| ||||||||||||||||||||||||||||||||||||||||||||||||||||||||
china communications construction company (cccc) has drilled the longest railway tunnel in east africa, the company said monday.
中国交通建设股份有限公司打通东非最长的铁路隧道。
the tunnel is part of phase 2a of the standard 1 railway (sgr) that runs from the kenyan capital city of nairobi to naivasha town.
an aijun, general manager of sgr project head office at the cccc, said that during the 2, the project team overcame the challenges of water leaks, 3 pressure, shallow-depth excavation, surrounding rocks, 4 fault-line, and oil 5 protection.
"with a total length of 4.5 km, the ngong tunnel is currently the longest tunnel in east africa and the 6 work in sgr phase 2a," an said during celebrations to mark the breakthrough of the ngong tunnel.
the phase 2a which extends for about 120 km is set to be completed in 2019. the 4.5 km ngong tunnel has been designed as a single-track railway tunnel with a 7 height of nine meters and a width of seven meters.
cccc engineers used the new austrian tunneling method (natm) of drilling and blasting to build the tunnel and it is the first time that such a method has been used on such a large scale in kenya.
点击收听单词发音
|
||||||||||||||||||||||||||||||||||||||||||||||||||||||||
上一篇:上海计划开发工业旅游资源 下一篇: |
tag标签:
- 发表评论
-
- 最新评论