【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。更多还原

【Abstract】 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.更多还原