TERMIUM Plus®

The Government of Canada’s terminology and linguistic data bank.

BRIDGE ACTION PERIOD [2 records]

Record 1 1992-12-01

English

Subject field(s)
  • Extraction Procedures - Various (Mining)
  • Excavation (Construction)
CONT

Since then, ... (the heading and bench method) ... is used only where the bridge action period of the rock is so short that support is required immediately after blasting and ventilating.

CONT

If the bridge action period is too short to permit mucking, it is necessary to ... support the roof prior to mucking. If the bridge action period is long enough to exclude the danger of ... rock falls ..., the support is usually erected from the drill carriage.

OBS

Rock Tunneling with Steel Supports, 1977.

French

Domaine(s)
  • Procédés d'extraction divers (Exploit. minière)
  • Fouilles (Construction)
CONT

[...] il existe un délai pendant lequel la paroi de l'excavation reste stable. Ce temps de stabilité décroît quand les dimensions de la cavité augmentent. On adapte donc les dimensions des sections creusées en fonction de ce temps et de celui qui est nécessaire pour stabiliser l'excavation [...]. [...] Si le temps de stabilité est trop court ou nul, on procède soit à une préconsolidation du terrain [...], soit à l'utilisation de machines [...]

OBS

temps de tenue de terrain: Ouvrages souterrains. Conception - réalisation - entretien, 1988, p. 57.

OBS

délai d'autoportage; temps d'autoportage : Traité de construction des tunnels, 1970, p. 460.

Spanish

Save record 1

Record 2 1992-12-01

English

Subject field(s)
  • Extraction Procedures - Various (Mining)
  • Excavation (Construction)
CONT

The key factor in timing support installation is so-called stand-up time; i.e., how long the ground will safely stand by itself at the heading, thus providing a period for installing supports.

OBS

bridge action period; Rock Tunneling with Steel Supports, 1977, p. 120.

French

Domaine(s)
  • Procédés d'extraction divers (Exploit. minière)
  • Fouilles (Construction)
CONT

Avant l'amorce de l'effondrement, la roche ébranlée est à même d'assurer pendant quelque temps la stabilité de l'excavation non étayée. Cette période est appelée le temps d'autoportage. (Traité de construction des tunnels, 1970, p. 183).

OBS

temps de tenue : Ouvrages souterrains : conception - réalisation - entretien, 1988, p. 63.

Spanish

Save record 2

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