灵敏度在土结构性定量化研究中的应用

Experimental Study on the Application of Sensitivity in Quantitative Study of Soil Structure

根据近年来土结构性定量化研究中的新进展,定义了土在变形过程中的两种灵敏度——应力灵敏度和应变灵敏度。以西安黄土为研究对象,分别制备不同深度的原状和重塑饱和试样进行固结试验,得到规律性相对比较稳定的两种灵敏度。对两种灵敏度曲线的形态及其对应的土在变形过程中的结构性的变化进行了分析,初步认为无论从求取的方便性还是规律的稳定性来说,应变灵敏度具有更大的优越性。

According to the recent advancements in quantitative study on soil structure, two sensitivities, of clay in conventional soil mechanics, stress sensitivity and strain sensitivity, are explicitly defined in this paper. Taking Xi＇an loess as the study subject, both undisturbed and reconstituted saturated samples from different depths are prepared for 1-D consolidation testing. Through the trial calculations, two sensitivities are obtained from the e-logP coordinates which are have relatively stable changing tendency. Contrasting with the stress sensitivity, the strain sensitivity has obvious advantages from the points of view of calculation and changing tendency.