长江科学院院报2024，Vol.41Issue(4)：119-123,5.DOI:10.11988/ckyyb.20221568
高围压状态下堆石料湿化变形特性
Wetting Deformation Characteristics of Rockfill under High Stress State
摘要
Abstract
Rockfill serves as the primary filling material in earth rock dams.Its wetting deformation characteristics have a significant influence on dam deformation during impoundment.Employing the single line method,we con-ducted extensive indoor triaxial wetting deformation tests under confining pressures of 0.5,1.0,2.0,and 3.0 MPa on two types of rockfill materials sourced from Lianghekou Hydropower Station.Results indicate a substantial in-crease in both axial and volumetric wetting deformations as stress levels and confining pressures escalate.This be-havior aligns with wetting deformation patterns observed under medium and low confining pressures.Notably,under high isotropic confining pressure,volumetric wetting strain correlates linearly with confining pressure in double log-arithmic coordinates,whereas axial wetting strain and confining pressure no longer meet a linear relationship.More-over,at high unsymmetrical confining pressures,the ratio of volumetric wetting strain to axial wetting strain typical-ly ranges from 0 to 2,exhibiting a nearly horizontal trend with increasing confining pressure.The six-parameter wet-ting model remains adept at accurately characterizing the axial and volumetric wetting deformation behaviors under varying stress levels and confining pressures.关键词
堆石料/湿化变形/单线法/高围压状态/应力水平Key words
rockfill/wetting deformation/single-line method/high confining pressure state/stress level分类
建筑与水利引用本文复制引用
左永振,张贵科,孙向军,潘家军,周跃峰..高围压状态下堆石料湿化变形特性[J].长江科学院院报,2024,41(4):119-123,5.基金项目
国家自然科学基金-西藏联合基金重点项目(U21A20158) （U21A20158）
国家自然科学基金-雅砻江联合基金重点项目(U1765203) （U1765203）
国家自然科学基金面上项目(51979010) （51979010）
