岩土力学2023，Vol.44Issue(11)：3272-3279,3287,9.DOI:10.16285/j.rsm.2023.0469
沿缓倾软弱外倾结构面滑动的主动岩石压力计算
Calculation of active rock pressure for slope sliding along weak outward inclined structural plane
摘要
Abstract
In the current code,the Eak formula for active rock pressure of slopes sliding along gently inclined outward weak structural planes does not consider the water pressure of the trailing edge fractures,which leads to deviation in Eak calculation.In view of this problem,according to the balance relationship and geometric conditions of the force system,the stress analysis and simplification are carried out considering the water pressure of the trailing edge crack,and the calculation formula of the active rock pressure is derived to determine whether there is an extreme point and its location.The research results show that the error of Eak is 21.89％-100％without considering water pressure;Eak has a maximum in the effective range.The dip angle of gently inclined rock stratum θ and the friction angle in the structural plane φ are compared,it is found that if θ＞φ,the width of potential slip surface at the top of slope is generally 0.2-1.2 times of the slope height H;and ifθ≤φ,the maximum value of Eak appears on the slope.This study improves the calculation formula by classification,and analyses the correlation between the extreme point position and some factors including H.It is of theoretical and practical significance for the prevention and control of sliding slope along gently inclined soft outward inclined structural plane.关键词
缓倾/软弱外倾结构面/主动岩石压力/裂隙水压力Key words
gently inclined/weak outward inclined structural plane/active rock pressure/fissure water pressure分类
建筑与水利引用本文复制引用
陈柏林,杨文君,谢强,彭海游,叶晓明,檀康,周鹏..沿缓倾软弱外倾结构面滑动的主动岩石压力计算[J].岩土力学,2023,44(11):3272-3279,3287,9.基金项目
重庆市自然科学基金面上项目(No.CSTB2022NSCQ-MSX1466) （No.CSTB2022NSCQ-MSX1466）
重庆市规划和自然资源局科技项目(No.KJ-2022029).This work was supported by the General Program of Chongqing Natural Science Foundation of China(CSTB2022NSCQ-MSX1466)and the Science and Technology Project of Chongqing Municipal Planning and Natural Resources Bureau of China(KJ-2022029). （No.KJ-2022029）
