At last, all the diversion tunnels were excavated by drilling and blasting method. These optimizations, which increase the direct investment of the project, play a very important role in ensuring the safety and progress of the project, making it possible to generate electricity a year in advance.
The diversion tunnels at Jinping II hydropower station are the largest and the most complicated underground projects so far in the world. The design scheme has been modified and optimized several times, and the construction method and layout have been revised during the tunnel excavation.
In different construction stages in terms of different geological conditions, the construction scheme of the diversion tunnels has been dynamically modified. At the first stage of construction, the drilling and blasting method was adopted to excavate the diversion tunnels. Then, TBM was used in combination with drilling and blasting method.
The complex hydrogeological conditions, i.e. the high water pressure, stable water supply, and high in-situ stress over 70 MPa, made the tunnel construction and structure design difficult. The diversion tunnels at Jinping II hydropower station are the largest and the most complicated underground projects so far in the world.
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This hydropower station is a low-gate, long-tunnel, and large-capacity diversion-type power station with a total installed capacity of 4800 MW. The total excavation volume of the …
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Taking the diversion and spillway tunnel of a pumped storage power station under high in-situ stress as the research object, using finite difference method, the model of the …
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The Jinping II hydropower station in China possesses the world’s largest karst diversion tunnel group and discharged massive groundwater during the construction period.
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Pumped-storage power stations have a large number of diversion tunnels, long tunnel lines and frequent changes in the external water level. Based on ansys for simulation calculations, first …
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This academic study conducts a comprehensive stability evaluation of the structurally critical intake diversion tunnel system at the Jinshuitan Pumped Storage Power Station facility …
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Through optimized scheme and updated construction scheme, the excavation of diversion tunnel #1 was successfully completed in June, 2011. This paper summarizes the key …
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ABSTRACT This academic study conducts a comprehensive stability evaluation of the structurally critical intake diversion tunnel system at the Jinshuitan Pumped Storage Power Station facility …
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The diversion system of Fukang pumped storage power Station in Xinjiang adopts the arrangement of "one hole and two units" and the combination of inclined shaft and hori …
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On September 12th, Chuosijia Hydroelectric Power Station, operated by Sichuan Power Generation Co., LTD under China Energyachieved a breakthrough in the excavation …
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Coordinating the operation of hydropower, wind, and solar energy improves renewable energy utilization but poses challenges in cascade serial diversion-type hydropower …
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The Jinping II hydropower station in China possesses the world’s largest karst diversion tunnel group and discharged massive groundwater during …
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