ISSN 2096-4498

   CN 44-1745/U

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wenzhang

Reinforcement Technology for and Stability Analysis on End Soil in Shield Launching and Arrival

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  • (1. China Railway Tunnel Survey & Design Institute Co., Ltd., Tianjin 300133, China; 2. State Key Laboratory for Geomechanics & Deep Underground Engineering, China University of Mining & Technology, Xuzhou 221008,Jiangsu China)

Received date: 2012-09-06

  Revised date: 2012-11-05

  Online published: 2012-12-28

Abstract

Shield tunneling is one of the popular construction methods for tunnels in soft ground in urban area. However, accidents often occur in shield launching and arriving due to the stability problem of the end soil. The unstability of the end soil is a main risk in shield launching and arrival. Relevant engineering data and study results are summarized and analyzed in the paper. Conclusions drawn are as follows: 1) An end soil reinforcement database is proposed for shield launching and arrival, and automatic selection of the end soil reinforcement methods is realized. 2) Analysis and judgment are made on the stability of each soil layer on basis of the characteristics and parameters of the soil strata, considering the water condition and the nonwater condition. 3) A judgment method for the comprehensive stability of the end soil in shield launching and arrival is proposed, on basis of analysis and judgment on the stability of each soil layer.

Cite this article

ZHU Shiyou, LIN Zhibin, GUI Changlin . Reinforcement Technology for and Stability Analysis on End Soil in Shield Launching and Arrival[J]. Tunnel Construction, 2012 , 32(6) : 788 -795 . DOI: 10.3973/j.issn.1672-741X.2012.06.007

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