Analysis of Influencing Factors and Countermeasures for Experimental Determination of Soil Moisture Content Index

Due to early geological movements, the formation of rock layers near the surface of the Earth's crust varied. In the later stages, intact rock layers were repeatedly subjected to external forces, resulting in varying degrees of damage. Additionally, during physical and chemical weathering, the properties of soil and rock materials in different regions of the Earth's surface showed certain differences. Therefore, in civil engineering construction, it is necessary to test the performance indicators of soil and rock in different regions in order to provide reliable basis for civil engineering design and construction. As an important physical property index of geotechnical materials, the testing process of soil moisture content is prone to some human or instrument equipment problems, which can affect the reliability of moisture content index determination. In the teaching of soil mechanics physical and mechanical performance index experimental courses in various higher education institutions, it is necessary to guide students to take some technical measures in testing experiments, enhance the sense of responsibility and standardized operation of testing personnel, and by formulating experimental plans and guidance documents, while following the various operational requirements of geotechnical testing regulations, accurately judge the type of rock and soil, correctly collect experimental samples, standardize the use of instruments and equipment, carry out experiments step by step, accurately weigh, scientifically read, set reasonable drying times, and use multiple sets of data averages. For the testing of moisture content indicators of special soil types in some areas, specialized methods can be used for experimental operations to avoid human operation errors and minimize experimental errors, thereby achieving ideal and efficient soil mechanics experimental goals.