Cage frame, and river levee reinforcement structure
The improved cage frame design for river embankment reinforcement, featuring a welded wire mesh back slope shoulder with smaller mesh size and thicker wire, addresses the issues of weak adhesion and inadequate overtopping resistance, resulting in enhanced structural integrity against overtopping.
Patent Information
- Application Number
- JP2023206099
- Authority / Receiving Office
- JP · JP
- Patent Type
- Applications
- Current Assignee / Owner
- Filing Date
- 2023-12-06
- Publication Date
- 2025-06-18
AI Technical Summary
Conventional cage frame methods for reinforcing river embankments suffer from weak adhesion to top protection works and inadequate overtopping resistance due to the use of crushed stones or jade stones with large diameters as filling materials.
The cage frame design includes a back slope part with a wire mesh cage and a back slope shoulder part made of welded wire mesh with a smaller mesh size and thicker wire diameter than the back slope part, accommodating filling materials with smaller particle sizes to enhance compaction and adhesion with top protection works.
This design improves the adhesion between the cage frame and top protection works, enhancing the overtopping resistance of the river embankment reinforcement structure.
Smart Images
Figure 2025091097000001_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to a cage frame installed on a river embankment and a reinforcement structure of a river embankment.
Background Art
[0002] Conventionally, as a method for reinforcing a river embankment, a cage frame method (cage mat method) composed of a diamond-shaped wire mesh has been used. In addition to installing the conventional cage frame method on the river side of the river embankment, for example, as shown in FIG. 6(a), by packing stones in a plurality of connected cage frames 8 and installing them on the river bottom side, it is possible to prevent the embankment from collapsing in the event of overtopping. Here, the conventional cage frame 8 includes a horizontal portion 81 installed on the back slope shoulder, a vertical portion 82 installed on the back slope surface, and a hanging portion 83 installed on the back slope bottom. The cage frame 8 is a wire mesh cage partitioned into a plurality of compartments by a bottom surface 84, an upper lid 85, side walls 86, and partitions 87, and a filling material 810 such as crushed stones or jade stones is filled in each compartment. Note that the side walls 86 and the partitions 87 are fixed to the bottom surface 84 by winding a first coupling coil 88 as shown in FIG. 6(b), for example. Further, the side walls 86 and the partitions 87 are fixed by winding a second coupling coil 89, for example. The upper lid 85 is a foldable diamond-shaped wire mesh, and is installed across a plurality of compartments as shown in FIG. 6(a), for example, and is fixed by winding a coupling coil (not shown) in the same manner as the bottom surface 84.
[0003] By installing such a cage frame 8 on a river embankment, the river embankment can be reinforced. Here, in order to take further countermeasures against overtopping, it is necessary to construct asphalt paving and retaining blocks as top protection works on the upper surface of the horizontal portion 81. However, since the conventional cage frame 8 uses crushed stones or jade stones with a diameter of φ100 mm to φ200 mm as the filling material, the adhesion to the top protection work installed on the upper surface of the horizontal portion 81 is weak and unstable, and depending on the magnitude of the overtopping flow, the asphalt paving and retaining blocks are damaged, resulting in the weakening of the embankment and, in the worst case, the risk of the embankment collapsing. For this reason, the conventional cage frame 8 cannot improve the adhesion to the top protection work and cannot improve the overtopping resistance.
[0004] In addition, Patent Documents 1 to 6 disclose techniques related to a cage frame and a reinforcement structure used for reinforcing river levees.
Prior Art Documents
Patent Documents
[0005]
Patent Document 1
Patent Document 2
Patent Document 3
Patent Document 4
Patent Document 5
Patent Document 6
Summary of the Invention
Problems to be Solved by the Invention
[0006] The cage frames disclosed in Patent Documents 1 to 4 do not disclose the features of the horizontal portion installed on the back slope shoulder. In addition, the levee reinforcement structure disclosed in Patent Document 5 does not disclose the top-end protection work installed on the upper surface of the horizontal portion. Further, the levee reinforcement structure disclosed in Patent Document 6 does not disclose the adhesion between the top-end paving and the top end. That is, the techniques disclosed in Patent Documents 1 to 6 have a problem that the degree of adhesion between the cage frame and the top-end protection work cannot be improved, and the overtopping resistance cannot be improved.
[0007] Therefore, the present invention has been devised in view of the above-described problems, and an object thereof is to provide a cage frame with improved overtopping resistance and a river levee reinforcement structure.
Means for Solving the Problems
[0008] The cage frame in the first invention is characterized by comprising a back slope part of a wire mesh cage installed along the slope of the river bottom, and a back slope shoulder part of a welded wire mesh cage that is joined to the back slope part and installed on the slope shoulder of the river bottom, having a mesh size smaller than that of the back slope part.
[0009] In the second invention, for the cage frame, in the first invention, the back slope shoulder part is characterized in that the mesh size is 25 mm to 50 mm.
[0010] In the third invention, for the cage frame, in the first or second invention, the back slope shoulder part is characterized by having a wire diameter thicker than that of the back slope part.
[0011] In the fourth invention, for the cage frame, in the third invention, the back slope shoulder part is characterized in that the wire diameter is more than φ5 mm and up to φ6 mm.
[0012] The reinforcement structure of the river embankment in the fifth invention is characterized by comprising a back slope part of a wire mesh cage installed along the slope of the river bottom and having a first filling material accommodated therein, and a back slope shoulder part of a welded wire mesh cage that is joined to the back slope part and installed on the slope shoulder of the river bottom, having a mesh size smaller than that of the back slope part and accommodating a second filling material with a smaller particle size than the first filling material.
[0013] In the sixth invention, for the reinforcement structure of the river embankment, in the fifth invention, it is characterized by comprising a top end protection part covering the upper surface of the back slope shoulder part.
[0014] In the seventh invention, for the reinforcement structure of the river embankment, in the fifth or sixth invention, it is characterized by comprising a back bottom part of a wire mesh cage that is joined to the back slope part, exposed and installed at the bottom of the river bottom, and has the first filling material accommodated therein.
[0015] In the eighth invention, for the reinforcement structure of the river embankment, in the seventh invention, it is characterized by comprising a root fixing part installed below the back bottom part.
Advantages of the Invention
[0016] According to the first to fourth inventions, the cage frame includes a back reinforcing shoulder of a welded wire mesh cage having a mesh size smaller than that of the back flat surface portion. Therefore, when reinforcing a river levee, it is easy to tighten the filling material accommodated inside, and the adhesion with the top protection work can be improved. Thereby, it is possible to improve the overtopping resistance of the reinforcing structure of the river levee using the cage frame.
[0017] In particular, according to the second invention, the back reinforcing shoulder has a mesh size of 25 mm to 50 mm. That is, the back reinforcing shoulder has a mesh size smaller than the mesh size of about 75 mm to about 100 mm usually adopted for the back flat surface portion. Therefore, when reinforcing a river levee, it is easy to tighten the filling material accommodated inside, and the adhesion with the top protection work can be improved. Thereby, it is possible to improve the overtopping resistance of the reinforcing structure of the river levee using the cage frame.
[0018] In particular, according to the third invention, the back reinforcing shoulder has a wire diameter thicker than that of the back flat surface portion. Therefore, when reinforcing a river levee, it is easier to further tighten the filling material accommodated inside, and the adhesion with the top protection work can be further improved. Thereby, it is possible to further improve the overtopping resistance of the reinforcing structure of the river levee using the cage frame.
[0019] In particular, according to the fourth invention, the back reinforcing shoulder has a wire diameter exceeding φ5 mm to φ6 mm. That is, the back reinforcing shoulder has a wire shape thicker than the wire shape of about φ4 mm to φ5 mm usually adopted for the back flat surface portion. Therefore, when reinforcing a river levee, it is easier to further tighten the filling material accommodated inside, and the adhesion with the top protection work can be further improved. Thereby, it is possible to further improve the overtopping resistance of the reinforcing structure of the river levee using the cage frame.
[0020] According to the fifth to eighth inventions, the reinforcing structure of the river embankment includes a backfill shoulder of a welded wire mesh cage having a mesh size smaller than that of the backfill surface portion and containing a second backfill material having a smaller particle size than the first backfill material inside. Therefore, when reinforcing the river embankment, it is easy to compact the backfill material accommodated inside, and the adhesion with the top protection work can be improved. Thereby, the overtopping resistance of the reinforcing structure of the river embankment can be improved.
[0021] In particular, according to the sixth invention, the reinforcing structure of the river embankment includes a top protection portion that covers the upper surface of the backfill shoulder. Therefore, it is possible to prevent the water that has overflowed from entering inside the backfill shoulder. Thereby, the durability of the river embankment can be improved.
[0022] In particular, according to the seventh invention, the reinforcing structure of the river embankment includes a backfill bottom portion that is joined to the backfill surface portion and exposed at the river bottom edge. Therefore, the water that has overflowed is discharged more efficiently compared to the case where the backfill bottom portion is buried. Thereby, the durability of the river embankment can be improved.
[0023] In particular, according to the eighth invention, it includes a rooting portion installed below the backfill bottom portion. Therefore, it has a function of attenuating the flow velocity drained from the backfill bottom portion by a rooting mechanism that secures the shape of the backfill bottom portion. Also, compared to the case of directly draining water from the backfill bottom portion, the momentum of overtopping can be suppressed, and erosion of the land inside the embankment (residential area) can be suppressed. Thereby, the convenience of the reinforcing structure of the river embankment can be improved.
Brief Description of the Drawings
[0024]
Figure 1
Figure 2
Figure 3
Figure 4
Figure 5
Figure 6
Mode for Carrying Out the Invention
[0025] Hereinafter, with reference to the drawings, an example of the cage frame 1 and the reinforcement structure 100 of the river embankment as an embodiment of the present invention will be described in detail. In each figure, the first direction is defined as the X direction, one direction orthogonal to the first direction X is defined as the second direction Y, and the direction orthogonal to each of the first direction X and the second direction Y is defined as the third direction Z. The configurations in each figure are schematically described for the purpose of explanation, and for example, the size of each configuration and the comparison of sizes for each configuration may be different from those in the figure.
[0026] (Cage Frame 1) With reference to the drawings, an example of the cage frame 1 in the present embodiment will be described.
[0027] The cage frame 1 is used, for example, as shown in FIG. 1, for the reinforcement structure 100 of the back embankment that is reinforced by the cage frame method (cage frame slope method) along the slope on the back side of the river embankment E.
[0028] The cage frame 1 includes, for example, a back slope surface part 11 and a back slope shoulder part 12. The cage frame 1 may include, for example, a back slope bottom part 13.
[0029] <Back Slope Surface Part 11> The back slope surface part 11 is installed along the back slope of the river embankment E. The back slope surface part 11 is a wire mesh cage made of wire mesh. Here, being made of wire mesh may mean a welded wire mesh that does not loosen, or may be a flexible diamond wire mesh, a checkerboard wire mesh, an expanded metal, etc. formed by connecting a plurality of wire mesh pieces.
[0030] The back slope surface part 11 may be formed by connecting a plurality of back slope surface parts 11a, 11b, and 11c along the slope surface of the river embankment E in the first direction X, as shown in FIG. 1 for example. The back slope surface part 11 may also be formed by connecting a plurality of back slope surface parts 11 along the slope surface in the second direction Y, for example.
[0031] The wire cage forming the back slope surface part 11 has, for example, a width of about 1500 mm, a depth of about 2000 mm, and a height of about 500 mm, and is a framework mainly made of zinc-aluminum alloy-plated iron wire. The wire cage forming the back slope surface part 11 has, for example, a mesh size of about 75 mm to about 100 mm and a wire diameter of about φ4 mm to about φ5 mm.
[0032] <Back slope shoulder part 12> The back slope shoulder part 12 is joined to the back slope surface part 11 and installed on the river bottom slope shoulder of the river embankment E. The back slope shoulder part 12 is a wire cage made of welded wire mesh. Therefore, the back slope shoulder part 12 has no mesh collapse, is rigid, and is easy to stand on its own.
[0033] The back slope shoulder part 12 may be formed by connecting a plurality of wire cages in the first direction X or the second direction Y at the slope shoulder of the river embankment E, for example.
[0034] The back slope shoulder part 12 preferably has a width in the first direction X of about 500 mm to about 2000 mm, more preferably about 1000 mm to about 2000 mm. The wire cage forming the back slope shoulder part 12 has, for example, a width of about 1000 mm, a depth of about 2000 mm, and a height of about 500 mm, and is a framework mainly made of zinc-aluminum alloy-plated iron wire.
[0035] The wire cage forming the reverse method shoulder part 12 has a mesh size of, for example, about 25 mm to about 50 mm. That is, the reverse method shoulder part 12 has a smaller mesh size than the mesh size of about 75 mm to about 100 mm usually adopted for the reverse method face part 11, and it is less likely to spill crushed stones compared to the reverse method face part 11 and can withstand compaction. In this case, when reinforcing the river levee E, the backfill material accommodated inside can be easily compacted, and the adhesion to the top protection work can be improved. Thereby, the overtopping resistance of the reinforcement structure 100 of the river levee using the cage frame 1 can be improved. Note that the mesh size of the wire cage forming the reverse method shoulder part 12 may be arbitrarily designed according to the particle size of the backfill material inside the wire cage. Also, when using a diamond wire mesh for the reverse method shoulder part 12, even if the mesh size is made finer, the intersections of the wire rods shift, and when compacting the internal backfill material with a rammer or the like, it deforms, so it is necessary to use a welded wire mesh with high rigidity.
[0036] The wire cage forming the reverse method shoulder part 12 has a wire diameter exceeding φ5 mm to about φ6 mm. That is, the reverse method shoulder part 12 has a thicker wire diameter than the wire diameter of about φ4 mm to φ5 mm usually adopted for the face part 82 used for the conventional cage frame 8. For this reason, compared with the case of using the horizontal part 81 having the same mesh size and wire diameter as the face part 82 used for the conventional cage frame 8, the backfill material is less likely to spill from the mesh, and it is easier to further compact the backfill material accommodated inside when reinforcing the river levee E, and the adhesion to the top protection work can be further improved. Thereby, the overtopping resistance of the reinforcement structure 100 of the river levee using the cage frame 1 can be further improved.
[0037] The reverse method shoulder part 12 may not be provided with an upper lid, for example. That is, the top protection work can be provided on the compacted backfill material accommodated inside the reverse method shoulder part 12. In this case, when the smooth surface of the compacted backfill material and the top protection work come into contact when reinforcing the river levee E, the adhesion to the top protection work can be improved. Thereby, the overtopping resistance can be improved.
[0038] In addition, in order to make the back method shoulder part 12 stronger, examples of using structures other than the wire cage can be considered. However, in order to obtain higher strength at the joint part with the back method face part 11, it is preferable to use the same wire cage as the back method face part 11 so that it can be joined via a coupling coil or the like.
[0039] <Back method butt part 13> The back method butt part 13 is joined to the back method face part 11 and installed at the river bottom butt of the river levee E. The back method butt part 13 is a wire cage made of wire mesh, and may be a welded wire mesh or a diamond wire mesh similar to the back method face part 11.
[0040] The back method butt part 13 is composed of one or more wire cages. For example, it is preferable that the width in the first direction X is about 1000 mm to about 2000 mm. The wire cage constituting the back method butt part 13 has, for example, a width of about 1000 mm, a depth of about 2000 mm, and a height of about 500 mm, and is a framework mainly made of a zinc-aluminum alloy plated iron wire. The wire cage constituting the back method butt part 13 has, for example, a mesh size of about 75 mm to about 100 mm and a wire diameter of about φ4 mm to about φ5 mm, similar to the back method face part 11.
[0041] In addition, in order to make the back method butt part 13 stronger, examples of using structures other than the wire cage can be considered. However, in order to obtain higher strength at the joint part with the back method face part 11, it is preferable to use the same wire cage as the back method face part 11 so that it can be joined via a coupling coil or the like.
[0042] (Reinforcement structure 100 of river levee) Next, with reference to the drawings, an example of the reinforcement structure 100 of the river levee using the cage frame 1 in the present embodiment will be described.
[0043] The reinforcement structure 100 of the river levee has, for example, overall dimensions of a width of about 10000 mm, a depth of about 10000 mm, and a height of about 5000 mm as shown in FIGS. 2 to 4, and includes a plurality of wire cages joined to each other. Note that the bracketed width in FIG. 2 indicates the diagonal dimension.
[0044] The reinforcement structure 100 of the river embankment is installed, for example, along the slope on the riverbed side of the river embankment E, and includes a back slope part 11 in which a first filling material 110 is accommodated, and a back slope shoulder part 12 that is joined to the back slope part 11 and installed on the slope shoulder on the riverbed side, and a second filling material 120 is accommodated inside. A drainage channel 4 is provided, for example, on the riverbed side of the reinforcement structure 100 of the river embankment. Also, a suction prevention sheet 5 is provided between the reinforcement structure 100 of the river embankment and the river embankment E to prevent overtopping water from penetrating into the river embankment E. The suction prevention sheet 5 is, for example, a non-woven fabric sheet with a water permeability coefficient of about 10 -1 cm / sec and a thickness of about 10 mm, which allows water to pass through but does not allow sediment to pass through.
[0045] The reinforcement structure 100 of the river embankment may include, for example, a back slope bottom part 13 in which a first filling material 110 is accommodated. At this time, the reinforcement structure 100 of the river embankment may include a grounding part 14 below the back slope bottom part 13. Also, the reinforcement structure 100 of the river embankment may include, for example, a top end protection part 2 and an asphalt paving part 3.
[0046] <First filling material 110> The first filling material 110 is accommodated, for example, inside the back slope part 11 and inside the back slope bottom part 13 as shown in FIG. 2. As the first filling material 110, for example, crushed chestnut stones or jade stones with a particle size of about φ100 mm to about φ200 mm are used.
[0047] <Second filling material 120> The second filling material 120 is accommodated, for example, inside the back slope shoulder part 12. As the second filling material 120, for example, crushed stones with a particle size of φ40 mm or less (including crusher run of C-40, etc.) and embankment soil sand, etc. are used.
[0048] The second intermediate filling material 120 is fastened, for example, inside the back slope shoulder 12. In this case, when the top end protection member is provided above the back slope shoulder 12, the top end protection member is stabilized. Thereby, the river embankment reinforcement structure 100 can exhibit high overtopping resistance. Further, when any of the back slope surface portion 11, the back slope shoulder 12, and the back slope bottom portion 13 is made of a wire mesh cage, they are firmly connected by a binding coil or the like, and the back slope surface portion 11, the back slope shoulder 12, and the back slope bottom portion 13 can exhibit high overtopping resistance as an integrated structure. Thereby, further improvement in the overtopping resistance of the river embankment reinforcement structure 100 can be achieved. Note that the second intermediate filling material 120 may be fastened with a known fastening machine such as a rammer or a plate.
[0049] On the other hand, in the conventional cage frame 8 (FIG. 6(a)), since crushed stones or the like are used for the intermediate filling material 810 accommodated in the horizontal portion 81, the intermediate filling material 810 cannot be fastened inside the horizontal portion 81. For this reason, when the top end protection member is provided above the horizontal portion 81, the top end protection member is not stabilized, and the overtopping resistance cannot be improved in the reinforcement structure using the cage frame 8.
[0050] <Back slope bottom portion 13> The back slope bottom portion 13 houses the first intermediate filling material 110 inside. Different intermediate filling materials such as a combination of pebbles and crushed stones may be accommodated in the first intermediate filling material 110 inside the back slope bottom portion 13 and the first intermediate filling material 110 inside the back slope surface portion 11.
[0051] The back slope bottom portion 13 may be joined to, for example, the back slope surface portion 11 and installed so as to be exposed at the toe of the river bottom. In this case, the water that has overtopped is discharged more efficiently compared to the case where the back slope bottom portion 13 is buried. Thereby, the durability of the river embankment can be improved.
[0052] <Anchoring portion 14> The anchoring portion 14 is installed below the back slope bottom portion 13. The anchoring portion 14 may be made of, for example, a cage frame having the same material, mesh size, and wire diameter as the back slope bottom portion 13 and may be connected to the back slope bottom portion 13 via a binding coil or the like.
[0053] The root fixing part 14 is buried, for example, at least partially in the river embankment E. In this case, the back slope bottom part 13 is supported by the river embankment E via the root fixing part 14. Thereby, further improvement of the overtopping resistance of the river embankment reinforcement structure 100 can be achieved.
[0054] The root fixing part 14 has a function of attenuating the flow velocity drained from the back slope bottom part 13 by a root fixing mechanism that secures the shape of the back slope bottom part 13. Further, the root fixing part 14 can suppress the momentum of overtopping and suppress the erosion of the land inside the embankment (private land) compared to the case of directly draining water from the back slope bottom part 13. Thereby, improvement of the convenience of the river embankment reinforcement structure 100 can be achieved.
[0055] <Top end protection part 2> The top end protection part 2 is provided above the back slope shoulder part 12. The top end protection part 2 covers, for example, the upper surface of the back slope shoulder part 12. That is, the top end protection part 2 is provided in contact with the upper surface of the second inner filling material 120 tightened inside the back slope shoulder part 12 so as to cover the second inner filling material 120. In this case, intrusion of the overtopped water into the back slope shoulder part 12 can be prevented. Thereby, improvement of the durability of the river embankment can be achieved.
[0056] In FIGS. 2 to 4, a structure is shown in which the back slope shoulder part 12 is covered by the top end protection part 2 and the asphalt paving part 3 and is hidden in plan view, but the back slope shoulder part 12 may be entirely covered by the top end protection part 2, for example. In this case, even when overwater intrudes from the joint between the asphalt paving part 3 and the top end protection part 2, it is difficult for the overtopped water to intrude into the back slope shoulder part 12. Thereby, further improvement of the durability of the river embankment reinforcement structure 100 can be achieved.
[0057] As the top end protection part 2, for example, cast-in-place concrete, known retaining blocks, etc. are used.
[0058] <Asphalt paving part 3> The asphalt pavement section 3 is a known asphalt mixture provided, for example, on the upper surfaces of a river embankment E and a backfill shoulder 12. The asphalt pavement section 3 includes, for example, a surface layer (base layer) 31 and a roadbed 32. The asphalt pavement section 3 is joined to the top-end protection section 2 in the surface layer (base layer) 31 and the roadbed 32, for example. Also, the asphalt pavement section 3 is joined to the backfill shoulder 12 in the roadbed 32, for example.
[0059] <Drainage channel 4> The drainage channel 4 is a water channel provided mainly for the purpose of draining seepage water from inside the embankment body, for example.
[0060] <Suction prevention sheet 5> The suction prevention sheet 5 is a sheet for preventing erosion of the embankment soil by overtopping water passing through the reinforcement structure 100 of the river embankment. For example, a known suction prevention sheet made of synthetic resin is used. The suction prevention sheet 5 is provided, for example, on the side surface and bottom surface of the backfill shoulder 12, the bottom surface of the backfill face section 11, and the bottom surface of the backfill butt section 13 as shown in FIG. 3.
[0061] (Example of the reinforcement structure 100 of the river embankment) The backfill face section 11 may be composed of, for example, an L-shaped panel 111 (111’) having a substantially L-shaped cross section as shown in FIG. 5, and an upper cover panel 112 (112’) joined via a coupling coil 113 (113’) to the L-shaped panel 111 (111’). Here, a welded wire mesh is used for the L-shaped panel 111, and a welded wire mesh, a diamond wire mesh, a hexagonal wire mesh, or an expanded metal is used for the upper cover panel 112. Note that it is preferable to use a welded wire mesh for the upper cover panel 112 because the first filler 110 is less likely to shift during overtopping, and the reduction in the overtopping resistance of the reinforcement structure 100 of the river embankment can be suppressed.
[0062] For the back surface method surface part 11, a hook-shaped locking part 111a may be provided at the tip of the L-shaped panel 111 (111’). At this time, the L-shaped panel 111 of the back surface method surface part 11b may be coupled to the L-shaped panel 111’ of the back surface method surface part 11a via the locking part 111a. In this case, compared with the case of coupling the L-shaped panel 111 and the L-shaped panel 111’ with a coupling coil, when performing the coupling operation while riding on the back surface method surface part 11b, it is not necessary to insert the coupling coil into the slight gap between the back surface method surface part 11b and the river embankment E. Thereby, the workability of the reinforcing structure 100 of the river embankment can be improved.
[0063] According to the present embodiment, the cage frame 1 includes a back surface shoulder part 12 of a wire cage made of a welded wire mesh having a mesh smaller than that of the back surface method surface part 11. Therefore, when reinforcing the river embankment E, it is easy to tighten the inner filling material (the second inner filling material 120) accommodated therein, and the adhesion with the top-end protection work can be improved. Thereby, the overtopping resistance of the reinforcing structure 100 of the river embankment using the cage frame 1 can be improved.
[0064] According to the present embodiment, the back surface shoulder part 12 has a wire diameter thicker than that of the back surface method surface part 11. Therefore, when reinforcing the river embankment E, it is easier to further tighten the inner filling material (the second inner filling material 120) accommodated therein, and the adhesion with the top-end protection work can be further improved. Thereby, the overtopping resistance of the reinforcing structure 100 of the river embankment using the cage frame 1 can be further improved.
[0065] According to the present embodiment, the reinforcing structure 100 of the river embankment includes a second inner filling material 120 having a smaller particle size than the first inner filling material 110 accommodated therein, and a back surface shoulder part 12 of a wire cage made of a welded wire mesh having a mesh smaller than that of the back surface method surface part 11. Therefore, when reinforcing the river embankment E, it is easy to tighten the inner filling material (the second inner filling material 120) accommodated therein, and the adhesion with the top-end protection work can be improved. Thereby, the overtopping resistance of the reinforcing structure 100 of the river embankment can be improved.
[0066] According to this embodiment, the reinforcement structure 100 of the river embankment includes a top-end protection part 2 that covers the upper surface of the back slope shoulder 12. Therefore, it is possible to prevent the water that has overflowed from entering inside the back slope shoulder 12. Thereby, the durability of the river embankment can be improved.
[0067] According to this embodiment, the reinforcement structure 100 of the river embankment includes a back-bottom part 13 that is joined to the back-face part 11 and is installed so as to be exposed at the river bottom toe. Therefore, the water that has overflowed is discharged more efficiently compared to the case where the back-bottom part 13 is buried. Thereby, the durability of the river embankment can be improved.
[0068] According to this embodiment, the reinforcement structure 100 of the river embankment includes a grounding part 14 installed below the back-bottom part 13. Therefore, it has a function of attenuating the flow velocity drained from the back-bottom part 13 by a grounding mechanism that secures the shape of the back-bottom part 13. Also, compared to the case of directly draining water from the back-bottom part 13, the momentum of the overflow can be suppressed, and erosion of the land (private land) inside the embankment can be suppressed. Thereby, the convenience of the reinforcement structure 100 of the river embankment can be improved.
[0069] Although some embodiments of the present invention have been described, these embodiments are presented as examples and are not intended to limit the scope of the invention. These novel embodiments can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the gist of the invention. These embodiments and their modifications are included in the scope and gist of the invention, and are also included in the invention described in the claims and the equivalent scope thereof.
Explanation of Reference Numerals
[0070] 100 Reinforcement structure of river embankment 1 Cage frame 11 Back-face part 110 First filling material 111 L-shaped panel 111a Locking part 112 Upper cover panel 12 Back slope shoulder 120 Second intermediate material 13 Rear lining part 14 Root fixing part 2 Top end protection part 3 Asphalt paving part 4 Drainage channel 8 Conventional basket frame 81 Horizontal part 82 Slope surface part 83 Hanging part 84 Bottom surface 85 Upper lid 86 Side wall 87 Partition wall 88 First coupling coil 89 Second coupling coil E River levee
Claims
1. The back slope part of a wire mesh cage installed along the slope of a river bottom, The back slope shoulder part of a welded wire mesh cage that is joined to the back slope part and installed on the slope shoulder of the river bottom, and has a mesh size smaller than that of the back slope part, Comprising A cage frame characterized by the above.
2. The back slope shoulder part is characterized in that the mesh size is 25 mm to 50 mm. The cage frame according to claim 1, characterized by the above.
3. The back slope shoulder part is characterized in that it has a wire diameter thicker than that of the back slope part. The cage frame according to claim 1 or 2, characterized by the above.
4. The back slope shoulder part is characterized in that the wire diameter is more than φ5 mm to φ6 mm. The cage frame according to claim 3, characterized by the above.
5. The back slope part of a wire mesh cage installed along the slope of a river bottom and having a first inner filling material accommodated therein, The back slope shoulder part of a welded wire mesh cage that is joined to the back slope part and installed on the slope shoulder of the river bottom, has a second inner filling material with a smaller particle size than the first inner filling material accommodated therein, and has a mesh size smaller than that of the back slope part, Comprising A reinforcement structure for a river embankment, characterized by the above.
6. Comprising a top end protection part covering the upper surface of the back slope shoulder part. The reinforcement structure for a river embankment according to claim 5, characterized by the above.
7. Comprising a back bottom part of a wire mesh cage that is joined to the back slope part, exposed and installed at the bottom of the river bottom, and has the first inner filling material accommodated therein. The reinforcement structure for a river embankment according to claim 5 or 6, characterized by the above.
8. Comprising a root fixing part installed below the back bottom part. The river levee reinforcement structure according to claim 7, characterized by
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