强度折减法在加筋土高边坡稳定分析中的应用
摘要:在边坡稳定性分析中,极限平衡法和强度折减法得到广泛应用。相比极限平衡法,强度折减法不但可以得到边坡的安全系数,而且可以得到土体塑性应变区及应力位移等结果,但对加筋土的计算则产生较大误差。分析了加筋土加筋机理,根据等效应力法将加筋土体视为一个整体,以新的黏聚力来取代原土体黏聚力,从而实现强度折减。以山西某填土高边坡为例,利用极限平衡法计算的结果去调整加筋土的等效黏聚力,对不同高度的边坡计算得到的等效黏聚力进行对比分析,发现边坡高度会对黏聚力增量产生影响,边坡越高粘聚力增量越大。有限元结果可以用来优化边坡设计,同时为加筋土的研究提供一种手段。
Abstract:In the slope stability analysis,the limit equilibrium method and strength reduction method have been widely applied;Compared with limit equilibrium method,strength reduction method not only can get the safety factor of the slope,but also the soil plastic strain,stress and displacement;However,it cannot be used to calculate the reinforced soil ideality.In this paper,through the analysis of reinforced soil reinforcement mechanism,regard the reinforced soil as a whole according to the equivalent stress method,using a new cohesion to replace the original soil cohesion,so as to realize the strength reduction method.Take a high fill slope in Shanxi as an example,it adjusts the equivalent cohesion of reinforced soil using the result from safety coefficient of limit equilibrium method,then comparative analysis the equivalent cohesion in different height slope,finding out that the slope height will have influence on the increment of cohesion,the higher of slope,the greater of the increment cohesion.The results of finite element method can be used to optimize the design of slope,and to provide a way for research reinforced soil.
中文标题：
强度折减法在加筋土高边坡稳定分析中的应用
Application of Strength Reduction Method in Reinforced Soil Slopes
作者：
许雅琦,祝启坤
XU Ya-qi,ZHU Qi-kun
作者简介:许雅琦，1990年生，女，汉族，湖北武汉人，硕士，从事边坡设计及地灾评估。E-mail:296345477@qq.com
通讯地址：
武汉工程大学资源与土木工程学院, 湖北武汉 430205
WuhanInstituteofTechnology,SchoolofResourceandCivilEngineerging,Wuhan430205,Hubei,China
中图分类号:TU472.34
doi:10.3969/j.issn.1007-2993.2015.04.007
出版物：岩土工程技术
收稿日期:2015-04-07
网络出版日期:2021-07-19
关键词:加筋土边坡,极限平衡法,强度折减法,等效黏聚力,有限元
Key words:reinforced soil slope,limit equilibrium method,shear strength reduction method,equivalent cohesive strength,finite element
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