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Research on Numerical Simulation of the Construction Process of Double-Arch Tunnel in the Sotf Surrounding Rock

Author: FuBinBin
Tutor: ZhaoYuGuang
School: Southwest Jiaotong University
Course: Bridge and Tunnel Engineering
Keywords: Double-arch tunnel FEM Soft rock Monitoring and Measurement
CLC: U455
Type: Master's thesis
Year: 2005
Downloads: 359
Quote: 15
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Abstract


The construction of the highway , in the special geological and topographical conditions of restricted areas , in order to show highway line and the line needs, in order to obtain good technical and economic effects, often choose the structure of the tunnel arch program . At present, China has built a considerable number of the tunnel, but in the arch tunnel construction and operations often there are some problems , such as a single construction methods , construction mechanics unclear , the lack of systematic design and construction of referential theory . Thesis Guanghui Expressway Xiaojinkou double-arch tunnel as a backdrop, the construction process through to its plane elastoplastic finite element simulation analysis and on-site monitoring measurement data processing, discussed the double-arch tunnel construction process around rock stress and displacement fields , supporting structure and the distribution of the stress field wall . Papers obtained : Class Ⅱ rock in under three guide holes in the guide hole construction method than the full-face rock arch in the control law as well as the supporting structure and sedimentation in the wall by both have greater advantages . Paper guide hole depth study of three construction method construction process, on the same ground stress stress release rate and release rate of different circumstances surrounding rock displacement , supporting structure and in the walls of the stress with the variation of the construction process . Meanwhile, in-depth study of the three guide holes France during the construction of the distribution of the plastic zone . Paper also field data were analyzed simultaneously with the numerical simulation results were compared. Discusses the double-arch tunnel construction surrounding rock and support structures of the stress variation , so this paper similar future tunnel design and construction has a certain referential significance.

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CLC: > Transportation > Road transport > Tunnel project > Tunnel construction
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