Effect of Foundation Pit Excavation on Existing Underlying Tunnel: Case Study on Chegongmiao Comprehensive Transportation Hub on Line 11 of Shenzhen Metro

doi:10.3973/j.issn.1672-741X.2015.09.002

Tunnel Construction ›› 2015, Vol. 35 ›› Issue (9): 867-872.DOI: 10.3973/j.issn.1672-741X.2015.09.002

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Effect of Foundation Pit Excavation on Existing Underlying Tunnel: Case Study on Chegongmiao Comprehensive Transportation Hub on Line 11 of Shenzhen Metro

DING Jialiang¹, CHEN Jiang², YU Fuxian¹, TANG Xianhai¹

(1. The Third Engineering Co., Ltd. of China Railway Tunnel Group, Shenzhen 518000, Guangdong, China; 2. School of Civil Engineering, Central South University, Changsha 410075, Hunan, China)

Received:2015-05-15 Revised:2015-07-03 Online:2015-09-20 Published:2015-09-22

Abstract

Abstract:

The impact of the excavation of the foundation pits of the west ventilation tunnel and the station of Chegongmiao〖JP〗 comprehensive transportation hub on Line 11 of Shenzhen Metro on the existing tunnel of Line 1 of Shenzhen Metro is analyzed in the paper. The rule of the deformation of the existing tunnel induced by the excavation of the foundation pits, as well as the consolidation effect of the jet grouting piles, is analyzed by means of threedimensional finite element program ABAQUS. Furthermore, the deformation of the existing tunnel is analyzed on basis of the measured data. It is concluded that the jet grouting consolidation can effectively reduce the uplift displacement of the existing tunnel.

Key words: Shenzhen Metro, adjacent foundation pits, west ventilation tunnel, existing tunnel, jet grouting pile, monitoring, threedimensional numerical analysis

CLC Number:

U 455

DING Jialiang, CHEN Jiang, YU Fuxian, TANG Xianhai. Effect of Foundation Pit Excavation on Existing Underlying Tunnel: Case Study on Chegongmiao Comprehensive Transportation Hub on Line 11 of Shenzhen Metro[J]. Tunnel Construction, 2015, 35(9): 867-872.

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Effect of Foundation Pit Excavation on Existing Underlying Tunnel: Case Study on Chegongmiao Comprehensive Transportation Hub on Line 11 of Shenzhen Metro

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