Keywords: Tabela Hydroelectric Power Station Hydroelectric Power Station Hydroelectric Power Generation

Recently, the steel bifurcation pipe manufacturing and pre assembly of the fifth phase expansion project of the Tabara Hydropower Station in Pakistan, designed by China Electric Power Construction Chengdu Institute, have been successfully completed. The Tabera steel bifurcation is currently the world's largest crescent rib steel bifurcation, with a steel engineering quantity of nearly 7500 tons for the bifurcation group, exceeding the steel consumption of the Eiffel Tower.



Tabera Hydropower Station

Chengdu Institute is responsible for the design of gates, pressure steel pipes, and auxiliary equipment for the expansion project of the fifth phase of the Tabera Hydropower Station. It is also another world-class super large steel bifurcation independently designed after the completion of the world's largest beam type steel bifurcation design for the fourth phase of the Tabera Hydropower Station, demonstrating Chengdu Institute's leading position in the field of pressure steel pipe, especially giant bifurcation design.

The fifth phase of the Tabera pressure steel pipe includes a main pipe, 5 branch pipes, 3 power generation branch pipes, and 3 flood discharge branch pipes. The diameter of the main pipe is 13 meters, the maximum design water head is 158 meters, and the maximum diameter of the crescent rib bifurcation pipe is 14.3 meters. The design of the steel bifurcation pipe group is also subject to the dual constraints of engineering quantity and head loss, in order to ensure that the project cost does not exceed the limit and the electricity output is maximized. Due to the accumulation of successful design experience in the fourth phase of Tabera, the design cycle of the fifth phase pressure steel pipe has been greatly shortened, and the approval time for engineers has been reduced from more than 2 years in the fourth phase to 12 months.

Due to the difficulty of designing and manufacturing this bifurcation pipe, in order to reduce the structural size of the bifurcation pipe and meet the manufacturing and transportation conditions, a crescent rib bifurcation pipe was ultimately adopted. The maximum plate thickness and rib thickness of the crescent rib bifurcation pipe are designed to be 66 millimeters and 130 millimeters, respectively. It is made of 600 megapascal high-strength steel and has a welding filling capacity of over 20 tons. The overall weight of the bifurcation pipe is about 675 tons, and the assembled dimensions are 20 meters x 19.7 meters x 15 meters.

The Tabera V hydropower station is located on the Tabera Dam, which was built in 1976. The project has functions such as irrigation, power generation, and flood control. The fifth phase expansion project will add 1410 megawatts of power generation capacity, and the total installed capacity of the Tabera hydropower station will reach 6298 megawatts, which is of great significance for increasing the proportion of clean energy in Pakistan, reducing dependence on fossil and imported energy, promoting energy structure optimization, and sustainable green development.