Optimized Design and Application of EPB Shields  for Typical Sandy Cobble Ground in China

doi:10.3973/j.issn.1672-741X.2013.11.014

Tunnel Construction ›› 2013, Vol. 33 ›› Issue (11): 971-976.DOI: 10.3973/j.issn.1672-741X.2013.11.014

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Optimized Design and Application of EPB Shields  for Typical Sandy Cobble Ground in China

PU Xiaobo¹, WANG Mogong², WU Wenbin²

(1. China Railway Tunnelling Equipment Co., Ltd., Zhengzhou 450016, Henan, China;  2. China Railway No.3 Engineering Group Co., Ltd., Taiyuan 030001, Shanxi, China)

Received:2013-06-19 Revised:2013-09-28 Online:2013-11-20 Published:2013-11-15

Abstract

Abstract:

When EPB shields are used in sandy cobble ground, problems such as abnormal wearing of the cutterhead and cutting tools, cutterhead clogging and ground surface settlement may occur. In the paper, study is made on the optimized design of EPB shields on basis of lessons learnt in the sandy cobble ground in Chengdu and Beijing. The EPB shields are optimized in terms of cutterhead and cutting tools, screw conveyor, soil conditioning and grouting control. In the end, optimized design of EPB shields for sandy cobble ground are proposed. The paper can provide reference for the design of EPB shields for similar grounds in the future.

Key words: sandy cobble ground, EPB shield, design, cutter head and cutting tool, screw conveyor, soil conditioning, grouting control

PU Xiaobo, WANG Mogong, WU Wenbin. Optimized Design and Application of EPB Shields  for Typical Sandy Cobble Ground in China[J]. Tunnel Construction, 2013, 33(11): 971-976.

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Optimized Design and Application of EPB Shields  for Typical Sandy Cobble Ground in China

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