Classifications

• • E—FIXED CONSTRUCTIONS
  • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
  • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
  • E02D17/00—Excavations; Bordering of excavations; Making embankments
  • E02D17/20—Securing of slopes or inclines

Definitions

• the present invention relates to a new type of coating making it possible to ensure the protection of the soil against erosion and intended more especially for the edges of rivers, canals, rivers or lakes as well as for inclined planes where a supply of pulverulent material ( earth) is required.
• the oldest technique using the reuse of the existing soil consists of stacking bags of earth or sand.
• the invention therefore relates to a protective coating against erosion of the type constituted by a honeycomb structure, in the form of a honeycomb, attached to the ground that one wishes to protect, and this so that the walls of the cells are arranged perpendicularly to the latter, and form a partition which, after placement on the ground, is filled with a filling material preferably consisting of the soil of the site on which the structure is placed place, and which is characterized in that the upper and / or lower face of said honeycomb structure is covered and reinforced by a flat, flexible structure, secured to the edges of the cells and formed at least by a metallic mesh and / or synthetic material .
• the mesh associated with the honeycomb structure will be designated by the expression "metal mesh”, it being understood that this is not limiting and that any equivalent structure, for example a plastic mesh, could be used.
• the metal mesh is itself associated with a geotextile.
• a geotextile can be constituted by a textile grid, the mesh of which is finer than that of the mesh and / or by a fibrous sheet, consisting for example of continuous filaments, of synthetic material, which thus constitute a flexible, deformable surface covering element. , closing the days presented by the metal grid and the textile grid.
• a grid made up of either annealed mild steel wires, preferably with very rich galvanization, can be used, these wires possibly being coated with a sheath based on polyvinyl chloride (PVC).
• PVC polyvinyl chloride
• a metal mesh associated with a geotextile When a metal mesh associated with a geotextile is used as a cover and reinforcement element, the combination of these two elements can be done either by means of metal staples or, in the case where the metal grid includes a sheathing made of PVC, by hot calendering at the softening temperature of PVC.
• the coating according to the invention comprises on either side of the honeycomb structure, a flat reinforcing structure which, in the following description, will also be designated by the expression "skin", both “skins” being identical, it can however be envisaged to produce complexes different from one another, for example to use for the lower face in direct contact with the ground a simple textile sheet such as woven or nonwoven, and not an armed complex comprising a metallic grid as for the upper layer (or vice versa). Likewise, for certain applications, it can also be envisaged to have only a single flat structure of cover and reinforcement comprising a metal grid, secured either to the upper edges of the honeycomb-shaped honeycomb structure, or on the underside of said honeycomb structure.
• a protective coating according to the invention makes it possible not only to obtain a resistant, stable assembly, having very good resistance over time, without the stiffness of the reinforcing element altering the vegetation by degradation of the stem. or plant roots.
• the aforementioned structure will include, incorporated from place to place inside the cells of the honeycomb structure, reinforcements which connect them the two outer skins.
• These reinforcements are advantageously constituted by an additional rigid structure having a circular, parallelepiped shape or the same shape as the cells and which can be inserted inside the latter.
• This additional structure is constituted for example by a welded wire mesh.
• connection of the outer skins to the lower and / or upper peripheral edges of the cells of the honeycomb structure will be carried out by any suitable means, such as for example by suitable stapling.
• FIGS. 1a and 1b illustrate diagrammatically , in perspective, the structure of a protective coating according to the invention before placing and filling the cells, and one of the faces of which is associated with a reinforcement constituted by a metal mesh constituting a flexible and deformable closure ( figure la), possibly himself
• FIG. 2 is an exploded perspective view showing the different constituents of a coating produced according to the invention, the filling material not being shown;
• FIG. 3 is a perspective view illustrating the manner in which a vertical reinforcement is incorporated, incorporated inside a covering in accordance with the invention, the external covering of which consists of a metallic grid complex plus geotextile;
• FIG. 4 is a schematic view showing how the various constituents of a coating of
• the protective coating against erosion according to the invention therefore consists essentially of a structure
• C alveolar designated by the general reference (1) and which is attached to the ground (S) that one wishes to protect, so that the walls (2) of said cells are arranged perpendicular to the latter.
• This honeycomb structure is advantageously constituted by a nonwoven textile web but could possibly be produced from strips r "of plastic material.
• the strips are linked together by any suitable means such as gluing, sewing.
• the cells are preferably hexagonal, have a height which can be between 5 and 30 cm, the length of each side being of the order of 10 to 40 cm.
• These cells form a partition which, after installation on the ground of the complex, is filled with a filling material preferably consisting of the ground of the site on which the structure is placed.
• the lower and / or upper face of said honeycomb structure is covered with a metallic mesh (7), constituting a flexible and deformable closure, possibly associated - • with a geotextile (G) and which makes it possible to close the cells.
• a metallic mesh (7) constituting a flexible and deformable closure, possibly associated - • with a geotextile (G) and which makes it possible to close the cells.
• 2n cellular (1) being secured, for example by staples (6) adapted to this planar structure.
• the cells are then filled, for example with soil (3) taken from the site and, after leveling, a second flat complex (4) is attached to the upper surface in order to close said cells, this complex also being secured to the edge upper j r- of said cells.
• a coating is thus obtained as shown diagrammatically in FIG. 4.
• the lower structure or skin (5) and / or the upper structure or skin (4) comprises a metallic or metalloplastic grid (7), for example made of galvanized steel wire coated with PVC.
• This grid is preferably obtained according to the double or triple twist technique, making it possible to obtain meshes of dimensions D as illustrated in FIG. 2 of 50, 60, 80 or 100 mm.
• the metal wire constituting the mesh and whose stiffness is adapted to the problem to be solved is made of annealed mild steel, with very rich galvanization and is optionally coated with a PVC sheathing.
• this metallic mesh can be associated a geotextile (G) of woven type (8) with smaller meshes than those constituting the metallic mesh (7).
• G geotextile
• the two materials are combined by hot calendering.
• Such a textile grid (8) can be based on any thread having a melting point higher than that of the sheathing material of the metallic grid (7), for example being in polyester thread or in glass thread.
• This textile grid (8) is preferably also associated with a fibrous sheet (9) (shown only in FIG. 2), made up of continuous filaments, of synthetic material, which constitute a flexible, deformable closure, on the days that the grid presents.
• textile (8) and the metallic grid (7) double twist of hexagonal shape.
• the fibrous structure (9) it is possible, for example, to use a nonwoven obtained from a bundle of polyester filaments deployed and not mechanically needled, such a material making it possible to obtain a flexible, also transparent closure of the meshes of the metal grids. (7) and textile (8).
• the lower face or skin (5) of the structure according to the invention which is in contact with the ground, advantageously has the same structure as the upper skin (4), it can however be envisaged, to produce this lower skin, using a metallic, plastic mesh or a simple textile sheet such as a fabric or nonwoven and not a reinforced complex as for the upper layer (4).
• connection of the upper skin (4) (see FIG. 4) is carried out as for the lower skin (5), by means of staples (6), for example made of galvanized or stainless steel.
• the stapling operation is facilitated by using as a ventilated textile sheet (9) in the complex (4) forming the upper skin, a transparent sheet which allows the edges of the honeycomb surface to be seen.
• reinforcements (10) which connect the two outer skins together and which prevent any movement of said skins relative to each other in the direction of the plane.
• reinforcements are constituted by an additional structure (10), rigid, having a cylindrical, parallelepipedal shape or preferably having the same shape as the cells and which can be inserted inside the latter.
• such a reinforcing element (10) is constituted by a welded wire mesh.
• reinforcement elements can be distributed at a variable frequency between l / m2 up to 1/5 to 10 m2 and this, depending on the slope, the nature of the soil contained and the laying technique. .
• Such an element acts as a conventional bracing in a metal assembly at the same time which immobilizes, according to the frequency that has been chosen, the honeycomb relative to the two skins (4) and (5).
• the reinforcing element (10) can moreover comprise vertical wires, for example in each angle, which protrude and which form "spikes" (12) situated on either side, which can be folded down to mobilize external skins (4,5) or which can be fixed on the support which receives the device thus enabling it to hold better.

Landscapes

• Engineering & Computer Science (AREA)
• Mining & Mineral Resources (AREA)
• Life Sciences & Earth Sciences (AREA)
• General Life Sciences & Earth Sciences (AREA)
• Paleontology (AREA)
• Civil Engineering (AREA)
• General Engineering & Computer Science (AREA)
• Structural Engineering (AREA)
• Revetment (AREA)
• Pit Excavations, Shoring, Fill Or Stabilisation Of Slopes (AREA)
• Floor Finish (AREA)
• Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications (AREA)

Priority Applications (1)

Applications Claiming Priority (2)

Publications (1)

Family

ID=9464668

Family Applications (1)

Country Status (8)

Cited By (4)

Families Citing this family (2)

Citations (6)

• 1994
  • 1994-06-21 FR FR9407850A patent/FR2721334B1/fr not_active Expired - Fee Related
• 1995
  • 1995-06-20 IL IL11423395A patent/IL114233A0/xx unknown
  • 1995-06-20 PE PE1995271829A patent/PE28896A1/es not_active Application Discontinuation
  • 1995-06-21 WO PCT/FR1995/000822 patent/WO1995035417A1/fr active Application Filing
  • 1995-06-21 HR HR9407850A patent/HRP950356A2/hr not_active Application Discontinuation
  • 1995-06-21 AU AU27985/95A patent/AU2798595A/en not_active Abandoned
  • 1995-06-21 ZA ZA955137A patent/ZA955137B/xx unknown
  • 1995-07-06 TW TW084217729U patent/TW296734U/zh unknown

Patent Citations (6)

Non-Patent Citations (2)

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