面板坝靠薄层混凝土面板作为主要防渗体,其接缝的止水就显得尤为重要,如果这些接缝发生大量渗漏,将会对工程的安全性和经济性产生严重影响。为提高面板坝周边缝的止水性能,分别从结构设计、止水原理及结构和材料不足等方面对面板坝周边缝几种典型止水结构型式进行对比分析,结果表明:高面板坝周边缝新型止水结构设计型式,既保留了各自结构的长处,又弥补了各自的不足,同时具有创新的特点。
Abstract
Thin concrete panels act as the main impervious body of CFRD (Concrete Face Rockfill Dam), and it is particularly important to prevent leakage at the panel seam joints. If a large amount of leakage occurs, the engineering safety and economy will be severely affected. In the aim of improving the sealing performance of surrounding joints of panels, we compared several typical sealing structures from aspects of structure design, sealing principle, deficiencies of structure and materials. Furthermore, we present a novel structure consisting five sealing levels for the surrounding joints of CFRD panels. Results reveal that the proposed structure retains the strengths of other structures, and also makes up for their deficiencies.
关键词
面板堆石坝 /
周边缝 /
止水结构 /
柔性填料 /
新型止水结构
Key words
CFRD /
peripheral joint /
sealing structure /
flexible packing material /
a new type of sealing structure
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