Guangzhou metro line 8 cultural park to fenghuang new village section of the short track

On August 27, after more than 100 days of hard work by all the constructors, guangzhou metro line 8 from fenghuang xincun to cultural park completed the completion of the short track, as the rail laying machine moved the last group of steel rails into the precise landing position at the connection point. In order to successfully complete the construction task, guangzhou metro introduced three construction "magic tools", such as the new "tire subway paving machine", "standard rail interchange subway concrete spreading car" and "new energy rail car", which have overcome four difficulties successively.

The track project from cultural park of line 8 to fenghuang new village extends from fenghuang new village station of line 8 to cultural park station in the north, with a length of 3.26 kilometers. Related person in charge of the introduction, the main track construction four "difficulties".

It is already wired construction is restricted

Due to the limited size of the discharge port of tongfusi track laying base, it is impossible to carry out the lifting construction of the standard 25-meter gauge. In order to ensure the construction progress and construction unit detailed feasible construction scheme and safety technical measures, from the line two continents car depot operating routes will be on rail transport to the phoenix xincun station, together with the method of artificial delivery safe and smooth will be transported to phoenix new village to the west and the rail between JieGuiDian, shipping line 20.4 km.

Second, it is difficult to pour concrete

Restricted by many factors, railway vehicles and other transport vehicles cannot directly enter the construction area. After comparison of concrete pouring schemes, technicians decide to use pumping to complete the concrete pouring task in the section. Because the pumping length is more than 600 meters, and the double pump is used for pumping, the construction is difficult. Before each pouring, subway builders carefully organized the connection and reinforcement from the reverse transportation of tooling to the pump pipe, and checked carefully to ensure that no safety holes were missed.

Third, cross - assignments

The construction site involves many units such as civil engineering and decoration, etc. Subway builders have adjusted the construction process and parts through multi-party coordination, and tried to shorten the construction time of each process to ensure the smooth construction.

Fourth, the type of ballast bed is complex

Although the distance between the sections is not long, there are four types of ballast beds, such as general integral ballast bed, medium ballast bed, high ballast bed and special ballast bed. Due to the small construction space in the tunnel, all the tooling and equipment need to be reversed repeatedly, which adds a lot of difficulties to the construction site. The construction unit should arrange the construction plan reasonably and strictly control the working process of each procedure, so as to ensure orderly transformation of tooling and equipment and normal construction of each type of ballast bed.