大断面盾构隧道结构横向刚度有效率的原型试验研究  

Prototype tests on effective bending rigidity ratios of segmental lining structure for shield tunnel with large cross-section

作　　者：封坤[1] 何川[1] 夏松林 

机构地区：[1]西南交通大学地下工程系,四川成都610031 [2]武汉地铁集团有限公司,湖北武汉430000

出　　处：《岩土工程学报》2011年第11期1750-1758,共9页Chinese Journal of Geotechnical Engineering

基　　金：国家973计划项目(2010CB732105);国家杰出青年科学基金项目(50925830);西南交通大学优秀博士学位论文培育项目资助

摘　　要：通过对盾构隧道横向刚度有效率的影响因素进行分析,提出了针对大断面水下盾构隧道横向刚度有效率的原型试验求解方法,进而对南京长江隧道及广州珠江狮子洋隧道管片衬砌结构开展原型试验,得出两座隧道管片结构η和ξ随荷载条件变化的规律。结果表明,在同等荷载条件下,断面越大,η越小,对应ξ越大,错缝结构的η大于通缝结构。正弯区与负弯区的ξ不同,对于不同的管片结构型式,ξ与η的对应关系不同。同时,针对两座隧道不同结构形式给出了η,ξ的关系曲线,并提出了10 m级和15 m级水下盾构隧道通缝与错缝条件下η与ξ的建议值。Through the analysis of the sensitive factors of effective bending rigidity ratios of shield tunnel structure,an efficient solution method based on prototype tests is proposed for the effective bending rigidity ratios.The prototype tests on segmental lining structure of Nanjing Yangtze River Shield Tunnel and Guangzhou Zhujiang River Shiziyang Shield Tunnel are carried out.The variation of and with load conditions is deduced.The results show that under the same load conditions,when the profile is larger,becomes smaller,and meanwhile becomes larger.The value of of staggered assembling structure is larger than that of straight assembling structure.The values of vary in positive and negative bending regions,and the relationship between and becomes various when using different structural types.Furthermore,the relationship between and of the two different structural types is given,and the recommended values of and of segmental lining structure using the straight assembling and the staggered assembling are proposed for 10 m and 15 m class underwater shield tunnels.

关 键 词：水下盾构隧道 管片衬砌结构 横向刚度有效率 弯矩增大系数 原型试验 

分 类 号：U451[建筑科学—桥梁与隧道工程]