GUOHai-cheng.Design and Operational Safety Analysis of Extra-large Underground Water Intake Pumping Stations[J].China Water & Wastewater,2023,39(12):62-67.
Design and Operational Safety Analysis of Extra-large Underground Water Intake Pumping Stations
China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU]
volume:
第39卷
Number:
第12期
Page:
62-67
Column:
Date of publication:
2023-06-17
- Abstract:
- In view of the problems such as high construction difficulty, high operational risk and strict maintenance requirement of extra-large underground water intake pumping station, the relevant design principles were proposed from the perspectives of process requirements, intensive layout, pump setup, installation and maintenance and operation safety. The design points of an extra-large underground water intake pumping station pumping raw water from the Yangtze River in Nanjing were analyzed. The selection of water intake method should be combined with factors such as hydrological conditions, riverbed depth and construction difficulty to ensure the water quantity at the lowest water level and better hydraulic conditions. The selection and layout of the pumps should be based on the analysis of the working conditions, so as to ensure that the pump plan was satisfactory, economic and reasonable through the calculation of the specific rotate speed and overall consideration of the short-term and long-term water quantity changes. The layout of underground pumping house should adopt the form of superposition or co-construction as far as possible, reduce the footprint area of underground structures, optimize the layout and vertical space and reduce the depth of foundation pit excavation. In addition, the maintenance and transportation access shall be reasonably set based on the surrounding traffic conditions. From the perspective of safety protection, the underground pumping station should focus on flood prevention design, which prevented rainwater entering by raising the lifting hole flap and setting the rainproof louvers, and adding a quick-closing sluice gate to cut off the connection to the external water source. It is suggested to carry out special fire protection evaluation for the fire protection design of underground pumping stations, and appropriately expand the area of fire protection zone after the approval of fire protection examination and approval department, so as to reduce the impact of fire protection facilities on the spatial arrangement of the pumping house.
Last Update:
2023-06-17