东非最长隧道顺利贯通_社会生活

东非最长隧道顺利贯通

文章来源：未知文章作者：enread 发布时间：2018-09-25 08:50 字体： [大中小]　进入论坛

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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 Gauge¹ 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 excavation², the project team overcame the challenges of water leaks, uneven³ pressure, shallow-depth excavation, surrounding rocks, structural⁴ fault-line, and oil pipeline⁵ protection.

"With a total length of 4.5 km, the Ngong tunnel is currently the longest tunnel in East Africa and the dominant⁶ 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 clearance⁷ 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.

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收听单词发音

1 gauge
v.精确计量；估计；n.标准度量；计量器
参考例句：
Can you gauge what her reaction is likely to be?你能揣测她的反应可能是什么吗？ It's difficult to gauge one's character.要判断一个人的品格是很困难的。

2 excavation
n.挖掘，发掘；被挖掘之地
参考例句：
The bad weather has hung up the work of excavation.天气不好耽误了挖掘工作。 The excavation exposed some ancient ruins.这次挖掘暴露出一些古遗迹。

3 uneven
adj.不平坦的，不规则的，不均匀的
参考例句：
The sidewalk is very uneven—be careful where you walk.这人行道凹凸不平—走路时请小心。 The country was noted for its uneven distribution of land resources.这个国家以土地资源分布不均匀出名。

4 structural
adj.构造的，组织的，建筑（用）的
参考例句：
The storm caused no structural damage.风暴没有造成建筑结构方面的破坏。 The North American continent is made up of three great structural entities.北美大陆是由三个构造单元组成的。

5 pipeline
n.管道，管线
参考例句：
The pipeline supplies Jordan with 15 per cent of its crude oil.该管道供给约旦15%的原油。 A single pipeline serves all the houses with water.一条单管路给所有的房子供水。

6 dominant
adj.支配的，统治的；占优势的；显性的；n.主因，要素，主要的人(或物)；显性基因
参考例句：
The British were formerly dominant in India.英国人从前统治印度。 She was a dominant figure in the French film industry.她在法国电影界是个举足轻重的人物。

7 clearance
n.净空；许可(证)；清算；清除，清理
参考例句：
There was a clearance of only ten centimetres between the two walls.两堵墙之间只有十厘米的空隙。 The ship sailed as soon as it got clearance. 那艘船一办好离港手续立刻启航了。

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