最大干密度和最优含水率的准确性探讨

对土的压实原理做了简单论述 ,同时还提出了提高击实试验结果准确性时应注意的几个问题。介绍了击实规范中规定的击实标准及在实际工作中击实方法的选择 ;对试验时采用不同土样制备方法求得的最大干密度和最优含水率进行了比较和较透彻的理论分析 ;对击实功对最大干密度的影响做了一定的试验研究。同时 ,关于余土高度对最大干密度的影响 ,提出余土高度控制在3mm以内得到的结果比较理想 ,而且为了减少人为因素导致最大干密度和最优含水率产生的偏差 ,提出借助 Excel或插值函数计算法来处理室内标准击实试验数据。

Discussion on precision of biggest dry density and optimum water content

In this paper the principle of compaction test was simply discussed.Besides,several problems on precision in the indoors compaction test were putted up and discussed.The compaction standards and the selection of compaction standards in actual work were simply introduced;the biggest dry density and optimum water content for different method of prepared soils were compared and analyzed;based on the test,the influence for the biggest dry density was studied.Meanwhile,about the height of more soil,this paper presents that the result would be proper if the height can be under 3 mm to decrease the manual error for the biggest dry density and optimum water content,finally we should deal with the result through Microsoft Excel or interpolation function.