#871: S’pore’s Deepest MRT Tunnel & What About Our Nature Reserves? ft. Alvin Sim

What does it take to build Singapore’s rail network deep underground? Alvin Sim, LTA’s Deputy Director of Tunnelling, started his career as a fresh graduate with no tunnelling experience. Today, his work has taken him through granite, marine clay and some of Singapore’s most complex underground conditions, across projects including the Downtown Line and Thomson-East Coast Line.

He takes us behind the scenes of tunnelling and shares what it takes to construct the Cross Island Line up to 80-90 metres beneath the Central Catchment Nature Reserve.

𝙏𝙝𝙞𝙨 𝙚𝙥𝙞𝙨𝙤𝙙𝙚 𝙞𝙨 𝙗𝙧𝙤𝙪𝙜𝙝𝙩 𝙩𝙤 𝙮𝙤𝙪 𝙗𝙮 𝙩𝙝𝙚 𝙇𝙖𝙣𝙙 𝙏𝙧𝙖𝙣𝙨𝙥𝙤𝙧𝙩 𝘼𝙪𝙩𝙝𝙤𝙧𝙞𝙩𝙮 (𝙇𝙏𝘼). Building a well-connected Singapore means going the extra mile, and sometimes, going underground. LTA is committed to tunnelling safely through our dense city, managing the engineering complexities that come with it, and minimising the impact of construction on the communities.

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(00:00) Intro

(02:41) Telling Random Uncles at CNY You're a Tunneling Engineer

(04:04) Tunnels as the "Arteries of the Nation"

(05:44) Going 50m Underground to a Cross Island Line Dig Site