摘要
通过现场监测确定垃圾填埋场内的孔压,基于对监测结果的分析得到填埋场内渗滤液水位分布;取不同深度的垃圾土样进行三轴试验测定其抗剪强度参数,利用极限平衡方法定量分析孔隙水压力和孔隙气压力对填埋边坡稳定性的影响。研究结果表明:该填埋场内的渗滤液水位较高,由于中间覆盖层的存在,使填埋场内存在上层滞水;不同埋深垃圾土的抗剪强度不同,随着埋深增加,垃圾土的有效黏聚力减小,有效内摩擦角增加;渗滤液水位高低对填埋边坡安全系数影响很大,上层滞水对边坡稳定性影响较大,气压力对其稳定性影响不大。
Field monitoring is used to determine the pore pressure in a landfill;and the distribution of leachate level is obtained by analyzing the monitoring results. To determine the shear strength parameters of buried waste at different depths of the landfill,the triaxial test is conducted;and the influences of pore water pressure and poreair pressure on slope stability of the landfill are analyzed quantitatively by using limit equilibrium method. The research results show that the leachate level is high,and there is perched groundwater in the landfill because of the existence of intermediate cover. The triaxial tests demonstrate that the shear strengths for solid waste at different buried depths are different,and the effective cohesion of the buried waste decreases with buried depth,whereas the effective internal friction angle increases with buried depth. The leachate level can obviously influence the safety factor of landfill slope. The perched groundwater has a great influence on stability,whereas the pore air pressure has a minor impact on it.
出处
《岩石力学与工程学报》
EI
CAS
CSCD
北大核心
2010年第A02期3628-3632,共5页
Chinese Journal of Rock Mechanics and Engineering
基金
国家自然科学基金资助项目(50908140)
关键词
边坡工程
填埋场
孔压
上层滞水
抗剪强度
稳定性分析
slope engineering
landfill
pore pressure
perched groundwater
shear strength
stability analysis
