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以非饱和土张力计原理为基础,制作了一种新型的基质吸力量测装置,并通过实测过程的不断总结与改进,得到了一种成本低廉、制作简单、操作便利、试验快速和结果可靠的非饱和土基质吸力量测装置,以此装置测定了不同体积含水率、不同压实度和干湿循环后粉土的基质吸力变化规律,得到了不同压实度粉土的土-水特征曲线,并通过Origin软件中的Boltzmann模型进行拟合对比分析,得到了与压实度相关的土-水特征曲线,比较了不同压实度粉土的含水率变化对基质吸力的不同影响特点。试验结果表明,干湿循环对粉土的基质吸力和强度有很大影响。
Based on the principle of unsaturated soil tensiometer, a new type of matrix suction measuring device was made. Through the continuous summary and improvement of the measurement process, a new method of low cost, simple manufacture, convenient operation, fast test and reliable result Soil unsaturated sediment measuring device to measure the different volumetric moisture content, different compaction and wetting and drying cycles after the change of matrix suction of silt, obtained different compacted silt soil - water characteristics Curves and the Boltzmann model in Origin software were used for comparison and analysis. The soil-water characteristic curve related to the degree of compaction was obtained and the different influence on the soil suction of different compaction silts was compared. The experimental results show that the wetting and drying cycle has a great influence on the matrix suction and strength of silt.