The pouring started from the connection points of the two divisional construction, and then continued according to the sequence of closing from the free East and west to the middle, from the small ring and supporting beam to the large ring.
As the transfer station of Metro Line 3 and R4, Metro Xinghuo station is located under the hub.
After the double ring structure is supported, the subway Division will continue to dig down.
The total construction area of Beijing Chaoyang Station transportation hub project is 133000 square meters, including the north bus parking building and the South hub transfer hall.
At present, the construction of Beijing Chaoyang Station transportation hub project has pressed the “acceleration key”.
Up to now, the pouring has been fully completed, the double ring structure has been completely closed, the formwork of the overall structure has been removed, and will be put into use.
At 8:00 p.m.
Hundreds of builders worked 24-hour black-and-white shifts during peak hours, creating a speed of 260 tons of reinforcement binding within four days, so as to seize the first opportunity for the smooth spread of pouring operations.
This is the first time that this type of structure has been applied to the construction of large-scale public buildings in Beijing, which will firmly support the construction working surface of underground structure and lay a solid foundation for accelerating the “downward sprint” of the project.
After repeated discussions between the project team and the design and construction units, all parties finally decided to create a “double ring beam concrete support” structure, set two main ring beams with a diameter of 29m and 65m at the position 24.52m below plus or minus zero, and support structural forms such as radiation support beam, support beam and concrete waist beam, so as to form a stable ring support system and effectively support the underground continuous wall of the side wall of the foundation pit, Ensure the structural safety of excavation construction in foundation pit.
At present, the foundation slab construction of the public transport three-dimensional parking building of the project hub Division has been carried out in the foundation pit, but the R4 subway station area of the subway division still needs to continue to excavate nearly 20 meters under the existing foundation pit depth to reach the working face depth.
The pictures and words in this article are copyrighted by Beijing Construction Engineering Group,.
As a key integration project after the merger and reorganization of Beijing Construction Engineering Group, the two teams of Metro division and hub Division will continue to unite under the unified command of Beijing Construction Engineering Group, adhere to drawing a picture and playing key chess, work together and run into the field, and launch a “battle of thousands of people” with concerted efforts, Continue to strive for the goal of serving people’s convenient travel.
According to the plan, an urban comprehensive transportation hub, namely the transportation hub of Beijing Chaoyang Station, will be built on the west side of the station building of Beijing Chaoyang Station.
After completion, it will undertake the passenger flow distribution of Beijing Shenyang passenger dedicated line and the Northeast ring line of suburban railway, as well as the operation of rail transit line 3 and R4.
Only after the subway division completes the excavation and underground structure construction, the public transport three-dimensional parking building on the ground can have the conditions to continue to construct upward.
The subway branch and the hub branch worked closely and cross operated in the same foundation pit, so as to jointly promote the accelerated progress of construction.
In order to maximize the convenience for future passengers to transfer and travel, the subway and hub are constructed in a co construction mode.
On April 14, as two huge rings with diameters of 65 meters and 29 meters were closed and formed in the 24 meter deep foundation pit, the Beijing Chaoyang Station transportation hub project undertaken by Beijing Construction Engineering Group completed the construction of double ring beam concrete support structure.
From April 3, it entered the reinforcement binding and formwork erection stage of double ring structure.
on April 13, the project site was fully qualified for pouring, and the pouring was started.
At the same time, it will meet the transfer requirements with ground buses, taxis and other urban transportation modes, realize efficient and convenient passenger flow distribution, and further optimize the transportation capacity of Beijing Shenyang passenger dedicated line of high-speed railway, At the same time, it fills the gap of comprehensive transportation hubs in large cities in the eastern part of Beijing.
The total concrete pouring volume of the double ring structure reaches 2031m3, of which 1040m3 is located in the construction area of the hub division.
This means that in the same foundation pit, the construction operations of different disciplines are linked, just like debugging a precision machine, pulling one hair and moving the whole body.
In the pouring construction of double ring structure, the project team of Beijing Construction Engineering Group also gave full play to the overall planning and coordination ability of “integrated construction”.
This is also the first application of this kind of support system in the construction of large-scale public buildings in Beijing.
For collaborative construction operations, the project team worked together to optimize the scheme, set nodes and solve the problem of pouring sequence.
As the construction foundation pit is close to the high-speed railway station building of Beijing Chaoyang Station in operation, the project team must create a safe and solid foundation pit support structure to support the structural safety of excavation and underground structure construction.
Therefore, the Beijing construction engineering project team undertaking the construction task innovated and explored the “integrated construction” mode.
Beijing Chaoyang Station (formerly Xinghuo station) is one of the external passenger transport hubs of the city’s railways determined in the Beijing urban master plan (2016-2035).
It is expected to dig down to a depth of 40 meters below plus or minus zero in the first half of this year, and start the construction of subway air duct structure; The hub division is expected to complete the concrete structure construction of the north parking building and the South transfer hall within this year.
