BRO DG carries out first blast at south portal of Sela tunnel on Army Day
Border Roads Organisation (BRO) Director General travelled around 500 km by road carried out the first blast of the south portal of the Se.... https://in.news.yahoo.com/bro-dg-carries-first-blast-153839190.htmlReply on topic: Sondaj delgisi, İstanbul havaalanı tünelinin tavanını deldi
https://www.dailymotion.com/video/x8rme6q Some building contractor ove...Sözcü newspaper, the drill is seen, still running, boring...us accident is only prevented by the drill cutting through the electricit...saki, when a geological survey drill...Chinese construction company drills into subway tunnel, damaging subway train
In Chinese city of Nanning, a contractor drills down with a drill of 9 centimeters in diameter. And the drill penetrates through the subway tunnel. And then a train comes along, hitting the drill... Is it funny or not? https://www.globaltimes.cn/page/202101/1213725.shtmlReply on topic: Why are all tunnels not excavated via Tunnel Boring Machines?
...ey take many months (at least 10-12 months I am guessing) to produce. So there is a lead time before you can start the excavation, unlike in Drill & Blast method. Most countries have t...
cover tunnel photo by: Matt Brown from London, England / CC BY
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