| 摘要 |
In an apparatus for feeding a grouting mass into at least one grouting zone (16) located under the earth's surface or the surface of a structure, consisting of a grouting line (13) which is arranged in a channel (7') starting from the relevant surface (15) and reaching down to the at least one grouting zone (16), serves for pressurised feeding of the injection mass and to whose front end (with regard to the feed direction of the grouting mass) a packing (10) is attached which consists of a grouting pipe (14) closed at the front end, is provided with discharge openings (17) for the grouting mass and has at its two ends the seals (11) sealing off the annular space (18) surrounding the grouting pipe (14) and bearing against the wall of a guide pipe (7), the intention, when fitting a guide pipe (7) having non-return grouting valves (8) into the structure, is to prevent the risk of the non-return grouting valves (8) being permanently closed due to the valve body (24) being immovably encased in concrete. In order to achieve this, the non-return grouting valves (8) are designed as elastic compressible shrouds (24) surrounding the discharge openings (23) of the guide pipe (7) while bearing against it. <IMAGE>
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