岩土工程学报2025，Vol.47Issue(z1)：10-15,6.DOI:10.11779/CJGE2025S10045
考虑颗粒破碎的碎石料渗透特性试验研究
Experimental study on permeability characteristics of crushed stone considering particle breakage
木林隆 1王超 1王乐 2曹杰 3张沛云1
作者信息
- 1. 同济大学土木工程学院地下建筑与工程系,上海 200092||同济大学岩土及地下工程教育部重点实验室,上海 200092
- 2. 中铁第一勘察设计院集团有限公司,陕西 西安 710043
- 3. 机械工业勘察设计研究院,陕西 西安 710043
- 折叠
摘要
Abstract
The volumetric deformation and particle breakage of crushed stone soil under high stress will alter its permeability.To investigate the changes in the permeability of crushed stone materials before and after particle breakge under confined pressure,a large-scale permeameter with an independently controllable axial loading system is designed to conduct seepage tests on the crushed stone soil under pressures.The permeability characteristics of crushed stone soil under confined pressure are obtained,and the relationships are established among permeability characteristics,pore ratio,gradation and axial pressure.The results indicate that as the axial pressure increases,particle breakage intensifies,leading to an increase in the content of fine particles and a decrease in the porosity,resulting in a significant reduction in seepage velocity.When the crushed stone soil experiences seepage within a small range of hydraulic gradients,there is a generally linear relationship between hydraulic gradient and flow velocity.The stress state has a significant impact on the permeability characteristics of the crushed stone soil,with a notable decrease in the permeability as the axial pressure increases.关键词
碎石土/轴向加载/颗粒破碎/渗透特性Key words
crushed stone/axial loading/particle breakage/permeability characteristic分类
建筑与水利引用本文复制引用
木林隆,王超,王乐,曹杰,张沛云..考虑颗粒破碎的碎石料渗透特性试验研究[J].岩土工程学报,2025,47(z1):10-15,6.
