Waterproofing performance of longitudinal segmental tunnel joints under external loads:a full-scale experimental investigation

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外文摘要：When subjected to external loads from the ground and nearby construction,tunnel segmental lining joints are prone to damaging deformation.This can result in water leakage into tunnels,posing great safety risks.With this issue in mind,we conducted a series of full-scale tests to study the effects of external loads on the waterproofing performance of longitudinal joints.A customized rig for testing segmental joints was developed to assess the effect of loading magnitude,eccentricity,and loading-unloading-reloading cycles on waterproofing performance.Additionally,the relationship between joint force,sealing gasket deformation,and waterproofing pressure was investigated.The results indicate that:(1) the sealing gasket's compression rapidly decreases as external loads increase,which weakens the waterproofing capacity of the joint;(2) the watertightness limit dramatically decreases as the bending moment increases;(3) a loading-unloading-reloading cycle leads to degradation of the joint's waterproofing performance.The findings of this study provide a reference for subsequent waterproofing design of segmental tunnel joints,helping ensure the safety of tunnels throughout their operational lifespans.

外文关键词：

Segmental tunnelWaterproofing performanceFull-scale experimentLongitudinal joint

作者：

Dongmei ZHANG、Sirui CHEN、Zhongkai HUANG、Zhaoyuan ZHANG、Long SU

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作者单位：

Key Laboratory of Geotechnical and Underground Engineering of Ministry of Education,Tongji University,Shanghai 200092,China

Department of Geotechnical Engineering,College of Civil Engineering,Tongji University,Shanghai 200092,China

Chine Railway 14th Bureau Group Mega Shield Construction Engineering Corporation Limited,Jinan 250014,China

出版年：

2024

DOI：

10.1631/jzus.A2400354

浙江大学学报(英文版)(A辑:应用物理和工程)

浙江大学

浙江大学学报(英文版)(A辑:应用物理和工程)

CSTPCD

影响因子：0.556

ISSN：1673-565X

年,卷(期)：2024.25(12)