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Large section tunnel construction method and load distribution mechanisms of complex conditions

Author: YangDeSheng
Tutor: YangXiaoLi
School: Central South University
Course: Civil Engineering
Keywords: Large section of Neighborhood Tunnel Numerical Simulation Construction program Surrounding rock pressure Clear distance
CLC: U455.4
Type: Master's thesis
Year: 2011
Downloads: 51
Quote: 0
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Abstract


Neighborhood Tunnel folder rock pillars thinner , smaller double hole clear distance between ordinary separate tunnel and arch tunnel between a tunnel type . Neighborhood Tunnel can be well positioned to meet the specific geological and topographical conditions and line bridge and tunnel convergence favor line the overall linear programming and linear optimization , with significant technical and economic effect , which has been more and more widely . Guangshen Coastal Highway single arch four-lane small spacing feast Kong tunnel engineering background , through numerical simulation and theoretical analysis , made ??a detailed study of a large section of Neighborhood Tunnel construction methods and mechanical mechanisms , the main work is as follows : ( 1 ) This article first summarizes the Neighborhood Tunnel Research , combined feast Kong tunnel engineering parameters , the use of three-dimensional fast finite difference method to create a tunnel model for numerical simulation . Large section the small spacing two holes tunnel in Rock Classification (Ⅲ , Ⅳ level , V level ), at different depths ( shallow , shallow bias deeply buried ) and different construction methods ( full-face method , steps law , CD method , CRD method , double side heading method ) , invert uplift their crown settlement , cave convergence surface subsidence and wall stress and displacement in the plastic zone were analyzed to To attain the optimal construction of large section of Neighborhood Tunnel under different geological and geomorphological conditions . Neighborhood Tunnel Shallow bias case its construction sequence and variation of Neighborhood Tunnel stress displacement gradient changes were also made by the appropriate research . (2) a brief summary of recent years, many domestic scholars double hole tunnel surrounding rock pressure on the single- track tunnels and small clear space exploration , summarized the calculation model of the shallow tunnel , the bias of the shallow tunnel and deeply buried tunnel calculated on the basis of previous studies to find a new calculation of Neighborhood Tunnel ( deeply buried tunnel ) rock pressure .

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