Hydraulic and earth engineering – Earth treatment or control – Chemical
Patent
1992-05-21
1994-09-13
Corbin, David H.
Hydraulic and earth engineering
Earth treatment or control
Chemical
405262, E02D 312
Patent
active
053463340
DESCRIPTION:
BRIEF SUMMARY
FIELD OF THE INVENTION
This invention relates to a soil conditioning fluid injecting apparatus for injecting a soil conditioning fluid into a soil foundation for the purposes of reinforcement thereof in a civil engineering work such as ground work, and particularly in a ground work where a pipe such as Hume pipe or steel pipe is required to be passed between upstanding piles.
PRIOR ART
This type of an apparatus for injecting a soil conditioning fluid is heretofore used for the purposes of reinforcement of a cavity 5 which is formed by removing soil from an area surrounded by steel sheet piles 3 which have been piled into a soil foundation 1 as shown in FIG. 6. This apparatus is usually installed in the vicinity of an open top of the cavity 5 and operated to inject a soil conditioning fluid into the soil foundation 1 through a rod 7 for the purposes of reinforcement after the soil foundation 1 has been bored with a cutter attached to a front end of the rod 7.
However, when the rod 7 is thrust deep into the soil foundation 1, the apparatus is necessarily encountered with reaction to be incurred to the rod 7. In order to cope with the reaction to be incurred to the rod 7, the apparatus is required to have a heavy weight, or it is required to be fixed to the ground by piles piled into the ground. The trouble is that the area of the soil foundation required to be reinforced is deep under the ground surface, and therefore, a long rod 7 is necessary. For this purpose, the rod 7 is required to be rigid. In addition, it takes a long time for boring. Moreover, because of the reason that the diameter of the rod 7 is shorter than that of a cutter, it gives rise to another problem that an injected soil conditioning fluid tends to leak out upwardly from around the rod 7 within a boring hole and spreads over a wide range of area exceeding a desired position, with the results that a large quantity of soil conditioning fluid and a long injection time are wasted. Furthermore, after the injection is over, it usually takes a considerably long time to set up a device and instrument for removing the fixture means which is necessitated by the heaviness of the apparatus.
Where the apparatus is to be installed within the cavity 5 in order to bore the soil foundation in a horizontal direction, a foothold is required, and/or the apparatus is required to be more firmly fix to the ground and/or it is required to be made even heavier in order to cope with a horizontal reaction. It is therefore an object of the present invention to provide an apparatus for injecting a soil conditioning fluid, which is light in weight and easy to handle, in which fixing, moving and boring work does not take much time, and which is excellent in working performance.
MEANS AND EFFECTS FOR SOLVING THE PROBLEM
To achieve the above object, an apparatus for injecting soil conditioning fluid according to the present invention includes a boring machine for boring a soil foundation and injecting a soil conditioning fluid into the soil foundation for hardening; and magnet fixture means for sucking and securing said boring machine to a magnetic wall surface supporting the soil foundation or to a magnetic wall surface mounted on a member supporting the soil foundation.
By virtue of the foregoing constitution, the apparatus of the present invention is no more required to be heavy. The apparatus can be reduced in weight because it is magnetically sucked to a magnetic body, e.g., a steel sheet pile, in order to release the reaction caused by a digging work. Accordingly, not only transportation of the apparatus becomes easy but also handling of the apparatus becomes easy. When an area for injecting the soil conditioning fluid is required to be shifted in the same direction, i.e., in the horizontal direction, it can be done so with a simple operation. Especially, since the first fixing work of the apparatus can be effected by means of a magnetic force, a shifting operation in a horizontal direction can be performed without having a feel of heaviness of the apparatu
REFERENCES:
patent: 932719 (1909-08-01), Reinhardt
patent: 4711604 (1987-12-01), Heimsoth et al.
Einaru Kikuo
Seko Tomio
Seko, deceased Shinsuke
Corbin David H.
SunEarth Co., Ltd.
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