日本中文字幕中出在线_精品高朝久久久久9999_天天爽夜夜操一区二区_国产精品影片在线免费观看

Location:Home?>?detail
Beijing Underground Diameter Line
Source:CREC Date:2018年11月27日

With a total length of 6,225 meters, Beijing Underground Diameter Line is located at Beijingxi Railway Station. The line is roughly east-west, including 181.2-meter-wide open excavation section, 871.3-meter undercutting tunnel and 5,175-meter shield tunnel.

Beijing Underground Diameter Line

The project is the first fully electrified tunnel of railway built under prosperous urban area. Under complex geological condition of sandy gravel, CREC adopted a large slurry shield whose diameter reaches 11.97 meters to excavating this tunnel, which is firstly used in China. As the tunnel of longest construction distance using large-span shallow-buried tunneling method, it is also the deepest underground continuous wall in Beijing.

Print Close