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One track flying frame connects the two cities and enjoys a new life of success

On September 29, the first cross-city rail transit line in Sichuan Province - Rail Transit Ziyang Line will be put into operation. As an important economic corridor connecting the central urban area of Ziyang and the Chengdu Tianfu International Airport area, what will be the profound impact of its opening and operation on Ziyang? What are the highlights?

One track flying frame connects the two cities and enjoys a new life of success

Rail transit Ziyang Line and Chengzi Avenue.

A strategic move

An important engine for the development of urbanization

The Ziyang Line of Rail Transit is a key measure to implement the major strategy of the construction of the Chengdu-Chongqing Economic Circle and promote the development of Chengdu-Chongqing City-to-City Co-city, which has an immeasurable role in promoting the development of Chengdu-De-Meizi City-to-City. It is like a strong link between Chengdu and Ziyang, which can not only effectively promote the interconnection between cities, but also provide solid support for regional coordinated development.

"There is no doubt that the opening of the Ziyang Line can shorten the time and space distance between Chengdu and capital, and will become a bridge for the economic and cultural integration and development of the two places." Jiang Xiaolong, a citizen, believes that the Ziyang rail transit line is of great significance for Ziyang to better integrate into Chengdu's half-hour economic circle, undertake industrial transfer, attract talents, promote industrial upgrading and transformation, and achieve high-quality economic development.

One track flying frame connects the two cities and enjoys a new life of success

Ziyang Line trains.

The development of Chengdu-De-Meizi co-urbanization is an important part of the construction of the Chengdu-Chongqing Twin-City Economic Circle, and rail transit is an important infrastructure to realize the co-urbanization. The opening of the Ziyang Line will further optimize the regional traffic layout, improve transportation efficiency, reduce logistics costs, promote the free flow and optimal allocation of resource elements, and help alleviate urban traffic congestion, improve residents' travel conditions, enhance the quality and image of the city, and promote the sustainable development of the city.

"The high-speed rail ticket from Ziyang to Chengdu is 38 yuan to 50 yuan each, and after the opening of the Ziyang line of rail transit, I may choose to take the Ziyang line." Yu Jing, a Chengdu citizen who works in Ziyang, said that she needs to go to Chengdu every week for business negotiations, and taking the Ziyang Line of rail transit can not only save time for transfers, but also reduce travel costs.

The charm of culture

The unique charm of the station design

The Ziyang Line Project of Rail Transit starts from Futian Station of Chengdu Rail Transit Line 18 and ends at Ziyang North High-speed Railway Station, with a total length of 38.7 kilometers. The station design of the line is unique, which perfectly integrates the rail transit function with the regional culture and airport economic characteristics, showing rich cultural connotation and unique charm.

One track flying frame connects the two cities and enjoys a new life of success

It means taking off by the "machine" Ziyang Airport Station and Airport Depot.

Ziyang Airport Station adopts a grid structure, and the overall shape is like an airplane wing, which means taking off by "plane", showing the rapid development prospects of the airport economic zone; The airport depot makes full use of the terrain conditions, is built against the mountain, and through the cascading and staggered design, it shows the regional characteristics of the mountains and hills, and coexists harmoniously with the surrounding environment.

The design of the four underground stations, including Xingfu Avenue Station, Changhong Square Station, Baotai Station and Ziyang North Station, adheres to the design principle of standardization and modularization, adopts the artistic technique of combining virtual and real, and flexibly uses the curve modeling elements of "spreading wings and taking off" and the modeling elements of Ziyang's specialty "lemon", showing the vigorous development of Ziyang's new style and the vitality and vitality of future development. The decoration of the station also incorporates elements such as Ziyang red culture, Sanxian culture, and stone carving culture, which is not only very modern in style, but also rich in urban historical charm.

One track flying frame connects the two cities and enjoys a new life of success

The three sages cultural elements and the "lemon" modeling elements in the Changhong Square station.

The station has also been designed with the needs of passengers in mind, implementing the concept of "all-age friendly". Each station is equipped with facilities such as accessible toilets, emergency call buttons, and handwashing sinks and toilets for children. Xingfu Avenue Station and Ziyang North Station also have mother and baby rooms to provide intimate services for passengers.

The road to attack

The construction journey of overcoming difficulties

The construction process of Ziyang Line is full of challenges and hardships. The elevated section of the Ziyang Line is 23.47 kilometers long, which is the longest elevated line currently built by Chengdu Rail Group.

If the construction of the viaduct is compared to a dance in the sky, then the construction of the hanging basket is a difficult stunt in the dance. There are a total of 9 hanging basket construction points on the Ziyang Line of Rail Transit, spanning operating highways, expressways, rivers, etc., and the longest section reaches 246 meters.

"The biggest difficulty in the construction of the upper span is that there is a running subway line 18 below, but if a part falls into the rail area, the consequences will be unimaginable." Feng Wei of the No. 1 Project Management Center of Rail Transit Ziyang Line introduced that the Rail Transit Ziyang Line Viaduct is the first Chengdu Metro Line 18 project in the history of Chengdu rail construction, which is in operation across the span, and the safety risk is extremely high. In order to ensure the safe progress of the project, the project team repeatedly refined the construction process through technical optimization, 3D modeling, physical simulation demonstration and other measures. When crossing Line 18, the cap beam is fully enclosed aluminum gusset as the bottom of the protective cover to ensure that not a drop of water will be spilled on the line operating below, and because the construction can only be carried out during the skylight period after the end of operation of Line 18, the daily operation time is only 3 hours.

The project of crossing the Tuojiang River between Baotai Avenue Station and Changhong Square Station is even more challenging. The interval is 2445 meters long, and the strata traversed are mainly moderately weathered mudstone and sandstone strata, of which the length of the Tuojiang River is about 321 meters, the river surface is 8.9 meters from the bottom of the riverbed during the dry season, and the minimum distance from the tunnel vault is 24.1 meters. In the process of crossing, it is necessary to consider not only the safety risks such as gushing, collapse and river backflow that may be caused by the long-distance crossing of the shield, but also the tunneling efficiency. In order to ensure the safety of the project, the joint participating units of Chengdu Railway Group invited well-known experts in the field of domestic shield to conduct on-site investigations for many times, and finally adopted the "earth pressure + slurry" dual-mode shield machine for tunneling construction.

"Compared with traditional shield tunneling, this shield machine can excavate efficiently and better control the formation settlement, and adjust the tunneling mode according to different geological and settlement monitoring data, which ensures the safety and stability of shield construction and provides valuable experience for subsequent similar construction." Tian Li, deputy commander of China Railway Construction Kunlun Investment Group Co., Ltd. and Rail Transit Ziyang Line Engineering Construction General Contracting Department, introduced.

The soul of innovation

A smart track led by science and technology

In the construction process of rail transit Ziyang Line, it has also fully demonstrated the power of science and technology leadership, and adopted a series of advanced technologies and processes.

The thermal slip test is an important verification process for the whole line to have driving conditions in the construction stage. In view of the actual situation of small diameter of shield tunnel and many underground curve sections, Ziyang Line closely followed the forefront of the industry and adopted 27.5 thousand volt rigid catenary for the first time in Sichuan. By uniting the participating units and inviting well-known domestic experts to carry out research, the control level of catenary construction process has been strengthened and the final effect of the hot slip test has been guaranteed.

In the track-laying process, in order to cope with the complex terrain conditions, Ziyang Line adopts a variety of track bed forms, including prefabricated slab ordinary track bed, cast-in-place track bed, prefabricated steel spring floating plate track bed, rubber spring floating track bed, vibration damping cushion track bed, ballasted track bed and other 6 kinds of track bed. At the same time, the intelligent dispatching system of the track area is introduced, and advanced technologies such as the Internet of Things are used to realize nine functions, such as train speed limit and overspeed alarm, video surveillance, real-time positioning of personnel and equipment, and dispatching command sending, which strengthens the safety control of the operation in the track area and improves the operation efficiency.

One track flying frame connects the two cities and enjoys a new life of success

Rail transit Ziyang Line dispatching center.

The Ziyang Line train is also equipped with advanced intelligent equipment, such as on-board information security protection system, track intelligent inspection system, etc. Online monitoring equipment is installed in key parts of the train, and with the intelligent operation and maintenance system, it can grasp the key data of train operation in real time, effectively support vehicle maintenance through analysis and diagnosis, forecast and early warning, and ensure the reliable quality, safety and stability of the online train, and smart and fast. The application of these intelligent devices makes the train operation and maintenance mode more information-based and intelligent, and provides a better travel experience for citizens and passengers.

In addition, in the construction process, the Ziyang line also adopts advanced technologies such as hydraulic climbing formwork construction technology and continuous belt conveyor slag removal technology, which improves the construction efficiency and quality. At the same time, in order to improve the comfort of passengers, vibration damping pads and steel spring floating plates are used to reduce vibration and noise in the track laying in the central urban area of Ziyang, and the track elevation and gauge are precisely adjusted through the track control network (CPIII) plate precision measurement technology, which greatly improves the accuracy of track laying.

The blessing of people's livelihood

A vision of convenient mobility

"With the opening of the Ziyang Line, friends in Chengdu have more opportunities to come to Ziyang to play, and it is more convenient for Ziyang people to go to Chengdu to do things." Citizen Dai Daoxue said excitedly.

The trains of the Ziyang Line are organized by 4 A-type cars in the city, with a maximum running speed of 160 kilometers per hour, and have the characteristics of fast start and stop, high speed and low noise. A total of 11 electric buses are equipped on the whole line, with a total length of 95.8 meters and a width of 3 meters, and the passenger compartment is arranged with longitudinal and horizontal seats, with a maximum passenger capacity of 1,416 people. In the initial operation stage, the first train time of Futian Station and Ziyang North Station of Ziyang Line is 6:30, the last train time is 22:00, and the unilateral (Futian Station - Ziyang North Station) running time is about 26 minutes, which will greatly improve the commuting efficiency between the two places.

Yang Liang, a citizen, said: "It takes nearly 20 minutes to drive from the main urban area to Ziyang North Station, and there may be traffic jams during the rush hour. ”

The ticket price of Ziyang Line is also consistent with the current fare of Chengdu Metro, with a starting price of 2 yuan and a maximum fare of 8 yuan for the whole line, that is, the fare from Ziyang North Station to Futian Station is 8 yuan. If you transfer to other lines of Chengdu Metro, the fare will be continuously metered, from Ziyang North Station to Tianfu Square Station, the fare is 12 yuan, which will greatly reduce the cost of commuting between the two places.

"I have to go home several times a week, and the opening of the Ziyang line can greatly reduce my burden." Li Xia, a citizen who works in Chengdu and lives in Ziyang, said.

One track connects two cities to build a "dream of the same city". From the ancient "Dongda Road" and "Dongxiao Road" to "Chengzi Road" (now the Chengzi section of National Highway 321), and then to the Chengdu-Chongqing Railway, Chengdu-Chongqing Expressway, Chengdu-Chongqing High-speed Railway, Chengdu-Anyu Expressway, Chengdu-Chongqing Expressway, Chengdu-Chongqing Avenue and the soon-to-be-opened rail transit Ziyang Line, the roads connecting Chengdu and Zizi have shortened the time and space distance between the two places again and again. Today, Ziyang has become the prefecture-level city with the largest rail transit density in Sichuan, and the highway network density ranks first in the Chengdu metropolitan area, and the three-dimensional comprehensive transportation system of "8 high, 11 tracks and 16 fast" has gradually changed from a "blueprint" to a reality.

All-media reporter Chen Wei and Zhang Jian

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