水文地质工程地质2012，Vol.39Issue(4)：38-42,5.
基于双剪强度理论土拱效应的基坑支护桩间距分析
Analysis of the spacing between retaining piles based on twin shear strength theory soil arching effect in pit
摘要
Abstract
Based on nalysis of the formation mechanism of the soil arching effect and according to the geometrical features of rational arch line and the failure surface of soil at the edge of arch foot, the calculation model of parabolic soil arching is put forward for a circular pile. The static equilibrium equation and twin shear strength theory are utilized to determine spacing between piles respectively. The rational calculation formula of spacing between piles is obtained. The calculation results show that the spacing between piles increases with the increasing cohesion or internal friction angle of soil behind piles and decreases with increasing active earth pressure behind piles or parameter m. Furthermore, the active earth pressure increases with the increasing parameter m. Through calculation of the practical project, the calculation results of twin shear strength theory soil arching effect are compared to those of the FEM and standard calculation method. The results show that the calculation results of twin shear strength theory soil arching effect are rational and safety.关键词
双剪强度理论/土拱效应/支护桩/桩间距Key words
twin shear strength theory/ soil arching effect/ retaining piles/ spacing between piles分类
建筑与水利引用本文复制引用
陈秋南,周亚军,马晓朋,李腾飞,张主华..基于双剪强度理论土拱效应的基坑支护桩间距分析[J].水文地质工程地质,2012,39(4):38-42,5.基金项目
国家自然科学基金项目(41172275) （41172275）
湖南省自然科学基金项目(08JJ3111) （08JJ3111）
湖南科技大学研究生创新基金资助项目(S110106) （S110106）
