CE Quiz 68

Structure constructed in tunneling operations, in advance of main drivage, along its alignment, to gain information about the ground is called:

Egg shaped tunnel is most suitable for

A tunnel is found more advantageous as compared to the alternate routes because it

Which one of the following shapes is suitable for the construction of tunnel in non-cohesive soils?

Keel and Bilge blocks are used as:

Which of the following is a semi-natural harbor

Dry dock is meant for

The bridge structure having a gross length of 6 m or less between the faces of the abatement or extreme vintage boundaries is known as

NATM method of tunneling is suitable for

(i) Subway construction

(ii) Abnormal geological conditions

(iii) Soils at medium of shallow depth

(iv) Tunnelling large sections in very difficult ground

The following operations are generally employed for the Needle Beam Method if tunneling:

A) A trench jack is placed on the centre line of the needle beam to support the segment.

B) A monkey drift is driven for a short distance

C) Drift is widened sideways and supported by lagging segments

D) The roof of the monkey drift is supported by lagging

E) The needle beam is slowly skidded forward into the monkey drift.

The correct sequence of operation is