Study On Influence Of Bolt Supporting Parameters On Slope Stability Of Integrated Pipe CorridorFoundation Pit Based On Orthogonal Test
基于正交试验的锚杆支护参数对综合管廊基坑边坡稳定性影响研究

摘要

为了研究锚杆不同支护参数对边坡稳定性的影响，选取绵阳市在建综合管廊为工程背景，基于正交试验，运用Geo-Studio有限元软件计算管廊边坡在不同锚固参数下的安全系数，选取了锚杆长度、锚杆间距和锚固角度三个因素，针对各因素对边坡稳定性的影响规律进行了分析，并且运用Matlab软件对因素间进行三次样条插值分析，结果表明：锚固参数对边坡稳定性影响从大到小依次为：锚杆长度、锚固角度、锚杆间距，边坡安全系数和锚杆长度成正比，和锚固角度以及锚杆间距成反比，基于正交试验给出了理论上安全系数最高的锚固方案；通过插值结果得到了安全系数在因素两两组合情况下对各因素敏感性的大小，并且分析了各因素间互相影响的规律，同时给出了双因素作用时的最优匹配方案。

Abstract

In order to study the influence of different bolt supporting parameters on slope stability, the integrated pipe corridor under construction in Mianyang City was selected as the engineering background. Based on orthogonal test, Geo-Studio finite element software was used to calculate the safety factor of pipe corridor slope under different anchoring parameters, and three factors including bolt length, bolt spacing and anchoring Angle were selected. The influence rule of each factor on the slope stability is analyzed, and the Matlab software is used to carry out cubic spline interpolation analysis between the factors. The results show that the influence of anchorage parameters on the slope stability is as follows: The anchoring length, anchoring Angle, anchoring distance, the slope safety factor is proportional to the anchoring length, and inversely proportional to the anchoring Angle and the anchoring distance. Based on the orthogonal test, the anchoring scheme with the highest theoretical safety factor is given. Based on the interpolation results, the sensitivity of the safety factor to each factor is obtained, and the law of the mutual influence of each factor is analyzed. At the same time, the optimal matching scheme is given when the two factors act.