在冻土科研和冻土工程中,需要很好的掌握冻土中含水量资料。过去利用烘干法分析冻土中的水份,需要取土样,手续麻烦,工作量很大,又不能连续观测水份迁移等情况,很难适应大规模工程建设的要求。近年来用电导率法测水,但对冻土上常遇到的饱和状态和冻结状态的含水量不能测定,在冻土上使用也受到限制。用“中子测水法”,可以 In the frozen soil research and frozen soil engineering, the need to have a good grasp of the moisture content of frozen soil information. In the past, the use of drying method to analyze the moisture in frozen soil required to take soil samples, the procedure was troublesome, the workload was heavy, and the continuous observation of water migration could not be conducted, which made it difficult to meet the requirements of large-scale construction. In recent years, water conductivity is measured by conductivity method. However, the saturated and frozen water content often encountered on frozen soil can not be measured, and the use of frozen soil is also limited. With “neutron measurement method”, you can