| 摘要 |
The invention relates to an injection tube for construction joints on concrete buildings, having a basic body which is essentially impermeable to liquid, consists of flexible material, such as rubber or plastic, surrounds a passage channel and is fitted, in its outer casing surface, with at least one groovelike depression extending over the length of the basic body, opening out into which depression are radial openings, distributed over its length, for the outlet of injection liquid from the passage channel, and in which depression a strip is received, which strip covers the openings and is made of a material which is compressible under the internal pressure of the injection liquid, and having a covering which is permeable to liquid and encloses the basic body and the strip in the manner of a tube, a single depression either helically encircling the outer casing surface of the basic body with a predetermined pitch or running axially parallel to the passage channel, but having an opening width of more than 90.degree..
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