重力坝加高引发的问题及解决方法的研究

Research on Problems and Solutions in Heightening Gravity Dam

大坝的加高将成为未来水利建设的重点之一。工程实例表明:重力坝加高会带来坝体应力恶化、新老混凝土结合问题和新混凝土表面裂缝等问题,分析出现这些问题的主要原因,提出控制新坝体的温度应力,做好新老混凝土结合面的粘结等解决方法。展望重力坝加高的发展,认为具有满足社会需求的可行性。

The heightening technique of gravity dams will be one of the emphasis in the hydraulic construction in the future. Projiect shows：there are some problems in heightening gravity dam： worsening of dam stress, the combine between old and new concrete and surface cracks in newdam. This paper analyzes the main reasons of these problems, and proposes the solutions by controlling the new dam＇s temperature stress and combining old and new concrete bond. The development of heightening gravity dam, will have the feasibility in meeting the needs of the community.