On the morning of June 20, the second phase of Shenzhen Metro Line 9 (West Extension) successfully completed the hot sliding test, marking that the line has fully met the conditions for train operation and is expected to officially open by the end of this year!
The hot sliding test was conducted on the section between Menghai Station and Gaoxinnan Station, with trains running back and forth at speeds of 20 km/h, 40 km/h, and 60-80 km/h.
According to the test, the train ran smoothly. The power supply, signal, communication, catenary, vehicle, and track systems in this section operated stably, and the pantograph-catenary relationship was good, meeting the conditions for train operation.
This marks the successful completion of the hot sliding test for the electric multiple units on the southern extension of Line 9. The line has fully met the conditions for train operation, laying an important foundation for the subsequent comprehensive joint debugging and testing and the transfer of the "three rights".
Engineering difficulties and key points
The geological conditions of the western extension of Metro Line 9 are complex and variable. The line needs to pass through various strata such as gravelly clay, soft soil, water-rich sand layers, and fully and strongly weathered rock, posing high risks and enormous construction difficulties.
1. The embedded sliding groove technology was adopted in the shield tunneling sections of the entire line, achieving a win-win situation of safe and firm segment structure and green, environmentally friendly, fast, and efficient electromechanical installation in the section.
2. The freezing method was used for the first time in the construction of the cross passage between Gaoxinnan Station and Hongli Station, accumulating valuable experience for the subsequent construction of cross passages in Shenzhen Metro.
3. In the section between Nanyou West Station and Nanyou Station, a high-quality "three-no" tunnel was built for the first time, achieving "no damage, no leakage, no misalignment". 98% of the segment construction misalignment was less than 5mm, far ahead of the industry level, creating a new business card for "Shenzhen Quality".
The western extension of Metro Line 9 is a key project of the third phase of Shenzhen's rail transit construction and an important trunk line connecting Qianhai, Nanyou, and Science Park with Futian and Luohu central areas. The line starts from Hongshuwan South Station in the east, passes through Shenzhen Bay to Qianhai Bay, with a total length of about 10.8 kilometers and 10 stations. Among them, there are 5 transfer stations: Qianwan Station transfers to Line 5, Nanyou Station transfers to Line 12, Shenda South Station transfers to Line 15, Yuehaimen Station transfers to Line 13, and Hongshuwan Station transfers to Line 11.
At present, all stations on the western extension of Line 9 are undergoing decoration, installation, and equipment debugging.