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

doi:10.3973/j.issn.2096-4498.2024.09.003

Tunnel Construction ›› 2024, Vol. 44 ›› Issue (9): 1744-1751.DOI: 10.3973/j.issn.2096-4498.2024.09.003

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

ZHANG Wenjun^{1, 2}, ZHOU Xinnan¹, ZHANG Gaole¹, HE Weiguo³, YU Yong³

(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:2024-09-20 Published:2024-10-12

Abstract

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

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.

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

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