Top class CECA engineering in building tunnels. Sickipoora should encourage them to build more MRT tunnels.

[A Singaporean]

https://www.channelnewsasia.com/asia/india-collapsed-tunnel-uttarakhand-heavy-machinery-3918761

 

[Loofydralb]

Apparently a serious vibration and tremor occurred at the time.

The tunnel collapsed because the limit was exceeded on the number of heads shaking at any one time.

 

[nabeifuckpap]

 

[syed putra]

Its a earthquake zone. plus construction materials are from china.