和燕路隧道盾构防水密封垫极限防水性能试验研究  

Experimental Study on Extreme Waterproof Performance of Waterproof Gasket of Heyan Road Shield Tunnel

作　　者：薛光桥[1,2] 郭志明 李拼 谢宏明 王士民[4] XUE Guangqiao;GUO Zhiming;LI Pin;XIE Hongming;WANG Shimin(China Railway Siyuan Survey and Design Group Co.,Ltd.,Wuhan 430063,Hubei,China;National Engineering Research Center of Underwater Tunnelling Technology,Wuhan 430063,Hubei,China;Nanjing Public Project Construction Center,Nanjing 210019,Jiangsu,China;Key Laboratory of Transportation Tunnel Engineering,Ministry of Education,Southwest Jiaotong University,Chengdu 610031,Sichuan,China)

机构地区：[1]中铁第四勘察设计院集团有限公司,湖北武汉430063 [2]水下隧道技术国家地方联合工程研究中心,湖北武汉430063 [3]南京市公共工程建设中心,江苏南京210019 [4]西南交通大学交通隧道工程教育部重点实验室,四川成都610031

出　　处：《隧道建设（中英文）》2020年第9期1272-1278,共7页Tunnel Construction

基　　金：南京市工建中心长江隧道项目(HYL-2018-Z010)。

摘　　要：为对超出设计允许张开量、错台量情况下的盾构隧道接缝防水性能进行评价,探究满足防水要求的密封垫极限张开量、错台量,基于南京和燕路长江隧道工程,选取设计的2种密封垫开展极限张开与极限错台工况下的防水试验,得到密封垫在张开量与错台量超出设计允许值后其防水性能的变化规律。(1)在密封垫张开量超过设计允许张开量后,密封垫防水性能随张开量的增大逐步减小,且减小幅度随着张开量的增大逐渐增大。(2)错台量超过设计允许错台量后,随着错台量的增大,密封垫的耐水压能力总体呈波动式减小的趋势,直至错台量达到某一临界值,其防水性能迅速下降,直至失效。对于存在张开量与错台量超出设计允许值风险的水下盾构隧道,建议在设计时考虑其在极限工况下的防水性能。In order to evaluate the waterproof performance of the shield tunnel joint under the conditions that opening amount and dislocation exceed the design allowance,the limited opening amount and dislocation displacement of shield tunnel are discussed so as to meet the waterproof requirements.And then two kinds of gaskets are selected to carry out waterproof test under the conditions of extreme opening amount and extreme dislocation displacement based on the Nanjing Heyan Road Tunnel Project.The variation rules of the gasket waterproof performance under the conditions that opening amount and dislocation exceed the design allowance are obtained as follows:(1)The waterproof performance of the gasket decreases gradually with the increase of the opening amount,and the decreasing range increases gradually with the increase of the opening amount.(2)With the increase of the dislocation displacement,the waterproof performance of the gasket shows a general trend of decreasing by fluctuation until it reaches a critical value,after the dislocation displacement exceeds the critical value,its waterproof performance will rapidly decrease until it fails.For underwater shield tunnels with a risk of opening amount and dislocation displacement exceeding the designed values,it is recommended to consider its waterproof performance under extreme conditions in the design.

关 键 词：盾构隧道 防水密封垫 张开量 错台量 极限防水性能 

分 类 号：U455.43[建筑科学—桥梁与隧道工程] U453.6[交通运输工程—道路与铁道工程]