At 9:00 on March 15th, the construction site of the fifth-grade ship lock of the South Third Gorge of the Yangtze River was only heard under the "starting" order. The first six-segment gate of the South Sixth Gate, which weighed 900 tons, was under the control of the "multi-point synchronous lifting system". Automatically start to rise upwards. In just 2 hours, the door body safely and smoothly completed the top elevation of 680 mm.
The trapezoidal gate of the Three Gorges Ship Lock is the largest herringbone in the world. The door is 38.5 meters wide, 20 meters wide, 3 meters thick and 900 tons. The area is close to two basketball courts. Its shape and weight are the highest in the world. "The first door in the world." This time, the door body is to check the bottom self-lubricating bearing of the door body, and complete the replacement of the seal and the adjustment of the back rod of the door.
At 9 o'clock on the same day, under the lifting of four 400-ton "jacks", it was maintained by more than a dozen differently-oriented monitors. The herringbone door was safely raised and the door was in a very stable condition. It is reported that if the traditional top door operation, more than 30 people are required, relying on the manual jack, it takes at least 16 hours, and the safety of the top door is not guaranteed.
The national patent technology “Multi-point Synchronous Lifting System†independently developed by the Three Gorges Navigation Administration has played a key role in this top door, making the top door safer, faster, more labor-saving, time-saving and more accurate. This patented technology not only fills the domestic gap, but also belongs to the world's leading level. It can also be used in a large number of bridges, hydropower units installation and maintenance, etc., which has great promotion and application value.
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