岩土力学2025，Vol.46Issue(5)：1379-1391,13.DOI:10.16285/j.rsm.2024.0917
伊犁黄土水分入渗特征及其对湿陷变形的影响
Characteristics of water infiltration in Ili loess and its impact on collapse deformation
摘要
Abstract
Ili loess is susceptible to substantial collapsible deformation due to water infiltration,leading to various engineering failures.To investigate the characteristics of water infiltration and the mechanisms of collapsible deformation,a field immersion test was conducted in the collapsible loess region of Ili.The changes in water content,water diffusion form,infiltration water volume,and surface collapsible deformation during immersion were analyzed.Numerical simulations explored surface collapsible deformation characteristics under varying saturation infiltration ranges.The results showed that the average vertical diffusion rate in the experimental area was 0.38 m/d,while the average radial diffusion rate was 0.17 m/d.Over time,the water diffusion pattern transitioned from elliptical to conical,with a wet front angle of 41 ° and a saturated front angle of 20°.The quantitative analysis of the vertical and radial water diffusion rates and infiltration water volume of Ili loess over time was conducted.A mathematical relationship between infiltration range and cumulative infiltration volume per unit area was derived.The correction coefficient β0 for collapsible in the experimental area was determined to be 0.74,exceeding the recommended value of 0.5 in the specifications.The surface collapsible deformation correlates with water infiltration and can be divided into four stages:stable immersion,severe collapse,slow collapse,and consolidation settlement.As the saturation front angle increases,the surface collapsible deformation value maintains good consistency with the calculation results of the subsidence trough formula.The variation in the width of the subsidence trough aligns with the influence range of surface collapsibility,both following an exponential increase.关键词
伊犁黄土/现场浸水试验/数值计算/湿陷变形/入渗特征Key words
Ili loess/field immersion test/numerical calculation/collapsible deformation/infiltration characteristics分类
土木建筑引用本文复制引用
包卫星,田磊,吴谦,黄志明,张智勇..伊犁黄土水分入渗特征及其对湿陷变形的影响[J].岩土力学,2025,46(5):1379-1391,13.基金项目
国家自然科学基金项目(No.52308435) （No.52308435）
新疆维吾尔自治区重大科技专项项目(No.2020A03003-7) （No.2020A03003-7）
新疆维吾尔自治区自然科学基金(No.2023D01A91) （No.2023D01A91）
长安大学中央高校基本科研业务费专项资金资助(No.300102214917).This work was supported by the National Natural Science Foundation of China(52308435),the Science and Technology Major Project of Xinjiang Uygur Autonomous Region(2020A03003-7),the Natural Science Foundation of Xinjiang Uygur Autonomous Region(2023D01A91)and the Fundamental Research Funds for the Central Universities,Chang'an University(300102214917). （No.300102214917）
