大断面水下盾构隧道原型结构加载试验系统的研发与应用  

DEVELOPMENT AND APPLICATION OF LOADING TEST SYSTEM OF PROTOTYPE STRUCTURE FOR UNDERWATER SHIELD TUNNEL WITH LARGE CROSS-SECTION

作　　者：何川[1] 封坤[1] 苏宗贤 

机构地区：[1]西南交通大学地下工程系,四川成都610031 [2]港珠澳大桥管理局,广东珠海519015

出　　处：《岩石力学与工程学报》2011年第2期254-266,共13页Chinese Journal of Rock Mechanics and Engineering

基　　金：国家重点基础研究发展计划(973)项目(2010CB732105);国家杰出青年科学基金项目(50925830)

摘　　要：针对大断面水下盾构隧道衬砌结构特点,提出管片结构(包括接缝结构及整环衬砌结构)的原型试验加载方法,并自主研发多功能盾构隧道结构加载试验系统,该系统可根据不同需求进行组装和拆卸,既可进行管片接头力学试验,又可成功将水压与土压分离,进行管片衬砌结构的加载试验。随后,采用该试验系统对南京长江隧道及珠江狮子洋隧道管片衬砌结构进行原型加载试验,包括错缝拼装、通缝拼装结构的加载试验,接头抗弯、抗剪试验等,并选取部分试验结果与数值计算对比,验证该试验加载方法对大断面盾构隧道结构体系进行系统研究的正确性及可靠性,为科研、设计和生产提供可靠的试验手段。According to the features of underwater shield tunnel with large cross-section,an integrated test method is proposed for prototype segmental lining structure,including joint structure and whole ring lining structure. The ＂Multifunction Shield Tunnel Structure Loading Test System＂has been developed according to the test method. The system not only can perform the prototype test of segmental lining structure,but also can test the mechanics of joints. Then the test method and test system are applied to prototype tests for Nanjing Changjiang tunnel and Guangzhou Shiziyang tunnel. Meanwhile,joint bending stiffness and shear stiffness are both obtained successfully through a series of tests;and a part of results obtained by prototype tests is compared with numerical results to verify the accuracy and reliability of the test method and test system,so as to provide reliable test means for research,design and construction of underwater shield tunnel projects.

关 键 词：隧道工程 水下盾构隧道 管片衬砌结构 原型试验 加载系统 

分 类 号：U45[建筑科学—桥梁与隧道工程]