矩形顶管隧道掌子面支护压力及稳定性分析  

ANALYSIS OF SUPPORTING PRESSURE AND STABILITY OF EXCAVATION FACE FOR RECTANGULAR PIPE JACKING TUNNEL

作　　者：王明胜[1] 王光辉 刘岩 徐虎城 叶康慨 

机构地区：[1]中铁隧道集团有限公司,河南洛阳471000 [2]中铁隧道勘测设计研究院有限公司,河南洛阳471000 [3]中铁隧道股份有限公司,郑州450000

出　　处：《低温建筑技术》2017年第5期82-84,89,共4页Low Temperature Architecture Technology

摘　　要：为了研究繁华城区大断面顶管隧道施工过程中掌子面的支护压力及稳定性规律,本文采用有限元数值模拟,计算分析了不同地层下隧道掌子面变形发展规律,对比分析了两种工况下极限支护压力比λ,同时计算分析了隧道埋深和土体强度因素对极限支护压力的影响规律。研究成果能够为工程施工中掌子面稳定压力的确定提供数据支持。In order to study the laws of supporting pressure and stability of tunnel face during the construction of large section pipe jacking tunnel in prosperous urban area, the development of deforma- tion of tunnel face with different stratums was calculated by adopting the FEM numerical simulation. The ultimate support pressure ratio under two conditions was analyzed. In addition, the effects of buried depth and soil strength on ultimate supporting pressure were studied. The conclusion can be used to de- termine the steady pressure of tunnel face during engineering construction.

关 键 词：矩形顶管隧道 极限支护压力 稳定性分析 

分 类 号：TU942[建筑科学—建筑技术科学]