Tunnel Engineering

Which one of the following statements is not correct in respect of setting of an inclined tunnel?

  • A. Reference points are constructed at every 300 m
  • B. The alignment is fixed from upper/lower apex point
  • C. The level of the invert at the heading is marked by a tape
  • D. None the above
Answer: Option D.

IS 14665 gives details about elevators. It specifies the number, capacityof elevator and number of floors to be served.

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