矿石废料对垃圾筛分土抗剪特性的改良研究  

Improvement of Ore Waste on Filtered Landfill Soil Shearing Properties

作　　者：陆晓宇[1] 张洪江[1] 张成梁 孙龙[1] 

机构地区：[1]北京林业大学水土保持学院,北京100083 [2]轻工业环境保护研究所,北京100089

出　　处：《水土保持学报》2013年第1期82-85,共4页Journal of Soil and Water Conservation

基　　金：国家自然科学基金项目(41271300);北京市科学技术研究院科技创新工程项目(2011A-4-Z)

摘　　要：出于改良矿区坡面稳定性,处理垃圾筛分土、矿石废料等,进而实现缓解城市和环境压力的目的,对不同配比的矿石废料与垃圾筛分土混合物的稳定性进行研究。使用自制直剪仪,对不同体积比例的混合物进行抗剪试验,并模拟降雨,研究雨强对混合体稳定性的影响。结果表明:矿石废料占混合土体积比在20%～60%区间内时混合体稳定性最强;降雨能通过增加剪切面的垂直应力及改变剪切面含水率来降低剪切面的剪应力,从而造成坡面稳定性的下降;50%左右的矿石废料体积比具有最佳的抗剪效果,区间下限应高于30%,上限以植被恢复的存活率为参考依据。To improve slope stability in mineral areas, handling wastes like filtered landfill soil and slag, easing urban and environmental pressure, the research was done to determine soil stability of slag and garbage mixture in different ratios. Homemade direct shear apparatus was used to find an optimum mixture of different volume ratio in shear test, and the most desirous rainfall intensity with precipitation simulation. The results show that： When the optimum ratio of slag lies in the range of 20%-60%, the mixture stability is the strongest; precipitation can increase vertical stress, and change the moisture of shear surface to reduce the shear stress, and cause the slope stability to decline; about 50% is the optimum slag volume ratio for the best shear effect, the ratio of slag in the mixture should be higher than 30%, and the upper limit should be in accordance with the survival rate of vegetation restoration.

关 键 词：垃圾筛分土 剪应力 降雨 

分 类 号：S152.9[农业科学—土壤学] S157.1[农业科学—农业基础科学]