JP5661962B1 - Slope structure for road step - Google Patents

Abstract

An object of the present invention is to be able to perform construction in a short time and with labor-saving, and to enable continuous travel of large vehicles in the event of a disaster. A foldable cell structure 20 laid on a lower road surface 12, a filling material 30 filling a cell of the expanded cell structure 20, and a cell structure 20 are laid on the upper surface of the cell structure 20. A grid material 40 that seals the filling material and a protective layer 50 that covers the grid material 40 are provided. The grid material 40 cooperates with the cell structure 20 to restrain the displacement of the filling material 30 and restrains the displacement of the protective layer 50. [Selection] Figure 2

Description

  The present invention relates to a slope structure for a road surface step portion that can secure an emergency transportation route by eliminating the step and saving labor in a short time in the event of a disaster or the like.

During the Great East Japan Earthquake, steps were created at the road boundary between the road and the bridge and the road boundary above the underground structure, and the traffic network was severed at various locations.
In Patent Document 1, the base end of a stepped plate with a metal-based leg is attached to the stepped surface of the stepped portion, and the vehicle is made to pass using the stepped plate that extends obliquely downward from the top of the stepped surface. Is disclosed.
In addition, as a means for eliminating the step, a method of stacking a plurality of sandbags and a method of combining a sandbag and a laid iron plate are also known.

JP 2010-90534 A

<1> Since the level difference eliminating plate disclosed in Patent Document 1 is a heavy metal object, not only heavy equipment is required for installation, but also the material cost is increased, and much time and labor is required to install the level difference eliminating plate. Cost.
<2> In the method using sandbags, a great deal of labor and time are required to produce a large number of sandbags immediately after the disaster.
There is also a method of storing a large amount of sandbags, but not only does it require a large storage space, but also because the bag body deteriorates in about a year, it is necessary to periodically refill the sandbags, resulting in maintenance costs. There is also a problem that increases.
<3> In a structure in which sandbags are simply stacked, the slope surface is undulating, making it difficult for the vehicle to pass. In addition, there was a problem in durability because the bag body was torn after several runs.
In particular, it is difficult to withstand continuous running of a large vehicle having a loading capacity of 10 t class.
<4> In the method of covering the surface of the sandbag with the iron covering plate, it is necessary to install the iron covering plate after many sandbags have been stacked, and it takes a lot of time and labor to complete the work.
In particular, since the laying iron plate is a heavy article of 800 kg or more, it is necessary to use a crane or other equipment at both the place where the laying iron plate is loaded and the laying site.
<5> After finishing the role of emergency measures, temporary paving may be performed on the stepped portion.
At this time, it is necessary to remove the installed iron plate and many sandbags installed as an emergency measure, but it takes a lot of time and labor to remove these materials.

The present invention has been made in view of the above-described points, and an object thereof is to provide a slope structure for the next road surface step portion.
<1> It can be constructed in a short time and with labor savings, and large vehicles can be continuously run in the event of a disaster.
<2> Material stock must be maintenance-free and space-saving.
<3> Excellent removability after completing the role of first aid measures.

The present invention provides a slope structure for a road surface step portion that is installed at a step portion of a road surface to form a slope surface, the foldable cell structure laid on a lower road surface, and the expanded cell structure A filling material to be filled in the cells of the body, a grid material laid on the upper surface of the cell structure to seal the filling material, and a protection covering the grid material and forming a slope running surface on the grid material The cell structure has a three-dimensional honeycomb structure having a plurality of cells open at the top and bottom, and has a single surface so that its height gradually decreases from one side to the other in the development direction. The cell structure is deployed and laid so that the higher side of the cell structure faces the step surface of the road surface and the lower side of the cell structure is separated from the step surface, Grid material and cell structure While restraining the displacement of the middle filling material and work, characterized by restraining the displacement of the protective layer.
Furthermore, in another aspect of the present invention, the cell structure is further provided on the slope surface of the raised slope body installed on the road surface, further including a raised slope body for raising the cross-sectional shape having a wedge shape and forming a slope surface on the upper surface. The cell structure is raised by placing the body.
Furthermore, in another embodiment of the present invention, the filling material and the protective layer are hard granular materials.
Furthermore, in another embodiment of the present invention, the raised slope body is a hard granular body.

The present invention can obtain at least one of the following effects.
<1> It is easy to transport and assemble materials such as cell structures and grid materials that constitute the slope structure, and without using special heavy machinery or equipment, it can be constructed in a short time and with labor savings. The body can be constructed.
<2> A slope structure constructed using materials that are lightweight and easy to handle is excellent in durability, and can be used as an emergency transportation route that allows continuous travel of large vehicles in a disaster.
<3> The storage space for the material is small, and maintenance is not particularly required over a long period of time.
By using the <4> raised slope body in combination, the cell structure can be substantially raised to compensate for the shortage of the cell structure height.
Therefore, no matter how large the step of the road surface is, the step can be eliminated by using a commercially available inexpensive cell structure.
<5> The slope structure can be disassembled and removed in a short time by lifting the cell structure and the grid material, and the work can be performed in a short time not only during the construction of the slope structure.

The perspective view of the slope structure which concerns on this invention which abbreviate | omitted one part Sectional view of II-II in FIG. Explanatory drawing of construction method of slope structure Explanatory drawing of construction method of slope structure Explanatory drawing of removal method of slope structure The perspective view of the slope structure which concerns on other embodiment using the raising slope body Sectional view of VII-VII in FIG. Explanatory drawing of construction method of slope structure

  Hereinafter, the present invention will be described with reference to the drawings.

<1> Outline of Slope Structure for Road Surface Stepped Part When described with reference to FIGS. 1 and 2, a step is generated between the road surface 11 on the left side and the road surface 12 on the right side of the drawing.
The slope structure A according to the present invention includes a foldable cell structure 20 laid on the lower road surface 12, a filling material 30 filling the cell space of the expanded cell structure 20, and the cell structure 20. A grid material 40 that is laid on the upper surface of the metal material and seals the filling material 30 and a protective layer 50 that covers the grid material 40 are provided.

<2> Cell structure The cell structure 20 includes a plurality of strip-like sheets arranged in parallel in the width direction, which are repeatedly staggered at predetermined intervals and partially joined by heat fusion or the like, and orthogonal to the width direction. This is a foldable three-dimensional honeycomb structure in which a plurality of cells 21 are formed in a honeycomb shape by extending in the direction.

<2.1> Material The cell structure 20 having a porous structure or a nonporous structure is formed of a resin or a fiber material excellent in weather resistance and durability, or a composite material thereof. As the cell structure 20, for example, “Celdem (registered trademark)” (manufactured by Maeda Kosen Co., Ltd.) can be used.
The cell structure 20 has a plurality of open cells 21.
Considering transportability and handling, it is better to subdivide into weight units that can be handled manually.
In storage, several types of cell structures 20 having different height dimensions may be prepared.

<2.2> Inclined surface The cell structure 20 has an inclined surface 22 formed on the upper surface or the lower surface thereof, and the height gradually decreases from one side to the other in the development direction.
The inclined surface 22 can be easily formed by cutting one side obliquely while the cell structure 20 is folded in a factory equipped with cutting equipment.
The height of the cell structure 20 is lower than the height of the step surface 13.
The inclined surface 22 is formed in order to use the upper surface as a slope surface when the cell structure 20 is expanded, and the gradient θ is appropriately selected in consideration of the expansion length of the cell structure 20 and the like.

<3> Filling material As the filling material 30, hard granular materials such as earth and sand, crushed stone, gravel and concrete glass can be used.

<4> Grid material The grid material 40 is a mesh-like or sheet-like member laid between the upper surface of the cell structure 20 and the protective layer 50. For example, a resin-made geogrid, diamond-shaped wire mesh, welded wire mesh, or the like is used. be able to. In consideration of weather resistance and storage space, a geogrid is preferable.
The size of the grid material 40 should just be a dimension which can seal between the upper part of the some cell 21 at least.
The reason why the grid material 40 is used is to increase the restraint of the filling material 30 and the protective layer 50 filled in each cell 21.

<5> Protective layer The protective layer 50 is a protective material for the cell structure 20 and the grid material 40, and for example, a hard granular material such as crushed stone can be used.

[Slope structure construction method]
Next, the construction method of the slope structure A will be described.

<1> Storage of materials Since road management facilities are deployed on main arterial roads, it is preferable to store materials such as the cell structure 20 and the grid material 40 constituting the slope structure A in these facilities. . If a step is expected, a dedicated storage facility can be provided in the vicinity.
The cell structure 20 can be folded and stored, and when the grid member 40 has flexibility, it can be wound and stored in a roll shape, so that the storage space for the material can be small.
Furthermore, since the cell structure 20 and the grid material 40 are formed of a material that is significantly superior in weather resistance compared to a bag body for a sandbag, long-term storage is possible, and maintenance during storage is not necessary in principle.

<2> Carrying material on site At the time of a disaster, the cell structure 20 or the like having a height corresponding to the level difference is loaded into a transport vehicle and transported to the site.
Since the cell structure 20 and the grid material 40 can be loaded and unloaded by a worker, no special equipment is required.

<3> Expansion of Cell Structure and Filling of Filling Material Referring to FIG. 3, after the cell structure 20 carried into the site is expanded on the road surface 12 on the lower side, it is inserted inside and outside each cell 21. A temporary slope structure having a slope surface on the upper surface is constructed by charging the filling material 30 and further flattening it along the upper surface of the cell structure 20.

When laying the cell structure 20, the higher side of the cell structure 20 is brought into contact with and opposed to the step surface 13 of the road surfaces 11 and 12, and the lower side of the cell structure 20 is separated from the step surface 13.
In the present invention, since the filling material 30 can be reliably restrained by covering the upper surface of the cell structure 20 with the grid material 40 and the protective layer 50, compaction of the filling material 30 by a compactor can be omitted.

  The step surfaces 13 of the road surfaces 11 and 12 are rarely flat and often have irregularities in the vertical and horizontal directions. In the present invention, the flexibility of the cell structure 20 can be used to follow the concavo-convex shape of the step surface 13, and therefore, the work of cutting the concavo-convex step surface 13 flat is unnecessary.

<4> Covering Grid Material Referring to FIG. 4, the grid material 40 is cut in accordance with the slope length at the site.
And the grid material 40 which has continuity over the whole upper surface of the cell structure 20 is laid, and the filling material 30 thrown in in each cell 21 is sealed.
When the width of the road surface 12 exceeds the transverse width dimension of the grid member 40, a plurality of grid members 40 directed in the developing direction of the cell structure 20 are laid along the width direction of the road surface 12.

<5> Covering of the protective layer Finally, as shown in FIG. 2, crushed stones are spread on the surface of the grid material 40 to form the protective layer 50, and the construction of the slope structure A having a substantially wedge shape is completed. .
By appropriately selecting the layer thickness of the protective layer 50, the unevenness adjustment with the upper road surface 11 can be performed.
By performing the series of operations described above only with the human power of the worker, it is possible to construct the slope structure A having a slope running surface that is continuous across the road surfaces 11 and 12 having a height difference.

<6> Continuous travel of large vehicle In FIG. 2, the cell structure 20 constrains the filling material 30 in a plurality of sections, thereby causing an interlocking effect between the hard granular materials constituting the filling material 30 and the cell structure. Combined with the restraining action of the filling material 30 by the body 20 and the grid material 40, and further by adding the reinforcing action of the protective layer 50 by the grid material 40, the slope structure A can be compressed, sheared, bent, and dusty. It can be set as a structure with high property.
Furthermore, since the grid material 40 and the protective layer 50 covering the upper surface of the cell structure 20 cooperate to disperse and transmit the load, it is effective that some of the filling materials 30 are locally deformed. Can be suppressed.
In addition, since the grid material 40 reinforces the protective layer 50, it is difficult to cause wrinkles in the protective layer 50.
Therefore, the slope structure A provided on the stepped portions of the road surfaces 11 and 12 enables the heavy-duty large emergency vehicle to continuously travel.

[Slope structure removal method]
When temporary paving is performed on the stepped portion after the role of emergency measures is completed, it is necessary to remove the slope structure A. With reference to FIG. 5, an example of the removal method of the slope structure A is demonstrated.

<1> Batch removal of cell structure and grid material A part of the peripheral part of the grid material 40 and a part of the peripheral part of the cell structure 20 are connected to a hook of a simple crane (not shown), and the cell structure 20 and the grid The material 40 is lifted simultaneously.
As the grid material 40 is lifted, a hard granular material such as crushed stone constituting the protective layer 50 falls through the opening of the grid material 40 or slides down the surface of the grid material 40.
As the cell structure 20 is lifted, a hard granular material such as crushed stone constituting the filling material 30 falls through the bottom opening of each cell 21 of the cell structure 20.
In this way, the slope structure A can be dismantled and removed in a very short time by a simple operation of lifting the cell structure 20 and the grid material 40 simultaneously.
In addition, hard granular materials, such as a crushed stone which remain | survived on the road surface 12, can be used as a roadbed material of temporary pavement.

<2> Separation and Removal of Cell Structure and Grid Material As another removal method of the slope structure A removal method, the cell structure 20 may be lifted and removed after the grid material 40 is lifted and removed first. .

[Other embodiments]
With reference to FIGS. 6-8, the slope structure A applicable when a level | step difference is large is demonstrated. In the description, the same parts as those described above are denoted by the same reference numerals, and detailed description thereof is omitted.

<1> Outline of Cell Structure A slope structure A according to this example includes a raised slope body 60 having a wedge-shaped cross section formed on a lower road surface 12 in contact with a step surface 13, and an upper surface of the raised slope body 60. A foldable cell structure 20 laid between the slope surface 61 and the road surface 12 positioned in the extending direction of the slope surface 61, and a filling material 30 filled in the cell space of the expanded cell structure 20, A grid member 40 that is laid on the upper surface of the cell structure 20 and seals the filling material 30 and a protective layer 50 that covers the grid member 40 are provided.

<2> Raised slope body The raised slope body 60 is a structure excellent in pressure resistance for compensating for the insufficient height of the cell structure 20, in other words, a structure that raises a part of the slope structure A. It is.
A slope surface 61 having a predetermined gradient is formed on the upper surface of the raised slope body 60.
As the raising slope body 60, for example, hard granular materials such as earth and sand, crushed stone, gravel, and concrete glass can be ground and formed.
As another material of the raised slope body 60, it is also possible to use a foamed polystyrene body having a substantially wedge-shaped cross section.

<3> Cell Structure In the previous embodiment, the inclined surface 22 is formed over the entire length of the cell structure 20.
In this example, as shown in FIG. 7, a cell structure 20 having an inclined surface 22 formed in a part thereof is used.
That is, the cell structure 20 placed on the slope surface 61 of the raised slope body 60 has a uniform height on the left side of the drawing, and the cell structure 20 placed on the road surface 12 behind the raised slope body 60 An inclined surface 22 is formed at a site on the right side of the drawing, and its height gradually decreases from one side of the developing direction to the other side.

<4> Construction Method of Slope Structure Next, a construction method of the slope structure A will be described.

<4.1> Construction of Raised Slope Body With reference to FIG. 8, the raised slope body 60 having a wedge shape in cross section is formed on the lower road surface 12 in contact with the step surface 13.
The higher side of the raised slope body 60 is in contact with the step surface 13, and the lower side of the raised slope body 60 is spaced from the step surface 13.
When the raised slope body 60 is constructed by crushing hard granular materials such as crushed stone, compaction by a compactor can be omitted.
Further, a civil engineering sheet 65 is laid on the entire slope surface 61 as necessary.

<4.2> Subsequent Work As described with reference to FIG. 7, the slope surface 61 of the raised slope body 60 and the road surface 12 positioned on the extension of the slope surface 61 are used as support surfaces in the same manner as described above. The cell structure 20 is expanded and installed, and the filling material 30 is charged into the cell 21 of the cell structure 20. The grid material 40 is laid on the upper surface of the cell structure 20. The slope structure A is constructed through the covering operation of the protective layer 50.

<5> Method for Removing Slope Structure The method for removing the slope structure A in this example is basically the same as the embodiment described above.

<6> Operational effect of this example In this example, even if the step is large and the height of the cell structure 20 is insufficient, the raised slope body 60 is formed to raise the stepped portion side. The shortage of the height of the cell structure 20 can be compensated only by adding work.
Therefore, even if the cell structure 20 having a long overall length is not specially manufactured, a large step generated between the road surfaces 11 and 12 can be eliminated by using the inexpensive cell structure 20 that is commercially available. It is possible to provide the slope structure A capable of continuously running the vehicle.

A ··· Slope structure 11 ··· Lower side road surface 12 · · · Upper side road surface 13 ··· Step surface 20 · · · Cell structure 21 ··· ... Cell 22 ... Inclined surface 30 ... Filling material 40 ... Grid material 50 ... Protective layer 60 ... Raised slope body 61 ... ..Slope surface

Claims (4)

A slope structure for a road surface step portion that is installed on a step portion of a road surface to form a slope surface,
A foldable cell structure laid on the lower road surface;
A filling material to be filled in the cells of the expanded cell structure;
A grid material that is laid on the upper surface of the cell structure and seals the filling material;
Covering the grid material, comprising a protective layer that forms a slope running surface on the upper surface,
The cell structure has a three-dimensional honeycomb structure having a plurality of cells open at the top and bottom, and an inclined surface is formed on one side so that the height gradually decreases from one to the other in the development direction. ,
The cell structure is deployed and laid so that the higher side of the cell structure faces the step surface of the road surface and the lower side of the cell structure is separated from the step surface,
In addition to restraining the displacement of the filling material in cooperation with the cell structure, the grid material restrains the displacement of the protective layer,
Slope structure for road surface steps.   A cross-sectional shape has a wedge shape, and further includes a raised slope body for raising having a slope surface on the upper surface, and the cell structure is placed on the slope surface of the raised slope body installed on the road surface. The slope structure for a road surface step portion according to claim 1, wherein the slope structure is raised.   The slope structure for a road surface step portion according to claim 1, wherein the filling material and the protective layer are hard granular materials.   The slope structure for a road surface step part according to claim 2 or 3, wherein the raised slope body is a hard granular body.

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