JP2007247354A - Lightweight banking construction, resin foam block body for the same, and its construction method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a lightweight banking construction capable of preventing road surface deformations caused by compressive deformation due to a load applied on it, creep settlement by a sustained load, etc. and reducing material costs by reducing the volume of a resin foam block body and excellent in stability and constitutive properties as a banking construction. <P>SOLUTION: The banking construction is constituted by vertically layering resin foam block bodies 2 etc. between a concrete floor plate 3 on the lower-surface side and a concrete floor plate 6 on the upper-surface side. The layered structure by the resin foam block bodies 2 etc. is continuous in a lattice shape in a plan view and provided with a longitudinal through hole 9 in a vertical direction at each cross part. The through holes 9 are provided with column bodies 7 structurally connecting the concrete floor plate 3 on the lower-surface side to the concrete floor plate 6 on the upper-surface side. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a lightweight embankment structure constituted by laminating resin foam block bodies such as polystyrene foam, a resin foam block body therefor, and a construction method thereof.

Conventionally, a block body obtained by molding a polystyrene foam into a rectangular parallelepiped has a very light weight of about 0.2 kN / m ³ per unit volume, and is excellent in compression resistance, water resistance, and self-supporting property at the time of lamination. For this reason, it is used as a fill material or backfill material for soft ground or confined places, or as a lightweight fill structure for roads, railways, three-dimensional intersections, or land creation. This construction method is called an EPS construction method, which is basically a method of accumulating a rectangular parallelepiped expanded polystyrene, but in recent years, several improved construction methods have been proposed.

  For example, in Patent Document 1 below, when a lightweight embankment structure is formed in a lightweight embankment structure in which resin foam blocks are stacked in layers to form a light embankment layer and a heavy load such as a roadbed is formed thereon, a steel bar and a nut are formed. A lightweight embankment structure is disclosed in which compression is applied to the lightweight embankment layer by appropriate means such as tightening by means of, compressing the expected initial settlement, and then constructing heavy objects such as road layers. .

In Patent Document 2 shown below, as shown in FIG. 20, a rectangular parallelepiped foam polystyrene in which longitudinal holes 53 are formed in advance is stacked or a rectangular foam foam polystyrene is piled up, and then the vertical holes 53 are formed in the foam polystyrene by heating wires or the like. After the stacking of the polystyrene foam, as shown in FIGS. 21 and 22, a pile body 54 made of a material having a relatively high compression rigidity such as concrete, mortar, plastic, sand, etc. is disposed in the vertical hole 53. And the construction method of the lightweight embankment 52 which was made to suppress a deformation | transformation by setting it as a composite structure with the polystyrene foam 51 is described.
JP-A-2005-16017 Japanese Patent Laid-Open No. 3-87417

  However, in the case of the lightweight embankment structure described in Patent Document 1, although it is possible to cope with initial settlement, it is impossible to cope with creep settlement caused by a long-term load. There was a problem that repair costs were incurred.

  Moreover, in the lightweight embankment 52 described in the said patent document 2, since a vertical load is supported by the pile body 54, the elastic deformation of a polystyrene foam and creep subsidence can be suppressed, and the advantage which can reduce maintenance repairs, such as a road surface, significantly. However, there is a problem that the material cost increases because it is necessary to spread the expanded polystyrene 51 over almost the entire volume of the embankment.

  Furthermore, since a general lightweight embankment structure is constructed by laminating block-shaped foamed polystyrene, there is a problem that resistance to shear deformation between layers and shear strength are low.

  Therefore, the main problem of the present invention is to prevent road surface deformation caused by compressive deformation due to an overload or creep settlement due to a long-term load in a lightweight embankment structure using a resin foam block such as polystyrene foam, and a resin foam block Another object is to provide a lightweight embankment structure and a resin foam block body therefor that are excellent in stability and structure as an embankment structure, and a construction method thereof.

  In order to solve the above-mentioned problem, the present invention according to claim 1 is configured by stacking resin foam block bodies in the vertical direction, and the laminated structure of the resin foam block bodies is continuously arranged in a lattice shape in plan view. In addition, a light-weight embankment structure is provided in which through-holes that are long in the longitudinal direction are formed in each cross portion, and columns are provided in the through-holes.

  In the invention of the first aspect, as seen in the conventional light weight embankment structure, the resin foam block body is laminated in the vertical direction, but the laminate structure of the resin foam block body is in a plan view. The structure is such that through holes that are continuous in a lattice shape and that are longitudinally extending in the vertical direction are formed in each cross portion, and a column body is provided in the through holes.

  Therefore, since most of the compressive load from the upper part is supported by the column and transmitted to the construction base surface, it is possible to prevent road surface deformation due to compression deformation or creep settlement of the resin foam block body. it can.

  In addition, since the laminated structure using the resin foam block body has a structure that is continuous in a lattice shape in plan view, the volume of the resin foam block body can be greatly reduced, and the material cost of the resin foam block body can be reduced. Can be achieved. Furthermore, since the laminated structure by the resin foam is continuous in a lattice shape in a plan view, it has excellent stress transmission characteristics and is an integral structure joined by the pillars. As shown, it will have sufficient shear strength and shear deformation characteristics. On the other hand, the resin foam block body functions to prevent buckling of the column body by restraining the periphery of the column body.

  As a second aspect of the present invention, the resin foam block body has a cross-shaped planar shape, and a resin foam block body in which a through-hole is formed in the longitudinal direction at the center of the cross portion and / or two planar shapes. The lightweight embankment structure according to claim 1, wherein a resin foam block body having a double cross shape in which a cross shape is continuously formed and a vertical through hole is formed at the center of each cross portion is provided.

  In order to construct a laminated structure that is continuous in a lattice shape in plan view, the present invention as defined in claim 2 described above is as a resin foam block body. Resin foam block with through-holes formed in the direction, (2) The planar shape is a double cross formed by connecting two crosses, and a vertical through-hole is formed at the center of each cross One or both of the resin foam block bodies are used.

  As the present invention according to claim 3, the resin foam block body has a double cross shape in which the planar shape is formed by connecting two cross shapes, and a vertical through hole is formed at the center of each cross portion. While using the resin foam block body, the resin foam block body is oriented in the same direction as the lower resin foam block body, and is laminated in a staggered arrangement in the height direction so as to straddle the lower resin foam block bodies The lightweight embankment structure according to claim 1, wherein the pattern and any of the patterns laminated with a difference in orientation angle of 90 degrees with respect to the resin foam block body on the lower side are provided.

  According to the third aspect of the present invention, in order to construct a laminated structure that is continuous in a lattice shape in a plan view, the resin foam block body has a double cross shape in which two cross shapes are continuously provided. In addition, a resin foam block body in which a longitudinal through hole is formed at the center of each cross portion is used, and the resin foam block body is oriented in the same direction as the lower resin foam block body. Either a pattern laminated in a staggered arrangement in the height direction so as to straddle between the foam block bodies or a pattern laminated with a 90-degree orientation angle difference with respect to the resin foam block body on the lower stage side, or a combination thereof . Therefore, it is excellent in stability and structure as a banking structure by being laminated so that resin foam blocks adjacent in the vertical direction are combined.

  As the present invention according to claim 4, the pillar body is a mortar or concrete pillar body filled in the through-hole instead of the resin foam block body as a mold, and a ready-made concrete pillar inserted and installed in the through-hole. The light-weight embankment structure according to any one of claims 1 to 3, wherein the light-weight embankment structure is a body, a ready-made steel pillar, or a ready-made concrete pillar with an outer shell steel pipe.

  The present invention according to claim 4 lists materials constituting the column body. Specifically, as the column body, a resin mortar or concrete column body filled in the through hole instead of a resin foam block body, a ready-made concrete column body inserted and installed in the through hole, a ready-made steel body It can be either a column or a ready-made concrete column with a shell steel tube. Of these columns, the most desirable is a column made of mortar or concrete filled in the through-holes instead of a resin foam block as a mold.

  As the present invention according to claim 5, the laminated structure of the resin foam block body is configured by being laminated between a lower surface side concrete floor slab and an upper surface side concrete floor slab, and the column body is the lower surface side concrete floor plate. The lightweight embankment structure in any one of Claims 1-4 which has connected the floor slab and the upper surface side concrete floor slab structurally.

  The invention according to claim 5 comprises a laminated structure made of a resin foam block between a lower surface side concrete floor slab and an upper surface side concrete floor slab, and the lower surface side concrete floor slab and the upper surface side concrete floor slab The columnar body is provided so as to be structurally connected to each other, and the load from the upper part is uniformly and effectively transmitted to the ground side.

  The lightweight embankment structure according to any one of claims 1 to 5, wherein the planar shape of the present invention according to claim 6 is a cross shape, and a through hole is formed in the longitudinal direction at the center of the cross portion. A resin foam block body for is provided.

  The present invention according to claim 7 is characterized in that the planar shape is a double cross formed by connecting two crosses, and a vertical through hole is formed at the center of each cross. The resin foam block body for the lightweight embankment structure in any one of 1-5 is provided.

  In the present invention according to claim 8, the resin foam block body in which the planar shape forms a cross shape on the construction base surface and the through hole is formed in the longitudinal direction at the center of the cross portion, and / or the planar shape has two shapes. If a resin foam block body in which a vertical cross-hole is formed at the center of each cross section is laminated under the condition that the through-hole is a longitudinal passage in the vertical direction There is provided a method for constructing a lightweight embankment, characterized in that a columnar body is provided in a through-hole that is long in the vertical direction.

  As the present invention according to claim 9, in the step of laminating the resin foam block body, when the resin foam block body is laid, the openings formed in a lattice arrangement are closed with a curing plate to form a scaffold, and for each layer 9. The light weight according to claim 8, wherein the curing plate is refilled and left after construction of the uppermost resin foam block body to form a lower surface side formwork for placing an upper surface side concrete floor slab. An embankment construction method is provided.

  In the present invention described in claim 8, when the resin foam block body is laid, the openings formed in a lattice arrangement are closed with a curing plate to form a scaffold, and the curing plate is replaced for each layer. It is possible to efficiently construct this lightweight embankment structure by leaving it after construction of the uppermost resin foam block body and using it as the lower surface side formwork for placing the upper surface side concrete floor slab. .

  As described above in detail, according to the present invention, in a lightweight embankment structure using a resin foam block such as polystyrene foam, while preventing road surface deformation caused by compressive deformation due to an overload or creep settlement due to a long-term load, the resin foam block The body material cost can be reduced. Moreover, it becomes possible to set it as the lightweight banking structure excellent in the stability and structure as a banking structure.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

  In this embodiment, as shown in FIG. 1, an example of a lightweight embankment structure 1 of an elevated road will be described in detail. FIG. 1 is a cross-sectional view of a lightweight embankment structure 1 according to the present invention. 2 is a sectional view taken along the line II-II in FIG.

  As shown in FIG. 1, the lightweight embankment structure 1 according to the present invention has resin foam block bodies 2, 2 laminated in a vertical direction between a lower surface side concrete floor slab 3 and an upper surface side concrete floor slab 6. As shown in FIG. 3, the laminated structure made of the resin foam block bodies 2, 2... Is continuous in a lattice shape in plan view and is longitudinally passed through each cross portion in the vertical direction. In this embankment structure, through-holes 9 are formed, and pillars 7, 7... Structurally connecting the lower surface side concrete floor slab 3 and the upper surface side concrete floor slab 6 are provided in the through hole 9. . Here, “structurally connected” means a structural system in which a load from the upper surface side concrete floor slab 6 is transmitted to the lower surface side concrete floor slab 3 through the pillars 7, 7. In addition to the case where the floor slab 6 and the lower surface side concrete floor slab 3 are directly connected, the case where the floor slab 6 is connected via a footing of the protective wall 5 as in the embodiment described later is included. Even in this case, the load from the column 7 is reliably transmitted to the lower surface side concrete floor slab 3 through the footing.

  Protective walls 5 and 5 corresponding to a collision load are arranged on the side surface of the laminated structure by the resin foam block bodies 2, 2... And wall materials 4 and 4 are arranged on the upper side of the protective walls 5 and 5. Yes. A road surface structure made of a roadbed and pavement is formed on the upper side of the upper concrete floor slab 6. In this embodiment, the protective wall 5 is arranged. However, when the site can be secured, the resin foam block bodies 2, 2... Are stacked stepwise on the embankment side and covered with the covering soil. It is also possible to use a slope shape.

  As shown in FIG. 3, the resin foam block body 2 has a double cross shape in which a planar shape is formed by connecting two cross shapes, and a vertical through hole 9 is formed at the center of each cross portion. As shown in FIG. 4, the resin foam block bodies 2, 2... Are oriented in the same direction as the lower resin foam block body so as to straddle between the lower resin foam block bodies. It is desirable to use either or a combination of a pattern that is stacked in a staggered arrangement in the height direction and a pattern that is stacked with an orientation angle difference of 90 degrees with respect to the lower resin foam block body 2. That is, a pattern in which the resin foam block bodies 2, 2... Are stacked in a staggered pattern in the height direction between layers adjacent in the vertical direction, or if the lower layer is oriented in the X direction, the upper layer is the longitudinal axis. By making them a pattern oriented in the Y direction, or by combining them, the resin foam blocks 2 adjacent to each other in the vertical direction are laminated so as to be combined with each other. It will be excellent.

  The material of the resin foam block body 2 is preferably a polystyrene foam molded by adding a foaming agent to a polystyrene resin generally used in the EPS construction method, but depending on the case, polypropylene, polyethylene, nylon, polyethylene terephthalate, It is also possible to use a block body in which a resin such as polybutylene terephthalate is foamed. The opening ratio in a state where the resin foam block body 2 is laid is generally 20 to 50%, preferably 35 to 45%, but is set according to construction conditions and load conditions. The approximate dimensions of the resin foam block 2 are preferably about 1 to 3 m in length, 0.5 to 1.5 m in width, and about 0.25 to 1 m in height in consideration of handling during construction. .

  On the other hand, the column body 7 is a column body made of mortar or concrete filled in the through-hole, using the resin foam block body as a mold frame, a pre-made concrete column body inserted and installed in the through-hole, a pre-made steel product Any structure can be used as long as it is capable of transmitting compressive force, such as a pillar or a concrete pillar with an outer shell steel pipe, but the above-mentioned method of inserting a pre-made pillar has the advantage of requiring a short construction period. However, it is difficult to secure the adhesion and uniformity between the upper concrete floor slab 6 and the lower concrete 3, but the resin foam block bodies 2,. As an alternative, in the case of a mortar or concrete pillar filled in the through-hole 9, the adhesion and uniformity between the upper surface side concrete floor slab 6 and the lower surface side concrete 3 are Easily coercive, is superior in structural respects and construction of which can be transmitted uniformly to the lower surface side concrete deck 3 a load from the upper surface side concrete slab 6. In addition, it is also possible to arrange a reinforcing bar or the like inside the column body 7.

  Next, the construction method of the lightweight embankment using the said resin foam block body 2,2, ... is explained in full detail based on FIGS. 5-14, following a procedure.

  First, as shown in FIG. 5, if necessary, after excavating the ground to a replacement depth (construction base surface) using an excavator such as an excavator, as shown in FIG. The lower concrete floor board 3 is placed in a state where it is embedded. And as FIG. 7 shows, the support | pillar 4a and the wall surface material 4 are set up along the both ends of the lower surface side concrete floor slab 3. As shown in FIG. The lower end of the support column 4a is connected to a tie bar embedded in the lower surface side concrete floor slab 3 so as not to move.

  Next, as shown in FIG. 8, the wall surface material 4 is used as a substitute for the formwork, and the necessary formwork is disposed, and after arranging the bars, concrete is placed to form an L-shaped protective wall. Build 5.

  Next, as shown in FIG. 9, in the space surrounded by the lower surface side concrete floor slab 3 and the wall surface material 4 or the protective wall 5, the first resin foam block bodies 2, 2. Lay on the concrete slab 3. By laying the resin foam block bodies 2, 2,..., A large number of openings 10, 10,... Are formed in a lattice arrangement, as shown in FIG. ... Are blocked by curing plates 11, 11... To prevent a worker from falling and to secure a working scaffold.

  Next, as shown in FIG. 10, the second-layer resin foam block bodies 2, 2... Are laid on the upper surface of the first-layer resin foam block bodies 2, 2. At this time, the second layer (upper side) resin foam block body 2 uses a guide tube (not shown), and the first layer resin foam block body 2 and the through-holes 9 and 9 are exactly aligned in the vertical direction. Arrange them to be continuous. Further, the arrangement pattern of the second layer (upper side) resin foam block bodies 2, 2,... Is the same as the orientation direction of the first resin foam block bodies 2, 2,. A pattern arranged in a zigzag pattern in the height direction so as to straddle between the block bodies 2 and 2, and arranged in an orthogonal direction with an orientation angle difference of 90 ° from the orientation direction of the first resin foam block bodies 2, 2. It is desirable to use any one or combination of patterns to be processed. Further, the curing plates 11, 11,... Are sequentially refilled.

  Here, in order to join the resin foam block bodies 2, 2... Between the upper and lower sides, a connector 12 as shown in FIGS. 15 (A) and (B) is used. In order to prevent movement and displacement between the resin foam block bodies, the connector 12 includes a plurality of triangular claw pieces 12b erected in a saw blade shape on the peripheral edge of the flat plate portion 12a. It is pierced and fixed so as to straddle the joint surface of the body. The connector 12 shown in FIG. 15 (A) has claw pieces 12b, 12b,..., Which are erected only on one side of the flat plate portion 12a. The connector 12 shown in FIG. 2B is formed by alternately placing claw pieces 12b, 12b,... On the both surfaces of the flat plate portion 12a. This is for connecting the upper surface of the body 2 and the lower surface of the upper resin foam block body 2.

  Next, as shown in FIG. 11, the above-described laying steps are sequentially repeated, and the resin foam block bodies 2, 2... If the resin foam block body 2 is laminated to the end, as shown in FIG. 12, the columnar body 7 is formed by filling the through holes 9, 9... With, for example, mortar or concrete. This column 7 shares and supports most of the load from the upper surface side concrete floor slab 6 and transmits it to the lower surface side concrete floor slab 3, and reduces the load acting on the resin foam block body 2. This prevents compression deformation and prevents creep settlement due to a long-term load. Further, it exerts a shear resistance against the horizontal load acting on the lightweight embankment structure 1 to prevent the resin foam block bodies 2, 2... From shifting in the horizontal direction and improve the overall rigidity. Furthermore, since the load applied to the resin foam block bodies 2, 2,... Is reduced, sufficient strength can be secured without using expensive high-strength polystyrene foam, and cost can be reduced.

  Thereafter, as shown in FIG. 13, the concrete of the upper surface side concrete floor slab 6 is placed. At this time, the curing plates 11, 11... Are left in the uppermost openings 10, 10... To form the lower surface side formwork for placing the upper surface side concrete floor slab 6.

  Finally, as shown in FIG. 14, a road surface structure composed of a roadbed and pavement is constructed on the upper surface side of the lightweight embankment structure 1 to complete the construction.

  Next, resin foam block specimens according to the inventive examples and comparative examples 1 and 2 were prepared, and experiments were conducted on shear strength characteristics. The outline of the experiment will be described below.

The specimens used in the inventive examples and comparative examples 1 and 2 are as follows.
(Example of the present invention)
As shown in FIG. 16, the specimen according to the present invention is formed by laminating a double cross-shaped resin foam block body 2 (see FIG. 3) in three layers in two rows on a steel base 14, and through holes 9 was provided with a concrete column 7 and a precast RC slab 15 was placed on the upper surface. In addition, the ratio of the solid part of the resin foam block bodies 2, 2, ... is 61%.

(Comparative Example 1)
As shown in FIG. 17, the specimen according to Comparative Example 1 includes three stages of resin foam block bodies 51 (see FIG. 22) in which two through holes 9 are formed on a steel base 14 in two layers. Laminated, a concrete column 7 was provided in the through hole 9, and a precast RC floor slab 15 was placed on the upper surface. In addition, the ratio of the solid part of the resin foam block bodies 51, 51 ... is 97%.

(Comparative Example 2)
In contrast to Comparative Example 1, the specimen according to Comparative Example 2 is obtained by eliminating the concrete column 7 as a solid resin foam block having no through holes 9. Other structures are the same as those in Comparative Example 1.

(Experimental methods and results)
About each specimen concerning the example of the present invention and comparative examples 1 and 2, as shown in the schematic diagram of the experimental apparatus in FIG. 18, the hydraulic jack 19 is passed through the jig 20 from the upper surface of the precast RC floor slab 15. With a uniform load applied in the vertical direction, the horizontal load was gradually increased from the side surface of the H steel material 16 by the hydraulic jack 21, and the relationship between the horizontal load and the deformation angle of the resin foam block was examined. The result is shown in FIG. At the same time, a mold gauge 22 was attached to the side surface of the concrete column 7 to measure the stress acting on the concrete column 7.

  The embankment structure (invention example) made up of the double cross-shaped resin foam block body 2 and the concrete column 7 has higher shear rigidity than the conventional structure made only of the resin foam block body (Comparative Example 2). It was verified that the yield strength was improved. In addition, the degree of stress generated by the concrete column 7 provided on the double cross-shaped resin foam block 2 was small, and there was no damage such as cracks. Thereby, it has confirmed that the usage-amount of the resin foam block body 2 can be reduced significantly by arranging the concrete pillar 7. FIG.

[Other examples]
(1) In the above embodiment, the resin foam block body 2 has a double cross shape in which the planar shape is formed by connecting two cross shapes, and a vertical through hole is formed at the center of each cross portion. Although the block body is used, it is also possible to use a block body in which a shape obtained by dividing the block body into two portions, that is, a planar shape forms a cross shape, and a vertical through hole is formed at the center of the cross portion. In addition, this cross-shaped block body can also be used as an end adjustment block when arranged in a staggered manner on the basis of the double cross-shaped block body.

It is a cross-sectional view of the lightweight embankment structure 1 which concerns on this invention. It is II-II sectional drawing of FIG. 3 is a perspective view of a resin foam block body 2. FIG. It is a perspective view which shows the assembly state of the resin foam block body 2. FIG. It is a cross-sectional view which shows the construction procedure (the 1) of the lightweight banking structure 1 which concerns on this invention. It is a cross-sectional view which shows the construction procedure (the 2) of the lightweight banking structure 1 which concerns on this invention. It is a cross-sectional view which shows the construction procedure (the 3) of the lightweight banking structure 1 which concerns on this invention. It is a cross-sectional view which shows the construction procedure (the 4) of the lightweight banking structure 1 which concerns on this invention. It is a cross-sectional view which shows the construction procedure (the 5) of the lightweight banking structure 1 which concerns on this invention. It is a cross-sectional view which shows the construction procedure (the 6) of the lightweight banking structure 1 which concerns on this invention. It is a cross-sectional view which shows the construction procedure (the 7) of the lightweight banking structure 1 which concerns on this invention. It is a cross-sectional view which shows the construction procedure (the 8) of the lightweight banking structure 1 which concerns on this invention. It is a cross-sectional view which shows the construction procedure (the 9) of the lightweight banking structure 1 which concerns on this invention. It is a cross-sectional view which shows the construction procedure (the 10) of the lightweight banking structure 1 which concerns on this invention. It is a perspective view which shows the example of a form of the connection tool. (A) which shows the test body using the double cross-shaped resin foam block body 2 which concerns on this invention is a cross-sectional view, (B) is the BB sectional drawing. (A) which shows the test body using the resin foam block body 51 which concerns on the comparative example 1 is a cross-sectional view, (B) is the BB sectional drawing. It is the schematic of an experimental apparatus. It is a graph which shows an experimental result. It is a perspective view which shows the conventional resin foam block body 51. FIG. It is a cross-sectional view showing a conventional lightweight embankment 51. It is the XXII-XXII sectional view.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Lightweight embankment structure, 2 ... Resin foam block body, 3 ... Lower surface side concrete floor slab, 4 ... Wall surface material, 5 ... Protective wall, 6 ... Upper surface side concrete floor slab, 7 ... Concrete pillar, 9 ... Through-hole, 10 ... opening, 11 ... curing plate, 12 ... connector

Claims (9)

  The resin foam block body is constructed by laminating the resin foam block body in the vertical direction, and the laminated structure of the resin foam block body is continuous in a lattice shape in a plan view, and each cross portion has a through-hole that is long in the longitudinal direction. A lightweight embankment structure characterized by being formed and provided with a pillar in the through hole.   The resin foam block body includes a resin foam block body in which a planar shape forms a cruciform shape and a through hole is formed in the longitudinal direction in the center of the cross portion and / or two tens of cruciform shapes in which the planar shape is continuously provided. The lightweight embankment structure according to claim 1, wherein a resin foam block body having a letter shape and having a vertical through hole formed at the center of each cross portion is used.   The resin foam block body uses a resin foam block body in which a planar shape forms a double cross shape in which two cross shapes are continuously provided, and a vertical through hole is formed at the center of each cross portion, The resin foam block body is oriented in the same direction as the lower resin foam block body, and the pattern is laminated in a staggered arrangement in the height direction so as to straddle between the lower resin foam block bodies and the lower resin foam block body The light-weight embankment structure according to claim 1, wherein any one or a combination of patterns stacked with an orientation angle difference of 90 degrees with respect to the surface.   The column body is a column made of mortar or concrete filled in the through hole instead of the resin foam block body as a mold, a pre-made concrete column body inserted into the through hole, a pre-made steel column body, or The light-weight embankment structure according to any one of claims 1 to 3, wherein the light-weight embankment structure is any one of ready-made concrete columns with a shell steel pipe.   The laminated structure of the resin foam block body is configured by laminating between a lower surface side concrete floor slab and an upper surface side concrete floor slab, and the column body includes the lower surface side concrete floor slab and the upper surface side concrete floor slab. The lightweight embankment structure in any one of Claims 1-4 which has connected structurally.   The resin foam block body for a lightweight embankment structure according to any one of claims 1 to 5, wherein the planar shape has a cross shape, and a through hole is formed in the longitudinal direction in the center of the cross portion.   The light weight according to any one of claims 1 to 5, wherein the planar shape forms a double cross shape in which two cross shapes are continuously provided, and a vertical through hole is formed at the center of each cross portion. Resin foam block for embankment structure.   Resin foam block body in which the plane shape forms a cross shape on the construction base surface, and a through hole is formed in the longitudinal direction at the center of the cross portion, and / or the double cross shape in which the plane shape is formed by connecting two cross shapes. And a resin foam block body in which a longitudinal through hole is formed at the center of each cross portion is laminated under the condition that the through hole is longitudinally passed through in the longitudinal direction, A method for constructing a lightweight embankment characterized in that a pillar is provided in a hole. In the step of laminating the resin foam block body, when the resin foam block body is laid, the openings formed by the grid arrangement are closed with a curing plate to form a scaffold, and the curing plate is replaced for each layer, The method for constructing a lightweight embankment according to claim 8, wherein the method is used as a lower surface side frame for placing an upper surface side concrete floor slab, which is left after construction of the uppermost resin foam block body.

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