Numerical and Theoretical Analysis of Freezinginduced Water Leakage of Metro Shield Tunnel

doi:10.3973/j.issn.2096-4498.2018.02.004

Tunnel Construction ›› 2018, Vol. 38 ›› Issue (2): 176-182.DOI: 10.3973/j.issn.2096-4498.2018.02.004

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Numerical and Theoretical Analysis of Freezinginduced Water Leakage of Metro Shield Tunnel

YANG Xiaoping¹, LIN Peiqin¹, CONG Zhu¹, LIU Tingjin^{1, 2, *}

(1. School of Civil Engineering and Transportation, South China University of Technology, Guangzhou 510640, Guangdong, China; 2. State Key Laboratory of Subtropical Architecture Science, South China University of Technology, Guangzhou 510640, Guangdong, China)

Received:2017-03-14 Revised:2017-07-11 Online:2018-02-20 Published:2018-03-19

Abstract

Abstract:

A threedimensional detailed finite element model of threering segment lining structure is established by numerical analysis method. The influence of freezing excavation of foundation pit above the metro shield tunnel on the opening of circumferential joints and longitudinal joints of shield tunnel is studied; and the causes for water leakage of circumferential joints are analyzed. The results show that: 1) The opening of the longitudinal and circumferential joints and bolt stress increases with the freezing temperature decrease. 2) The maximum opening of the circumferential joints is 4.2 times the longitudinal one under the interaction of soil load and freezing temperature. 3) The friction caused by rubber gasket and joint groove is less than water pressure because the opening of the circumferential joints is the main cause that results in the water leakage of tunnel.

Key words: metro shield tunnel, freezing method, water leakage, segment joints, threedimensional detailed finite element model

CLC Number:

U 45

YANG Xiaoping, LIN Peiqin, CONG Zhu, LIU Tingjin. Numerical and Theoretical Analysis of Freezinginduced Water Leakage of Metro Shield Tunnel[J]. Tunnel Construction, 2018, 38(2): 176-182.

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Numerical and Theoretical Analysis of Freezinginduced Water Leakage of Metro Shield Tunnel

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