CN101504354B - A penetration deformation test device for landfill liner anti-seepage material - Google Patents
A penetration deformation test device for landfill liner anti-seepage material Download PDFInfo
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Abstract
Description
技术领域technical field
本发明公开了一种垃圾填埋场衬垫防渗材料渗透变形试验装置，属于测试仪器类。The invention discloses a seepage deformation test device for liner anti-seepage material of garbage landfill site, which belongs to the category of testing instruments.
背景技术Background technique
垃圾日益增长、无害化处理率低、环境污染严重，已成为制约我国垃圾填埋乃至整个国民经济可持续发展的瓶颈。近年来，城市生活垃圾的年增长率均在8％-10％。卫生填埋作为一种成本较低、技术相对简单、能迅速处理垃圾的方式而成为我国主要的垃圾处理形式。为了阻止垃圾渗滤液对填埋场周边的土壤与地下水环境的污染，在填埋场的底部和四侧通常建有衬垫系统。最近几年，HDPE土工膜和土工聚合粘土垫(GCL：Geosnythetic Clay Liner)构成的复合防渗衬垫系统越来越受到研究者们的关注。这种衬垫系统不仅具有土工膜的良好防渗能力，且GCL层具有抗剪强度高、抗沉降能力强、吸附能力大、施工方便等优点。可以将废物与周围环境隔离开来，阻止、延迟或限制渗滤液向下迁移而污染地下水。因此，HDPE土工膜和GCL构成的复合衬垫系统在填埋场建设中的应用越来越广泛。填埋场复合衬垫系统的稳定分析与可靠性设计是关系填埋场经济和安全的重要问题，填埋场衬垫防渗系统在施工和运行过程中，由于各种原因，导致其防护功能的局部或整体丧失。填埋场衬垫系统失稳将引起填埋场渗滤液潜在性泄漏，污染周围水土环境，造成了严重的环境地质灾害，已经引起了国际环境岩土工程界的高度关注。Garbage is increasing day by day, the rate of innocuous treatment is low, and environmental pollution is serious, which has become a bottleneck restricting the sustainable development of my country's landfill and even the entire national economy. In recent years, the annual growth rate of municipal solid waste is 8%-10%. Sanitary landfill has become the main form of waste disposal in my country as a way of low cost, relatively simple technology, and rapid disposal of waste. In order to prevent landfill leachate from polluting the soil and groundwater surrounding the landfill, a liner system is usually built at the bottom and four sides of the landfill. In recent years, the composite anti-seepage liner system composed of HDPE geomembrane and geotechnical polymer clay pad (GCL: Geosnythetic Clay Liner) has attracted more and more attention from researchers. This liner system not only has the good anti-seepage ability of geomembrane, but also the GCL layer has the advantages of high shear strength, strong anti-settling ability, large adsorption capacity, and convenient construction. It can isolate waste from the surrounding environment, prevent, delay or limit the downward migration of leachate and pollute groundwater. Therefore, the composite liner system composed of HDPE geomembrane and GCL is more and more widely used in landfill construction. The stability analysis and reliability design of the landfill composite liner system are important issues related to the economy and safety of the landfill site. During the construction and operation of the landfill liner anti-seepage system, due to various reasons, its protective function partial or total loss. The instability of the landfill liner system will cause potential leakage of landfill leachate, pollute the surrounding water and soil environment, and cause serious environmental geological disasters, which has attracted great attention from the international environmental geotechnical engineering community.
填埋场复合衬垫防渗系统是填埋场工程结构中的关键部分，我国《生活垃圾卫生填埋技术规范》(CJJ17-2004)与和《生活垃圾填埋场污染控制标准》(GB16889-2008)推荐采用复合衬垫防渗系统。填埋场的衬垫系统应具有良好的防渗功能，其渗透系数必须小于1×10-7cm/s。为了满足衬垫系统的低渗透性能，作为衬垫的建筑材料不仅必须具有极低的渗透系数，且具有较大的抗压、抗剪强度以阻止衬垫的变形破坏。尽管包含有土工织物和粘土层等土工合成材料构成的复合衬垫防渗系统能起到很好的防渗作用，但由于粘土与土工合成材料、土工合成材料与土工合成材料界面之间的剪切强度较低，造成衬垫系统可能存在的内部失稳，或者衬垫系统界面发生滑动破坏。HDPE和GCL构成的复合衬垫系统其防渗效果主要取决于材料本身的渗透性能和抗剪、抗压强度。由于填埋场中的垃圾堆体会对衬垫产生比较大的压应力与剪应力，HDPE土工膜和GCL很可能在压力与剪力的作用下产生比较大的变形，进而引起衬里的破坏。目前，关于衬垫防渗的研究主要集中在水平防渗上，而填埋场的衬垫同时也存在侧向渗漏的问题。在填埋场的四侧，随着坡角的变化，HDPE土工膜和GCL垫所受的剪应力会产生明显的变化。即使在同一坡角下，垃圾堆体的填埋高度的变化也会影响复合衬垫系统的剪应力和拉力。另外，土工膜和GCL垫接触面的应力也会随着坡角和垃圾堆体的变化发生明显的改变。为了合理的设计填埋场衬垫及掌握其应力和变形特性，研究不同坡角、不同填埋压力的作用下，HDPE土工膜、GCL垫及接触面的剪应力和变形破坏形式显得尤为突出。因此，很有必要开展复杂环境条件下复合衬垫系统与土体之间、以及不同土工合成材料之间相互作用变形特性的试验研究，为填埋场工程设计部门提供必要的技术参数。The anti-seepage system of the composite liner of the landfill is a key part of the engineering structure of the landfill. my country's "Technical Specifications for Domestic Waste Sanitary Landfill" (CJJ17-2004) and "Standards for Pollution Control of Domestic Waste Landfill Sites" (GB16889- 2008) recommended the composite liner anti-seepage system. The liner system of the landfill should have a good anti-seepage function, and its permeability coefficient must be less than 1×10 -7 cm/s. In order to meet the low permeability of the liner system, the building material used as the liner must not only have an extremely low permeability coefficient, but also have a large compressive and shear strength to prevent the liner from being deformed and damaged. Although the composite liner anti-seepage system composed of geotextile and clay layer and other geosynthetic materials can play a good role in anti-seepage, due to the shear between the interface between clay and geosynthetics, and geosynthetics and geosynthetics The shear strength is low, resulting in possible internal instability of the lining system, or sliding failure at the interface of the lining system. The anti-seepage effect of the composite liner system composed of HDPE and GCL mainly depends on the permeability and shear and compressive strength of the material itself. Since the garbage in the landfill will generate relatively large compressive and shear stresses on the liner, the HDPE geomembrane and GCL are likely to produce relatively large deformation under the action of pressure and shear force, which will cause damage to the liner. At present, the research on liner anti-seepage mainly focuses on horizontal anti-seepage, and the liner of landfill also has the problem of lateral leakage. On the four sides of the landfill, as the slope angle changes, the shear stress on the HDPE geomembrane and GCL pad will change significantly. Even under the same slope angle, the change of the landfill height of the garbage dump will affect the shear stress and tension of the composite liner system. In addition, the stress at the interface between the geomembrane and the GCL pad will also change significantly with the slope angle and the change of the garbage dump. In order to reasonably design the landfill liner and grasp its stress and deformation characteristics, it is particularly prominent to study the shear stress and deformation failure modes of HDPE geomembrane, GCL pad and contact surface under different slope angles and different landfill pressures. Therefore, it is necessary to carry out experimental research on the interaction deformation characteristics between the composite liner system and the soil, and between different geosynthetic materials under complex environmental conditions, so as to provide the necessary technical parameters for the landfill engineering design department.
发明内容Contents of the invention
针对上述存在的问题，本发明的目的在于提供一种垃圾填埋场衬垫防渗材料渗透变形试验装置，该仪器具有测定垃圾填埋场防渗材料透系数和变形量的功能，同时也具备可以测定在不同压力下的渗透系数的功能，其技术解决方案为：In view of the problems mentioned above, the object of the present invention is to provide a kind of penetration deformation test device for liner anti-seepage material of waste landfill. It is possible to determine the function of the permeability coefficient under different pressures, and its technical solution is:
一种垃圾填埋场衬垫防渗材料渗透变形试验装置，它包括加压装置、数据控制装置(18)、测试容器、数据处理装置(19)，所述的测试容器由两个带有翼缘的空心半球A和空心半球B构成，空心半球A和空心半球B之间设置有衬垫防渗材料(17)，衬垫防渗材料(17)两侧安装有第一压力传感器(14)和第二压力传感器(15)，在位于空心半球B一侧设置有位移传感器(16)。空心半球A为渗透腔，空心半球B为测试腔，空心半球A上设置有加压装置连接口(9)和渗透溶液进口连接口(5)，加压装置连接口(9)位于渗透溶液进口连接口(5)的上方，空心半球B上设置有渗透溶液出口连接口(10)，空心半球A和空心半球B之间通过翼缘螺栓连接，在空心半球A和空心半球B的底部分别设有第一连接口(2)、第二连接口(13)，第一连接口(2)和第二连接口(13)之间用软管连接，软管上设置有控制阀门(1)。空心半球A和空心半球B的翼缘上分别设置有对应的嵌槽，嵌槽中设置有密封橡胶圈。加压装置连接口(9)外接加压装置，加压装置包括空气压缩机(6)、第二阀门(7)和气压计(8)，空气压缩机(6)、第二阀门(7)、气压计(8)和加压装置连接口(9)串联连接，第二阀门(7)设置在空气压缩机(6)和气压计(8)之间。渗透溶液进口连接口(5)外接有第一流量计(3)和第一阀门(4)，第一流量计(3)设置在渗透溶液进口连接口(5)和第一阀门(4)之间。渗透溶液出口连接口(10)外接有第二流量计(11)和第三阀门(12)，第二流量计(11)设置在渗透溶液出口连接口(10)和第三阀门(12)之间。A penetration deformation test device for liner anti-seepage material of landfill site, it comprises pressurization device, data control device (18), test container, data processing device (19), described test container consists of two winged It is composed of hollow hemisphere A and hollow hemisphere B on the edge, and a liner anti-seepage material (17) is arranged between the hollow hemisphere A and hollow hemisphere B, and the first pressure sensor (14) is installed on both sides of the liner anti-seepage material (17) and the second pressure sensor (15), a displacement sensor (16) is arranged on one side of the hollow hemisphere B. The hollow hemisphere A is the osmosis chamber, the hollow hemisphere B is the test chamber, the hollow hemisphere A is provided with a pressure device connection port (9) and an infiltration solution inlet connection port (5), and the pressure device connection port (9) is located at the infiltration solution inlet Above the connection port (5), the hollow hemisphere B is provided with a permeate solution outlet connection port (10), and the hollow hemisphere A and the hollow hemisphere B are connected by flange bolts. There are a first connection port (2) and a second connection port (13). The first connection port (2) and the second connection port (13) are connected by a flexible pipe, and a control valve (1) is arranged on the flexible pipe. The flanges of the hollow hemisphere A and the hollow hemisphere B are respectively provided with corresponding slots, and sealing rubber rings are provided in the slots. The pressurizing device connection port (9) is externally connected to the pressurizing device, and the pressurizing device includes an air compressor (6), a second valve (7) and a barometer (8), an air compressor (6), a second valve (7) 1. The barometer (8) is connected in series with the connection port (9) of the pressurizing device, and the second valve (7) is arranged between the air compressor (6) and the barometer (8). The infiltration solution inlet connection port (5) is externally connected with a first flow meter (3) and a first valve (4), and the first flow meter (3) is arranged between the infiltration solution inlet connection port (5) and the first valve (4) between. A second flow meter (11) and a third valve (12) are externally connected to the permeate solution outlet connection port (10), and the second flow meter (11) is arranged between the permeate solution outlet connection port (10) and the third valve (12) between.
由于采用了以上技术方案，本发明的垃圾填埋场衬垫防渗材料渗透变形试验装置，具有精确模拟和测定垃圾填埋场防渗材料的渗透系数及变形和不同角度下的渗透系数，也可以测定不同压力下的渗透系数。该试验装置还可以测定土工膜两侧压力和压力差，为土工膜在某一定压力下的变形提供参量，建立压力-变形量关系。整个试验装置的数据采用电信号采集，保证了数据采集的同时性，使得测定的渗透系数更为精确。除以上各方面的优点外，本实验装置测得渗透系数可以直接读取，同时也可以建立压力-渗透系数以及压力-变形量之间的关系。Due to the adoption of the above technical scheme, the seepage deformation test device of the landfill liner anti-seepage material of the present invention has the functions of accurately simulating and measuring the permeability coefficient and deformation of the anti-seepage material of the landfill and the permeability coefficient under different angles, and also The permeability coefficient at different pressures can be determined. The test device can also measure the pressure and pressure difference on both sides of the geomembrane, provide parameters for the deformation of the geomembrane under a certain pressure, and establish a pressure-deformation relationship. The data of the entire test device is collected by electrical signals, which ensures the simultaneity of data collection and makes the measured permeability coefficient more accurate. In addition to the advantages of the above aspects, the permeability coefficient measured by this experimental device can be read directly, and the relationship between pressure-permeability coefficient and pressure-deformation can also be established.
附图说明：Description of drawings:
图1是本发明的一种垃圾填埋场衬垫防渗材料渗透变形试验装置的结构示意图。Fig. 1 is a schematic structural view of a seepage deformation test device for a landfill liner anti-seepage material according to the present invention.
图2是本发明的一种垃圾填埋场衬垫防渗材料渗透变形试验装置的使用状态示意图。Fig. 2 is a schematic view of the use state of the seepage deformation test device for the anti-seepage material of the landfill liner of the present invention.
具体实施方式Detailed ways
下面结合附图对本发明的一种垃圾填埋场衬垫防渗材料渗透变形试验装置进一步详细描述：见附图Below in conjunction with accompanying drawing, a kind of landfill liner anti-seepage material seepage deformation test device of the present invention is further described in detail: see accompanying drawing
一种垃圾填埋场衬垫防渗材料渗透变形试验装置，它包括加压装置、数据控制装置(18)、测试容器、数据处理装置(19)、第一压力传感器(14)和第二压力传感器(15)、垃圾填埋场衬垫防渗材料(17)、位移传感器(16)、第一流量计(3)和第二流量计(11)和第一阀门(4)、第二阀门(7)、第三阀门(12)。加压装置包括空气压缩机(6)、第二阀门(7)和气压计(8)，测试容器由两个带有翼缘的空心半球A和空心半球B构成，两个空心半球A和空心半球B之间设置有衬垫防渗材料(17)，空心半球A为渗透腔，空心半球B为测试腔，空心半球A上设置有加压装置连接口(9)和渗透溶液进口连接口(5)，加压装置连接口(9)位于渗透溶液进口连接口(5)的上方，空心半球B上设置有渗透溶液出口连接口(10)，空心半球A和空心半球B之间通过翼缘螺栓连接，在空心半球A和空心半球B的底部分别设有第一连接口(2)、第二连接口(13)，第一连接口(2)和第二连接口(13)之间用软管连接，软管上设置有控制阀门(1)。空心半球A和空心半球B的翼缘上分别设置有对应的嵌槽，嵌槽中设置有密封橡胶圈。加压装置连接口(9)外接加压装置，加压装置包括空气压缩机(6)、第二阀门(7)和气压计(8)，空气压缩机(6)、第二阀门(7)、气压计(8)和加压装置连接口(9)串联连接，第二阀门(7)设置在空气压缩机(6)和气压计(8)之间。渗透溶液进口连接口(5)外接有第一流量计(3)和第一阀门(4)，第一流量计(3)设置在渗透溶液进口连接口(5)和第一阀门(4)之间。渗透溶液出口连接口(10)外接有第二流量计(11)和第三阀门(12)，第二流量计(11)设置在渗透溶液出口连接口(10)和第三阀门(12)之间。A test device for seepage deformation test of anti-seepage material of landfill liner, which comprises a pressurizing device, a data control device (18), a test container, a data processing device (19), a first pressure sensor (14) and a second pressure sensor Sensor (15), landfill liner anti-seepage material (17), displacement sensor (16), first flowmeter (3) and second flowmeter (11) and first valve (4), second valve (7), the third valve (12). The pressurizing device includes an air compressor (6), a second valve (7) and a barometer (8). The test container is composed of two hollow hemispheres A and B with flanges, and the two hollow hemispheres A and hollow A liner anti-seepage material (17) is arranged between the hemispheres B, the hollow hemisphere A is the permeation chamber, the hollow hemisphere B is the test chamber, and the hollow hemisphere A is provided with a connection port of a pressurizing device (9) and an inlet connection port of the permeation solution ( 5), the connection port (9) of the pressurizing device is located above the inlet connection port (5) of the osmotic solution, the hollow hemisphere B is provided with the outlet connection port (10) of the osmotic solution, and the hollow hemisphere A and the hollow hemisphere B pass through the flange Bolt connection, the bottom of the hollow hemisphere A and the hollow hemisphere B are respectively provided with a first connection port (2) and a second connection port (13), between the first connection port (2) and the second connection port (13) A hose is connected, and a control valve (1) is arranged on the hose. The flanges of the hollow hemisphere A and the hollow hemisphere B are respectively provided with corresponding slots, and sealing rubber rings are provided in the slots. The pressurizing device connection port (9) is externally connected to the pressurizing device, and the pressurizing device includes an air compressor (6), a second valve (7) and a barometer (8), an air compressor (6), a second valve (7) 1. The barometer (8) is connected in series with the connection port (9) of the pressurizing device, and the second valve (7) is arranged between the air compressor (6) and the barometer (8). The infiltration solution inlet connection port (5) is externally connected with a first flow meter (3) and a first valve (4), and the first flow meter (3) is arranged between the infiltration solution inlet connection port (5) and the first valve (4) between. A second flow meter (11) and a third valve (12) are externally connected to the permeate solution outlet connection port (10), and the second flow meter (11) is arranged between the permeate solution outlet connection port (10) and the third valve (12) between.
工作时，测试容器连接加压装置、第一流量计(3)和第二流量计(11)，第一阀门(4)、第二阀门(7)、第三阀门(12)及控制阀门(1)全部开通，两个带有翼缘的空心半球A和空心半球B放置待测的衬垫防渗材料(17)，衬垫防渗材料(17)为HDPE土工膜或GCL复合防渗膜。衬垫防渗材料(17)两侧安装有第一压力传感器(14)和第二压力传感器(15)，在位于空心半球B一侧设置有位移传感器(16)，第一压力传感器(14)和第二压力传感器(15)检测衬垫防渗材料(17)两侧的压力，位移传感器(16)检测防渗材料(17)的变形量。空心半球A和空心半球B通过螺栓在翼缘位置连接，空心半球A和空心半球B的翼缘上分别设置有对应的嵌槽，嵌槽中设置有密封橡胶圈，且嵌槽相互啮合，通过橡胶圈形成密封球体。渗透溶液通过设置在空心半球A上的位于加压装置连接口(9)下方的渗透溶液进口连接口(5)进入到空心半球A渗透腔，同时也经过分别设置在空心半球A、空心半球B上的第一连接口(2)和第二连接口(13)的软管进入到空心半球B测试腔内，待空心半球A渗透腔和空心半球B测试腔被充满后，此时关闭控制阀门(1)，并且加压装置的空气压缩机向空心半球A渗透腔内鼓入压力气体，气压计(8)测试气体压力，第二阀门(7)调节气体流量。串联在连接第一阀门(4)和渗透溶液进口连接口(5)之间的管道上的第一流量计(3)测定关闭控制阀门(1)后进入空心半球A渗透腔的渗透溶液的流量，第一阀门(4)用于调节渗透溶液的流量。渗透溶液在渗透时，会经过设在空心半球B上的渗透溶液出口连接口(10)经管道流出，设在渗透溶液出口连接口(10)和第三阀门(12)之间的第二流量计(11)测定流出的渗透溶液流量，当容器斜置时第三阀门(12)用于调节渗透溶液流出的流量，确保渗透平衡。第一流量计(3)和第二流量计(11)分别连接到数据控制装置(18)，数据控制装置(18)用于暂时存储位移传感器(16)、第一压力传感器(14)和第二压力传感器(15)、第一流量计(3)和第二流量计(11)的数据，并传输数据到数据处理装置(19)，数据处理装置(19)通过预设的程序进行数据演算并显示出相关结果。During work, the test container is connected with the pressurizing device, the first flow meter (3) and the second flow meter (11), the first valve (4), the second valve (7), the third valve (12) and the control valve ( 1) All open, two hollow hemispheres A and B with flanges place the liner anti-seepage material (17) to be tested, the liner anti-seepage material (17) is HDPE geomembrane or GCL composite anti-seepage membrane . A first pressure sensor (14) and a second pressure sensor (15) are installed on both sides of the liner anti-seepage material (17), and a displacement sensor (16) is arranged on one side of the hollow hemisphere B, and the first pressure sensor (14) And the second pressure sensor (15) detects the pressure on both sides of the liner anti-seepage material (17), and the displacement sensor (16) detects the deformation amount of the anti-seepage material (17). The hollow hemisphere A and the hollow hemisphere B are connected at the flange position by bolts. The flanges of the hollow hemisphere A and the hollow hemisphere B are respectively provided with corresponding slots, and the sealing rubber rings are arranged in the slots, and the slots are engaged with each other. The rubber ring forms a sealing sphere. The osmotic solution enters the osmotic chamber of the hollow hemisphere A through the osmotic solution inlet connection port (5) arranged on the hollow hemisphere A and located below the connection port (9) of the pressurizing device, and also passes through the hollow hemisphere A and the hollow hemisphere B respectively. The flexible tubes of the first connection port (2) and the second connection port (13) on the top enter the hollow hemisphere B test chamber, and after the hollow hemisphere A permeation chamber and the hollow hemisphere B test chamber are filled, close the control valve at this time (1), and the air compressor of the pressurizing device blows pressure gas into the permeation chamber of the hollow hemisphere A, the barometer (8) tests the gas pressure, and the second valve (7) regulates the gas flow. The first flow meter (3) connected in series on the pipeline between the first valve (4) and the inlet connection port (5) of the permeate solution measures the flow rate of the permeate solution entering the permeate chamber of the hollow hemisphere A after the control valve (1) is closed , the first valve (4) is used to adjust the flow of the permeate solution. When the permeate solution permeates, it will flow out through the pipeline through the permeate solution outlet connection port (10) arranged on the hollow hemisphere B, and the second flow rate between the permeate solution outlet connection port (10) and the third valve (12) Meter (11) measures the flow rate of the osmosis solution flowing out, and the third valve (12) is used to adjust the flow rate of the osmosis solution outflow when the container is tilted, so as to ensure the balance of osmosis. The first flow meter (3) and the second flow meter (11) are respectively connected to the data control device (18), and the data control device (18) is used for temporarily storing the displacement sensor (16), the first pressure sensor (14) and the second flow sensor (14). The data of two pressure sensors (15), the first flow meter (3) and the second flow meter (11), and transmit the data to the data processing device (19), and the data processing device (19) carries out data calculation by the preset program and display relevant results.
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| CN101865754B (en) * | 2010-07-20 | 2012-11-21 | 哈尔滨工业大学 | Method for detecting gas tightness of composite material laminated plate |
| CN103088851B (en) * | 2013-01-31 | 2014-10-15 | 中国科学院武汉岩土力学研究所 | Effect losing damage simulation system for composite seepage-proofing liner |
| CN104034642B (en) * | 2014-06-03 | 2016-02-17 | 同济大学 | Large garbage soil permeability coefficient measuring instrument |
| CN104122185B (en) * | 2014-07-22 | 2016-10-05 | 浙江理工大学 | The compression of a kind of refuse soil and infiltration relation analyzer |
| CN104390863B (en) * | 2014-11-25 | 2017-02-01 | 河海大学 | Flexible impervious body joint structure hydraulic dynamic tester and test method |
| CN105132272B (en) * | 2015-09-06 | 2017-10-20 | 山东省医疗器械产品质量检验中心 | One kind resistance bacterium property experimental rig and test method |
| CN106018109B (en) * | 2016-06-29 | 2019-05-03 | 济南大学 | A Continuous and Stable Pressurized Geomembrane Liquid Expansion Deformation Mechanical Test Device |
| CN108225432B (en) * | 2018-01-18 | 2020-04-28 | 常州工学院 | Refuse landfill impervious wall model testing device and manufacturing method thereof |
| CN109115134B (en) * | 2018-09-21 | 2023-09-01 | 镇江科易工程检测技术有限公司 | Hydraulic deformation test sensor |
| CN111705848B (en) * | 2019-08-09 | 2021-12-10 | 乐清市泰博恒电子科技有限公司 | Arrangement method of tracking monitoring wells of landfill seepage-proofing system |
| CN111024578A (en) * | 2019-12-03 | 2020-04-17 | 中铁十局集团第五工程有限公司 | Simulation tank testing device and testing method for underground diaphragm wall |
| CN111495920B (en) * | 2020-04-29 | 2022-04-08 | 中国科学院武汉岩土力学研究所 | Landfill ventilation system gas injection and extraction regulation and control method |
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