GB/T 51403-2021 English PDFUS$1319.00 · In stock
Delivery: <= 8 days. True-PDF full-copy in English will be manually translated and delivered via email. GB/T 51403-2021: (Engineering Technical Standards for Seepage Control System of Domestic Waste Sanitary Landfill Site) Status: Valid
Basic dataStandard ID: GB/T 51403-2021 (GB/T51403-2021)Description (Translated English): (Engineering Technical Standards for Seepage Control System of Domestic Waste Sanitary Landfill Site) Sector / Industry: National Standard (Recommended) Classification of Chinese Standard: P53 Word Count Estimation: 66,658 Issuing agency(ies): Ministry of Housing and Urban-Rural Development of the People's Republic of China; State Administration for Market Regulation GB/T 51403-2021: (Engineering Technical Standards for Seepage Control System of Domestic Waste Sanitary Landfill Site)---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order. 1 General 1.0.1 This standard is formulated in order to ensure the reliability and safety of the anti-seepage system engineering of domestic garbage sanitary landfills (hereinafter referred to as "landfills"), and to prevent the leakage of garbage leachate from polluting the surrounding environment. 1.0.2 This standard is applicable to the design, construction, acceptance and maintenance of anti-seepage system engineering of newly built, expanded and reconstructed landfill sites. 1.0.3 The design, construction, acceptance and maintenance of the anti-seepage system engineering of the landfill shall not only comply with this standard, but also comply with the current relevant national standards. 2 terms 2.0.1 anti-seepage system liner system A system composed of various materials selected for the construction of leachate anti-seepage barriers on the bottom of the landfill reservoir area and the regulating tank and on the surrounding slopes. 2.0.2 anti-seepage system liner structure The spatial level of anti-seepage system composed of various materials, including base layer, anti-seepage layer and its protective layer, leachate drainage system and groundwater drainage system. According to the type of anti-seepage layer, it can be divided into clay lining structure and synthetic lining structure. 2.0.3 Base layer liner foundation The foundation of the anti-seepage material is divided into the foundation layer at the bottom of the site and the foundation layer at the surrounding slopes. 2.0.4 anti-seepage layer sealing liner In the anti-seepage system, the combination of various materials selected for the construction of the leachate anti-seepage barrier. 2.0.5 leachate collection and removal system On the upper part of the anti-seepage system in the landfill reservoir area, it is a facility for collecting and exporting leachate. 2.0.6 groundwater collection and removal system In the lower part of the anti-seepage system, it is a facility for collecting and guiding groundwater. 2.0.7 leachate detection layer Layers of material used to test the reliability of double-layer containment systems in landfills. 2.0.8 anti-seepage system engineering material liner system engineering material The general term for various materials used in anti-seepage system engineering, including high-density polyethylene (HDPE) geomembrane, sodium-based bentonite waterproof blanket (GCL), geotextile, geocomposite drainage network, geotechnical filter, pebbles, high-density polymer Ethylene (HDPE) pipes, high-density polyethylene (HDPE) pipe fittings, high-density polyethylene (HDPE) ball valves, etc. 2.0.9 leachate head Taking the bottom surface of the drainage layer as the reference plane, the water head corresponding to the maximum pressure of leachate in the drainage layer. 2.0.10 single liner structure single liner structure An anti-seepage structure composed of an anti-seepage system engineering material and a base layer. 2.0.11 single layer composite liner The anti-seepage structure is composed of two or more anti-seepage materials closely connected. 2.0.12 double liner structure double liner structure It consists of two anti-seepage layers, and an anti-seepage structure with a leak detection layer between the two layers. 3 Anti-seepage system engineering materials 3.1 General provisions 3.1.1 Materials used in anti-seepage system engineering of landfills may include clay materials and geosynthetic materials. The soil materials used in the construction of the compacted clay anti-seepage layer shall meet the following requirements. 1 The dry weight of soil particles with a particle size less than 0.075mm should be greater than 25% of the total dry weight of soil particles; 2 The dry weight of soil particles with a particle size greater than 5mm should not exceed 20% of the total dry weight of soil particles; 3 The plasticity index should range from 15 to 30. 3.1.2 Geosynthetics used in landfills can be high-density polyethylene (HDPE) geomembrane, geotextile, bentonite waterproof blanket (GCL), geotechnical composite drainage net geotechnical filter, high-density polyethylene (HDPE) pipes, etc. 3.2 High-density polyethylene geomembrane 3.2.1 The high-density polyethylene geomembrane used in the landfill anti-seepage system project shall comply with the relevant provisions of the current industry standard "High-density polyethylene geomembrane for landfill" CJ/T 234, and shall also Meet the following requirements. 1 The thickness of the film should not be less than 1.5mm; 2 The width of the film should not be less than 6.0m. 3.2.2 When the anti-seepage requirements are strict or the height of the garbage pile is greater than 20m, a high-density polyethylene geomembrane with a thickness of not less than 2.0mm should be selected. 3.2.3 The appearance requirements of high-density polyethylene geomembrane shall comply with the provisions in Table 3.2.3. 3.3 Bentonite waterproof blanket 3.3.1 The bentonite waterproof blanket used for landfill anti-seepage system engineering should use sodium-based bentonite waterproof blanket, and can choose natural sodium-based bentonite waterproof blanket or artificial sodium-based bentonite waterproof blanket. In addition to the relevant provisions of the current industry standard "Sodium Bentonite Waterproof Blanket" JG/T 193, the selected sodium bentonite waterproof blanket should also meet the following requirements. 1 The mass per unit area should not be less than 5000g/m2; 2 The volume expansion of bentonite should not be less than 24mL/2g; 3 The tensile strength should not be less than 800N/100mm; 4 The peel strength should not be less than 65N/10cm; 5 The permeability coefficient should be less than 5×10-11m/s; 6 Anti-hydrostatic pressure 0.4MPa/1h, no leakage. 3.3.2 The powder-type bentonite waterproof blanket or granular bentonite waterproof blanket should be selected according to the anti-seepage requirements. In projects with high anti-seepage requirements, the powder-type bentonite waterproof blanket should be selected first. 3.3.3 The flatness of bentonite should be ensured and soil shortage should be prevented. 3.3.4 The bentonite waterproof blanket in the landfill anti-seepage system project should have a smooth surface, uniform thickness, and no holes or broken edges. The needle punching of acupuncture products should be uniform and dense, and there should be no residual broken needles. 3.4 Geotextiles and Geofilters 3.4.1 All kinds of geotextiles and geotechnical screens used in the anti-seepage system engineering of landfills shall comply with the current relevant national standards. 3.4.2 Non-woven geotextiles should be used for the protective layer of high-density polyethylene geomembrane, which should meet the requirements of the current industry standard "Nonwoven Geotextiles for Landfills" CJ/T 430, and the specification should not be less than 600g/m2. 3.4.3 Geotextile or geotechnical screen can be used as filter material for blind ditch and leachate collection and drainage layer, and the specification should not be less than.200g/m2. 3.4.4 Geotechnical screens should be used as materials for reverse filtration, and the geotechnical screens should comply with the relevant provisions of the current industry standard "Geotechnical Filters for Landfills" CJ/T 437, and the specification should not be less than.200g/m2. 3.5 Geotechnical drainage network 3.5.1 The geotechnical drainage net used for the anti-seepage system project of the landfill shall comply with the relevant provisions of the current industry standard "Geotechnical drainage net for landfill" CJ/T 452. 3.5.2 The selection of hydraulic conductivity of geotechnical drainage network should be determined according to creep reduction factor, geotextile embedding reduction factor, biological silting reduction factor, chemical silting reduction factor and chemical precipitation reduction factor, etc. 3.5.3 The geotechnical drainage net should be made of high-density polyethylene, and the longitudinal tensile strength should be greater than 8kN/m. 3.5.4 The geonet and geotextile in the geotechnical composite drainage network should be bonded in advance, and the bonding strength should be greater than 0.17kN/m. 3.6 High-density polyethylene pipes 3.6.1 The high-density polyethylene pipes used for the leachate collection and drainage system, leachate detection layer and groundwater collection and drainage system of the landfill anti-seepage system engineering shall comply with the current industry standard "High Density polyethylene pipes" CJ/T 371 related regulations. 3.6.2 Perforated pipes or solid pipes should be selected according to the requirements of drainage. Among them, the perforated tube should be used for collection, and the solid tube should be used for drainage. 3.6.3 The inner and outer surfaces of the pipes should be clean, smooth, free of bubbles, obvious scratches, dents, impurities, uneven colors and other defects. Pipe ends should be cut flat and perpendicular to the pipe axis. 4 Anti-seepage system design 4.1 General provisions 4.1.1 The engineering design of the anti-seepage system shall meet the general design requirements of the landfill site. Phases and partitions should be carried out according to the overall design of the landfill, and can be implemented in phases. 4.1.2 The anti-seepage system engineering should be able to effectively perform its functions within the service life of the landfill and the stabilization period after closure. 4.1.3 The anti-seepage system project shall prevent the groundwater and surface water from being polluted by landfill leachate, and shall prevent the groundwater and surface water from causing damage to the anti-seepage system. 4.1.4 The head of leachate on the anti-seepage layer in the landfill area of the landfill should not be greater than 0.3m, and the bottom of the anti-seepage layer should be kept at a distance of more than 1m from the annual maximum water level of the groundwater. 4.1.5 The bottom of the landfill and surrounding slopes should meet the requirements for overall and local stability. The anti-seepage system should provide stable support for the landfill pile. The friction between the material layers of the anti-seepage system should ensure the stability of the landfill pile. 4.1.6 When the vertical anti-seepage curtain is used in the landfill, the types can be cement-bentonite wall, soil-bentonite wall, plastic concrete wall, high-density polyethylene geomembrane-bentonite composite wall, etc. The anti-seepage of vertical curtains shall comply with the relevant current national standards. 4.2 Anti-seepage system 4.2.1 The design of the anti-seepage system shall meet the following requirements. 1 Reliable anti-seepage materials and corresponding protective layers should be selected; 2 The leachate collection and drainage system should be set up according to the topography of the landfill site to prevent the accumulation of leachate, and the leachate drainage system should have long-term and efficient drainage performance; 3 should have corresponding chemical corrosion resistance; 4 should have corresponding anti-aging ability; 5 The bottom of the landfill and surrounding slopes should be covered. 4.4.2 Natural clay anti-seepage layer and artificially modified compacted clay anti-seepage layer shall comply with the provisions of Article 4.2.4 of this standard. 4.4.3 The composite anti-seepage layer should have a certain thickness. In the high-density polyethylene geomembrane and clay composite anti-seepage layer under the film, the thickness of the high-density polyethylene geomembrane should not be less than 1.5mm, and the thickness of the compacted clay layer should not be less than 0.75m. When the bentonite waterproof blanket is used to replace the compacted clay layer in the composite anti-seepage layer, the permeability coefficient of the bentonite waterproof blanket should not be greater than 5×10-9cm/s, the specification should not be less than 4800g/m2, and the thickness of the compacted clay layer should not be less than 0.30m. 4.4.4 The high-density polyethylene geomembrane should use non-woven geotextile as the protective layer, and the specification should not be less than 600g/m2. 4.4.5 A compacted clay protective layer should be set under the single-layer anti-seepage layer of high-density polyethylene geomembrane and the composite anti-seepage layer of high-density polyethylene + bentonite waterproof blanket. The permeability coefficient should not be greater than 1.0×10-5cm/s, and the thickness Should not be less than 0.30mm. 4.4.6 In the double-layer anti-seepage structure, the main anti-seepage layer shall adopt composite anti-seepage layer, and the secondary anti-seepage layer may adopt natural clay anti-seepage layer or composite anti-seepage layer. A protective layer should be set under the main anti-seepage layer, and non-woven geotextile should be used, and the specification should not be less than 400g/m2.A protective layer should be set above the secondary anti-seepage layer, and non-woven geotextile should be used, and the specification should not be less than 600g/m2. 4.5 Leachate collection and drainage system 4.5.1 The leachate collection and drainage system shall include the drainage layer, blind ditch and leachate drainage system. 4.5.2 The design of leachate collection and drainage system shall meet the following requirements. 1 It should be able to collect and drain the landfill leachate collected at the bottom of the landfill and above the anti-seepage layer of the slope in a timely and effective manner; 2 The anti-seepage layer should not be damaged; 3 It should have the ability to prevent clogging; 4 The long-term reliability of the leachate collection and drainage system should be guaranteed. 4.5.3 The longitudinal slope of the leachate drainage system at the bottom of the landfill reservoir area should not be less than 2%. 4.5.4 All materials and structures in the leachate collection and drainage system shall have sufficient strength and stability to withstand loads such as garbage and covering materials and the effects of operating equipment. 4.5.5 The drainage layer should preferably use pebbles as the drainage material, and gravel can be used, and the particle size of the stone should be 20mm ~ 60mm. The calcium carbonate content of the stone should not be greater than 5%, and it should be washed before laying. The laying thickness should not be less than 300mm, and the permeability coefficient should not be less than 1×10-3m/s. Geotechnical composite drainage nets can be laid under the drainage layer to strengthen leachate drainage; geosynthetic materials such as geotechnical composite drainage nets should be laid as drainage materials on slopes, and slope protection layers should be laid on top of drainage materials. 4.5.6 The blind ditch design shall meet the following requirements. 1 The drainage material in the blind ditch should be pebbles or crushed stones. 2 Drainage pipes should be laid in the blind ditch, and high-density polyethylene perforated pipes should be used. The pipes should be placed in pebbles or gravel blind ditch, and a sand cushion should be set under it. The diameter of the pipe should be selected according to the amount of collection and drainage and long-term drainage performance, and it should have the ability to bear the load of construction machinery and garbage piles on it. 3 The blind ditch should be provided with a reverse filter layer, and the reverse filter material should be a geotechnical filter, and the specification should not be less than.200g/m2. 4.5.7 The upper part of the leachate collection and drainage system should be laid with reverse filter materials to prevent silting. The reverse filter material should be geotechnical filter, and the specification should not be less than.200g/m2. 4.5.8 The leachate discharge system should adopt gravity flow discharge. If gravity flow cannot be used to discharge leachate, a pump well should be installed. When the leachate discharge pipe needs to pass through the geomembrane, the connection should be sealed. 4.5.9 The design of the pump well shall meet the following requirements. 1 The pump well should have anti-seepage and anti-corrosion capabilities; 2.Reasonable well volume should be ensured; 3 The drainage pump should be reasonably configured; 4 Necessary safety measures should be taken. 4.5.10 In the double-layer anti-seepage structure, a leachate detection layer should be set between the main anti-seepage layer and the secondary anti-seepage layer to detect the leakage of the main anti-seepage layer in time, and it should be able to guide and drain the leachate in time. The thickness of the bottom detection layer should not be less than 300mm, and the setting should comply with the provisions of Article 4.5.5 of this standard; the slope detection layer can use geotechnical composite drainage network, and the thickness should not be less than 5mm. 4.6 Groundwater collection and drainage system 4.6.1 When the groundwater level is high and affects the stability of the foundation layer at the bottom of the site, or the infiltration of surface water around the landfill affects the foundation layer of the surrounding slopes, a groundwater collection and drainage system should be installed. 4.6.2 The groundwater collection and drainage system shall meet the following requirements. 1 It should be able to collect and drain underground water and infiltrate surface water in a timely and effective manner; 2.It should have the ability to prevent clogging; 3 The distance between the top of the groundwater collection and drainage system and the bottom of the anti-seepage layer of the anti-seepage system shall not be less than 1m; 4 The long-term reliability of the groundwater collection and drainage system shall be guaranteed. 4.6.3 The groundwater collection and drainage system can use a drainage layer or a blind drainage ditch. 4.6.4 When the groundwater collection and drainage system adopts the guiding and drainage blind ditch, it can be excavated on the base layer. The size, spacing and buried depth of the blind ditch should be reasonable, and the backfill should be compacted to meet the requirements of the foundation layer. 4.6.5 When the groundwater collection and drainage system adopts the drainage layer, it shall be set on the foundation layer, and stone or geotechnical composite drainage nets may be used, and shall meet the following requirements. 1 When the drainage layer is made of pebbles or crushed stones, the laying thickness should not be less than 0.30mm. The reverse filter layer should be laid on the top and bottom of the drainage layer. The reverse filter material should be a geotechnical filter, and the specification should not be less than.200g/m2; 2 When the geotechnical composite drainage network is selected for the drainage layer, the corresponding thickness of the geotechnical composite drainage network should be selected according to the seepage of groundwater. The geotechnical composite drainage net used for groundwater drainage should have sufficient tensile strength and compressive strength. 4.7 Seepage prevention of leachate adjustment tank 4.7.1 The leachate adjustment tank can be divided into a flexible adjustment tank and a rigid adjustment tank, both of which should be treated ...... Tips & Frequently Asked Questions:Question 1: How long will the true-PDF of GB/T 51403-2021_English be delivered?Answer: Upon your order, we will start to translate GB/T 51403-2021_English as soon as possible, and keep you informed of the progress. The lead time is typically 5 ~ 8 working days. The lengthier the document the longer the lead time.Question 2: Can I share the purchased PDF of GB/T 51403-2021_English with my colleagues?Answer: Yes. 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