Sensitivity Analysis and Parameter Optimization of Hydraulic Transition Process of Deep Tunnel Water Pipeline
Based on the basic theory of unsteady flow in the pressurized pipeline,a one-dimensional mathematical model of the hydraulic transition process of the complex system"reservoir-shaft-water delivery tunnel-pumping station-pressure stabilizer tank"was established.The impacts of pumped station location,deep tunnel diameter,shaft in the middle of the tunnel,and pump number on the hydraulic transition process were studied.The results show that the back position of the pump house can reduce the pressure along the way,and the water level fluctuationis small,which is con-ducive to protecting the water hammer and reducing the difficulty of management.Increasing the diameter of the water pipeline has little effect on the water hammer,but it can reduce the head loss along the way,effectively reduce the surge height of the upstream shaft when the pump is stopped accidentally,and increase the safety of the system operation.The design of the middle shaft as a surge well can reduce the surge level of the upper shaft in the event of an emergency pum-ping shutdown,but will increase the surge level of the upper shaft when the pump is started.In the project of water in-take pumping stations,it is recommended to choose the scheme with more pumps under the premise that the water level fluctuation caused by the pump's accident stop is not large.The research can provide a scientific basis for the engineering layout of the long-distance deep tunnel water pipeline system.
deep tunnel water pipelinehydraulic transition processsensitivity analysisparameter optimization
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维普
