摘要
为了弥补传统条分法对边坡各处土体的抗剪强度均采用极限应力状态计算方法的不足。根据边坡渐进破坏的机理,提出了分区计算的条分模型。该模型依据力学分析搜索边坡的失稳区、临界区、稳定区。针对各区域真实应力状态,计算相应的抗剪强度,分析边坡的稳定性。本研究基于分区计算模型,开发了相应的稳定性分析软件。通过理论分析和案例计算表明:分区计算比传统条分法更贴合工程实际。当边坡存在失稳区时,分区计算所得安全系数偏小;当边坡都处于稳定区时,分区计算所得安全系数与瑞典条分法一致,且该模型通过对边坡分区可更经济、有效地指导边坡加固。
The disadvantage of the traditional slices method is that the shear strength of all the soil in the slope is calculated according to the boundary state of stress.In order to address this problem,according to the mechanism of progressive failure,the partition calculation model is proposed in this paper.According to the mechanical analysis,the model searches three regions of the slope:instability region,critical region and stable region,and calculates the corresponding shear strength according to the true stress state of each region.Finally,the model analyzes the slope stability.In this paper,the stability analysis software is developed based on partition calculation model.Through theoretical and case analysis,it can be found that partition calculation model is more in line with the engineering practice.When there is instability region in the slope,the safety factor calculated by partition is smaller.When the whole slope is stable region,the safety factor calculated by partition calculation method is the same as that calculated by Fellenius simplified method.And partition calculation model can guide slope reinforcement more economically and effectively.
作者
蒋茂林
陈文胜
戴嘉宁
李颖豪
JIANG Mao-lin;CHEN Wen-sheng;DAI Jia-ning;LI Ying-hao(School of Civil Engineering,Changsha University of Science&Technology,Changsha 410114,China)
出处
《交通科学与工程》
2020年第4期54-60,68,共8页
Journal of Transport Science and Engineering
基金
国家自然科学基金(51778067)。
关键词
边坡
条分法
抗剪强度
分区计算模型
局部失稳区
slope
slices method
shear strength
partition calculation model
local instability region
