挂网喷钢纤维混凝土防渗层在CSG坝中应用研究  

Application of the Mesh Sprayed Steel Fiber Concrete Impervious Layer in Cemented Sand and Gravel Dams

作　　者：彭云枫[1] 秦江海 吕稳[1] 

机构地区：[1]三峡大学水利与环境学院,湖北宜昌443002

出　　处：《水电与新能源》2016年第11期21-26,共6页Hydropower and New Energy

基　　金：湖北省自然科学基金资助项目(2014CFB235)

摘　　要：针对在胶凝砂砾石坝中,筑坝所选用的胶凝砂砾石材料属于干贫混凝土,胶凝材料用量较少,坝体抗渗能力一般无法满足抗渗稳定的要求,必须设计单独的防渗结构的问题,分析了钢纤维混凝土抗渗、抗拉等物理力学性能特点,从允许水力坡降的角度出发,提出了在CSG坝中单独采用钢纤维混凝土结构作为主要防渗方式的构想,推荐给出了在一定条件下喷射钢纤维混凝土防渗层的厚度公式,并从喷射工艺及经济性的角度分析了实际应用的可行性。In the cemented sand and gravel（ CSG） dam,the dam material is one kind of dry lean concrete with relatively small usage of cementing material. The permeability resistance of the dam body is usually not enough compared to the anti-seepage stability requirement. Considering the specific physical and mechanical properties of the steel fiber concrete,it is proposed to adopt the steel fiber concrete structure in CSG dams as the main anti-seepage measure. Calculation formula is given for the mesh sprayed steel fiber concrete impervious layer under certain conditions. Practical application issues such as the spray technology and its economic efficiency are also discussed.

关 键 词：CSG坝 钢纤维混凝土 抗渗性能 允许水力坡降 湿喷法 

分 类 号：TV641[水利工程—水利水电工程] TU528.572[建筑科学—建筑技术科学]