Experimental Study on Waterproof Performance of Double-Sealing&nbsp;Gaskets at Segmental Joints of Shield Tunnels

ZHANG Wenjun; ZHOU Xinnan; ZHANG Gaole; HE Weiguo; YU Yong

doi:10.3973/j.issn.2096-4498.2024.09.003

Tunnel Construction >

2024 , Vol. 44 >Issue 9: 1744 - 1751

DOI: https://doi.org/10.3973/j.issn.2096-4498.2024.09.003

Experimental Study on Waterproof Performance of Double-Sealing Gaskets at Segmental Joints of Shield Tunnels

ZHANG Wenjun ,
ZHOU Xinnan ,
ZHANG Gaole ,
HE Weiguo ,
YU Yong

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(1. School of Civil Engineering, Tianjin University, Tianjin 300354, China; 2. School of Civil and Architectural Engineering, Guangxi University, Nanning 530004, Guangxi, China; 3. China Railway Liuyuan Group Co., Ltd., Tianjin 300133, China)

Online published: 2024-10-12

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Abstract

A self-designed device for testing the waterproof performance of double-sealing gaskets is applied in a super-large diameter shield tunnel to conduct water pressure resistance experiments on the inner and outer double-sealing gaskets considering bolt holes. Through these experiments, the waterproof performance of bolt-hole on double-sealing gasket systems is investigated. The results demonstrate the following: (1) The bolt holes control the overall waterproof performance of the double-sealing gaskets fixed on the inner and outer sides of the segmental joint. When they leak under insufficient waterproof capacity, the improvement in waterproof performance of double-sealing gaskets is less, compared to that when a single-sealing gasket is used. (2) The waterproof performance of double-sealing gaskets is considerably enhanced with sufficient waterproof performance of the bolt holes. (3) The waterproof performance of bolt holes should meet the collaborative waterproof requirements of double-sealing gaskets when applying them in super-large diameter shield tunnels.

Key words： shield tunnel; segmental joint waterproof; double-sealing gaskets; bolt-hole waterproof; high water pressure; waterproof test

Cite this article

ZHANG Wenjun , ZHOU Xinnan , ZHANG Gaole , HE Weiguo , YU Yong .

Experimental Study on Waterproof Performance of Double-Sealing Gaskets at Segmental Joints of Shield Tunnels

[J]. Tunnel Construction, 2024 , 44(9) : 1744 -1751 . DOI: 10.3973/j.issn.2096-4498.2024.09.003

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