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Explain the method of tunnelling in soft rock by "Needle Beam Method".
written 6.4 years ago by gravatar for teamques10 teamques10 ★ 65k •   modified 2.3 years ago

Mumbai University > Civil Engineering > Sem 8 > Construction Engineering

Marks: 10Marks
construction engineering
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written 6.4 years ago by gravatar for teamques10 teamques10 ★ 65k

The needle beam consists of a stout timber beam or a composite flinched beam and form the main temporary support during the excavation. This method is suitable for soils where roof can withstand for a few minutes.

Sequence of operations:

A drift(monkey drift) of about 1 metre is driven on …

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