中南大学学报（自然科学版）2026，Vol.57Issue(2)：641-653,13.DOI:10.11817/j.issn.1672-7207.2026.02.013
基于纤维随机理论的隧道土工布渗透系数阻力理论模型
Resistance model of tunnel geotextile permeability coefficient based on random fiber theory
摘要
Abstract
Aiming at the problem that the existing geotextile permeability coefficient models are difficult to accurately reflect the seeping-stress coupling conditions in actual engineering,a new permeability coefficient resistance model based on fiber random theory was proposed in the paper.The random distribution characteristics of fibers were characterized by introducing the normal distribution weight function,and the compressive stress effect was transformed into the adjustment parameters of the spatial orientation of fibers.Based on the analysis of performance parameters of geotextiles,the theoretical calculation formula of the total fiber length was established,and the theoretical framework of new permeability coefficient resistance model was derived in combination with the principles of fluid mechanics.To verify the reliability of model,15 sets of pressurized transverse permeation test data and 16 sets of pressurized vertical permeation test data for parameter calibration were used.The results show that the fiber random distribution parameter has a negative exponential relationship with the solid volume fraction(regression coefficient R2=0.95),and the compressive stress parameter has a significant linear positive correlation with the load value(regression coefficient R2=0.92).In addition,both the transverse and vertical permeability coefficients show a changing pattern of rapid attenuation first and then stabilization with the increase of external loads and the volume fraction of solids.The maximum deviation between the predicted results of the new model and the measured values does not exceed 0.16 cm/s,and thus the reliability and accuracy of the model are verified.The theoretical basis and technical support for the design of tunnel waterproofing and drainage systems can be provided.关键词
隧道工程/土工布/渗透系数/阻力理论模型/纤维随机理论Key words
tunnel engineering/geotextile/permeability coefficient/resistance model/fiber random theory分类
交通工程引用本文复制引用
康磊,龚琛杰,王海林,杨飞..基于纤维随机理论的隧道土工布渗透系数阻力理论模型[J].中南大学学报（自然科学版）,2026,57(2):641-653,13.基金项目
湖南省教育厅优秀青年基金资助项目(24B0026) （24B0026）
公路隧道抗裂防水"一体化"新技术研究及应用项目(HY2307ZX005)(Projects(24B0026)supported by the Outstanding Youth Project of Education Department of Hunan Province （HY2307ZX005）
Project(HY2307ZX005)supported by the Research and Application Project of Integrated New Technology for Anti-cracking and Waterproofing of Highway Tunnels) （HY2307ZX005）
