well point
| Noun | 1.well point - a perforated tube driven into the ground to collect water from the surrounding area |
| 单词 | well point | ||
| 释义 | well point
Well PointWell Pointa device in the form of a tube (usually with a diameter of 40–70 mm) that has a filter at the end and is used to lower the level of groundwater. Two types of well points—the light and ejector types—are used. A light well point is connected by a rubber hose and a vacuum conduit to a pumping unit located on the surface. Water is pumped out by means of rarefaction in the well point and conduit, which is produced by a vacuum pump. The height of lift of the water may be up to 6 m. In an ejector well point the water is pumped and a vacuum that promotes drying of the rock is created by an ejector (water-jet pump) mounted within the well point. The ejector is driven by a jet of water forced through the distribution duct by a centrifugal pump located on the surface. An ejector well point raises water from a depth of 18–20 m. A concentrated ejector well point (a so-called concentric vacuum hole) that makes possible accelerated drying of all water-bearing beds has been developed and introduced in the USSR for complex hydrogeological conditions (interstratification of water-bearing and waterproof rocks, low water permeability, and the presence of quicksand). REFERENCEPonizhenie urovnia gruntovykh vod legkimi iglofil’trovymi ustanovkami i ezhektornymi iglofil’trami. Moscow, 1958.well pointwell point
Synonyms for well point
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