Micro-Tunnelling Machines for Pipe Roof Support Construction

Diwakar Velu and Kim Yeow Yap, Land Transport Authority, Singapore, present a case study on the use of medium diameter (1.2m) pipe roofing for the construction of underground subway entrances (6.4m H x 8.4m W) with span lengths ranging from 40m to 60m, undercrossing two live roadways - Keppel Road & Spottiswoode Park Road. This paper shares the process involved in construction of pipe roof mined support using micro tunnel boring machines comparing the use of both normal & retractable machines.

📅 Published on: 08 April 2024
📖 Published in: NBM&CW - April 2024
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