摘要
为满足排土场后续工程设计与稳定性评价,分别开展室内直剪试验及现场原位直剪试验,分析排土场散体物料的力学特性。同时,针对该排土场所在工程区富水性强的地质条件,基于饱和-非饱和渗流理论,采用GEO-STUDIO有限元软件对排土场进行降雨渗流分析。结果表明:在降雨强度145.1 mm/d、历时24 h下的边坡渗流场,孔隙水压力等值线在边坡上发生明显变化,水位线以上孔隙水压力明显增大,水位线上升,坡脚处的孔隙水压力大于坡中及坡顶;采用极限平衡法验证连续降雨1天、5天、10天三种工况下排土场稳定性,发现所有工况下的安全系数均大于1.20,计算结果满足规范对边坡工程安全系数的要求。
To meet the requirements of subsequent engineering design and stability evaluation for the waste dump,laboratory direct shear tests and in-situ direct shear tests are conducted to analyze the mechanical properties of bulk materials in the dump.Given the water-rich geological conditions of the project area where the dump is located,a rainfall infiltration analysis is carried out using GEO-STUDIO finite element software based on saturated-unsaturated seepage theory.The results show that under rainfall conditions(intensity:145.1 mm/d,duration:24 h),for the seepage field of the slope,the pore water pressure contour lines shift noticeably,pore water pressure above the water table increases substantially,the water table rises,and the pore water pressure at the toe of the slope exceeds that at the mid-slope and crest.The limit equilibrium method is used to evaluate the stability of the dump under three rainfall duration scenarios(1 day,5 days,and 10 days).The safety factors under all scenarios are greater than 1.20,meeting the requirements for slope engineering safety factors specified in the standards.
作者
刘国寅
杨寿全
丁军明
冯家宁
张涛
LIU Guoyin;YANG Shouquan;DING Junming;FENG Jianing;ZHANG Tao(Kunming Kunze Mining Technology Co.,Ltd.,Kunming 650032,China;Yunnan Simao Sanshui Copper Industry Co.,Ltd.,Pu'er 665000,China)
出处
《矿业工程》
2025年第5期45-50,共6页
Mining Engineering
关键词
排土场
直剪试验
降雨
稳定性
waste dump
direct shear test
rainfall
stability
