CSG在老挝南欧江五级水电站围堰施工中的应用

利用胶凝砂砾石(CSG)浇筑坝体是近年来兴起的一项新型筑坝技术。以老挝南欧江五级水电站纵向围堰施工为例,介绍利用电站坝址上下游河道的天然河滩料作为CSG骨料,并添加少量的胶凝材料,通过类似于RCC施工方法进行纵向围堰施工。工程完工后的取样分析结果及度汛情况表明,采用CSG筑坝在工程安全上是可行的,同时由于大幅缩短了工期,创造了较为可观的经济价值,相关经验可供类似工程借鉴。

Application of cementitious sand gravel in cofferdam construction:case of 5 th cascade Hydropower Station at Nam Ou River in Laos

The cementitious sand gravel technology (CSG) is a new dam construction technique in recent years. Taking the longitudinal cofferdam construction of the 5th cascade Hydropower Station on Nam Ou River in Laos as a case, the natural shoal mineral materials of upper and lower river reaches near the Hydropower Station are used as the coarse aggregate with a spot of cementing materials, and the construction was conducted in a method similar to RCC construction. The sampling results after construction completion and flood operation situation indicate that CSG is feasible in ensuring the engineering safety and can create significant economic value through shortening the construction period, which provide reference for the similar projects.