γ射线透射法在滑坡模型土壤水分测量中的应用

Application of γ transmission method in moisture measurement of landslide model

在滑坡模型试验中,多采用γ射线透射法测定模型土壤含水率,该方法虽然精度较高,但若方法使用不当、测量方案及控制参数选取不合理,其测量误差亦较大。为解决测量精度误差问题,对γ射线透射法土壤水分测量系统进行了一系列性能及测量精度影响因素的试验研究,分析认为:测量及计算参数的选择、试验材料特性,试验土体的干密度、体积含水率等均对测量精度产生影响。为今后试验的开展及对试验结果的处理提供了参考依据。

γ transmission method is often adopted in the landslide model tests to determine the soil moisture content.Errors of measurement are relatively obvious if improper method and unreasonable measurement program and controlling parameters are adopted.In order to handle the accuracy error of measurement,a series of test studies of influencing factors for performance and measurement accuracy is conducted towards the system of soil moisture based on γ transmission method.The results show that the choice of measurement and calculating parameters,test material properties,dry density of soil body and volumetric moisture content all have an influence on the measurement accuracy.It can provide a reference for carrying out tests and processing test results.