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UPLIFT PRESSURE [9 records]

Record 1 2019-01-31

English

Subject field(s)
  • Deep Foundations
  • Sewers and Drainage
  • Soil Mechanics (Engineering)
DEF

A long, relatively slender structural foundation element(plate, post, plank, beam, board, etc.), usually made of timber, steel or reinforced or prestressed concrete, that is driven or jetted into the ground or cast in place and that is used to support vertical or lateral loads, to form a wall to exclude water or soft material or to resist their pressure, to compact the surrounding ground, or rarely to restrain the structure from uplift forces.

OBS

pile: term standardized by ISO.

French

Domaine(s)
  • Fondations profondes
  • Égouts et drainage
  • Mécanique des sols
DEF

Élément relativement élancé, introduit dans le sol par un moyen mécanique, dans le but de renforcer le sol, de le drainer, ou d'assurer le report des efforts verticaux ou horizontaux d'un ouvrage.

CONT

[...] ce sont des pièces longues et de faible section qui servent de liaison entre le bon sol et la fondation en traversant les couches de terrain jugées mauvaises [...] Les pieux peuvent être en bois, en béton armé ou en acier. Les plus couramment utilisés sont ceux en béton armé [...]

OBS

pieu : terme normalisé par l'ISO.

Spanish

Campo(s) temático(s)
  • Cimientos profundos
  • Alcantarillas y drenaje
  • Mecánica del suelo
Save record 1

Record 2 2014-10-17

English

Subject field(s)
  • Fluid Mechanics and Hydraulics (Physics)
  • Dams and Causeways
DEF

The upward pressure against the base of an impervious dam, transmitted by water in the foundation from the water behind the dam, or pressure on the upper surface of any horizontal joint or crack in a dam. Such pressure tends to offset the weight of the dam and in some cases to overturn it; it reduces the dam’s stability or resistance to overturning.

DEF

Pressure in an upward direction against the bottom of a structure, as a dam, a road slab, or a basement floor.

French

Domaine(s)
  • Mécanique des fluides et hydraulique (Physique)
  • Barrages et chaussées
DEF

Pression dirigée vers le haut, dans les interstices (pression interstitielle) d'un corps ou sur la base d'un ouvrage.

DEF

Action exercée par l'eau présente dans les terrains sur les constructions totalement ou partiellement enterrées (fondation de barrages, revêtements de canaux ou de galeries, etc).

CONT

Le drainage, placé le plus près possible du parement amont, a pour but essentiel de réduire - voire de supprimer - la sous-pression, de recueillir l'eau qui pourrait pénétrer dans le corps de l'ouvrage et de l'évacuer.

Spanish

Save record 2

Record 3 2012-01-05

English

Subject field(s)
  • Geophysics
CONT

Carmichael(1978) introduced the concept of metamorphic bathozones and bathograds as a measure of the depth of regional post-metamorphic uplift and erosion. This concept is used... to complement the limited quantitative barometry currently existent... Where quantitative information about P-T [pressure-temperature] is presented herein, the equivalent bathozone is given in brackets for convenience; it should be recognized, however, that pressures derived from quantitative barometry and mineral assemblages are not directly equivalent.... Using five bathograds Carmichael(1978) defined six bathozones, numbered from 1 to 6 in order of increasing pressure...

OBS

bathozone: term used at Natural Resources Canada - Earth Sciences Sector.

French

Domaine(s)
  • Géophysique
CONT

À l'échelle locale, on peut reconstruire les surfaces isobares aptes à définir une bathozone; nous préconisons une valeur de [delta] P [écart de pression] de 2 kbar dans le cas de la bathozone grenat - biotite - kyanite.

OBS

bathozone : terme en usage à Ressources naturelles Canada - Secteur des sciences de la Terre.

Spanish

Save record 3

Record 4 2010-12-02

English

Subject field(s)
  • Tectonics
DEF

The uplift of a regional area of the Earth's crust, usually as a result of the release of isostatic pressure, [as in the] melting of an ice sheet.

CONT

Mountains are formed by the folding, faulting, or upwarping of the Earth’s surface due to the movement of plates ... or by the emplacement of volcanic rock onto the surface.

OBS

warping: The slight flexing or bending of the Earth’s crust on a broad or regional scale, either upward (upwarping) or downward (downwarping).

OBS

upwarping: term used at Natural Resources Canada - Earth Sciences Sector.

Key term(s)
  • up-warping

French

Domaine(s)
  • Tectonique
OBS

gauchissement : Déformation tectonique lente se traduisant par des bombements ou des basculements.

OBS

gauchissement vers le haut : terme en usage à Ressources naturelles Canada - Secteur des sciences de la Terre.

Spanish

Save record 4

Record 5 2005-03-21

English

Subject field(s)
  • Geomorphology and Geomorphogeny
DEF

A small dome-shaped uplift of soil caused by the pressure of ground water.

French

Domaine(s)
  • Géomorphologie et géomorphogénie
CONT

Buttes gazonnées de terre.

Spanish

Save record 5

Record 6 2004-10-13

English

Subject field(s)
  • Speleology
DEF

Consists of two or more joint sets or any group of joints with a characteristic pattern, such as a radiating pattern, a concentric pattern, etc. ...

CONT

The network pattern of cave systems, their correspondence with joint systems, and their generally horizontal levels are all well suited to the theory of a disintegration origin, due to release of former high pressure on sedimentary rocks during uplift, and the subsequent excavation of passages and chambers by streams.

French

Domaine(s)
  • Spéléologie
DEF

Consiste en deux ensembles ou plus ou d'un groupe de diaclases avec une configuration caractéristique, telle que radiale, concentrique, etc. [...]

CONT

[...] le système de diaclases et de karsts, induit par la dissolution des calcaires du plateau, a généré une remarquable concordance de voies souterraines naturelles convergeant au centre du site gallo-romain de Grand et donnant naissance au jaillissement de la source, objet du culte gallo-romain.

Spanish

Save record 6

Record 7 2002-04-18

English

Subject field(s)
  • Meteorology
DEF

development: Term generally applied in synoptic meteorology to the intensification of depressions or anticyclones.

CONT

Upper-level westerly or southwesterly winds from a tropical cyclone can create a downstream environment to the east that is favorable for the development [formation] or intensification of another tropical cyclone, despite the appearance (on satellite imagery) of strong westerly shear across the downstream tropical cyclone.

CONT

... winds tend to blow into low-pressure areas because air moves from areas of higher pressure into areas of lower pressure. As winds blow into a low, the air can be uplifted. This uplift of air can lead to the development of a depression with clouds and rain.

PHR

Intensification of a cyclone.

French

Domaine(s)
  • Météorologie
DEF

Terme généralement appliqué, en météorologie synoptique, à l'activité et à la force des dépressions ou des anticyclones

CONT

Les images prises par Meteosat dans l'infrarouge se sont avérées particulièrement utiles pour surveiller l'intensification des dépressions du 5 au 9 [...] juillet.

PHR

Intensification des dépressions, des anticyclones.

Spanish

Save record 7

Record 8 1996-03-31

English

Subject field(s)
  • Waste Management
  • Nuclear Waste Materials
CONT

There are two forms of injection into deep geologic formations that have been suggested or used for LLW disposal : hydrofracture and deep well injection. Both methods are primarily useful only for liquid or finely ground wastes. They both take precautions to prevent contaminating useful aquifers by carefully selecting the geologic formations into which the waste is injected. Hydrofracture disposal also uses a very insoluble waste form. Generally, hydrofracture involves injection of a mixture of waste and liquid grouting materials under high pressure into a deep layered rock formation such as shale. The injected material causes layers of rock to separate and the material forms flat "sheets" extending out from the injection well. The grout causes some surface uplift near the injection well.

CONT

Because of difficulty in transporting liquid wastes safely, the hydrofracture facility must be located near the source of the waste. A hydrofracture site requires large, generally impermeable (to nearby aquifers) layered formations that fracture horizontally. The surface area needed and visual impact of a hydrofracture facility are relatively small. Major barriers to nuclide release are the grout (waste form) and the geologic formation used. Perhaps the greatest problem with hydraulic injection is that there is little control of fracture propagation and it is not possible to define the final geometry of the grout/waste sheets from the surface.

CONT

Hydrofracturing would not be appropriate for Eldorado wastes because of the large volume of waste and the questionable ability to dry and pulverize it to the necessary fineness (40 mesh or smaller).

French

Domaine(s)
  • Gestion des déchets
  • Déchets nucléaires

Spanish

Campo(s) temático(s)
  • Gestión de los desechos
  • Desechos nucleares
Save record 8

Record 9 1993-09-10

English

Subject field(s)
  • Waste Management
  • Nuclear Waste Materials
CONT

There are two forms of injection into deep geologic formations that have been suggested or used for LLW disposal : hydrofracture and deep well injection.... Generally, hydrofracture involves injection of a mixture of waste and liquid grouting materials under high pressure into a deep layered rock formation such as shale. The injected material causes layers of rock to separate and the material forms flat "sheets" extending out from the injection well. The grout causes some surface uplift near the injection well. Hydrofracture has been used at the Oak Ridge National Laboratory since the 1960's to dispose of intermediate level liquid radioactive wastes. Hydrofracture tests were also conducted at West Valley....

French

Domaine(s)
  • Gestion des déchets
  • Déchets nucléaires

Spanish

Save record 9

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