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针对水库砌石重力拱坝,由于受当时施工技术水平、建设理念等因素的综合制约,坝体存在砌石局部架空、砌筑质量差密实度较低、充填胶结水泥砂浆密度性差,运行中存在坝基、坝体和坝肩多处渗漏等问题。根据大坝渗漏现状和钻探分析资料,结合安全复核成果,优选水泥砂浆充填灌浆为主的防渗补强除险加固方案进行防渗加固处理。经测试32个试验段透水率均控制在5lu范围内,合格率达100%,大坝渗漏得到成功处理。
In view of the comprehensive control of the construction masonry gravity dam and the construction idea at the time, the masonry has some problems such as partial overhead masonry, poor masonry quality, low density density of cemented cement mortar, Dam foundation, dam and dam shoulder leakage and other issues. According to the status of the seepage of the dam and the drilling analysis data, combined with the results of the safety review, the seepage prevention and strengthening reinforcement program that is mainly based on grout filling of cement mortar is preferred for seepage control and reinforcement. After testing 32 experimental sections of water permeability are controlled within the range of 5lu, pass rate of 100%, the dam leakage has been successfully processed.