SK286526B6 - Grid or lattice container structure for protection against erosion and process for producing a structural unit - Google Patents

Abstract

A grid or lattice container structure is intended for use on a worksite in order to protect against erosion. The container structure comprises lateral walls (11), a top portion (13) forming a cover, a base (12) and an overhanging skirt (14) protruding from at least one lateral wall (11). At least two container structures are placed side-by side so that the overhanging skirt (14) of one of these two structures overlaps at least partially the adjacent container structures. The container structure is being filled with gravel or other building material in site.

Description

Technical field

BACKGROUND OF THE INVENTION 1. Field of the Invention The invention relates to the construction of a container of mesh or lattice for erosion protection and to a method of manufacturing a structural unit on a construction site. The invention has been developed for use in the construction of containers, for example, cages or baskets in an underwater environment, to protect against erosion by water jets, and in particular erosion of river or river banks, water channels and the like, essentially as an alternative to traditional stone embankment protections. The invention can also be used to protect river bridge pillars and to protect the reinforced bottom at the bottom of thresholds or dams and the like.

BACKGROUND OF THE INVENTION

For a long time, prismatic constructions made of double-twisted hexagonal metal mesh, forming a cover, have been used as protective structures to prevent soil erosion. Said structures used in water are preferably formed as a cage with many chambers of metal mesh, divided into compartments of the same type and filled with stones, gravel and the like. They are commonly called multi-chamber baskets and are placed side by side on the bottom of the river bed without any interconnection or connection when the underwater storage operation is performed. Therefore, there is a risk that these multi-chamber baskets are either stowed only at approximate estimation, causing underwater storage problems, or may be relocated at any time to create sufficient space between them to allow the current to erode portions of the bottom which are not protected. Thus, these baskets do not provide a complete guarantee of erosion protection.

From US-A-4 726 708 a construction is known in which the base has an overlap or flange on at least one side.

SUMMARY OF THE INVENTION

It is therefore an object of the present invention to overcome the disadvantages of the prior art by providing an improved product avoiding the aforementioned risk of erosion between these elements. A second object of the invention is to provide a product designed to respond to this need for optimized site commissioning, often performed under difficult conditions. The last object of the invention is to provide a lock of the erosion protection result by designing a reliable and durable solution, with the greatest ease of commissioning and production, while guaranteeing a higher degree of resistance and stability of the protected area complex.

These objectives are achieved by the construction of a erosion-proof mesh or mesh container intended for use on a construction site, the structure being filled with gravel or other building material and having side walls, a cover or an upper part, and in which the base has an overlap based on that the overlap extends on at least two adjacent sides of the base.

Preferably, the overhang is of the same type as the container design.

It is also preferred that the structure is metal or synthetic.

In a further preferred embodiment, the side walls, the upper portion and the base, with the exception of the overlap, form parallelepiped or cage of the basket.

Advantageously, the internal volume of the structure is divided into chambers by interposed walls or partitions.

It is also advantageous if the structure comprises a protective material under the overlap or at least over the overlap to prevent the carrying of the protected subsoil particles below them in the event of a current velocity.

In a method of manufacturing a construction unit at a construction site, the container structure is conveyed to the construction site when it is in a collapsed state, assembled at the construction site and filled with solid material.

In a preferred embodiment, the solid material is maintained in the structure by means of mesh meshes or mesh lattice. The solid fill material is selected from any of the following materials or a mixture of these materials, sand, gravel, aggregate, concrete, soil, stones, clay and the like.

Advantageously, after the at least two different structures have been filled, the at least two different structures are placed side-by-side at the point of commissioning, the overlap of one of the two structures at least partially being overlapped at least partially by the adjacent structure.

The product of the present invention is thus perfectly defined and adapted to be commissioned in an aqueous environment to provide protection against erosion to be carried out under water. This solution is easy to put into operation and has the advantage of ensuring that the baskets are tied together and joined together, while ensuring good protection between the baskets.

Overview of the figures in the drawing

Other features and advantages will be better understood by reference to the following exemplary embodiment and with reference to the accompanying drawing, made exclusively for the example shown, wherein in FIG. 1 is a perspective view of one embodiment of an improved multi-chamber basket according to the present invention; FIG. 2 illustrates a typical use of two improved baskets which are stacked side by side and connected and FIG. 3 shows two baskets of FIG. 2 in an example of separation, caused, for example, by a commissioning error or a shift in use protection.

DETAILED DESCRIPTION OF THE INVENTION

The container or package structure 10, for example, a basket or cage of mesh or lattice comprises a prismatic structure, preferably made of metal mesh, with side walls 11 or panels, with a bottom or base 12 and a cover or top 13. The base 12 has at least one side the overhang 14, and preferably on at least two adjacent sides. The base 12 and its overlap 14 are of the same type and are coated on the bottom or covered with a geotextile or protective material 15 to prevent leakage of the subsoil particles in case of current exposure. The structure 10 is preferably divided into chambers by interposed walls or partitions 16.

According to one embodiment of the structure 10, the base 12 and its overhang 14 are formed by a single rectangular layer having a hexagonal mesh structure, preferably formed with double twist, of metal wire coated with a zinc-aluminum alloy and softened, for example, with PVC or the like. The overhang 14 forms a common part with the base 12 of the structure 10. When the overhang 14 extends on at least two adjacent sides of the structure 10, there are overhangs "right" and overhangs "left" depending on the function of the building layout. All side walls 11a of the compartment 16 are preferably made of double twisted mesh and are joined at the base 12 of the structure 10, if they must be, preferably at the factory.

Also, at least partially, the structure 10 can be manufactured by first folding a single layer of mesh to form a base 12 with its overlap 14 and two opposite sides to overlap 14. In this case, the two side walls 11 connected to the overlap 14 are assembled in the factory by grooving or in a similar way. The upper part 13, independently of the construction of the base 12 and of the side walls 11 and of the compartments 16, is preferably formed by a single layer of mesh. It may, in the case of large rectangular trimmings, be replaced by the role of a mesh having the same mesh size and the same characteristics as the base mesh of the base or wall of the basket.

The geotextile as a protective material 15 is deposited under the overlaps 14 and partially extends below the base 12, which operation can be carried out at the factory by mechanical grooving.

During commissioning, the baskets or cages 10 are filled according to applicable rules to ensure uniform filling and maximum cavity reduction. The multi-chamber baskets can be shaped in various ways, which can also be made possible by bending, overlapping or stacking arches.

The banks, slopes or river banks suitable for protection by overlapping baskets according to the present invention are pre-cleaned, re-profiled and straightened to be free of any recesses or bumps, branches, stumps and the like. In over-excavated areas, localized restoration may be undertaken, if necessary, taking into account the uniformity of the subsoil.

For water work, baskets of structure 10 are assembled, filled and sealed on the ground in an open area for pre-production intended for this purpose. In a second stage, the baskets of the structure 10 are transported and transported to their final installation. Particular care is also taken to level the overlaps 14 on the ground without damaging the geotextile at the bottom. To prevent lifting and entrainment of the fine particles under the baskets of structure 10 caused by residual hydraulic action, a geotextile nonwoven filter of known type is inserted between the substrate and the basket or any other method having the same function is selected. This geotextile is placed in a pre-filled cage which is made using predetermined materials, followed by a manual final surface arrangement.

Once the baskets of structure 10 have been filled, loose cover closures are set and positioned above the respective baskets closures. To attach the covers, the edges of the perimeter (with special care at the corners) and then of the compartments are first grooved.

The structures 10 are then transported to the place of commissioning by suitable means which can be designed so that the handling of the baskets does not cause deformation or causes only slight deformation of the structure and that each basket is lifted at multiple points without risk of wire damage or elevated labor costs for metal wires. For example, the filled structure may be displaced by means of a rocker or other known handling means suspended on a lifting belt-type lifting device or other means to distribute the load on the basket.

The baskets of structure 10 are then put into operation and stacked side by side in an underwater environment so that the spaces between each baskets of structure 10 are best defined in their final location. It must be ensured that the overlap 14 of each basket of the structure 10 is overlapped by the cage of the adjacent basket (Fig. 2).

When the current separates two adjacent baskets of the structure 10, the area 17 between them (Fig. 3) remains protected by an overlap 14, preventing the erosion of the river bed under the geotextile as a protective material 15. In this situation, the corrosion protection between baskets is ensured by the overlap 14.

It goes without saying that those skilled in the art may bring various modifications and variations to the apparatus which has just been described for the purpose of a limiting example without departing from the scope of the invention.

Claims (11)

PATENT REQUIREMENTS by, by overlapping the same same this structure is the skin side walls (11), upper An erosion protection mesh construction of a container for use in a construction site, the structure (10) being filled with gravel or other building material and comprising side walls (11), a cover or an upper part (13), and in which the base (12) has an overlap (14), characterized in that the overlap (14) extends on at least two adjacent sides of the base (12). Container construction according to claim 1, characterized by pu as a container construction. Container construction according to claim 1, characterized by beige or synthetic. Container construction according to claim 1, characterized in that the part (13) and the base (12), with the exception of the overlap (14), form parallelepiped or cage cages. Container structure according to any one of claims 1 to 4, characterized in that the internal volume of the structure is divided into chambers by interposed walls or partitions (16). Container construction according to any one of claims 1 to 5, characterized by a protective material (15) below or at least overlap (14) to prevent the carrying of the protected subsoil particles below it in the event of a current velocity. Method for manufacturing a construction unit on a construction site, characterized in that the construction of the container according to any one of claims 1 to 6 is delivered to the construction site when it is in a collapsed state, assembled on the construction site and filled with solid material. Method according to claim 7, characterized in that the solid material is maintained in the structure by means of mesh meshes or a grid lattice. A method according to claim 7, characterized in that the protective material is applied to the structure after it has been assembled at the construction site, the solid material being maintained in the structure by the protective material. The method of claim 7, wherein the filler material is selected from any of the following materials or a mixture of these materials, sand, gravel, aggregate, concrete, soil, stones, clay and the like. Method according to claim 7, characterized in that, after the at least two different structures (10) have been filled, the at least two different structures (10) are placed side by side at the point of their commissioning, wherein the overlap (14) of one of the two of the structures (10) at its final location overlaps at least partially with at least a part of the adjacent structure (10).