JP4702700B2 - Overtopping prevention device - Google Patents

Description

  The present invention relates to an overtopping prevention device that is provided on a traffic route along a coast and prevents overtopping.

  On roads provided along the coast, such as roads and railway tracks, high waves may pass over the revetment as typhoons pass, which may adversely affect traveling vehicles. Such overtopping is a situation where the sea surface rises and gravel grabs and overflows into the road, or the water level rises to the level of the revetment and waves are driven into the road.

  In order to prevent such overtopping, there is a wave-breaking block installed in the sea, and a wave-proof shape that extends along the shore and protrudes offshore so that waves coming from the offshore side rebound to the upper part of the offshore wall surface. A wave-proof structure (for example, Patent Document 1) has been proposed.

  In order to provide a wave-dissipating block and a wave-proof structure as described above, there is a problem that material costs and construction costs increase.

By the way, in order to prevent damage caused by avalanches and landslides on the roads at the mountains, snow shed or rock sheds are provided with protective structures (for example, Patent Document 2 and Patent Document 3), and roads along the coast are provided. In the installed one, there are places where waves enter the road from between the pillars and are affected by overtopping.
JP 2003-82636 A Japanese Patent Laid-Open No. 2-80703 Japanese Utility Model Publication No. 60-154212

  In the protection structure with columns as described above, it is conceivable to arrange the plate material between the columns as a measure against overtopping. However, simply attaching the plate material is likely to break due to wave force, and the durability is inferior. is there.

  Then, an object of this invention is to provide the overtopping prevention apparatus which can reduce wave force effectively.

According to a first aspect of the present invention, in the overtopping prevention device provided on the traffic road along the coast, a protective surface made of a synthetic resin net provided on the coast side of the traffic road, and an installation means for installing the net are provided. The installation means are columns arranged along a traffic route, the nets are stretched between the columns to provide the protective surface, the left and right ends of the adjacent nets are connected to each other, At least one of the end portions is sandwiched and fixed between the sea side front surface of the pillar and a plate-like presser material fixed to the front surface, and an oblique rope material is arranged in an intersecting direction between adjacent pillars. is there.

  According to a second aspect of the present invention, the nets having different mesh sizes are overlapped.

  According to a third aspect of the present invention, the network is a knotless network.

  According to a fourth aspect of the present invention, the pillar supports a roof covering at least a part of the traffic path.

According to the configuration of the first aspect, a protective surface is formed by installing a net on the installation means, and the protective surface made of the synthetic resin net can receive waves on the surface and reduce the wave force. Moreover, by using a synthetic resin for the net, it is superior in durability to seawater compared to steel. Furthermore, since the net made of synthetic resin has flexibility, it can be made compact by winding it at the time of carrying in, and at the same time, the workability on site is also improved. In addition, a protective surface can be easily provided by stretching a net between columns by sandwiching it between a plate-shaped presser material and a column, and wave forces received on the protective surface are alleviated by each net Can be reduced. Further, by arranging the diagonal rope members between the adjacent columns in the crossing direction, even if wave force is applied to a part of the net, the entire net is deformed and the wave force can be effectively absorbed.

  Moreover, according to the structure of Claim 2, gravel caught in the wave etc. can be caught with the mesh of a small mesh, and a wave force can be absorbed efficiently with a thick mesh of a large mesh.

  Further, according to the configuration of claim 3, since the wire constituting the net is formed straight without being tied at the intersection, when force is applied to the net, the force is dispersed throughout the net, High wave power absorption effect is obtained. Also, in the knot network, when the wire is tied at the crossing part, the tensile force concentrates on the tip of the crossing part, so that part tends to be weak, but this problem is not a knotless network, and high wave force absorption function can get.

  Moreover, according to the structure of Claim 4, the protection surface which consists of a net | network can be installed using the pillar of the protection structure provided with the roof which covers at least one part of a traffic path.

  Preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. The embodiments described below do not limit the contents of the present invention described in the claims. In addition, all of the configurations described below are not necessarily essential requirements of the present invention. In each embodiment, an unprecedented overtopping prevention device is obtained by employing a different overtopping prevention device, and the overtopping prevention device is described respectively.

  Hereinafter, a first embodiment of the overtopping prevention device of the present invention will be described with reference to FIGS. As shown in FIG. 3, the concrete rock shed has a roof 3 along a mountain Y, in which a plurality of main girders 1 are united together by a PC steel material 2 for lateral fastening facing the length direction of a road M as a traffic path. The main girder 1 is pretensioned by a PC steel material 4 facing in the traffic road width direction, and tension is applied to both sides of the roof 3 in the traffic road width direction on the sea side on the sea U side. It is placed on a pillar 5 as a support body and a wall body 6 as a mountain side support body, and both sides in the width direction of the roof 3 are connected to the pillar 5 and the wall body 6 respectively. Is erected on the foundation at predetermined intervals.

  And the protective surface 7 is provided by the net | network 11 between these pillars 5,5 ... using the said pillar 5 as an installation means. In the figure, 8 is a revetment made of concrete or the like, and the pillar 5 is erected.

  First, the structure of the net 11 used in the present invention will be described with reference to FIGS. 5 to 8. The net 11 is a penetration type unconnected reinforcing net made of a synthetic resin. For example, a plurality of fiber yarns 12 and 12A made of synthetic resin are twisted. Together, the wire rods 13 and 13A are formed. These wire rods 13 and 13A form a crossing direction, and are fixed to each other at the crossing portion 14 by unconnected bars. There is a Russell type for the knotless net, but a penetration type is preferably used. FIG. 5 is an explanatory view for explaining the structure. As shown in FIG. 5, at the intersecting portion 14 of the wire rods 13 and 13A, the ring portion 15 formed by a gap between the fiber yarns 12 and 12 of the one wire rod 13 is formed. By inserting the fiber yarns 12A and 12A of the other wire rod 13A from the front and back directions, and twisting the fiber yarns 12 and 12A at the crossing portion 14 and closing the ring portions 15 and 15A, both the wire rods 13 and 13A are inserted. Is fixed at the intersection 14. Reference numeral 15A denotes an annular portion formed by a gap between the fiber yarns 12A and 12A at the intersecting portion 14. 5 is shown with the ring portions 15 and 15A opened for explanation, but in the actual net 11, the ring portions 15 and 15A have a closed structure.

  The net 11 has a substantially rectangular shape, and a rope member 16 is provided on the edge of the net 11. Further, as shown in FIGS. 6 and 7, the end portions of the wires 13 and 13A in the rope material 16 are folded back, and the wires 13 and 13A are fixed to each other by overlapping portions 18 of the wires 13 and 13A. , 13A is disposed between the rope members 16.

  The synthetic resin used for the mesh 11 is preferably high-density polyethylene, and when the high-density polyethylene is used, the specific gravity of the mesh 11 is 0.94 to 0.96. If necessary, the weather resistance can be improved by using carbon black or an ultraviolet absorber for the net 11.

  Furthermore, as shown in FIG. 8, the nets 11 and 11 are used in combination with different lengths M and m of one side of the mesh (M> m) and different thicknesses of the wires 13 and 13A. The large mesh net 11 uses thicker wires 13 and 13A than the small mesh net 11. For example, the length M of one side is 100 mm (millimeters), and the length m of one side is 4.0 to 4.5 mm. Then, a small net 11 is overlapped before a large net 11, that is, a plurality of nets 11, 11 are overlapped so that a small rope 11 on the mountain side is positioned between the columns 5 and 5. To stretch. In this example, one small mesh 11 and two large meshes 11 and 11 are superposed, and the rope members 16, 16, 16 of the small mesh 11 and the large nets 11, 11 are overlapped. A multiplex net 18 knitted and integrated with a connecting rope member (not shown) or the like is used. The multiplex net 18 has a horizontal width dimension corresponding to the interval between the columns 5 and 5 and a height of the protective surface 7. It has a height dimension corresponding to the height. In the multiplex network 18, a small network 11 is arranged on the sea U side.

  Next, the details of the structure for attaching the net 11 to the pillars 5, 5... Will be described.

  As shown in FIG. 1 and FIG. 2, horizontal rope members 21 are stretched between the columns 5, 5,... An organic fiber rope or the like is used as the rope material 21. The eyebolts 22 and 22 which are both ends fixing portions are fixed to the upper and lower sides of the pillars 5 and 5 at both ends, and the ring body 21A is connected to the eyebolt 22 by a turnbuckle 23, and the turnbuckle 22 is adjusted to adjust the horizontal rope material. A predetermined tension is applied to 21. Note that the eye bolt 22 has a ring portion (not shown) for connecting the turnbuckle 23 to the base end of the eye bolt 22 having a screw portion embedded in the concrete pillar 5.

  The rope members 16, 16, 16 on the upper and lower sides of the multiplex net 18 are connected at a plurality of points by a ring body 24 made of a fiber rope or the like. In addition, the left and right ends of the adjacent multiple net 18 are connected to each other at the center of the front surface of the pillar 5 on the sea side. In this case, the right and left rope members 16, 16, 16 are connected to each other by a fiber rope for connection. Connect with 25. In this case, as shown in FIG. 4, the ropes 16, 16, 16 of the three nets 11, 11, 11 of the three nets 11, 11, 11 and the other rope members 16, 16, 16 are connected. The connection can be made by weaving spirally with the connecting fiber rope 25.

  In addition, a connection location fixing means 26 for fixing the connection locations at the connection locations of the adjacent multiple networks 18 on the front surface of the pillar 5 is provided. The connection location fixing means 26 includes a plate-like pressing member 27 made of a flat bar and the like, and a plurality of bolts 28 for fixing the pressing member 27 to the front surface of the column 5. The left and right end portions are sandwiched and fixed between the front surface of the column 5 and the surface of the pressing member 27. The pressing member 27 has a height corresponding to the height of the net 11. The fixing restricts the movement of the left and right ends of the net 11 in the left-right direction (the road length direction) and the movement in the up-down direction. In this example, the column 5 adjacent to the column 5 provided with the connecting portion fixing means 26 is not provided with the connecting portion fixing means 26, but the connecting portion fixing means 26 is provided on the column 5 every time one is skipped. One of the left and right end portions of the multiplex network 18 is fixed to the column 5 by the connecting portion fixing means 26. Therefore, since at least one of the left and right end portions, which are the longitudinal direction of the multiplex network 18, is fixed by the connection place fixing means 26 with substantially the entire length in the length direction, the single multiplex network 18 with respect to wave force Can fully demonstrate the effect.

  In addition, diagonal rope members 29 and 29 are arranged in the crossing direction between adjacent columns 5 and 5, and upper and lower ends of the inclined rope members 29 and 29 are connected to the horizontal rope members 21 and 21 or the column 5. Further, if necessary, the diagonal rope members 29 and 29 are connected to the multiple network 18 composed of the network 11 at a plurality of locations. In this way, by providing the slanted rope members 29 and 29 serving as cross ropes in one multiplex network 18, even if wave force is applied to a part of the multiplex network 18, the entire multiplex network 18 is deformed, and the force Can be effectively absorbed.

Thus, in the present embodiment, corresponding to claim 1, in the overtopping prevention device provided on the road M which is a traffic route along the coast, the protective surface comprising the synthetic resin net 11 provided on the coast side of the road M. 7 and an installation means for installing the net 11, and the installation means is a column 5 arranged along the traffic route. A net 11 is stretched between these columns 5 and 5 to provide a protective surface 7. The right and left ends of the mesh 11 are connected to each other, and at least one of the left and right ends of the mesh 11 is fixed by being sandwiched between the sea side front surface of the pillar 5 and a plate-like presser material 27 fixed to the front surface. Yes. The protective surface 7 made of the synthetic resin net 11 can receive a wave and reduce the wave force. Further, by making the mesh 11 made of synthetic resin, it is superior in durability against seawater compared to steel. Further, since the synthetic resin net 11 has flexibility, it can be made compact by winding it at the time of carrying in, and at the same time, the workability at the site is also improved. Further, the net 11 is stretched between the columns 5 and 5 by being sandwiched between the plate-shaped presser material 27 and the column 5, so that the protective surface 7 can be easily provided, and the wave force received by the protective surface 7. Can be alleviated and reduced by each network 11. In particular, there is a convenience that the pillar 5 of the existing structure can be used. Further, by arranging the diagonal rope members 29 and 29 between the adjacent columns 5 and 5 in the crossing direction, even if wave force is applied to a part of the net 11, it is deformed in the entire net 11 and the wave force is effectively applied. Can be absorbed into.

  In this way, in the present embodiment, in correspondence with claim 2, the nets 11 and 11 having different mesh sizes are overlapped, so that gravel caught in the waves is captured by the small mesh net 11. The wave power can be efficiently absorbed by the thick net 11 having a large mesh.

  Further, in this embodiment, in correspondence with the third aspect, since the net 11 is a knotless net, the wires 13 and 13A constituting the net 11 are formed straight without being connected at the intersection 14. Therefore, when a force is applied to the net 11, the force is dispersed throughout the net 11, so that a high wave force absorption effect can be obtained. Also, in the knot network, when the wire is tied at the intersection, the tensile force concentrates on the wire at the intersection, so that part tends to be weak, but such a problem is not a nodule network and has a high wave force absorption function. Obtainable.

  In this way, in this embodiment, in correspondence with claim 4, the pillar 5 supports the roof 3 that covers at least a part of the road M as a traffic path. A protective surface 7 made of a net 11 can be installed using a pillar 5 of a protective structure with a covering roof 3.

  Further, as an effect of the embodiment, one multiplex network 18 is provided between the pillars 5 and 5, and the connection locations are connected to the connection location fixing means 26 at the connection locations of the adjacent multiplex networks 18 on the front surface of the columns 5. Therefore, at least one of the left and right sides of the vertically long multiplex network 18 composed of a plurality of networks 11 is fixed by the connection location fixing means 26, and each multiplex network is controlled against the wave force. The power can be reduced and reduced by 18.

  FIG. 9 shows a second embodiment of the present invention. The same reference numerals are given to the same portions as those in the first embodiment, and detailed description thereof will be omitted. In this example, the ring body 24 is flexible. For example, it is composed of an endless rope, etc., and the wires 24 of the ring body 24 are extended so as to overlap each other, and one end 24A is wound around the rope members 16, 16, 16 and the loop of the wound end 24A The other end 24B is inserted into the inside, and the lateral rope member 21 is passed through the end 24B.

  As mentioned above, although the Example of this invention was explained in full detail, this invention is not limited to the said Example, A various deformation | transformation implementation is possible within the range of the summary of this invention. For example, in claim 4, it is possible to provide only columns without providing a roof, and provide a protective surface between the columns. In addition, it is preferable that a plurality of nets 11 are overlapped to form a multiple network, but one may be used, or two or four or more may be used in an overlapping manner.

It is a front view of the pillar which shows Example 1 of this invention, and a protection surface. It is a top view of a pillar and a protection surface same as the above. It is sectional drawing of a protection structure same as the above. It is a front view which shows the connection part of an adjacent network same as the above. It is a front explanatory drawing explaining the structure of a net | network same as the above. FIG. 2 is a plan development view of an end portion of a net, showing a net and a rope material. FIG. 7A is a side view of a net partly in section, FIG. 7A shows a state in which rope materials are overlapped on the end side of the net, and FIG. 7B overlaps by folding the end of the net. The state which formed the part is shown. FIG. 8A is a side view of the main part of the net with a part in cross section. FIG. 8A shows a net with a large mesh, and FIG. 8B shows a net with a small mesh. 9 shows a second embodiment of the present invention, FIG. 9A is a front view of the main part of the protective surface, and FIG. 9B is a cross-sectional view of the main part of the protective surface.

3 roof 5 pillar (installation means)
7 Protective surface
11 Net
16 Rope material
18 Multiple networks
27 Presser foot Y Mountain U Sea M Road

Claims (4)

An overtopping prevention device provided on a traffic road along the coast, comprising a protective surface made of a synthetic resin net provided on the coast side of the traffic road, and an installation means for installing the net, the installation means being a traffic road The nets are arranged along the columns, the nets are stretched between the columns to provide the protective surface, the left and right ends of the adjacent nets are connected to each other, and at least one of the left and right ends of the nets is A wave overtopping prevention device characterized by sandwiching and fixing between the front side of the column on the sea side and a plate-like presser fixed to the front side, and an oblique rope member arranged in an intersecting direction between adjacent columns . 2. The overtopping prevention apparatus according to claim 1, wherein the nets having different mesh sizes are overlapped. 3. The overtopping prevention device according to claim 1, wherein the network is a knotless network. The overtopping prevention device according to any one of claims 1 to 3, wherein the pillar supports a roof that covers at least a part of the traffic path.

Images