Hydraulic and earth engineering – Earth treatment or control – Shoring – bracing – or cave-in prevention
Patent
1995-08-03
1997-03-04
Graysay, Tamara L.
Hydraulic and earth engineering
Earth treatment or control
Shoring, bracing, or cave-in prevention
405262, 405286, F02D 2902
Patent
active
056072627
DESCRIPTION:
BRIEF SUMMARY
The present invention relates to retaining wall blocks for use with geogrid reinforcement materials.
Geogrid reinforcing materials take many forms but are typically textile netting or extruded or extended sheets of non-biodegradable material such as terylene or plastics material.
Geogrid reinforcement materials are used in civil engineering construction work such as landfill or landscaping to anchor large volumes of earth. Geogrid reinforcing materials are typically laid horizontally as the earth is being filled in layers and are spaced vertically at distances ranging from about a quarter of a metre at the bottom of an infill to about one and a half metres at the top. However, their use can be limited in certain areas of construction because of erosion by natural elements for example, sea, rain, rivers: by man-made action such as road traffic spray or by the need to restrict the batter or wall face angle due to the nature of the land use. In such situations the use of a hard face wall as part of a geogrid reinforced structure is highly desirable from functional, practical and aesthetic standpoints.
Accordingly, there is a need to provide a method of anchoring geogrid reinforcing material in a retaining wall.
WO91/19057 describes a retaining wall block having a projection formation on its upper surface for engaging a recess in a block above and for engaging an aperture cut into a geogrid material.
EP-0067551-A describes a retaining wall comprising courses of blocks, each block comprising at least one upwardly extending anchoring element over which is placed a link which has a hook by which a geogrid material is held.
U.S. Pat. No. 4,824,293 describes a retaining wall panel with a preformed channel therein communicating through a slit formed between the channel and a face of the panel. Using an enlarged rod, an edge longitudinal rib of a geogrid material can be wedged in the channel thereby holding it in place.
According to the present invention, there is provided a retaining wall block provided with means adapted to receive and retain a geogrid reinforcing material, wherein the geogrid receiving and retaining means comprises a plurality of projections provided on a first face of the block and an aperture or recess provided on the opposite face of the block; characterised in that the dimensions of each projection and the spacing between adjacent projections are selected to correspond to those of the apertures in the geogrid material such that in use, the geogrid locates over the projections with each projection mating with a corresponding aperture of the geogrid material.
Typically, a single row or a matrix of projections is provided.
Typically the projections are provided on the upper surface of one block, locating in an aperture or recess provided in the base of a vertically adjacent block.
Typically, the projections are provided further towards the rear of the block than is the aperture or recess of the block, thereby producing in an assembly of such blocks a front wall batter angle of greater than 0.degree..
In an alternative embodiment of the present invention the edge of a sheet of geogrid material is received in a transverse groove formed in an upper surface of a retaining wall block. To assist in retention of the geogrid material the groove is preferably provided with a rearwardly directed slope.
In an alternative arrangement of the present invention the geogrid reinforcing material receiving means comprises a groove provided in the rear wall of a block, the groove terminating in the interior of the block in a cavity of greater dimensions than the groove. Typically the groove and cavity are formed within the body of a single block. Alternatively, the groove and aperture may be formed between two vertically adjacent blocks.
Typically a clip is provided to assist in the retention of geogrid material in the cavity, the clip attaching to an edge of the geogrid thereby enlarging the dimensions of the edge such that it cannot be withdrawn from the cavity through the groove. The retaining clip may typically
REFERENCES:
patent: 2011531 (1935-08-01), Tranchell
patent: 4324508 (1982-04-01), Hilfiker et al.
patent: 4616959 (1986-10-01), Hilfiker
patent: 4661023 (1987-04-01), Hilfiker
patent: 4815897 (1989-03-01), Risi et al.
patent: 4824293 (1989-04-01), Brown et al.
patent: 4936713 (1990-06-01), Miner
patent: 5044834 (1991-09-01), Janopaul et al.
patent: 5064313 (1991-11-01), Risi et al.
patent: 5145288 (1992-01-01), Borcherdt
patent: 5417523 (1995-05-01), Scales
patent: 5511910 (1996-04-01), Scales
Fountain Holding Ltd.
Graysay Tamara L.
Lagman Frederick L.
LandOfFree
Retaining wall block for use with geogrids does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Retaining wall block for use with geogrids, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Retaining wall block for use with geogrids will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2141734