Jam Releasing Technologies for Earth Pressure Balance Shield in Shield Receiving Shaft

doi:10.3973/j.issn.1672-741X.2016.07.017

Tunnel Construction ›› 2016, Vol. 36 ›› Issue (7): 872-876.DOI: 10.3973/j.issn.1672-741X.2016.07.017

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Jam Releasing Technologies for Earth Pressure Balance Shield in Shield Receiving Shaft

LI Hai^1,2, ZHU Changsong^1,2，*, ZHAO Dapeng^1,2

(1. China Railway Tunnel Stock Co., Ltd., Zhengzhou 450000, Henan, China;2. State Key Laboratory of Shield Machine and Boring Technology, Zhengzhou 450001, Henan, China)

Received:2015-12-28 Revised:2016-06-14 Online:2016-07-20 Published:2016-07-27

Abstract

Abstract:

The jam releasing technologies for earth pressure balance (EPB) shield in shield receiving shaft applied to Tianjin Metro Line No.3 are introduced. The jam releasing technologies include drag reduction hole drilling after chamber opening under atmospheric pressure, thrusting force increaing by setting external pump station and cylinder and using separating jam releasing method. The advantages and disadvantages of abovementioned technologies and their applicable fields are analyzed. Good effects have been achieved. The results can provide reference for jam releasing of shield of similar projects in the future.

Key words: Tianjin Metro, shield receiving, jam releasing, chamber opening under atmospheric pressure, external pump station, separating jam releasing method

CLC Number:

U 455.43

LI Hai, ZHU Changsong, ZHAO Dapeng. Jam Releasing Technologies for Earth Pressure Balance Shield in Shield Receiving Shaft[J]. Tunnel Construction, 2016, 36(7): 872-876.

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Jam Releasing Technologies for Earth Pressure Balance Shield in Shield Receiving Shaft

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