Bridge events: The E21 pipeline of the deep and middle channel sinking tunnel E21 pipeline completed underwater docking

The E21 pipeline of the deep and middle channel sinking tunnel completed underwater docking

On September 21, the E21 pipe section of the deep pipe tunnel of the Shenzhen -Middle Channel completed the underwater docking. At this point, the installation length of the submarine tunnel pipe of the project is 4702.8 meters.

The deep and middle channel's submarine tunnel is 6845 meters long, of which the sinking pipe section is 5035 meters long. It consists of 32 tube festivals and one final connector. It is currently the widest steel shell concrete seabed tunnel in the world. The E21 pipeline is a standard tube section, 165 meters long, and weighs about 80,000 tons after pouring. Under the escort of the maritime department, the Sinks Pipe Floating Transport Installation Boat has successfully arrived in the construction waters. At 11:40 on September 20th, after sinking, pulling, hydraulic pressure and other processes, the E21 tube 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. (Source: Xinhuanet)

Tiange Longtan Special Bridge fully entered the outsourcing concrete construction stage

On September 20, the "World's First Arch" Tian'e Longtan Special Bridge successfully completed the first pouring of the outsourcing concrete, poured a total of 1564 cubic cubic meters, marking the full entering stage of the bridge to enter the outsourcing concrete construction stage.

The total length of the Tiange Longtan Special Bridge is 2488.5 meters. The main bridge is an upper -end -type power skeleton arch bridge with a span of 600 meters. The pouring concrete of the bridge is supported by the strong skeleton. Three links. Each section is poured in sections, and the "3 ring and 7 stages and 8 working noodles" pouring process are used. The bottom plate ring is divided into 6 times. Each time 8 working planes, a total of 10 pump machines, 18 tankers, and construction organizations are invested. And safety management and control is extremely difficult.

In order to ensure the smooth completion of the concrete of the bottom plate ring, under the guidance of the relevant units, the project department strictly controls the temperature of concrete into the molding temperature by holding a technical seminar, and the construction organization is standardized and precise. The technical and experimental departments track the construction process in real time to strictly control the quality of the outsourcing concrete and carry out various tasks in an orderly manner.

In the next step, the project department will further summarize experience, to optimize construction organizations, improve the cooperation and cooperation of the work team, and efficiently promote outsourcing concrete construction, and complete the construction tasks of the full bridge outsourcing concrete at high quality and high standards. (Source: Guangxi Road Bridge Group Public Account)

Guizhou Longli River Bridge plan to complete at the end of the year

Recently, the busy scene of the Longli River Bridge under construction was a busy scene. Under the premise of preventing and controlling the epidemic, 80 construction personnel on the closed construction site of the bridge were under intense construction. The bridge is planned to be completed by the end of this year, and it is now overcome difficulties and stepping up construction. At present, 95%of the project volume has been completed.

The Longli River Bridge is the world's first vehicle lane and glass sightseeing trails. The total length is 1260 meters, the bridge deck is 280 meters away from the bottom of the valley, and the main bridge is the main bridge with 490 meters double -tower dual -cable -faced steel hybrid stacking bridge. The bridge is equipped with a two -way glass boardwalk of 500 meters. The road standard is constructed, two -way four -lane, with a total investment of 1.2 billion yuan.

The Longli Bridge across the Longli River Canyon next to Longli Prairie in Longli County. It is a traffic control project connecting the open economic development of the Longxi Inland Economic Development Economic Development and Longli County. The bridge is the world's first alpine canyon landscape cable -stayed bridge. The bridge is not only the only fast channel connecting the Longli Prairie Tourist Scenic Area and the outside world, but also an important part of the tourist system. After completion, it will promote the development of the local tourism industry and the improvement of the traffic road network in the urban economic belt. At that time, the drive from Guiyang to Longli Prairie will be shortened from 1.5 hours to 30 minutes. (Source: Guizhou Daily)

Jiumian Expressway Heavy Highway Heavy Highway Heavy Highway Pingnan Tunnel runs through

On September 21, major progress made the construction of Jiuzhaigou to Mianyang Expressway. The Pingnan Tunnel, which is one of the specialties of the special tunnel across the line, successfully opened up, laying a solid foundation for striving to achieve the entire project's entire line at the end of 2023.

The Pingnan Tunnel is located in Pingwu County, Mianyang City. It is located in the middle of the Longmen Mountains, with an altitude of about 900 meters and a total length of 3.5 kilometers. The geological conditions of the tunnel engineering are complicated. During the construction process, the project team strictly implements the overall construction plan of "first detection, control over, shortfall, weak disturbance, strong support, fast closed, and diligence test". Taking safety as the first, strict control of quality control, and ensuring high quality of the project.

The total length of the Jiumian Expressway is about 240 kilometers in length and starts in Jiuzhaigou County, Aba Prefecture. It passes through Pingwu County, Beichuan County, and Jiangyou City, Mianyang City. It will start construction in April 2016. It is expected to be completed by the end of 2023. After the project is completed and opened to traffic, the highway will directly reach Jiuzhaigou County. The time from Mianyang to Jiuzhaigou will be shortened to 4 hours. It will further strengthen the revitalization of the tourism industry in the Northwest Economic Zone of Sichuan, the interaction of each other, and the regional tourism industry along the route to promote the economic development along the route. (Source: Xiaoxiang Morning Post)

Wuwei High -speed Tianshan Shengli Tunnel imports three holes, three holes, plus excavation and excavation exceeded 13 kilometers

Recently, major good news came from the Tianshan Shengli Tunnel of the Xinjiang G0711 Line. With the rumbling of the TBM blade, the cumulative digging ruler of the mid -guide hole (service tunnel) has reached 6,162 meters. At the same time, the cumulative ride of the left main cave has reached 3713 meters, the cumulative cumulative on the right main hole has reached 3398 meters, and the three -and -right hole in the left, middle and right, has reached 13,273 meters, and the victory exceeded 13 kilometers. Base. The Wudai Expressway Tianshan Shengli Tunnel, 22.13 kilometers in length, is the longest highway tunnel under construction in the world. It is of great significance to promote the economic and social development of Xinjiang and the integration of national integration in Xinjiang. It has the characteristics of one, two, five, five, five, five, five, five, five, five, five, five, five, five, five, five, five, five, five, five, five, five, five, five, five, five, five, five, five, five, five, five, five, five, five, five, five, five, two highs (tunnels are long, deep, deep, deep in well, high ground stress, high earthquake intensity, high environmental protection requirements, high -cold, high altitude, new construction work law, new application equipment). The typical high -cold and high -altitude highway tunnels in the highway are built. The geology is complicated, the geological fracture zone is crossed, and the construction is difficult.

The construction end of the tunnel imports is arranged at the same time as left, middle, and right. The middle hole uses the TBM hard rock shield machine to excavate the tunnel to open a auxiliary working face for the left and right main holes to achieve the "long tunnel short fight", which effectively saves savings. Construction period. It is reported that the technology is the first application in the construction of domestic highway tunnels.

Since the project team has entered the field, it has overcome difficulties such as harsh climate, many geological fractures, high environmental protection requirements, short validity periods, and traffic occlusion.

Tianshan Shengli Tunnel is the "throat" project of Wuwei Highway. After completion, it will open up the traffic barrier of North and South Xinjiang. It is of great significance to promote the construction of the core area of ​​the Xinjiang Silk Road Economic Belt and promote the development of economic development and regional advantageous resources in the north and south. The completion of this major node has created good conditions for the early pendant of the tunnel and the Uweis Highway on time, creating good conditions. (Source: CCTV)

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