What is NATM and TBM?
Using NATM the shape of the profile can be adapted to the clearance profil and space needed for installations (e.g. tunnel ventilation, cable ducts, drainage pipes etc.). In TBM tunneling the excavation profile is circular shaped and therefore larger compared to NATM tunneling.
What does NATM stand for?
NATM
| Acronym | Definition |
|---|---|
| NATM | Not Another Teen Movie |
| NATM | National Athletic Training Month |
| NATM | Nebraska Association of Teachers of Mathematics |
| NATM | Not At The Moment |
What is cut and cover method?
Cut and cover construction involves using excavation equipment to dig a large trench or rectangular hole in the ground which is then covered by a concrete deck. Once the deck is in place, surface activity can largely resume as construction works continue below.
What is conventional tunneling?
Conventional tunneling describes the cyclic construction of underground tunnels of any shape where there is access to the excavation face. Conventional tunneling suggests an arbitrary definition: in the past it has excluded the use of tunnel boring machines (TBM).
Which type of way is constructed during tunneling?
Pipe Jacking Method of Tunnel Construction Pipe jacking method is used to construct tunnels under existing structures like road ways, railways etc. In this method, specially made pipes are driven into underground using hydraulic jacks. Maximum size of 3.2-meter diameter is allowed for tunnels.
Which system provided in tunnel fresh clean air is blown to the working face?
Blowing Ventilation Systems in Tunnel As the name tell, fresh clean air is blown to the working face, with the help of pipes. When it flows back to the portal, it takes the dust and gasses with it. This system of ventilation help providing fresh air near the working face with ease.
What does ATM mean in text?
at the moment
abbreviation. (used in digital communications) at the moment. Also atm.
What is pipe jacking in construction?
Pipe jacking is a trenchless construction method to install product pipe through the ground on line and grade for new service lines, sewer tunnels and utilities.
What are the types of tunnels?
There are three basic types of tunnel construction in common use:
- Cut-and-cover tunnel, constructed in a shallow trench and then covered over.
- Bored tunnel, constructed in situ, without removing the ground above.
- Immersed tube tunnel, sunk into a body of water and laid on or buried just under its bed.
What is the tunnel method?
In simple terms, tunnelling is the physical process of constructing an underground passageway beneath the earth’s surface, tunnels can also be created underwater. To be precise, a tunnel is a more or less a horizontal underground passageway constructed via excavation processes.