JP3714653B2 - Foamed resin block for embankment, embankment unit using the same, construction body comprising embankment unit, and embankment construction method - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a foamed resin block for embankment, a unit for embedding using the embedding resin block, a construction unit composed of a unit for embankment, and a method for embankment construction, which are particularly suitable for use in locations where the water level may rise.
[0002]
[Prior art]
In recent years, a method of stacking foam synthetic resin blocks instead of soil has been widely used to reduce load and earth pressure on soft ground, steep sloped earth, structure backfilling, upright walls, etc. Yes.
[0003]
Such a construction method is generally called an EPS construction method, but such a construction method has the following advantages, for example.
That is,
(1) The unit volume weight of the foamed resin block is about 1/100 that of earth and sand, and when applied as embankment on soft ground, the embankment load can be greatly reduced and handling is easy because of easy handling. It is.
[0004]
(2) Unlike soil, even in the plastic region, the compressive force in the uniaxial direction is excellent, and there is no clear shear region.
(3) Self-supporting property is good, and even when stacked upright, a self-supporting surface is formed, and even when a load acts on the surface, deformation to the side is extremely small. Therefore, when it is used as a backing material such as an abutment or a retaining wall, the earth pressure on the back can be greatly reduced.
[0005]
(4) Since it is a synthetic resin foam containing closed cells, there is no change in material properties due to water absorption under normal construction conditions, and water resistance is excellent.
(5) Since a large construction machine is not required for stacking and construction can be performed manually, the construction speed is fast and construction at a place where it is difficult to use a large machine such as an inclined land is easy.
[0006]
[Problems to be solved by the invention]
By the way, even if such foamed resin blocks for embankments are light, when used on soft ground, the foamed resin block itself is used in the event of rising water levels, seasonal rainfall, flooding, etc. In such a case, there is a problem that a very large buoyancy acts on the foam block.
[0007]
In view of such a problem, the present invention, for example, when used in a place where the water level is likely to rise, there is no risk of floating, and as a result, the foamed resin for embankment that has excellent drainage capacity when the water withdraws. The object is to provide a block, a unit for embedding using the block, a structure including the unit for embankment, and a method for constructing the embankment.
[0008]
[Means for Solving the Problems]
The foamed resin block for embankment according to the present invention for achieving the above object is
In the foamed resin block main body, a plurality of water reservoirs are formed in a substantially lattice shape, and a vertical groove is formed in at least two side walls of each water reservoir, and one surface of the lattice-like water reservoir is integrally covered. And a drainage groove is provided on the outer surface of the ceiling plate, and a plurality of small holes penetrating from the bottom of the drainage groove into the water reservoirs are formed.
[0009]
Moreover, the foamed resin block for embankment according to the present invention is
One end of the vertical groove opens to the opening surface side where the ceiling plate is not disposed, and the other end of the vertical groove is formed away from the ceiling plate by a predetermined distance. .
[0010]
Moreover, the foamed resin block for embankment according to the present invention is
The outermost wall of the foamed resin block main body is formed with a plurality of recessed portions extending in the vertical direction.
[0011]
The embankment unit according to the present invention is characterized in that the opening surfaces of any one of the two embankment resin foam blocks are matched.
According to such a foamed resin block for embankment and a unit for embankment using the same, water has entered from the upper surface and / or the lower surface through small holes, vertical grooves or water reservoirs, and the water level has risen. However, since the buoyancy of the foamed resin block is small, it is prevented that the foamed resin block itself is lifted, and the influence on the structure is small. Further, when the water level falls, the water in the water reservoir is discharged outward through the small holes and the vertical grooves.
[0012]
Moreover, the structure using the block for embankment which concerns on this invention is characterized by loading the said block for embankment in the same direction.
Moreover, the construction using the foamed resin block for embankment according to the present invention is characterized in that a plurality of embankment units are prepared and these embankment units are stacked in multiple stages.
[0013]
According to such a structure, it can be loaded in a stable state as a fill instead of soil on soft ground or the like. In addition, water can be easily taken into and discharged from the water reservoir. Moreover, the water discharged | emitted by the butt | matching part of the unit for embankment can be guided below via the said recessed part.
[0014]
The embankment construction method according to the present invention is
The above-mentioned foamed resin block for embankment is placed in place of soil at the place where the water level rises, and when the water level rises, water is poured into the water reservoir of the resin foam block through a small hole or vertical groove. While taking in, when the water level falls, it is characterized by discharging water outward through a small hole or a longitudinal groove.
[0015]
According to such embankment construction method, instead of soil, when applied to embankment on soft ground, steep slope embankment, structure backfill, upright wall, etc., it can be stably loaded Even if the water rises, it does not float up, and drainage is easy, which is suitable as an embankment replacing soil.
[0016]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below with reference to the drawings.
1 to 4 show a foamed resin block for embankment according to an embodiment of the present invention. FIG. 1 is a partially broken perspective view, FIG. 2 is a plan view, FIG. 3 is a bottom view, and FIG. It is sectional drawing. In addition, since this foamed resin block for embankments is used as a set of two, there is no distinction between the upper and lower sides, but for convenience, FIG. 1 is a perspective view when viewed upside down.
[0017]
Specifically, the foamed resin block 1 for embankment is a resin foam that is integrally molded by foaming synthetic resin, such as foamed polystyrene, foamed polyurethane, foamed polyvinyl chloride, and foamed polyolefin. Unit volume weight is 0.030-0.100 t / m < ³ >, for example, and the thing of about 0.050 t / m < ³ > is used in the Example. Since such a foamed resin block 1 for embankment is a foam, it is light and easy to handle as a whole, and subsidence does not occur even on soft ground by taking advantage of its buoyancy.
[0018]
The size of the foamed resin block 1 for embankment is not particularly limited, but a resin foam having a large size such as 1000 × 1000 × 250 mm is preferable in terms of work efficiency.
[0019]
The embankment foamed resin block 1 has a foamed resin block main body 1a with one side opened, and the other side is covered with a flat ceiling plate 5.
Further, the foamed resin block main body 1a is provided with a lattice-like partition wall 4 on the whole so that the strength against the load is not weakened, and water can be stored between these two water reservoirs 2. Is defined. In addition, the thickness of the partition wall 4 at the time of providing the water reservoir 2 divided into 16 as in the embodiment is about 60 mm, and the thickness of the partition wall 4 increases from the opening end toward the base end side. The thickness is getting thicker. These thicknesses are set to appropriate values depending on the size of the water reservoir 2 and the like so as to withstand the load. Furthermore, longitudinal grooves 3 are formed in the thickness direction on the four side walls of the water reservoir 2. The vertical grooves 3 formed in the water reservoir 2 are preferably formed on all four side walls in consideration of the flow of water, but may be two side walls. Moreover, when forming the vertical groove 3 in two side walls, it is preferable that it is two side walls which mutually oppose. Two or more longitudinal grooves 3 may be formed on one partition wall 4. Further, the length of the longitudinal groove 3 is about half the height of the foamed resin block main body 1a in the embodiment, but the length is not limited as long as water can be circulated to the surroundings. For example, it may be about 10 mm. In short, it is only necessary that one end 3 a is open in the opening surface of the foamed resin block main body 1 a and the other end 3 b is separated from the ceiling plate 5.
[0020]
Thus, even in the foamed resin block main body 1a provided with the water reservoir 2 and the longitudinal groove 3, since the base end side of the partition wall 4 is all connected and has an integral structure, a heavy load is applied on the base end side. In this case, there is little deformation and sufficient proof stress is exhibited. Therefore, if earth and sand are backfilled in the upper part, a car can pass on it.
[0021]
On the other hand, on the outer surface of the ceiling board 5, as shown in FIG. 2, for example, a drainage groove 7 having a U-shaped radial expansion is formed on the entire surface. Furthermore, a small hole 8 extending from the bottom surface toward the water reservoir 2 is formed through the drain groove 7.
[0022]
In this embodiment, four small holes 8 are opened in one water reservoir 2, but the number of small holes 8 is not limited to the embodiment. In addition, the magnitude | size of the small hole 8 has a magnitude | size of 10 mm in an Example.
[0023]
Moreover, the recessed part 11 is formed in the up-down direction around the vertical groove 3 in the outermost wall of the foamed resin block main body 1a. By providing the recessed portion 11, a gap is formed between adjacent block bodies when the two foamed resin block bodies 1a are abutted in the lateral direction.
[0024]
The embankment foamed resin block 1 according to the present embodiment is formed as described above, and an example of its use will be described below.
This foamed resin block 1 for embankment can be suitably used as a embankment material in places with a lot of water, including soft ground such as lakes and marshes. Furthermore, it can be used in place of soil in various sites such as ordinary road embankments, landslide embankments, widening embankments, steep slope widening embankments, waterway foundations, hypothetical roads, buried pipe foundations and protection. In that case, as shown in FIG. 5, the opening surfaces of the foamed resin block 1 for embankment can be made to match each other and used as one unit.
[0025]
Thus, the embankment unit 20 which has a hollow part inside is comprised by making two opening foam resin blocks 1 match each other's opening surfaces.
In such embankment unit 20, the receiving area between the pair of embedding foam resin blocks 1 is large, and the base side is all connected integrally, so that deformation hardly occurs even when a load is applied. ing.
[0026]
By superposing the embankment unit 20 as one unit in the height direction and the width direction, the foamed resin block can be laid in a predetermined range instead of the soil. When arranged in this way, in each unit 20, the grid-like partition walls 4 are abutted at predetermined intervals, so that these partition walls 4 become pillars such as ribs to increase the compressive strength against the load. Can be maintained.
[0027]
Note that, between the embankment units 20 stacked in the vertical direction, any drainage groove 7 communicates with each other, but the small holes 8 do not necessarily communicate linearly. When such embankment units 20 are stacked in the up / down / left / right direction, when rain or the like falls and water approaches from above, for example, water flows through the drain grooves 7 on the outer surface, and further a small hole is provided. The water can be taken into the water reservoir 2 through 8 or through the surrounding vertical groove 3. Thereby, the specific gravity of this foamed resin block 1 can be raised, it becomes a counter with respect to buoyancy, and the buoyancy when submerged with water can be suppressed as much as possible. Moreover, when it piles up in steps, water flows down from the upper embankment unit 20 side to the lower embankment unit 20 side. In this case, the drain grooves 7 and 7 between the two units Since these portions communicate with each other, they can flow through the drain grooves 7 and be taken into the water reservoir 2 in the lower unit 20. Further, since the vertical groove 3 is not in communication with the ceiling plate 5, the water accumulated in one embankment unit 20 does not flow outward as it is and can be held around the ceiling plate 5. it can.
[0028]
Moreover, since the recessed part 11 is formed at predetermined intervals between the foamed resin blocks 1 and 1 arranged in the horizontal direction, the water flowing to the abutting part of the adjacent block is quickly flowed downward. be able to. Therefore, water does not stay in the lateral butting portion.
[0029]
Therefore, according to the present invention, even if the foamed resin block 1 for embankment is submerged, it can be prevented from being lifted by water taken inside. Moreover, when the water level falls, the water stored in the water reservoir 2 can be quickly discharged in the vertical direction or the horizontal direction via the vertical groove 3 and the small hole 8 or the recessed portion 11.
[0030]
On the other hand, in place of water from above, even when groundwater or the like has risen from below, via the small holes 8 of the lower embedding foam resin block 1 constituting the embankment unit 20 or the surrounding vertical grooves 3, Water can be taken inside. In that case, since the small hole 8 of the upper foamed resin block 1 constituting the embankment unit 20 functions as an air hole, the air inside the water reservoir 2 can be quickly released outward. Thereby, the penetration | invasion of water can be performed rapidly.
[0031]
Thus, according to the foamed resin block for embankment according to the present invention, even when used on soft ground where water rises from below, these can be easily stacked, and measures against buoyancy can be taken. It can be carried out.
[0032]
In addition, as a structure using the foamed resin block for embankment, it can be used in various fields. For example, landslide embankment, park embankment, widening embankment, steep slope widening embankment, waterway foundation, buried pipe foundation It can be applied to various structures such as embankments around U-grooves, temporary roads, and embankments on the back of embankments.
[0033]
According to the present invention, the adjacent water reservoirs 2 communicate with each other through the vertical groove 3, the drainage groove 7 is provided in the ceiling plate 5, and the small hole 8 is formed in the drainage groove 7. Even if the water approaches from the upper, lower or side directions, and the water level is at the position of the height 26, as shown in FIG. 7, these water can be quickly taken into the interior. . At the same time, when the water withdraws from the surroundings, the internal water can be quickly discharged vertically or laterally.
[0034]
Therefore, even when submerged, the load does not remain in the foamed resin block.
Further, in the embankment unit 20 according to the present embodiment, the upper and lower opening surfaces are respectively closed by the ceiling plate 5, so that the workability is good without dropping a tool or the like inside the laying work. It is.
[0035]
As mentioned above, although one Example of this invention was described, this invention is not limited to the said Example.
For example, as shown by A in FIG. 5, an uneven fitting that can be fitted to each other when the foamed resin block main body 1 a is assembled to form a pair of two foamed resin block main bodies on the opening end surface of the foamed resin block main body 1 a. It is preferable to form the joint portion because the positioning of the both becomes easy.
[0036]
If an appropriate number of such concave-convex fitting portions are provided at appropriate locations on the opening end face, positioning can be facilitated when the embankment unit 20 is configured by assembling two foamed resin blocks, and the left and right sides in the assembled state There will be no shift in the direction. Moreover, such an uneven | corrugated fitting part may be what kind of fitting.
[0037]
Furthermore, the overall shape of the drain groove 7 in the above embodiment is not limited to the embodiment. The drain groove 7 may have any other shape as long as it can guide the water collected on the outer surface into the water reservoir 2. Furthermore, when using the above foamed resin block as embankment, as shown in FIG. 6, such embankment unit 20 is arranged only in the lower layer portion that is easily submerged, and the surface layer without fear of submergence. In the part, it is also possible to arrange normal foamed resin blocks 31 having a dense structure without a space part.
[0038]
In this way, two types of foamed resin blocks can be divided into an upper layer and a lower layer, and the surroundings can be buried with soil 22, and the upper portion thereof can be finished with quarry 23 or asphalt 24.
[0039]
Thus, if several units of embankment 20 are loaded, as shown in FIG. 7, it was a case where the water | moisture content was pushed up from the upper part, and when the water | moisture content rose from the lower part, However, the surrounding water can be quickly taken into the water reservoir 2 through the small holes 8 or the vertical grooves 3, and the drainage is also good.
[0040]
Further, in the above embodiment, the embedding unit 20 is constructed by matching the opening surfaces of the resin foam blocks 1, but instead of this, for example, as shown in FIG. A polyethylene sheet 15 or the like can be laid on the top, and a plurality of foamed resin blocks 1 can be stacked in multiple stages in the same direction on the top. Even with such a construction 40, water can be stored in the internal water reservoir 2, and the drainage is also good.
[0041]
Moreover, in the said Example, although the vertical groove 3 was formed in the four side walls of each water reservoir part 2, respectively, as shown in FIG. 9, for example, the foaming resin block 50 for embankment which has the water reservoir part 2 divided into 8 etc. In this case, the vertical grooves 3 may be formed on the two side walls without forming the vertical grooves 3 on all the side walls. As described above, the number of the longitudinal grooves 3 formed in the water reservoir 2 is not limited to the above-described embodiment, and may be formed at least on the two side walls. Moreover, when limiting to two side walls, it is preferable that it is two side walls which mutually oppose.
[0042]
Even with such a longitudinal groove 3, water can be introduced into the water reservoir 2.
[0043]
【The invention's effect】
As described above, according to the foamed resin block for embankment according to the present invention and the unit for embankment using the block, even when the water is submerged from the water from above or below, The buoyancy can be reduced as much as possible because the water can be quickly taken into the water reservoir defined inside the foamed resin block main body through the longitudinal grooves, drainage grooves and small holes. On the other hand, when the water level drops, the water can be quickly discharged vertically and horizontally, so that the embankment unit does not become heavy. Moreover, the hole formed in the ceiling board can function as an air hole when it is desired to store water.
[0044]
Moreover, since the recessed part is formed in the outermost wall of a foamed resin block main body, the water which stays between the foamed resin blocks adjacent to a horizontal direction can be rapidly flowed down.
[0045]
Furthermore, according to the embankment unit according to the present invention, the lattice-like side walls constituting the water reservoir are all connected to the base side and have an integral structure, so that the strength against the load can be sufficiently maintained.
[0046]
Moreover, according to the construction body according to the present invention, it is possible to construct a wall surface or the like instead of soil in a place where it is not desired to apply a load, and it is lightweight, has good workability, and water is flooded. However, the buoyancy can be suppressed as much as possible. Moreover, when water withdraws, it can drain quickly through a longitudinal groove, a small hole, a drainage groove, and a recessed part. Further, since the side wall of the water reservoir that spreads in a lattice shape is an integral structure in which the base side is connected, it has a sufficient compressive strength, and therefore a vehicle or the like can be passed over the structure.
[0047]
Moreover, according to the embankment construction method according to the present invention, since the partition walls exist in a lattice shape, the compressive strength against the load can be maintained on average. In addition, water can be taken in and discharged from either the vertical direction or the horizontal direction.
[0048]
As described above, according to the embankment construction method according to the present invention, it has sufficient measures against buoyancy and has good drainage. Therefore, the embankment construction method can be preferably used as a embankment method in place of soil for soft ground.
[Brief description of the drawings]
FIG. 1 is a perspective view showing a partially cut resin foam block for embankment according to one embodiment of the present invention.
FIG. 2 is a plan view of the foamed resin block.
FIG. 3 is a bottom view of the foamed resin block.
FIG. 4 is a cross-sectional view of the foamed resin block.
FIG. 5 is a cross-sectional view of a banking unit in which two foamed resin blocks are combined.
FIG. 6 is a cutaway perspective view of an embankment road constructed by the embankment construction method according to the present invention.
FIG. 7 is a cross-sectional view showing the operation of the embankment unit according to the present invention.
FIG. 8 is a cross-sectional view showing another structure according to the present invention.
FIG. 9 is a bottom view of a foamed resin block for embankment according to another embodiment of the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Foamed resin block 1a Foamed resin block main body 2 Water reservoir part 3 Vertical groove 3a One end part 3b Other end part 7 Drainage groove 8 Small hole 20 Embankment unit 50 Foamed resin block for embankment

Claims (7)

In the foamed resin block main body, a plurality of water reservoirs are formed in a substantially lattice shape, and a vertical groove is formed on at least two side walls of each water reservoir, and one surface of the lattice-like water reservoir is integrally covered. A foamed resin block for embankment, in which a drainage groove is provided on the outer surface of the ceiling plate, and a plurality of small holes penetrating from the bottom of the drainage groove into the water reservoirs are formed. One end of the vertical groove opens to the opening surface side where the ceiling plate is not disposed, and the other end of the vertical groove is formed a predetermined distance away from the ceiling plate. The foamed resin block for embankment according to claim 1. 2. The foamed resin block for embankment according to claim 1, wherein the outermost wall of the foamed resin block main body is formed with a plurality of recessed portions extending in the vertical direction. The embankment unit characterized by matching the opening surfaces of the two resin foam blocks for embankment according to any one of claims 1 to 3. A construction comprising the embankment blocks according to any one of claims 1 to 3 stacked in the same direction. A plurality of embankment units according to claim 4 are prepared, and the embedding units are stacked in multiple stages. The embankment unit according to claim 4 is disposed up to a height at which the water level rises, and when the water level is increased, water is taken into the water reservoir of the resin foam block through a small hole or a longitudinal groove, and the water level is increased. An embankment construction method using a foamed resin block for embankment, characterized in that, when lowered, water is discharged outwardly through a small hole or a longitudinal groove.

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