Indore Metro to start underground tunnelling using 1,000-tonne TBM

The Story in Brief

Indore Metro is entering a major construction phase as a 1,000-tonne Tunnel Boring Machine (TBM) imported from Thailand is being assembled in the city. Officials say the assembly will take about a month, after which the machine will be moved near the Airport to begin tunnelling for the metro’s first underground corridor from Airport to Kalani Nagar. The TBM has a 6.5-metre-diameter rotating cutter head with heavy-duty steel cutters and functions like a mobile underground factory. It can excavate nearly 20 metres of tunnel a day and carries excavated material out on an internal conveyor, while hydraulic systems install pre-cast concrete segments to form reinforced circular tunnel lining.

Two parallel tunnels will be built and about 12 km of the network will run underground; officials estimate this section will take four to five years to complete. The Airport area was chosen for its relatively low population density and will host an underground station. Most TBM components have arrived in Indore in 11 trailers.

The Indian Opinion

The article reports technical details and timelines but uses terms such as ‘biggest construction phase’ and ‘state-of-the-art’ that can sound promotional. Such language is common in press briefings, and readers should note these are characterisations rather than measurable outcomes. Projected rates – like nearly 20 metres of tunnelling a day – and the four-to-five-year estimate for the underground section are expressions of intent and depend on ground conditions, logistics and approvals; the article does not detail potential delays or costs. It also does not discuss local disruptions, environmental assessments or compensation measures, so there is uncertainty about community impacts and mitigation plans.

Original article: Indore Metro To Begin Underground Tunnelling With 1,000-Tonne TBM (www.freepressjournal.in)

This story was summarised and commented on by AI from the source linked above.