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地震作用下加筋土边坡滑裂面的确定方法
引用本文:蒋薇,苏谦,张晓曦,周珩. 地震作用下加筋土边坡滑裂面的确定方法[J]. 西南交通大学学报, 2015, 28(1): 156-160. DOI: 10.3969/j.issn.0258-2724.2015.01.023
作者姓名:蒋薇  苏谦  张晓曦  周珩
作者单位:西南交通大学土木工程学院
基金项目:教育部高等学校博士学科点专项科研基金资助项目(20100184110016)
摘    要:为合理确定加筋土边坡滑裂面的位置,基于极限平衡理论,提出了地震荷载作用下加筋土边坡滑裂面确定的水平条分法.该方法假定边坡滑裂面是由若干水平滑块组成的复合滑裂面.根据地震作用下加筋土边坡的力学平衡条件,导出了与滑裂面参数有关的加筋土拉力的计算式;利用Mathematics求解,得到了加筋土边坡滑裂面的形状和加筋拉力.为验证方法的正确性,与现有方法确定的边坡临界滑裂面进行了比较,结果表明:边坡坡角越大,水平条分法与现有方法获得的边坡潜在滑裂面越接近;随内摩擦角和黏聚力增大,加筋土边坡滑裂面向坡体外侧移动,随地震加速度系数增大则向坡体内侧移动. 

关 键 词:加筋土边坡   水平条分法   地震荷载
收稿时间:2013-10-18

Determination Method of Slip Surface of Reinforced Soil Slope Subjected to Seismic Load
JIANG Wei;SU Qian;ZHANG Xiaoxi;ZHOU Heng. Determination Method of Slip Surface of Reinforced Soil Slope Subjected to Seismic Load[J]. Journal of Southwest Jiaotong University, 2015, 28(1): 156-160. DOI: 10.3969/j.issn.0258-2724.2015.01.023
Authors:JIANG Wei  SU Qian  ZHANG Xiaoxi  ZHOU Heng
Affiliation:JIANG Wei;SU Qian;ZHANG Xiaoxi;ZHOU Heng;School of Civil Engineering,Southwest Jiaotong University;
Abstract:In order to reasonably determinate the position of slip surface of a reinforced soil slope, a method, a horizontal slice method, was proposed for reinforced soil slopes subjected to seismic loads on the basis of the limit equilibrium theory. In this method, the slip surface is assumed to be a composite linear surface. The expression of reinforced soil tension, a multivariate function related to slip surface parameters, was derived based on the force equilibrium conditions of reinforced soil slopes, and solved with the software Mathematics to obtain the slip surface and the reinforced soil tension. In addition, slip surfaces obtained with the proposed method and the existing methods were compared to show its correctness. The research results show that the steeper the slope angle is, the closer the positions of potential slip surfaces based on the proposed method and the existing methods are. The slip surface moves outward constantly with the increases of internal friction angle and cohesion as well as with the reduction of horizontal seismic acceleration coefficient. 
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