Standard for pumping station design
1 General provisions
1.0.1 This standard is formulated with a view to unifying the standards for pumping station design for safety, reliability, advanced technology, economic rationalization and convenience in operation and management.
1.0.2 This standard is applicable to the design of newly-built, extended, renewed or renovated pumping stations for water supply, irrigation and drainage.
1.0.3 Basic data shall be widely collected and sorted out for pumping station design. The basic data shall be analyzed, accurate and reliable, and meet the design requirements.
1.0.4 Pumping station shall be designed under the principle of energy conservation and consumption reduction, based on practical experience, necessary scientific experiments and new technologies, new materials, new equipment and new processes.
1.0.5 Seismic design shall be made for pumping stations with a design seismic peak ground acceleration of larger than or equal to 0.10 g. For pumping stations with a design peak ground acceleration is 0.05 g, seismic calculation may not be carried out, but seismic measures shall remain.
1.0.6 In addition to this standard, the design of pumping station shall also meet the requirements of the current relevant standards of the nation.
2 Terms
2.0.1
main pump house
structure equipped with main pump unit and its auxiliary equipment, designed for operation, installation and maintenance, consisting of machine hall and erection bay
2.0.2
auxiliary house
house equipped with power distribution and transformation equipment, operating and control equipment, auxiliary equipment, communication equipment, etc., designed for operation, maintenance, test, duty and management
2.0.3
machine hall
occupancy in the main pump house where the pump unit and its auxiliary equipment are arranged
2.0.4
erection bay
occupancy for assembling, overhauling, loading and unloading of pump unit and other electromechanical equipment in the main pump house
2.0.5
inlet passage
water passage that connects the suction sump with the suction inlet of the pump for improving the pump suction conditions
2.0.6
outlet passage
water passage that connects the outlet of the pump body (guide vane body) with the outlet sump
2.0.7
pump system
combined pump (excluding power machine and transmission equipment) and inlet and outlet passages (or pipeline)
2.0.8
pump system efficiency
product of the efficiency of passage (or pipeline) and the efficiency of pump section
2.0.9
shaft pumping station
pumping station equipped with pumping device in the shaft machine hall
2.0.10
cable car pumping station
pumping station equipped with pumping device in the cable car which can move along the slope track
2.0.11
floating pumping station
pumping station equipped with pumping device on the pump boat, floating with the change of water level
2.0.12
pumping station equipped with submersible pump
pumping station equipped with submersible pump as main pumping equipment; the pumping station with fixed installation relationship between submersible pump and hydraulic structures is a fixed pumping station equipped with submersible pump; the pumping station without fixed installation relationship between submersible pump and hydraulic structures is a mobile pumping station equipped with submersible pump; the pumping station for two-way pumping by changing the phase sequence of submersible motor or changing the installation direction of submersible pump is a two-way pumping station equipped with submersible pump
2.0.13
submerged pumping station
fixed pumping station equipped with pump house operating submersibly at a high water level
3 Grade and standard of pumping station
3.0.1 The grade of pumping station projects and structures shall meet the requirements of the relevant provisions of the current national standard GB 50201 Standard for flood control and SL 252 Standard for rank classification and flood protection criteria of water and hydropower projects.
3.0.2 The flood (tide) control standards for structures of pumping station shall meet the requirements of the current national standard GB 50201 Standard for flood control and SL 252 Standard for rank classification and flood protection criteria of water and hydropower projects. For pumping station crossing the dam, its flood (tide) control standards shall not be lower than those for the dam.
3.0.3 The requirements for rational service life and durability of pumping station shall meet the requirements of the current industry standard SL 654 Code for rational service life and durability design of water resources and hydropower projects.
4 Main design parameters of pumping station
4.1 Design discharge
4.1.1 The design discharge of irrigation pumping station shall be determined according to the calculation results of water balance in irrigation area and the maximum average intake flow rate in the period required to meet the irrigation design guarantee rate.
4.1.2 The design discharge of drainage pumping station shall be calculated and determined according to drainage requirements. The calculation shall meet the following requirements:
1 For pumping stations for direct drainage from waterlogged areas through drainage watercourse, the design discharge should be determined by runoff generation and sinkflow method, empirical equation method for drainage modulus, average elimination method, water balance method and hydraulic model method for river network;
2 For pumping stations for drainage from waterlogged storage areas, the regulation and storage calculation shall be carried out according to the design rainstorm, the inflow hydrograph of the corresponding waterlogged storage areas and the design drainage duration, and the maximum outflow flow rate shall be taken as the design discharge;
3 For pumping stations for drainage from both waterlogged areas and waterlogged storage areas, it may drain first from waterlogged areas, and then from waterlogged storage areas. Calculate the discharge for surface drainage by the methods in Paragraphs 1 and 2 of this subclause, and take the larger one as the design discharge;
4 For drainage pumping stations combined with gate station, the design discharge shall be determined under the principle of utilizing the drainage gate for gravity flow and rushing drainage and pumping the remaining water by drainage pumping station;
5 For waterlogged areas with drainage requirements, the total design discharge is the sum of design discharge for surface drainage and design discharge for subsurface drainage. The design discharge for subsurface drainage may be calculated and determined by drainage modulus and drainage area;
6 The design discharge of urban drainage pumping station may be calculated and determined by the design comprehensive domestic sewage, industrial wastewater and rainwater.
4.1.3 The design discharge of industrial and urban water supply pumping stations shall be comprehensively determined according to the design level year, design guarantee rate, water consumption of water supply objects, hourly variation coefficient, daily variation coefficient and regulation and storage capacity of urban water supply.
4.2 Characteristic water level
4.2.1 The water level of the suction sump of irrigation pumping station shall meet the following requirements:
1 The water level of flood (tidal) control shall be determined according to the flood (tidal) control standards specified in Subclause 3.0.2 in this standard.
2 In the intake from rivers or lakes, the design operating water level shall be the average daily or ten-day average water level that meets the design irrigation guarantee rate during the irrigation period over the years; in the intake from reservoirs, the design operating water level shall be determined by analyzing the irrigation guarantee rate and reservoir regulation and storage performance; in the intake from channel, the design operating water level shall be the water level when the water passes through the channel at the design discharge, with the influence of channel operating water level dropping; in the intake from tidal reach, the design operating water level shall be the average low tide level in irrigation period that meets the requirement of design irrigation guarantee rate.
3 In the intake from rivers or lakes, the maximum operating water level shall be the average daily water level of up to a five to ten-year flood in return period; in the intake from reservoirs, the maximum operating water level shall be demonstrated and determined by the reservoir regulation and storage performance; in the intake from channel, the maximum operating water level shall be the water level when the water passes through the channel at an increasing discharge; in the intake from tidal reach, the maximum operating water level shall be the maximum average daily tide level of up to a five to ten-year flood in return period.
4 In the intake from rivers, lakes or reservoirs, the minimum operating water level shall be the minimum average daily water level with a water source guarantee rate of 95% ~ 97% during irrigation period over the years; in the intake from channel, the minimum operating water level shall be the water level corresponding to the minimum flow rate of the channel; in the intake from tidal reach, the minimum operating water level shall be the minimum daily tidal level with a water source guarantee rate of 95% ~ 97% in the irrigation period over the years.
5 In the intake from rivers, lakes, reservoirs or tidal reach, the average water level shall be the average daily water (tidal) level during irrigation period over the years; in the intake from channel, the average water level shall be the water level when the water passes through the channel at the average flow rate.
6 For these water levels, hydraulic loss from the water intake to the suction sump shall be deducted. In the intake from a watercourse with unstable riverbed, the influence of riverbed change shall be considered before taking the water level as the corresponding characteristic water level of the suction sump. The influence of ice cover (including flowing ice) on hydraulic loss shall be considered in the intake under ice cover in cold areas.
4.2.2 The water level of the outlet sump of irrigation pumping station shall meet the following requirements:
1 When the outlet sump is connected with the conveyance watercourse, the maximum water level shall be the higher one between the flood control water level and the maximum operating water level of the conveyance watercourse; when the outlet sump is connected with the water conveyance channel, the maximum water level shall be the water level corresponding to the maximum flow rate of the pumping station. For pumping stations taking water from rivers with dense sediment, the influence of sediment in water conveyance channel on water level shall be considered for the maximum water level.
Foreword ii
1 General provisions
2 Terms
3 Grade and standard of pumping station
4 Main design parameters of pumping station
4.1 Design discharge
4.2 Characteristic water level
4.3 Characteristic head
5 Site selection
5.1 General requirements
5.2 Site selection for pumping station
6 General layout
6.1 General requirements
6.2 Layout pattern of pumping station
7 Pump house
7.1 Layout of pump house
7.2 Design of seepage control and drainage
7.3 Stability analysis
7.4 Calculation and treatment of foundation
7.5 Calculation of main structures
7.6 Seismic design of structures and measures
8 Inlet and outlet structures
8.1 Approach channel
8.2 Forebay and suction sump
8.3 Outlet conduit
8.4 Outlet sump and pressure tank
9 Pumping station of other types
9.1 General requirements
9.2 Shaft pumping station
9.3 Cable car pumping station
9.4 Floating pumping station
9.5 Pumping station equipped with submersible pump
9.6 Submerged pumping station
10 Hydraulic machinery and auxiliary equipment
10.1 Main pump
10.2 Inlet and outlet passages
10.3 Suction pipe and discharge pipe within pump house
10.4 Transient process and protection against its damage
10.5 Vacuum and priming system
10.6 Drainage system
10.7 Water supply system
10.8 Compressed air system
10.9 Oil supply system
10.10 Hydraulic monitoring system
10.11 Hoisting equipment
10.12 Heating, ventilation and air-conditioning
10.13 Layout of hydraulic machinery
10.14 Machinery repairing equipment
11 Electrics
11.1 Power supply system
11.2 Main electrical connection
11.3 Selection of main motor
11.4 Selection of main transformer
11.5 Selection of high-voltage distribution device
11.6 Reactive power compensation
11.7 Service power
11.8 Layout of key indoor and outdoor electrical equipment and cable laying
11.9 Fire-fighting of electrical equipment
11.10 Over voltage protection and earthing device
11.11 Lighting
11.12 Relaying protection and security automatic equipment
11.13 Supervisory control and data acquisition
11.14 Video surveillance system
11.15 Information management system
11.16 Metering device
11.17 Operating power supply
11.18 Communication
11.19 Electrical test equipment
11.20 Electrical energy saving
12 Gate, trash rack and hoisting equipment
12.1 General requirements
12.2 Trash rack and trashraking equipment
12.3 Flap gate and quick stop gate
12.4 Hoisting equipment
13 Renewal and renovation of pumping station
13.1 General requirements
13.2 Structures of pumping station
13.3 Electromechanical equipment and metallic structure
14 Safety monitoring
Appendix A Parameters for stability analysis of pumping stations
Appendix B Approximate calculation of closing speed and impact force of quick stop gate
Explanation of wording in this standard
List of quoted standards
Standard for pumping station design
1 General provisions
1.0.1 This standard is formulated with a view to unifying the standards for pumping station design for safety, reliability, advanced technology, economic rationalization and convenience in operation and management.
1.0.2 This standard is applicable to the design of newly-built, extended, renewed or renovated pumping stations for water supply, irrigation and drainage.
1.0.3 Basic data shall be widely collected and sorted out for pumping station design. The basic data shall be analyzed, accurate and reliable, and meet the design requirements.
1.0.4 Pumping station shall be designed under the principle of energy conservation and consumption reduction, based on practical experience, necessary scientific experiments and new technologies, new materials, new equipment and new processes.
1.0.5 Seismic design shall be made for pumping stations with a design seismic peak ground acceleration of larger than or equal to 0.10 g. For pumping stations with a design peak ground acceleration is 0.05 g, seismic calculation may not be carried out, but seismic measures shall remain.
1.0.6 In addition to this standard, the design of pumping station shall also meet the requirements of the current relevant standards of the nation.
2 Terms
2.0.1
main pump house
structure equipped with main pump unit and its auxiliary equipment, designed for operation, installation and maintenance, consisting of machine hall and erection bay
2.0.2
auxiliary house
house equipped with power distribution and transformation equipment, operating and control equipment, auxiliary equipment, communication equipment, etc., designed for operation, maintenance, test, duty and management
2.0.3
machine hall
occupancy in the main pump house where the pump unit and its auxiliary equipment are arranged
2.0.4
erection bay
occupancy for assembling, overhauling, loading and unloading of pump unit and other electromechanical equipment in the main pump house
2.0.5
inlet passage
water passage that connects the suction sump with the suction inlet of the pump for improving the pump suction conditions
2.0.6
outlet passage
water passage that connects the outlet of the pump body (guide vane body) with the outlet sump
2.0.7
pump system
combined pump (excluding power machine and transmission equipment) and inlet and outlet passages (or pipeline)
2.0.8
pump system efficiency
product of the efficiency of passage (or pipeline) and the efficiency of pump section
2.0.9
shaft pumping station
pumping station equipped with pumping device in the shaft machine hall
2.0.10
cable car pumping station
pumping station equipped with pumping device in the cable car which can move along the slope track
2.0.11
floating pumping station
pumping station equipped with pumping device on the pump boat, floating with the change of water level
2.0.12
pumping station equipped with submersible pump
pumping station equipped with submersible pump as main pumping equipment; the pumping station with fixed installation relationship between submersible pump and hydraulic structures is a fixed pumping station equipped with submersible pump; the pumping station without fixed installation relationship between submersible pump and hydraulic structures is a mobile pumping station equipped with submersible pump; the pumping station for two-way pumping by changing the phase sequence of submersible motor or changing the installation direction of submersible pump is a two-way pumping station equipped with submersible pump
2.0.13
submerged pumping station
fixed pumping station equipped with pump house operating submersibly at a high water level
3 Grade and standard of pumping station
3.0.1 The grade of pumping station projects and structures shall meet the requirements of the relevant provisions of the current national standard GB 50201 Standard for flood control and SL 252 Standard for rank classification and flood protection criteria of water and hydropower projects.
3.0.2 The flood (tide) control standards for structures of pumping station shall meet the requirements of the current national standard GB 50201 Standard for flood control and SL 252 Standard for rank classification and flood protection criteria of water and hydropower projects. For pumping station crossing the dam, its flood (tide) control standards shall not be lower than those for the dam.
3.0.3 The requirements for rational service life and durability of pumping station shall meet the requirements of the current industry standard SL 654 Code for rational service life and durability design of water resources and hydropower projects.
4 Main design parameters of pumping station
4.1 Design discharge
4.1.1 The design discharge of irrigation pumping station shall be determined according to the calculation results of water balance in irrigation area and the maximum average intake flow rate in the period required to meet the irrigation design guarantee rate.
4.1.2 The design discharge of drainage pumping station shall be calculated and determined according to drainage requirements. The calculation shall meet the following requirements:
1 For pumping stations for direct drainage from waterlogged areas through drainage watercourse, the design discharge should be determined by runoff generation and sinkflow method, empirical equation method for drainage modulus, average elimination method, water balance method and hydraulic model method for river network;
2 For pumping stations for drainage from waterlogged storage areas, the regulation and storage calculation shall be carried out according to the design rainstorm, the inflow hydrograph of the corresponding waterlogged storage areas and the design drainage duration, and the maximum outflow flow rate shall be taken as the design discharge;
3 For pumping stations for drainage from both waterlogged areas and waterlogged storage areas, it may drain first from waterlogged areas, and then from waterlogged storage areas. Calculate the discharge for surface drainage by the methods in Paragraphs 1 and 2 of this subclause, and take the larger one as the design discharge;
4 For drainage pumping stations combined with gate station, the design discharge shall be determined under the principle of utilizing the drainage gate for gravity flow and rushing drainage and pumping the remaining water by drainage pumping station;
5 For waterlogged areas with drainage requirements, the total design discharge is the sum of design discharge for surface drainage and design discharge for subsurface drainage. The design discharge for subsurface drainage may be calculated and determined by drainage modulus and drainage area;
6 The design discharge of urban drainage pumping station may be calculated and determined by the design comprehensive domestic sewage, industrial wastewater and rainwater.
4.1.3 The design discharge of industrial and urban water supply pumping stations shall be comprehensively determined according to the design level year, design guarantee rate, water consumption of water supply objects, hourly variation coefficient, daily variation coefficient and regulation and storage capacity of urban water supply.
4.2 Characteristic water level
4.2.1 The water level of the suction sump of irrigation pumping station shall meet the following requirements:
1 The water level of flood (tidal) control shall be determined according to the flood (tidal) control standards specified in Subclause 3.0.2 in this standard.
2 In the intake from rivers or lakes, the design operating water level shall be the average daily or ten-day average water level that meets the design irrigation guarantee rate during the irrigation period over the years; in the intake from reservoirs, the design operating water level shall be determined by analyzing the irrigation guarantee rate and reservoir regulation and storage performance; in the intake from channel, the design operating water level shall be the water level when the water passes through the channel at the design discharge, with the influence of channel operating water level dropping; in the intake from tidal reach, the design operating water level shall be the average low tide level in irrigation period that meets the requirement of design irrigation guarantee rate.
3 In the intake from rivers or lakes, the maximum operating water level shall be the average daily water level of up to a five to ten-year flood in return period; in the intake from reservoirs, the maximum operating water level shall be demonstrated and determined by the reservoir regulation and storage performance; in the intake from channel, the maximum operating water level shall be the water level when the water passes through the channel at an increasing discharge; in the intake from tidal reach, the maximum operating water level shall be the maximum average daily tide level of up to a five to ten-year flood in return period.
4 In the intake from rivers, lakes or reservoirs, the minimum operating water level shall be the minimum average daily water level with a water source guarantee rate of 95% ~ 97% during irrigation period over the years; in the intake from channel, the minimum operating water level shall be the water level corresponding to the minimum flow rate of the channel; in the intake from tidal reach, the minimum operating water level shall be the minimum daily tidal level with a water source guarantee rate of 95% ~ 97% in the irrigation period over the years.
5 In the intake from rivers, lakes, reservoirs or tidal reach, the average water level shall be the average daily water (tidal) level during irrigation period over the years; in the intake from channel, the average water level shall be the water level when the water passes through the channel at the average flow rate.
6 For these water levels, hydraulic loss from the water intake to the suction sump shall be deducted. In the intake from a watercourse with unstable riverbed, the influence of riverbed change shall be considered before taking the water level as the corresponding characteristic water level of the suction sump. The influence of ice cover (including flowing ice) on hydraulic loss shall be considered in the intake under ice cover in cold areas.
4.2.2 The water level of the outlet sump of irrigation pumping station shall meet the following requirements:
1 When the outlet sump is connected with the conveyance watercourse, the maximum water level shall be the higher one between the flood control water level and the maximum operating water level of the conveyance watercourse; when the outlet sump is connected with the water conveyance channel, the maximum water level shall be the water level corresponding to the maximum flow rate of the pumping station. For pumping stations taking water from rivers with dense sediment, the influence of sediment in water conveyance channel on water level shall be considered for the maximum water level.
Contents of GB 50265-2022
Foreword ii
1 General provisions
2 Terms
3 Grade and standard of pumping station
4 Main design parameters of pumping station
4.1 Design discharge
4.2 Characteristic water level
4.3 Characteristic head
5 Site selection
5.1 General requirements
5.2 Site selection for pumping station
6 General layout
6.1 General requirements
6.2 Layout pattern of pumping station
7 Pump house
7.1 Layout of pump house
7.2 Design of seepage control and drainage
7.3 Stability analysis
7.4 Calculation and treatment of foundation
7.5 Calculation of main structures
7.6 Seismic design of structures and measures
8 Inlet and outlet structures
8.1 Approach channel
8.2 Forebay and suction sump
8.3 Outlet conduit
8.4 Outlet sump and pressure tank
9 Pumping station of other types
9.1 General requirements
9.2 Shaft pumping station
9.3 Cable car pumping station
9.4 Floating pumping station
9.5 Pumping station equipped with submersible pump
9.6 Submerged pumping station
10 Hydraulic machinery and auxiliary equipment
10.1 Main pump
10.2 Inlet and outlet passages
10.3 Suction pipe and discharge pipe within pump house
10.4 Transient process and protection against its damage
10.5 Vacuum and priming system
10.6 Drainage system
10.7 Water supply system
10.8 Compressed air system
10.9 Oil supply system
10.10 Hydraulic monitoring system
10.11 Hoisting equipment
10.12 Heating, ventilation and air-conditioning
10.13 Layout of hydraulic machinery
10.14 Machinery repairing equipment
11 Electrics
11.1 Power supply system
11.2 Main electrical connection
11.3 Selection of main motor
11.4 Selection of main transformer
11.5 Selection of high-voltage distribution device
11.6 Reactive power compensation
11.7 Service power
11.8 Layout of key indoor and outdoor electrical equipment and cable laying
11.9 Fire-fighting of electrical equipment
11.10 Over voltage protection and earthing device
11.11 Lighting
11.12 Relaying protection and security automatic equipment
11.13 Supervisory control and data acquisition
11.14 Video surveillance system
11.15 Information management system
11.16 Metering device
11.17 Operating power supply
11.18 Communication
11.19 Electrical test equipment
11.20 Electrical energy saving
12 Gate, trash rack and hoisting equipment
12.1 General requirements
12.2 Trash rack and trashraking equipment
12.3 Flap gate and quick stop gate
12.4 Hoisting equipment
13 Renewal and renovation of pumping station
13.1 General requirements
13.2 Structures of pumping station
13.3 Electromechanical equipment and metallic structure
14 Safety monitoring
Appendix A Parameters for stability analysis of pumping stations
Appendix B Approximate calculation of closing speed and impact force of quick stop gate
Explanation of wording in this standard
List of quoted standards
