摘要
为了减小地下连续墙施工工艺对周围环境的影响,文中以广州市某地铁车站基坑工程为背景,利用MIDAS GTS NX软件建立墙厚与嵌固深度的三维模型,分析不同变量的影响规律,基于位移安全储备系数对地下连续墙的墙厚与嵌固深度进行优化设计。数值计算结果表明:地下连续墙的墙厚与嵌固深度均存在一个临界值,若低于此临界值,增加墙厚与嵌固深度,基坑变形较显著;若超过此临界值,继续增加墙厚与嵌固深度,基坑变形的影响效果甚微。对于该大型地下连续墙墙厚宜取1m,嵌固深度宜取10m。
In order to reduce the influence of underground continuous wall construction technology on the surroundings,the paper establishes a three-dimensional model of wall thickness and embedded depth with the MIDAS GTS NX software.With a subway station excavation in Guangzhou City as an example,the model was used to analyze the effect of different variables.Based on the safety coefficients of the displacement,the design of wall thickness and embedded depth were optimized.The numerical calculation results show that both the wall thickness and embedded depth of the underground continuous wall have a critical value.Less than the critical values,increasing the wall thickness and embedded depth will cause significant deformation of the foundation pit;greater than the critical value,increasing the wall thickness and embedded depth causes little deformation of the foundation pit.The optimal wall thickness is 1 m and the best embedded depth is 10 m.
作者
刘新龙
张智朋
LIU Xinlong;ZHANG Zhipeng(School of Civil&Architecture Engineering,Xi’an Technological University,Xi’an 710021,China)
出处
《西安工业大学学报》
CAS
2019年第1期45-52,共8页
Journal of Xi’an Technological University
关键词
异形基坑
嵌固深度
地下连续墙
基坑变形
special shaped foundation pit
embedded depth
underground continuous wall
deformation of foundation pit
作者简介
第一作者:刘新龙(1965-),男,西安工业大学副教授,主要研究方向为岩土工程设计与施工技术,E-mail:1603210905@qq.com。
