Test system for simulating all-weather influence of vegetation on water, gas, heat and force coupling migration of unsaturated soil covering layer or side slope

Abstract

The invention provides a test system for simulating all-weather influence of vegetation on water, gas, heat and force coupling migration of an unsaturated soil covering layer or a side slope. The test system comprises a model tank for accommodating a vegetation-containing landfill covering layer or side slope model, the model tank is divided into a part A and a part B: a landfill gas introduction device is arranged at the bottom of the part A of the model tank; the model groove A part is provided with a heating device; the side wall of the model groove A part is coated with a heat insulation material; the model groove B part is provided with a ventilation system; a temperature controller is externally connected; the model groove B part is provided with a weather system; the main body of the water, gas, heat and force coupling model of the indoor all-weather vegetation-containing soil covering layer or the side slope is the covering layer or the side slope; in the test process, the landfill gas introduction device simulates the landfill gas to enter the covering layer; according to the invention, mutual influence of moisture-landfill gas-heat energy-mechanics under various weather conditions can be simulated at the same time, and the problem of simulation of drought and rainfall circulation in a test is solved.

Description

Technical field: [0001] The invention relates to the technical field of environment, vegetation and soil research, in particular to a large-scale test system for simulating the influence of plants on unsaturated soil covering layer or slope water, air, heat and force coupling migration under all-weather conditions. Background technique: [0002] With the rapid development of the country's economy, people's living and consumption levels are gradually improving, and the corresponding waste generation is also increasing year by year. At present, most of domestic waste in our country is still disposed of in landfill. The covering layer of the landfill is like the skin of the landfill, which plays a very important role and should have two functions of waterproof and air-tight. [0003] In actual engineering, the leachate produced by rainfall and surface water infiltration pollutes groundwater and leads to deterioration of the living environment; the biodegradation process of gar...

AI Technical Summary

Problems solved by technology

At present, there is a lack of corresponding research on the impact of vegetation on the coupled migration of water, air, heat, and force in unsaturated soil covering layers or slopes under all-weather conditions, which is the key to comprehensively and systematically analyzing the waterproof and air-tight performance of covering layers.

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