击实试验标准不同对试验结果的影响

The Effects of Different Hitting Test Standards on Test Results

分析了土的击实原理和压缩特性对现场碾压试验、室内压缩试验和击实试验的影响,选用击实功基本相同的大筒和小筒两种重型击实试验标准,对9组填料进行对比试验,结果表明:在单击功不变的情况下,击实次数与土体变形存在着非线形关系。用增加击实次数或改变落锤高度,使试样的单位体积击实功趋于一致的做法,与实际试验结果有一定的误差。

This paper analyses the effects of hitting theory and compression characteristics of the soil on the field rollingpress test, indoor compression test and hitting test, and compares the test results of nine groups of filled material by adopting two heavy hitting test criterions of bigcanister and smallcanister with the same hitting work. It is found that there is a nonlinear relationship between the hitting times and the soil distortion with the same single hitting work. That increasing the hitting times or changing the height of dropping hammer to make the hitting work of per unit volume of the sample tend be the same is not identical to the actual testing results.