核子仪法与环刀法测量土的湿密度和含水量的比较和标定试验研究

为确定湿密度偏移量和含水量偏移量，探讨了核子仪现场的标定方法。采用环刀原位取样法来标定核子仪的湿密度和含水量的偏移量，并将环刀法与核子仪法测量结果进行比较，分别计算核子法测量土的湿密度和含水量与环刀法测量土的湿密度和含水量之间的相关系数，其相关系数不应小于0．900。将确定的湿密度和含水量的偏移量输入仪器中，仪器即可进行现场测量。结果表明：采用标定后的核子仪进行现场测量，可提高测量的准确度，缩短测量时间，使用核子仪法测量一个点只需4～5min，而且不会破坏碾压层；同时减少了现场试验工作量，司加快施工进度。

Studies on How to Measure Soil Wet Density and Water Content Comparison and Indication

This paper mainly studies the standard method of nucleon instrument and makes result analysis.It confirms the wet density of the nucleon instrument and skew amount of the water content.Standard method:using the method of a round knife,the wet density of the nucleon instrument and skew amount of the water content can be confirmed.Namely choosing samples in the building site and carrying on measurement with the method of nucleon instrument,the result is written down.Comparing the result of method in using a round knife with the result of the method of nucleon instrument,the correlation coefficient between the wet density of the nucleon instrument and skew amount of the water content is calculated. The correlation coefficient should not be smaller than 0.9. It confirms the wet density of the nucleon instrument and skew amount of the water content.The instrument can carry on measurement on-the-spot.