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Research about the Effect of Weak Intercalation to Tunnel Surrounding Rock

Author: YangHaiFeng
Tutor: QiaoChunSheng
School: Beijing Jiaotong University
Course: Geotechnical Engineering
Keywords: Weak interlayer Underground cavern Stability Numerical Simulation
CLC: U451.2
Type: Master's thesis
Year: 2011
Downloads: 78
Quote: 1
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Abstract


Abstract: The large number of engineering practice : the weak interlayer has an important impact on the stability of surrounding rock of the tunnel . This article through the collection and analysis of previous data and related research , summed up the status quo of research on this topic , the basic theory of the basic engineering properties of soft sandwich as well as the surrounding rock stress . Firstly, the use of the platform based on the finite difference numerical analysis software FLAC3D ideal elastoplastic stress-strain relationship and Mohr strength criterion , the numerical analysis of the existing model test , through a comparative analysis of the results of the analysis method used feasibility evaluation ; Next, create practical problems of three - dimensional simplified model , using appropriate analytical methods proved to focus on the variation of the thickness of the study weak interlayer inclination changes , the change in the distance between the excavation contour , changes in the distribution position and Finally , the influence of changes in the stress field of tunnel surrounding rock stability ; Harbin beltway transit of Hengshan tunnel collapse segment numerical simulation, and analysis of the reason of the landslides occurred . The rich quantitative results of this article obtained by numerical simulation for the stability of underground caverns with weak intercalated analysis has important reference value .

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CLC: > Transportation > Road transport > Tunnel project > Tunnel structure theory > Theory of tunnel surrounding rock
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