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Автор: Grafiati
Опубліковано: 14 березня 2023

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1

Napoli, M. L., M. Barbero, D. Minuto, L. Morandi, and H. Ullah. "The relict landslide in bimsoils in downtown Genova, Italy: a new modeling approach." IOP Conference Series: Earth and Environmental Science 1124, no. 1 (January 1, 2023): 012124. http://dx.doi.org/10.1088/1755-1315/1124/1/012124.

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Abstract Stability problems occurring in geological units with a block-in-matrix fabric are often analyzed with deterministic approaches and/or assuming block-in-matrix rocks/soils (bimrocks or bimsoils) to be homogeneous equivalent geomaterials. However, recent studies have demonstrated that since these formations are characterized by a great (dimensional, spatial and lithological) variability, reliable results can only be obtained if a stochastic approach accounting for different block arrangements and dimensions is used. This paper extends and improves a previous study from Minuto and Morandi (2015) to evaluate the stability of a relict landslide in bimsoil located in downtown Genova (Italy), where a deterministic approach and the traditional limit equilibrium method were used. In this work, different slope models with elliptical blocks of variable eccentricity, size and positions are generated by means of a stochastic approach and are analyzed with the FEM code RS2. Moreover, since the slope can be considered to be a bimsoil, interfaces between the blocks and matrix are introduced in order to better simulate the lower strength at the block/matrix contacts. The numerical analyses of the slope reveal that shallow failure surfaces have a higher probability of occurrence as compared to the deep failure surfaces considered by Minuto and Morandi (2015). Furthermore, lower safety factors are obtained when a block-matrix interface strength smaller than that of the matrix (i.e., a bimsoil) is simulated.
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2

Lu, Yu-Chen, Yong-Ming Tien, Charng Hsein Juang, and Jeen-Shang Lin. "Uncertainty of volume fraction in bimrock using the scan-line method and its application in the estimation of deformability parameters." Bulletin of Engineering Geology and the Environment 79, no. 4 (December 13, 2019): 1651–68. http://dx.doi.org/10.1007/s10064-019-01635-7.

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AbstractThe volume fraction within a bimrock or bimsoil is an essential parameter that is useful for estimating the engineering properties of heterogeneous geomaterials. This paper presents analytical and numerical solutions to quantify the uncertainty of volume fraction measurements in bimrock/bimsoil using a scan-line method. The analytical solutions for the mean and variance of volume fraction estimates are based on a representative volume element model. The numerical solution is obtained through simulations of scan-line measurements. This work also employs physical tests using CT scan images from artificial bimrock/bimsoil to validate these solutions. The results demonstrate that the uncertainties of the volume fraction depend on the magnitude of the volume fraction of the blocks, the diameter of the blocks, and the length of the scan line. The proposed analytical and numerical solutions are compared with existing physical experimental tests and analytical solutions. An illustrative example to demonstrate the estimation of the uncertainty of volume fraction using the scan-line measurement is present. Finally, an example application of the volume fraction characterization in the geological engineering, in terms of Young’s modulus estimation and characterization, is provided.
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3

Ramos-Cañón, Alfonso Mariano, Lady Carolina Castro-Malaver, Nelly Vanessa Padilla-Bello, and Carlos Alberto Vega-Posada. "Incertidumbre en la determinación del Porcentaje Volumétrico de Bloques de BIMrocks/BIMsoil a partir de información unidimensional." Revista Boletín de Geología 42, no. 1 (January 1, 2020): 69–80. http://dx.doi.org/10.18273/revbol.v42n1-2020004.

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La caracterización mecánica de depósitos de materiales heterogéneos (BIMrocks/BIMsoil – Block in Matrix) requiere del conocimiento de la cantidad de bloques inmersos en una matriz débil (Proporción Volumétrica de Bloques, PVB). La aleatoriedad en el proceso de formación de dichos depósitos impide obtener información unívoca mediante estudios geotécnicos convencionales. Es posible reconocer que a medida que aumenta el número y la profundidad de las perforaciones, se disminuye la incertidumbre en la determinación de la PVB, sin embargo, la cuantificación de la disminución de la incertidumbre no ha sido abarcada de manera comprensiva. La determinación de la PVB en materiales BIMrock/BIMsoil tiene asociada una incertidumbre que se ha estudiado con modelos físicos y analíticos. Dichos modelos no consideran la influencia de factores como el tamaño, forma y orientación de los bloques, que simultáneamente inciden en la cuantificación de la incertidumbre en la PVB.En este trabajo se desarrolló un algoritmo y se implementó computacionalmente para analizar la influencia de la longitud y el número de las perforaciones, junto con la forma y orientación de los bloques, sobre el nivel de incertidumbre en la determinación de la PVB. Los resultados sugieren que a mayor investigación del subsuelo (número y longitud de perforaciones), independiente de la forma, tamaño y orientación de los bloques, se disminuye la incertidumbre epistémica en la PVB. Sin embargo, dicha incertidumbre tiene un límite inferior que obedece a la naturaleza aleatoria propia de la formación del material BIMrock/BIMsoil
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4

Wang, Yu, Yingjie Xia, Yujie Su, Hongjian Wang, and Xuefeng Yi. "Macro-meso fatigue failure characteristics of a bimsoil under multistage cyclic triaxial loads with different frequencies." Soil Dynamics and Earthquake Engineering 160 (September 2022): 107355. http://dx.doi.org/10.1016/j.soildyn.2022.107355.

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5

Wang, Y., Z. Q. Hou, and Y. Z. Hu. "In Situ X-Ray Computed Tomography Experiment on Mesodamage Evolution of Subgrade Bimsoil during Cycle Loading." Journal of Materials in Civil Engineering 31, no. 9 (September 2019): 04019198. http://dx.doi.org/10.1061/(asce)mt.1943-5533.0002796.

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6

Wang, Y., J. M. Que, C. Wang, and C. H. Li. "Three-dimensional observations of meso-structural changes in bimsoil using X-ray computed tomography (CT) under triaxial compression." Construction and Building Materials 190 (November 2018): 773–86. http://dx.doi.org/10.1016/j.conbuildmat.2018.09.098.

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7

Wang, Y., C. H. Li, and Y. Z. Hu. "3D image visualization of meso-structural changes in a bimsoil under uniaxial compression using X-ray computed tomography (CT)." Engineering Geology 248 (January 2019): 61–69. http://dx.doi.org/10.1016/j.enggeo.2018.11.004.

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8

Napoli, Maria Lia, Lorenzo Milan, Monica Barbero, and Edmund Medley. "Investigation of Virtual Bimrocks to Estimate 3D Volumetric Block Proportions from 1D Boring Measurements." Geosciences 12, no. 11 (November 4, 2022): 405. http://dx.doi.org/10.3390/geosciences12110405.

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Анотація:
Serious deficiencies in ground characterization, analysis and design at engineering works can occur when working with bimrocks (block-in-matrix rocks) and bimsoils (block-in-matrix soils). Since the 1990s, serious technical problems at engineering works performed in bimrocks/bimsoils spurred practical research, which revealed that the behavior of these geomaterials is directly related to the volumetric block proportions (VBPs). However, the way that VBPs can be confidently and correctly estimated remains an ongoing critical issue that still frustrates designers, contractors and owners. Stereological techniques can be applied to overcome this challenge by inferring 3D block contents from in situ 1D and 2D measurements, but the estimates have often been demonstrated to be erroneous. This paper presents findings from a computer-aided reinvestigation, revalidation and extension of Medley’s work of 1997 and subsequent researchers to provide approachable yet statistically robust methods to limit the uncertainty associated with estimates of 3D VBPs generated from 1D boring/scanline measurements. To this aim, a specialized Matlab code was created and virtual drilling programs were performed through 3D computer-generated bimrock models. Supported by extensive statistical-based investigations, a design chart is provided that updates and extends Medley’s 1999 chart relating uncertainty in estimates of VBP as a function of total boring/scanline lengths.
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9

Wang, Yu, Changhong Li, Xiaolong Zhou, and Xiaoming Wei. "Seepage Piping Evolution Characteristics in Bimsoils -An Experimental Study." Water 9, no. 7 (June 24, 2017): 458. http://dx.doi.org/10.3390/w9070458.

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10

Wang, Yingchao, Shunhua Zheng, Yueming Wang, and Yin Guo. "Experimental study on the permeability and seepage characteristics of bimsoils." Geomatics, Natural Hazards and Risk 12, no. 1 (January 1, 2021): 3001–20. http://dx.doi.org/10.1080/19475705.2021.1987341.

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11

Kalender, A., H. Sonmez, E. Medley, C. Tunusluoglu, and K. E. Kasapoglu. "An approach to predicting the overall strengths of unwelded bimrocks and bimsoils." Engineering Geology 183 (December 2014): 65–79. http://dx.doi.org/10.1016/j.enggeo.2014.10.007.

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12

Wang, Yu, Changhong Li, Yanzhi Hu, and Yonggang Xiao. "Optimization of Multiple Seepage Piping Parameters to Maximize the Critical Hydraulic Gradient in Bimsoils." Water 9, no. 10 (October 15, 2017): 787. http://dx.doi.org/10.3390/w9100787.

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13

Suarez-Burgoa, Ludger O., Andres Ariza-Triana, and Exneyder Montoya-Araque. "Modelamiento de estructuras de bimsoils mediante el empaquetado de partículas circulares en R^2." Revista de la Facultad de Ciencias 8, no. 2 (July 1, 2019): 115–37. http://dx.doi.org/10.15446/rev.fac.cienc.v8n2.72343.

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El presente artículo explica el algoritmo y la implementación que se plantea para generar de forma automática el empaquetamiento de círculos de diferentes diámetros que se acomodan de forma tangencial en cada triángulo de un arreglo de triángulos que cubren un polígono cerrado R^2 La manera de generar este empaquetamiento es recursivo a varios niveles de profundidad, lo que genera partículas de diferentes diámetros que tiende al modelo a ser autosimilar para el intervalo de partículas más pequeñas y se desvía para partículas grandes. Sin embargo, se logra autosimilitud en los diámetros apagando o borrando algunas partículas pequeñas. La autosimilitud así lograda es dependiente de la forma del polígono cerrado. Cuando dicho polígono cerrado representa el marco geométrico de un talud en R^2 (una forma de polígono cerrado especial y tradicional para este tipo de problemas geotécnicos) se generan partículas autosimilares para representar geomateriales compuestos por bloques de roca embebidos en una matriz de suelo (bimsoils, acrónimo del Inglés blocks--in--matrix soils). Con este modelo geométrico generado es posible analizar la estabilidad de taludes mediante el método de equilibrio límite o mediante un análisis de esfuerzo--deformación. El algoritmo y la implementación está asociados al desarrollo de un software de aplicación denominado circpacker, el cual está escrito en PYTHON3 y se lo presenta a la comunidad como un código abierto y libre.
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14

Guralnick, Eleanor. "Early Vitreous Materials. M. Bimson , I. C. Freestone." Journal of Near Eastern Studies 51, no. 1 (January 1992): 71–72. http://dx.doi.org/10.1086/373529.

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15

Schmüdderich, Christoph, Luis Felipe Prada-Sarmiento, and Torsten Wichtmann. "Numerical analyses of the 2D bearing capacity of block-in-matrix soils (bimsoils) under shallow foundations." Computers and Geotechnics 136 (August 2021): 104232. http://dx.doi.org/10.1016/j.compgeo.2021.104232.

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16

Brinks, C. L. "Who Speaks Words without Knowledge? A Response to Wilcox and Bimson." Journal for the Study of the Old Testament 35, no. 2 (December 2010): 197–207. http://dx.doi.org/10.1177/0309089210365962.

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17

Meng, H. J., Y. Wang, and J. Y. Ren. "In Situ X-Ray Computed Tomography (CT) Investigation on Localized Deformation and Crack Damage Evolution in a Bimrock by Tracking Rock Blocks." Advances in Civil Engineering 2020 (October 20, 2020): 1–14. http://dx.doi.org/10.1155/2020/8851817.

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Instability of rock mass with block-in-matrix-rocks (bimrocks) often poses a threat to the geological and ecological environment; thus, investigation of the localized deformation and crack damage evolution is critical to predict the bimrock hazards. In this work, triaxial compression testing on block-in-matrix-soils (bimsoils) with a rock block percentage of 40% (mass ratio) was performed under tomographic monitoring using an original experimental setup specially designed to match the 450 kV industrial x-ray Computerized Tomography (CT) apparatus. A series of 2D CT images were obtained by carrying out CT scanning at key points throughout the test and from different positions in the sample. The physical strain localization phenomenon was well investigated using the proposed Block Tracking Movement (BTM) method to track the trajectory of rock blocks during deformation. The distribution and morphology of cracks are strongly influenced by the interactions between the rock block and the soil matrix including the repeating contact and separation between them that finally results in the macroscopic pattern of cracking. The displacement vector analysis revealed the spatial kinematics of rock blocks during sample deformation and the associated localized band evolution, which was consistent with the macroscopic crack pattern observation. The cracks corresponding to the low-density regions in the bimrock sample further indicate the inhomogeneous pattern of localized deformation. The meso-structural changes and strain localization of the bimrock under triaxial deformation are discussed first by analyzing the rock block movement using x-ray CT data.
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18

Nurfadillah, Ni'mah, Ahmad Sarbini, and Herman Herman. "Manajemen Strategik Bimbingan Manasik Haji dalam Meningkatkan Kualitas Jemaah." Tadbir: Jurnal Manajemen Dakwah 4, no. 2 (June 30, 2019): 115–32. http://dx.doi.org/10.15575/tadbir.v4i2.1827.

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ABSTRAK Penelitian ini bertujuan untuk mengetahui manajemen strategik Bimbingan Manasik Haji KBIH Masjid Raya Bandung melalui tahapan perumusan strategi, pelaksanaan strategi dan evaluasi strategi untuk meningkatkan kualitas jemaah calon haji. Agar didapatkan data yang valid penelitian ini menggunakan metode deskriptif dengan teknik pengumpulan data wawancara, observasi, dan analisis dokumen. Hasil penelitian menunjukkan bahwa manajemen strategik Bimbingan Manasik Haji di KBIH Masjid Raya Bandung yaitu melakukan pengembangan visi, misi dan tujuan untuk menjadikan jemaah haji yang mandiri, dengan melakukan Bimsik Haji yang memfokuskan terhadap teori dan praktik. Pada pelaksanaan strategi, bimsik dilakukan semaksimal mungkin oleh para pembimbing yang ahli di bidangnya. Prosedur yang dijalankan oleh KBIH Masjid Raya Bandung dimulai dari pendaftaran sampai dengan pelaksanaan ibadah haji (bimbingan di tanah air, di Arab Saudi dan pasca ibadah haji yang dikumpulkan melalui wadah Jamiatul Hujjaj). Tahapan manajemen strategik dilakukan untuk membantu KBIH menjadikan jemaah haji berkualitas. Kata Kunci: Manajemen, Strategik, Manasik, Kualitas, Jemaah ABSTRACT This study aims to determine the strategic management of the Hajj Ritual Guidanceby KBIH Bandung Great Mosque through the stages of strategy formulation, strategy implementation and strategy evaluation to enhance the quality of prospective pilgrims. In order to obtain a valid data, this study uses descriptive methods with interview, observation and document analysistechniques for collecting the data. The results shows that the strategic management of Hajj Ritual Guidance in KBIH Masjid Raya Bandung is to develop a vision, mission and goals to make an independent pilgrims, by conducting Hajj Ritual Guidancethat focuses on theory and practice. In the implementation of the strategy, Hajj Ritual Guidance carried out as much as possible by the supervisors who are experts in their fields. The procedure that is carried out by the KBIH Bandung Great Mosque starts from registration to the implementation of the pilgrimage (guidance in the homeland, in Saudi Arabia and after the pilgrimage collected through the Jamiatul Hujjajorganisation). The stages of strategic management are carried out to help KBIH make qualified pilgrims. Keywords : Management, Strategic, Manasik, Quality, Pilgrims.
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19

Alves, Miguel, Paulo Carreira, and António Aguiar Costa. "BIMSL: A generic approach to the integration of building information models with real-time sensor data." Automation in Construction 84 (December 2017): 304–14. http://dx.doi.org/10.1016/j.autcon.2017.09.005.

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20

McCormick, Mark I. "BEHAVIORALLY INDUCED MATERNAL STRESS IN A FISH INFLUENCES PROGENY QUALITY BY A HORMONAL MECHANISM." Ecology 79, no. 6 (September 1998): 1873–83. http://dx.doi.org/10.1890/0012-9658(1998)079[1873:bimsia]2.0.co;2.

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21

Henderson, Julian. "M. Bimson& I.C. Freestone (ed.). Early vitreous materials. 191 pages, 63 figures. 1987. London: British Museum Publications. British Museum Occasional Paper 56; ISBN 0-86159-056-2 paperbackE10." Antiquity 62, no. 236 (September 1988): 613–14. http://dx.doi.org/10.1017/s0003598x00074950.

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22

Wang, Y., and C. H. Li. "Investigation of mesostructural changes in bimsoil during triaxial deformation: an insight using X-ray computed tomography and ultrasonic measurement." Arabian Journal of Geosciences 11, no. 20 (October 2018). http://dx.doi.org/10.1007/s12517-018-3989-1.

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23

Napoli, Maria Lia, Monica Barbero, and Claudio Scavia. "Effects of block shape and inclination on the stability of melange bimrocks." Bulletin of Engineering Geology and the Environment, September 18, 2021. http://dx.doi.org/10.1007/s10064-021-02419-8.

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AbstractA wide range of heterogeneous geological units composed of strong rock blocks enclosed in a bonded matrix of fine texture exists worldwide. Such geomaterials belong to geotechnically complex formations and are often referred to as bimrocks (block-in-matrix rocks) or bimsoils (block-in-matrix soils), as a function of their matrix characteristics and the interface strength between the matrix and blocks. Stability problems occurring in such complex geomaterials have been analysed almost exclusively by means of deterministic approaches and with the aim of investigating the effects of variable block contents on their mechanical behaviour. However, bimrocks and bimsoils can present very different internal block-in-matrix arrangements and properties according to their forming process and, consequently, significantly dissimilar mechanical behaviours. Therefore, the aim of this paper was to statistically investigate and compare the stability of theoretical slopes in the most widespread bimrock formations, i.e. sedimentary and tectonic melanges. These formations are characterised by substantial differences in their rock inclusion geometry. To this aim, a great number of 2D slope models were generated to enclose blocks with variable shapes, dimensions, arrangements, inclinations and contents. To obtain statistically based results, fifteen configurations were analysed for each block content and geometrical configuration considered. The results obtained indicate that block shapes and orientations significantly affect the stability of slopes in bimrocks only when the block contents are greater than 40%. Moreover, it is demonstrated that blocks inclined 0° to the horizontal provide the most tortuous and irregular failure surfaces and, consequently, the highest safety factors.
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24

"Laboratory Investigation of the Effect of Slenderness Effect on the Non-Darcy Groundwater Flow Characteristics in Bimsoils." Water 9, no. 9 (September 7, 2017): 676. http://dx.doi.org/10.3390/w9090676.

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25

Wang, Y., C. H. Li, and Z. Q. Hou. "Mechanical behaviors of bimsoils during triaxial deformation revealed using real-time ultrasonic detection and post-test CT image analysis." Arabian Journal of Geosciences 12, no. 1 (December 28, 2018). http://dx.doi.org/10.1007/s12517-018-4179-x.

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26

Wang, Y., W. K. Feng, C. H. Li, and Z. Q. Hou. "An investigation into the effects of block size on the mechanical behaviors of bimsoils using variable-angle shear experiments." Environmental Earth Sciences 79, no. 3 (January 21, 2020). http://dx.doi.org/10.1007/s12665-020-8812-0.

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