JP2006138157A - Lightweight embankment and foamed resin block for lightweight embankment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a lightweight embankment having an outer wall that is easier to construct and has excellent durability and design, and a foamed resin block for lightweight embankment used for the lightweight embankment.
A lightweight embankment is constructed by stacking foamed resin blocks (1). A composite plate or metal plate formed by laminating a metal sheet on the surface is attached as an exterior material (3) on the side face of the foamed resin block (1a) stacked on the outer periphery, and the outer periphery of the lightweight embankment The outer wall is configured by the arrangement of the exterior material (3). Further, the exterior material (3) is attached to the foamed resin block (1a) via the exterior exterior material (3), and a gap for drainage is provided between the side surface of the foamed resin block (1a) and the exterior material (3). (4) is formed.
[Selection] Figure 1

Description

  TECHNICAL FIELD The present invention relates to a lightweight embankment and a foamed resin block for lightweight embankment, and more specifically, a lightweight embankment constructed by an EPS construction method in which foamed resin blocks are stacked, and an outer wall that is more easily constructed and has excellent durability. And a foamed resin block for light weight embankment used for the light weight embankment.

  EPS (Expanded Polystyrene Construction Method) is a lightweight foam polystyrene for civil engineering such as embankment of soft ground, road embankment, embankment of landslide, wide embankment, steep slope embankment, and various structures. It is a construction method that piles up the blocks as embankment material and backfill material. Lightweight embankment constructed by the EPS method can greatly reduce the embankment load and prevent settlement and landslides. Furthermore, since the compressive force in the uniaxial direction is large and a clear shear region does not occur, it is possible to demonstrate excellent load resistance, and it is excellent in self-supporting property, and the lateral deformation is extremely small even when an overload is applied. Therefore, the back earth pressure can be greatly reduced. In addition, since it can be stacked manually, it can be easily and quickly constructed even in places where it is difficult to use large machines.

In the above-described lightweight embankment, an outer wall is laid as a protective wall or a decorative wall on the outer peripheral portion. However, in order to improve workability, embankment using a foamed resin block to which an exterior material has been attached in advance has been proposed. Such embankment uses, as a foamed resin block, a foamed resin block with one side coated with mortar, or a foamed resin block to which a tile or an inorganic extruded cement board is bonded. The outer wall is formed on the outer periphery by arranging in the above. Lightweight embankments such as those described above do not require heavy machinery work such as lifting concrete boards or pillars with cranes, etc., compared to conventional embankments that support concrete boards with pillars and constitute the outer wall. The outer wall can be easily constructed just by stacking.
Japanese Patent Application Laid-Open No. 2004-137782

  By the way, the embankment as described above must prepare in advance a foamed resin block to which an exterior material is attached, but mortar coating on one side of the foamed resin block, adhesion of tiles and inorganic extruded cement boards, It is a wet process and requires a lot of work to produce. Moreover, mortar, tiles, inorganic extruded cement boards, etc. have extremely low elastic modulus and are brittle, so when integrated with a foamed resin block, they are prone to cracking due to distortion due to overload, wheel load, etc. There is a problem of lack of sex. Further, the foamed resin block as described above increases in thickness when the strength of the exterior material is increased, and the weight of the entire block increases, so that it is difficult to handle and the workability is deteriorated. Furthermore, there is a problem that mortar and inorganic extruded cement boards have poor design properties.

  The present invention has been made in view of the above circumstances, and the purpose thereof is a lightweight embankment having an outer wall that is easier to construct and has excellent durability and design, and a light weight used for the lightweight embankment. The object is to provide a foamed resin block for embankment.

  In order to solve the above-mentioned problems, in the present invention, in a lightweight embankment in which foamed resin blocks are stacked, a composite plate with a metal sheet on the surface or a foamed resin block with a metal plate attached as an exterior material is stacked on the outer peripheral portion to achieve durability. The outer wall is excellent in the properties and design.

  That is, the gist of the present invention is a light-weight embankment constructed by stacking foam resin blocks, and a composite plate formed by laminating a metal sheet on the side surface facing the outside of the foam resin blocks stacked on the outer periphery. Alternatively, a metal plate is attached as an exterior material, and the outer surface of the lightweight embankment has a metal outer wall with an outer surface formed by the arrangement of the exterior material.

  Another gist of the present invention is a foamed resin block used for an outer peripheral portion in the above-mentioned lightweight embankment, and a composite plate or a metal plate formed by laminating a metal sheet on the side surface of the block is a packaging material. It exists in the foaming resin block for lightweight embankments characterized by being comprised so that attachment is possible.

  According to the present invention, the outer wall of the soft structure is configured by the arrangement of the exterior material made of a specific material having a relatively large elastic modulus, and even when the foamed resin block sinks due to an overload or a wheel load, each exterior Since the material flexibly follows, it is difficult to cause damage such as cracks in the outer wall, and is excellent in durability. In addition, the exterior material is thinner and has sufficient strength, and the exterior material is thinner and the weight of the entire foam resin block is reduced compared to conventional foam resin blocks with mortar and inorganic extruded cement boards. Therefore, workability can be improved. Furthermore, since the exterior material made of a specific material can be subjected to various surface treatments such as granite tone in advance, the design of the outer wall can be easily improved.

  Embodiments of a lightweight embankment and a foamed resin block for lightweight embankment according to the present invention will be described based on the drawings. FIG. 1 is a longitudinal sectional view showing the internal structure of an example of a lightweight embankment according to the present invention. FIG. 2 is a perspective view partially showing a foamed resin block stacked on the outer peripheral portion and a mounting structure of an exterior material to the foamed resin block. FIG. 3 is a longitudinal sectional view showing the structure of the attachment member provided on the back surface of the exterior material and the attachment structure of the exterior material to the foamed resin block.

  The present invention can be applied to various embankments such as embankment of soft ground, road embankment, embankment of landslide, widening embankment, steep slope embankment, and the like (hereinafter abbreviated as “embankment”). 1 is constructed by a so-called EPS method in which foamed resin blocks (hereinafter abbreviated as “blocks”) (1) are piled up as an embankment material. In FIG. 1, the embankment constructed on an inclined land is shown as an example, but the embankment of the present invention can be constructed as a road embankment or the like even on a flat land.

  In the above embankment, the block (1) is a foam molded body formed in a rectangular parallelepiped or a cube (see FIG. 2), and usually has a thickness (height) of about 30 to 200 cm, a length (depth) and a width. The (front side width) is designed to be about 40 to 300 cm. As a constituent material of the block (1), basically, a thermosetting resin such as polyurethane resin, phenol resin, urea resin, melamine resin, polystyrene foam resin, polypropylene foam resin, polyethylene, etc. And thermoplastic foamable resins such as a series foamable resin. Among these, a polystyrene-based foaming resin having good moldability and workability is particularly preferable. Although not shown, in order to reduce the weight and reduce the material, a hole may be formed in the block (1) as long as necessary strength can be maintained.

  In the present invention, in order to improve workability, as shown in FIG. 2, a metal sheet is laminated on the surface as an exterior material (3) on the side facing the outside of the block (1a) stacked on the outer periphery. A composite plate or a metal plate is attached. That is, the exterior material (3) whose surface is made of metal is attached to the side surface of the block (1a). As shown in FIG. 1, an outer wall having a metal outer surface is formed on the outer periphery of the embankment by the arrangement of the exterior material (3).

  Although there is no restriction | limiting in particular as a metal plate which comprises an exterior material (3), Metal plates, such as aluminum, stainless steel, titanium, and iron, are mentioned. Among these, an aluminum plate that is lightweight and easy to handle during construction is preferable. The plate thickness of the metal plate is usually about 0.1 to 3 mm, although it varies depending on the material. The metal plate may be a molded plate having a three-dimensional shape such as a corrugated plate. In the case of a molded plate, the maximum thickness of the outer shape is about 15 mm. Furthermore, the surface of the metal plate may be coated with a resin or the like for waterproofing, rust prevention, scratch prevention, and the like.

  In the present invention, a metal sheet is laminated on the surface of the synthetic resin sheet as the exterior material (3) in order to reduce the weight of the block (1a) to improve workability and to exert sufficient strength on the outer wall. A composite plate is preferable. In particular, from the viewpoint of load bearing strength and fixing strength of the mounting member (2) to be described later to the composite plate, a composite plate formed by laminating metal sheets on both surfaces of a synthetic resin sheet is preferable.

  Examples of the resin of the synthetic resin sheet used as the core material in the composite plate include thermoplastic resins such as polyolefins such as polyethylene and polypropylene, polyvinyl chloride, polyamide, polycarbonate, polystyrene, polyhydroxyl ether, and vinyl acetate. Of course, a thermosetting resin may be used. Among these resins, those containing aluminum hydroxide or magnesium hydroxide as the endothermic inorganic filler are particularly preferable. The synthetic resin sheet is usually formed to a thickness of about 1 to 6 mm. On the other hand, as a metal of said metal sheet, metals, such as aluminum, stainless steel, iron, copper, titanium, tin, nickel, or various alloys are mentioned. The thickness of the metal sheet is about 0.1 to 1 mm, usually 0.3 to 0.5 mm.

  A metal sheet is laminated | stacked in the state closely_contact | adhered to the synthetic resin sheet using the adhesive agent. Adhesives include ethylene-acrylic acid copolymers, ethylene-vinyl acetate copolymers, ethylene-glycidyl acrylate copolymers, ethylene-maleic anhydride copolymers, unsaturated carboxylic acids such as polyolefins (polyethylene, etc.) An anhydride graft-modified product may be used. The composite plate as described above is manufactured by superposing metal sheets on both surfaces of a melt-extruded synthetic resin sheet and passing it between rotating rolls. Note that, similarly to the above metal plate, the surface of the metal sheet may be coated with a resin or the like for waterproofing, rust prevention, scratch prevention, and the like.

Among the above composite plates, a composite plate in which an endothermic inorganic filler is blended with a synthetic resin sheet has a heat generation amount of 20 MJ / m ² or less in a heat generation test according to ISO 5660, and is a non-combustible material. Therefore, it is a preferable material as the exterior material (3) constituting the outer wall. In particular, from the viewpoint of fire resistance and heat resistance, a laminate of synthetic resin sheets mainly composed of polyethylene or polypropylene resin is preferable.

Moreover, as said composite board, in order to prevent the deformation | transformation and damage by a load, what is provided with the elasticity close | similar to a block (1) is preferable. Specifically, the flexural modulus of the composite plate is usually 5 to 70 GPa, preferably 15 to 50 GPa. Furthermore, the above composite plate has a weight of 1.5 to 1.5% by adjusting the thickness of the synthetic resin sheet and the metal sheet in order to ensure the necessary strength and reduce the weight of the entire block (1a). 10.0 kg / ^{m 2,} is preferably set to 3.0~6.0kg / ^{m 2.} The weight of the composite board including a mounting member (2) to be described later 3~25kg / ^{m 2,} preferably 5~15kg / ^{m 2.}

  Furthermore, in the composite plate as described above, the surface can be finished to a granite tone, etc. by applying irregularities and various coatings to the surface metal sheet at the time of production, and the design is easily improved. I can do it. That is, the exterior material (3) is surface-finished in, for example, a granite tone in order to enhance its design without impairing the landscape. In addition, as a composite plate formed by laminating a metal sheet (aluminum sheet) on a polyethylene sheet, for example, a product “Alpolic” manufactured by Mitsubishi Chemical Corporation can be exemplified.

  As shown in FIG. 2, the exterior material (3) is attached to the side surface of the block (1a), so that the planar shape is formed into a square shape. However, the height and width of the exterior material (3) The size is designed to be slightly smaller than the height and width of the side surface. Specifically, the height and width of the exterior material (3) are set to dimensions that are smaller by about 0.5 to 20 mm than the side dimension of the block (1a). The reason for setting the outer dimensions of the exterior material (3) as described above is that, as will be described later, when the foamed resin blocks are stacked, joints are formed between the adjacent exterior materials (3), and water-stopping treatment is performed. It is for giving. Although not shown, the exterior material (3) to which the lowermost block (1a) is attached has a length in the height direction in order to provide a gap for drainage between the lower end edge and a foundation (80) described later. It may be formed somewhat shorter, or a drainage hole may be opened at the lower end.

  The exterior material (3) can be attached to the block (1a) with various fitting structures, adhesives, or screws having a structure in which the diameter of the tip end is increased, but in the present invention, the workability is further improved. Therefore, as shown in FIGS. 1 and 3, the exterior material (3) is attached to the side surface of the block (1 a) via an attachment member (2) projecting from the back surface thereof. Moreover, in order to enhance the drainage performance inside the embankment, a gap (4) for water distribution at regular intervals is formed between the side surface of the block (1a) and the exterior material (3). When the exterior material (3) is attached to the side surface of the block (1a) with the above structure, the workability can be dramatically improved and the drainage performance can be enhanced. In addition, an excessive load on the exterior material (3) due to deformation such as the sinking of the block (1a) can be avoided, and deformation of the exterior material (3) can be prevented.

  Specifically, the exterior material (3) is attached to the block (1a) by an attachment member (2) as shown in FIG. That is, the attachment member (2) includes a mold member (21) fixed along the upper edge portion and the lower edge portion of the back surface of the exterior material (3), and the mold member (21) along the longitudinal direction thereof. The upper and lower locking pieces (22) are formed so as to approach each other as they are separated from the back surface of the exterior material (3).

  The attachment member (2) may be made of resin, but is generally made of metal. In order to prevent electric corrosion, the mold material (21) is usually extruded by using the same metal material as the surface of the exterior material (3), for example, aluminum. The plate thickness of the mold material (21) is usually about 1 to 5 mm in the case of aluminum. As long as the mold material (21) can increase the rigidity of the exterior material (3) and form the gap (4) with the block (1a), the cross-sectional shape orthogonal to the longitudinal direction can be designed in various shapes. For example, the cross-sectional shape is formed in a substantially M shape as shown in the figure.

  That is, the mold member (21) is formed along the longitudinal direction of the mold member and includes a fastening portion (21c) including a joint surface fixed to the exterior member (3), and a fastening portion ( 21c) and a pair of legs raised vertically from both end edges. And the contact piece applied to the side surface of a block (1a) is provided in the front-end | tip of one leg part along the longitudinal direction of a mold material. Such a contact piece is extended toward the outside of the mold member (21) in a direction perpendicular to the leg portion. In other words, the mold material (21) is configured to form the gap (4) between the exterior material (3) and the block (1a) by the leg portion having the contact piece. And in order to improve the drainage function by a clearance gap (4), a plurality of drainage holes (illustration omitted) are provided in the leg part of a mold material (21) at an appropriate interval along the longitudinal direction. In addition, the magnitude | size (space | interval of an exterior material (3) and a block (1a)) of a clearance gap (4) is about 0.2-10 cm normally, Preferably it is 0.5-5 cm.

  Moreover, although a mold material (21) can also be attached to the back surface of an exterior material (3) by an adhesive or welding, it is attached using a rivet (5) from the viewpoint of workability. In the mold material (21), the fastening portion (21c) is immersed in a groove shape in the opposite direction to the exterior material (3) along the longitudinal direction of the joint surface with respect to the exterior material (3) and penetrates the exterior material (3). The rivet (5) driven in 3) is provided with a rivet mounting portion that prevents the slack of the rivet (5) by an elastic force. Such a rivet mounting portion is formed as a bridge-shaped bent portion that bulges away from the exterior material (3), and a rivet insertion hole is provided at the bottom along the longitudinal direction of the rivet mounting portion. . When the rivet (5) is driven into the rivet mounting portion, the bottom portion of the groove structure is elastically interposed between the exterior material (3) and the rivet head, and is added to the rivet (5) after fastening. Has the function of interfering with external force.

  In order to further increase the fastening strength between the exterior material (3) and the mold material (21) and to improve the water stoppage between the exterior material (3) and the fastening portion (21c) of the mold material (21), An adhesive layer made of a pressure-sensitive adhesive or a thermoplastic resin-based or elastomer-based adhesive may be interposed on the bonding surface of (21c). Moreover, the hollow part of the cross-sectional arc shape provided in the base part of one leg part of a mold material (21) is a reinforcement part for improving the rigidity of the said mold material.

  When the exterior material (3) is a composite plate as described above, the rivet (5) for fixing the mold material (21) to the exterior material (3) is a so-called blind rivet of a tip embedded type from the viewpoint of design. Is used. In such a rivet (5), a mandrel insertion hole is formed by inserting a mandrel (extraction rod) through a mandrel insertion hole formed from the rivet head to the rivet shaft, and pulling out the mandrel from the rivet head side. The tip of the rivet shaft portion is expanded by a mandrel head having a diameter larger than the inner diameter of the rivet shaft.

  That is, in the rivet (5), a plurality of cuts are provided along the axis on the inner surface of the mandrel insertion hole on the tip side of the rivet shaft, and the rivet shaft is operated by a relative pulling operation between the rivet shaft and the mandrel. The tip of the part is expanded and divided into a plurality of claws, and an anchoring effect is exerted on the synthetic resin sheet which is the core material of the composite board. The mandrel is cut at the stage where the widened portion is formed at the tip of the rivet shaft, and the large-diameter mandrel head at the tip remains inside the widened portion. In addition, as for the mandrel insertion type blind rivet having the above-mentioned structure, for example, various types are known as trade name “Acro Rivet” manufactured by Mitsubishi Chemical Corporation. This can be done using a tool or the like.

  The locking piece (22) is fixed in advance along the length direction to the contact piece of one leg of the mold member (21). The locking piece (22) has a substantially rectangular shape in cross section perpendicular to the longitudinal direction, and one side of the locking piece (22) is joined to the above-mentioned leg portion, whereby the mold material (21) is attached to the exterior material (3). In the state of being attached to, the other one side portion is configured to protrude to the center side of the exterior material (3). And by attaching the mold material (21) symmetrically to the upper and lower edges of the exterior material (3), the upper and lower locking pieces (22) approach each other as they move away from the back surface of the exterior material (3). Overhang.

  On the other hand, as shown in FIG. 2, the upper edge portion and the lower edge portion of the side surface facing the outside of the block (1a) arranged on the outer peripheral portion are cut in a direction approaching each other toward the inside of the block. A single cut (12) is provided, respectively. The depth of the cut (12) is substantially the same as the width of the locking piece (22) of the mounting member (2). The exterior material (3) is slid from the side of the block (1a) by inserting the locking piece (22) of the mounting member (2) into the notch (12) of the block (1a). Is attached to the side surface of the block (1a). In addition, attachment of the exterior material (3) with respect to a block (1a) may be performed before carrying in a block (1a) to the construction site which constructs embankment, and may be performed at a construction site.

  As described above, in the present invention, the outer wall as shown in FIG. 1 is formed on the outer periphery of the embankment by attaching the exterior material to the side surface of the block (1a) stacked on the outer peripheral portion. As shown, when the blocks (1a) are stacked, the joints described above are formed between the adjacent exterior materials (3) on the top, bottom, left, and right of the blocks (1a). As shown in FIG. 3, the depth portion of the joint is constituted by the outer leg portion of the mold member (21) of the mounting member (2) fixed to each adjacent exterior member (3). Therefore, the joint material (6) is inserted into the joint between the exterior materials (3) using the gaps between the legs of the adjacent mold members (21).

  The joint material (6) only needs to have a function capable of suppressing the ingress of water, and can be designed into an appropriate shape using various synthetic resins and metals. However, the block (1a For example, rubber is used, and the cross-sectional shape orthogonal to the longitudinal direction is formed in an annular shape so that it can follow the displacement of the exterior material (3) accompanying the subsidence. The joint material (6) illustrated in FIG. 3 is a pipe-shaped rubber joint material. Such joint material (6) may be inserted into the joint at the construction site of embankment, or may be attached in advance to the mold material (21) side of the attachment member (2) of the exterior material (3). Further, the joint material (6) may be attached using a receiving metal fitting depending on the material and shape thereof.

  Further, in the embankment of the present invention, as shown in FIG. 2, when the blocks (1) are stacked, the upper and lower, front, rear, left and right blocks (1) are connected by appropriate means. As a means for connecting the blocks (1), adhesion using an adhesive, an adhesive sheet, an adhesive tape, etc., adhesion using an adhesive, an adhesive sheet, an adhesive tape, etc., or formation on the outer peripheral surface of the block (1) Although the fitting of the uneven | corrugated | grooved part etc. which are mentioned is mentioned, from a viewpoint of workability, the mechanical connection by a connection metal fitting (7) as shown in figure is preferable.

  Although not shown in detail, the connection hardware (7) includes, for example, a first connection hardware formed by projecting at least two teeth on one surface side of the plate-like body, and a tooth on both sides of the plate-like body. Two types of hardware are used as the second connection hardware formed by projecting. The two types of connection hardware (7) are produced by bending a metal plate, and by using these, the horizontal and vertical blocks (1) can be connected.

  That is, the first connection hardware is formed by projecting one or a plurality of teeth from two parallel sides of the plate-like body to one surface side of the plate-like body and arranged in the horizontal direction (1 ) Has a function of connecting adjacent blocks (1) by piercing them so as to straddle these blocks. In addition, the second connecting hardware has one or more teeth protruding from one side of the plate-like body parallel to one side of the plate-like body and 1 on the other side of the plate-like body. The upper and lower blocks (1) are formed by projecting one or a plurality of teeth, piercing the connection hardware on the upper surface of the already laid block (1), and placing the upper block (1) thereon. It has a function of connecting each other. Furthermore, the upper and lower blocks (1) may be coupled by a pile-shaped third connecting hardware formed by sharpening one end of the rod-shaped body.

  The embankment of the present invention is constructed as follows. First, as shown in FIG. 1, the foundation (80) is driven and cured with a predetermined width along the width direction of the slope (9), and then the blocks (1) are sequentially stacked on the foundation (80). . When the blocks (1) having the same shape and size are used, the blocks (1) in the horizontal direction are stacked so that the seams in the upper and lower blocks (1) are shifted from each other. In addition, when using blocks (1) having different sizes, the so-called “British” or “French” is used. When stacking the blocks (1) as described above, as shown in FIG. 2, the above-described two types of connection hardware (7) are used to easily connect the front and rear, right and left blocks and the upper and lower blocks (1). I can do it.

  Further, when the blocks (1) are stacked, for example, a composite plate is attached as an exterior material (3) to the side face directed to the outside of the blocks (1a) stacked on the outer peripheral portion. As described above, the exterior material (3) may be attached before the blocks (1a) are stacked, or may be attached while the blocks (1a) are stacked. The exterior material (3) is slid from the side to the side surface of the block (1a), and the locking piece (22) of the mounting member (2) is inserted into the notch (12) formed on the side surface of the block (1a). Therefore, it can be attached very easily.

  Further, although not shown in the drawings, when the blocks (1) are sequentially stacked as described above, if the number of stages of the blocks (1) is large, an intermediate floor plate made of concrete or the like is arranged to increase the number of blocks (1). It is desirable to correct the unevenness and level difference that occur. Usually, an intermediate floor board is provided every 2-3 m with respect to the pile height of a block (1). By installing such an intermediate floor plate, it is possible to obtain an effect of evenly dispersing the mounted load and the wheel load.

  In addition, when the blocks (1) are stacked, as shown in FIG. 1, when a gap is created behind the block (1) on the natural ground side, that is, the block (1) and the slope (9) disposed at the farthest side. If there is a gap between the blocks, the back of the block (1) is packed with a crushed stone (81) for reinforcement so that the upper block (1) can be stably supported. By padding with crushed stones (81), unevenness and steps in the upper block (1) can be further reduced.

  As described above, a bank can be easily constructed by stacking the blocks (1), and at the same time, an outer wall can be formed on the outer periphery of the bank by the arrangement of the exterior material (3), that is, the upper, lower, left and right arrays. . In addition, as shown in FIG. 3, joints are formed between the adjacent exterior materials (3) by stacking the blocks (1), but at the time of stacking construction of the blocks (1) or after construction, By inserting the joint material (6), a water stop treatment is performed on the outer wall.

  Further, for example, a road as shown in FIG. 1 is laid on the upper part of the constructed embankment. When laying roads, etc., in order to protect the block (1), hard vinyl chloride, nylon, high density polyethylene, fluororesin, phenol resin, melamine resin, furan resin, diallyl phthalate, etc., or a laminate of resins selected from these The upper surface of the uppermost block (1) may be covered with a protective sheet made of a body and having excellent solvent resistance. The road is constructed by sequentially constructing a concrete roadbed (82), roadbed (83), and pavement (84) on the protective sheet.

  Depending on the shape of the embankment and the construction location, anchor work and stake pile work are applied as necessary to ensure a predetermined safety factor against sliding and falling during an earthquake. FIG. 1 shows an example in which an anchor work is performed. In the above embankment, for example, the anchor (85) is driven into the slope (9) from the end of the concrete roadbed (82) on the natural ground side, It is made so that the embankment doesn't lean to the valley side.

  As described above, in the embankment of the present invention, the outer wall of the soft structure is configured by the arrangement of the exterior material (3) made of a specific material having a relatively large elastic modulus, and the block (1 ) And (1a) also sink, each exterior material (3) flexibly follows, and therefore, damage such as cracks in the outer wall hardly occurs, and the durability is excellent. In addition, the exterior material (3) has a thinner thickness and sufficient strength, and the exterior material (3) is made thinner compared to the block provided with a conventional mortar or an inorganic extruded cement board. Since the overall weight can be reduced, handling is easy and workability can be further enhanced. Furthermore, since the exterior material (3) made of a specific material can be subjected to various surface treatments such as granite tone in advance, the design of the outer wall can be easily enhanced.

  In particular, in the embankment of the present invention, the exterior material (3) is attached to the side surface of the block (1a) via the attachment member (2), and a gap (between the side surface of the block (1a) and the exterior material (3) ( 4) is formed, rainwater (groundwater) entering the embankment can be smoothly discharged through the gap (4), and is discharged from the lower end of the outer wall through the gap (4). Prevents contamination by drainage on the surface. Further, when a specific mounting member (2) composed of a mold material (21) and a strip-shaped locking piece (22) as shown in FIG. 3 is provided on the exterior material (3), the block (1a) Since the exterior material (3) can be attached to the block (1a) simply by inserting the locking piece (22) of the attachment member (2) into the notch (12) on the side surface, the workability can be further improved. I can do it.

  Moreover, the block (1a) for lightweight embankment used for an outer peripheral part in said embankment is a composite board or a metal plate which laminated | stacked a metal sheet on the surface with respect to the side surface orient | assigned to the exterior, (3) As described above, the exterior material (3) can be attached very easily as described above, and the outer wall of the embankment can be constructed simply by stacking, so that the workability when constructing the embankment is further improved. It can be further improved.

  In the present invention, struts made of various types of steel, extruded molds, pipes and the like may be erected in a state of penetrating the outer peripheral block (1a). Furthermore, in place foaming resin such as hard polyurethane can be used in combination with the embankment material instead of part of the block (1) inside the embankment. When foamed resin is used inside the embankment, for example, the foamed resin is filled to a proper height in the gap between the outer peripheral block (1a) and the slope (9), and the top surface of the foamed resin is earth and sand or crushed stone. After forming a flat reference surface, the blocks (1) are stacked to construct a bank. At that time, it is preferable to provide a sheet-like cushioning material that cushions the expansion force of the foamed resin inside the block (1a) on the outer peripheral portion to prevent damage such as cracks in the block (1a).

It is a longitudinal cross-sectional view which shows the internal structure of an example of the lightweight embankment which concerns on this invention. It is a perspective view which expands partially and shows the foaming resin block piled up on an outer peripheral part, and the attachment structure of the exterior material to the foaming resin block. It is a longitudinal cross-sectional view which shows the structure of the attachment member provided in the back surface of the exterior material, and the attachment structure of the exterior material with respect to a foamed resin block.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1: Foamed resin block 1a: Foamed resin block of outer peripheral part 12: Notch 2: Mounting member 21: Mold material 21c: Fastening part 22: Locking piece 3: Exterior material 4: Gap 5: Rivet 6: Joint material 7: Connection Hardware 80: Foundation 81: Crushed stone 82: Concrete roadbed 83: Roadbed 84: Pavement 85: Anchor 9: Slope

Claims (7)

  In a lightweight embankment constructed by stacking foam resin blocks, a composite plate or metal plate made by laminating metal sheets on the surface is attached to the side facing the outside of the foam resin block stacked on the outer periphery as an exterior material A lightweight embankment characterized in that a metal outer wall is formed on the outer periphery of the lightweight embankment by the arrangement of the exterior materials.   The lightweight embankment according to claim 1, wherein the exterior material is attached to a side surface of the foamed resin block via an attachment member provided on the back surface thereof.   The mounting member is composed of molds fixed along the upper edge and lower edge of the back surface of the exterior material, and strip-shaped locking pieces respectively provided in the mold material along the longitudinal direction thereof. The upper edge portion and the lower edge portion of the side face directed to the outside of the resin block are each provided with a single notch, and the exterior material is provided with a locking piece of the mounting member in the notch of the foamed resin block. The lightweight embankment of Claim 2 attached to the side surface of the said foamed resin block by inserting.   The lightweight embankment according to any one of claims 1 to 3, wherein the exterior material is a composite plate formed by laminating a metal sheet on the surface of a synthetic resin sheet.   The lightweight embankment according to claim 4, wherein the composite plate is an incombustible material.   The lightweight embankment according to claim 4 or 5, wherein the exterior material has a granite-like surface finish.   It is a foamed resin block used for an outer peripheral part in the lightweight embankment according to any one of claims 1 to 6, wherein a composite plate or a metal plate formed by laminating a metal sheet on the surface is used as an exterior material. A lightweight foamed resin block for embankment, characterized in that it can be mounted.

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