三点击实试验法在工程中的运用

Application of Tamping at Three Points to the Engineering

影响土石坝的质量关键因素之一在于土石坝防渗体施工的质量,一般设计要求采用压实度D及填筑含水量与最优含水量的差值作为质量控制指标,然而用常规的室内标准击实试验求最大干密度及最优含水量,试验时间至少两天,以此进行现场施工质量控制显然是不现实的.采用"三点击实"试验法,又称"快速击实控制法"基本上解决上述矛盾.通过从三点击实试验法的原理和方法入手,详细论述了三点击实试验法的具体应用过程.

The construction quahty of impermeable Darner ot the earth-rocfill crams is one of the critical factors that affect the quality. The difference between the impermeable barriers （D） or filled soil water content and optimum moisture content is adopted as the quality controlling index. It is unpractical to control the on-site construction quality with the routine indoor standard tamping experimentation because the time of the experimentation requires at least two days getting the maximum dry density and the optimum moisture content. However,the tamping at three points,also called quickly tamping control method, can solve this problem. According to the principle and method of tamping at three points, its application process is described in detail.