The progress is refreshed!The E21 pipe section of the deep and middle channel sinking tunnel completes the sinking docking

On September 21, the deep evening reporter learned from the Guangdong Provincial Transportation Group that the E21 pipeline of the Shenzhong Channel E21 pipeline of the Shenzhen -Macao Greater Bay Area was completed underwater docking. At this point, the installation length of the departure of the submarine tunnel of the Shenzhen -Middle Channel reached 4702.8 meters, and the project construction made a major breakthrough.

The Shenzhen -Middle Channel Underwater Tunnel is 6845 meters long, of which the section of the sinking pipe is 5035 meters long. It consists of 32 pipe festivals and one final connector. It is the first large -scale and domestic application of this structure in the world. Sink pipe tunnel.

It is understood that the E21 pipeline is a standard tube section, 165 meters long, and weighs about 80,000 tons after pouring. In order to further verify the installation accuracy of the sinking tube and provide more accurate data parameters for the final pipe tube, the project first adopted the double -Kongjing dual measurement tower structure in the E21 tube festival.

At 11:10 on September 19th, the sound of the bright whistle sounded, and the floating transport installation operation was officially launched. It overcomes the problem of long -distance base tanks up to 2.7 kilometers long distance.

Affected by the multiple factors such as the current flow rate, the tide tide, the interference of the ionization layer, and the complex terrain, the floating transport installation operation was carried out in the mid -tide period when the overall hydrological conditions were poor, and the construction difficulty and risk increased. To this end, the construction team of the China Communications 1 Aviation Bureau scientific decision -making and deployment of early deployment, solid risk investigation and dynamic control, strengthening meteorological forecast monitoring, locking the best operating window, strengthening the construction of on -site construction organizations, and ensuring the smooth progress of the underwater tunnel construction.

At 23:30 on the 19th, under the escort of the maritime department, integrated ships arrived in the construction waters. At 11:40 on the 20th, after the sinking, pulling, hydraulic pressure connection, etc., the E21 pipe festival was successfully completed. At 3 o'clock on the 21st, after the agglomeration measurement and determination, the E21 pipeline installation and docking accuracy meets the acceptance and evaluation criteria.

At present, the Shenzhen -Middle Channel island tunnel and bridge engineering are two -line. The sinking tunnel has a total of 30 pipelines, and the remaining 2 pipe festivals and one final connector are not installed. It is planned to complete the storage installation of 1 pipe section during the year. East and west artificial islands are promoted in an orderly manner. In terms of bridge engineering, Zhongshan Bridge is carried out on the construction of roads and subsidiary facilities; Lingyuyang Bridge is expected to complete the main cable stocks in September. The project is planned to be opened to traffic in 2024.

Shenzhen Evening News reporter Dong Yuhan

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