华东交通大学学报2025，Vol.42Issue(1)：8-15,8.
地下水渗流作用下泥质粉砂岩颗粒迁移质量流失的试验研究
Experimental Study of Particle Migration Mass Loss in Muddy Siltstone Under Groundwater Seepage Effects
摘要
Abstract
The underlying weathered argillaceous siltstone of Nanchang Metro tunnel is eroded by groundwater seepage for a long time,which leads to the migration and loss of fine particles,destroys the rock mass structure and affects the safe operation of the tunnel.In order to study the influence mechanism of groundwater seepage on particle migration,the mass loss test of weathered argillaceous siltstone particle migration under groundwater seepage was carried out,the relationship between the Talbol power exponent n and the mass loss rate,porosity and compaction thickness of the sample was investigated.The results show that the mass loss rate of the samples under different compaction thickness increases first and then decreases with time.The proportion of fine parti-cles in the sample increases,and the variation range of porosity increases,the porosity of each group of samples changes rapidly in the first 10～20 min,and the mass loss is more obvious.The permeability of the sample is af-fected by both porosity and gradation.The relationship between permeability and porosity is a power exponential function,and the coefficient kr increases with the increase of n in a good logarithmic function,the coefficient λr increases linearly withn,and the correlation coefficients are all greater than 0.99.关键词
风化泥质粉砂岩/地下水渗流/颗粒迁移/质量流失Key words
weathered muddy siltstone/groundwater seepage/particle migration/mass loss分类
土木建筑引用本文复制引用
吴浪,石钰锋,王超..地下水渗流作用下泥质粉砂岩颗粒迁移质量流失的试验研究[J].华东交通大学学报,2025,42(1):8-15,8.基金项目
国家自然科学基金项目(42177162,52368053) （42177162,52368053）
