›› 2009, Vol. 30 ›› Issue (7): 2058-2062.

• Geotechnical Engineering • Previous Articles     Next Articles

Analysis of 3D internal forces distribution of wide segment lining for large-section shield tunnel

ZHANG Jian-gang 1, 2, HE Chuan1, YANG Zheng1   

  1. 1. School of Civil Engineering, Southwest Jiaotong University, Chengdu 610031, China; 2. College of Water Conservancy and Civil Engineering, Shandong Agricultural University, Taian 271018, China
  • Received:2007-12-12 Online:2009-07-10 Published:2011-03-10

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Abstract:

Taking the Wuhan Yangtze River tunnel as an engineering background, the internal forces distribution of segment lining structure with different segment widths and different ring joint shear stiffnesses is analyzed by 3Dshell-spring model and compared with the results achieved by beam-spring model. The study shows that: the maximum bending moment on the entire ring always occur on the edge of segment; the ring joint shear force has an great impact on the edge of segment and less in the middle of segment; when the ring joint shear stiffness is non-infinite, the maximum bending moment on the edge of segment calculated by shell-spring model is slightly larger than the results by beam-spring model; and these results almost equal when the joint shear stiffness is infinite; the maximum bending moment in the middle of segment calculated by shell-spring model is between the results by beam-spring model with stagger-jointed and those results by beam-spring model in sequence, and tend to the results in sequence with the segment width increased; when the segment width is large, the maximum shear force between rings calculated by beam-spring model is unfit for shear design of the ring joint.

Key words: shield tunnel, segment lining, shell-spring model, segment width, ring joint

CLC Number: 

  • U 451+.4
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