混凝土重力坝全面治理方案研究

Research on comprehensive treatment method of a concrete gravity dam

我国东北地区某混凝土大坝经过数十年的运行,已出现多种病害,严重影响大坝的安全运行。本文提出将已在国内工程实践中取得成功应用经验的浮式拱围堰技术应用于大坝的上游面治理,在不放空水库的前提下为上游面的治理提供"干作业"施工环境,分别针对大坝上游面、下游面和竖直纵缝这三大重点部位提出有针对性的综合治理加固方案,以有效增强大坝的防渗结构,提高大坝的抗滑稳定性,改善大坝的整体性和应力状态,并使大坝的耐久性得到大幅度提高。

After several ten years of operation,various diseases have emerged in a concrete dam in North-east China,which has been threatening the safety of the dam. In the paper,the technique of floating archcoffer was proposed to be applied to the treatment of the dam upstream face,which had been used success-fully in a project in China. In the case,the treatment construction of the dam upstream face can be pro-cessed in dry environment. Then the comprehensive treatment and strengthening methods of the upstreamface,the downstream face and the vertical longitudinal joint were put forward to strengthen the imperviousstructure and the stability against sliding of the dam,to improve the integrity,the stress situation and thedurability of the dam.