地下水渗流作用下土坡稳定性的简化Bishop法解  

Solution for stability of soil slopes subjected to seepage of groundwater via simplified Bishop Method

作　　者：卢玉林[1] 陈晓冉[1] 

机构地区：[1]防灾科技学院防灾工程系,北京101601

出　　处：《应用力学学报》2018年第3期524-529,共6页Chinese Journal of Applied Mechanics

基　　金：中央高校基本科研业务费专项基金项目(ZY20180207);地震科技星火计划项目(XH17064)

摘　　要：渗流是影响边坡稳定的重要因素之一,研究渗流作用下的边坡稳定性具有重要意义。假设地下水产生的浸润线为抛物线形式,从而获得滑动面上渗流孔隙水压力的解析式。在此基础上,基于极限平衡理论推导了渗流作用下土质边坡安全系数的简化Bishop法计算式,利用数学积分实现数值解析。与典型算例对比表明,本文方法的结果比传统瑞典条分法给出的结果高约7.5%。本文给出了一种边坡稳定性分析的参考方法,该方法可配合其他方法共同完成对含有地下水渗流边坡的稳定性分析。Seepage is an important factor that affects the stability of slope, so it is of great significance to study the stability of the slope under the seepage. The phreatic water infiltration line is assumed as a standard parabolic profile, and then analytical solution of the pore water pressure on sliding surface is obtained. Based on the limit equilibrium theory, a simplified Bishop method for the stability analysis of soil slope under seepage is derived, and the numerical analysis is conducted by using the mathematical integral method. Taking some typical systems as example, the results show about 7.5% higher than that obtained by the Swedish slice method, and the results via the new method are more closer to the true stability of slope. In this study a new method to analyze the stability of slope with groundwater seepage is proposed, and it provides a reference for further study of slope instability caused by seepage.

关 键 词：地下水渗流 边坡稳定性 数学积分 简化BISHOP法 解析计算 

分 类 号：TU43[建筑科学—岩土工程]