Hydraulic and earth engineering – Bank – shore – or bed protection – Revetment
Patent
1997-01-21
1998-12-01
Bagnell, David J.
Hydraulic and earth engineering
Bank, shore, or bed protection
Revetment
405 19, 405 20, E02B 312
Patent
active
058428127
DESCRIPTION:
BRIEF SUMMARY
FIELD OF THE INVENTION
The present invention relates to revetment systems and is particularly concerned with providing a method of facing embankments such as drainage causeways.
BACKGROUND OF THE INVENTION
Typically the construction of a drainage causeway involves the digging of channel and subsequently the revegetation of the surrounding embankment. The problem with the revegetation procedure is that it takes time for this to occur and in the meantime soil erosion can occur with accompanying degradation of the causeway embankment.
For this reason revetment systems have been utilised and a typical one of these involves the use of concrete bedding which is laid along the embankment, such bedding can be formed by filling a mat with concrete and letting it set. Although this system is an improvement on those which require preformed concrete structures, it still suffers from the problem that once the concrete mat has set it cannot be manipulated, that is bent or folded in any manner so as to adapt the mat to the contours of the embankment on which it is to be used. Thus the mat must be either placed in its desired orientation prior to filling with concrete, or if it is moved, once it is set in a particular configuration the soil of the embankment must be moved to adapt it to the shape of the mat.
SUMMARY OF THE INVENTION
According to the present invention a body is provided having an interior with a plurality of chambers, a plurality of fracture zones and a plurality of filter zones which permit water to pass through opposing exterior surfaces of the body, in use the body interior being arranged to receive a substance which hardens on drying arid fractures at locations defined by the fracture zones.
It is preferred that the body has a plurality of openings interconnecting respective chambers.
The openings may have side barrier portions with respective apex portions arranged opposite each other and defining the fracture zones For creating fractures in setting cement which is to fill the chambers.
Preferably the fracture zones create fractures in a settable substance which is arranged to be pumped into the interior of the body, and the fractures serve to create hardened substance portions in the respective chambers.
Preferably the substance portions created in adjacent chambers are movable with respect to each other.
It is preferred that the fractures which are created in the substance enable the body to be flexible or bendable so that it may be reconfigured to different shapes.
It is preferred that each side barrier portion comprises adjacent straight walls which meet at an apex.
Each chamber may have a plurality of openings.
Each chamber may be defined by a Plurality of boundary portions.
Preferably each boundary portion comprises respective end portions.
Opposing end portions of different boundary portions may be arranged to define an opening.
Each end portion preferably includes a side barrier portion.
Each chamber may have boundary portions which substantially surround an interior portion of the chamber.
Preferably the boundary portions form respective corners of the interior of the chamber.
The boundary portions may comprise two corner portions which extend at an acute angle with respect to each other.
The corner portions may extend at substantially 90.degree. with respect to each other.
It is preferred that the boundary portions of each chamber form a rectangular enclosure forming the walls of the chamber.
Each chamber may comprise four openings.
It is preferred that each opening for a chamber is located in a side of the object formed by the boundary portions of that chamber.
Each opening may be formed inside of the rectangular enclosure forming the walls of each chamber.
It is preferred that each opening is formed substantially midway along each side of the object formed by the boundary portions.
Each opening may be formed substantially midway along each side of the rectangular enclosure forming the walls of each chamber.
Desirably each opening is located between each corner of each chamber
Each b
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Bagnell David J.
Hartmann Gary S.
Revetment Systems Australia (QLD) PTY Ltd.
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