工程地质学报2026，Vol.34Issue(2)：463-474,12.DOI:10.13544/j.cnki.jeg.2024-0126
基于物理力学属性的黄土结构性参数研究
A STRUCTURAL PARAMETER STUDY CONSIDERING PHYSICAL AND MECHANICAL PROPERTIES OF LOESS
摘要
Abstract
Density,saturation,and void ratio are fundamental physical properties of soil,while strain energy,strength,stress,and strain represent its mechanical characteristics.Factors such as confining pressure and loading rate significantly influence soil behavior.Based on the concept of shear strain energy,a structural parameter derived from shear strain energy was proposed.This parameter defines soil structure by integrating both physical and mechanical property parameters;the relevant expressions were derived and subsequently validated.The parameters in the expression were calibrated using laboratory test results,yielding a structural characterization model.Using the structural parameter expression,an incremental expression for structural degradation was derived,and the degradation process during wetting-loading was explored.The results show that in the initial state,the soil structure during triaxial shear exhibits an exponential relationship with saturation and an inverse relationship with density.The influence of saturation and porosity on loess structure(i.e.,the slope of the ln E*-Sr curve)is negligible under varying confining pressures and loading rates.The reference structure(the intercept of the ln E*-Sr cu rve)increases with increasing confining pressure.During the loading and wetting process,the structural parameter decreases monotonically with increasing saturation and deformation until the soil is destroyed and the structure is completely degraded.关键词
黄土/结构性参数/物理属性/力学属性/增湿加载过程/结构退化Key words
Loess/Structural parameters/Physical properties/Mechanical properties/Humidification loading process/Structural degradation分类
建筑与水利引用本文复制引用
刘恒杰,许领,伏映鹏..基于物理力学属性的黄土结构性参数研究[J].工程地质学报,2026,34(2):463-474,12.基金项目
国家重点研发计划项目(资助号:2018YFC1504701).This research is supported by the National Key R&D Program of China(Grant No.2018YFC1504701). （资助号:2018YFC1504701）
