不同地层下盾构隧道变形与病害统计分析  

Statistical Analysis of Deformation and Disease of Shield Tunnel under Different Stratum Conditions

作　　者：张金红 刘兴旺[1] 孙政波 李瑛[1] 曹国强[1] Zhang Jinhong;Liu Xinwang;Sun Zhenbo;Li Ying;Cao Guoqiang(Zhejiang Province Institute of Architectural Design and Research Co.,Ltd.,Hangzhou 310058,P.R.China)

机构地区：[1]浙江省建筑设计研究院有限公司,杭州310058

出　　处：《地下空间与工程学报》2025年第1期320-328,338,共10页Chinese Journal of Underground Space and Engineering

基　　金：浙江省科技创新项目(2019R52035);浙江省建设科研项目(2018K119,2022K176)。

摘　　要：不同地层条件下,盾构隧道长期变形及病害现状有所差异。根据杭州典型地质条件,将隧道所处的地层归类为软黏土、上粉下软及粉砂土3种典型地层,并汇总了杭州地铁大量监测及实测数据,研究了不同地层条件下盾构隧道长期变形及病害现状规律。粉砂土地层中盾构隧道的水平收敛、竖向位移较小,上粉下软地层次之,而软黏土地层则相对较大。不同地层中管环渗漏水、管环破损、环间错台、环缝张开等病害发生概率及病害严重程度为:软黏土>上粉下软>粉砂土。粉砂土地层中极少出现漏泥沙、缺角/缺损、环间错台量/接缝张开量大于4 mm、道床脱开量大于1 mm等较为严重的病害。The long-term deformation and disease status of shield tunnel are different under different stratum conditions.According to the typical geological conditions of Hangzhou,the strata where the tunnel is located are classified into three typical strata,namely soft clay,upper layer-silty sand and lower layer-soft clay and silty soil.A large number of monitoring data and measured data of Hangzhou metro are summarized to study the longterm deformation and disease status of shield tunnel under different stratum conditions.The horizontal convergence and vertical displacement of the shield tunnel are small in the silty soil stratum,followed by upper layer-silty sand and lower layer-soft clay stratum,while the horizontal convergence and vertical displacement is relatively large in the soft clay stratum.The occurrence probability and severity of leakage,breakage,separation of track bed in shield tunnel ring and joint dislocation,joint opening between shield tunnel ring in upper layer-silty sand and lower layer-soft clay stratum is greater than in silty sand stratum,but less than in soft clay stratum.Relatively serious disease such as leakage of sediment,unfilled corner and defect,value of joint dislocation greater than 4mm,value of joint opening greater than 4mm,value of separation of track bed greater than 1mm are rare in silty sand stratum.

关 键 词：不同地层 盾构隧道 长期变形 病害现状 统计分析 

分 类 号：TU93[建筑科学—结构工程]