipment .It's using with tunneling machine, whose main aim is to supply temporary support for the heading face, so ensures continuous working of tunneling machine，To ensure continuous operation of the boring machine, To ensure Mechanized operations of the temporary support of machine digging tunnel. Establish the pillar model by using PRO /E, then Import into ANSYS. Doing The stress analysis for the pillar of Serf-motion Assistanced Powered Support Equipment for Tunneling Machine，and then it could verify that Equipment analysis is correct by ANSYS .
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5

Hölter, Raoul, Chenyang Zhao, Elham Mahmoudi, Arash Alimardani Lavasan, Maria Datcheva, Markus König et Tom Schanz. « Optimal measurement design for parameter identification in mechanized tunneling ». Underground Space 3, no 1 (mars 2018) : 34–44. http://dx.doi.org/10.1016/j.undsp.2018.01.004.

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6

Lavasan, Arash Alimardani, Chenyang Zhao et Tom Schanz. « Adaptive Constitutive Soil Modeling Concept in Mechanized Tunneling Simulation ». International Journal of Geomechanics 18, no 9 (septembre 2018) : 04018114. http://dx.doi.org/10.1061/(asce)gm.1943-5622.0001219.

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7

Rahm, Tobias, Markus Scheffer, Markus Thewes, Markus König et Ruben Duhme. « Evaluation of Disturbances in Mechanized Tunneling Using Process Simulation ». Computer-Aided Civil and Infrastructure Engineering 31, no 3 (20 mai 2015) : 176–92. http://dx.doi.org/10.1111/mice.12143.

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8

Ramesh, A., M. Hajihassani et A. Rashiddel. « Ground Movements Prediction in Shield-Driven Tunnels using Gene Expression Programming ». Open Construction & ; Building Technology Journal 14, no 1 (25 septembre 2020) : 286–97. http://dx.doi.org/10.2174/1874836802014010286.

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Introduction: The increase in population and traffic in metropolitan areas has led to the development of underground transportation spaces. Therefore, the estimation of the surface settlement caused by the construction of underground structures should be accurately considered. Several methods have been developed to predict tunneling-induced surface settlement. Among these methods, artificial intelligence-based methods have received much attention in recent years. This paper is aimed to develop a model based on Gene Expression Programming (GEP) algorithm to predict surface settlement induced by mechanized tunneling. Methods: For this purpose, Tehran Metro Line 6 was simulated numerically to investigate the effects of different parameters on the surface settlement, and 85 datasets were prepared from numerical simulations. Subsequently, several GEP models were implemented using the obtained datasets from numerical simulations and finally, a model with 30 chromosomes and 3 genes was selected as the optimum model. Results: A comparison was made between obtained maximum surface settlements by the proposed GEP model and numerical simulation. The results demonstrated that the proposed model could predict surface settlement induced by mechanized tunneling with a high degree of accuracy. Conclusion: Finally, a mathematical equation was derived from the proposed GEP model, which can be easily used for surface settlement prediction.
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9

Miro, S., D. Hartmann et T. Schanz. « Global sensitivity analysis for subsoil parameter estimation in mechanized tunneling ». Computers and Geotechnics 56 (mars 2014) : 80–88. http://dx.doi.org/10.1016/j.compgeo.2013.11.003.

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10

Bui, Hoang-Giang, et Günther Meschke. « A parallelization strategy for hydro-mechanically coupled mechanized tunneling simulations ». Computers and Geotechnics 120 (avril 2020) : 103378. http://dx.doi.org/10.1016/j.compgeo.2019.103378.

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11

Hegemann, Felix, Puviyarrasan Manickam, Karlheinz Lehner, Christian Koch et Markus König. « Hybrid Ground Data Model for Interacting Simulations in Mechanized Tunneling ». Journal of Computing in Civil Engineering 27, no 6 (novembre 2013) : 708–18. http://dx.doi.org/10.1061/(asce)cp.1943-5487.0000291.

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12

Meschke, Günther, Jelena Ninić, Janosch Stascheit et Abdullah Alsahly. « Parallelized computational modeling of pile–soil interactions in mechanized tunneling ». Engineering Structures 47 (février 2013) : 35–44. http://dx.doi.org/10.1016/j.engstruct.2012.07.001.

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13

Afradi, Alireza, Arash Ebrahimabadi et Tahereh Hallajian. « Prediction of the number of consumed disc cutters of tunnel boring machine using intelligent methods ». Mining of Mineral Deposits 15, no 4 (décembre 2021) : 68–74. http://dx.doi.org/10.33271/mining15.04.068.

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Purpose. Disc cutters are the main cutting tools for the Tunnel Boring Machines (TBMs). Prediction of the number of consumed disc cutters of TBMs is one of the most significant factors in the tunneling projects. Choosing the right model for predicting the number of consumed disc cutters in mechanized tunneling projects has been the most important mechanized tunneling topics in recent years. Methods. In this research, the prediction of the number of consumed disc cutters considering machine and ground conditions such as Power (KW), Revolutions per minute (RPM) (Cycle/Min), Thrust per Cutter (KN), Geological Strength Index (GSI) in the Sabzkooh water conveyance tunnel has been conducted by multiple linear regression analysis and multiple nonlinear regression, Gene Expression Programming (GEP) method and Support Vector Machine (SVM) approaches. Findings. Results showed that the number of consumed disc cutters for linear regression method is R2 = 0.95 and RMSE = 0.83, nonlinear regression method is – R2 = 0.95 and RMSE = 0.84, Gene Expression Programming (GEP) method is – R2 = 0.94 and RMSE = 0.95, Support Vector Machine (SVM) method is – R2 = 0.98 and RMSE = 0.45. Originality. During the analyses, in order to evaluate the accuracy and efficiency of predictive models, the coefficient of determination (R2) and root mean square error (RMSE) have been used. Practical implications. Results demonstrated that all four methods are effective and have high accuracy but the method of support vector machine has a special superiority over other methods.
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14

Pourmand, Salim, Hamid Chakeri, Mohammad Sharghi, Masoud Hajialilue Bonab et Yilmaz Ozcelik. « Laboratory Studies on Soil Conditioning of Sand in the Mechanized Tunneling ». Journal of Testing and Evaluation 48, no 5 (21 décembre 2018) : 20170395. http://dx.doi.org/10.1520/jte20170395.

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15

Cheng, Wei Min, Wen Nie, Gang Zhou, Jun Lei Yang, Wen Zhou Du et Xin Hua Zhang. « Numerical Simulation of Eddy Air-Curtain Dust Controlled Flow Field in Hard Rock Mechanized Driving Face ». Applied Mechanics and Materials 214 (novembre 2012) : 440–44. http://dx.doi.org/10.4028/www.scientific.net/amm.214.440.

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The author established the mathematical model of single-phase flow of gas based on the k-ε two-equation model and numerically simulated the eddy air-curtain dust controlled flow field in hard rock mechanized driving face with the help of FLUENT software.The result showed that, after all the pressure ventilation blown out by the radial clearance of mural cylinder, a full-face eddy air-curtain flow field is formed at the roadway section, forming the air-curtain dust controlled flow field that presses the tunneling place equally in front of the driver of roadheader. After the application of the development of new light polymer materials radial cylinder eddy air-curtain dust controlled system was adopted in hard rock mechanized driving face of north conveyor main roadway, reducing the local dust concentration effectively.
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16

Ahmadi, S., S. Moosazadeh, M. Hajihassani, H. Moomivand et M. M. Rajaei. « Reliability, availability and maintainability analysis of the conveyor system in mechanized tunneling ». Measurement 145 (octobre 2019) : 756–64. http://dx.doi.org/10.1016/j.measurement.2019.06.009.

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17

Saadallah, Amal, Alexey Egorov, Ba-Trung Cao, Steffen Freitag, Katharina Morik et Günther Meschke. « Active Learning for Accurate Settlement Prediction Using Numerical Simulations in Mechanized Tunneling ». Procedia CIRP 81 (2019) : 1052–58. http://dx.doi.org/10.1016/j.procir.2019.03.250.

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18

Baghban Golpasand, Mohammad-Reza, Ngoc Anh Do et Daniel Dias. « Impact of pre-existent Qanats on ground settlements due to mechanized tunneling ». Transportation Geotechnics 21 (décembre 2019) : 100262. http://dx.doi.org/10.1016/j.trgeo.2019.100262.

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19

Lamert, Andre, et Wolfgang Friederich. « Full Waveform Inversion for Advance Exploration of Ground Properties in Mechanized Tunneling ». International Journal of Civil Engineering 17, no 1 (17 mai 2018) : 19–32. http://dx.doi.org/10.1007/s40999-018-0319-7.

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20

Alsahly, Abdullah, Janosch Stascheit et Günther Meschke. « Advanced finite element modeling of excavation and advancement processes in mechanized tunneling ». Advances in Engineering Software 100 (octobre 2016) : 198–214. http://dx.doi.org/10.1016/j.advengsoft.2016.07.011.

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21

Ninić, Jelena, Hoang-Giang Bui, Christian Koch et Günther Meschke. « Computationally Efficient Simulation in Urban Mechanized Tunneling Based on Multilevel BIM Models ». Journal of Computing in Civil Engineering 33, no 3 (mai 2019) : 04019007. http://dx.doi.org/10.1061/(asce)cp.1943-5487.0000822.

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22

Lu, Zhong-Liang, Zhen Wei, Ya-Hui Xu et Hong-Li Wang. « Numerical Simulation and Parameter Optimization of the Air Curtain Dust-Collecting System ». Journal of Computational and Theoretical Nanoscience 13, no 10 (1 octobre 2016) : 6463–67. http://dx.doi.org/10.1166/jctn.2016.5587.

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As one of the main hazard in the downhole operation, the coal dust not only threats the safety of underground workplaces, but also affects the health of workers. In this paper, we elaborate the current situation of dust in the full-mechanized work face and corresponding preventive measures, design an air curtain dust-collecting device and analyzes its working principle. In order to study the effect of dust prevention of the proposed air curtain dust-collecting device, we studied the movement rule of wind and dust by software of FLUENT. The simulation result shows that the air curtain can control the dust concentration well in the full-mechanized work face. Most of the dust generated during tunneling operations have been cut off in the driver’s front air curtain, and this helps us to effectively avoid the dust spreading to the side of the operating driver.
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Yang, Zi Xian, Xiao Dong Ji, Hai Jiang, Yu Long Hu et Miao Wu. « Test and Research on Vibration Characteristics of EBH300(A) Roadheader ». Applied Mechanics and Materials 487 (janvier 2014) : 352–56. http://dx.doi.org/10.4028/www.scientific.net/amm.487.352.

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Cantilever excavator is widely used in fully mechanized mining face at present domestic coal mine, Its high efficiency, reliable working state is the promise of mine production and safety production. In this paper, using the mining vibration recorder for EBH300(A) roadheader vibration signal acquisition, and using MATLAB to analyze in the time domain analysis. Its useful to understand the vibration characteristics of roadheader work, and of important realistic significance for the tunneling machine structure optimization design and researching on fault diagnosis.
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Meschke, G., F. Nagel et J. Stascheit. « Computational Simulation of Mechanized Tunneling as Part of an Integrated Decision Support Platform ». International Journal of Geomechanics 11, no 6 (décembre 2011) : 519–28. http://dx.doi.org/10.1061/(asce)gm.1943-5622.0000044.

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Conrads, Alena, Markus Scheffer, Hannah Mattern, Markus König et Markus Thewes. « Assessing maintenance strategies for cutting tool replacements in mechanized tunneling using process simulation ». Journal of Simulation 11, no 1 (février 2017) : 51–61. http://dx.doi.org/10.1057/s41273-016-0046-5.

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Baderna, Diego, Eleonora Lomazzi, Alice Passoni, Alberto Pogliaghi, Maria Ifigeneia Petoumenou, Renzo Bagnati, Marco Lodi et al. « Chemical characterization and ecotoxicity of three soil foaming agents used in mechanized tunneling ». Journal of Hazardous Materials 296 (octobre 2015) : 210–20. http://dx.doi.org/10.1016/j.jhazmat.2015.04.040.

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Liang, Sheng Kai. « Technology Research on Rapid Excavation of Large Section Super-Long Coal Roadway ». Advanced Materials Research 1010-1012 (août 2014) : 1560–63. http://dx.doi.org/10.4028/www.scientific.net/amr.1010-1012.1560.

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The design construction length of conveyance roadway of the mine working face is nearly 5000m and the section area of driving is 18m2, belongs to large section super-long coal roadway. Through advanced mechanized supporting facilities tunneling construction and using reasonable support pattern and labor organization, it ensured the safety of workers, reduced the labor intensity, and realized the safety and rapid excavation with 440m/month. The economic and social benefit is obviously. It could provide reference meaning for other large section coal roadway rapid excavation at home and abroad.
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Cheng, Wei Min, Wen Nie, Gang Pan, Sen Cao et Xin Hua Zhang. « Study and Prevention on the Diffusion Rule of Dust Pollution in the Coal Mine Whole-Rock Fully Mechanized Workface ». Applied Mechanics and Materials 246-247 (décembre 2012) : 608–13. http://dx.doi.org/10.4028/www.scientific.net/amm.246-247.608.

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The mathematical model of solving two-phase flow of gas and dust particles was built by established the k-ε-Θ-kp equation. Moreover, by using FLUENT software, the diffusion rule of dust pollution in the whole-rock fully mechanized workface was researched with different air-draft amount. The result showed that when the air-draft amount increased from 320m3/min to 600m3/min, de-dust ability of extraction fan drum is gathering strength, pervasion intensity of producing dust is continuously decreased in tunneling place. The simulation results of each measuring point are basically consistent with the field measurement results.
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Nezarat, Hamidreza, Farhang Sereshki et Mohammad Ataei. « Ranking of geological risks in mechanized tunneling by using Fuzzy Analytical Hierarchy Process (FAHP) ». Tunnelling and Underground Space Technology 50 (août 2015) : 358–64. http://dx.doi.org/10.1016/j.tust.2015.07.019.

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Zare Naghadehi, Masoud, Markus Thewes et Arash Alimardani Lavasan. « Face stability analysis of mechanized shield tunneling : An objective systems approach to the problem ». Engineering Geology 262 (novembre 2019) : 105307. http://dx.doi.org/10.1016/j.enggeo.2019.105307.

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Tali, Naser, Gholam Reza Lashkaripour, Mohamad Ghafoori et Naser Hafezimoghadas. « Problems of Mechanized Tunneling In Gassy Ground Conditions a Case Study : Nousoud Water Transmission Tunnel ». International Journal of Geography and Geology 3, no 8 (19 juillet 2014) : 101–13. http://dx.doi.org/10.18488/journal.10/2014.3.8/10.8.101.113.

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Current advances in science, followed by development of excavation equipments technology resulted in growth of tunnelling projects for different purposes. In spite of conducting exploratory studies prior to these projects, in some cases due to of impassable paths, the studies are limited to certain areas. Hence, during geotechnical studies, it is possible that all problems facing tunnelling not be detected. Therefore, lack of awareness of these conditions can result in a lack of proper planning and consequently lead to problems during the projects. Due to the lack of knowledge and consequently not predicting and planning the projects, drilling of the second sector of Nousoud water transmission tunnel, -26 km long- has been faced with many problems including emission of hydrogen sulfide and methane gas and drainage of high volumes of water containing dissolved gas into the tunnel, which has led to the loss of life, loss of working efficiency, as well as increased project costs. In this study, problems occurred in this project, reasons behind them will be addressed; and the solutions to these problems will be mentioned. The results of the study have shown that oil-bearing formations of the region and the immigration of gases coming from these formations have let the gas entered into the tunnel. In addition, due to the high solubility of hydrogen sulfide and methane gas in water on one hand, and hydrated formations with high permeability on the other hand, caused the influx of large quantities of water and therefore the concentration of these gases in the tunnel.
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Shayanfar, Mohsen Ali, Payman Mahyar, Ahmad Jafari et Mohammad Mohtadinia. « Classification of Precast Concrete Segments Damages during Production and Transportation in Mechanized Shield Tunnels of Iran ». Civil Engineering Journal 3, no 6 (30 juin 2017) : 412–26. http://dx.doi.org/10.28991/cej-2017-00000101.

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Precast concrete segments used in shield tunnel linings are prone to damage in many situations. These damages can occur at different stages such as fabrication in segment factory, transportation to tunneling site, during tunneling process, and at serviceability stage. The aim of the present article is to study the damages inflicted on concrete segments during production and transportation, and to present a new classification of these damages throughout the two stages. The developed classification is based on field observations and examinations of major subway and water conveyance mechanized shield tunnels of Iran, located in Tehran, Tabriz, Mashhad, Kermanshah (Nosood) and Isfahan (Golab). The quality of tunnel lining suffers from what, as a direct consequence of any damage to concrete segments, during production and transportation, which will be also discussed in this article. For further investigation, more than 250 concrete segments from Tehran subway line 3 and 350 segments of concrete segments from Tehran subway line 7 were selected and studied for a statistical analysis of chipping and crack, consecutively. Absence of preventive measures to limit segment damages in precast segment factories is one of the main reasons for increased number of damaged concrete segments, and as a result, increased costs of tunnel construction at later stages. In this paper, production phase damages and factors contributing to these damages are studied. According to the findings of the study, the human (operator) error was the most important cause for chipping, and, time-dependent behavior of concrete was the essential reason in crack of precast segments. Eventually, final section of the article presents practical solutions for reduction of damages during fabrication and transportation of concrete segments.
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Do, Duc Phi, Xiangfeng Guo et Daniel Dias. « Probabilistic Stability Analysis of Deep Rock Tunnel Excavated by Mechanized Tunneling Considering Anisotropic Initial Stresses ». Applied Sciences 12, no 15 (26 juillet 2022) : 7479. http://dx.doi.org/10.3390/app12157479.

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Due to the complex geological conditions, the construction of underground tunnels in the rocks exhibiting creep behaviors is a great challenge and the structures’ long-term stability is of main importance. The excavation by tunnel boring machines (TBM) of a tunnel that is supported by a double flexible/concrete liner is considered a potential technical solution. However, the efficiency of such a support system on the stability at long-term of a tunnel must be verified in the real condition by considering both the effects of uncertainties of the time-dependent rock behavior and anisotropy of initial stress state. In this paper, the subset simulation and the Sobol global sensitivity analysis are chosen to estimate the failure probability of the tunnel supports and quantify the importance of different random parameters, respectively. The results reveal that considering the anisotropy of initial stresses increases the failure probability, especially in the concrete support elements. In addition, the parameters of initial stresses are the ones of main importance for both liners according to the Sobol indices. Therefore, the anisotropy of initial stresses and the related uncertainties should be considered for reliable tunnel designs.
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Gall, Vojtech Ernst, Ahmed Marwan, Mario Smarslik, Markus Obel, Peter Mark et Günther Meschke. « A holistic approach for the investigation of lining response to mechanized tunneling induced construction loadings ». Underground Space 3, no 1 (mars 2018) : 45–60. http://dx.doi.org/10.1016/j.undsp.2018.01.001.

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Zhao, Chenyang, Arash Alimardani Lavasan, Raoul Hölter et Tom Schanz. « Mechanized tunneling induced building settlements and design of optimal monitoring strategies based on sensitivity field ». Computers and Geotechnics 97 (mai 2018) : 246–60. http://dx.doi.org/10.1016/j.compgeo.2018.01.007.

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Nguyen, Luan T., et Tamara Nestorović. « Nonlinear Kalman Filters for Model Calibration of Soil Parameters for Geomechanical Modeling in Mechanized Tunneling ». Journal of Computing in Civil Engineering 30, no 2 (mars 2016) : 04015025. http://dx.doi.org/10.1061/(asce)cp.1943-5487.0000495.

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Stematiu, Alexandru. « Control of EPB TBM tunneling parameters to mitigate the effects on Dambovita river structures ». Journal of Engineering Sciences and Innovation 4, no 1 (5 mars 2019) : 43–56. http://dx.doi.org/10.56958/jesi.2019.4.1.43.

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This paper presents an assessment of the impact of tunnelling of the M5 Metro line in Bucharest, and its associated risks on Dambovita river development located in the influence zone of tunnelling operation. During the metro performance the undercrossing of the hydraulic works related to the Dambovita River was required. The Dambovita River hydraulic development is made of 2 main components – the upper clean water channel and the sewage/drainage system cassette, placed below (the base slab of the channel representing the roof of the cassette). On the left river bank, the B0 collector is an old structure with uncertain technical condition Tunnelling in proximity of existing development introduces deformations in both structures and in turn induces additional axial and bending forces. In modern mechanized tunnelling, ground convergence is controlled through balancing the earth pressure at the tunnel face. Reducing ground deformation can consequently lower the additional deformations and forces and lessen the associated construction risk. In this paper, a detailed finite element modelling was performed to simulate the sequence of construction works. The model was calibrated based on the measured settlements behind the face. Based on model results the undercrossing area of influence is revealed. Recommendations regarding the tunnelling works are made in order to avoid any damages to the existing facilities.
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Kong, Jie, Zhen Ma, Ming Nan Ji, Jun Long Xue et Cheng Gang Wang. « The Research of Fully Mechanized Tunneling Efficient Construction Organization Design of the Inclined Shaft in Hecaogou Mine ». Advanced Materials Research 753-755 (août 2013) : 835–38. http://dx.doi.org/10.4028/www.scientific.net/amr.753-755.835.

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Construction organization design is an important technology economy file of guiding the project construction. The sectional area of auxiliary inclined shaft is 21.6m2, belongs to big section of long inclined shaft. Based on the geological condition, auxiliary inclined shaft in Hecaogou mine optimized the construction organization design and adopted four-eight cross recycling way. Thanks to the use of high-power EBZ318H comprehensive tunneling machine, it has realized the rapid construction of inclined well, achieved the good grades of 227 m in the highest month .The well had good engineering quality and no safety accidents, implementing the fast construction of safe and efficient, high quality, economic benefit and social benefit . At the same time, it had accumulated rich experience for big section of long inclined shaft construction.
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Dang, Van Kien, Ngoc Anh Do, Tai Tien Nguyen, Anh Duy Huynh Nguyen et Van Vi Pham. « An overview of research on metro tunnel lining in the sub-rectangular shape ». Journal of Mining and Earth Sciences 62, no 4 (31 août 2021) : 68–78. http://dx.doi.org/10.46326/jmes.2021.62(4).08.

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Circular tunnels are the most popular shapes used in urban underground transportation systems when mechanized tunneling is used for tunnel excavation. However, circular tunnels have a small space utilization ratio. With the material development, non - circular tunnels such as sub - rectangular, U - shaped lining, etc. are now common, and their cross - section helps to improve the underground space utilization. However, there have been not many studies on the structure and the calculation method of the metro tunnels with the above cross - sections. The paper uses the analytical synthesis method to find out the advantages and disadvantages, the application conditions of the sub - rectangular shape, as well as the development direction for the complete calculation methods for this cross - section in Vietnamese conditions.
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Rehman, Hafeezur, Abdul Muntaqim Naji, Kyoungmin Nam, Saeed Ahmad, Khan Muhammad et Han-Kyu Yoo. « Impact of Construction Method and Ground Composition on Headrace Tunnel Stability in the Neelum–Jhelum Hydroelectric Project : A Case Study Review from Pakistan ». Applied Sciences 11, no 4 (12 février 2021) : 1655. http://dx.doi.org/10.3390/app11041655.

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During underground construction, the behavior of the ground is influenced by characteristics of the rock mass with situ stresses and ground water, cross section of the excavation area, excavation method, and the rate of excavation. These fundamental features are considered to ensure the support and stability of underground excavations and achieve long-term successful operation. However, the ground composition of the Himalayas hinders tunnel excavation, especially in case of mechanized tunneling; this causes time and cost overruns. This study has reviewed the recently completed Neelum–Jhelum Hydroelectric Project; the project complexities, geological environments involving significant overburden and tectonic stresses, and effects of the excavation method on tunnel stability were analyzed. The major challenges that were encountered during construction are discussed herein along with their countermeasures. An analysis of project-related data reveals that latest techniques and approaches considering rock mechanics were used to complete the project; the existing approaches and methods were accordingly verified and extended. Apart from ground composition, the excavation methods used play an important role in the occurrence of severe rock bursts. Thus, the findings of this study are expected to be helpful for future tunneling projects in the Himalayas.
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Duhme, Ruben, Markus Thewes et Markus König. « Analytische und Simulationsbasierte Planungsansätze im mechanisierten Tunnelbau/Analytic and simulation based planning approcahes in mechanized tunneling ». Bauingenieur 95, no 06 (2020) : 230–41. http://dx.doi.org/10.37544/0005-6650-2020-06-74.

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Zusammenfassung Viele Tunnelbaustellen leiden unter logistikbedingten Verzögerungen. In vielen Fällen, in denen die tatsächlich erzielten Tagesleistungen sogar deutlich unter den geplanten Werten liegen, lassen sich die Ursachen in der zugrundeliegenden Planung der logistischen Systeme verorten. In diesen Fällen ist es für die Verantwortlichen notwendig, die Wirksamkeit von Gegenmaßnahmen zu evaluieren. Neben dem Fehlen von geeigneten, strukturierten Planungsmethoden für die Baustellenlogistik, welche aus anderen Branchen wie zum Beispiel dem Automobilbau transferiert werden könnten, ist in vielen Fällen die verfügbare Datenbasis zur Leistung der Logistikketten zu wenig umfassend. Auf der Basis einer umfassenden Analyse der Logistikketten verschiedener Tunnelbaustellen stellen die Autoren einen Überblick über die in der Branche verwendeten Planungshilfsmittel vor und fassen sie zu einem systematischen Planungsansatz für die Versorgungslogistik von Tunnelvortrieben zusammen. Weiterhin wird der Einsatz von Prozesssimulation als unterstützendes Werkzeug vorgestellt und in seinen Fähigkeiten und Limitationen anhand eines Beispielprojektes mit traditionellen Methoden verglichen. Mithilfe von simulationsbasierten Planungsmethoden lässt sich die Produktivität der Baustelle als Gesamtsystem untersuchen um gezielte Kosten – Nutzen Abwägungen zum Einsatz bestimmter Logistiksysteme durchführen. Dies kann in der Praxis dazu beitragen, logistikbedingte Leistungsabfälle zu vermeiden.
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Obel, M., A. Marwan, A. Alsahly, S. Freitag, P. Mark et G. Meschke. « Schadensbewertungskonzepte für innerstädtische Bauwerke bei maschinellen Tunnelvortrieben/Damage assessment concepts for urban structures during mechanized tunneling ». Bauingenieur 93, no 12 (2018) : 482–91. http://dx.doi.org/10.37544/0005-6650-2018-12-44.

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Der Schutz bestehender Gebäude spielt eine zentrale Rolle bei innerstädtischen Tunnelbaumaßnahmen. Durch den Vortrieb entstehen unvermeidlich Bodenbewegungen, deren Einfluss auf die Gebäude zu bewerten ist. Je nachdem, ob geringe oder ausgeprägte Setzungen zu erwarten sind und setzungsunempfindliche oder –empfindliche Gebäude vorliegen, bieten sich dazu verschieden genaue und ebenso verschieden aufwendige Methoden an. Der Beitrag stellt das Konzept der Schädigungsbewertung aus drei Teilschritten vor, nämlich der Prognose der Bodenbewegung über analytische sowie einfache oder komplexe numerische Ansätze, der Idealisierung von Bauwerken zu Ersatzmodellen wie Balken-, Scheiben- oder 3D-Modelle und der Schädigungsbewertung anhand von rechnerischen Neigungen oder Dehnungskennwerten. Für alle drei Teilschritte werden Methoden verschiedener Genauigkeit vorgestellt. Es liegt auf der Hand, diese zur Bewertung von innerstädtischen Trassen, also einer Vielzahl von Gebäuden, konsekutiv zu verwenden. Dementsprechend reichen einfache aber ungenaue Ansätze bei unkritischen Lagen aus, während aufwendigere und genauere Methoden für setzungsempfindliche Mauerwerksbauten oder oberflächennahe Unterfahrungen erforderlich werden. Ziel ist ein Ausgleich zwischen Schnelligkeit und Genauigkeit, also möglichst wirtschaftlich Schadensbewertungen an Bauwerken vorzunehmen und gleichzeitig kostenintensive Kompensationsmaßnahmen auf tatsächlich nötige Einsätze zu beschränken. Die Forschungsarbeiten sind im Rahmen des Sonderforschungsbereichs 837 „Interaktionsmodelle für den maschinellen Tunnelbau“ an der Ruhr-Universität Bochum entstanden.
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Trapp, Maximilian, et Tamara Nestorović. « Non-gradient full waveform inversion approaches for exploration during mechanized tunneling applied to surrogate laboratory measurements ». Tunnelling and Underground Space Technology 120 (février 2022) : 104252. http://dx.doi.org/10.1016/j.tust.2021.104252.

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Youn, Bou-Young, et Rolf Breitenbücher. « Influencing parameters of the grout mix on the properties of annular gap grouts in mechanized tunneling ». Tunnelling and Underground Space Technology 43 (juillet 2014) : 290–99. http://dx.doi.org/10.1016/j.tust.2014.05.021.

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Zhao, Chenyang, Arash Alimardani Lavasan, Thomas Barciaga et Tom Schanz. « Mechanized tunneling induced ground movement and its dependency on the tunnel volume loss and soil properties ». International Journal for Numerical and Analytical Methods in Geomechanics 43, no 4 (7 janvier 2019) : 781–800. http://dx.doi.org/10.1002/nag.2890.

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Yang, Guang Rong, Ji Li, Fei Wang et Xi Dong Zhao. « Research on Support Technology of Long Anchor in Fully-Mechanized Caving Thick Coal Broken Roadway ». Advanced Materials Research 734-737 (août 2013) : 809–14. http://dx.doi.org/10.4028/www.scientific.net/amr.734-737.809.

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The 5204 transport roadway roof displacement encountered during the tunneling and mining is more than 240mm, which severely damaged the shape of the roadway. The anchor cable of the top is pulled off and supporting failure takes place. According to the analysis of the surrounding rock pressure behavior law, the concept of supporting new technology based on the concept of "coordinating role of long bolt - surrounding rock" is brought up. This technology can achieve a reasonable match of the supporting object with the displacement and support strength of the surrounding rock. Based on this concept, FLAC3D numerical simulation analysis, combined with the engineering analogy method, produces the long bolting parameters on the 5402 transport roadway. The industrial test results show that in the mining face, the force state of the long bolt is good. When larger displacement in the roof appears, the long bolt is not pulled off and the support failure does not occurs .It means the long bolt has adapted the large deformation of the roadway roof. The research results can provide a reference for similar mechanized caving roadway supporting.
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Wang, Su Yu, Yi Bo Du et Miao Wu. « Remote Control Techniques and Monitoring System for Roadheader ». Advanced Materials Research 791-793 (septembre 2013) : 878–83. http://dx.doi.org/10.4028/www.scientific.net/amr.791-793.878.

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The system which could be described as "trinity, seven subsystems" has realized automatic remote control of the machine working process with orientation, localization and formalization. At local place, it realized automatic position and pose online detection, automatic orientation tunneling, automatic section cutting and forming and adaptive control of cutting arm swaying speed. It was the first time that realized absolute measuring of roadheader frame position and pose error under coal mine working condition in our country which could avoid error accumulation in relative measuring and guarantee the high precision of orientation tunneling. In underground remote, it realized remote monitoring, wireless remote control and video surveillance, thus realized remote control with multiple angles, visualization and one-button control under the condition of dustiness and vibration. At any network access point on ground using mining ring network, it realized real-time monitoring and displaying of roadheader running state parameters, and realized the functions of remote fault diagnosis and alarming. The whole system has been tested many times underground. The application results show that it is stable and reliable. With the development of automation, intellectualization, and informatization and other high technology, this system will be more and more suitable for fully mechanized excavation face.
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Thai, Do Ngoc, et Do Duc Toan. « Study of the influence of face pressure on surface settlements by shield tunneling ». Journal of Mining and Earth Sciences 61, no 1 (28 février 2020) : 31–40. http://dx.doi.org/10.46326/jmes.2020.61(1).04.

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In the mechanized excavation of subway tunnels, the shield tunnel boring machine (TBM) has been developed in recent decades for managing the instability of the excavation profile in complicated geotechnical conditions in urban areas. The paper presents a 3D simulation procedure for the detailed description of TBM (via the finite element code Abaqus) and quantifies the influence of TBM face pressure on ground surface settlements. The model is used to calculate ground surface settlements for different values of TBM face pressure. An additional aspect of the investigation is the determination of the critical value of TBM face pressure, which controls face instability in very weak ground. During the advancement of shield tunnel boring machines, the face-stabilizing pressure is one of the most important factors of critical. In tunneling by shield tunnel boring machines, high face pressure often leads to surface upheaval, whereas low face pressure leads to sudden collapse of the face and ultimately settlement of the surface. For the model condition, the maximum value was quantity 250 kPa and the minimum value obtained quantity 150 KPa.
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Mohammadzamani, Danial, Arash Alimardani Lavasan et Torsten Wichtmann. « Tail void grouting material : A parametric study on the role of hydro-mechanical characteristics in mechanized tunneling ». Tunnelling and Underground Space Technology 135 (mai 2023) : 105053. http://dx.doi.org/10.1016/j.tust.2023.105053.

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Khakimov, Abduboki, Gullola Kutumova et Zamira Mirzaeva. « Current trends in the development of automation surveying support in the construction of subways ». E3S Web of Conferences 168 (2020) : 00010. http://dx.doi.org/10.1051/e3sconf/202016800010.

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The article discusses the basic principles and conditions for the use of the latest underground navigation system. An example is given of the second new Yunusabad line of the Tashkent Subway using the shield method. For the first time in the Republic of Uzbekistan, in the construction of the Tashkent metro stations by underground, the Tunneling Mechanized Complex (TMC) was used - a movable prefabricated metal structure manufactured in Germany by the company HERRENKNECHT, which is the leading company in the world and produces machines for the construction of tunnels of any diameter in the range from 0.10 to 19 m in any engineering-geological conditions. The disadvantages and advantages of the underground navigation system are indicated; conclusions are drawn about the prospects for its application. The patterns of development of technical aspects of the automation of surveying concerning general historical trends are examined.
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