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| RESEARCH ON LARGE SQUEEZING DEFORMATION AND ITS NONLINEAR RHEOLOGICAL MECHANICAL CHARACTERISTICS OF TUNNEL WITH WEAK SURROUNDING ROCKS |
| SUN Jun1，2，PAN Xiaoming1，3 |
| (1. Key Laboratory of Geotechnical and Underground Engineering of Ministry of Education，Tongji University，Shanghai 200092，China；2. Hangzhou Fengqiang Civil Engineering Research Institute，Hangzhou，Zhejiang 310008，China；3. Shenzhen Metro Group Co.，Ltd.，Shenzhen，Guangdong 518026，China) |
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Abstract A complex mechanical behavior of large squeezing deformation of tunnel weak rocks is discussed under high ground stress condition. The large squeezing deformation can be belonged to the scope of a kind of large deformation rate with slow convergence. On the basis of rheological squeezing deformation?s mechanism，a nonlinear 2D visco-elastoplastic constitutive model and a 3D elasto-viscoplastic constitutive model in case of large/small deformations are proposed respectively；and the corresponding secondary development special softwares are studied. The developed material subroutines are applied to analyzing the squeezing problem which occurred in rock excavation for the Wushaoling railway tunnel project.
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Received: 28 June 2012
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MAO Yuting1, 2, HE Manchao1, 2, LIU Fangzhou3, BAI Xing4, YANG Xiaojie1, 2, TAO Zhigang1, 2*. Development and application of a large-scale physical model system for tunnel creep testing[J]. , 2026, 45(6): 1627-1638. |
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2012, Vol. 31 
