The shield tunnel of intercity changlong to guangzhou south left line is through

In the early morning of August 17, the 4615-meter shield tunnel of the left line from the intercity changlong to guangzhou south station was successfully completed. This is after this paragraph right line passes through another happy event. So far, 84 percent of the 16.68 shield tunnel construction has been completed.

The section from guangzhou south railway station to panyu avenue is the leading section of the fwan-guan intercity railway. The whole line is 11 kilometers long, accounting for about one third of the total length of the line, and it is the section with the largest investment scale.

In the tunnel construction of this section, the upper and lower crossing subway, highway traffic trunk road, high voltage tower, lake, etc., the ground subsidence control requirements are high, the shield tunneling risk is high, the shield tunneling machine also needs to pass through soft soil layer, fine sand layer, hard rock, upper soft and lower hard and other strata, this pearl river delta complex strata, geological conditions are complex, the construction difficulty.

Faced with difficulties, all the project staff sought innovation to ensure the smooth construction. Starting from the improvement of technical capacity and the selection of shield machine, the project carried out innovative design and improvement on the 8.85m large-diameter shield cutter disc, cutter, soil drainage and lining of pipe segments, etc., greatly improving the construction efficiency of the improved shield equipment.

In order to solve the problem of disturbing each other and affecting the construction efficiency of shield dregs in the long tunnel, the project used continuous belt dregs to transport dregs in the shield construction of urban rail for the first time, which was twice as efficient as the traditional dregs. Its "hole continuous belt slag technology" is rated as "international advanced". It has set a new national record of shield tunneling construction for the pearl river delta composite formation with single machine tunneling of 15 rings and 24 meters per day.

It is understood that the Buddha this.i inter-city railway opened to traffic at the end of 2020, will become the important fast trunk road, the eastern guangdong to realize the regional transportation infrastructure overall reached leading level in China and the world advanced level, basic built across the province, radiation pan pearl, service, connecting the world of modern comprehensive transportation system is of great significance.