Mechanism and model for deformation of bank slope with slightly inclined soil layers in Fengjie County of Three Gorges
QI Shengwen 1, WU Faquan 1, CHANG Zhonghua 1, LIU Haiyan 1, SI Weibing 2
1.Key Lab of Engineering Geomechanics Institute of Geology and Geophysics Chinese Academy of Sciences Beijing 100029 China 2.No.1 Institute of Geology Mineral Deposits Exploration of Shandong Province Jinan 250014 China
Abstract：Many explanations were proposed for the deformation mode of the bank slope.The geological background of Three Gorges was introduced generally at first,and then the unique deformation phenomenon of the slope was serib.Through comprehensive study,it was pointed out that the unique deformation mode of the slope was controlled by the unique structure of the slope.The slope consisted of nearly horizontal layer,with soft layer and hard layer interbedded and perpendicular joints well developed.The strata outcropped in the slope were the second formation and the third formation of Badong group,which belong to middle Triassic system(T).The second formation of Badong group(T2b2) was purplish-red mudstone,which was vulnerable to weather and disintegration,and the third formation of Badong group was brittle and vulnerablion to dissolution.These characteristics of the strata led to deeply remoulding of the structure of the rock mass in the slope,and induced collapse of the structure of the rock mass.Thus,the slope took on some phenomena like slide or slump,and made the deformation mode of the slope complicated.
祁生文；伍法权；常中华；刘海燕；司维兵；. 三峡地区奉节县城缓倾层状岸坡变形破坏模式及成因机制[J]. 岩土工程学报, 2006, 28(1): 88-91.
QI Shengwen 1, WU Faquan 1, CHANG Zhonghua 1, LIU Haiyan 1, SI Weibing 2. Mechanism and model for deformation of bank slope with slightly inclined soil layers in Fengjie County of Three Gorges. Chinese J. Geot. Eng., 2006, 28(1): 88-91.
