Study on Influence of Soft Ground Shield Tunneling Parameters on Ground Surface Settlement

doi:10.3973/j.issn.1672-741X.2015.12.008

Tunnel Construction ›› 2015, Vol. 35 ›› Issue (12): 1281-1286.DOI: 10.3973/j.issn.1672-741X.2015.12.008

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Study on Influence of Soft Ground Shield Tunneling Parameters on Ground Surface Settlement

CHEN Zihai¹, YANG Jianhui², GUO Xiaodong², GUAN Yajun²

(1. Zhejiang Provincial Institute of Transportation Engineering Construction Group, Hangzhou 310051, Zhejiang, China; 2. Zhejiang University of Science and Technology, Hangzhou 310023, Zhejiang, China)

Received:2014-10-08 Revised:2015-07-30 Online:2015-12-20 Published:2016-01-08

Abstract

Abstract:

The rule of ground surface settlement caused by shield tunneling in soft strata is analyzed, with a shieldbored running tunnel of Hangzhou Metro as example. The influence of grouting pressure, grout elastic modulus and excavation chamber pressure on the ground surface settlement is analyzed by ABAQUS. The results show that the excavation chamber pressure has the largest influence on the ground surface settlement, the grouting pressure comes the second, and the grout elastic modulus comes the third. The ground surface settlement consists of settlement induced by ground collapse and that induced by ground consolidation. The ground surface settlement can be effectively controlled if the tunneling parameters can be adjusted and optimized in the trial boring stage.

Key words: Metro, shield tunneling, ground surface settlement, grouting pressure, elasticity modulus of grout, excavation chamber pressure, weak strata

CLC Number:

U 455

CHEN Zihai, YANG Jianhui, GUO Xiaodong, GUAN Yajun. Study on Influence of Soft Ground Shield Tunneling Parameters on Ground Surface Settlement[J]. Tunnel Construction, 2015, 35(12): 1281-1286.

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Study on Influence of Soft Ground Shield Tunneling Parameters on Ground Surface Settlement

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