Key Construction Technology Research Of Sanyuan Xijiao Reservoir Loess Soft Dam Foundation

Sanyuan Xijiao reservoir is a uniform earth Dam which was constructed in the loess foundation with high water table, so the dam foundation dewatering is the main technique of the project, digging up soft clay of the dam foundation after dewatering and reducing the water in the clay which was filled in dam are also techniques of the project. In this paper, mainly based on arranging data with well pumping tests in dam foundation and sum up the laws of flows under the condition of deep well pumping, the useful dewatering calculation model and parameters were set up. Secondly, based on the well constructing technique which was discovered under the condition of in-situ bumping test and calculating the dewatering scheme of the two dewatering units with the calculation model, the final dewatering scheme was put forward. At last, the final dewatering scheme was appraised by observation during the construction, and it satisfied with the construction request.As well as the researches with digging up soft clay of the dam foundation after dewatering and reducing the water in the clay were taken in this paper.