在运用γ射线透射法测量大型滑坡模型土壤含水量的过程中,为了提高试验的精度,综合分析了影响γ射线透射法测量精度的多种因素。其中,重点分析了水的质量吸收系数μ对测量精度的影响以及影响μ值准确性的各种客观因素。针对大型滑坡模型试验的特殊条件,对位于滑坡模型土壤不同深度处的观测点取与之对应的相同水深处实测的μ值来处理试验数据,以利于提高精度。实践结果表明,这一处理方法对于提高试验的精度是有效的。 In the process of measuring the soil water content of large-scale landslide model by γ-ray transmission method, in order to improve the accuracy of the experiment, a variety of factors affecting the measurement accuracy of γ-ray transmission method are comprehensively analyzed. Among them, the emphasis is put on the influence of the water mass absorption coefficient μ on the measurement accuracy and various objective factors that affect the accuracy of the μ value. According to the special conditions of the large scale landslide model test, the measured data at the same water depth corresponding to the observation points located at different depths of the soil in the landslide model are used to improve the precision. Practical results show that this method is effective to improve the accuracy of the test.