Why is the Beijing-Zhangjiakou High-speed Railway Great Wall Station called an underground maze?

According to reports, the Beijing-Zhangjiakou High-speed Railway Great Wall Station is located at the foot of the Great Wall deep in the mountains of Yanqing, Beijing. After media reports, it was called an "underground maze"-like high-speed railway station by netizens.

Reports say that the underground station of the Beijing-Zhangjiakou High-speed Railway Great Wall Station subverts the "common sense of high-speed rail." Media reports say that along the No. 2 inclined shaft for several hundred meters, various trunk and branch tunnels extend in all directions, with water, electricity, and ventilation. With pipelines crisscrossing each other and construction machinery and transportation vehicles shuttling back and forth, the "big guys" who are usually "big" in the tunnel don't look very tall.

According to the person in charge of China Railway Construction, the semi-circular arch tunnel has a maximum span of 32.7 meters and a height of 19.5 meters. It is the underground tunnel with the largest single arch span in China. Although the New Badaling Tunnel with a total length of 12.01 kilometers is the longest in China, It is not the longest, but the Badaling Great Wall Station located in a tunnel is the first in the history of high-speed rail construction.

It is reported that Daling Great Wall Station has a construction area of ​​36,000 square meters, a total length of 470 meters, two platforms, two main lines, two arrival and departure lines, and 4 tracks. The track surface is 102 meters above the ground, making it the deepest high-speed railway underground station in China. The station is divided into three layers of underground structure. From bottom to top, they are the platform layer, the inbound layer and the outbound layer (equipment layer).

I hope the Great Wall Station will be completed soon!