垃圾填埋场衬垫系统穿刺性能评价

垃圾中含有铁、玻璃和陶瓷等尖锐物，在荷载作用下极有可能使衬垫系统发生破坏，导致渗滤液流入地下污染周边环境，如何正确评价衬垫系统的穿刺性能很重要。考虑材料的抗拉强度、厚度以及穿刺棒的直径提出了衬垫系统穿刺力的评价公式，并与试验结果进行了比较。结果表明，单层土工膜的抗穿刺力试验结果与评价值比较吻合，但由土工膜与无纺布组成的衬垫系统抗穿刺力的试验值与评价结果有一定偏差；土工膜与无纺布一起使用能大幅度提高衬垫系统的抗穿刺能力，因此土工膜上应铺设无纺布有利于保护衬垫系统；土工膜的抗拉强度越大，抗穿刺能力越强；基础的存在能在一定程度上提高衬垫系统的抗穿刺性能。所得结果对垃圾填埋场衬垫系统的设计具有一定的指导意义

Evaluation of puncture performance of liner system for solid waste landfills

Because of the containing iron,glass and ceramics in solid waste,the geomembrane may be easily damaged and results in infiltrating into the surrounding ground and water;so it is very important how to evaluate the puncture performance of liner system.Taking into account the tensile strength,the thickness of geomembrane and the diameter of puncture probe,an evaluation formula of puncture resistance is presented based on the thin-walled structural mechanics theory;and the calculated values are compared with th...