The 70 -meter -high pier "move" 10,000 -ton steel box beam, Wuhan power helps this super engineering

Jimu Journalist Lu Rui Ma Qingni

Correspondent Sun Yan Hong Xunqi

Sea Tianyun steamed, and the construction site of the Lingyuyang Bridge project of the China Communications Second Airlines Bureau was a busy scene. On August 2nd, Jimu News reporters were informed that the upper right push construction of the cross -east anchor on the bridge entered the final critical stage. The entire steel box beam weighed nearly 10,000 tons, with a total of 360 meters in the push mileage. The top push support is as high as 70 meters, which is equivalent to more than 20 floors height. The team of the China Jiaotong Bureau of China Second Aviation Bureau was carefully designed and took advantage of the team's team to use multiple high -tech and innovative methods to ensure the safety and stability of the tens of thousands of tons of steel box beams in the sea.

The Shenzhen -Middle Channel Lingyuyang Bridge during construction

Steady -type top push technology, so that the steel box beam "handling" "handling" steadily

The Shenzhen -Middle Channel is another super cross -sea cluster project that integrates "bridge, islands, tunnels, and underwater interoperability" after the Hong Kong -Zhuhai -Macao Bridge, with a total length of 24 kilometers. Among them, the Lingyuyang Bridge is the key control project of the project, and it is the world's largest span of the steel box beam suspension bridge. On the bridge across the east anchor on the right, the construction of the right push into the final critical stage. The entire steel box beam weighs nearly 10,000 tons, the steel box beam is 306 meters long, the maximum top push span is 79 meters, and the tank beam push mileage is 360 meters. It is completely in the marine environment. It is currently the highest piercing construction in China. It is affected by the rise and ebb, and the construction safety risk is high.

In order to ensure the stability of the "handling" of the box beam, the technical team adopted the "step -type intelligent top push technology" won the China Patent Gold Award.

During the construction, the project team set up a total of 16 1,200 tons of step -level push equipment for top push. Under the accurate command of the "top push brain" of the automatic control system, the hydraulic automatic control system ensures steadily movement and decentralization of the main bridge steel box beam. On average, each top -pushing device and equipment with 6 pressures and 6 displacement intelligent sensing equipment It is equivalent to 64 "mechanical legs" to move 10,000 tons of steel box beams to move together to automatically identify and accurately locate to ensure that the whole process of the steel box beam is automatically fitted with the design line of "straight in the song" to achieve millimeters of millimeter. Grade push He Long.

The "insole" design provides "steady reliance" for the permanent pier of the steel box beam

In the design of the top push plan, the technical team cleverly used the four permanent pier as a supporting support pier, reducing the setting of 40 meters of temporary pier, optimizing the amount of temporary engineering materials of about 2,000 tons, which greatly saved the construction of construction. cost.

In order to avoid the impact of the different perspective of permanent pier and temporary pier materials on the safety of the top push, the technical team will be more compared with the design elements of the temporary pier top pier. In the installed "insole" that can be installed, the steel box beam is "stable". It can adjust the height of the "insole" in a timely and accurately according to the pressure displacement of the on -site pressure to escort the smooth push construction.

The "flat load" beam design, helps the steel box beam push from the curve to the straight line to turn

The bridge steel box beam assembly area is located in a curve area with a radius of 6000 meters. During the push process, the "steering" from the curve to the straight line needs to be completed. It is always supported on the steel box beam belly plate with a thickness of only 1.8 cm. It cannot be "moved" horizontally with the steel box beam. If the top of the equipment deviates from the abdomen, the bottom plate of the steel box beam will be destroyed.

To this end, the technical team repeatedly discussed and thought about it, and innovatively proposed to add a "flat burden" beam on the two top push devices on the top of the pier, just like two people picking the steel box beam, so that no matter how horizontally the abdomen moves, They can't escape the palm of the "flat burden" beam, which protects the stress safety of the steel box beam.

The Shenzhen -Middle Channel is expected to be opened to traffic in 2024. It only takes 30 minutes from Shenzhen to Zhongshan after opening to traffic to reach the history of the people in western Guangdong to Shenzhen. The urban agglomerations of the Guangdong -Hong Kong -Macao Greater Bay Area in the fields of humanities, logistics, economy, and culture and the interconnection of transportation.

(The picture is provided by the correspondent)

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