浅埋砂土中盾构法隧道开挖面极限支护压力及稳定研究  

Study on limit supporting pressure and stabilization of excavation face for shallow shield tunnels in sand

作　　者：黄正荣[1] 朱伟[1] 梁精华[1] 秦建设[1] 

机构地区：[1]河海大学岩土工程研究所

出　　处：《岩土工程学报》2006年第11期2005-2009,共5页Chinese Journal of Geotechnical Engineering

摘　　要：盾构法隧道施工中,通过在开挖面施加与原始地应力相等的支护压力来预防开挖引起地层变位较大或开挖面失稳,但是由于地层条件和施工等因素的影响,使得开挖面支护压力的设定和控制较为困难,通过数值模拟分析了支护压力与开挖面变形及稳定系数的关系,对于施工中保持开挖面稳定有一定的指导意义。During construction of shield tunnel, support pressure was usually applied to prevent large displacement of soil or collapse of excavated surface. However, the design and control of appropriate supporting pressure were difficult for the large variation of soil conditions and uncertainties in actual filed construction. Supporting pressure and deformation and stabilization of excavation surface were studied by use of numerical simulation. It could provide some guidance to the stabilization of excavation face of shield tunnels.

关 键 词：开挖面 稳定 数值解 安全系数 

分 类 号：U451[建筑科学—桥梁与隧道工程]