Experimental study of different shape bedrock surfaces about deformation and failure of soil and rock mixture
SUN Yongshuai1，2，HU Ruilin1
(1. Key Laboratory of Shale Gas and Geoengineering，Institute of Geology and Geophysics，Chinese Academy of Sciences， Beijing 100029，China；2. University of Chinese Academy of Sciences，Beijing 100049，China)
Abstract：Soil-rock mixture landslide is one of the most common disasters types in the mountain. The deformation and failure of landslide are usually affected by the relatively stable bedrock interface，which is called as the bedrock surface. Based on it，the test is carried out through an in-house developed large shear test for studying the influence of the different shape bedrock surface on the stability of slope. The results show that the change value of the pore water pressure and earth pressure increase firstly and then decrease. Because of the internal soil-rock structure changes and fissure changes of soil & rock mixture，the curve of the pore water pressure change value and earth pressure change value will fluctuate for some times after the maximum value. When the shape of bedrock surface is straight，the intersection angle between bedrock surface and sliding surface is smallest，the maximum shear stress is largest，it needs to take the longest time when pore water pressure change value and earth pressure change value reach the corresponding maximum value. When the shape of bedrock surface is stepped，the intersection angle between bedrock surface and sliding surface is largest，the maximum shear stress is smallest，it needs to take the shortest time when pore water pressure change value and earth pressure change value reach the corresponding maximum value.
孙永帅1，2，胡瑞林1. 土石混合体变形破坏的不同形态基覆面效应试验研究[J]. 岩石力学与工程学报, 2016, 35(S1): 2907-2914.
SUN Yongshuai1，2，HU Ruilin1. Experimental study of different shape bedrock surfaces about deformation and failure of soil and rock mixture. , 2016, 35(S1): 2907-2914.
黄润秋.结构面起伏度的定量研究[J].水文地质工程地质，1992，19(6)：6-10.(HUANG Runqiu. A quantitative study of undulations of discontinuities[J].Hydrogeology and Engineering Geology，1992，19(6)：6-10.(in Chinese))
[2]
陈红旗，黄润秋，林峰.大型堆积体边坡的空间工程效应研究[J].岩土工程学报，2005，27(3)：323-328.(CHEN Hongqi，HUANG Runqiu，LIN Feng. Study on the spatial engineering effect of large accumulation slope[J]. Chinese Journal of Geotechnical Engineering，2005，27(3)：323-328.(in Chinese))
[3]
徐文杰，胡瑞林，岳中琦，等.土石混合体细观结构及力学特性数值模拟研究[J].岩石力学与工程学报，2007，26(2)：300-311.(XU Wenjie，HU Ruilin，YUE Zhongqi，et al. Mesostructural character and numerical simulation of mechanical properties of soil-rock mixtures[J].Chinese Journal of Rock Mechanics and Engineering，2007，26(2)：300-311.(in Chinese))
[4]
MEDLEYE. Using stereological methods to estimate the volumetric proportions of blocks inmélanges and similar block-in-matrix rocks(bimrocks)[C]// Proceedingsof the7thCongress International Association of Engineering Geology. Rotterdam：Balkema，1994：1031-1040.
[5]
BRANDT J R T. Behavior of soil-concrete interfaces[Ph.D.Thesis][D].Alberta，Canada：UniversityofAlberta，1985.
[6]
HUCK P J，LIBERT T，CHIAPETTA R L，et al. Dynamic Response of soil/concrete interface at high pressure[R].WashingtonD.C.，USA：IITRI(Illinois Institute of Technical Research Institute) for Defense Nuclear Agency，1974.
[7]
POTYODY J G. Skin friction between various soil and construction materials[J].Geotechnique，1961，11(4)：339-353.
[8]
TSUBAKIHARA Y，KISHIDA H，NISHIYAMA T. Friction between cohesive soils and steel[J].Soils and Foundations，1993，33(2)：145-156.
[9]
UESUGI M，KISHIDA H. Influential factors of friction between steel and dry sands[J].Soils and Foundations，1986，26(2)：33-46.
[10]
UESUGI M，KISHIDA H. Frictional resistance at yield between dry sand and mild steel[J].Soils and Foundations，1986，26(4)：139-149.
2016, Vol. 35 
