Hydraulic Performance Experiment For GCL In Landfill Liner

GCL (bentonite waterproof blanket) is the second compacted clay liner (CCL), geomembrane (HDPE, GM), after a new type of impermeable composite geotextile material.Compared with the compacted clay liner, GCL mainly in the thickness of the advantages of small size, light weight, simple construction, and has a higher shear strength and strong self-healing capabilities. compared with other geotechnical materials, flexible, interface friction, and can withstand differential settlement, aging reaction does not occur, easy transportation, installation and so on. Compared with other geotechnical materials, flexible, interface friction, and can withstand differential settlement, aging reaction does not occur, easy transportation, installation and so on. At present the role of scientists in the leachate performance of GCL under a lot of work done, but not very well studied, it is difficult for domestic landfill liner system designed to provide comprehensive and scientific theory. GCL and CCL for more impervious based on qualitative, the lack of quantitative analysis. These are of solid waste landfill must be concerned about and solve problems. Therefore, this article uses laboratory experiments, theoretical analysis and other methods, the impact on the GCL permeability factor, the leachate under the self-healing ability of GCL, GCL and CCL impervious conducted a detailed comparative study, also conducted a hydration Swelling test and the liquid and plastic limits, and thus the expansion of the GCL performance, liquid and plastic limit of the relationship between their permeability coefficients:(1)By reference and learn from the experience, the permeability of the GCL were tested to study the types of pollutants in leachate, the amount of pollutants, hydration order of overburden pressure (confining pressure) of the GCL hydraulic conductivity. The expansion properties of GCL bentonite, liquid and plastic limits were tested in order to study the relationship for expansion performance of GCL, liquid and plastic limit, and the detailed analysis of the mechanism.(2)The flexible wall permeameter test the defect state to the gas tap in the GCL, the solution under the action of permeability, and thus the self-healing ability of the GCL were studied, and a brief analysis of the factors that affect the GCL self-healing ability.(3)Using QY1-2 type of permeability of the clay permeability permeability test conducted to study the adsorption under different stress levels of different pollutants in the seepage properties of CCL, and from the permeability and the amount of contaminant transport in the two aspects of GCL and CCL The performance of the equivalent seepage evaluation.