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浅析山地建筑物边坡稳定性分析方法及研究 被引量:3
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作者 刘家军 《四川水力发电》 2015年第3期77-80,共4页
以坡地建筑物边坡变形破坏机理为切入点,探讨了坡地建筑物边坡稳定性分析方法和内容以及影响因素,并进一步探讨了边坡变形的破坏模式以及判定准则,结合工程处理案例,按照所探讨的边坡稳定性分析方法、变形破坏模式、变形破坏判据等得出... 以坡地建筑物边坡变形破坏机理为切入点,探讨了坡地建筑物边坡稳定性分析方法和内容以及影响因素,并进一步探讨了边坡变形的破坏模式以及判定准则,结合工程处理案例,按照所探讨的边坡稳定性分析方法、变形破坏模式、变形破坏判据等得出某坡地建筑物的边坡是以平面滑动及楔形体滑动的破坏模式为主,并根据边坡稳定性分析结果,提出了山地建筑物设计应当注意的事项。 展开更多
关键词 坡地边坡 稳定性分析 破坏模式及判据 处理措施
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Predicting the Rainfall-Triggered Landslides in a Forested Mountain Region Using TRIGRS Model 被引量:10
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作者 Dongyeob KIM Sangjun IM +2 位作者 Sang Ho LEE Youngjoo HONG Kyung-Sub CHA 《Journal of Mountain Science》 SCIE CSCD 2010年第1期83-91,共9页
Landslides are natural disasters which can pose a serious threat to human and property in many areas around the world. The Transient Rainfall Infiltration and Grid-based Regional Slope-stability (TRIGRS) model was use... Landslides are natural disasters which can pose a serious threat to human and property in many areas around the world. The Transient Rainfall Infiltration and Grid-based Regional Slope-stability (TRIGRS) model was used to investigate the rainfall-induced shallow landslides in a forested mountain region, Korea. Various input data for TRIGRS model include time-varying rainfall, topographic characteristics, soil depth, material strength, and hydraulic properties. A series of calculations were conducted in determining the slope stability over the Jangheung region in Korea during the storm occurred on August 6, 1998. The results show that TRIGRS model captured about 64.1% of landslides that were extracted from the IKONOS2 imageries. The model demonstrated how the factor of safety changed with time during a storm considering both the transient and spatial responses of pore water pressure in its slope stability calculation. 展开更多
关键词 TRIGRS LANDSLIDES IKONOS2 safetyfactor slope stability Korea
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Variation of cavity gas pressure in slopes with weak intercalation under seismic load
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作者 WANG Xiao-qun CHEN Zhen-lin +1 位作者 ZHOU Zhou SHEN Man 《Journal of Mountain Science》 SCIE CSCD 2016年第2期352-360,共9页
This study discussed how cavity gas pressure affects the stability of rock mass with fractures under well controlled laboratory experiments.Suddenly-created void space created and the induced gas pressures have been t... This study discussed how cavity gas pressure affects the stability of rock mass with fractures under well controlled laboratory experiments.Suddenly-created void space created and the induced gas pressures have been the focus of active researches because they are associated with fast movement of large-scale landslides.A shaking table experiment was set up to mimic weak-intercalated rock slope under seismic loads.Excessive cavity gas pressure would be produced in weak spots upon a sudden vibration load.The drastically elevated gas pressure is believed to be responsible for the creation of cavities surrounding the tension fracture.With dissipation of the excessive cavity gas pressure,the fractures are in unbounded closed-state.This observation explains that the slope body would be split and loosened under several aftershocks,and with the expanding of the cracks,the slope failure eventually occurred.The research of the mechanism of cavity gas pressure could provide a novel insight into the formation mechanism of landslides under seismic load and has implications for the disaster prevention and control theory for the slope stability evaluation. 展开更多
关键词 LANDSLIDE FRACTURE Deformation Weak intercalation Cavity gas pressure
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Landslides and Slope Fissures Triggered by the April 14,2010 Yushu Earthquake, China 被引量:4
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作者 Xu Chong Xu Xiwei Yu Guihua 《Earthquake Research in China》 2013年第1期1-22,共22页
On April 14, 2010 at 07:49 (Beijing time), a catastrophic earthquake with Ms 7. 1 occurred at the central Qinghai-Tibetan Plateau. The epicenter was located at Yushu county, Qinghai Province, China. A total of 2036... On April 14, 2010 at 07:49 (Beijing time), a catastrophic earthquake with Ms 7. 1 occurred at the central Qinghai-Tibetan Plateau. The epicenter was located at Yushu county, Qinghai Province, China. A total of 2036 landslides were determined from visual interpretation of aerial photographs and high resolution remote sensing images, and verified by selected field investigations. These landslides covered a total area of about 1. 194km~. Characteristics and failure mechanisms of these landslides are listed in this paper, including the fact that the spatial distribution of these landslides is controlled by co- seismic main surface fault ruptures. Most of the landslides were small scale, causing rather less hazards, and often occurring close to each other. The landslides were of various types, including mainly disrupted landslides and rock falls in shallows and also deep-seated landslides, liquefaction induced landslides, and compound landslides. In addition to strong ground shaking, which is the direct landslide triggering factor, geological, topographical, and human activity also have impact on the occurrence of earthquake triggered landslides. In this paper, five types of failure mechanisms related to the landslides are presented, namely, the excavated toes of slopes accompanied by strong ground shaking; surface water infiltration accompanied by strong ground shaking; co- seismic fault slipping accompanied by strong ground shaking; only strong ground shaking; and delayed occurrence of landslides due to snow melt or rainfall infiltration at sites where slopes were weakened by co-seismic ground shaking. Besides the main co-seismic surface ruptures, slope fissures were also delineated from visual interpretation of aerial photographs in high resolution. A total of 4814 slope fissures, with a total length up to 77. lkm, were finally mapped. These slope fissures are mainly distributed on the slopes located at the southeastern end of the main co-seismic surface rupture zone, an area subject to strong compression during the earthquake. 展开更多
关键词 Landslides triggered by the Yushu earthquake Spatial distribution Failure mechanism Slope fissure
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Numerical simulation study of the influence on stability of slope by underground mining under opencast coal mine slope 被引量:2
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作者 LIU Ting-ting LU Guo-bin TONG Li-ming 《Journal of Coal Science & Engineering(China)》 2011年第4期397-400,共4页
In view of the study on mining transferred from open-pit to underground, the research on the problem of the stabil- ity of slope is less. This article combined the actual situation of the Gaohai Coal Mine in Fuxin Cit... In view of the study on mining transferred from open-pit to underground, the research on the problem of the stabil- ity of slope is less. This article combined the actual situation of the Gaohai Coal Mine in Fuxin City and set up a three-dimensional model of the part of Huizhou open-pit slope by the finite difference software. Through the three-dimensional numerical simulation study of the influence on the stability of slope by underground mining, the basic characteristics of the open-pit slope deformation and the situation of basic stability were discussed. The simulation results of the mining slope of the displacement and deformation analysis of the state for mining provide a reference to the slope stability research. 展开更多
关键词 numerical simulation slope stability open-pit mine pit mining
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Experimental study of motion characteristics of rock slopes with weak intercalation under seismic excitation 被引量:8
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作者 CHEN Zhen-Lin HU Xiao XU Qiang 《Journal of Mountain Science》 SCIE CSCD 2016年第3期546-556,共11页
In order to investigate the effect of a weak intercalation on slope stability, a large-scale shaking table model test was conducted to study the dynamic response of rock slope models with weak intercalation.The dynami... In order to investigate the effect of a weak intercalation on slope stability, a large-scale shaking table model test was conducted to study the dynamic response of rock slope models with weak intercalation.The dynamic response of the prototype slopes were studied in laboratory with the consideration of law of similitude. The initiation failure was observed in the rock slope model with a counter-tilt thin-weak intercalation firstly, not in the slope model with a horizontal thin-weak intercalation. Furthermore, it was interesting that the fracture site is shifted from crest top to the slope surface near the weak intercalation, which is different with the location of failure position in a normal layered slope. We also discussed the effect of the dip angle and the thickness of weak intercalation on the failure mechanism and instability mode of the layered rock slope. From the experimental result, it was noted that the stability of the slope with a counter-tilt weak intercalation could be worse than that of the other slopes under seismic excitation. The findings showed the difference of failure in slopes with a horizontal and counter weak intercalation, and implicated the further evaluation of failure of layered slopes caused by seismic loads. 展开更多
关键词 Counter-tilt Rock slope Weak intercalation Dynamic response Failure mechanism
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Effects of Moisture Content on Cyclic Shear Properties of Soils during Epicentral Earthquakes
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作者 Hirofumi Toyota Ayaka Susami Susumu Takada 《Journal of Civil Engineering and Architecture》 2011年第12期1091-1102,共12页
Numerous landslides occurred in hilly and mountainous areas during the 2004 Niigata-ken Chuetsu Earthquake. Social problems developed when many towns became isolated because landslides cut offtraffic and public servic... Numerous landslides occurred in hilly and mountainous areas during the 2004 Niigata-ken Chuetsu Earthquake. Social problems developed when many towns became isolated because landslides cut offtraffic and public service lifelines. The hilly areas are composed mainly alternate layer of soft sandstone and mudstone deposited in quaternary or tertiary period. This geomorphology formed by folding presents a prominent landslide area in this region. This area has been utilized as rice terraces or carp breeding ponds because of plenty of water in the ground all the time. In addition, there was rainfall of more than 100 mm caused by Typhoon No. 23 two days before the earthquake in Chuetsu area. Block samples were extracted from the failure sites. The samples obtained were mainly low-cemented sandy soils. Triaxial tests of the samples under saturated and unsaturated conditions were conducted to examine the soils' strength properties and estimate the indices for slope stability. 展开更多
关键词 Triaxial test unsaturated soil LANDSLIDE site investigation GEOLOGY
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