大坝砾石土防渗心墙填筑质量快速检测方法研究

Research on Rapid Detection Method for Filling Quality of Impervious Core Wall with Gravelly Soil in Dam

针对长河坝水电站砾石土心墙填筑压实质量需要,用全料压实度和细料压实度进行双控的质量快速检测控制,通过系列比较试验和分析,提出了一种砾石土填筑压实质量控制的快速检测方法。与常规标准检测方法所得结果相比,各项检测指标偏差完全在试验规程允许误差范围内。本方法简捷、快速、经济实用,可大幅缩短检测时间以满足高强度大方量填筑质量检测控制要求,大坝初期填筑应用结果表明本方法是一种砾石土填筑质量控制快速有效的检测方法。

According to the compaction quality of the gravelly soil filling for the core wall of Changheba Hydropower Sta-tion as well as the quality detection and control with full material compaction degree and fine material compaction degree , a rapid detection method for the compaction quality control of gravelly soil filling is proposed based on a series of compar-ative experiments and analysis .Compared with the results from conventional standard detection methods ,the deviation of each detection indexes of this method is within the scope of permissible error in the test procedure .The proposed method is simple ,rapid ,economic and practical ,with which the detection time can be greatly shortened so as to meet the quality detection and control requirements for high strength and large volume filling .The application results for early dam filling show that this method is a kind of fast and efficient detection method for the quality control of gravelly soil filling .