饱和软土地层中管幕法隧道施工风险分析  

ANALYSIS OF CONSTRUCTION RISKS FOR PIPE-ROOFING TUNNEL IN SATURATED SOFT SOIL

作　　者：朱合华[1] 闫治国[1] 李向阳[1] 刘学增[1] 沈桂平 

机构地区：[1]同济大学地下建筑与工程系 [2]上海中环线建设发展有限公司,上海200072

出　　处：《岩石力学与工程学报》2005年第A02期5549-5554,共6页Chinese Journal of Rock Mechanics and Engineering

基　　金：上海市重大科技攻关计划"城市地下空间开发应用核心技术和关键问题研究"项目(04dz12004);上海市岩土工程重点学科资助项目

摘　　要：上海市中环线虹许路—北虹路下立交工程设计采用管幕结合箱涵顶进—有中继间的推进工法施工,是我国第一次引进管幕工法施工,也是世界上在饱和软土地层中施工的最大、最长的管幕法工程,其工程规模大,工艺新颖,工程地质条件差,存在很大的施工风险。运用风险分析方法,分析了饱和软土地层中施工管幕法隧道时在管幕顶进精度、管幕顶进阻力、地表沉降(隆起)、管幕损坏、管幕水密性、管幕锁口连接以及箱涵开挖面稳定、箱涵损坏、箱涵方向控制、管幕下沉、箱涵安全出洞、地面变形控制等方面存在的风险,得出了工程的总体风险水平,并提出了相应的防范措施。With the consideration of geological conditions, the pipe-roofing method--advancing method with relay station, is used in the project of Shanghai Hongxu--Beihong road. It is the first time to use pipe-roofing method to construct tunnel in China, and it is the largest and longest pipe-roofing tunnel in saturated soft soil. There are high construction risks because of large-section 〈 dvert box, novel construction method and unfarournble geological conditions. On the basis of risk analysis theory, the construction risks, which exist in advancing precisions of pipe-roofing, earth settlement （upheaval）, pipe damage, waterproof capacity of pipe-roofing, joint types, stability of excavation face, box damage, box advancing direction controlling, pipe settlement, enit safety of box, and ground deformation controlling, are discussed. Total risk level of the project is gained, and the preventing methods are presented.

关 键 词：隧道工程 管幕法隧道 施工风险 防范措施 大断面箱涵 饱和软土 

分 类 号：U455[建筑科学—桥梁与隧道工程]