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INFRASTRUCTURE

Robbins TBM takes on karstic limestone below St. Louis

A larger TBM from Robbins solves problems encountered on the first phase of a US tunnelling project

Staff Writer
Designed to detect karst and other underground features, this TBM from Robbins is equipped with enhanced 360-degree probe drilling capabilities, as well as versatile ground support options

Designed to detect karst and other underground features, this TBM from Robbins is equipped with enhanced 360-degree probe drilling capabilities, as well as versatile ground support options

The machine, named ‘Mrs Vera', is boring Phase 2 of the Jefferson Barracks tunnel, a 3,050m (10,000ft) long tunnel in karstic limestone. Designed to detect karst and other underground features, the unique...

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