JP2000319843A - Submarine structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a submarine structure having excellent maintainability installed by stacking a number of wire cage cylinders filled with stones so-called wire cylinder or gabion as the measures for preventing coastal erosion. SOLUTION: Anti-rubbing members 7 are placed near the top surfaces 1a of wire cylinders filled with stones, the whole of a pile A1 of wire cylinders filled with stones stacked on the sea floor is covered with a net-shaped body 8, and the net-shaped body 8 is fixed to wire cylinders filled with stones 1 and the sea floor, also a number of the single units of wire cylinders filled with stone are covered and fixed with a reverse box-shaped net-shaped bodies thereby making the pile A1 of the wire cylinders filled with stones 1, the sea floor and the net-shaped bodies 8 in one united body together with a pile of wire cylinder single units stacked on the sea floor functioning as a submarine structure.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a packing basket for forming an underwater structure such as a jetty, a submerged levee, a breakwater and a breakwater mainly installed on the seabed in a coastal area.

[0002]

2. Description of the Related Art Conventionally, when constructing a gravity type underwater structure such as a jetty, a submerged embankment, a breakwater, and a breakwater, as a relatively inexpensive simple method, a rubble stone method and a filling stone basket method are used. First, the rubble stone method is the simplest method of putting broken stones or boulders into the sea floor in a loose state. Had the problem of being scattered in all directions under the influence of the above. On the other hand, in the case of the filling stone basket method, a basket made of wire mesh called so-called futon basket and gabion is packed with broken stones or cobblestones and stacked up to the required height on the seabed. ,
It is considered to be an advantageous construction method in terms of construction period, workability, construction cost, reliability, etc. Therefore, recently, when constructing gravity type underwater structures such as jetties, submerged embankments, breakwaters and breakwaters,
In many cases, the packing method is used. However, in a cage made of wire mesh, which is usually made of a galvanized iron wire material, the cage swells outward due to the pressure of the fill stone, and the wire mesh on the side surface of the basket is necessarily distorted. In addition, wire mesh baskets, after sinking in the sea, have abrasion due to sand drift and problems during the wire mesh manufacturing process. There is a fatal drawback that the cage collapses due to waves and tides, leaving only the lines of force as the cage frame, and the stones in the cage are washed away and scattered. As a countermeasure, packing baskets made of wire mesh that has been subjected to processing such as aluminum plating or plastics coating on iron wire have emerged.However, packing baskets made with these wire meshes are extremely expensive, and wire mesh Inevitably occurs during the braiding process, that is, damage to a part of the iron wire due to twisting and bending of the iron wire, and various types of friction generated during filling work, holding the basket horizontally, lifting work, etc. For rubbing etc.
It is in the current situation where the expected durability cannot be achieved.

[0003]

A wire mesh packing basket such as an ordinary futon basket or a gabion is made of a braided iron wire whose surface is mostly galvanized. ,
Apart from the force lines as the basket frame, the wire mesh part is forcibly twisted and bent at an acute angle by the machine during the braiding process, so the zinc wire on the surface of the iron wire The plating layer is partially damaged, and the crystal structure of the metal inside the iron wire changes due to torsion and sharp bending, and the potential difference between the iron wire and the surface of the bent part and the surface of the straight part become the anode and cathode, respectively. Therefore, in seawater, since seawater becomes an electrolytic solution, the metal is ionized from the bent portion serving as the anode, and electrochemical corrosion due to dissolution occurs.
Therefore, in an early case, a breakage caused by corrosion and breakage of the bent portion occurs in use for about 2 to 3 years, and the wire mesh portion can no longer maintain its shape, and as shown in FIG. Only the line is left, and eventually the basket collapses, and the stones in the basket are washed away and scattered, losing its function as an underwater structure.

[0004]

According to the present invention, in order to solve the above-mentioned problems, an anti-friction material is previously placed on a predetermined place near the upper surface of a wire mesh packing basket such as a futon basket and a gabion basket. After placing it so that it does not shift, the entire pile of packed stone baskets is covered with a corrosion-resistant mesh made of a material such as synthetic fiber or synthetic resin, and any part of the mesh is packed with the basket and the sea floor. In addition, the upper surface and all sides of a large number of wire mesh baskets are covered with a mesh of synthetic fiber or synthetic resin, and any part of the mesh is fixed to the basket. Therefore, the clogging basket and the mesh are integrated, and the clogging basket and the mesh are each integrated.

[0005]

As a conventional undersea structure, a wire mesh packing basket installed in a state of being stacked on the sea floor is 3
~ 4 years later, the accidental spilling of stones from broken nets due to the corrosion and breakage of the wire mesh that inevitably occurs in the cage,
The pile of packed stone baskets is a mesh made of material such as synthetic fiber or synthetic resin, and the top and all sides of the packed basket are corrosion-resistant mesh made of material such as synthetic fiber or synthetic resin. Thus, it is possible to completely prevent each of them by fixing and covering them with the mesh.

[0006]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. FIG.
As an example embodiment of the present invention, while indicating underwater construct A state in which the mountain A ₁ of pallet cage 1 stacked on the seabed is installed substantially in a predetermined shape, packed stone basket 1 Upper surface 1a of
Even if a portion of the wire mesh 4 formed of the nearby iron wire 5 is broken due to damage due to electrochemical corrosion or the like, it is thicker than the predetermined portion of the packing basket 1, that is, the iron wire 5 constituting the wire mesh 4. For example, synthetic fibers or synthetic fibers which are covered and fixed to the force lines 5a or the like as a strong cage frame by, for example, binding and hitting and fixing the covering wire fixing material 9 and the pile-shaped fixing material 10 to the seabed. It is blocked by the corrosion-resistant net 8 made of a material such as resin. Therefore,
As shown in FIG. 4, an accidental loss of the filling stone 6 including the broken stone 6a and the cobble stone 6b packed in the basket 1, which is generated in the conventional underwater structure A, is prevented. And Kutsugae設the entire mountain A ₁ of pallet cages, as described above, mesh-like body 8 to be used in the present invention the sea construct A in a fixed state in any position of the pallet cage 1, the upper surface of the pallet cage 1 At a predetermined location near 1a, an anti-friction material 7
The from being placed not to lateral displacement, Bokosu member 7 becomes the cushion, it hindered contact with the mountain A ₁ of the pallet cage,
Even if there is a broken portion due to the electrochemical corrosion of the wire mesh 4, ie, the iron wire 5, which forms the packing basket 1, the wire mesh 4 is protected. Further, in the case of another embodiment of the present invention shown in FIG. 2, the upper surface 1a 'of the packing basket 1' made of wire mesh 4 'alone.
In addition, all the side surfaces 1b 'are made of a material such as synthetic fiber or synthetic resin having excellent corrosion resistance and the upper surface 8a and all the side surfaces 8b.
By covering with an inverted box-shaped mesh member 8 ′ made of the following, and fixing an arbitrary portion of the mesh member 8 ′ to the force line 5 a ′ of the stuffed stone basket 1 ′ with, for example, a fixing member 9 ′ of the covered wire. Since the filling stone basket 1 'and the mesh body 8' are integrated via the force lines 5a ',
In the same manner as described above, the spilling accident of the packing stone 6 ′ from the broken portion caused by the rubbing of the wire netting 4 ′ with the packing stone 6 ′, etc. It is blocked and prevented by the overlaid net 8 '.
The procedure for manufacturing the packing baskets 1 and 1 'of the present invention shown in FIGS. 1 and 2 includes the upper surfaces (covers) 1a and 1a of the empty baskets 1 and 1' on land. Open 1a ', basket 1,1'
Inside, the stuffed stone 6,6 'of moderate size, that is, the split stone 6a, 6
a 'or cobblestones 6b, 6b', etc., are manually packed with a shovel car or the like to maintain the shapes of the cages 1, 1 'and serve as a basket frame arranged for reinforcement. Force line 5
The packing baskets 1 and 1 'are formed by binding and fixing the upper surfaces (lids) 1a and 1a' to the a and 5a '. Incidentally, in the case of the other embodiment of the present invention shown in FIG.
As shown in FIG. 3, it is formed by covering and fixing an inverted box-shaped net 8 'comprising an upper surface 8a' and all side surfaces 8b '. Further, as another embodiment of the present invention, an anti-friction material is directly placed at a predetermined location near the upper surface 1a 'of the stuffed stone basket 1', and then the inverted box-shaped net-like body 8 'is covered and fixed. As a result, the anti-friction material serves as a cushion, and the mesh-like body 8 'is prevented from contacting with the stuffed stone 6' in the basket 1 ', and a wire breakage portion is generated in the wire mesh 4' constituting the stuffed stone basket 1 '. Even if it does, the protection of the mesh body 8 'fastened to the force line 5a' is remarkably improved by the covering wire fixing material 9. The above, FIG.
One example of the embodiment of the present invention shown in FIG. 2 and other embodiments are:
The stuffed stone baskets 1, 1 ', ie, the Futon baskets 2, 2' and the gabions 3, 3 ', etc., are lifted by a heavy machine such as a crane, then transported sideways, and further loaded on a barge to a predetermined coastal area. It is transported and sunk on the sea floor. The reticulated bodies 8, 8 'are damaged by rubbing with the packing stones 6, 6' and the wire netting 4, 4 'and the iron wire 5, 5', and in particular, protruding nodules of the knotted net which is considered to be weak. In order to prevent damage to the part, it is preferable to form a knotless network. If the bottom of the seabed is unstable or if the tide is severe and scouring occurs, the submerged structure A consisting of the stacked packing baskets 1 and 1 'may be buried or fall down. In some cases, a burying / falling prevention sheet or the like is laid, and then the mountains A ₁ and A ₂ of the packing stone baskets 1 and 1 ′, that is, the underwater structure A, are laid on the sheet or the like. FIG. 1, that is, a packing basket 1 as an example of an embodiment of the present invention, after being stacked and installed on the seabed in a predetermined coastal area, is made of synthetic fiber or synthetic fiber having a predetermined mesh and thread diameter excellent in corrosion resistance. the entire mountain a ₁ of pallet cages with mesh body 8 made of a material such as resin from the Kutsugae設, the fixing member 9 and the seabed of any portion of the mesh body 8 in the mountain a ₁ of pallet cages example coated wire Although the pile-shaped fixed member 10 in which formed by fastening the fixed and tapping fixed, as a concrete method for coating the mesh body 8 to the entire mountain a ₁ of the pallet cage, firstly, divers are stacked on the seabed was confirmed mountain a ₁ of packed stone basket, then submerged in the sea the mesh-like body 8 of a folded state, and stretched the mesh-like body 8 on the sea floor, check the center mark of the mesh-like body 8 (not shown) since, in accordance with the position of the center mark in the vicinity of the apex of the mountain a ₁ of the substantially packed stone basket, mountain a ₁ whole of packed stone basket The mesh body 8 after stretched in all directions, the mountain A of pallet cages the predetermined portion of the mesh body 8 and the pallet cage 1
₁ from above, the force lines 5a are sequentially tightened and fixed with the covering wire fixing material 9 and the net-like body 8 and the seabed are beaten and fixed to the pile-like fixing material 10 to thereby form a pile of packed stone baskets. installation work of a _1, that underwater construct a is completed. In the case of the present invention shown in FIG. 1, in order to further enhance the effect of preventing the mesh member 8 from rubbing, for example, a required number of auxiliary floats (not shown) are attached to an arbitrary position on the upper surface of the mesh member 8, and the mesh member is always meshed. It can be expected that the body 8 will be in a floating state. Next, as shown in FIG. 2, in the case of another embodiment of the present invention, in a land operation, a box-shaped net-like body 8 'is already covered and fixed to the packing basket 1' as shown in FIG. Therefore, just like the conventional laying work, simply fill the basket 1 '
The lifting crane or the like heavy equipment, just sinking into the seabed in a predetermined coastal, in which installation work of pallet cage 1 'single mountain A ₂ i.e. underwater construct A is to complete.

[0007]

According to the present invention, even if an underwater structure consisting of a wire cage made of wire mesh and stacked on the seabed is damaged, the undersea structure can be protected by a covered net. A durable undersea structure that prevents accidental spillage and scattering of stuffed stones in a basket and protects the mesh body by using anti-friction material previously placed at a predetermined location near the top surface of the packed stone baskets Can be provided.

[Brief description of the drawings]

FIG. 1 is a partially cutaway perspective view showing an example of the submarine structure of the present invention.

FIG. 2 is a partially cutaway perspective view showing another example of the submarine structure of the present invention.

FIG. 3 is a cutaway perspective view showing a packing basket alone covered with a net-like body which is a basic structure of the undersea structure of the present invention shown in FIG. 2;

FIG. 4 is a partially cutaway perspective view showing a state of an underwater structure in which conventional packed stone baskets are stacked.

[Explanation of symbols]

1, 1 '. Packed stone basket 1a, 1a '. Top surface of packed stone basket 1b, 1b '. All sides of packed stone basket 2, 2 '. Futon basket 3, 3 '. Gabion 4, 4 '. Wire mesh 5, 5 '. Iron wire 5a, 5a '. Lines of force 6, 6 '. Filling stones 6a, 6a '. Split stone 6b, 6b '. Cobblestone 7. Anti-friction material 8, 8 '. Corrosion resistant mesh 8a '. Upper surface of the mesh body 8b '. All sides of the mesh 9, 9 '. Wire-shaped fixing material 10. Pile-shaped fixing material A. Submarine constructs A ₁ , A ₂ . Packed stone basket mountain

Claims (1)

[Claims] In an underwater structure formed by stacking a large number of wire mesh baskets in order to prevent coastal erosion, an anti-scratch material is previously provided at a predetermined location near the top surface of the basket. And place the entire pile of packed stone baskets on the seabed with a corrosion-resistant mesh, then fix any part of the mesh to the packed basket and the seabed. By covering the wire mesh basket alone with an inverted box-like mesh with excellent corrosion resistance, the pile and the seabed of the basket are integrated with the mesh, respectively. An underwater structure characterized by being composed of piles of packed stone baskets alone.