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石门水利水电枢纽工程位于西峡县境内的丹江支流老灌河上,控制流域面积25.8万hm~2,水库总库容8910万m~3,拦河坝为浆砌石重力坝,坝顶高程297m,最大坝高58m。为提高地基的承载力,坝基采用固结灌浆进行处理。灌浆施工安排在坝基0.8m厚垫层砼强度达到设计强度的50%以上时进行。为加快施工进度,提高工效,保证施工质量,本工程岸坡段固结灌浆采用预埋管法施工。具体施工方法及优点如下:
Shimen Water Conservancy and Hydropower Project is located in Xijia County, the mainstream of the Dan River tributary of the Dan River, the control basin area of 258,000 hm ~ 2, the total reservoir capacity 89,100,000 m ~ 3, the dam is a masonry gravity dam, crest elevation 297m, the maximum Dam height 58m. In order to improve the bearing capacity of the foundation, the dam foundation is treated with consolidation grouting. Grouting construction arrangements in the dam foundation 0.8m thick cushion concrete strength reaches more than 50% of the design strength. In order to speed up the construction progress, enhance the work efficiency and ensure the construction quality, the consolidation grouting in bank slope construction of the project adopts the method of embedded pipe construction. Specific construction methods and advantages are as follows: