JP4044877B2 - Lightweight embankment for road - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a light weight embankment for roads, and more particularly to a light weight embankment for roads constructed by stacking synthetic resin foam blocks in order to construct an inclined road.
[0002]
[Prior art]
Conventionally, a lightweight embankment is constructed by stacking synthetic resin foam blocks, and the embankment for road widening formed on the mountainside is reduced by reducing the weight of road embankment constructed on soft ground to reduce its weight. It is known to reduce the load applied to the valley side protection wall (see, for example, Patent Document 1).
[0003]
[Patent Document 1]
Japanese Patent Laid-Open No. 2002-30663
[Problems to be solved by the invention]
In the conventional lightweight embankment constructed by stacking synthetic resin foam blocks on the base surface, the synthetic resin foam blocks are stacked horizontally so that the synthetic resin foam blocks can be stably stacked. . In addition, an upper concrete floor slab is provided on the stacked synthetic resin foam blocks to stabilize the stacked state by pressing the synthetic resin foam blocks and to support the pavement and traffic load in a distributed manner. The upper concrete slab is also installed horizontally. In particular, when building an inclined road, the base surface is stepped in the road length direction, the synthetic resin foam block and the upper concrete floor slab are installed horizontally, and the upper surface of the concrete floor slab is in the road length direction. It is stepped.
[0005]
By the way, when comprising a slope, the guardrail foundation for attaching a guardrail is normally integrally provided in the edge of an upper concrete floor slab. For this guardrail foundation, off-the-shelf products can be obtained at a low cost, but it is difficult to mount on the upper concrete floor slab that has a staircase shape. There is a problem that the cost is not obtained.
[0006]
The present invention has been made in view of the above-described conventional problems. A lightweight embankment for roads in which synthetic resin foam blocks are stacked on a base surface and an upper concrete floor slab is provided on the synthetic resin foam blocks. The purpose is to make it possible to form the upper surface of the upper concrete floor slab as a series of slopes when building ramps, and to easily use off-the-shelf structures such as guardrail foundations.
[0007]
[Means for Solving the Problems]
For the above purpose, a first aspect of the present invention is a lightweight embankment for roads in which synthetic resin foam blocks are stacked on a base surface, and an upper concrete floor slab is provided on the synthetic resin foam blocks. While the uppermost synthetic resin foam blocks are stacked stepwise in the road length direction, the upper concrete floor slab fills the steps between the synthetic resin foam blocks stacked in a staircase pattern, and the top surface is a series. In addition, the upper concrete floor slab is provided with a stopper portion on the upper surface of the upper concrete floor slab that suppresses the displacement of the roadbed material along the inclination of the upper surface. A lightweight embankment is provided.
[0008]
By the way, according to the knowledge of the present inventors, the synthetic resin foam block is lightweight and has a large surface frictional resistance. Thus, a sufficiently stable stacked state can be obtained. And if the synthetic resin foam block is inclined, the upper concrete floor slab can also be inclined, and the upper concrete floor slab upper surface can be formed as a series of slopes in the road length direction. The second aspect of the present invention has been achieved by installing the apparatus at an angle rather than horizontally.
[0009]
That is, the second aspect of the present invention is a lightweight embankment in which a synthetic resin foam block is stacked on a foundation surface and an upper concrete floor slab is provided on the synthetic resin foam block. The synthetic resin foam block and the upper concrete floor slab are inclined along the inclination of the foundation surface, and the upper surface of the upper concrete floor slab is along the inclination of the upper surface. The present invention provides a light-weight embankment for roads, which is provided with a stopper portion that suppresses displacement of the roadbed material.
[0010]
The second aspect of the present invention includes, as a preferred embodiment, that the synthetic resin foam blocks adjacent to each other in the vertical direction are connected.
[0011]
By the way, when the upper surface of the upper concrete floor slab is formed as a series of slopes, for example, roadbed materials such as gravel and split chestnut are easily displaced and become unstable. Therefore, in the first and second aspects of the present invention, the synthetic resin foam block and the upper floor slab are installed at an inclination, and the deviation of the roadbed material can be suppressed.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, the present invention will be further described with reference to the drawings.
[0013]
1-4 is a figure which shows an example of this invention, FIG. 1 is sectional drawing of the road width direction which shows an example of the lightweight banking according to this invention, FIG. 2 is sectional drawing of the road length direction, FIG. FIG. 4 is an explanatory view of a state in which a roadbed material is laid on the upper floor slab, and FIG. 4 is an explanatory view of a state in which pavement is applied on the roadbed material.
[0014]
As shown in FIG. 1 and FIG. 2, the lightweight embankment for roads of this example is for constructing a road along a slope such as a mountainous area, for example, on a foundation surface 1 formed by excavating the slope. A lower concrete floor slab 2 is formed, and a synthetic resin foam block 3 is stacked thereon. In particular, as shown in FIG. 2, the foundation surface 1 is an inclined surface continuous in the road length direction of the road to be constructed, and the lower concrete floor slab 2 and the synthetic resin foam block 3 are installed inclined along the inclination. ing.
[0015]
An intermediate concrete floor slab 4 is sandwiched between the stacked synthetic resin foam blocks 3 at an appropriate interval in the height direction, and an upper concrete floor slab 5 is placed on the uppermost synthetic resin foam block 3. Is provided.
[0016]
The lower concrete floor slab 2 is provided for reinforcing and leveling the foundation surface 1 on which the synthetic resin foam block 3 is stacked. If necessary, the lower concrete floor slab 2 is placed on the foundation surface 1 at the stacking position of the synthetic resin foam block 3. It can be formed by placing bars and placing concrete. This lower concrete floor slab 2 is omitted only when the foundation surface 1 is leveled with sand, earth or sand, etc., when the foundation surface 1 is solid or the stacked height of the synthetic resin foam block 3 is low. can do.
[0017]
The synthetic resin foam constituting the synthetic resin foam block 3 stacked on the lower concrete slab 2 is preferably one having excellent strength and water resistance. For example, polystyrene foam, polyethylene foam, polyurethane foam Although a body etc. can be used, a polystyrene foam is especially preferable. In addition, the synthetic resin foam block 3 may be formed by extrusion molding or bead foam molding, but is preferably extruded foam molding in terms of strength.
[0018]
The intermediate concrete floor slab 4 is provided to stabilize the stacked state of the synthetic resin foam 3 and to reinforce it by distributing the load, and the reinforcement is placed on the synthetic resin foam block 3 stacked to a predetermined halfway height. It can be formed by applying and placing concrete. The intermediate concrete floor slab 4 is interposed as necessary, and can be omitted when the stacked height of the synthetic resin foam block 3 is not so high. The intermediate concrete slab 4 is also inclined and installed in the same manner as the lower concrete slab 2 and the synthetic resin foam block 3.
[0019]
The upper concrete floor slab 5 is used to form the foundation of the road surface, protect the synthetic resin foam 3 from the impact of a passing vehicle, and disperse the load. The synthetic resin foam block 3 is placed at a required height. After stacking, it can be formed by placing reinforcement on the uppermost synthetic resin foam block 3 and placing concrete. This upper concrete floor slab is also inclined and installed in the same manner as the lower concrete floor slab 2 and the synthetic resin foam block 3.
[0020]
On the upper surface of the upper concrete floor slab 5, a stopper portion 6 protruding upward is formed so as to cross the upper concrete floor slab 5 in the road width direction and at an appropriate interval in the road length direction. The stopper portion 6 in this example is formed integrally with the upper concrete floor slab 5 by partially projecting the upper surface of the upper concrete floor slab 5 into a dam shape.
[0021]
As shown in FIGS. 3 and 4, a roadbed material 7 is laid on the upper concrete slab 5, and a pavement 8 is further provided on the roadbed material 7. Here, the roadbed material 7 is gravel, split chestnut, earth and sand, sand, etc. laid as a base of the pavement 8.
[0022]
In the present invention, as described above, the upper concrete floor slab 5 is inclined and the upper surface of the upper concrete floor slab 5 forms an inclined surface that is continuous in the road length direction of the road to be constructed. Therefore, when the upper surface of the concrete slab 5 is a flat inclined surface, when the roadbed material 7 is laid, slippage is caused by this inclination, which may cause instability. In the present invention, the stopper portion 6 is provided to prevent the roadbed material 7 from becoming unstable. By providing the stopper portion 6, the roadbed material 7 can be easily laid with a uniform thickness, and further, the roadbed material 7 can be prevented from being displaced due to traffic vibration after the formation of the pavement 8 and being damaged.
[0023]
On the other hand, a side wall 9 is formed along the side surface exposed to the valley side of the stacked synthetic resin foam blocks 3. This side wall 9 is for protecting the exposed synthetic resin foam block 3 from sunlight, fire, wind and rain, etc., and is formed so as to cover the exposed surface on the valley side.
[0024]
The side wall 9 is formed by connecting a large number of panel materials in the vertical and horizontal directions. The lower concrete floor slab 2 extends to the valley side with a gap between the side wall on the valley side of the synthetic resin foam block 3. It is launched from above. In addition, each panel material that constitutes the side wall 9 connected to the top, bottom, left, and right is sandwiched and fixed between the synthetic resin foam blocks 3 stacked at one end, and the other end protrudes to the side of the synthetic resin foam block 3. Is supported by the support bracket 10.
[0025]
The stopper portion 6 in the above example crosses the upper concrete slab 5 in the road width direction and is formed at an appropriate interval in the road length direction. However, as shown in FIG. You can also. Further, the stopper portion 6 is made of concrete integrally with the upper concrete floor slab 5, and as shown in FIG. 6, an embedded bolt 11 is installed when the upper concrete floor slab 5 is formed. Can be provided by fixing an angle material on the upper concrete slab 5.
[0026]
Next, another example of the present invention will be described with reference to FIG.
[0027]
The base surface 1 in this example is formed in a step shape, and the synthetic resin foam blocks 3 are respectively stacked almost horizontally on the lower concrete floor slab 2 formed in a step shape along the base surface 1. ing. That is, the synthetic resin foam block 3 in this example is subjected to level construction unlike the above-described example in which the construction is inclined.
[0028]
The synthetic resin foam blocks 3 are stacked such that the upper surface is stepped in the road length direction. A part of the upper synthetic resin foam block 3 shown in the figure is thinner than the synthetic resin foam block 3 below. This is for adjusting the inclination of the upper surface of the upper concrete slab 5 to be described later, and is appropriately selected depending on the slope of the road to be constructed.
[0029]
The upper concrete floor slab 5 in this example is formed so that the upper surface forms a series of slopes in the road length direction by filling the steps between the upper synthetic resin foam blocks 3 stacked in a stepped manner. Moreover, a stopper portion 6 is provided on the upper surface of the upper concrete floor slab 5. As described above, the stopper portion 6 is for suppressing the displacement of the roadbed material 7 (see FIGS. 3 and 4) along the inclination of the upper surface of the upper concrete floor slab 5.
[0030]
If comprised as mentioned above, formation of the base surface 1 and lamination | stacking of the synthetic resin foam block 3 can be performed in the procedure similar to the past, and an existing guardrail foundation etc. can be used as it is, without a big procedure change. become.
[0031]
【The invention's effect】
The present invention is as described above, and the upper concrete slab 5 can be installed such that its upper surface forms a series of inclined surfaces in the road length direction. Therefore, when installing a ready-made guardrail foundation etc. on the upper concrete floor slab 5, it can install easily, without taking time and effort. Further, the stopper portion 6 provided on the upper surface of the upper concrete slab 5 is less likely to be biased due to slippage of the roadbed material 7, and the laying work of the roadbed material 7 is hindered, or traffic vibration after completion of the roadbed material 7 It is possible to prevent the pavement 8 from being damaged and being damaged.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view in the road width direction showing an example of a light weight embankment according to the present invention.
FIG. 2 is a cross-sectional view in the road length direction of the light weight embankment shown in FIG.
FIG. 3 is an explanatory view showing a state in which a roadbed material is laid on an upper floor slab.
FIG. 4 is an explanatory diagram of a state in which paving is performed on a roadbed material.
FIG. 5 is a plan view showing another arrangement example of the stopper portion.
FIG. 6 is a cross-sectional view showing another example of a stopper portion.
FIG. 7 is a cross-sectional view in the road length direction showing another example of a light weight embankment according to the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Base surface 2 Lower concrete floor slab 3 Synthetic resin foam block 4 Intermediate concrete floor slab 5 Upper concrete floor slab 6 Stopper part 7 Roadbed material 8 Pavement 9 Side wall 10 Support metal fitting 11 Embedded bolt

Claims (3)

In the lightweight embankment for roads in which synthetic resin foam blocks are stacked on the base surface and the upper concrete floor slab is provided on the synthetic resin foam blocks, at least the uppermost synthetic resin foam blocks are in the road length direction. While being stacked in a staircase shape, the upper concrete floor slab is arranged so as to fill in the steps between the synthetic resin foam blocks stacked in a staircase shape, and the upper surface forms a series of slopes, In addition, a lightweight embankment for roads is provided with a stopper portion that suppresses displacement of the roadbed material along the inclination of the upper surface of the upper concrete slab. In the lightweight embankment for roads in which synthetic resin foam blocks are stacked on the foundation surface and the upper concrete floor slab is provided on the synthetic resin foam block, the foundation surface is inclined in the road length direction, and the synthetic The resin foam block and the upper concrete floor slab are disposed along the inclination of the foundation surface, and the upper surface of the upper concrete floor slab suppresses the displacement of the roadbed material along the inclination of the upper surface. Lightweight embankment for roads, which is provided with a stopper. The lightweight embankment for roads according to claim 2, wherein synthetic resin foam blocks adjacent to each other are connected to each other.

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