CN103604907A - Environmental evolution and impermeable failure analog simulation system for refuse landfill closure coverage system - Google Patents

Environmental evolution and impermeable failure analog simulation system for refuse landfill closure coverage system Download PDF

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CN103604907A
CN103604907A CN201310558945.0A CN201310558945A CN103604907A CN 103604907 A CN103604907 A CN 103604907A CN 201310558945 A CN201310558945 A CN 201310558945A CN 103604907 A CN103604907 A CN 103604907A
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model body
bearing groove
body bearing
rectangular model
stress
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CN103604907B (en
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万勇
薛强
赵立业
刘磊
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Wuhan Institute of Rock and Soil Mechanics of CAS
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Wuhan Institute of Rock and Soil Mechanics of CAS
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Abstract

The invention relates to an environmental evolution and impermeable failure analog simulation system for a refuse landfill closure coverage system and belongs to the technical field of environmental engineering. The analog simulation system consists of a man-made climate system, a coverage system failure test platform, a digital imaging system, a stress-temperature-moisture monitoring system, a flow and sediment monitoring system and an environment parameter control and acquisition analysis system. The simulation system can be used for realizing environmental evolution and impermeable failure analog simulation of the closure coverage system under external dry-wet alternation and freezing and thawing cycle and internal high-temperature and supernormal environment conditions of the refuse landfill, dynamically monitoring multiple parameters such as the vegetation root growth, crack extension, stress-temperature-moisture distribution and subsurface runoff sediment and infiltration rainwater amount inside the closure coverage system and comprehensively analyzing the multiple parameters through the environment parameter control and acquisition analysis system.

Description

The environmental lapse of a kind of refuse landfill sealing covering system and antiseepage inefficacy analog simulation system
Technical field
The present invention relates to the environmental lapse of a kind of refuse landfill sealing covering system and antiseepage inefficacy analog simulation system, belong to environmental geotechnical field.
Background technology
Garbage sanitary filling field seepage control system problems of ecological security is the field of national environmental protection " 12 " plan priority development! Especially the Failure Control problem of Closure of landfill site covering system is that current environment protection engineering field urgently needs one of Important Project difficult problem solving.China < < house refuse Sanitary Landfill Technology standard > > (CJJ17-2004) recommend adoption compacting clay or geosynthetics are made as Closure cover system, require the infiltration coefficient of antiseepage clay layer must be less than 1 * 10 -7 cm/s.Yet, China conventional garbage landfill yard overwhelming majority is Simple Landfill Site, in landfill yard operational process, during garbage loading embeading, do not carry out compaction in layers, and due to factors such as being subject to uneven settlement, rain erosion, dry wet freeze thawing circulation affect cause the destruction of refuse landfill sealing covering system and disabler problem more outstanding.Refuse landfill sealing covering system problem of Cracking is increasingly severe, its covering system cracking will become the direct channel of rainwater infiltration, increases percolate and leaks, and pollutes water and soil environment around, cause serious environmental geology disaster, caused showing great attention to of international environment Geotechnical Engineering circle.
Closure of landfill site covering system, as landfill yard forefront barrier, because it directly contacts with atmosphere, is subject to atmosphere drying and watering cycle effect obvious, is easy to cracking under atmosphere drying and watering cycle effect.In long-term rainfall period, the saturation degree of soil increases, and at long-term drying period, the water percentage of soil reduces, and in soil, suction increases simultaneously.If suction reaches certain ultimate value in soil, will there is desciccation crack, the sealing function of clay barrier layer will suffer damage.Vegetation root system suppresses clay cracking as a kind of special muscle material and the raising successful of intensity and be easy to Project Realization, as a kind of green screen, has been widely used in excavating during the protection of stacking edge slope and clay cracking destruction prevent and treat.China's landfill yard standard also requires that vegetable layer is set covering system is protected.But because the interaction mechanism of vegetation root system and clay seam is still not clear, root system of plant affects pros and cons relation and cannot quantitatively judge having the clay blanket soil property of characteristic antiseepage task, therefore type and the tectal thickness of root soil in landfill yard field vegetation is strictly controlled, and vegetation is brought into play non-effect and also only limits to circumstance and scenery and improve aspect.The bind hysteresis quality of covering system root soil interaction theoretical research of landfill yard, has seriously restricted the application development of Closure of landfill site covering system vegetative protection.In recent years, after Closure of landfill site, formula ecological construction in park has become the focus that the sustainable development of landfill yard place is paid close attention to, a large amount of long root type plants, as arbor, shrub etc., be applied to gradually in the middle of the ecological construction after Closure of landfill site, the expansion of vegetation root system coverage has further aggravated to carry out vegetation root system affects the urgency of rule research on landfill yard covering system cracking property under drying and watering cycle effect.
Therefore, research and develop the environmental lapse of a set of refuse landfill sealing covering system and antiseepage inefficacy analog simulation system, realization is under Different climate condition, the analog simulation of refuse landfill sealing covering system environmental lapse and the dynamic monitoring of antiseepage failure procedure, for the design of refuse landfill sealing covering system provides experiment parameter.
Summary of the invention
Problem for above-mentioned existence, the object of the present invention is to provide the environmental lapse of a kind of refuse landfill sealing covering system and antiseepage inefficacy analog simulation system, this system can realize under Different climate condition, the environmental lapse of refuse landfill sealing covering system and antiseepage inefficacy analog simulation.
The environmental lapse of a kind of refuse landfill sealing covering system and antiseepage inefficacy analog simulation system, described simulation system is by artificial climate system, covering system failure test platform, digital imaging system, stress-temperature-moisture monitoring system, water flow mud-sand monitoring system, environment parameter control and acquisition analysis system form, covering system failure test platform, digital imaging system, stress-temperature-moisture monitoring system is separately positioned in artificial climate system inner bag, covering system failure test platform is by rectangular model body bearing groove, rainwater-collecting groove, heating plate, I-shaped bracket, hydraulically extensible bar, turning axle, electronic scale, waterproof and heat-insulating cover forms, electronic scale is positioned on the carrying platform of artificial climate system inner bag bottom, waterproof and heat-insulating cover covers on electronic scale, I-shaped bracket is positioned at waterproof and heat-insulating cover top, I-shaped bracket four limbs penetrate waterproof and heat-insulating cover and are placed in electronic scale, rectangular model body bearing groove is positioned at I-shaped bracket top, turning axle is fixed between two legs of I-shaped bracket one end, rectangular model body bearing groove one end and turning axle are hinged, hydraulically extensible bar piston termination is fixed on rectangular model body bearing groove bottom, the base of hydraulically extensible bar is fixed on the crossbeam at I-shaped bracket middle part, heating plate is positioned at rectangular model body bearing groove bottom, rainwater-collecting groove is arranged on heating plate top, rainwater-collecting groove is communicated with water flow mud-sand monitoring system by the first pipeline, water flow mud-sand monitoring system is arranged on the outside of artificial climate system, runoff and sediment feeder is fixedly mounted on rectangular model body bearing groove lateral wall, and be positioned at the upper end of rectangular model body bearing groove, runoff and sediment feeder and rectangular model body bearing groove junction have collects mouth, runoff and sediment feeder is communicated with water flow mud-sand monitoring system by second pipe, the vertical camera of digital imaging system in artificial climate system forms with the horizontal camera being fixed on rectangular model body bearing groove sidewall, vertical camera is positioned at directly over rectangular model body bearing groove, horizontal camera is positioned at rectangular model body bearing groove one side central authorities, stress-temperature-moisture monitoring system comprises that two groups with upper stress-moisture-sets of temperature sensors, stress-moisture-temperature-matric suction sensor group is positioned at rectangular model body bearing groove.
With horizontal camera over against rectangular model body bearing groove wall adopt glass material.
How artificial climate system, horizontal camera, stress-moisture-temperature-matric suction sensor group, heating plate, hydraulically extensible bar, electronic scale, water flow mud-sand monitoring system be all by being connected with acquisition analysis system with environment parameter control by converter.
Owing to having adopted above technical scheme, a kind of refuse landfill sealing covering system of the present invention environmental lapse and antiseepage inefficacy analog simulation system, by test design requirement, the Closure cover system model body of needs simulation is placed in to rectangular model body bearing groove, the flexible of hydraulically extensible bar by rectangular model body bearing groove bottom outside can make rectangular model body bearing groove one end rotate around the turning axle that is fixed on I-shaped bracket one end, the gradient with this capable of regulating Closure cover system, the temperature of heating plate that is positioned at rectangular model body bearing groove bottom inside can be from normal temperature to 70 degree Celsius electrodeless variation, can be opposite to thus in rectangular model body bearing groove, heat the Closure cover system bottom of heating plate top, the effect of simulation refuse landfill internal high temperature to Closure cover system, whole covering system failure test platform is positioned at enclosed artificial climate system, artificial climate system can be simulated alternation of wetting and drying, the effects of Different climate environment to Closure cover system such as freeze thawing circulation, Closure cover system top layer runoff and silt are collected by runoff and sediment feeder, and carry out dynamic monitoring by the first pipeline flow-direction water flow mud-sand monitoring system, the rainwater that penetrates Closure cover system is collected via the rainwater-collecting groove of Closure cover system bottom, and by second pipe, flow to water flow mud-sand monitoring system and carry out dynamic monitoring, stress in Closure cover system model body, moisture, the distribution of temperature can be by being distributed on the stress-moisture-sets of temperature sensors dynamic monitoring in rectangular model body bearing groove, Closure cover system model surface vegetation blade can be by vertical camera dynamic monitoring with crack morphological parameters collection, the extension morphological parameters in the inner vegetation root system of Closure cover system model body and crack can be by horizontal camera dynamic monitoring, in Closure cover system model body, total moisture evaporation capacity can pass through electronic scale dynamic monitoring, rainfall intensity in artificial climate system, intensity of illumination, temperature, humidity, CO 2with O 2concentration all can by environment parameter control and acquisition analysis system by testing requirements default with regulation and control, simultaneously stress, moisture, temperature, under ooze amount of rainfall, run-off, quantity of sand and mud, vegetation blade face parameter, vegetation root system distribution parameter, crack morphological parameters etc. and all can carry out dynamic acquisition and analysis by environment parameter control and acquisition analysis system.
Accompanying drawing explanation
Accompanying drawing 1 is structural representation of the present invention.
Embodiment
Below in conjunction with accompanying drawing, the present invention is explained in further detail: see accompanying drawing.
The environmental lapse of a kind of refuse landfill sealing covering system and antiseepage inefficacy analog simulation system, shown in simulation system by artificial climate system 1, covering system failure test platform, digital imaging system, stress-temperature-moisture monitoring system, water flow mud-sand monitoring system 10, environment parameter control and acquisition analysis system 16 form, it is CN202949783 U that artificial climate system 1 adopts China Patent Publication No., denomination of invention is " a kind of is the artificial climate system of model test for soil-vegetation-atmosphere Continuum ", this artificial climate system can be by rotary rainfall illumination integrated unit 20 simulated rainfalls and illumination, by the airflow circulating system 21 simulation climatic environment such as blow, and realize rainfall intensity, intensity of illumination, temperature, humidity, CO 2with O 2the dynamic regulation of concentration, covering system failure test platform, digital imaging system, stress-temperature-moisture monitoring system is separately positioned in artificial climate system 1, covering system failure test platform is by rectangular model body bearing groove 5, rainwater-collecting groove 6, heating plate 13, I-shaped bracket 18, hydraulically extensible bar 14, turning axle 11, electronic scale 12, waterproof and heat-insulating cover 15 forms, electronic scale 12 is positioned on the carrying platform 19 of artificial climate system 1 inner bag bottom, waterproof and heat-insulating cover 15 covers on electronic scale 12, I-shaped bracket 18 is positioned at waterproof and heat-insulating cover 15 tops, I-shaped bracket 18 four limbs penetrate waterproof and heat-insulating cover 15 and are placed in electronic scale 12, rectangular model body bearing groove 5 is positioned at I-shaped bracket 18 tops, turning axle 11 is fixed between two legs of I-shaped bracket 18 one end, rectangular model body bearing groove 5 one end and turning axle 11 are hinged, hydraulically extensible bar 14 piston terminations are fixed on rectangular model body bearing groove 5 bottoms, the base of hydraulically extensible bar 14 is fixed on the crossbeam at I-shaped bracket 18 middle parts, heating plate 13 is positioned at rectangular model body bearing groove 5 bottoms, rainwater-collecting groove 6 is arranged on heating plate 13 tops, rainwater-collecting groove 6 is communicated with water flow mud-sand monitoring system 10 by the first pipeline 9, water flow mud-sand monitoring system 10 is arranged on the outside of artificial climate system 1, it is CN201429556 that water flow mud-sand monitoring system 10 adopts China Patent Publication No., denomination of invention is " radial flow sediment content dynamic monitor ", this device can carry out dynamic monitoring to the silt carrying flow amount of access to plant and the content containing husky in husky water, runoff and sediment feeder 7 is fixedly mounted on rectangular model body bearing groove 5 lateral walls, and be positioned at the upper end of rectangular model body bearing groove 5, runoff and sediment feeder 7 has and collects mouth with rectangular model body bearing groove 5 junctions, runoff and sediment feeder 7 is communicated with water flow mud-sand monitoring system 10 by second pipe 8, the vertical camera 2 of digital imaging system in artificial climate system 1 forms with the horizontal camera 3 being fixed on rectangular model body bearing groove 5 lateral walls, vertical camera 2 is positioned at directly over rectangular model body bearing groove 5, horizontal camera 3 is positioned at rectangular model body bearing groove 5 one side central authorities, stress-temperature-moisture monitoring system comprises that two groups with upper stress-moisture-sets of temperature sensors 4, every group of stress-moisture-sets of temperature sensors 4 is by a strain gauge, a moisture transducer and a temperature sensor form, stress-moisture-temperature-matric suction sensor group 4 is positioned at rectangular model body bearing groove 5.
Rectangular model body bearing groove 5 adopts low heat conductivity material, and adopts glass material with horizontal camera right opposite.
Rainwater-collecting groove 6 adopts high thermal conductivity material, and solid fine sand, the water guide layer in simulation refuse landfill sealing covering system.
Artificial climate system 1, horizontal camera 3, stress-moisture-sets of temperature sensors 4, heating plate 13, hydraulically extensible bar 14, electronic scale 12, water flow mud-sand monitoring system 10 are all connected with acquisition analysis system 16 with environment parameter control by converter 17 by many.
The principle of work of pilot system of the present invention
Before test, according to test objective and requirement, each composition material of Closure cover system is inserted in rectangular model body bearing groove 5, then and by stress-moisture-sets of temperature sensors at assigned address, penetrate rectangular model body bearing groove 5 and insert in Closure cover system, by stretching of hydraulically extensible bar 14, adjust the gradient of covering system, the climate parameter that will simulate (different hourly precipitation intensity, wind speed, intensity of illumination etc.) with refuse landfill internal environment parameter (temperature) input environment parameter control with acquisition analysis system in, during test, by environment parameter control and acquisition analysis system, issued the dynamic change environment of the appointment simulation Closure cover system top and bottom of artificial climate system 1 and heating plate 13, by runoff and sediment feeder 7 and rainwater-collecting groove 6, collect respectively the runoff of Closure cover system surfaces, under silt and bottom, ooze rainwater, by water flow mud-sand monitoring system 10 kinetic measurement runoffs, under silt and bottom, ooze amount of rainfall, by being distributed on the stress-moisture-sets of temperature sensors 4 dynamic monitoring Closure cover internal system stress in Closure cover system model body, moisture, the distribution of temperature, extension morphological parameters by vertical camera 2 with horizontal camera 3 dynamic monitoring Closure cover system surfaces vegetation blades and crack morphological parameters and Closure cover internal system vegetation root system and crack, by water flow mud-sand monitoring system 10, the parameter that stress-moisture-temperature-matric suction sensor group 4 and numerical value imaging system gather, all by multichannel converter 17, import environment parameter control into and acquisition analysis system 16 carries out dynamic acquisition and analysis.

Claims (3)

1. refuse landfill sealing covering system environmental lapse and antiseepage inefficacy analog simulation system, it is characterized in that: described simulation system is by artificial climate system (1), covering system failure test platform, digital imaging system, stress-temperature-moisture monitoring system, water flow mud-sand monitoring system (10), environment parameter control and acquisition analysis system (16) form, covering system failure test platform, digital imaging system, stress-temperature-moisture monitoring system is separately positioned in artificial climate system (1) inner bag, covering system failure test platform is by rectangular model body bearing groove (5), rainwater-collecting groove (6), heating plate (13), I-shaped bracket (18), hydraulically extensible bar (14), turning axle (11), electronic scale (12), waterproof and heat-insulating cover (15) forms, electronic scale (12) is positioned on the carrying platform (19) of artificial climate system (1) inner bag bottom, waterproof and heat-insulating cover (15) covers on electronic scale (12), I-shaped bracket (18) is positioned at waterproof and heat-insulating cover (15) top, I-shaped bracket (18) four limbs penetrate waterproof and heat-insulating cover (15) and are placed in electronic scale (12), rectangular model body bearing groove (5) is positioned at I-shaped bracket (18) top, turning axle (11) is fixed between two legs of I-shaped bracket (18) one end, rectangular model body bearing groove (5) one end and turning axle (11) are hinged, hydraulically extensible bar (14) piston termination is fixed on rectangular model body bearing groove (5) bottom, the base of hydraulically extensible bar (14) is fixed on the crossbeam at I-shaped bracket (18) middle part, heating plate (13) is positioned at rectangular model body bearing groove (5) bottom, rainwater-collecting groove (6) is arranged on heating plate (13) top, rainwater-collecting groove (6) is communicated with water flow mud-sand monitoring system (10) by the first pipeline (9), water flow mud-sand monitoring system (10) is arranged on the outside of artificial climate system (1), runoff and sediment feeder (7) is fixedly mounted on rectangular model body bearing groove (5) lateral wall, and be positioned at the upper end of rectangular model body bearing groove (5), runoff and sediment feeder (7) has and collects mouth with rectangular model body bearing groove (5) junction, runoff and sediment feeder (7) is communicated with water flow mud-sand monitoring system (10) by second pipe (8), the vertical camera (2) of digital imaging system in artificial climate system (1) forms with the horizontal camera (3) being fixed on rectangular model body bearing groove (5) sidewall, vertical camera (2) is positioned at directly over rectangular model body bearing groove (5), horizontal camera (3) is positioned at rectangular model body bearing groove (5) one side central authorities, stress-temperature-moisture monitoring system comprises that two groups with upper stress-moisture-sets of temperature sensors (4), stress-moisture-temperature-matric suction sensor group (4) is positioned at rectangular model body bearing groove (5).
2. a kind of refuse landfill sealing covering system according to claim 1 environmental lapse and antiseepage inefficacy analog simulation system, is characterized in that: with horizontal camera (3) over against rectangular model body bearing groove (5) wall adopt glass material.
3. a kind of refuse landfill sealing covering system according to claim 1 environmental lapse and antiseepage inefficacy analog simulation system, is characterized in that: artificial climate system (1), horizontal camera (3), stress-moisture-temperature-matric suction sensor group (4), heating plate (13), hydraulically extensible bar (14), electronic scale (12), water flow mud-sand monitoring system (10) are all connected with acquisition analysis system (16) with environment parameter control by converter (17) by many.
CN201310558945.0A 2013-11-12 2013-11-12 Environmental evolution and impermeable failure analog simulation system for refuse landfill closure coverage system Active CN103604907B (en)

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CN104049073A (en) * 2014-06-18 2014-09-17 中国科学院武汉岩土力学研究所 Compacted clay impervious structure cracking failure simulation test system under environmental gradient action
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CN110618006A (en) * 2019-10-15 2019-12-27 上海大学 Water-force characteristic test sample preparation and harmful gas reduction efficiency test device
CN111175474A (en) * 2020-02-20 2020-05-19 中南大学 Refuse landfill closing covering layer model test system considering multi-field coupling effect
CN111175474B (en) * 2020-02-20 2021-04-13 中南大学 Refuse landfill closing covering layer model test system considering multi-field coupling effect
CN112326352A (en) * 2020-11-03 2021-02-05 南开大学 Automatic sampling device of ground rainwater runoff

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