on December 23, the water pressure test of two sets of water diversion steel bifurcation pipes of Anhui shitai pumped storage power station supervised by shitai supervision department of three gorges development company passed smoothly. The realization of this key node has laid a solid foundation for the subsequent installation of the pressure steel pipe.

The water diversion system of Shtai Pumping Storage Power Station adopts the water supply mode of two holes and four machines. The hydraulic test of steel bifurcated pipe adopts the method of the whole test after the two straight pipe sections of steel bifurcated pipe are connected. The test pressure rises from 0 MPa to the design test pressure of 5.8 MPa step by step, and the pressure is relieved to 0 MPa step by step after the maximum pressure is maintained for 30 minutes. Two complete pressure-increasing and pressure-decreasing cycles are completed in total. There is no leakage during the test. The monitoring data such as stress, strain, displacement and deformation of the steel bifurcation pipe meet the design and specification requirements.

The supervisor checks the diversion steel bifurcation pipe

To ensure that the test is foolproof, shitai Supervision Department organized all parties to complete the special examination of hydraulic pressure test scheme and hydraulic pressure monitoring scheme in advance. Before the test, the construction unit was organized to calibrate and debug the high-pressure pump, displacement sensor, data acquisition system and other equipment used in the test. During the test, the supervision personnel were on-site to supervise the whole process, and inspected the weld seam of steel bifurcation pipe and pressure pipeline to ensure the safe and orderly progress of the test.

the success of this hydraulic test is the result of the cooperation of the shitai pumping and storage power station project team, and is also a vivid embodiment of the shitai supervision department's implementation of the policy of "quality first, courage to take responsibility, overall management and pursuit of excellence. In the next step, the supervision department will continue to give full play to its technical advantages, strictly control the construction quality and safety, and provide a solid guarantee for the power station to be put into operation as scheduled.