混凝土面板堆石坝面板接缝止水技术的发展与展望  

Development and prospect of slab joint waterstop technology of CFRDs

作　　者：徐耀[1] 郝巨涛[1] XU Yao;HAO Jutao

机构地区：[1]中国水利水电科学研究院北京中水科海利工程技术有限公司,北京100038

出　　处：《中国水利水电科学研究院学报》2018年第5期457-465,共9页Journal of China Institute of Water Resources and Hydropower Research

基　　金：国家重点研发计划项目(2017YFC0404805);中国水科院科研专项(SM0145B632017;SM0145B952017)

摘　　要：面板接缝止水是混凝土面板堆石坝发展进程中涉及的关键问题之一,对于混凝土面板堆石坝的安全至关重要。本文分析评述了国内外混凝土面板堆石坝面板接缝止水技术的发展,特别是近年来开发的表层止水机械一体化施工技术和涂覆型柔性盖板止水技术,可以有效解决传统止水技术存在的缺陷问题,显著提高了止水体系的安全性与可靠性。本文认为面板挤压破坏是高混凝土面板坝面板接缝止水必需应对的新问题,除采用软接缝措施减小面板压应变外,在潜在的挤压破坏区域设置加强防护涂层也是一种有效的办法,但根本措施还应从加强堆石体的变形协调以及坝体与面板之间变形同步协调控制、增强面板抗挤压破坏能力等方面着手。The slab joint waterstop is one of the key issues during the development of CFRDs,which is very important to the safety of CFRDs.In this paper,technical development of slab joint waterstop of CFRDs in the world has been reviewed and analysed,especially the integrated mechanical construction technology and the brush-coated flexible waterstop technology that have been developed in recent years.These two new technologies can effectively overcome the defects of the conventional waterstop and improve the safety and reliability of the whole waterstop system.It is pointed out that,the compressive spalling of concrete face is the new problem associated with slab joint waterstop of high CFRDs.In addition to the measures of soft vertical joint to reduce the compressive strain in the face,the protection coating over the potential compressive spalling area is also an effective method,but the essential measures still lies in the two aspects of controlling deformation compatibility of rockfill itself and also together with concrete face as well as improving concrete face resistance to the compressive spalling.

关 键 词：混凝土面板堆石坝 面板接缝止水 GB塑性填料 涂覆型柔性盖板止水 

分 类 号：TV641.4[水利工程—水利水电工程]