近距离重叠盾构隧道施工工序优化  

Process Optimization of Close Overlapping Shield Tunnel During Construction

作　　者：江宇[1] 王士民[1] 王鹰[1] 郭晨[1] 

机构地区：[1]西藏大学工学院,西藏拉萨850000

出　　处：《施工技术》2015年第13期92-96,共5页Construction Technology

基　　金：国家自然科学基金项目:G318西藏林芝-波密段斜坡动力响应与滑坡启动机理研究(41462012);西藏自治区自然科学基金项目:基于概率统计方法G318国道林芝-波密段综合地质灾害预警模型研究(2015ZR-13-7)

摘　　要：结合深圳地铁3号线工程,采用数值模拟计算方法,研究近距离重叠盾构隧道施工的相互影响。考虑"先上洞,后下洞"和"先下洞,后上洞"两种施工顺序,重点分析施工对地表沉降及盾构管片应力和应变的影响程度,并与现场监测结果进行对比。通过对比分析可知,采用"先上后下"的施工顺序,隧道对地表沉降和管片环向应力和应变影响最小。Based on Shenzhen Metro Line 3 project, using the numerical simulation methods to study the interaction of close overlapping shield tunnel during construction. Considered two construction process that ＂first upper tunnel, next lower tunnel＂ and ＂first lower tunnel, next upper tunnel＂ the authors focused on the extent of the influence of construction on the surface subsidence and the stress and strain of shield segment. Compared with the results of the on-site monitoring, through the comparison analysis, this paper made the conclusion that using the construction sequence of ＂first upper tunnel, next lower tunnel＂, the tunnel would have the minimal influence on the surface subsidence and the circumferential stress and strain of the segment.

关 键 词：隧道工程 盾构 沉降 数值模拟 施工 

分 类 号：TU473[建筑科学—结构工程]