Study of Influence of Construction of Large Crosssection Rectangular EPBtype Pipe Jacking Tunnel on Below Operating Metro Tunnel Deformation

doi:10.3973/j.issn.2096-4498.2018.04.010

Tunnel Construction ›› 2018, Vol. 38 ›› Issue (4): 594-602.DOI: 10.3973/j.issn.2096-4498.2018.04.010

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Study of Influence of Construction of Large Crosssection Rectangular EPBtype Pipe Jacking Tunnel on Below Operating Metro Tunnel Deformation

YI Dan¹, YAN Detian², DANG Jun^3

（1. China Railway Eryuan Engineering Group Co., Ltd., Chengdu 610031, Sichuan, China; 2. Key Laboratory of Transportation Tunnel Engineering, Ministry of Education, Southwest Jiaotong University, Chengdu 610031, Sichuan, China; 3. Southwest Jiaotong University, Chengdu 610031, Sichuan, China）

Received:2017-06-02 Revised:2017-10-09 Online:2018-04-20 Published:2018-05-06

Abstract

Abstract:

The influence of large crosssection rectangular EPBtype pipe jacking tunnel under South Renmin Road on below operating metro tunnel deformation is analyzed; and then comparison between simulation results and monitoring data is made to verify the rationality of the simulation model. Some conclusions are drawn as follows: (1) The vertical deformation of the below existing metro tunnel induced by the construction of the pipe jacking tunnel is greatly affected by supporting pressure of excavation face in the early stage; and it is mainly affected by excavation unloading effect as the excavation face moves forward. (2) The horizontal displacement of the metro tunnel is affected by supporting pressure of excavation face and excavation unloading effect; and the upper crosssection of metro tunnel segment lining is significantly affected by supporting pressure of excavation face.

Key words: large crosssection pipe jacking tunnel, crossing above metro tunnel, deformation, supporting pressure, excavation unloading effect

CLC Number:

U 455.47

YI Dan, YAN Detian, DANG Jun. Study of Influence of Construction of Large Crosssection Rectangular EPBtype Pipe Jacking Tunnel on Below Operating Metro Tunnel Deformation[J]. Tunnel Construction, 2018, 38(4): 594-602.

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Study of Influence of Construction of Large Crosssection Rectangular EPBtype Pipe Jacking Tunnel on Below Operating Metro Tunnel Deformation

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