摘要
Abstract
To enhance the overall stability of the composite soil nail wall support for the foundation pit under complexgeological and surrounding environmental conditions,this paper takes a certain foundation pit project in Guiyang,Guizhou as the background.By combining the strength reduction method theory with the Abaqus software,a three-dimensional finite element model is established to simulate and analyze the influence laws of key design parameters such as the length,inclination angle,and spacing of the soil nails on the deformation characteristics of the foundation pit,the distribution of soil nail axial forces,and the safety factor.The results show that as the length of the soil nail increases from 3 m to 9 m,the horizontal and vertical displacements at the slope top decrease by 42.27％and 28.10％respectively;when the inclination angle of the soil nail is 20°,the safety factor is the highest;when the spacing of the soil nail increases,the displacement increases significantly and the stability decreases.In summary,using the parameter combination of soil nail length of 9.0 m,spacing of 1.0 m,and inclination angle of 20° can significantly improve the overall stability of the support system and effectively control the development of deformation.关键词
强度折减法/复合土钉墙/基坑稳定性/安全系数/参数优化Key words
Strength reduction method/Composite soil nail wall/Foundation pit stability/Safety factor/Parameter optimization分类
建筑与水利
