GB 50794-2012 English PDFUS$1699.00 ยท In stock
Delivery: <= 10 days. True-PDF full-copy in English will be manually translated and delivered via email. GB 50794-2012: Code for construction of PV power station Status: Valid
Basic dataStandard ID: GB 50794-2012 (GB50794-2012)Description (Translated English): Code for construction of PV power station Sector / Industry: National Standard Classification of Chinese Standard: P61 Classification of International Standard: 27.100 Word Count Estimation: 77,790 Quoted Standard: GB 50017; GB 50018; GB 50026; GB/T 50107; GB 50119; GB 50141; GB 50147; GB 50148; GB 50149; GB 50150; GB 50166; GB 50168; GB 50169; GB 50171; GB 50172; GB 50173; GB 50201; GB 50202; GB 50203; GB 50204; GB 50205; GB 50207; GB 50209; GB 50210; GB 50233; GB Regulation (derived from): Ministry of Housing and Urban Notice No. 1429 Issuing agency(ies): Ministry of Housing and Urban-Rural Development of the People's Republic of China; General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China Summary: This Chinese standard applies to new construction, renovation and expansion of the ground and the roof grid -connected PV power stations, not for building integrated photovoltaic power generation project. GB 50794-2012: Code for construction of PV power station---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 In order to ensure the construction quality of photovoltaic power station projects, promote the improvement of engineering construction technology, and ensure the safety and reliability of photovoltaic power station construction, this specification is formulated. 1.0.2 This specification is applicable to newly built, rebuilt and expanded ground and roof grid-connected photovoltaic power stations, and not applicable to building-integrated photovoltaic power generation projects. 1.0.3 Before the construction of the photovoltaic power station, the construction organization design documents should be compiled, and a special emergency plan should be formulated. 1.0.4 The construction of photovoltaic power station projects shall not only comply with this specification, but also comply with the current relevant national standards. 2 terms 2.0.1 PV module Refers to the smallest indivisible solar battery combination device with packaging and internal connection, which can provide direct current output alone. Also known as solar cell components. 2.0.2 PV string PV string In a photovoltaic power generation system, several photovoltaic modules are connected in series to form a circuit unit with a certain DC output voltage. It is called component string or group string for short. 2.0.3 PV supporting bracket A special bracket designed for placing, installing and fixing photovoltaic modules in a photovoltaic power generation system. Referred to as the bracket. 2.0.4 Square array (photovoltaic square array) array (PV array) A DC power generation unit composed of several solar cell modules or solar panels mechanically and electrically assembled together in a certain way and with a fixed support structure. Also known as photovoltaic array. 2.0.5 combiner-box In the photovoltaic power generation system, several photovoltaic modules are connected in series and parallel and then connected. 2.0.6 tracking system tracking system Through the combined action of mechanical, electrical, electronic circuits and programs, it is a device that adjusts the spatial angle of the photovoltaic module plane to realize tracking of incident sunlight to increase the power generation of photovoltaic modules. 2.0.7 Inverter inverter A device that converts direct current into alternating current in a photovoltaic power station. 2.0.8 PV power station A power generation system that directly converts solar radiation energy into electrical energy by using the photovoltaic effect of solar cells. 2.0.9 grid-connected PV power station Photovoltaic power stations connected directly or indirectly to the public grid. 3 Basic Regulations3.0.1 The following conditions should be met before starting work. 1 Before the construction of the project starts, the construction unit shall obtain relevant construction permit documents. 2 The construction site should have the conditions of water, electricity, road, telecommunications and site leveling. 3 The qualifications of the construction unit, qualifications of special operators, construction machinery, construction materials, measuring instruments, etc. should be reported to the supervisory unit or construction unit for review. 4 The construction drawings necessary for the start of construction shall pass the joint review; the design disclosure shall be completed; the construction organization design and major construction plans shall have been approved; the project division and quality evaluation standards shall be determined. 5 The construction unit shall complete the layout of temporary construction facilities according to the requirements of the general construction layout drawing. 6 Engineering positioning measurement datum should be established. 3.0.2 The specifications of equipment and materials shall meet the design requirements, and unqualified equipment and materials shall not be used in the project. 3.0.3 The qualification certificates, manuals, test records, accessories, spare parts, etc. of the equipment and materials entering the site shall be complete. 3.0.4 The transportation and storage of equipment and equipment shall comply with the requirements of this specification; when the product has special requirements, it shall meet the special provisions of the product requirements. 3.0.5 Concealed works shall meet the following requirements. 1 Before the hidden project is concealed, the construction unit should conduct self-inspection according to the project quality assessment and acceptance standards, and submit an acceptance application to the supervisor after passing the self-inspection. 2 Concealment can only be carried out after passing the acceptance check by the supervisory engineer, and the concealed project acceptance visa form should be filled out in accordance with the relevant requirements of the current industry standard "Regulations for Acceptance and Evaluation of Construction Quality in Electric Power Construction" DL/T 5210. 3.0.6 The construction process records and related test records should be complete.4 civil works4.1 General provisions 4.1.1 The construction of civil works shall be carried out in accordance with the relevant provisions of the current national standard "Unified Standards for Construction Quality Acceptance of Construction Engineering" GB 50300. 4.1.2 The surveying and setting-out work shall be carried out in accordance with the relevant provisions of the current national standard "Code for Engineering Surveying" GB 50026. 4.1.3 When raw materials used in civil works enter the factory, the following tests shall be carried out. 1 When the raw materials enter the site, the variety, specifications, appearance and size should be checked and accepted. The material packaging should be intact, and there should be product qualification certificates, Chinese manuals and relevant performance test reports. 2 When the steel bar enters the site, the test piece should be taken for mechanical performance inspection according to the current national standard "Steel for Reinforced Concrete" GB 1499 and other regulations. 3 When the cement enters the site, its variety, grade, packaging or bulk warehouse number, date of delivery, etc. should be inspected, and its strength, stability and other necessary performance indicators should be re-inspected. Salt Cement" GB 175 and other regulations. 4.1.4 When the country stipulates or the contract stipulates that the witness test should be carried out on the material or when there is a dispute over the quality of the material, the witness test should be carried out. 4.1.5 Raw materials should be classified and stored after entering the site. Materials such as steel bars and cement should be stored in a dry place that can avoid rain and snow, and various protective measures should be taken. 4.1.6 The construction of concrete structures shall comply with the relevant provisions of the current national standard "Code for Construction Quality Acceptance of Concrete Structures" GB 50204. 4.1.7 For concrete mixed with admixtures, the relevant quality and application technology shall comply with the relevant provisions of the current national standard "Concrete Admixtures" GB 8076 and "Technical Specifications for the Application of Concrete Admixtures" GB 50119. 4.1.8 The winter construction of concrete shall comply with the relevant provisions of JGJ/T 104, the current industry standard "Code for Winter Construction of Construction Engineering". 4.1.9 For buildings (structures) that require settlement observation, settlement observation signs shall be set up in time, and settlement observation records shall be made well. 4.1.10 Concealed works may include. steel bar inspection before concrete pouring, quality inspection before backfilling of concrete foundation groove, etc. The acceptance of concealed works shall meet the requirements of Article 3.0.5 of this code. 4.2 Earthworks 4.2.1 The construction of earthworks should implement the relevant provisions of the current national standard "Code for Construction Quality Acceptance of Building Foundation Engineering" GB 50202, and the construction of earthworks for deep foundation pit foundations should also implement the current industry standard "Technical Regulations for Building Foundation Pit Support" "Relevant provisions of JGJ 120. 4.2.2 In case of blasting works in the construction of earthworks, it shall be implemented in accordance with the relevant provisions of the current national standard "Code for Construction and Acceptance of Earthworks and Blasting Works" GB 50201. 4.2.3 Before the construction of the project, the elevation control network and plane control network of the whole site shall be established. Necessary protective measures shall be taken for elevation control points and plane control points, and retesting shall be carried out regularly. 4.2.4 Before earthwork excavation, the original underground facilities shall be marked and corresponding protective measures shall be taken. 4.2.5 When the support foundation adopts the full-length excavation method, under the premise of ensuring the safety of the foundation pit, the earthwork that needs to be backfilled should be stacked nearby, and the excess earthwork should be transported to the spoil site for stacking. 4.2.6 If there is a requirement for the compactness of the backfill, it shall be qualified by testing. 4.3 Bracket foundation 4.3.1 The construction of concrete independent foundations and strip foundations shall be carried out in accordance with the relevant provisions of the current national standard "Code for Construction Quality Acceptance of Concrete Structure Engineering" GB 50204, and shall meet the following requirements. 1 Before concrete pouring, the foundation pit should be checked and accepted, and the axis, foundation pit size, and base elevation should meet the design requirements. The floating soil and debris in the foundation pit should be cleaned up. 2 After the basic formwork is removed, the appearance quality and dimensional deviation should be checked, and the defects should be dealt with in time. 3 The exposed metal embedded parts shall be treated with anticorrosion. 4 When pouring concrete for the same support foundation, it is advisable to complete the pouring at one time. The intermittent time of concrete pouring should not exceed the initial setting time of the concrete. If the initial setting time of the concrete exceeds the initial setting time of the concrete, construction joints should be treated. 5 After the concrete pouring is completed, effective maintenance measures should be taken in time. 6.Before the support foundation is installed, the concrete shall be cured to reach 70% strength. 7 The concrete construction of the support foundation shall be divided into several inspection batches according to the working shift and construction section according to the principle of being consistent with the construction method and facilitating the control of construction quality. 8 The precast concrete foundation should not have dimensional deviations that affect the structural performance and use functions. For parts that exceed the allowable dimensional deviation and affect structural performance and use functions, they should be treated according to the technical treatment plan, and re-inspected and accepted. 4.3.2 The construction of the pile foundation shall implement the current national standard "Code for Construction Quality Acceptance of Building Foundation Engineering" GB 50202 and the relevant provisions of "Technical Specifications for Building Pile Foundation" JGJ 94, and shall meet the following requirements. 1.The appearance and quality of the pile body should be inspected after entering the site and before construction for the pressure (driving and rotating) piles. 2 The position of the pile-forming equipment should be stable, and the equipment should not be tilted or shifted during the pile-forming process. 3 During the pile pressing process, the pressure, pile verticality and pressing depth should be checked. 4 During the construction process of pressing (driving and screwing) piles, the pile body should be kept vertical and should not be loaded eccentrically. 5.The depth control scale shall be set on the drill tool for drilling the cast-in-place pile, and shall be observed and recorded during construction. 6 During the construction of cast-in-situ piles, the whole process of hole formation, slag removal, placement of steel cages, and pouring of concrete (cement slurry) should be inspected. 7 Concrete (cement slurry) should be poured as soon as possible after the hole quality inspection of the cast-in-situ pile is qualified. 8 For the strength and bearing capacity detection of the pile-type support foundation, it is advisable to carry out random inspections in different areas according to the principle of controlling construction quality. 4.3.3 The construction of the roof support foundation shall meet the following requirements. 1 The construction of the support foundation shall not damage the main structure of the original building and the waterproof layer. 2 The support foundation of the new roof should be constructed together with the main structure. 3 When the steel structure is used as the support foundation, the construction of the roof waterproofing project should be completed before the construction of the steel structure support, and the roof waterproof layer should not be damaged during the construction of the steel structure support. 4 If it affects the waterproof structure of the original building, it should be re-waterproofed according to the original waterproof structure. 5 The grounded flat steel and angle steel should be treated with anticorrosion. 4.3.4 The deviation of support foundation and embedded bolts (embedded parts) shall meet the following requirements. 1 The size tolerance of concrete independent foundation and strip foundation shall comply with the provisions in Table 4.3.4-1. 2 The allowable deviation of pile foundation size shall comply with the provisions in Table 4.3.4-2. 3 The permissible deviation of the embedded bolts (embedded parts) of the support foundation shall comply with the provisions in Table 4.3.4-3. 4.4 Site and underground facilities 4.4.1 The road construction of the photovoltaic power station should be carried out in a combination of permanent and temporary. 4.4.2 The waterproof slope and construction quality of the road shall meet the design requirements. 4.4.3 In addition to meeting the design requirements, the construction of cable trenches should also meet the following requirements. 1 Waterproof measures should be taken for the reserved holes in the cable trench. 2 The construction quality of deformation joints in cable trenches should be strictly controlled. 3 Waterproof measures should be taken for the outdoor cable trench cover. 4.4.4 The construction of water supply and drainage pipelines in the station area shall meet the following requirements. 1.The buried water supply and drainage pipes should be considered as a whole with the construction of roads or buildings on the ground, first underground and then on the ground. After the pipeline is backfilled, secondary excavation should be avoided as far as possible. After the pipeline is buried, it should be marked on the ground. 2 The construction of water supply and drainage pipelines shall comply with the relevant provisions of the current national standard "Code for Construction and Acceptance of Water Supply and Drainage Pipeline Engineering" GB 50268. 4.4.5 The rainwater wellhead should be constructed according to the design requirements. If the design documents are not clear, the site construction should be consistent with the site elevation; the water collection well should generally be 20mm-50mm lower than the site, and the local site slope around the stormwater outlet should be controlled at 1%. ~3%; water filtration measures should be taken around the water collection outlet during construction. 4.5 Buildings (structures) 4.5.1 The buildings (structures) of the photovoltaic power station shall include complex buildings, power distribution rooms, booster stations, inverter cells, gates and walls, etc. 4.5.2 The construction of concrete for buildings (structures) shall comply with the relevant provisions of the current national standard "Construction Quality Acceptance Code for Concrete Structure Engineering" GB 50204, and the concrete strength inspection shall comply with the current national standard "Concrete Strength Inspection and Evaluation Standard" GB/T The relevant provisions of 50107. 4.5.3 The construction of masonry works shall comply with the relevant provisions of the current national standard "Code for Acceptance of Construction Quality of Masonry Structure Engineering" GB 50203. 4.5.4 The construction of the roofing project shall comply with the relevant provisions of the current national standard "Code for Quality Acceptance of Roofing Projects" GB 50207. 4.5.5 The construction of ground works shall comply with the relevant provisions of the current national standard "Code for Acceptance of Construction Quality of Building Ground Works" GB 50209. 4.5.6 The construction of building decoration works shall comply with the relevant provisions of the current national standard "Code for Quality Acceptance of Building Decoration and Decoration Works" GB 50210. 4.5.7 The construction of ventilation and air-conditioning projects shall comply with the relevant provisions of the current national standard "Code for Acceptance of Construction Quality of Ventilation and Air-conditioning Projects" GB 50243. 4.5.8 The construction of the steel structure project shall comply with the relevant provisions of the current national standard "Code for Construction Quality Acceptance of Steel Structure Engineering" GB 50205.5 Installation works5.1 General provisions 5.1.1 The transportation and storage of equipment shall meet the following requirements. 1 In the process of hoisting and transportation, safety measures such as anti-overturning, anti-vibration and damage to the protective surface should be taken. If necessary, the installation equipment and vulnerable components can be removed and packaged separately for transportation. When the product has special requirements, it should still comply with the provisions of the product technical documents. 2 After the equipment arrives at the site, the following checks should be done. 1) The packaging and sealing should be good. 2) Open the box for inspection, the model and specifications should meet the design requirements, and the accessories and spare parts should be complete. 3) The technical documents of the product should be complete. 4) Visual inspection should be intact. 3 The equipment should be stored indoors or in a dry place that can avoid rain and snow, and protective measures should be taken. 4 During the storage period, it should be checked regularly and the protection work should be done well. 5.1.2 Installers should be trained in relevant installation knowledge. 5.1.3 The handover and acceptance during construction of photovoltaic power stations shall meet the following requirements. 1 The intermediate transfer project of photovoltaic power station construction may include. step-up station foundation, high and low voltage panel foundation, inverter foundation, power distribution room, support foundation......Tips & Frequently Asked Questions:Question 1: How long will the true-PDF of GB 50794-2012_English be delivered?Answer: Upon your order, we will start to translate GB 50794-2012_English as soon as possible, and keep you informed of the progress. 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