on March 25, the pilot hole drilling and reverse reaming operations of the new source Zhejiang pan an pumped storage power station of the national network were successfully completed, marking a breakthrough in the excavation of the exhaust shaft and the full penetration of the ventilation system of the power station.
this construction has carried out key technical optimization on the exhaust shaft structure, abandoned the original design of a single large shaft with a diameter of 6.8 meters, innovatively adopted two shaft structures with a diameter of 4.5 meters, and promoted the construction by relying on the advanced technology of one-time completion of anti-well drilling rig. Since the start of drilling, the project department has strictly followed the approved special construction plan, faced multiple challenges such as a well depth of 151 meters, complex rock geology and extremely high vertical accuracy requirements, scientifically deployed and carried out accurate construction. In order to ensure that the verticality of the drilling reaches the high standard requirements, the project department accurately grasped the drilling posture through real-time observation and monitoring, dynamically optimized and adjusted the construction process in combination with the WOB parameters, and realized efficient coordinated command relying on the visual communication linkage, with the whole process safety alert to build a solid construction safety defense line, to ensure that the project quality and safety standards, fully demonstrates the five hydropower bureau in the complex geological conditions in the field of deep shaft construction of the superb professional technology and management capabilities.
The smooth connection of the exhaust shaft has laid a solid foundation for the subsequent construction of the power station, and also reflects the hard-core strength of the Fifth Hydropower Bureau in terms of engineering construction process innovation and safety management upgrades. Next, the project department will continue Adhering to the concept of "safety first, quality first", we will steadily advance the construction of subsequent projects.
