45.5 meters deep 15 15 15 深 15th floor Chengdu's deepest subway station smoothly "bottom" to the bottom

What is the concept of 45.5 meters deep? If the level of the first floor is 3 meters, 45.5 meters are equivalent to 15 floors underground.记者从成都轨道建设管理公司获悉，8月24日，成都在建地铁线路中最深的车站，也是唯一一个四线换乘站——18号线骡马市站“见底”，顺利开挖到45.5 meters deep. The parallel Metro Line 1 Luoma City Station, the cumulative settlement monitoring data is 7.36 mm, only the length of rice grains, which meets national standards (national standards are 10 mm).

Why is it so deep? The station bears the four -line transfer function

As the first in Chengdu, it is also the only four -line transfer station in the construction line. Line 1 and Line 4 Luoma City Station has been completed. Essence

"Because it is the four -line transfer station, and Line 18 is at the bottom, so the station is particularly deep." Nan Kuangfei, deputy director of the project management company of Chengdu Rail Construction Management Company, introduced it to reporters. The stations of the four subway lines are Line 1, about 17 meters deep; Line 4, about 24 meters depth; Line 10, about 35 meters depth; Line 18, the deepest part of 45.5 meters depth.

"What is the concept of 45.5 meters deep? If the height of the first floor is calculated at 3 meters, 45.5 meters are equivalent to 15 floors underground." According to reports, such a deep subway station is not only "the most in Chengdu", but also It is rare in the country. The Luoma City Station on Line 18 also reached a total of 6 floors of "luxury configuration". Among them, the first floor of the ground floor is the transfer hall layer of Line 1, 4, 10, and 18, and the second floor of the underground. The station hall layer is the reserved layer, the four underground floors are the equipment layer, the fifth floor of the underground is the platform layer and equipment layer of Line 10, and the sixth floor of the underground is the platform layer 18.

Digging to see the bottom "Neighbors" Line 1 Luoma Station only sinks the rice grains height

On August 24th, with the completion of the base earthwork, the third phase of the Line No. 18 Line 18 Line Line Lotum Lotum Lottery Lotten 7 months of foundation pit excavation bottom. When the cumulative 7.36 mm coming out of Metro Line 1 of Metro Line 1 came out, the builders at the scene applauded. "It's not easy!" Nan Kuafei said excitedly that this was the joint force of more than 100 plan demonstrations, 7 months of "careful" construction, and two hours of monitoring data from two hours a day.

"Line 18 Luma City Station and Line 1 of Line 1 of Line 1 have recently appeared in parallel relationships. You can imagine that you have dug one next to Line 1 of Line 1 of Line 1 The depth is equivalent to a huge pit with a negative 15 -story, 27 -meter wide, and 200 meters long. The earthquake excavation reaches 400,000 cubic meters. It is equivalent to the length of a grain of rice. The national standard is 10 mm. This is also extremely rare in the country. "He said.

When you want to excavate in a deep and large foundation pit, you also make sure the adjacent buildings are "motionless", and how to deal with precipitation to play a decisive role. "Doing underground projects must carry out precipitation. But with the extraction of groundwater, the loss of water and sand in the strata will affect the stability of the strata." How to achieve both precipitation and prevention? "We first change the traditional way of precipitation and pump water to small power to pump water. This can bring out the sediment as little as possible." At the same time, the grouting of Line 1 Luoma City Station- "This is this It is equivalent to giving it hyaluronic acid and reinforcing the strata with special fillers. "Said Huang Guangzheng, a project manager of the third phase of the Titan Phase 1 of Line 18 of China Railway.

In addition, the project department also adopted a "enhanced version" on the foundation pit support, and monitoring data is retrieved every two hours ...

"Next, the station will carry out the main structure. It is expected that in April next year, the main structure is expected to be capped." Nan Kuaifei said.

Chengdu Daily Jinguan News Reporter Yuan Hong picture with video from the interviewee provided by the video, Yuan Hong, the editor of He Qixie Editor Liu Yonghao

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