Bibliografías temáticas / Soft subgrade soil

Literatura académica sobre el tema "Soft subgrade soil"

Autor: Grafiati
Publicado: 27 de julio de 2024
Última modificación: 28 de julio de 2024

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Artículos de revistas sobre el tema "Soft subgrade soil"

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Xu, Siyuan, Jie Liao y Kewei Fan. "Mechanism and Application of Soilbags Filled with Excavated Soil in Soft Soil Subgrade Treatment". Applied Sciences 14, n.º 5 (22 de febrero de 2024): 1806. http://dx.doi.org/10.3390/app14051806.

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This research addresses the characteristics of soft soil subgrades treated by soilbags filled with excavated clayey soil. We evaluated of the strength and deformation modulus of soilbags containing excavated soil using unconfined compression tests. In addition, the drainage consolidation characteristics of soilbag-treated subgrades were investigated via model consolidation tests. Furthermore, a practical application included the construction of a 100 m-long rural road subgrade with these soilbags. The field test and numerical simulation results included the surface settlement and pore water pressure during and after construction to validate the effectiveness of the soilbag treatment for soft soil subgrade. The results show that the soilbags significantly enhanced both the strength and deformation modulus of the soft soil, which met the design requirements after the soilbag treatment. The drainage attributes of the soilbag treatment were also found to support the consolidation process of the soft soil subgrade effectively. Notably, the pore water pressure diminished rapidly during the construction interval, which is beneficial to reducing the post-construction settlement. The settlement uniformity of the subgrade is good verification of the superiority of the soilbag-treated subgrades.
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2

Ma, Lijie y Ying Kong. "Application Research of CFG Piles in the Treatment of Soft Soil Foundations for High-Speed Railways". Academic Journal of Science and Technology 7, n.º 1 (23 de agosto de 2023): 194–99. http://dx.doi.org/10.54097/ajst.v7i1.11368.

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In the construction of high-speed railways in our country, various complex terrains and geologies are often encountered. Therefore, the treatment of special subgrades, especially the reinforcement of soft soil subgrades, becomes extremely important. Currently, there are many methods for reinforcing weak and soft soil foundations, and during construction, appropriate and economical treatment methods should be selected based on the actual site conditions. This article intends to use the reinforcement treatment of the subgrade in the section from DK30+000 to +347.62 of the Ningbo-Hangzhou Passenger Dedicated Line as a basis to discuss the reinforcement of soft soil foundations and the application of CFG piles in soft soil foundations.
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3

Chaudhary, Braj Kishore y Gopal Gautam. "Cost Comparison of Flexible Pavement on Weak Sub-Grade Soil Modified with Lime and SD". SCITECH Nepal 17, n.º 1 (13 de diciembre de 2023): 64–71. http://dx.doi.org/10.3126/scitech.v17i1.60491.

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The effectiveness of flexible pavement is affected by the subgrade quality. The subgrade refers to a compacted layer of soil that provides sideways support to the pavement. When constructed on a weak subgrade, it negatively impacts the pavement's performance, leading to a shorter lifespan. Traditionally, the common method to stabilize a soft subgrade involves removing the weak soil and replacing it with stronger soil. However, due to the high expenses associated with soil replacement, highway agencies are exploring alternative approaches to constructing highways on soft subgrades. Soil stabilization is a commonly employed alternative in pavement construction, serving as an effective method to enhance the engineering characteristics of soil, including its strength and stability. This paper focuses on the utilization of lime and stone dust (SD) as admixtures for an efficient ground improvement technique over weak subgrade soil deposits. The California Bearing Ratio (CBR) test is conducted by making the specimens of weak subgrade by adding the variable percentages of a mixture of lime and SD. First, the soil was mixed up with lime to 12% by weight with an increment of 3% again the soil was mixed with SD with increments of 10% up to 50% by weight of soil. The study determined an optimal lime content of 3% based on the geotechnical properties of the mixture and the cost considerations of lime and the weak subgrade. Following this, SD was added to the optimized lime-weak subgrade mixture in varying increments of 10% by weight, up to a maximum of 40%. The modified mixes were then evaluated for their CBR and maximum dry density values. The CBR is increased to 15% and the total pavement thickness decreased to 725 mm for 50% SD addition with 4.89 % in cost reduction.
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Waruwu, Aazokhi, Paulus Dwi Surya Emili Yanto, Rika Deni Susanti y Syukurman Harefa. "Study bearing capacity of subgrade using combination bamboo grid and stabilized soil". Journal of Infrastructure Planning and Engineering (JIPE) 1, n.º 2 (25 de octubre de 2022): 87–92. http://dx.doi.org/10.22225/jipe.1.2.2022.87-92.

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The subgrade of road construction also determines the strength and resistance to loads on it. The subgrade in the field very varies from soft clay to hard soil. The subgrade of soft clay requires soil improvement to increase bearing capacity. This study aims to determine the increase in bearing capacity and modulus of subgrade reaction in stabilized soil with the bamboo grid. The research was conducted through a physical model using a test box. Soft clay is compacted and the above it is replaced with stabilized soil with and without the bamboo grid. The height of stabilized soil varied from 0-15 cm. The results showed that the bearing capacity increased along with the increase in height of stabilized soil. The subgrade of stabilized soil which was given additional reinforcement of bamboo grid was able to increase the value of bearing capacity and modulus of subgrade reaction. A significant increase was obtained in the height of stabilized soil at least equal to the diameter of the test plate.
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Tan, Feng y Tai Quan Zhou. "Finite Element Analysis for Subgrade Consolidation Settlement in Soft Soil". Applied Mechanics and Materials 448-453 (octubre de 2013): 1256–59. http://dx.doi.org/10.4028/www.scientific.net/amm.448-453.1256.

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The two-dimensional finite element model for subgrade consolidation settlement analysis within soft soil pile is developed using ABAQUS. The numerical simulation on a highway subgrade deformation is performed to study the variation of consolidation settlement and the excess pore water pressure distribution in the central location and the part under centerline of the embankment. The results show that settlement develops gradually with the increasing period of soil consolidation. The excess pore water pressure of deep subgrade soils under embankment centerline rise due to the increased load. After each soil layer was filled, the excess pore water pressure increased in the first and was stable later along with the increase of soil depth. After the embankment soil was filled completely, excess pore pressure dissipated with time developing until the completion of consolidation.
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6

Ashik, M. Mohamed. "Stabilization of Soft Subgrade Soil with Non-Woven Coir Geotextiles". International journal of Emerging Trends in Science and Technology 04, n.º 05 (23 de mayo de 2017): 5200–5202. http://dx.doi.org/10.18535/ijetst/v4i5.13.

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Liu, Song-Yu, Guang-Hua Cai, Guang-Yin Du, Liang Wang, Jiang-Shan Li y Xing-Chen Qian. "Field investigation of shallow soft-soil highway subgrade treated by mass carbonation technology". Canadian Geotechnical Journal 58, n.º 1 (enero de 2021): 97–113. http://dx.doi.org/10.1139/cgj-2020-0008.

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The innovative carbonation technique based on reactive MgO and CO2 has been identified as an environmentally friendly and efficient method in the improvement of weak soils. Previous laboratory studies have indicated that carbonated MgO-admixed soils had significant improvement in mechanical properties. However, there are to date limited investigations on the soft-soil field application of this technique. In this study, a field trial was conducted to ascertain the feasibility of the MgO mass carbonation technique in improving shallow soft-soil subgrades. A series of field tests, including temperature, dynamic cone penetrometer, and light-weight deflectometer tests, were undertaken. The results indicated that compared with uncarbonated soil layers, there was two to three times increase in dynamic resilient moduli and soil resistances of carbonated MgO-admixed soils. The outcomes of this field investigation will contribute to the utilization of the combined stabilizer of MgO and CO2 and the mass carbonation technology in subgrade improvement.
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8

Rochim, A. y L. Fitriyana. "Characterization of Subgrade Soil of Lowland Areas of Semarang City". IOP Conference Series: Earth and Environmental Science 971, n.º 1 (1 de enero de 2022): 012034. http://dx.doi.org/10.1088/1755-1315/971/1/012034.

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Abstract The northern part of Semarang city has been suffering a lot from settlement and inundation caused by rainfall and tidal flood. The settlement is predicted to emerge from the subgrade soil containing soft soil with low bearing capacity and high compressibility. This study aims to characterize subgrade soil of lowland areas of Semarang city. In order to define the depth of soft soil, site class, soil classification, and the settlement, soil data was taken from twelve locations distributed in five sub districts of Semarang lowland areas. The minimum depth of subgrade soil is 30 m below the ground surface. To predict the settlement, subgrade soil was loaded by a surcharge load of 80 kPa, and a safety factor of 2 was taken into account. The analysis was based on N-SPT, cone resistance, index properties, and engineering properties. The result shows that the subgrade soil of Semarang lowland areas is dominated by soft clay with a depth of 5 m to 20 m with the site class from SE to SD. Soil is classified as CL and CH. The predicted settlement is from 0.321 m (lasts one year) to 1.395 m (lasts 13 years).
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Song, Bi Hong, Chun Ming Wang, Shu Guang Wang, Jian Hua Chen y Lu Ke. "Soft Soil Subgrade Vacuum Preloading Consolidation Deformation Analysis of Large Rigid Foundation". Advanced Materials Research 1095 (marzo de 2015): 556–60. http://dx.doi.org/10.4028/www.scientific.net/amr.1095.556.

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The large rigid foundation has a high requirement on subgrade consolidation deformation, especially the soft soil subgrade, of which the design and construction is very difficult. Through the analysis on subgrade treatment process of a sewage treatment plant in Zhejiang Province, this paper introduces the mathematical calculation model and the specific calculation method for treating the soft soil subgrade with the vacuum preloading method. The calculation results obtained has basically reflected the actual deformation process of the subgrade; it is a rational referential calculation method to guide the design and construction.
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Wang, Jiang y Long Cai Yang. "Measures and Mechanism of Reinforcement of Soft Subgrade of High Speed Railway in Operation". Applied Mechanics and Materials 353-356 (agosto de 2013): 866–71. http://dx.doi.org/10.4028/www.scientific.net/amm.353-356.866.

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Some subgrade of high-speed railway in operation occurred abnormal settlement,so need to reinforcement, however, the reinforcement measures and these mechanism have got little attention. Numerical analysis method was adopted to study the mechanism and effects of the grounting and churning pile which was used to reinforce soft soil subgrade a high-speed railway Results shows that the settlement and lateral deformation not symmetrical distribution but got larger along the inclined derection of stratum, reinforcement by grouting can decrease the settlement and the transverse differential deformation by improving the properties of soil, which can decrease the viod ratio and increase the compression modulus; reinforcement by churning pile which can increase the stability of embankment on soft soil subgrade. The result could provide theoretical guidance for reinforcement of soft soil subgrade of high speed railway in operation.
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Tesis sobre el tema "Soft subgrade soil"

1

Khoueiry, Nicole. "Study of granular platforms behaviour over soft subgrade reinforced by geosynthetics : Experimental and numerical approaches". Thesis, Lyon, 2020. http://www.theses.fr/2020LYSEI027.

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Les géosynthétiques sont utilisés depuis les années 70 dans le renforcement des plateformes granulaires reposant sur des sols de faible portance pour des applications de routes non revêtues. La complexité des mécanismes développés et la diversité des produits de renforcement nécessitent encore d’étudier ces plateformes renforcées. Un essai au laboratoire permettant de tester des plateformes à échelle réelle a été développé. Une plateforme granulaire non revêtue reposant sur un sol de faible portance a été reproduite. Un protocole de mise en place de ce sol a été élaboré pour assurer son homogénéité et la répétabilité des essais. Une instrumentation spécifique a été développée pour collecter le maximum de mesures utiles pour l’interprétation du transfert de charge et du comportement des géogrilles utilisées. Trois types de géogrille ont été testées : une géogrille extrudée et deux géogrilles tricotées de rigidité différente. Après de nombreux essais de faisabilité, dix essais ont été effectués sous un chargement cyclique sur plaque circulaire, la plateforme testée a été placée dans un banc d’essai de 1,8 m de large, 1,9 m de long et 1,1 m de haut. Sur la base du même protocole de mise en œuvre, des essais de circulation avec un Simulateur Accélérateur de Traffic (SAT) ont été effectués. Ce simulateur a été spécifiquement conçu et construit pour cette application. Pour ces essais, la plateforme testée a été placée dans le banc d’essai allongé à 5 m. La plateforme a été soumise à deux types de sollicitations : un chargement cyclique sur plaque et un chargement de circulation. Des essais de répétabilité ont permis de vérifier le protocole mis en place. A partir des essais, plusieurs observations ont pu être faites sur le comportement des plateformes granulaires, le sol peu porteur, et sur l’efficacité du renforcement. De plus, ces essais ont permis de montrer que le chargement de circulation est beaucoup plus endommageant que le chargement sur plaque. Parallèlement à ces essais, un modèle numérique a été développé en se basant sur la méthode des différences finies avec le logiciel FLAC 3D. Cette modélisation a permis de prédire le comportement de la plateforme sous le premier chargement de plaque
Geosynthetics were used since 1970 in the base course reinforcement supported by soft subgrade in unpaved road application. The various factors and parameters influencing the dominant mechanism and its relative contribution on the platform improvement explain the need of more investigations in this topic. In this research work, large-scale laboratory test was developed to study the reinforcement contribution in the unpaved road improvement. Therefore, an unpaved platform was built of 600 mm of artificial subgrade supporting a base course layer. A detailed experimental Protocol was established regarding the soil preparation, the installation and the soils compaction procedure to reproduce the site conditions and insure the platform repeatability for each test. Three geosynthetics were tested first under a cyclic plate load test. Cyclic load was performed on the prepared platform, with a maximum load of 40 kN resulting in a maximum applied pressure of 560 kPa. The platform was subjected to 10,000 cycles with a frequency of 0.77 Hz. An advanced and complete soil instrumentation was provided in order to collect the maximum data needed for thorough analysis. Quality control tests were performed before each test to verify the soil layers homogeneity and properties. Two base course thicknesses were tested under this test condition, 350 and 220 mm. Once the developed protocol was confirmed under the circular plate load tests, further tests using the Simulator Accelerator of Traffic (SAT) were performed. Indeed, the laboratory prepared platform was placed in a larger box of 1.8 m in large, 5 m in length and 1.1 m in height. The prepared platform was subjected to two solicitations: a particular plate and traffic load. The Simulator Accelerator of Traffic was developed specially for this application. A machine that simulates the traffic load under an effective length of 2 m and a velocity of 4 km/h. The two areas were instrumented: the area under the circulation load, and the area under the plat load, located aside. In addition, a numerical model based on the differential element method using FLAC 3D was developed. The model simulated the circular plate load test with the same platform configuration under monotonic load. The results were compared to the first monotonic load applied on the rigid plate experimentally
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2

Dong, K., D. P. Connolly, O. Laghrouche, P. K. Woodward y Costa P. Alves. "The stiffening of soft soils on railway lines". Elsevier, 2018. https://publish.fid-move.qucosa.de/id/qucosa%3A73234.

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Railway tracks experience elevated rail deflections when the supporting soil is soft and/or the train speed is greater than approximately 50% of the wave propagation velocity in the track-soil system (i.e. the critical velocity). Such vibrations are undesirable, so soil replacement or soil improvement of the natural soil (or alternatively mini-piles or lime-cement treatment) is often used to increase track-ground stiffness prior to line construction. Although areas of existing soft subgrade might be easily identified on a potential new rail route, it is challenging to determine the type and depth of ground remediation required. Therefore, major cost savings can be made by optimising ground replacement/improvement strategies. This paper presents a numerical railway model, designed for the dynamic analysis of track-ground vibrations induced by high speed rail lines. The model simulates the ground using a thin-layer finite element formulation capable of calculating 3D stresses and strains within the soil during train vehicle passage. The railroad track is modelled using a multi-layered formulation which permits wave propagation in the longitudinal direction, and is coupled with the soil model in the frequency-wavenumber domain. The model is validated using a combination of experimental railway field data, published numerical data and a commercial finite element package. It is shown to predict track and ground behaviour accurately for a range of train speeds. The railway simulation model is computationally efficient and able to quickly assess dynamic, multi-layered soil response in the presence of ballast and slab track structures. Therefore it is well-suited to analysing the effect of different soil replacement strategies on dynamic track behaviour, which is particularly important when close to critical speed. To show this, three soil-embankment examples are used to compare the effect of different combinations of stiffness improvement (stiffness magnitude and remediation depths up to 5 m) on track behaviour. It is found that improvement strategies must be carefully chosen depending upon the track type and existing subgrade layering configuration. Under certain circumstances, soil improvement can have a negligible effect, or possibly even result in elevated track vibration, which may increase long-term settlement. However, large benefits are possible, and if detailed analysis is performed, it is possible to minimise soil improvement depth with respect to construction cost.
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Geiman, Christopher Matthew. "Stabilization of Soft Clay Subgrades in Virginia Phase I Laboratory Study". Thesis, Virginia Tech, 2005. http://hdl.handle.net/10919/32499.

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Many pavement subgrades in Virginia consist of wet, highly plastic clay or other troublesome soils. Such soils can be treated with traditional lime and cement stabilization methods. Alternatives, including lignosulfonates and polymers, are available, but their performance record is mixed and solid engineering data is lacking, which prevents reliable design. The goal of this research was to screen a suite of traditional and non-traditional stabilizers against three Virginia soils that have caused problems during construction or resulted in poor performance in service. The selected stabilizers were: quicklime, hydrated lime, pelletized lime, cement, lignosulfonate, synthetic polymer, magnesium chloride, and a proprietary cementitious stabilizer. A laboratory procedure was developed and applied to three Virginia soils obtained from Northern Virginia, Staunton, and Lynchburg. Key findings from the research include that (1) traditional lime and cement stabilizers were far more effective than liquid stabilizers (lignosulfonate, synthetic polymer, and magnesium chloride) in increasing strength, (2) the liquid stabilizers were ineffective on soils with high moisture content, (3) the proprietary cementitious stabilizer was more effective in increasing strength than lime for all cases tested, but not was not as effective as the cement stabilizer, (4) quicklime and hydrated lime increased workability of the soils although they did not produce strengths comparable to cement, (5) the strength of soils stabilized with cement and the proprietary cementitious stabilizer can be estimated based on the water-amendment ratio of the mixture, and (6) the strength of soils stabilized with lime can be estimated based on a combination of plasticity index and water-amendment ratio of the mixture.
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4

Abou, Chaz Nisrine. "Etudes expérimentale et numérique des plateformes granulaires renforcées par géosynthétiques sur sol mou". Electronic Thesis or Diss., Université Grenoble Alpes, 2024. http://www.theses.fr/2024GRALI031.

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La mauvaise qualité de la couche de fondation est un défi important dans la construction de routes non revêtues. Les géosynthétiques (GSY) sont des solutions innovantes développés à partir des années 70. Selon le type de GSY utilisé, ils peuvent assurer un ou plusieurs rôles, notamment la séparation, le renforcement par les effets membrane et la stabilisation par l'imbrication des grains de sol dans les ouverture de la géogrille et/ou le frottement à l'interface sol-GSY. Il existe dans la littérature peu de méthodes de dimensionnement pour quantifier ces mécanismes, et elles présentent des limites en raison de leur calibration sur des paramètres spécifiques aux GSY et au sol utilisé et, parfois, dans des conditions de charge statique plutôt que cyclique. La complexité des mécanismes et le nombre importants de paramètres qui interviennent dans leur mise en place requirent une analyse plus poussée dans ce domaine.Pour répondre à ce problème persistant, une série d'études expérimentales et numériques a été menée. Le volet expérimental a étudié la performance du renforcement sous des charges cycliques verticales et de circulation en testant deux GTX tissés avec deux rigidités de traction différentes et deux épaisseurs de plateformes granulaires. En parallèle à l'expérimentation, un modèle numérique couplant couplant la méthode des éléments discrets et la méthode des éléments finis (à l'aide du logiciel SDEC) a été utilisé. Ce modèle visait à mettre en évidence l'impact du GSY et des paramètres du sol sur le rôle du renforcement et à fournir des données sur des phénomènes difficiles à mesurer expérimentalement.Les plots expérimentaux sont formés d'une couche de sol de fondation avec un CBR d'environ 1 %, recouverte par une plateforme granulaire compactée d'une épaisseur de 300 mm ou 500 mm. Le GTX est placé à l'interface entre la couche de fondation et la couche de base. Les résultats ont montré que, sous des charges verticales cycliques, le GTX n’apportaient pas de gain d’efficacité des plateformes de 500 mm d’épaisseur. Pour une plateforme de 300 mm d’épaisseur, les deux GTXs ont réduit de manière significative le tassement par rapport à une plateforme non renforcée de la même épaisseur (300 mm) et à une plateforme plus épaisse (500 mm). L'amélioration la plus importante a été observée avec le GTX le plus rigide. Trois essais ont été réalisés avec une charge de trafic appliquée par le Simulateur Accélérateur de Trafic (SAT). Il a été démontré que la charge de circulation exerçait une plus grande déformation dans la plateforme par rapport à la charge verticale, mais il était difficile d'arriver à une conclusion définitive sur la comparaison entre une plateforme renforcée et non renforcée.Dans le modèle numérique, une loi de comportement (1D) a été intégrée prenant en compte les variations du module de réaction du sol pendant les phases de chargement et de déchargement ainsi qu’avec les cycles, et décrivant la transition d'un comportement plastique à un comportement quasi-élastique du sol compressible. Par ailleurs, la plateforme granulaire purement frottant a montré son incapacité à supporter la charge cyclique verticale appliquée sur une plaque circulaire placée au centre du modèle. Cette limitation « numérique » a nécessité l’ajout d’une cohésion entre les particules de sol. Une fois calibré, le modèle numérique s'est avéré capable de reproduire le comportement des plates-formes renforcées par GSYs sur sol mou au cours du premier cycle et au fur et à mesure des cycles. Initialement, les efforts de frottement dépassaient l'effet membrane, mais à mesure que la déflexion augmentait avec les cycles, l'effet membrane devenait plus important. En plus, une étude paramétrique sur la compressibilité de la couche de fondation, la rigidité du GSY, le frottement à l’interface sol granulaire-GTX et les paramètres mécaniques de la couche a permis de mettre en évidence l’influence de ces différents paramètres sur les mécanismes
Poor subgrade quality is a pervasive challenge in the construction of unpaved roads. Geosynthetics (GSYs) have emerged as innovative solutions since their initial usage in the late 1970s. Depending on the type of GSY employed, they can fulfil one or several roles, including separation, reinforcement by tensioned membrane effects, and stabilization by interlocking and/or friction at the soil-GSY interface. Few design methods exist in the literature to quantify these mechanisms, but they have limitations due to their calibration on specific GSY and soil parameters and, at times, under static rather than cyclic loading conditions. The various factors and parameters that influence the dominant mechanism and its corresponding contribution to platform enhancement underscore the necessity for further exploration in this area.To address this persistent issue, a series of experimental and numerical studies were conducted. The experimental part studied the performance of reinforcement under cyclic vertical and traffic loadings using two woven geotextiles (GTXs) with two different tensile stiffness and two base course thicknesses. Additionally, alongside the experimentation, a numerical model coupling the discrete element method and the finite element method (using Software-Defined Edge Computing) was employed. This model aimed to showcase the impact of GSY and soil parameters on reinforcement performance and provide insights into aspects challenging to measure through experimentation.The tested unpaved road sections are composed of a subgrade layer with a CBR around 1% covered by a compacted base course layer with thickness of 300 mm or 500 mm. The GTXs are placed at the interface between the subgrade and the base course layers. The results showed that the 500 mm base course reinforced platform did not exhibit reinforcement effects under vertical cyclic loading. However, the use of a 300 mm base course with GTX significantly reduced settlement compared to an unreinforced base course of the same thickness (300 mm) and to the thicker base course (500 mm). The most important improvement was observed with the highest-stiffness GTX. Moreover, three tests were performed under traffic loading applying by the Simulator Accelerator of Traffic (SAT). It was shown that traffic loading exerted greater deformation in the base course layer compared to vertical loading, but definitive conclusion can hardly be reached about the comparison between reinforced and unreinforced platform.In the numerical model, a behavioural law (1D) was integrated, considering the variation of the soil reaction modulus during loading and unloading phases and with cycles, and describing the transition of the soil from plastic to quasi-elastic behavior. In addition, the purely frictional base course layer revealed its incapacity to sustain the loading applied in the experimental. This inherent limitation prompted the incorporation of adhesion between soil particles to rectify this shortcoming in load-bearing capacity. Once calibrated the numerical model proved capable of accurately replicating the behavior of GTX-reinforced platforms in the first cycle and with cycles. It facilitated a quantification of the GTX friction effort and GTX tension effort with cycles. Initially, frictional forces outweighed the tensioned membrane effect, but as deflection increased with cycles, the latter became more prominent. This dynamic highlighted a diminishing dominance of the soil confinement mechanism with cycles, giving way to the increasing significance of the membrane effect. Furthermore, the subgrade softness, the GTX rigidity, the mattress-GTX interface parameters and the base course mechanical parameters influenced the behavior of the model
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Acosta, Hector A. "Stabilization of soft subgrade soils using fly ash". 2002. http://catalog.hathitrust.org/api/volumes/oclc/50873191.html.

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Thesis (M.S.)--University of Wisconsin--Madison, 2002.
Typescript. eContent provider-neutral record in process. Description based on print version record. Includes bibliographical references (leaves 120-125).
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Libros sobre el tema "Soft subgrade soil"

1

Zhu, Hanhua, Zhijun Wu, Mengchong Chen y Yongli Zhao. Controlling Differential Settlement of Highway Soft Soil Subgrade. Singapore: Springer Singapore, 2019. http://dx.doi.org/10.1007/978-981-13-0722-5.

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Wattanasanticharoen, Ekarin. Investigations to evaluate the performance of four selected stabilization methods on soft subgrade soils of southeast Arlington. Ann Arbor, Mich: UMI, 2002.

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Wu, Zhijun, Hanhua Zhu, Mengchong Chen y Yongli Zhao. Controlling Differential Settlement of Highway Soft Soil Subgrade: A New Method and Its Engineering Applications. Springer, 2018.

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Capítulos de libros sobre el tema "Soft subgrade soil"

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Zhu, Hanhua, Zhijun Wu, Mengchong Chen y Yongli Zhao. "Analysis of Differential Settlement of Highway Soft Soil Subgrade". En Controlling Differential Settlement of Highway Soft Soil Subgrade, 3–6. Singapore: Springer Singapore, 2018. http://dx.doi.org/10.1007/978-981-13-0722-5_1.

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Zhu, Hanhua, Zhijun Wu, Mengchong Chen y Yongli Zhao. "Practical Design Method for the Soft Soil Highway Subgrade". En Controlling Differential Settlement of Highway Soft Soil Subgrade, 43–62. Singapore: Springer Singapore, 2018. http://dx.doi.org/10.1007/978-981-13-0722-5_8.

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Zhu, Hanhua, Zhijun Wu, Mengchong Chen y Yongli Zhao. "Practice in Treatment of the Bumps at Bridgeheads on the Existing Highway in Taizhou City". En Controlling Differential Settlement of Highway Soft Soil Subgrade, 81–85. Singapore: Springer Singapore, 2018. http://dx.doi.org/10.1007/978-981-13-0722-5_10.

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Zhu, Hanhua, Zhijun Wu, Mengchong Chen y Yongli Zhao. "Practice in Treatment of the Bumps at Bridgeheads on the Highways in Wenzhou City". En Controlling Differential Settlement of Highway Soft Soil Subgrade, 87–93. Singapore: Springer Singapore, 2018. http://dx.doi.org/10.1007/978-981-13-0722-5_11.

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Zhu, Hanhua, Zhijun Wu, Mengchong Chen y Yongli Zhao. "Practice in Treatment of the Bumps at Bridgeheads of the Highways in Ningbo City". En Controlling Differential Settlement of Highway Soft Soil Subgrade, 95–105. Singapore: Springer Singapore, 2018. http://dx.doi.org/10.1007/978-981-13-0722-5_12.

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Zhu, Hanhua, Zhijun Wu, Mengchong Chen y Yongli Zhao. "Overview of Methods for Treating the Differential Settlement of the Soft Soil Highway Subgrade (Including the Bumps at Bridgeheads)". En Controlling Differential Settlement of Highway Soft Soil Subgrade, 7–11. Singapore: Springer Singapore, 2018. http://dx.doi.org/10.1007/978-981-13-0722-5_2.

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Zhu, Hanhua, Zhijun Wu, Mengchong Chen y Yongli Zhao. "Inspirations from the Stability of Ancient Structures". En Controlling Differential Settlement of Highway Soft Soil Subgrade, 13–17. Singapore: Springer Singapore, 2018. http://dx.doi.org/10.1007/978-981-13-0722-5_3.

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Zhu, Hanhua, Zhijun Wu, Mengchong Chen y Yongli Zhao. "Explorations of the Reasonable Structure of the Soft Soil Highway Subgrade and Solutions". En Controlling Differential Settlement of Highway Soft Soil Subgrade, 19–24. Singapore: Springer Singapore, 2018. http://dx.doi.org/10.1007/978-981-13-0722-5_4.

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Zhu, Hanhua, Zhijun Wu, Mengchong Chen y Yongli Zhao. "Comparative Test, Calculation, and Analysis Concerning the Stability and Looseness of the Soft Soil Highway Subgrade". En Controlling Differential Settlement of Highway Soft Soil Subgrade, 25–29. Singapore: Springer Singapore, 2018. http://dx.doi.org/10.1007/978-981-13-0722-5_5.

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Zhu, Hanhua, Zhijun Wu, Mengchong Chen y Yongli Zhao. "Comparative Test and Study of the Strength and Rheological Property of the Soft Soil Subgrade". En Controlling Differential Settlement of Highway Soft Soil Subgrade, 31–35. Singapore: Springer Singapore, 2018. http://dx.doi.org/10.1007/978-981-13-0722-5_6.

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Actas de conferencias sobre el tema "Soft subgrade soil"

1

He, Kefei, Jiachun Li y Weiping Tian. "Analysis of soft soil subgrade construction". En 5th International Conference on Civil Engineering and Transportation. Paris, France: Atlantis Press, 2015. http://dx.doi.org/10.2991/iccet-15.2015.252.

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Yin, Yong y Xiao-jun Yu. "Research on Applying Glass Fiber Cement Soil to Strengthen Soft Soil Subgrade". En GeoHunan International Conference 2009. Reston, VA: American Society of Civil Engineers, 2009. http://dx.doi.org/10.1061/41044(351)2.

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Tannoury, George A. y Steven D. Schrock. "Introduction to Chemical Stabilization of Unstable Trackbeds". En 2016 Joint Rail Conference. American Society of Mechanical Engineers, 2016. http://dx.doi.org/10.1115/jrc2016-5779.

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Resumen
Trackbeds are typically composed of all granular materials comprised of ballast and subballast over compacted subgrade. Most poor performances of railroads can be attributed to poor and unstable subgrade conditions. Below the surface, the instability of the subgrade material can propagate through the granular zone leading to excessive settlements and deformations of the railway. Conventional subgrade restoration in the trackbed system requires the removal of the granular materials and over-excavation of soft unstable subgrade materials, moisture adjustment, re-compaction, and sometimes chemical stabilization of the subgrade soils. Since these procedures are considered very expensive in terms of construction equipment, railway outage time, and labor force, alternative solutions for consideration and evaluation are essential. Injection of expansive foam (polymer based) materials is a relatively recent method that has been used in various applications of soil stabilization in the roadway industry. This technique relies on the injection of rigid-polyurethane foam, which is a high-density, expanding, thermoset, hydro-insensitive and environmentally neutral polyurethane-resin product, into the soft and unstable soil to improve their shear strength and stability index. In addition, the stabilized zone acts as a waterproof membrane protecting moisture sensitive subgrade, and acting as a separation layer to eliminate pumping and contamination of the granular subballast at saturated fine grained conditions. The objective of this paper is to evaluate the practicability of polyurethane stabilized soft and unstable subgrade under unbounded granular trackbeds to mitigate future deformation, restore railway foundation, and reduce trackbed repair cost and outage time.
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Sun, Yujie y Haibo Liu. "Study on Composite Geosynthetic-Reinforced Method of Soft Soil Subgrade". En 19th COTA International Conference of Transportation Professionals. Reston, VA: American Society of Civil Engineers, 2019. http://dx.doi.org/10.1061/9780784482292.095.

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Tang, Xiaochao, Shelley Stoffels y Angelica M. Palomino. "Mechanistic-Empirical Performance Prediction of Geogrid-Modified Soft Soil Subgrade". En Geo-Congress 2014. Reston, VA: American Society of Civil Engineers, 2014. http://dx.doi.org/10.1061/9780784413272.297.

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Zhao, Zhong-Cheng, Yao Shan, Long-Cai Yang y Li Su. "Subgrade Settlement Prediction of a Tram Track in Soft Soil Areas". En 17th COTA International Conference of Transportation Professionals. Reston, VA: American Society of Civil Engineers, 2018. http://dx.doi.org/10.1061/9780784480915.135.

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Zhang, Chunmei y Lijuan Liang. "The method to reduce the post-construction settlement of soft soil subgrade". En 5th International Conference on Advanced Design and Manufacturing Engineering. Paris, France: Atlantis Press, 2015. http://dx.doi.org/10.2991/icadme-15.2015.230.

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Abu-Farsakh, Murad, Shadi Hanandeh, Xiaochao Tang y Qiming Chen. "Sustainability Evaluation of Geosynthetic Stabilized Soft Subgrade Soil in Unpaved Test Sections". En Geo-Chicago 2016. Reston, VA: American Society of Civil Engineers, 2016. http://dx.doi.org/10.1061/9780784480137.065.

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Hasyimi, T. y S. Syahril. "Improvement of Soft Soil for Subgrade Stabilized with Emulsified Asphalt and Tailing". En 2nd International Seminar of Science and Applied Technology (ISSAT 2021). Paris, France: Atlantis Press, 2021. http://dx.doi.org/10.2991/aer.k.211106.074.

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"Discussion based on the Technology Treatment of Soft Soil Subgrade in Highway Construction". En 2020 International Conference on Computer Science and Engineering Technology. Scholar Publishing Group, 2020. http://dx.doi.org/10.38007/proceedings.0000847.

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