Application of Artificial Medium Coarse Sand Filter Material in Rock-fill Dam with Clay Core

Application of Artificial Medium Coarse Sand Filter Material in Rock-fill Dam with Clay Core

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The Qianjiang sub-dam of the Datengxia Water Conservancy Project is a rock-fill dam with clay core, in which the fine-grained filter material between the clay core and the folk rivet sweat rock in the dam shell is selected from the artificial medium coarse sand produced by the engineering sand and gravel system.Since the quality of the clay core is directly affected by the performance of the filter material and the filling, it is necessary to inspect the performance of the raw material before the filter material filling and conduct filling and rolling tests after passing the inspection.Based on the test results, the optimal rolling parameter combination for artificial medium coarse sand filter material was determined to be a 40 cm layer thickness and 4-time rolling.According to the review test results after construction, the medium coarse sand filter layer constructed under the sequal eclipse 5 battery recommended parameters is qualified.

The leakage detection results during the operation of the Qianjiang sub-dam show that there is no abnormal leakage in the dam body.