In Belgium method of tunnelling

In Belgium method of tunnelling Correct Answer Construction of roof arch is completed before side walls and inverts are built

Related Questions

The length of the needle beam used in needle beam method of tunnelling is usually
Which one of the following statements is not correct for heading and benching method of tunnelling?
Which one of the following statements is not correct with regard to heading and henching method of tunnelling?
Forepoling method is generally adopted for tunnelling in:
Which one of the following methods of tunnelling does not require the use of time bearing?
In compressed air tunnelling, the volume of free air provided is
Which one of the following methods is generally adopted for tunnelling in firm ground
Pick up the explosive used for tunnelling in soft rocks from the following:
For highways, tunnelling is preferred to if the open cut exceeds: