郑州地铁管片渗漏水规律及治理措施研究  

STUDY ON THE PATTERNS AND REMEDIATION MEASURES OF SEGMENT WATER LEAKAGE IN ZHENGZHOU METRO

作　　者：黄春晖 范东方 许啸鹏 HUANG Chunhui;FAN Dongfang;XU Xiaopeng(Zhengzhou Rail Transit Co.,Ltd.,Zhengzhou 450047,China)

机构地区：[1]郑州地铁集团有限公司,郑州450047

出　　处：《低温建筑技术》2024年第12期107-110,114,共5页Low Temperature Architecture Technology

基　　金：2022年郑州地铁集团有限公司科研项目(ZZGD-07AFY-W22262)。

摘　　要：随着运营里程的增加,郑州地铁盾构隧道管片渗漏水问题日益突出。采用现场调查手段,对郑州地铁盾构隧道施工期、运营期管片渗漏水分布特征及原因进行分析。调查数据表明,管片渗漏水类型主要为湿迹和渗水;渗漏发生位置主要为环缝、纵缝及环纵缝交接的T字缝处;渗漏水产生的原因与区间平面线型、穿越的地层条件、管片接缝变形等因素密切相关。针对导致防水密封垫性能降低的施工期管片接缝变形问题,采用数值模拟手段,对管片壁后同步注浆浆液初凝点位置、千斤顶推力、螺栓预紧力等主要施工因素进行了影响分析。研究结论表明,控制施工期管片上浮变形最有利的措施是减小浆液初凝点与盾尾之间的距离。针对已成型隧道管片的环、纵缝渗漏水,可采用接缝注浆止水、管片壁后二次注浆等治理措施。With the increasing operational mileage,water leakage issues in segment joints of the Zhengzhou metro shield tunnels have become increasingly prominent.Through field investigations,the distribution characteristics and causes of water leakage in segment joints during both the construction and operational phases were analyzed.The investigation data reveal that the main types of leakage are damp patches and seepage,predominantly occurring at circumferential joints,longitudinal joints,and T-shaped intersections of circumferential and longitudinal joints.The causes of leakage are closely related to factors such as the alignment of the tunnel section,geological conditions,and deformation of segment joints.To address the deformation of segment joints during construction,which reduces the performance of waterproof gaskets,numerical simulations were conducted to analyze the impact of key construction factors,including the initial setting point of synchronous grouting behind the segment wall,jack thrust,and bolt pre-tightening force.The findings indicate that reducing the distance between the initial setting point of the grouting material and the tail of the shield is the most effective measure to control segment uplift deformation during construction.For water leakage at circumferential and longitudinal joints in completed tunnel segments,remediation measures such as joint grouting for water sealing and secondary grouting behind the segment wall can be adopted.

关 键 词：地铁管片渗漏水 盾构隧道 管片接缝 螺栓预紧力 

分 类 号：TU761.11[建筑科学—建筑技术科学]