CN103604907B - 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 PDFInfo
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- CN103604907B CN103604907B CN201310558945.0A CN201310558945A CN103604907B CN 103604907 B CN103604907 B CN 103604907B CN 201310558945 A CN201310558945 A CN 201310558945A CN 103604907 B CN103604907 B CN 103604907B
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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
Technical field
The present invention relates to the environmental lapse of a kind of refuse landfill sealing covering system and impermeable failure 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 conservation project field urgently needs one of Important Project difficult problem solved.China " house refuse Sanitary Landfill Technology specification " (CJJ17-2004) recommends to adopt clay compaction or geosynthetics to make as Closure cover system, namely requires that the infiltration coefficient of antiseepage clay layer must be less than 1 × 10
-7 cm/s.But, China conventional garbage landfill yard overwhelming majority is Simple Landfill Site, in landfill yard operational process, do not carry out compaction in layers during garbage loading embeading, and due to affect by factors such as uneven settlement, rain erosion, dry wet Frozen-thawed cycled 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, increase percolate and leak, and pollute soil and water resources around, cause serious environmental geological Hazard, cause showing great attention to of international environment Geotechnical Engineering circle.
Closure of landfill site covering system is as landfill yard forefront barrier, because it is direct and atmosphere, obvious by air drying and watering cycle effect, is easy to cracking under air drying and watering cycle effect.At long-term heavy, the saturation degree of soil increases, and at long-term drying period, soil's water content reduces, and in soil, suction increases simultaneously.If suction reaches certain ultimate value in soil, will occur desciccation crack, the sealing function of clay barrier layer will suffer damage.Vegetation root system as a kind of special muscle material clay cracking suppressed and intensity raising successful and be easy to Project Realization, be widely used in excavating in the protection of stacking edge slope and the control of clay cracking destruction as a kind of green screen.China's landfill yard specification also requires that arranging vegetable layer protects covering system.But because the interaction mechanism of vegetation root system and clay seam is still not clear, root system of plant affects proscons analysis to the clay blanket soil property with characteristic antiseepage task cannot rational judgment, therefore be strictly controlled in the type of landfill yard field vegetation and the tectal thickness of root soil, vegetation plays non-effect and is also only limitted to circumstance and scenery improvement aspect.Landfill yard binds the hysteresis quality of covering system root soil interaction theoretical research, seriously constrains 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 plant, as arbor, shrub etc., be applied in the middle of the ecological construction after Closure of landfill site gradually, the expansion of vegetation root system coverage exacerbates further carries out the urgency of vegetation root system to the cracking property affecting laws research under drying and watering cycle effect of landfill yard covering system.
Therefore, research and develop the environmental lapse of a set of refuse landfill sealing covering system and impermeable failure analog simulation system, realize under Different climate condition, the analog simulation of refuse landfill sealing covering system environmental lapse and the dynamic monitoring of impermeable failure process, for the design of refuse landfill sealing covering system provides experiment parameter.
Summary of the invention
For above-mentioned Problems existing, the object of the present invention is to provide the environmental lapse of a kind of refuse landfill sealing covering system and impermeable failure analog simulation system, under this system can realize Different climate condition, the environmental lapse of refuse landfill sealing covering system and impermeable failure analog simulation.
A kind of refuse landfill sealing covering system environmental lapse and impermeable failure 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 is formed, electronic scale is positioned on the carrying platform bottom artificial climate system inner bag, waterproof and heat-insulating cover covers on electronic scale, I-shaped bracket is positioned at above waterproof and heat-insulating cover, 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 above I-shaped bracket, turning axle is fixed between two legs of I-shaped bracket one end, rectangular model body bearing groove one end and turning axle hinged, hydraulically extensible bar piston termination is fixed on bottom rectangular model body bearing groove, the base of hydraulically extensible bar is fixed on the crossbeam in the middle part of I-shaped bracket, heating plate is positioned at bottom rectangular model body bearing groove, rainwater-collecting groove is arranged on above heating plate, 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 collection mouth, runoff and sediment feeder is communicated with water flow mud-sand monitoring system by second pipe, digital imaging system is made up of the vertical camera in artificial climate system and the horizontal camera be 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 flanking central, stress-temperature-moisture monitoring system comprises stress-moisture-sets of temperature sensors more than two, stress-moisture-temperature-matric suction sensor group is positioned at rectangular model body bearing groove.
The rectangular model body bearing groove wall just right with horizontal camera adopts 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 have employed above technical scheme, a kind of refuse landfill sealing covering system of the present invention environmental lapse and impermeable failure analog simulation system, by test design requirement, rectangular model body bearing groove is placed in by needing the Closure cover system model body of simulation, rotated around the turning axle being fixed on I-shaped bracket one end by flexible rectangular model body bearing groove one end that can make of the hydraulically extensible bar of rectangular model body bearing groove bottom outside, with the gradient of this adjustable Closure cover system, the temperature of heating plate being positioned at rectangular model body bearing groove bottom inside can from normal temperature to 70 degree Celsius electrodeless change, can be opposite in rectangular model body bearing groove thus, Closure cover system bottom above heating plate heats, simulation refuse landfill internal high temperature is to the effect of Closure cover system, whole covering system failure test platform is positioned at enclosed artificial climate system, artificial climate system can simulate alternation of wetting and drying, the Different climate environment such as Frozen-thawed cycled are to the effect of Closure cover system, 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 penetrating Closure cover system is collected via the rainwater-collecting groove of Closure cover system bottom, and flow to water flow mud-sand monitoring system by second pipe and carry out dynamic monitoring, stress in Closure cover system model body, moisture, the distribution of temperature is 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 and crack morphological parameters gather by vertical camera dynamic monitoring, the extension morphological parameters in the inner vegetation root system of Closure cover system model body and crack is by horizontal camera dynamic monitoring, in Closure cover system model body, total moisture evaporation capacity is by electronic scale dynamic monitoring, rainfall intensity in artificial climate system, intensity of illumination, temperature, humidity, CO
2with O
2concentration is all preset and regulation and control by testing requirements by environment parameter control and acquisition analysis system, 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 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.
A kind of refuse landfill sealing covering system environmental lapse and impermeable failure analog simulation system, shown 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, artificial climate system 1 adopts China Patent Publication No. to be CN202949783 U, denomination of invention is " a kind of artificial climate system for soil-vegetation-atmosphere Continuum system model test ", this artificial climate system is by rotary rainfall illumination integrated unit 20 simulated rainfall and illumination, climatic environments such as blowing is simulated by airflow circulating system 21, 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 is formed, electronic scale 12 is positioned on the carrying platform 19 bottom artificial climate system 1 inner bag, waterproof and heat-insulating cover 15 covers on electronic scale 12, I-shaped bracket 18 is positioned at above waterproof and heat-insulating cover 15, 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 above I-shaped bracket 18, 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 hinged, hydraulically extensible bar 14 piston termination is fixed on bottom rectangular model body bearing groove 5, the base of hydraulically extensible bar 14 is fixed on the crossbeam in the middle part of I-shaped bracket 18, heating plate 13 is positioned at bottom rectangular model body bearing groove 5, rainwater-collecting groove 6 is arranged on above heating plate 13, 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, water flow mud-sand monitoring system 10 adopts China Patent Publication No. to be CN201429556, denomination of invention is " radial flow sediment content dynamic monitor ", this device can carry out dynamic monitoring to content husky in the arsenicbearing gold ores flow of access to plant and arsenicbearing gold ores, 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 and rectangular model body bearing groove 5 junction have collection mouth, runoff and sediment feeder 7 is communicated with water flow mud-sand monitoring system 10 by second pipe 8, digital imaging system is made up of with the horizontal camera 3 be fixed on rectangular model body bearing groove 5 lateral wall the vertical camera 2 in artificial climate system 1, 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 flanking central, stress-temperature-moisture monitoring system comprises stress-moisture-sets of temperature sensors 4 more than two, often organize stress-moisture-sets of temperature sensors 4 by a strain gauge, a moisture transducer and a temperature sensor composition, 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 thermal 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.
How 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 be all by being connected with acquisition analysis system 16 with environment parameter control by converter 17.
The principle of work of pilot system of the present invention
Before test, according to test objective and requirement, each for Closure cover system composition material is inserted in rectangular model body bearing groove 5, and stress-moisture-sets of temperature sensors is penetrated rectangular model body bearing groove 5 at assigned address and inserts in Closure cover system then, stretching by hydraulically extensible bar 14, adjust the gradient of covering system, climate parameter (the Different periods rainfall intensity that will simulate, wind speed, intensity of illumination etc.) with refuse landfill internal environment parameter (temperature) input environment state modulator and acquisition analysis system, during test, the dynamic change environment that Closure cover system head and bottom are simulated in artificial climate system 1 and the appointment of heating plate 13 is issued by environment parameter control and acquisition analysis system, the runoff of Closure cover system surfaces is collected respectively by runoff and sediment feeder 7 and rainwater-collecting groove 6, rainwater is oozed under silt and bottom, by water flow mud-sand monitoring system 10 kinetic measurement runoff, amount of rainfall is oozed under silt and bottom, 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, by the extension morphological parameters in vertical camera 2 and horizontal camera 3 dynamic monitoring Closure cover system surfaces vegetation blade and crack morphological parameters and Closure cover internal system vegetation root system and crack, by water flow mud-sand monitoring system 10, the parameter of stress-moisture-temperature-matric suction sensor group 4 and numerical value imaging system acquires, all import environment parameter control into by multichannel converter 17 and acquisition analysis system 16 carries out dynamic acquisition and analysis.
Claims (3)
1. refuse landfill sealing covering system environmental lapse and impermeable failure 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) is formed, electronic scale (12) is positioned on the carrying platform (19) bottom artificial climate system (1) inner bag, 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) 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) and rectangular model body bearing groove (5) junction have collection mouth, runoff and sediment feeder (7) is communicated with water flow mud-sand monitoring system (10) by second pipe (8), digital imaging system is made up of the vertical camera (2) in artificial climate system (1) and the horizontal camera (3) be 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) flanking central, stress-temperature-moisture monitoring system comprises stress more than two-moisture-sets of temperature sensors (4), stress-moisture-sets of temperature sensors (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 impermeable failure analog simulation system, is characterized in that: rectangular model body bearing groove (5) wall just right with horizontal camera (3) adopts glass material.
3. a kind of refuse landfill sealing covering system according to claim 1 environmental lapse and impermeable failure analog simulation system, is characterized in that: 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.
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| CN104049073B (en) * | 2014-06-18 | 2015-10-28 | 中国科学院武汉岩土力学研究所 | Compacted cohesive soil leakage preventing structure Cracking Failure simulation experiment system under a kind of environmental gradient effect |
| CN107014979A (en) * | 2017-04-13 | 2017-08-04 | 广西交通科学研究院有限公司 | A kind of side slope drying and watering cycle simulation test device |
| CN107271473B (en) * | 2017-08-22 | 2023-06-30 | 中国科学院西北生态环境资源研究院 | Indoor simulation system for influence of freeze thawing process on soil environment |
| CN109269942B (en) * | 2018-07-04 | 2022-04-01 | 上海大学 | Overburden layer water-gas two-phase migration simulation test device, overburden layer water-gas two-phase migration simulation test method and overburden layer water-gas two-phase migration simulation test method |
| CN108901659A (en) * | 2018-07-04 | 2018-11-30 | 东南大学 | The structure and its implementation method for preventing contaminated site engineering earthing from cracking using vegetation |
| CN110618006B (en) * | 2019-10-15 | 2022-06-14 | 上海大学 | Water-force characteristic test sample preparation and harmful gas reduction efficiency test device |
| 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 |
| CN113156086A (en) * | 2021-04-21 | 2021-07-23 | 福州大学 | Test system for simulating water, gas, heat and force coupling migration influence of vegetation on unsaturated soil coverage or side slope in all weather |
| CN114136677B (en) * | 2021-11-26 | 2023-09-08 | 中铁隧道局集团有限公司 | Comprehensive monitoring experiment platform of slurry shield equipment |
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| DE3327153A1 (en) * | 1983-07-28 | 1985-02-14 | Hans-Jörg Dipl.-Kfm. 4400 Münster Hübner | METHOD AND MEASURING DEVICE FOR MEASURING AND PROCESSING PARAMETERS OF THE ENVIRONMENTAL ATMOSPHERES, IN PARTICULAR CONCENTRATIONS OF VARIOUS GASES IN THE WEATHER CURRENT UNDERGROUND |
| US4626992A (en) * | 1984-05-21 | 1986-12-02 | Motion Analysis Systems, Inc. | Water quality early warning system |
| CN101162220B (en) * | 2006-10-16 | 2012-07-25 | 中国科学院武汉岩土力学研究所 | Monitoring test system for burying gas and leachate transmit process |
| CN101216404B (en) * | 2007-12-27 | 2010-06-30 | 中国科学院武汉岩土力学研究所 | Air pressure temperature control type landfill pollutant transfer characteristic test system |
| CN201940413U (en) * | 2011-01-11 | 2011-08-24 | 北京合嘉鑫诺市政工程有限公司 | Cover system for landfill closure site |
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