Hydraulic and earth engineering – Drainage or irrigation – Porous waterway – e.g. – sand drain – etc.
Patent
1990-08-24
1992-09-08
Corbin, David H.
Hydraulic and earth engineering
Drainage or irrigation
Porous waterway, e.g., sand drain, etc.
173 49, 405232, E02B 1102, E02D 310
Patent
active
051452790
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
The present invention- relates to a public works machine, usable particularly for laying vertical drains, not only on land but also under water.
Generally, vertical draining is carried out so as to improve the bearing capacity of certain soils, such as compressible soils intended to receive building works foundations.
The invention is particularly well adapted to laying flexible artificial drains such as linered tubes or strips, covered or not with a textile filter and disposed in a pre-established mesh of approximately several meters to the meter, depending on the draining capacity to be obtained.
PRIOR ART
Among the current drain laying methods, a method is used in which a steel tube surrounding the drain is driven in vertically, the foot of the steel tube being equipped with an expendable shoe fixed to the drain. This driving in operation is performed by a mobile machine movable along a path corresponding to the chosen mesh.
SUMMARY OF THE INVENTION
With the increase of drainage depths (up to 30 to 40 meters), the lengths of drains to be laid on the site nowadays reach several hundred kilometers. The invention proposes a high yield laying machine for reducing the on-site times. The invention provides then a public works machine, usable more particularly for laying vertical artificial drains, of the type comprising a carrier frame, a tool carrying mobile assembly and means fast with the frame for guiding the mobile assembly vertically, characterized in that the mobile assembly comprises a plurality of penetrating tools, particularly for simultaneously laying several drains, and in that said guide means comprise a plurality of guide paths with vertical extension disposed for at least two of them with spacing therebetween.
Thus, with the invention, it is possible to increase the number of drains laid during the same operation, while respecting correct horizontal and vertical positioning of the drains through appropriate guiding.
Advantageously, the guide paths and the penetrating tools are disposed symmetrically with respect to the same vertical axis called guide axis. This arrangement eliminates the cantilever met with in particular in installations equipped with a single guide mast in a lateral position (the weight of the mobile assembly possibly reaching several tons) and, consequently, makes possible the use of a lighter guide structure easier to position on the worksite.
In an advantageous embodiment of the invention, the guide paths are formed by cables, or thin suitably stretched profiles. In a particular variant, the cables are stretched between two spacing structures fixed to the carrier frame. In particular, the frame comprises a platform carrying a pivoting lifting jib, the spacing structures being respectively fixed to the free end of the jib and to the end of a projection of the platform. The use of cables or thin profiles as guide paths facilitates the adjustment and the height and spacing dimensioning of the guide means as a function of the mobile assembly and of the height and spacing of the drains to be laid.
In variants of the invention, guiding of the penetrating tools may be further improved in several ways, particularly by spacing the guide paths apart by a distance close to the elementary spacing provided for the drains and/or by mounting the penetrating tools on a set of cross-pieces themselves mounted for sliding on the guide means.
In another embodiment of the invention, the mobile assembly comprises a driving head, for example a hydraulic vibrator, mounted for sliding on the guide paths and associated with a force transmitter-distributor coupled to the penetrating tools.
BRIEF DESCRIPTION OF THE DRAWINGS
The invention will now be described with reference to the accompanying drawings in which :
FIG. 1 shows a schematic side view of one embodiment of a vertical drain laying machine in accordance with the invention,
FIGS. 2a and 2b are partial schematic front views similar to FIG. 2, showing a rotating drive assembly and a hydraulic drive assembl
REFERENCES:
patent: 2046323 (1936-07-01), DeWolfe
patent: 3365004 (1968-01-01), Johansson
patent: 4745979 (1988-05-01), Morimoto
patent: 4755080 (1988-07-01), Cortlever et al.
Larcheron Gerard
Legendre Yves
Corbin David H.
Enterprises Morillon Corvol Courbot S.A.
Plottel Roland
LandOfFree
Public works machine usable more particularly for laying vertica does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Public works machine usable more particularly for laying vertica, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Public works machine usable more particularly for laying vertica will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-130373