up to date!The eastern side of the deep and middle channel sink tunnel is completed and installed

On July 22, the Guangdong Provincial Transportation Group released the news that the E24 pipe festival of the deep pipe tunnel of the Shenzhen -Middle Channel achieved precise docking underwater, and the nine pipe sections on the east side of the sinking tunnel of the project were completed. At this point, the project has accumulated 27 pipelines across the board, with an installation length of 4207.8 meters, and the installation of the sinking pipe section exceeded 5/6.

▲ The E24 pipe festival of the Shenzhong Channel Sinking Tunnel is undergoing floating operations. Chen Mingyu Photo

助 "Hui Eye" helps to accurately underwater docking

The E24 tube section is a standard tube section, 165 meters long, and weighs about 80,000 tons after pouring. On the evening of July 20th, the Dragon Formation of the E24 pipeline festival. Under the escort of the Guangdong Maritime Affairs Bureau and the Shenzhen Maritime Affairs Bureau, the traffic channel with a traffic traffic of over 1,000 times across the Pearl River Estuary was reached at 12:23 on the 21st. Construction waters.

Affected by the recent frequent rainstorm weather, the upstream runoff of the Pearl River has increased, increasing the risk of reflection and the difficulty of floating transportation. "With the help of the underwater" wisdom's eyes ", we have achieved high -precision docking of sinking pipes on the complex construction waters of the shallow beach and the intensity of the stasis." The project manager of the Shenzhen Channel S08 Contract section of the Guangzhou Salvation Bureau, the project manager of Kong Weida.

In addition to the Beidou satellite positioning system and independently developed measurement tower, there are also the construction auxiliary decision -making system of the sinking tunnel. The system was jointly created by the Guangzhou Salvation Bureau of the Ministry of Transport and the Tianjin Water Transport Engineering Science Research Institute, which combines a variety of high -precision equipment functions such as the entire station instrument and attitude sensor. Pipelines docking throughout the process navigation, positioning, and monitoring. At the same time, the construction team of the Guangzhou Salvation Bureau also applied to the world's first ballast -separated all -intelligent gravel -flat sewage ship, and the flattelling accuracy error of the gravel was not more than 2.5 cm.

At 14:00 on July 22, after the refined tone, pulling and hydraulic pressure, the E24 pipe festival completed the docking installation. At 21:30, after the agglomeration measurement is determined, the absolute deviation and relative deviation of the E24 tube festival meet the design and evaluation standards.

利 27 pipe festivals successfully completed the deep sea "settlement"

The section of the deep and middle channel submarine tunnel consists of 32 pipe sections and one final connector. The sinking construction of 23 pipelines (including the final connector) needs to be completed on the west side, and the remaining 9 pipelines are completed on the east side. In August 2021, the first pipe festival (E32) on the east side of the sinking tunnel was completed, and the new journey of the sinking tube was installed on both sides of the east and west sides of the project. The work of the tube. At present, a total of 27 pipelines have been completed across the board.

▲ The E24 pipe festival of the sinking tunnel of the Dragoning Formation is to the site of the tunnel. Photo by Liu Binghui

"Five sinking pipes on the east side are non -standard pipes, and the width has gradually changed from 46 meters to 55.4 meters. It is connected with the tunnel of the East Artificial Island Weir in the underwater underwater." The engineer Xi Junjie introduced that the construction team faced world -class technical problems such as "ultra -width, widening, deep burial, and large bleeding volume", and overcome the ultra -width, widening non -standard pipeline and ultra -weight, ultra -weight, ultra -heavy standards, The sinking installation problem of the tube festival refreshes the world record of the underwater installation width of the sinking tunnel.

决 Smart watering solve the "core" technology of sinking tube

For the construction team, the sinking tube must not only achieve high -precision sinking docking, but also to withstand the test of water pressure and corrosion in the sea for many years. Therefore, the "core" technology poured by the sinking pipeline is particularly important.

The sinking pipeline is a rectangular double -layer steel shell and a composite structure type filled with dense concrete. Each pipe section has more than 2,200 closed partitions. The water pouring accuracy requirements are high, and the pouring process is basically irreversible. In order to complete the prefabrication of high quality, the project R & D team has developed a set of world -first intelligent pouring equipment and systems.

▲ Intelligent pouring equipment for the Shenzhen -Middle Channel project is used to pour the bottom plate of the pipe tunnel pipeline. Zheng Wuxing Photo

"At present, our concrete filling density reaching 100%, solving the problem of coupling stressing the steel structure and concrete. In addition, after process optimization, the construction period of each pipe section is shortened to 29 days, and the pouring of the large underwater sink tube tunnel is constantly refreshed. Record. "Wu Xudong, the project manager of the S08 contract section of Poly growing up, said that while the high -quality completion of the project sinking tunnel E32 to E24, a total of 9 sinking tube poured prefabrication, the project department also summarized the technical results and experience. At present Five technologies have been recognized by national patent invention.

The reporter learned that after completing the installation of the E24 pipe festival, the Shenzhen -Middle Channel planned to carry out the west side of the sink tunnel tunnel at the end of July.

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