江垭大坝坝体碾压混凝土钻孔测试

Core sample test of Jiangya RCC dam

在坝体钻孔取样进行物理力学测试和进行钻孔压水试验是评定碾压混凝土质量的综合方法。对江垭大坝坝体碾压混凝土共进行了４ 次坝体钻孔。由于江垭大坝施工机械配套、施工队伍有经验、施工管理水平较高、施工质量控制正规， 因而取得的抗剪断指标满足设计要求。对于大坝混凝土中的压水试验， 目前尚无专门规程， Ｌｕ 值在什么范围内为合格， 在什么范围内为优良， 没有明确规定， 这就给实际工作带来困难。今后进行这方面的研究很有必要。

The method of core boring in dam body for physical mechanics test and the water pressure test in borehole is the comprehensive method of evaluating the RCC quality. 34 borings have been made in the dam body of Jiangya dam. There are a complete of construction machinery, rich experience during construction phrase, high construction management level, good construction quality control in the Jiangya dam. The sampling under such conditions could meet the requirements of the design. For the water pressure test in dam concrete, there are no special specifications at present, which brings certain difficulties to the practice so it is necessary to conduct study on this aspect.