摘要
为了分析基坑开挖对周围环境的影响,基于颗粒流数值模拟方法,利用边界伺服法构建理想颗粒体系,利用线性接触黏结模型标定岩土体的细观力学参数。结果表明:基坑开挖后距离基坑壁60~70m地表变形约5mm;60~70m远处的管道相对变形量不超过3 mm,不会引起管线不均匀沉降而破坏;桩墙失效基坑周围的素填土以及淤泥质黏土将会向基坑滑塌,其滑塌范围从基坑内壁向外约影响10m,约为基坑开挖深度的2~3倍范围。
In order to analyze the influence of foudation pit excavation on surrounding environment Based on the numerical simulation method of particle flow,the ideal particle system is constructed by boundary servo method,and the micro-mechanical parameters of rock and soil are calibrated by linear contact bond model.On this basis,the influence of foundation pit excavation on surrounding environment is analyzed.The results show that the ground deformation of 60-70 m away from the foundation pit wall is about 5 mm after excavation,the relative deformation of pipeline at 60-70 m away from the foundation pit wall is less than 3 mm,which will not cause uneven settlement of pipeline and damage;the plain filling and muddy clay around the failure foundation pit of pile wall will slide to the foundation pit,and the collapse range affects 10 m approximately from the inner wall of the foundation pit,which is about 2~3 times the depth of the foundation pit.The research results can provide reference for the judgment of the stability of foundation pit wall and the deformation control of surrounding soil.
作者
焦春茂
汪华安
陈晓
JIAO Chunmao;WANG Huaan;CHEN Xiao(Guangdong Electric Power Design&Research Institute Co.Ltd China Energy Construction Group.,Guangzhou 510663;Research Institute of Geotechnical Engineering,Hohai University,Nanjing 210094)
出处
《河北工程大学学报（自然科学版）》
CAS
2019年第2期28-32,共5页
Journal of Hebei University of Engineering:Natural Science Edition
基金
国家自然科学基金资助项目(51679071)
关键词
基坑
颗粒流
沉降变形
坑壁稳定
foundation pit
grain flow
subsidence deformation
stability of pit wall
