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《Chinese Journal of Rock Mechanics and Engineering》 2007-11
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MODEL TEST ON SEGMENTAL LINING OF NANJING YANGTZE RIVER TUNNEL WITH SUPER-LARGE CROSS-SECTION

HE Chuan,FENG Kun,YANG Xiong (Department of Underground Engineering,Southwest Jiaotong University,Chengdu,Sichuan 610031,China)  
The mechanical characteristics of the single segment lining(φ 14.5 m) of Nanjing Yangtze River Tunnel under high static water pressure and the interaction between the lining and the stratum are studied by the indoor model test. With the developed water pressure devices,such as uniform water pressure device and nonuniform water pressure device,the actual circumstance of the water pressure on the lining is simulated;and the effects of the actual water pressure on the structural characteristics of the lining of super-large cross-section for subriver shield tunnel are achieved. The effects of different kinds of segment erections on distribution laws of the inner forces of the segmental lining under high water pressure and the differences of the inner forces due to the nonuniform and the uniform water pressures are discussed. Furthermore,the above-mentioned results are studied with the finite element calculation results. The study can provide instructional references to both design and construction of the Nanjing Yangtze River Tunnel;meanwhile,it can also be adopted for similar projects.
【Fund】: 国家高技术研究发展计划(863)项目(2006AA11Z116)
【CateGory Index】: U451.5
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