Tunnelling under existing buildings

[SBS34D]

believe it nor not - new MRT tunnels are being constructed right under some buildings, even under the pre-war conservation shophouses.
I have found several research articles online regarding the construction of railway tunnels right under old pre-war shophouses for the Downtown line:
https://www.geocasehistoriesjournal.org ... JGCH_3_3_2

https://www.researchgate.net/publicatio ... _Singapore

https://www.lta.gov.sg/content/dam/ltag ... e_book.pdf

There are also other research articles of tunneling under existing buildings overseas:
https://tunnelingonline.com/advances-in ... ban-areas/

Tunnelling under buildings may look simple or even nothing special. But engineering wise, it is very complicated and lots of works and engineering measures are done to ensure everything goes smoothly and safely.

[Tan_CJ]

Yes. I'm an outsider so can't comment much, but I can imagine the challenges faced when they dig tunnels under existing buildings... I remember the construction of CCL caused cracks to some existing buildings back in those days...