ISSN 2096-4498

   CN 44-1745/U

二维码

Tunnel Construction ›› 2021, Vol. 41 ›› Issue (1): 116-125.DOI: 10.3973/j.issn.2096-4498.2021.01.013

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Design Method for Support Structure of Large Crosssection Tunnels in Hubei on ZhengzhouWanzhou Railway Constructed by Mechanized Means

TONG Jianjun1, 2, LIU Dagang1, 2, ZHANG Xiao1, 2, *, WANG Zhilong1, 2, ZHAO Siguang1, 2, LI Jiawang1, 2   

  1. 1. Key Laboratory of Transportation Tunnel Engineering Ministry of Education Southwest Jiaotong University, Chengdu 610031 Sichuan China 2. School of Civil Engineering Southwest Jiaotong University, Chengdu 610031 Sichuan China
  • Online:2021-01-20 Published:2021-02-08

Abstract: In order to establish a support structure design method suitable for mechanized construction of large crosssection tunnels, the calculation equation of the stability coefficient of the tunnel face considering three kinds of advance support measures (advance pipe roofing, face bolting and pregrouting) is deduced based on the limit equilibrium method. Then, the calculation equations of the overall displacement pressure and the local displacement pressure are derived based on the multiple nonlinear regression analysis method, the BQ system and a large number of field test data of displacement pressure of deepcovered tunnels. Later, according to the support structure design method established, the advance support and primary support parameters of tunnels on ZhengzhouWanzhou highspeed railway are presented, and the rationality of the parameters and the practicability of the proposed method are proved by practical application.

Key words: highspeed railway tunnel, large crosssection tunnel, mechanized construction, support structure design, tunnel face stability, deformation pressure

CLC Number: