超大跨度隧道结构防排水设计与施工技术研究  

Waterproof and Drainage Design and Construction Technology of Super-Large-Span Tunnel Structures

作　　者：王星 贺维国 费曼利 宋超业 WANG Xing;HE Weiguo;FEI Manli;SONG Chaoye(China Railway Liuyuan Group Co.,Ltd.,Tianjin 300308,China;China Railway Tunnel Survey&Design Institute Co.,Ltd.,Tianjin 300133,China)

机构地区：[1]中铁第六勘察设计院集团有限公司,天津300308 [2]中铁隧道勘测设计院有限公司,天津300133

出　　处：《隧道建设（中英文）》2022年第7期1267-1273,共7页Tunnel Construction

摘　　要：为解决跨度大于30 m的超大型隧道结构防排水施工中铺设难、焊缝多、易掉落、质量不易控制等技术难点,提出一种“环纵导排系统+复合土工膜+喷涂高弹性涂膜防水层+自密实混凝土+接缝防水”组合的新型防排水体系。从排水角度介绍环纵排水盲管、凹凸排水板及泄水管等导排系统的设计组成、布置方式及可维护性设计;从防水角度介绍复合土工膜隔离防渗双重特性、喷膜防水层性能指标及喷涂设计、自密实混凝土结构及接缝防水设计、施工工艺及关键技术等内容。实践研究表明,该新型防排水体系能够适用于超大跨度隧道结构,施工安全可靠,施工工效高,综合性价比好,防水效果优良。Technical difficulties,such as difficult laying,multiple weld joints,easy falling,and difficult quality control,are always present in the waterproof and drainage construction of super-large tunnel structures with spans greater than 30 m.Therefore,a new waterproof and drainage system,composed of a ring and longitudinal drainage system,composite geomembrane,high-elastic film waterproof layer,self-compacting concrete,and joint waterproofing,is proposed.Furthermore,the design composition,layout,and maintainability design of the ring and longitudinal drainage blind pipe,concave-convex drainage plate,and drain pipe are introduced from the perspective of drainage.From the perspective of waterproof,the dual characteristics of isolation and anti-seepage of composite geomembrane,performance index and spraying design of sprayed membrane waterproof layer,waterproof design of the self-compacting concrete structure and joint,and construction key technologies are introduced.The practice results indicate that the proposed waterproof and drainage system can be applied to the super-large-span tunnel structures,resulting in safe and reliable construction,high work efficiency,and good waterproof effect.

关 键 词：超大跨度隧道 防排水 涂膜防水 复合土工膜 自密实混凝土 

分 类 号：U45[建筑科学—桥梁与隧道工程]