DTSS Project – TBM launch chamber collapse (Singapore)

Geo-Design were involved in assessing the collapse of a TBM launch cavern in weathered granite for the Deep Tunnel Sewerage System (DTSS) in Singapore. This assessment comprised:

  • Post-collapse investigation.
  • Rock mass characterisation.
  • Engineering analyses of cavern behaviour under critical limited cover.
  • Assessment of remedial techniques including ground freezing.
This project was posted in Caverns and Underground Mines, Sewerage & Drainage.

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