土石坝低弹模混凝土防渗墙设计关键技术

针对土石坝混凝土防渗墙受力变形机理研究，通过大量室内低弹模混凝土材料性能试验，提出了土石坝混凝土防渗墙性能指标的技术要求，以及结构计算、厚度确定、土石坝设置低弹模混凝土防渗墙后上游坝坡稳定计算等方面的设计方法。研究成果已应用于桥下、坂头等水库除险加固工程实践中，原型观测结果表明工程防渗加固效果良好。

Key technologies for design of low elastic modulus concrete cut-off wall in earth-rockfill dam

Aiming at the study on the stress and deformation mechanism of the concrete cut-off wall for earth-rockfill dam， the technical specifications for the performance indexes of the concrete cut-off wall in earth-rockfill dam as well as the design methods in the aspects such as structural calculation， determination of thickness， calculation on the stability of the upstream dam slope after building the cut-off wall， etc. are put forward through a large number of indoor tests made on the material performance of low elastic modulus concrete. All the study achievements have already been applied to the engineering practices of the risk-elimination and reinforcement projects of the reservoirs of Yuqiaoxia， Bantou， etc. The prototype observations demonstrate that better anti-seepage reinforcement effects have been got as well.