Hydraulic and earth engineering – Bank – shore – or bed protection – Wave or flow dissipation
Patent
1985-09-30
1987-04-14
Husar, Cornelius J.
Hydraulic and earth engineering
Bank, shore, or bed protection
Wave or flow dissipation
52750, 405 25, E02B 304
Patent
active
046574328
DESCRIPTION:
BRIEF SUMMARY
CROSS REFERENCE TO RELATED APPLICATIONS
The present application is a national phase application corresponding to PCT/DE84/00186, filed Sept. 11, 1984 and based upon a German application P3403165.0 of Jan. 31, 1984 under the International Convention.
FIELD OF THE INVENTION
The invention relates to an installation for ground stabilization in hydraulic engineering consisting of mats formed by bars anchorable into the ground at least by their own weight, with artificial grass fixed thereto, wherein the bars are connected to form a mat having meshes.
BACKGROUND OF THE INVENTION
An installation of this kind for the protection against erosion of foundations in river- or marine constructions is known from the German Utility Model 82 31 725.9.
In this known installation, artificial and mainly floatable grass fibers are tied to straight bars anchorable into the ground at least by their own weight, these bars being lowered to the bottom of the water body, thereby not only impeding erosion, but also facilitating the deposition of ground particles carried by the water current.
It is also known from German Utility Model 82 31 725.9 to connect several of the afore-mentioned grass supports by means of traction elements such as chains, with spaces between them, to form a mat and to launch this mat into the water from a boat.
But particularly when the water current is strong there is a risk that during the lowering of the mat consisting of several grass supports, these supports are carried away differently and come to lie upon each other and, as a result, their intended positioning towards each other and the thereby intended effects are not reached.
Also, the production of such installations known to the art is relatively complicated and expensive.
OBJECT OF THE INVENTION
The object of this invention is to improve such an installation in order to achieve through simplification and cost-reduction of the construction an installation with an essentially higher degree of stable positioning of the grass support elements, thereby also creating the possibility of preselecting the most advantageous positioning of the grass supports in each case.
SUMMARY OF THE INVENTION
The solution to this problem is a mat made of structural steel with struts carrying prefabricated and interchangeable bar-shaped grass supports.
Such a mat carrying grass support elements does not permit any displacement of the grass supports with respect to each other, due to the undetachable and rigid connection of its struts. In spite of that, the mat is capable to adjust to a certain degree to the more or less uneven bottom of the water body, when flatly lowered to the ground. Besides, afore-described installation has remarkably lower production costs, since the commonly used structural steel mats can be used in this case.
It is also possible to affix the grass supports to the construction steel mat in a variety of patterns different from each other and in dependence from the respective predominant water current to achieve the best effects.
It is advantageous to the principle of the invention when the structural steel mat has bars perpendicular to each other and in addition the meshes of the steel structure are respectively limited by bar sections of similar length and also when the length of a bar-shaped grass support corresponds approximately to the clearance between bar sections opposite to each other of a mesh of the steel structure.
An embodiment particularly advantageous from the point of view of the production of the grass supports themselves, as well as from the point of view of their connection to the structural steel web and which also ensures a stable positioning of the grass supports towards each other is characterized by that the grass support elements are made of a first trough-like profile bar and of a second bar having at least the same length with the first, surrounded by grass fibers and fitted into the first profile bar and by that on the trough-shaped profile bar elements for the connection to the structural steel web are provide
REFERENCES:
patent: 3323310 (1967-06-01), Arpih
patent: 3727411 (1973-04-01), Rhodes
patent: 4077222 (1978-03-01), Larsen
patent: 4337007 (1982-06-01), Smith
patent: 4374629 (1983-02-01), Garrett
patent: 4478533 (1984-10-01), Garrett
Dunker Friedrich W.
Rentrop Peter W.
Trapp Gunter H.
Dubno Herbert
Hall Kristina I.
Husar Cornelius J.
Joh. Moritz Rump Kommanditgesellschaft
Ross Karl F.
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