Cross the "Southwest Geological Museum"!The first domestic commercial "dual -streaming" railway is officially opened to traffic 丨 Construction of transportation power

On the afternoon of August 6, with the first train from the St. Temple Station of Jiangjin, the first domestic commercial "dual -stream" railway and Chongqing's first railway Chongqing rail transportation were built by the China Construction Six Bureau. Line 5 was officially opened to traffic to the Jiangjin section (hereinafter referred to as "Jiangjiu Line"). Since then, it only takes 28 minutes to spend the whole process from Jiangjin Shengquan Temple Station.

The Jiangjiu Line starts at the jumping station of the No. 5 Railway Line 5 of Chongqing. It stops at Shengquan Temple Station in Jiangjin District. The total length is about 28.22 kilometers. Six stations at stations and Shengquan Temple Station are elevated stations. The opening of the river jumping line is of great significance for Chongqing to accelerate the construction of a strong transportation city and build a "urban area on the orbit". It is of great significance to build a "1 hour commuting circle".

Ingenuity

Cross the "Southwest Geological Museum"

On April 15, 2020, the control node project of the Jiangjiu Line, the Zhongliangshan Tunnel successfully penetrated. This tunnel project known as the "Southwest Geological Museum" is 3965 meters in length and a maximum buried depth of 215 meters. It is a single hole and double -line tunnel. The terrain is complex and the rock layer is changing. And many special complex surrounding gelatures such as Yongshui Suddenly, which have the characteristics of the "One Mountain, Two Trip and Three Lings" of the Zhongliangshan Mountains.

The project technology tie team uses drones to build a terrain model, use BIM technology to build a tunnel structure model, and use the BIM5D platform to integrate advanced geological forecast and monitoring quantity measurement. Quality first, cost control. Study the use of mobilized mid -part wall construction templates to save 6 months for the project.

In the low gas strata section, the project adopts the construction plan with geological "investigation method+object exploration method (earthquake wave method)+diamond exploration method" to cooperate with the dynamic monitoring of the palmist gas monitoring probe, gas detection and early warning system and reasonable ventilation design to further reduce The risk of gas safety accidents during excavation and blasting ensure the safety of gas tunnel construction and operation.

"Doing dojo in the snail shell"

Power staged "Sister" ballet

The project on the project is located in the main urban area of ​​Chongqing City, the Yaigui high -speed railway in the east of the right line, the Yaigui high -speed railway west of the left line, the high -voltage line of the north and south lines of the north and the north -south line, the high -pressure line of the north -south line of Aojiu in the south, and the construction site is narrow. It is difficult to build, which is equivalent to the "screwdonic shell".

The rotor engineering is designed with a double -line separation of cross -Chongqing high -speed rail. It is 8.8 meters at the minimum distance from the Guigui high -speed rail streamline, the minimum vertical distance is 2 meters. The two bridges have greater eccentricity, and they are "thin and tall."

The project technical tackling team adopts a consecutive jack of traction steel twisted wires for turning construction, and the transitional speed control is 0.02rad/min. On August 28, 2021, two bridges with a length of about 90 meters long and weighing about 4,500 tons were used to successfully complete the turnaround in 2 hours and 30 minutes. Two synchronous turntable construction records.

Efficient performance "build" operation

Conquest the construction problem of the large span continuous beam

The river jumping line passes through the Chongqing High -tech Zone. There are large -area high pier columns and large -span continuous beam construction. The average pier height is about 50 meters high, including 11 and 120 meters of main spans. At the same time, there are many problems such as lagging land acquisition and reform, complex technology, tight construction period, and large amount of engineering.

The project is optimized and optimized for the construction process, lengthening the continuous beam -edge section of the main span of 80 meters, and at the same time reduced the vertical transportation and demolition of the unbalanced weight of about 600 tons.

The main cross -120 -meter continuous beam is adjusted from the cantilever to the overall bracket. The medium -crossing dragon uses the top push construction. This change effectively shortens the construction period of 2 and a half months.

Scientific and technological innovation leadership

The first commercial "dual stream" line in the country

As the first commercial "dual stream" route in the country, the Jiangjiao Line uses mountain AS dual -streaming vehicles. The power supply system uses DC 1500V and AC 25KV dual streaming system. The maximum operating speed is 120 kilometers/h. In addition The advantages of small radius and large passenger capacity. This route has both the high -speed and comfort of intercity train and the characteristics of subway vehicles and fast -stop operations.

△ Citizens who take the Jiangjiu Line. Xinhuanet Liu Wenjing Photo

The Jiangjiao Line is the first domestic (suburban) railway exchange 25kV power supply system and rail transit 1500V power supply system to apply the actual commercial line. Many of the key technologies are the first in China.

After opening to traffic, it can be operated with Line 5 after opening to traffic. It can be convenient to transfer with Line 7 (planning), Line 17 (planning) and the Chongqing -Kunming high -speed rail (under construction). , Will further facilitate the travel of residents along the line, optimize the regional traffic structure and urban functional layout, promote the progress of Jiangjin Rongcheng, accelerate the economic development along the route, help create "urban areas on the orbit", accelerate the formation of the "1 hour commute circle" "Circle" has made positive contributions to the coordinated development of Chongqing's "one district and two groups" and the construction of the Shuangcheng Economic Circle in Chengdu -Chongqing.

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