富浆胶结砂砾石防渗保护结构施工工艺及质量控制方法

Research on the Construction Technology and Quality Control Method of Rich-slurry Cemented Sands and Gravels

针对常规胶结砂砾石耐久性不足的问题,根据"宜材适构"的筑坝理念,在胶结砂砾石中增加胶结材料用量,形成富浆胶结砂砾石作为坝体的防渗保护结构。结合国内第一座胶结砂砾石永久性工程——四川省顺江堰引水枢纽工程,进行了富浆胶结砂砾石防渗保护结构的骨料生产、拌和、运输、仓面作业等施工工艺研究,并分析总结了材料、拌和以及仓面质量控制的指标及措施。研究得到了一套适用于胶结砂砾石坝防渗保护结构的施工工艺和质量控制方法并成功应用,对指导该坝型的建设和推广具有重要意义。

In view of the problem of insufficient durability of conventional cemented sand and gravel（ CSG）,according to the concept of＂structure should adapt to material＂,the rich-slurry CSG is formed as the protective structure of the dam by increasing the amount of cementitious material.Based on the first permanent CSG dam of Shunjiang Weir Diversion Project in Sichuan Province,this paper studies the production,mixing,transportation and storehouse construction technology of rich-slurry CSG.Meanwhile,the quality control indicators and methods of the materials,mixing and storehouse of rich-slurry CSG are analyzed and summarized.A set of construction technology applicable to the anti-seepage protection structure of CSG dam has been developed and applied successfully,which is of great significance to guiding the construction and promotion of the dam.