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The Three Gorges Shiplift is the world's largest shiplift with the highest technical and construction difficulty. In the absence of precedents and reference standards, Chinese companies have boldly innovated and overcome difficulties, completing this world miracle.
Significantly refreshed the world record of the ship lift
As the closing of the Three Gorges Project, the Three Gorges shiplift has dramatically set a new world record for ship lifts.
According to Wu Xiaoyun, deputy director of the Mechanical and Electrical Engineering Bureau of China Three Gorges Corporation, the Austrian Streiby shiplift has a maximum lifting weight of 8,800 tons and a maximum lifting height of 73 meters. It is the world's largest ship lift before the Three Gorges shiplift.
Compared to the Streby ship lift, the Three Gorges ship lift has a total lifting weight of 15,500 tons and a maximum lifting height of 113 meters, which has nearly doubled and nearly one-half.
Different from the wire rope lifting method of the Stryby ship lift, the Three Gorges ship lift adopts the rack and pinion climbing mode.
The German Neffinno shiplift is the representative of the rack and pinion climbing program, with a total weight of 4,300 tons and a maximum lifting height of 36 meters. The Three Gorges ship lift is more than three times the total weight and maximum lift height of the Neffino shiplift.
Correspondingly, the size and manufacturing difficulty of the rack and nut column of the Three Gorges shiplift is the largest in the world. At the same time, it has the world's largest gate equipment, the largest volume ship lift carrier and the most complicated ship lift computer monitoring. system.
According to Wu Xiaoyun, the main gate of the Three Gorges ship lift has a span of 27.0 meters and a self-weight of more than 480 tons, which can adapt to the water level change of 3.75 meters. The lower gate supports a span of 28.1 meters and has a self-weight of more than 670 tons. It can accommodate 1.97 meters. Water level changes.
"Coins don't fall" to witness the engineering miracle
The Three Gorges shiplift consists of the upstream approach channel, the upper gate, the carrier, the lower gate and the downstream approach channel. The carrier is the core part. The effective size is 120 meters long, 18 meters wide, and the normal water depth is 3.5 meters. The scale of the ship is 3,000 tons.
The Three Gorges shiplift is known as the "ship elevator." With the Three Gorges ship lift, it takes only about 10 minutes for the ship to complete a vertical rise or fall of nearly 40 floors. When the reporter took a ship through the Three Gorges shiplift recently, it was found that during the decline of the Three Gorges shiplift, the coins were always erected on the deck.
Originally, the Three Gorges shiplift was driven synchronously by the gear rack mechanism of four driving points. The electric drive system can ensure that the four drive points of the ship's four-point driving point in the electrical synchronous control mode have a full-travel elevation error of less than 2 mm. The highest accuracy of the ship lift in the machine.
Moreover, the Three Gorges shiplift has a total of more than 4,800 monitoring points to collect signals for the operation control, condition monitoring, safety protection and process management of the Three Gorges shiplift.
The civil engineering and partial equipment installation of the main works of the Three Gorges shiplift was completed by China Gezhouba Group Corporation for six and a half years. The civil construction construction meets the requirements of high precision. The height of the load-bearing tower structure of the Three Gorges ship lift is 146 meters. The vertical deviation of the full height of the tower concrete is not more than 30 mm. The allowable deviation of the section size is within 8 mm and minus 5 mm.