西北工程技术学报2025，Vol.24Issue(2)：163-170,8.
硫酸盐渍土未冻水体积含水率影响因素及预测分析
Influencing Factors and Prediction Analysis of the Volumetric Unfrozen Water Content in Sulfate Saline Soil
摘要
Abstract
The volumetric unfrozen water content is a key parameter in studying water migration and freezing-thawing processes in frozen soil,and exhibits a complex nonlinear relationship with influencing factors.Utilizing the Frequency Domain Reflectometry(FDR)method,this study monitored the changes of volumetric unfrozen water content and temperature over time during the freezing-thawing processes in sulfate saline soil,analyzed the variation patterns and influencing factors of volumetric unfrozen water content under different initial volumetric water content conditions,and established a prediction model based on Support Vector Machine(SVM)principles.The results show that at the ice-water phase transition point,soil samples with different initial water contents exhibit distinct sudden changes in both soil temperature and volumetric unfrozen water content.When the salt content is constant,the changes in volumetric unfrozen water content in soil samples varying water contents can be divided into three stages:intense phase transition,transition,and frozen.When the temperatures are same,higher initial water contents lead to greater volumetric unfrozen water content and increased sensitivity to temperature changes.Overall,the volumetric unfrozen water content is positively correlated with the initial water content,salt content,and temperature.The prediction model for volumetric unfrozen water content demonstrates high accuracy and effective performance,meeting the accuracy requirements for predicting volumetric unfrozen water content in sulfate saline soil.关键词
硫酸盐渍土/未冻水体积含水率/支持向量机/含水率/温度Key words
sulphate saline soil/volumetric unfrozen water content/support vector machine/water content/temperature分类
建筑与水利引用本文复制引用
王瑜,张卫兵..硫酸盐渍土未冻水体积含水率影响因素及预测分析[J].西北工程技术学报,2025,24(2):163-170,8.基金项目
宁夏自然科学基金项目(2024AAC03070) （2024AAC03070）
宁夏回族自治区教育厅高等学校科学研究项目(NYG2024003) （NYG2024003）
