المؤلفون: Wu, Qiong, Qin, Yue, Tang, Huiming^{Aff1, IDs1144002402332w_cor3}, Meng, Zhen, Li, Changdong, Lu, Sha

المصدر: Acta Geotechnica. :1-23

المؤلفون: Harabinova, Slavka, Panulinova, Eva, Kormanikova, Eva

المصدر: AIP Conference Proceedings; 2024, Vol. 3094 Issue 1, p1-4, 4p

مصطلحات موضوعية: EMBANKMENTS, SLOPE stability, SOILS, PREDICTION models, FINITE element method, ROCK slopes

مستخلص: The paper presents the modelling and assessment of a road embankment body after different construction phases using the finite element method (FEM) and the limit equilibrium method (LEM) for slope stability assessment. Different material models of soil (Mohr-Coulomb, Modified Mohr-Coulomb and Drucker-Prager) were used for modelling and assessment by FEM method. The deformation of the subsoil and the embankment was determined for each construction phases and the stability of the embankment slopes was assessed. The results obtained were compared with respect to the soil material model used as well as with respect to the calculation method used. In conclusion, it was found that it is more appropriate to use non-linear material models for stability calculations. [ABSTRACT FROM AUTHOR]

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المؤلفون: Susilowati, Indrawan, I. Gde Budi, Warmada, I. Wayan

المصدر: AIP Conference Proceedings; 2024, Vol. 2891 Issue 1, p1-10, 10p

مصطلحات موضوعية: SLOPE stability, ROCK slopes, SAFETY factor in engineering, GEOLOGICAL mapping, WATER table, GEOLOGICAL surveys

مستخلص: Geological and geotechnical assessments play a significant role in geotechnical work and slope stability analysis. This study aimed to assess the stability conditions of the proposed road cut along the Ayah-Jladri section, Kebumen, Central Java, using parameters from the geological and geotechnical survey. The parameters were defined through geological mapping on a scale of 1:25.000 and measurement of the depth of the water table, the weathering grade, estimated UCS value, and GSI value. Besides, the input parameters during the computation were obtained from laboratory test results, such as value UCS and unit density, and using the strength behavior of a rock mass approach. The slope stability assessment was performed based on deterministic analysis by the limit equilibrium method (LEM) of Morgenstern & Price assuming a seismic load of the study area is 0.196. The results showed that the slope composed of sparitic limestones with slightly weathered (73.62 MPa) has a safety factor 7.314 using circular slip surface and 6.461 using non circular slip surface, which means the slope is very safe. While, the andesitic lava that is undergoing moderate weathering near the surface (13.59-138.16 MPa) has a safety factor 1.095 using circular slip surface and 1.556 using non circular slip surface, which means the slope failure will occur through the circular slip surface. Based on the above results, it is inferred that the weathering condition that affects the activity of swelling clay minerals has a great effect on the stability conditions of the study area. There are two recommendations to improve the stability of the unstable slope: 1) change the geometry of slope to get a gentler overall slope angle in the weathered andesite zone and 2) added two supports on each bench in the weathered andesite zone. [ABSTRACT FROM AUTHOR]

: Copyright of AIP Conference Proceedings is the property of American Institute of Physics and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

المؤلفون: Anggraini, Vivi, Heng, Samuel Yap Wei

المصدر: AIP Conference Proceedings; 2024, Vol. 2891 Issue 1, p1-14, 14p

مصطلحات موضوعية: ROCK slopes, BUILDING sites, SLOPE stability, SPATIAL orientation, PHOTOGRAMMETRY, GEOLOGICAL modeling, ARCH dams

مصطلحات جغرافية: SABAH

مستخلص: This paper outlines the application of structure from motion (SfM) photogrammetry technique with the use of smartphone camera to acquire a three-dimensional (3D) rock slope surface model to perform kinematic analysis and slope stability analysis. The location of the study slope is in a construction site at Jalan Inanam, Sabah. Total of 63 images of the study slope were used to construct the slope geometry and geological mapping was carried out on it to measure the spatial orientations of the discontinuity planes. These orientations were imported into Rocscience Dips to perform kinematic analysis, while the geometry was imported into Rocscience RS3 to perform finite element rock slope stability analysis. The results show that majority of the slope regions will likely experience wedge sliding and flexural toppling failure. The weakest rock region is on the crest of middle region of the rock slope with a factor of safety of 0.48 and total maximum displacement of 0.56mm. The rock region is subjected to possible flexural toppling failure. The results obtained shows that SfM photogrammetry is competent to simulate the slope geometry which accurately resembles the actual slope. The spatial orientations measured using ShapeMetrix3D are deemed to be reliable to use for kinematic analysis. Furthermore, slope stability analysis using RS3 and RS2 is able to accurately determine the factor of safety of the potential failure rock slope surface. [ABSTRACT FROM AUTHOR]

: Copyright of AIP Conference Proceedings is the property of American Institute of Physics and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

المؤلفون: Zhang, Bocheng, Tang, Huiming^{Aff1, Aff2, IDs00603023036334_cor2}, Fang, Kun, Ding, Bingdong, Gong, Qihang

المصدر: Rock Mechanics and Rock Engineering. 57(4):2933-2960

المؤلفون: Li, Dejian, Fu, Junwen, Li, Hekai, Cheng, Xiao^{Aff2, IDs1162902381925_cor4}, Zhao, Lianheng^{Aff3, IDs1162902381925_cor5}, Zhang, Yingbin, Peng, Xinyan

المصدر: Journal of Mountain Science. 21(3):1019-1035

المؤلفون: Zhang, Bocheng, Tang, Huiming^{Aff1, Aff2, IDs00603023036254_cor2}, Sumi, Siddiqua, Ding, Bingdong, Zhang, Long, Ning, Yibing

المصدر: Rock Mechanics and Rock Engineering. 57(3):1603-1628

المؤلفون: Low, Bak Kong^{Aff1, Aff2, IDs00603023036076_cor1}, Boon, Chia Weng

المصدر: Rock Mechanics and Rock Engineering. 57(2):1195-1217

المؤلفون: Jiang, Zhenni, Wang, Jiao, Zhou, Liqin, Yuan, Runjie, Wei, Tao, Zhang, Yifan

المصدر: Landslides; Jul2024, Vol. 21 Issue 7, p1515-1530, 16p

مصطلحات موضوعية: DEBRIS avalanches, ARID regions, WENCHUAN Earthquake, China, 2008, MASS-wasting (Geology), SNOW cover, EMERGENCY management, SLOPE stability, ROCK slopes

مصطلحات جغرافية: TIBETAN Plateau

مستخلص: Debris flows can develop into mega catastrophes in semi-arid regions when the source materials come from landslides, and both snowmelt and precipitation are involved in increasing water discharge. In such environments, the formation of large-scale debris flows exhibits a distinguishable pattern, in which a multi-fold lower triggering rainfall threshold holds compared to humid regions. Previous research mainly focuses on mechanisms in humid environments or neglects variations across aridity classes. In this study, the formation and evolutionary mechanism of a debris flow occurring in a semi-arid context is investigated via field surveys, granularity measurement, terrain and climate analyses, and snow cover change detection. By examining the July 22, 2021, Xiao Dongsuo debris flow at Amidongsuo Park in the Qilian Ranges on the northeastern margin of the Tibetan Plateau, the mechanism of debris flows in semi-arid regions is revealed. The research finds that the large debris flow, whose course erosion scales up the disaster by 0.12 million m³, is primarily supplied by landslide deposits of 1.16 million m³. The debris flow is empowered by the integrated flow of extreme precipitation and extreme heat-stimulated snowmelt. However, the precipitation required to trigger the debris flow is much lower than that of precipitation-dominated ones and those in humid regions. In semi-arid mountains, prolonged extreme heat tends to increase soil moisture in areas covered by snow or permafrost. This reduces slope stability and induces slope failures, amplifying the disaster magnitude and raising disaster risks through extended deterioration. Hence, this study inspects the failure mechanism associated with debris flows in semi-arid regions for a more comprehensive understanding to constitute viable control plans for analogous disasters. [ABSTRACT FROM AUTHOR]

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المؤلفون: Jin, Leilei, Ju, Guanghong, Chen, Zhengfeng, Xiao, Qianfeng, Fu, Wenxi, Ye, Fei, Wei, Yufeng

المصدر: Landslides; Jul2024, Vol. 21 Issue 7, p1617-1627, 11p

مصطلحات موضوعية: ROCK slopes, LANDSLIDES, ANALYTICAL solutions, EARTHQUAKES, ROCK deformation, FIELD research

مستخلص: Slip-buckling failure is a common occurrence in bedding rock slopes, and it can be triggered by long-term gravitational stress, earthquakes, top loading and intense rainfall. In this paper, an analytical solution is proposed to address the slip-buckling failure of bedding rock slopes under the influences of top loading and earthquakes based on mechanical analysis and energy equilibrium theory. The rock layers of bedding slopes are treated as inclined plate beams with hinge support at the slope top and fixed support at the slope toe. The equation for the deflection curve of each rock column of the bedding rock slope under earthquake and top loading can be derived by analysing the forces acting on each rock layer. According to the energy equilibrium theory, the deformation energy of the rock column equals the work done by external forces, from which the critical length of a slope rock layer for slip-buckling failure can be determined. The location of the toe of the rupture surface, where slip-buckling failure occurs, corresponds to the point of maximum deflection on the deflection curve of the rock layer. Clearly, the location of the toe of the rupture surface is where the first derivative of the deflection curve equation equals zero. This approach has been applied to the Hejia landslide and Tangjiashan earthquake-triggered landslide, and the calculation results are in good agreement with the field investigation results. [ABSTRACT FROM AUTHOR]

: Copyright of Landslides is the property of Springer Nature and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)