均质土坡稳定性分析的图解法探究  

The Exploretion about the Graphical Method to Determine the Slope Stability Safety Coefficient

作　　者：孙树林[1] 秦鲜玮 朱明杰[1] 时冬冬[1] 

机构地区：[1]河海大学地球科学与工程学院,南京210098

出　　处：《科学技术与工程》2015年第8期214-218,共5页Science Technology and Engineering

摘　　要：在边坡稳定性分析中,极限平衡方法是以安全系数Fs作为判别标准,而现有确定安全系数的方法需要复杂的迭代计算,不能快速地确定不同工况的安全系数。基于极限平衡Spencer法与有限元的强度折减法,建立一种快速的初步确定边坡稳定性安全系数的方法,该方法可以弥补计算复杂和判断失准的缺点。首先,在考虑天然条件、地下水条件和地震烈度等主要因素情况下,利用计算机中的Spencer(1967)边坡稳定性分析程序中的切片编码方法,得到非线性破坏包络线稳定性分析图,对非线性边坡破坏包络线进行了详细分析。其次,通过试验数据,分析地震烈度、孔隙水压力系数等对安全系数的影响。结果表明,利用非线性破坏包络线建立的稳定分析图能快速准确地确立边坡的安全系数。In the slope stability analysis,limit equilibrium method is based on the safety factor as the judgment standard,and nowadays the method to determine the safety coefficient need complex iterative calculation which can＇t quickly to determine the safety coefficient in the different current situation of engineering. Based on the Spencer method of limit equilibrium and shear strength reduction finite element method（ SSR-FEM）,a method is establised which can make up for the disadvantages of computational complexity and judgment phrase to determine the slope stability safety coefficient rapidly and preliminarily. Firstly,considering main factors such as the natural conditions,groundwater conditions and earthquake intensity,the study use a slice coding method in the computer Spencer＇s slope stability analysis program,building the charts of the nonlinear failure envelops and the nonlinear failure envelops are analyzed in detail. Secondly,based on the test datas,the influence of earthquake intensity,coeffient of pore water pressure and etc. are analysed to the safety factor. The results show that the the stability charts which established by the nonlinear failure envelopes can rapidly and accurately establish the safety factor of the slope.

关 键 词：边坡稳定性 稳定性图解法 切片编码方法 非线性破坏包络线 

分 类 号：TU443[建筑科学—岩土工程]