Bridge event: Breakthrough progress in Zhanjiang Bay Oceanic Tunnel

The Guangzhan High -speed Railway Zhanjiang Bay Oceanic Tunnel has made breakthrough progress

At 10 am on September 13th, the "Yongxing" shield machine of Zhanjiang Bay Tunnel of the Guangzhan high -speed rail passed through the main channel of Zhanjiang Bay, which did not have any impact on the main channel of Zhanjiang Bay. This indicates that the Zhanjiang Bay Underwater Tunnel has successfully overcome new technical difficulties and achieves breakthrough progress.

Zhanjiang Bay Oceanic Tunnel is a full -length control project with a single hole and double line. Among them, the shield section is 7551 meters, the shield excavation diameter is 14.33 meters, and the outer diameter of the tube is 13.8 meters. Shield tunnel.

"Zhanjiang Bay's main channel is a first -level risk source in the Zhanjiang Bay Underwater Tunnel Project. It is also the deepest part of the cross. It is very strict for shield machine operations, parameter control, and equipment performance. According to the person in charge, the water pressure under the main channel of Zhanjiang Bay is greater, and the shield machine is facing a huge test at the minimum long -range excavation pressure performance at the lowest point of the sea. At the same time, with the extension of the mileage, the material transportation, knife wear replacement, mud tube explosion -proof, shield tail sealing safety, long -range ventilation, long -range ventilation, and long -range ventilation are cracked under ultra -long -distance excavation conditions.

It is understood that the main channel of the Zhanjiang Bay Underwater Tunnel this time is 195 meters long. It is the most important maritime transportation line in Zhanjiang Bay Sea. The size of the cover is under pressure, and the construction difficulty and risk are high.

In order to successfully realize the "Yongxing" shield machine through the main channel of Zhanjiang Bay, the project strengthens maritime monitoring and in -cave monitoring, implements 24 -hour leadership control, and invites shield experts to discuss the technical solution The smallest disturbance completes the mission under the shield. During the main channel through the main channel, Guangzhan Company, the total contracting department, the supervisory unit, and the project department formed a linkage mechanism, formulated strict construction plans and emergency response plans, optimized construction organizations, strengthened the safety and quality control of the process, and monitored Zhanjiang in real time through the smart command center to monitor Zhanjiang in real time. Various data and "Yongxing" parameters of the main channel of the Bay to ensure safe and smooth crossing.

At present, the "Yongxing" shield machine has been excavated in a total of 2770 meters in a total of 2,770 meters, the assembly has completed the 1385 ring, entering the section of over 1,300 meters, and the deepest part of Zhanjiang Bay. It is expected that the overall excavation construction task of the sea section will be completed by the end of the year.

The full line of the Guangzhan high -speed rail is about 401 kilometers. The line starts at the Guangzhou Railway Station. It passes through Foshan, Zhaoqing, Yunfu, Yangjiang, Maoming, Zhanjiang and other cities. Yuan, designing driving speed of 350 kilometers, is the longest high -speed rail project with the longest construction mileage and the largest investment in Guangdong Province. (Source: Guangzhou Daily)

The expansion project of the Jinan Yellow River Highway Bridge enters the upper structure construction stage

On September 11, the expansion of the G104 Jinglan Line Jinan Yellow River Highway Bridge has entered the upper structure construction stage. The G104 Jinglan Line Jinan Yellow River Highway Bridge expansion project is the north -south main road connecting the starting area of ​​the new and old kinetic energy conversion area of ​​Jinan, with a total length of 7.748 kilometers. The main bridge is 6.87 kilometers long. It is the largest span of the Yellow River with the longest -tier steel bridge.

Since late August, the construction of the new bridge has successfully completed the first section of the steel truss rack, marking that the project construction enters the upper construction stage of the bridge, and the project construction is promoted in an orderly manner. Up to now, the 100#main tower concrete pouring has completed a total of 3985m³, the 101#main tower concrete has completed a total of 4930m³, and the total of more than 1,000 pile foundations has been completed across the board, and more than 140 seats inheritance. (Source: Jinan Daily)

Xianfeng Chaoyang Bridge cable hanging system is busy

On September 10th, at the construction site of Chaoyang Bridge, Xianfeng County, Hubei, workers stood on a tens of meters high tower to demolish the cable crane system overtime to ensure that the Chaoyang Bridge was opened to traffic as scheduled in October.

According to reports, the heights of the Sota on both sides of the Chaoyang Bridge cable hanging system are 44 meters and 47 meters, respectively. On August 5, 2022, the Chaoyang Bridge cable crane mission was completed and began demolition. It is planned to complete all demolition work on September 20.

In order to ensure safe and efficiently to promote the demolition work, the leadership team has repeatedly conducted in -depth on -site guidance to the demolition work. Make every effort to ensure that the cable hangs safely and efficiently.

Chaoyang Bridge and wiring projects belong to the "integrated construction" project of Enshi Prefecture. The bridge is 271 meters long and 12 meters wide. The design speed is 40 km/h. The total budget investment is 104 million yuan. After the Chaoyang Bridge is opened to traffic, the distance between the location of the Tangya Tusi City and the National Forest Park of Pingba Camp will play a role in promoting the construction of large transportation and development of large tourism in Xianfeng County. Promote the revitalization of the countryside. (Source: Hubei Daily)

Zengjiang Extra Bridge Successful Heilong

At 16:00 on September 13th, the successful dragon of the Zengjiang Extra Bridge of the Guangshan High -speed Railway marked that another breakthrough progress has been made in the construction of the Guangshan High -speed Railway's heavy difficulty project.

The Zengjiang Extra Bridge is a double tower and double cable -faced concrete cable -stayed bridge. The bridge is located in Shidan Town, Zengcheng District, Guangzhou, with a total length of 2569.48 meters. tower. The main bridge is constructed for the first time in the construction of a high -speed railway cable bridge in the world. Use large shear bonds to improve the anti -shear performance of the stitching of the beam body. The assembly of the section beam is effectively combined with the effects of the longitudinal coarse stress steel rod and the bonding glue, which connects the section beams into the whole as a bridge. Railway driving comfort and safety. This innovative technology has become a new benchmark for domestic high -speed railway construction. According to the relevant person in charge of the Guangzhou Engineering Construction Headquarters: "The main bridge construction process is large, the process is complicated, the accuracy control requirements are high, the bridge line is not easy to control, the construction difficulty is high, and the safety risks are high. In December 2019, the key technical and intelligent research of the "Guangshan High -speed Railway Large Slip section prefabricated concrete chinensis bridge key technical and intelligent research" key topic research team, and overcome the relevant problems as scheduled. "

It is reported that the main bridge section beam has strict requirements on temperature, concrete quality and pouring process. In order to ensure the smooth meeting, the construction headquarters organized a special research unit to conduct special research, formulate the construction plan for the Zengjiang Extra Bridge, and the construction process for the construction process. Perform detailed analysis and optimization, and select the favorable temperature period, and finally achieved the successful pouring of the concrete. (Source: Nanfang Daily)

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