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Record 1,  Textual support,  English

Record number: 1, Textual support number: 1 DEF

A hollow vertical tube, rod, or pipe terminating in a perforated pointed shoe and fitted with a fine-mesh wire screen; connected with others in parallel to a drainage pump; driven into or beside an excavation to remove underground water, to lower the water level and thereby minimize flooding during construction, or to improve stability.  4, record 1, English, - wellpoint

Record 1,  Textual support,  French

Record number: 1, Textual support number: 1 DEF

Tube métallique muni à son extrémité d'un filtre en forme de pointe et utilisé par fonçage dans le sol pour exécuter un rabattement de nappe.  4, record 1, French, - pointe%20filtrante

Record number: 1, Textual support number: 1 CONT

Le fond de fouille est au-dessous du niveau de la nappe [...] on procède à un rabattement de nappe par pompage, en principe à l'extérieur de la fouille. Suivant la perméabilité du sol et la hauteur de rabattement, on dispose un réseau de pointes filtrantes, qui sont des tubes d'acier crépinés foncés par battage et reliés en tête à un collecteur sur lequel est montée une pompe de surface. La hauteur d'aspiration est limitée pratiquement à 7 ou 8,00 m.  5, record 1, French, - pointe%20filtrante

Record number: 1, Textual support number: 1 OBS

Dans le cas où la hauteur de pompage est plus importante, on a recours à des puits filtrants équipés chacun d'une pompe immergée dont la hauteur de refoulement n'est plus limitée.  5, record 1, French, - pointe%20filtrante

Record number: 1, Textual support number: 2 OBS

Selon les sources consultées, «puits filtrant» est soit synonyme de «pointe filtrante», soit qu'il s'en distingue de par ses dimensions et par le fait de comporter une pompe immergée; selon d'autres, il ne désigne plus un tube métallique mais un trou foré (puits) terminé en sa partie inférieure par une crépine; pour ajouter à la confusion, «pointe filtrante» peut ne désigner que la partie inférieure d'un puits foncé.  6, record 1, French, - pointe%20filtrante

Record 1,  Textual support,  Spanish

Record 2,  Textual support,  English

Record number: 2, Textual support number: 1 DEF

The lowest part of a drivers well, consisting essentially of a forged steel point, a screen, and short section of pipe threaded to fit a standard pipe.  3, record 2, English, - well%20point

Record number: 2, Textual support number: 1 CONT

Well-point [drainage] method. The term well point refers to the lower perforated end of a 2-in. or 2 1/2-in. pipe, commonly 40 in. long, that serves the double purpose of well casing and suction tube. The perforations are covered by a wire mesh. The well points are jetted into the ground at a spacing of 3 to 6 ft.  4, record 2, English, - well%20point

Record number: 2, Textual support number: 2 CONT

Basically, a well point is a perforated and screened pipe, about 1 1/2 in. in diameter and a few or several feet in length. The well point is fixed to a riser pipe, also of the same diameter, and the whole is driven with or without jetting ... The individual riser pipes are attached to a header pipe or manifold that leads to a pump.  5, record 2, English, - well%20point

Record 2,  Textual support,  French

Record number: 2, Textual support number: 1 DEF

Partie inférieure d'un puits foncé, comprenant une pointe en acier forgé, une crépine et un court tronçon de tube fileté.  1, record 2, French, - pointe%20filtrante

Record 2,  Textual support,  Spanish

Record 3,  Textual support,  English

Record number: 3, Textual support number: 1 DEF

A method of draining a water-bearing soil around an excavation to reduce the pumping required within it and to strengthen the ground. A tube about 2 in. diameter is sunk by jetting into the water-bearing soil. It is fitted with a close-mesh screen at the bottom, and connected through a header pipe to a suction pump at the top. Generally, a number of wellpoints are put down and connected to one header pipe. Wellpointing is not effective in fine-grained sand.  1, record 3, English, - wellpointing

Record 3,  Textual support,  French

Record number: 3, Textual support number: 1 CONT

Assèchement d'une fouille par pointes filtrantes [...] On utilise des pointes filtrantes [...]; leur diamètre sera de 6 cm; le collecteur étant situé au niveau du sol, la pompe se trouve 0,50 m au-dessus.  1, record 3, French, - ass%C3%A8chement%20par%20pointes%20filtrantes

Record 3,  Textual support,  Spanish

Record 4,  Textual support,  English

Record number: 4, Textual support number: 1 DEF

Essentially a shallow well comprising a small well screen of about 50 mm diameter by 0.5 - 1.0 m long, connected to a length of riser pipe which can be installed by jetting with a high-pressure water-jetting pump. Wellpoints are normally closely spaced (1-3 m) to enclose the excavation to be dewatered and connected to a common suction-header main and thence to a high-vacuum suction pump.  1, record 4, English, - wellpoint

Record number: 4, Textual support number: 2 DEF

A tube well in which a strainer is interposed at the level where water-bearing strata must be tapped.  3, record 4, English, - wellpoint

Record 4,  Textual support,  French

Record number: 4, Textual support number: 1 DEF

Puits foncé, muni d'une crépine, et qui permet le captage de l'eau provenant d'une formation aquifère.  1, record 4, French, - puits%20cr%C3%A9pin%C3%A9

Record 4,  Textual support,  Spanish