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Chuanguan News reporter Lan Zhen photography Hao Fei
Spell the progress bar
Chengdu S11 Line of Chengdu Metro Line 1 starts from Weijianian Station of Chengdu Metro Line 1 and ends at Deyang North Station of Deyang City, with a total length of 70.87 kilometers, connecting Jinniu District, Xindu District, Pengzhou City, Guanghan City and Jingyang District of Deyang City along the line. At present, the project has completed an investment of 1.671 billion yuan, accounting for 83% of the total planned 2 billion yuan. The goal is to complete the cumulative investment of 3.602 billion yuan by the end of the year.
Aerial photography of the construction site of Fengtai 3rd Road Station of Chengdu S11 Line of Municipal Railway.
"Zi~" foggy. On October 15, at Fengtai 3rd Road Station of Chengdu S11 Line of the Municipal Railway, all the dust sprays were turned on, and dozens of meters of elevated sprays were spitting water mist.
In the depths of the ground, more than 20 earth-grabbing machines and excavators waved their "claws" and loaded the dirt into the car with a shovel. Hundreds of large transport trucks shuttled back and forth, transporting mud to other places in batches; The crane's arms are stretched up and down front and back, lifting large materials to move freely.
Although the ground was being excavated everywhere, the reporter did not see any dust at the scene, and the construction was in full swing and orderly.
Chengdu's largest site Excavation earthwork fills 70 football fields
Fengtai 3rd Road Station is the second station of the Chengdu to Deyang Line Project of the Municipal Railway, located at the junction of Panda Avenue and Beixing Avenue, and is the largest station of the subway and urban railway in Chengdu that has been built and is under construction, connecting Weijianian Station in the south, 1 km from the north to south, and the length is close to 5 standard subway stations. "The biggest and most difficult project is the excavation." Wang Fei, deputy director of the construction department of Chengdu Rail Transit Co., Ltd., calculated that the earthwork needs to be excavated 1.06 million cubic meters, and it will take 148 football fields to pile up on a standard football field at a height of 1 meter.
In August last year, the construction of the site began, encirclement, attachment relocation, and frame, and in 2024, the main foundation pit will be excavated. "Throughout the year, most of the construction was done with mud piles." Wang Fei said.
At present, 500,000 cubic meters of earthwork have been excavated at Fengtai Third Road Station, and the main structure has been preliminarily constructed, "The mud has been piled up in 70 football fields!" Qin Jun, the project manager of the civil engineering 1 work area, counted the task ledger: this year's goal is to excavate more than 600,000 cubic meters of earth, and by the end of the year, the shield machine will be lowered and the main structure construction will be completed by 30%. ”
A construction area of 1 km from the north and south ends of the Fengtai 3rd Road site.
How to rush work? "All-weather cross-work!" Qin Jun pointed to the work sheet and explained in detail the construction process of the site - starting at 7 o'clock in the morning every day, the site is mainly based on earthwork and construction, and multiple construction sites are working at the same time, with more than 20 excavators, more than 150 transport vehicles, and more than 200 workers working in turns until 10 o'clock in the evening. "Recently, within the prescribed limit, the working hours of the daytime phase will be extended by three hours." Qin Jun said that after 10 o'clock in the evening, 40 night workers will continue the construction, and the operation content is to maintain the excavated earthwork foundation pit, build concrete and steel frames, and complete the support process. Working hours last until 7 a.m. the next morning.
In this way, the progress bar of the excavation earthwork is refreshed every day. "Now we can dig up to 5,000 cubic meters of soil per day, and the shield machine is just around the corner." Qin Jun is full of confidence.
Construction site.
Divide the whole into zero, multi-point operation to achieve multi-point flowering
The amount of earthwork excavation at Fengtai Third Road Station is large, and the excavation depth is also a very rare 37 meters. Within the city of Chengdu, it is second only to the depth of Luomashi subway station.
Stepping up the sprint, but also pay attention to the construction method, "orderly and high-quality operation is the key to rushing the work!" Wang Fei further explained that in view of the difficulty of construction coordination, the 1-kilometer ultra-long site was reduced to zero, increased to 4 operation faces, organized equipment and personnel in small groups, and carried out parallel flow construction. ”
At the foundation pit operation point near the Phoenix Mountain Music Park at the south end, I saw four cranes pulling the 3-ton stainless steel formwork from the depths of the main structure from all angles, and the workers hurriedly took a wrench to remove the splint, and the forklift followed closely behind to stack the giant formwork neatly. At present, the earthwork excavation has been completed early, and the main structure mold work is being stepped up. On the shore of the operation site, the mixer spits out cement sand and gravel, and a steady stream of concrete pours deep pits.
In the adjacent working face, there is also significant progress in earthwork excavation - the foundation pit has opened a tunnel under Panda Avenue. At present, in order to facilitate construction on both sides of the road, it is necessary to build a convenient pedestrian passage above the tunnel. The Bailey frame is in place, just waiting for the crane and personnel to cooperate with the assembly of the inlay.
The crane and personnel cooperated to prepare for the construction of the Bailey frame.
Pulling the line of sight through, the 70-kilometer construction line is also a multi-point parallel operation, and it is in full swing to catch up with the schedule.
A few days ago, the main structure of Wuzhou Square Station and International Trade City Station has been capped one after another, both of which are more than 30 days ahead of the scheduled period; The first shield machine in the Chengdu section successfully started from Weijianian Station, and the shield machine at Deyang North Station went down the shaft smoothly, and 3 of the 6 underground shield machines on the whole line excavated about 900 meters; The first batch of three prefabricated box girders was poured concrete in the Mengyang beam yard, and the prefabricated production of elevated box girders was fully rolled out......
Chengdu S11 Line is the third urban railway in the Chengdu metropolitan area and an important hub belt to support the integrated development of Chengdu and Germany. In Wang Fei's view, with the opening of the Chengzi S3 line, it is particularly important to accelerate the construction of the Chengde S11 line. "This year, we will step up the completion of most of the earthwork excavation works, and it will be more efficient and faster to dig tunnels and build the main body next year." Wang Fei said.