基坑相邻地铁隧道变形与应力控制措施  

Analysis on the Deformation and Stress Control Measures of Metro Tunnel Near a Foundation Pit

作　　者：徐长节[1,2] 孙凤明[1,2] 陈金友 徐礼阁[1,2] 

机构地区：[1]浙江大学滨海和城市岩土工程研究中心,杭州310058 [2]浙江大学软土与环境工程教育部重点实验室,杭州310058 [3]杭州市城东新城建设投资有限公司,杭州310021

出　　处：《土木建筑与环境工程》2013年第S1期75-80,共6页Journal of Civil,Architectural & Environment Engineering

摘　　要：基坑开挖对周边环境的影响已经成为很普遍的现象,如何在设计和施工中采取相应措施来保证在建和已有工程的安全成为关键部分。本文针对某邻近已建隧道的基坑,运用有限元软件plaxis对其施工对隧道的影响进行了数值分析研究。分析结果表明采取加强有关围护结构刚度以及分块对称开挖等措施能显著控制已建隧道的变形,通过和常规设计施工方法比较研究,证明了该工程的设计和施工能够保证已建隧道的安全,同时说明在基坑开挖前对其对邻近的地下建筑物的影响进行预研是十分必要的。It has become a very common phenomenon that the influence of pit excavation to the adjacent environment,what corresponding measures should be taken in design and construction to ensure the safety of construction in process and existing has become a key part.This Paper analyses the influence of pit construction to adjacent tunnel by using the finite element software plaxis.The analysis results show that strengthening the palisade structure stiffness and partitioning symmetric excavation can significantly control the deformation of the existing tunnel.The design and construction of the engineering can ensure the safety of the existing tunnel compared with the conventional construction methods,and it also shows that preliminary analysis of influence to the adjacent underground building before pit excavation is very necessary.

关 键 词：PLAXIS 基坑开挖 地铁隧道 影响分析 

分 类 号：U451[建筑科学—桥梁与隧道工程]