A few days ago, didn't a fan leave a message asking: What about Line 17?
Line 17 is under construction at full capacity.
According to the news of rail transit, a few days ago, Gaolong Avenue Station of Rail Transit Line 17 successfully entered the foundation pit excavation link, becoming the first open-cut station for deep foundation pit earth and stone excavation on the whole line, marking the phased progress of the construction of the first phase of Line 17 and laying a solid foundation for the follow-up work of the project.
This also means that the construction of the station of Rail Transit Line 17 has officially begun.
The first phase of the project of Rail Transit Line 17 has a total length of 13.9km and a total of 10 stations, including 2 underground excavation stations and 8 open excavation stations. Gaolong Avenue Station is located near Jinfeng Town, High-tech Zone, Chongqing, close to Shaanxi Jianfengqi School Community, with a complex surrounding environment.
Gaolong Avenue Station has a total length of 185.8m, a width of 21.2m, and a depth of about 19m~27m for the main foundation pit. The original landform of the station is farmland and pond, the groundwater is abundant, and the maximum thickness of miscellaneous fill is 24m, so the construction risk of the station is high and the design is difficult. In addition, there are two important power pipelines with a diameter of 500mm in the middle of the station, which is difficult to relocate, and the relocation time is long and the construction period is uncontrollable.
According to reports, in order to speed up the construction of the station, the designers have conducted many field investigations, repeatedly compared and demonstrated the scheme, and incorporated the No. 1 wind pavilion of the station into the synchronous excavation of the main foundation pit of the station according to local conditions, and optimized the foundation pit support form of pile plus internal support to the combined form of pile support and pile anchor, which saved the project investment while reducing the project risk. In order to avoid the risk of uncontrollable construction period of power pipeline relocation, the designer formulated a thorough pipeline protection plan, and used the characteristics of high concrete support strength and high stiffness of the first concrete support of the main foundation pit to adopt suspension protection for the two power pipelines, which further saved the construction period and alleviated the construction pressure of the station.
On March 14, according to the news of the construction unit, the construction of rail transit line 17 resumed. Gaolong Avenue Station has completed the construction of 176 meters of crown beams and 318.08 meters of concrete support, and is currently carrying out the construction of concrete support for crown beams and traffic diversion in the fifth section.
At that time, the excavation of the column foundation of the steel processing plant of Banzhulin Station, the relocation and reconstruction of the rain and sewage pipes, and the leveling of the workers' camp site were also carried out in an orderly manner.
According to the tender announcement, the first phase of the rail transit line 17 project is mainly located in the area of the high-tech zone, with 6 transfer stations, which are transferred to Line 1, Line 7, Line 15, Line 19, Line 27 and Line C4.
According to the plan, the second phase of Rail Transit Line 17 (University Town - Logistics Park Hub) mainly connects University City, Qingfeng, Qingmuguan, Logistics Park and other areas. It is about 13 kilometers long and has 11 stations.
In addition, the third phase of Rail Transit Line 17 (Shuangfu - Shijia Yard) is mainly connected to Jinfeng and Shuangfu. It is about 16 kilometers long and has 6 stations.
That is to say, the total mileage of rail transit line 17 is about 45 kilometers, and after all are completed, it will connect logistics parks, university towns, Jinfeng, Shuangfu and other areas.
At present, Rail Transit Line 17 has entered the stage of starting construction of the whole line, and the excavation of the first station means that the construction period of Rail Transit Line 17 will be further shortened. (Material source: Chongqing Railway Institute, Heavy Science City Weibao, etc.)