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Current Issue: Issue 01, 2021
Tunnel Construction was hosted by China Railway Tunnel Consultants Co.,Ltd. It mainly publishes research results and advanced technologies in tunnels and underground engineering and related fields; the content of the publication is based on practical technology, taking into account experiments, research and comprehensive reviews, designing tunnels and underground works in railways and highways, and related institutional projects, Water conservancy projects, geotechnical engineering, engineering blasting, engineering materials, engineering machinery, engineering management and other majors. Domestic and international scientific and technological information and industry trends in related fields.
Design Method for Support Structure of Large Cross-section Tunnels in Hubei on Zhengzhou-Wanzhou Railway Constructed by Mechanized Means
Tunnel Construction,2021,Vol 41,No. 01
In order to establish a support structure design method suitable for mechanized construction of large crosssection 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 pre-grouting) 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 deep-covered tunnels. Later, according to the support structure design method established, the advance support and primary support parameters of tunnels on Zhengzhou-Wanzhou high-speed railway are presented, and the rationality of the parameters and the practicability of the proposed method are proved by practical application.