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According to the requirements of Document JIANBIAO [2014] No.189 issued by the Ministry of Housing and Urban-Rural Development of the People's Republic of China - Notice on printing and distributing the development and revision plan on engineering construction standards and codes in 2015, the drafting group of standard complied this standard through the extensive investigation and study, careful summarization of practical experience and reference to relevant international and foreign advanced standards and on the basis of widely soliciting for opinions.
The main technical contents of this standard are: 1. General provisions; 2. Terms and symbols; 3. Basic requirements; 4. Engineering design; 5. Construction and acceptance; 6. Operation and maintenance.
The Ministry of Housing and Urban-Rural Development of the People's Republic of China is in charge of the administration of this standard, and Shanghai Municipal Engineering Design Institute (Group) Co., Ltd. is responsible for the explanation of specific technical contents. During the process of implementing this standard, you are kindly requested to send your opinions and advice (if any) to Shanghai Municipal Engineering Design Institute (Group) Co., Ltd. (Address: No.901, North Zhongshan No.2 Road, Zhongshan District, Shanghai, 200092, China).
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Contents
1 General provisions 1
2 Terms and symbols 2
2.1 Terms 2
2.2 Symbols 2
3 Basic requirements 3
4 Engineering design 4
4.1 General requirements 4
4.2 Site selection and general layout 5
4.3 Process design 6
4.4 Structural design 11
4.5 Electrical and control instruments 13
4.6 Design of auxiliary facilities 16
5 Construction and acceptance 18
5.1 Construction 18
5.2 Acceptance 21
6 Operation and maintenance 23
6.1 Operation 23
6.2 Maintenance 25
Explanation of wording in this standard 27
List of quoted standards 28
1 General provisions
1.0.1 This standard is formulated with a view to making the integrated prefabricated pumping station engineering safe, reliable, advanced in technology, economical and reasonable, and convenient in operation and management.
1.0.2 This standard is applicable to the design, construction, acceptance, operation and maintenance of integrated prefabricated pumping station engineering in the constructed, extended and renovated urban water supply and drainage engineering.
1.0.3 In addition to this standard, the design, construction, acceptance, operation and maintenance of integrated prefabricated pumping station engineering shall also comply with those stipulated in the current relevant standards of the nation.
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2 Terms and symbols
2.1 Terms
2.1.1 integrated prefabricated pumping station
pumping station of which the shaft, water pump, screen, pipeline, valve, control system, ventilation system and other main components are integrated into a whole in the factory and which is pre-installed and tested before leaving the factory and then is transported to the site for installation
2.1.2 wet well integrated prefabricated pumping station
integrated prefabricated pumping station of which the water pump and inlet well are integrated in the same shaft, with the water pump installed in a wet mode
2.1.3 dry well integrated prefabricated pumping station
integrated prefabricated pumping station which consists of an independent dry area or integrates the dry area and wet area in the same shaft, with the water pump installed in a dry mode
2.1.4 basket screen
basket screen which is equipped with guide rods and lifting chains and is automatically coupled to the water inlet pipeline
2.1.5 grinder
screen which is composed of an independent cutting mechanism or the cutting machine combined with the rotating screen
2.2 Symbols
F——the total buoyancy of the main body, the backfilled soil above the baseplate and the baseplate of integrated prefabricated pumping station;
KS——the design resistance coefficient of stability;
QP——the design flow of the largest pump in the integrated prefabricated pumping station;
VEff——the effective volume of sump of integrated prefabricated pumping station;
W——the total gravity of the main body, the backfilled soil above the baseplate and the baseplate of integrated prefabricated pumping station;
Zmax——the maximum number of starts and stops of water pump per hour.
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3 Basic requirements
3.0.1 Integrated prefabricated pumping stations may be divided into water supply integrated prefabricated pumping stations and drainage integrated prefabricated pumping stations depending on their uses, and into dry well integrated prefabricated pumping stations and wet well integrated prefabricated pumping stations depending on their installation forms.
3.0.2 The main body of integrated prefabricated pumping station shall be composed of shaft and internal facilities. It shall be pre-installed and tested in the factory in accordance with the principles of safety and reliability, and site installation time and minimum workload.
3.0.3 As for the integrated prefabricated pumping station, the ambient temperature at the use site of its main body should not be lower than -20℃, that surrounding the use site of its control cabinet should not be lower than -10℃~40℃, and the relative humidity should be 25%~85%. When the integrated prefabricated pumping station is set beyond the above environmental conditions, proper anti-freezing, heat dissipation and ventilation measures shall be taken.
3.0.4 The conveying medium of integrated prefabricated pumping station shall meet the following requirements:
1 The temperature shall be 0℃~40℃;
2 The pH value shall be 4~10;
3 The maximum particle diameter in the conveying medium of the drainage pump shall be smaller than the diameter of the selected pump.
3.0.5 When the conveying medium cannot meet the requirements of 3.0.4 hereof, corresponding measures shall be taken.
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4 Engineering design
4.1 General requirements
4.1.1 The material of the main body of integrated prefabricated pumping station shall meet the following requirements:
1 The shaft is made of lightweight, high-strength and corrosion-resistant materials such as glass fiber reinforced plastic or high-density polyethylene;
2 The pump overflow parts, pipelines and other parts in direct contact with the conveying medium of the integrated prefabricated pumping station for conveying domestic drinking water shall meet the relevant requirements of the current national standard GB/T 17219 Standard for safety evaluation of equipment and protective materials in drinking water system;
3 The internal pipelines and supporting accessories of the drainage integrated prefabricated pumping station should be made of stainless steel, polyethylene or other corrosion-resistant materials.
4.1.2 The top cover design of the main body of integrated prefabricated pumping station shall meet the following requirements:
1 The design elevation of the top cover shall meet the flood control requirements, and the bearing capacity of the top cover shall be calculated according to the actual stress conditions, taking into account wind load, snow load, flooding load, temperature load and other variable loads;
2 When the integrated prefabricated pumping station is set in the green belt, the elevation and layout of the top cover shall be considered in combination with the requirements of landscape, greening and other disciplines or those of sponge city construction;
3 When the integrated prefabricated pumping station is set in roads, squares and other areas, its top cover, access cover and base shall meet the requirements of bearing capacity and stability corresponding to the road level, and the top cover and access cover shall be equal to the pavement and proper waterproof measures shall be taken.
4.1.3 For wet well integrated prefabricated pumping station with a diameter greater than 3m, a deflector shall be set at its water inlet
4.1.4 In the wet well integrated prefabricated pumping station, the pump pit shall be of optimized flow design.
4.1.5 The wet well drainage integrated prefabricated pumping station should have the functions of automatically emptying the sump regularly and preventing the water pump from sticking.
4.2 Site selection and general layout
4.2.1 The integrated prefabricated pumping station engineering shall be planned uniformly. If there are long-term planning requirements, long-term interfaces shall be reserved in the near-term engineering.
4.2.2 The integrated prefabricated pumping station should be located at the natural foundation with solid rock and soil and good impermeability. Where the natural foundation is unsatisfactory, corresponding foundation treatment measures shall be taken or artificial foundation shall be adopted.
4.2.3 The distance between the integrated prefabricated pumping station and residential buildings and public buildings shall be reasonably determined according to the requirements of planning, fire protection and environmental protection departments, and the integrated prefabricated pumping station shall be in harmony with its surroundings.
4.2.4 The site of water supply integrated prefabricated pumping station and drainage integrated prefabricated pumping station shall meet the following requirements:
1 The flood control standard of water intake integrated prefabricated pumping station shall not be inferior to the urban flood control standard, and the design flood return period shall not be less than 100 years. The site of water intake integrated prefabricated pumping station shall be located in the river section with good water quality, close to the mainstream, stable riverbed, good geological conditions, upstream of industrial and mining areas and convenient water intake conditions.
2 The flood control standard of water supply and pressurization integrated prefabricated pumping station shall not be inferior to the urban flood control standard, and an appropriate safety margin shall be reserved. Site selection shall conform to the overall urban planning and relevant special planning, and shall take into account factors such as system layout, flood threat, wastewater discharge conditions, engineering geological conditions, sanitary environment, as well as construction, operation and maintenance comprehensively.
3 The site of drainage integrated prefabricated pumping station shall meet the requirements of urban drainage and waterlogging prevention, and shall be determined upon technical and economic comparison according to the requirements of drainage design.
1 General provisions
2 Terms and symbols
2.1 Terms
2.2 Symbols
3 Basic requirements
4 Engineering design
4.1 General requirements
4.2 Site selection and general layout
4.3 Process design
4.4 Structural design
4.5 Electrical and control instruments
4.6 Design of auxiliary facilities
5 Construction and acceptance
5.1 Construction
5.2 Acceptance
6 Operation and maintenance
6.1 Operation
6.2 Maintenance
Explanation of wording in this standard
List of quoted standards
