岩土力学2025，Vol.46Issue(9)：2711-2720,2737,11.DOI:10.16285/j.rsm.2025.0435
考虑拉伸的土工袋体织物渗流特性试验及预测模型
Experimental study and predictive model for seepage characteristics of geotextiles for soilbags considering tensile deformation
摘要
Abstract
To investigate the evolution of permeability characteristics of geotextile materials in woven soilbags under compressive deformation in hydraulic protection engineering,a self-developed vertical permeability device and image analysis were utilized to study pore structure and seepage behavior under 0%-10%uniaxial tensile strain.The results demonstrated that tensile strain has a significant impact on the pore distribution of soilbag geotextiles.Porosity exhibited a weak exponential increase,while specific surface area showed a weak logarithmic increase with tensile strain.These relationships were quantified using a woven geotextile single-pore model.The hydraulic gradient-velocity relationship during seepage conformed to the Forchheimer equation.The critical Reynolds number exhibited non-monotonic variation,decreasing initially and then increasing with tensile strain.Inter-fiber spacing significantly influences flow regime transitions under low tensile strain.Based on the flow regime classification,the permeability coefficient corresponding to the Darcy flow regime was extracted.A predictive model for the permeability coefficient under tensile deformation was developed using porosity and specific surface area as predictors.The model's predictions showed good agreement with experimental measurements.The study elucidates the underlying mechanism by which tensile strain modulates the permeability of soilbag geotextiles through changes in porosity and specific surface area.关键词
土工袋/拉伸作用/形态学参数/临界雷诺数/渗透系数Key words
soilbag/tensile loading/morphological parameters/critical Reynolds number/permeability coefficient分类
建筑与水利引用本文复制引用
曹瑞栋,刘斯宏,田金博,鲁洋,张勇敢,李帆..考虑拉伸的土工袋体织物渗流特性试验及预测模型[J].岩土力学,2025,46(9):2711-2720,2737,11.基金项目
国家重点研发计划项目(No.2024YFC3210602,No.2024YFC3210603) （No.2024YFC3210602,No.2024YFC3210603）
国家自然科学基金项目(No.52479099,No.52109123).This work was supported by the National Key R&D Program of China(2024YFC3210602,2024YFC3210603)and the National Natural Science Foundation of China(52479099,52109123). （No.52479099,No.52109123）
