Abstract
The diversion system of a pumped-storage power station has a high water head, and its steel bifurcated pipe has a complex hydraulic structure. When the steel bifurcated pipe is assembled, a hydraulic pressure test needs to be performed to release the residual pressure inside the structure, so as to make sure the steel bifurcated pipe will be in good operation condition when the flow channel is filled with water. The bifurcated pipe is provided with deformation, stress and osmotic pressure monitoring items, which are able to meet the requirements for safe monitoring of the steel bifurcated pipe during operation. Based on the hydraulic pressure test of the steel bifurcated pipe of ➁ diversion system and the prototype monitoring data, it is unnecessary to perform hydraulic pressure test for the steel bifurcated pipe of ➀ diversion system. According to the prototype monitoring data feedback after filling ➀ diversion system with water for operation, the steel bifurcated pipe meets the design requirements, and it is in good operation condition, which shortens the construction period and saves cost for the project.
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