Carrubba Paolo
Department of Civil, Environmental and Architectural Engineering, University of Padua, 35131 Padua, Italy.
Polymers (Basel). 2024 Sep 5;16(17):2519. doi: 10.3390/polym16172519.
In landfill cover, geosynthetic packages are often used to fulfil different and simultaneous functions: drainage, waterproofing, separation, reinforcement, and soil protection. In this regard, various types of geosynthetics are combined in succession to allow for water and biogas drainage and to waterproof, reinforce, and provide protection from erosion over the useful lifetime, ranging over many decades if we consider the long phases of disposal, closure, and quiescence of the landfill itself. The creation of the composite cover barrier requires the evaluation of various interfaces' frictional strength under low contact stresses, both in static and seismic cases. The main purpose of this study is to summarize the results of past laboratory tests carried out on different geosynthetic-geosynthetic and geosynthetic-soil-geosynthetic interfaces using experimental instrumentation developed at the geotechnical laboratory of the University of Padua, which allows for the characterization of the interface geosynthetic friction at low contact stresses. The main aspects highlighted are the kinematic mode of failure, the wearing of the contact surfaces, the presence or absence of interstitial fluid, and, finally, the density level of the granular soil in contact with the geosynthetics.
在垃圾填埋场覆盖层中，土工合成材料包通常用于同时实现不同功能：排水、防水、隔离、加固和土壤保护。在这方面，各种类型的土工合成材料依次组合，以实现水和沼气的排放，并在长达数十年的使用寿命（如果考虑垃圾填埋场本身漫长的处置、封闭和静止阶段）内进行防水、加固和防止侵蚀。复合覆盖屏障的构建需要评估在低接触应力下各种界面在静态和地震情况下的摩擦强度。本研究的主要目的是总结过去在帕多瓦大学岩土实验室开发的实验仪器上，对不同土工合成材料-土工合成材料和土工合成材料-土壤-土工合成材料界面进行的实验室测试结果，该仪器能够表征低接触应力下界面土工合成材料的摩擦力。突出的主要方面包括破坏的运动模式、接触面的磨损、间隙流体的存在与否，以及最后与土工合成材料接触的粒状土的密度水平。
