吉林大学学报(工学版) ›› 2011, Vol. 41 ›› Issue (增刊2): 180-184.

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Vertical mechanical behavior on shield tunnel under loads on ground surface

LI Chun-liang1,2, WANG Guo-qiang1, ZHAO Kai-jun3, ZHU Chun-feng4   

  1. 1. College of Mechanical Science and Engineering, Jilin University, Changchun 130022, China;
    2. School of communication Science &|Engineering, Jilin Architectural and Civil Engineering Institute, Changchun 130117, China;
    3. Shenyang Heavy Machinery Group Co．,Ltd．,Shenyang 110025,China;
    4. Jilin communications Polytechnic,Changchun 130012,China
  • Received:2011-04-09 Online:2011-09-30 Published:2011-09-30

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Abstract:

The mechanical model of shield tunnel is established with elastic foundation beam theory.The model can predict the value of additional longitudinal settlement and internal force of the shield.And the theoretical results coincide with the finite element results.According to the different coefficient of subgrade reaction,buried depth and stiffness,the longitudinal mechanics behavior of shield tunnel is reached.The results indicate that coefficient of soft subgrade reaction and buried depths have great influence on mechanics behavior of shield tunnel.The big additional settlement deformation and interval force will appear,even lead to structure failure when buried depth or soil strength is low.Therefore,in the design,shallow buried shield tunnel in soft soil should be avoided,it is necessary to take reinforcement treatment of foundation.

Key words: civil engineering, shield, tunnel, coefficient of subgrade reaction, vertical mechanical behavior, ground load

CLC Number: 

  • TU432


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