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随着科学技术的飞速发展,高分子合成材料在水电工程中的应用越来越广泛,尤其是对解决坝工建筑中的某些难题,更显得作用显著。本文就陈村、纪村两座水电工程自70年代以来应用合成材料的情况及效果,作综合分析研究。1 坝基防渗灌浆1.1 陈村大坝7～17坝段的坝基,处于F_(11)、F_(31)、F_(32)三条大断层的上、下盘或交汇带上,由于沿断层上盘一侧影响带岩体被切割成大小不等的岩块,众多裂隙构成曲折迂回的集中渗漏强透水区,并与上游水库贯通,坝基渗漏状况十分复杂。该部位原设主、副水泥帷幕各一排,后又增设水泥补强帷幕一排,完工后经插孔检查,发现幕体仍有30%～40%的孔段单位吸水率ω值为0.01～0.05l/(min·m·m),最大达
With the rapid development of science and technology, polymer composites have become more and more widely used in hydropower projects, especially for some problems in dam construction. In this paper, Chencun, Ji Village, two hydropower projects since the 1970s the application of synthetic materials and the effect of for a comprehensive analysis. 1 Dam foundation seepage prevention grouting 1.1 Dam foundation of Chencun Dam 7 ~ 17 is located on the upper and lower plate or intersection of three large faults F_ (11), F_ (31) and F_ (32) On the one side of the plate, the rocks with the rock mass are cut into rock blocks of different sizes. Many of the fractures form a tortuous roundabout concentrated seepage permeable and permeable zone. The seepage through the dam foundation is very complicated. The site was originally designed for the main and secondary cement curtain in a row, and then add a row of cement reinforcement curtain, after completion of the jack inspection and found that the screen body is still 30% to 40% of the hole water absorption unit value of 0.01 ~ 0.05l / (min · m · m), up to the maximum