高混凝土面板堆石坝接缝止水设计综述

Review on joint waterstops design of high concrete face rockfill dams

接缝止水是高混凝土面板堆石坝设计的关键技术问题之一。对国内外高混凝土面板堆石坝接缝止水设计研究进展进行了综述,主要包括止水变形控制标准与止水结构设计两大方面,对目前中国高混凝土面板堆石坝接缝止水结构设计的基本思路及工程实践进行了回顾。研究认为采用数值计算结合工程经验确定接缝止水变形控制标准是合适的。目前接缝止水的新技术集中在表层填料止水及其保护盖板、垂直缝柔性嵌缝材料等方面。混凝土面板堆石坝接缝止水后续研究的重点为表层止水结构创新、止水结构简化设计、防挤压破坏措施、止水耐久性提高方法和修复技术。

The joint waterstop is one of the key technical issues in the design of high concrete face rockfill dams(CFRD).In this paper,the domestic and abroad research progress on waterstop design of high concrete face rockfill dams was reviewed.Focusing on deformation control standard and structure design of waterstops,we mainly summarized the basic ideas and engineering cases of waterstops design of CFRD in China.It was believed that determining the deformation control standard of joint waterstop by numerical calculation combined with engineering experiences was appropriate.The innovation achievements have been concentrating in the surface filling waterstop and its protecting cover plate,and the flexible waterstop materials in vertical joints.The follow-up research of joint waterstop will focus on the structural innovation and simplified design,anti-extrusion failure measures,durability improvement methods and repairing techniques.