采空区残余倾斜变形对路基稳定性的影响分析与评价

Evaluation and Analysis of Subgrade Stability for Residual Inclination in Mining Subsidence Area

摘要:

地下开采导致的地表残余倾斜对采空区公路路基的稳定性有重要影响。针对采空区公路路基的稳定性评价，笔者提出了基于概率积分法和Knothe时间函数的地表残余倾斜的计算方法，分析了路基稳定性的条分法计算原理及残余倾斜对路基稳定性的影响机理，推导了基于解析法的路基最不利滑动面计算公式，使用C#语言编制了路基稳定性系数计算软件，并通过工程实例，对提出的方法和软件进行了验证，分析了地表残余倾斜、路基边坡坡率对路基稳定性的影响。

Abstract:

Surface residual inclination caused by underground mining has an important impact on the stability of highway roadbed. In this paper, aiming at the problem of stability evaluation of highway subgrade, a method of calculating surface residual inclination based on probability integral method and Knothe time function has been put forward, the principle of subgrade stability calculation by slice method and the mechanism of residual inclination affecting subgrade stability has been analyzed, the formula of calculating the most disadvantageous sliding surface of subgrade based on analytical method has been conducted, and compiles subgrade with C# language and the stability coefficient calculation software has been realized. This method and software have been verified by an engineering example, and the effects of residual inclination and slope ratio of subgrade slope on subgrade stability have been analyzed.