三峡大学学报（自然科学版）2012，Vol.34Issue(1)：46-53,8.
基坑排桩桩间土拱效应的颗粒流模拟研究
Particle Flow Simulation of Soil Arching Effect between Foundation Pit Retaining Piles
摘要
Abstract
The net distance between pit piles will affect the force and deformation of the soil behind pile, using continuous medium method can not study the impact of soil arching between adjacent piles on soil behind pile. In this paper, the particle flow code in two dimensions (PFC2D) simulates the entire process of formation, development and failure for the level arch of soil between piles, and analyzes the effects of pile spacing on soil arching, and contrasts the square pile with circular pile in soil arching effect differences. The results reveal the soil arching effect formation and destruction mechanism from the microscopic aspect. The analysis finds that the maximum capacity of of the soil arching, the maximum pile load-sharing ratio decreases with increase of the ratio of the net spacing between piles to the pile diameter; in the case of the same pile spacing, the force performance of square pile is clearly superior to round pile. Therefore, during the design of supporting piles, we should choose reasonable pile section shape and pile spacing so as to optimize the design and save investment.关键词
基坑支护/排桩/土拱效应/颗粒流程序/桩间距Key words
foundation pit support/row piles/soil arching effect/particle flow code/pile spacing分类
建筑与水利引用本文复制引用
李明明,程雪松,郑刚..基坑排桩桩间土拱效应的颗粒流模拟研究[J].三峡大学学报（自然科学版）,2012,34(1):46-53,8.基金项目
国家重点基础研究发展计划(973计划)资助项目(2010CB732106) （973计划）
