边坡稳定性分析Spencer法的改进
摘要:基于经典土压力理论确定土条推力线位置,由力矩平衡方程可得土条间侧向作用力合力间的关系,考虑当土条宽度足够小时端点土条侧向作用力合力平行于该土条顶面的条件,结合边界条件求解得到中间段土条作用力合力Pi及其与水平方向夹角θ,代入安全系数定义式中进而求解得到安全系数值。该法从设定合理土条推力线位置出发求解θ,消除了Spencer法对θ假定的盲目性和复杂性,通过对端部土条θ值的固定,使得计算结果更接近于真实解。经算例验证,该法具有计算简单、可靠性强等优点。
Abstract:Based on the classical earth pressure theory to set the thrust line of soil article, the relationship between the lateral interaction force of soil article can be derived from the torque balance equation, consider the conditions which the lateral force of the first and the end soil article parallel to the top when the soil article is small enough, combined with the boundary conditions for solving the "Pi" and "θ", substituting them into the definition of the safety factor to obtianed the safety factor. The law solving the "θ" starting from setting a reasonable thrust line, eliminating the blindness and complexity of the Spencer method to assumes the "θ",to fix the "θ" of the first and the end soil article, making the results closer to the real solu tion. Examples show that the method is simple in calculation, reliability and has other advantages.
中文标题：
边坡稳定性分析Spencer法的改进
The Improvement of Spencer Method on Slope Stability Analysis
作者：
刘秀军
Liu Xiujun
作者简介:刘秀军,男,1983年生,汉族,山西临汾人,硕士,工程师,主要从事岩土检测、地基处理及边坡工程方面的研究工作。E-mail:liuxiujun01@163.com
通讯地址：
中冶建筑研究总院(深圳)有限公司, 广东深圳 518054
CentralResearchInstituteofBuildingandConstruction(Shenzhen)Co.,Ltd,Shenzhen518054,Guangdong,China
中图分类号:TU441.35
doi:10.3969/j.issn.1007-2993.2016.04.006
出版物：岩土工程技术
收稿日期:2016-01-07
关键词:边坡稳定性,Spencer法改进,经典土压力理论,安全系数
Key words:slope stability,improvement of Spencer method,classical earth pressure theory,safety factor
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