›› 2007, Vol. 28 ›› Issue (5): 909-914.

• Fundamental Theroy and Experimental Research • Previous Articles     Next Articles

Research on mechanical characteristics of metro shield tunnel segment in sandy strata

HE Chuan1, ZENG Dong-yang1, 2   

  1. 1. Department of Tunnel &Underground Engineering, Southwest Jiaotong University, Chengdu 610031, China; 2. The First Highway Survey & Design Institute of China Communications, Xi’an 710075, China
  • Received:2005-06-08 Online:2007-05-10 Published:2013-09-10

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Abstract: Based on the Nanjing metro shield tunnel traversing sandy strata, systematic in-situ investigation and theoretical simulation of the beam-spring model with consideration of the interactions between lining structure and surrounding soil during the segment assembly and stabilization are carried out. Influences of the shield tail serum injection, soil stress relaxation, water pressure and segment ring assembly on the distributions and varying laws of sandy strata segment ring soil pressure, the longitudinal joint gap and internal forces are discussed. The characteristics of the interactions between shield tunnel segment and the sandy strata are investigated. The applicable principle and method for metro shield tunnel segment design in sandy strata are also proposed.

Key words: shield tunnel, segment ring, soil pressure, longitudinal joint, internal force, beam-spring model

CLC Number: 

  • U 451
  • Please send e-mail to pingzhou3@126.com if you would like to read full paper in English for free. Parts of our published papers have English translations.
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