JP6237004B2 - Lightweight embankment structure - Google Patents

Description

  The present invention relates to a lightweight embankment structure having a embankment portion in which foamed resin blocks are stacked in a laminated form.

  Lightweight embankment structure that uses foamed resin blocks such as expanded polystyrene (EPS) as a light-weight embankment structure when building roads on natural slopes or widening roads or parking spaces constructed on natural slopes The embankment structure is widely used in place of the soil embankment structure.

  When constructing this lightweight embankment structure, the ground is shaved to form the supporting ground, and the foundation concrete is constructed on a substantially horizontal horizontal portion at the lower end of the supporting ground. The supporting wall is constructed by standing up and down at appropriate intervals, and a retaining wall portion is constructed by fixing a protective wall surface material that imparts weather resistance, such as an extruded cement board, to the outer surface side of the supporting column. Foamed resin blocks are stacked between the inclined surfaces to form the embankment part, and a concrete floor slab is constructed at least on the upper surface of the embankment part. For example, every 3 m in height (0.5 m in height of the foamed resin block) In every 6th layer), concrete floor slabs are also laminated between the foam resin blocks adjacent to the top and bottom to adjust for unevenness, load distribution, foam resin block fixation and buoyancy measures. And the support Connected by sintering metal, will applying a roadbed and asphalt paving on the concrete slab of the embankment portion top surface.

  In the lightweight embankment structure, since the foamed resin block is an elasto-plastic body, the foamed resin block is compressed and deformed by an overload such as a roadbed or asphalt pavement, and the concrete floor slab on the embankment sinks. However, since the columns installed upright on the foundation concrete hardly sink, the subsidence of the concrete floor slab causes an excessive tensile load to act on the connecting brackets connecting the concrete floor slab and the columns. There are concerns about the occurrence of problems such as shear fracture and disconnection of connecting fittings. Therefore, in order to prevent the occurrence of such a problem, a pair of locking portions for locking both ends of the flange portion of the column made of H-shaped steel so as to be slidable in the vertical direction is provided at the tip of the coupling metal. (For example, refer to Patent Document 1.) A locking portion that can be locked by line contact is provided on the flange portion of a column made of H-shaped steel at the tip of the connecting metal (for example, see Patent Document 2). A movable metal fitting having an elongated hole in the vertical direction is provided at the tip of the lens, and a slide member that is slidable along the elongated hole is provided on the support metal fitting fixed to the support column (for example, see Patent Document 3). There has been proposed one in which the end of the connecting metal is connected to the support column so as to be movable in the vertical direction.

JP 2002-317447 A JP 2006-176977 A JP 2004-244864 A

  However, in the inventions described in Patent Documents 1 and 2, due to the slide between the locking portion of the connecting metal fitting and the support column, and in the invention described in Patent Document 3, the slide is provided between the elongated hole of the moving metal fitting and the slide member of the support metal fitting. In each case, the concrete floor slabs are connected to the column so as to be movable in the vertical direction. In any case, since the steel materials are moved in the vertical direction by sliding between them, foreign matter may be caught between the sliding parts. , When the sliding direction of the connecting bracket is tilted relative to the vertical direction, the steel materials are strongly meshed and locked so that they cannot move up and down, and an excessive tensile load is applied to the locking part and slide member, causing damage to the struts and the connecting bracket. There are concerns about the occurrence of problems such as shear fracture of the metal and disconnection of the connecting metal fittings.

  In particular, in the light-weight embankment structure when roads are constructed on natural slopes or roads and parking spaces constructed on natural slopes are widened, the thickness of the embankment made of foamed resin blocks is the ground. Since the mountain side becomes thinner, the settlement of the embankment due to the overload of the concrete slab does not settle with a uniform amount of sinking, but sinks so that the amount of sinking increases as it moves away from the ground. The concrete slab sinks in an inclined shape so as to become lower as it goes to the protective wall side. For this reason, in the inventions described in Patent Documents 1 to 3, the connecting bracket is inclined with the concrete floor slab and the end portion of the concrete floor slab on the ground mountain side, and the press-contact portion of the locking portion of the connecting bracket with respect to the column is the ground. Trying to move to the mountain side, the latching part bites into the column and locks so that it can not move up and down, or the slide member bites into the inner surface of the elongated hole and locks so that it can not move up and down, and the latching part and slide member are oversized There is a great concern about the occurrence of problems such as damage to the struts, shear failure of the connecting bracket, and disconnection of the connecting bracket due to the excessive tensile load.

  In addition, in the inventions described in Patent Documents 1 and 3, since the number of parts constituting the coupling metal is large and the weight of the coupling metal becomes heavy, the construction work of the coupling metal during the construction of the concrete floor slab becomes complicated, There is a problem that the workload of construction work increases. Moreover, since the number of parts which comprise a connection metal fitting increases, there exists a problem that the manufacturing cost of a lightweight embankment structure becomes high correspondingly.

  The purpose of the present invention is to prevent the hook part of the connecting bracket from biting into the column and locking it so that it cannot move up and down due to the settlement of the concrete slab due to the overload, and the number of parts of the connecting bracket is small, lightweight, and connected It is to provide a lightweight embankment structure that can reduce the manufacturing cost of the metal fittings and can improve the workability of the connecting metal fittings.

  The lightweight embankment structure according to the present invention is constructed by laminating foam resin blocks in a stacked manner, and at least on the top surface of the embankment portion in a laminate, and if necessary, between specific foam resin blocks adjacent vertically A concrete floor slab constructed in a laminated manner, a protective wall material covering the outer surface of the embankment part and the concrete floor slab, and a column supporting the protective wall material standingly arranged between the embankment part and the protective wall material And a light-weight embankment structure comprising a connecting bracket for connecting the support column and the concrete slab, wherein the connecting bracket includes an anchor portion embedded in the concrete floor slab and an outer portion of the concrete floor slab from the anchor portion. A hook having a hook part that protrudes out of the side surface and engages with the support column so as to be movable in the vertical direction is provided. Those digits. In addition, the concrete floor slab constructed in a laminated form between the foamed resin blocks is provided for unevenness adjustment, load distribution, fixing of the foamed resin block, and measures for buoyancy, for example, every 3 m in height (0.5 m in height) In the foamed resin block, construction is performed on the embankment every 6 layers), and is omitted when the height of the embankment is less than 3 m.

  In this lightweight embankment structure, the hook part of the connecting bracket is engaged with the column so as to be movable in the vertical direction, so it can be applied by an overload such as a roadbed or asphalt pavement constructed on the concrete slab on the embankment part. Even when the foam resin block compresses and the concrete floor slab sinks, the connecting bracket moves together with the concrete floor slab, so an excessive tensile load acts on the hook part and the connecting bracket is damaged. , It is possible to prevent problems such as damage to the support column and disconnection of the connecting bracket from the concrete floor slab. In addition, since an elastic body is provided at least at the pressure contact part of the hook part, even if a foreign object is caught between the hook part and the pillar or the sliding direction of the connecting bracket is slightly inclined with respect to the vertical direction, it can be connected. It prevents the steel materials that make up the metal fittings and the struts from directly engaging with each other, prevents the hook part from directly biting into the struts and locking it so that it cannot move up and down, and an excessive tensile load is applied to the hook part. Therefore, it is possible to effectively prevent damage to the support column, shear fracture of the connection fitting, disconnection of the connection fitting, and the like. In particular, when this road is built on the slope of a natural mountain, or a road or parking space constructed on the slope of a natural mountain is widened using this lightweight embankment structure, the concrete floor slab is protected by an overload. The connecting metal sinks in the shape of a slope that falls downward on the wall surface, the connecting bracket tilts with the concrete floor slab, centering on the end of the concrete floor slab, and the press-contact part of the locking part of the connecting bracket to the support is moved to the ground. Although it is going to move, since the elastic body is provided in the pressure contact portion between the hook part of the connecting metal fitting and the column, the hook part directly bites into the column due to the compressive deformation of the elastic body and locks so that it cannot move up and down. This can be prevented, and it can be expected to effectively prevent damage to the support column, shear fracture of the connecting bracket, and disconnection of the connecting bracket due to an excessive tensile load applied to the hook portion. In addition, since the integrally formed product having the hook portion and the anchor portion can be adopted as the connecting metal fitting, the number of parts of the connecting metal fitting can be reduced and the weight can be reduced as compared with the connecting metal fittings described in Patent Documents 1 and 3. In addition, it is possible to improve the workability of the construction work of the connecting bracket during construction of the concrete slab, and to reduce the work load of the construction work. And since the number of parts of a connection metal fitting decreases, the manufacturing cost of a lightweight embankment structure can also be reduced by that much. Note that the thickness of the elastic body placed between the support and the hook part is such that the hook part does not bite into the support even if the concrete slab sinks in an inclined shape, depending on the size of the lightweight embankment structure, etc. Will be set to.

  Here, it is a preferred embodiment that the hook portion is integrally covered with the elastic body. The elastic body can be fixed to the connecting bracket with an adhesive or the like. However, when the hook is integrally covered, the workability and handling of the connecting bracket can be improved and the mounting strength to the hook can be easily improved. This is preferable because peeling of the elastic body from the hook portion can be prevented. As a material of the elastic body, a thermoplastic resin such as a soft vinyl chloride resin that can be compressed and deformed, is excellent in slipperiness, can be obtained at a low cost, and can be easily coated in a molten state on the hook portion can be suitably used. .

  Engage at least one of the formwork for construction of the concrete floor slab and the reinforcing bar embedded in the concrete floor slab to the connecting metal fitting, and the hook part rotates around the anchor part during construction of the concrete floor slab It is a preferred embodiment to provide a rotation restricting portion for restricting the rotation. In this case, it is possible to perform the construction work of the connecting metal fittings more efficiently by the rotation restricting portion. In other words, in this lightweight embankment structure, the hook is engaged with the support from the side, so when connecting the concrete floor slab, set the connecting bracket in the mold so that the hook of the connecting bracket is horizontal. Then, concrete is placed in the mold. However, if the connecting metal is simply placed on the reinforcing bar in the mold, it tends to rotate so that the hook part is on the lower side, so that the fixing work by the connecting metal number of the reinforcing metal becomes complicated. Therefore, in this lightweight embankment structure, a rotation restricting portion is provided on the connecting fitting, and the connecting fitting is connected to the formwork and at least one of the reinforcing bars so that the hook portion is held horizontally, and connected by a number wire or the like. Since the metal fittings can be fixed to the reinforcing bars, it is possible to more efficiently perform the work of connecting metal fittings during the construction of the concrete slab.

  Rotation restriction that embeds an embedded frame on the outer surface of the concrete floor slab at the position where the connecting bracket is to be installed, and passes through the through hole of the embedded mold frame in a non-rotatable manner on the outer surface side portion of the anchor portion of the connecting bracket. Forming the part is also a preferred embodiment. In this case, the rotation of the connecting bracket can be restricted by fitting the rotation restricting portion of the connecting bracket into the through-hole formed in the embedded mold, so that the concrete floor slab can be constructed without increasing the number of parts. Thus, it is possible to efficiently perform the construction work of the connecting bracket. Also, in this lightweight embankment structure, the foamed resin block abuts on the pillars other than the concrete floor slab construction position, and the synthetic resin material softer than the metal material that constitutes the pillars also at the concrete floor slab construction position. Since the embedded form frame made of a material such as wood comes into contact with the support, damage to the support due to the concrete portion being in direct sliding contact with the support can be prevented.

  It is also a preferred embodiment to use a hot forged product as the connection fitting. A connecting fitting made of a hot forged product is preferable because it has a dense metal structure and excellent mechanical strength such as tensile strength and bending strength.

  It is also a preferred embodiment that a pair of the connecting metal fittings is provided on both sides of the support column and the concrete floor slab with the support column interposed therebetween. Although it is possible to connect a support metal and a concrete floor slab by arranging one connection metal at the connecting portion between the support and the concrete slab, in the present invention, the connection metal has a hook portion at the end. Since a pair is used, by placing a pair of connecting brackets on both sides of the column, the pair of connecting brackets can be engaged with the column in a well-balanced manner, and there is an uneven load on the column. It can prevent acting.

  It is also a preferred embodiment that a resistance member serving as a pulling resistance is provided on the anchor portion. If comprised in this way, the extraction strength of the connection member with respect to a concrete floor slab can be raised.

  According to the lightweight embankment structure according to the present invention, the hook portion of the connecting bracket is engaged with the support column so as to be movable in the vertical direction, so that the roadbed and asphalt pavement constructed on the concrete floor slab on the embankment portion. Even if the foam resin block is compressed and deformed due to an overload, etc., the connecting bracket moves downward together with the concrete floor slab. It is possible to prevent problems such as breakage of the metal fittings, damage to the support columns, and disconnection of the metal fittings from the concrete slab. In addition, since an elastic body is provided at least at the pressure contact part of the hook part, even if a foreign object is caught between the hook part and the pillar or the sliding direction of the connecting bracket is slightly inclined with respect to the vertical direction, it can be connected. It prevents the steel materials that make up the metal fittings and the struts from directly engaging with each other, prevents the hook part from directly biting into the struts and locking it so that it cannot move up and down, and an excessive tensile load is applied to the hook part. Therefore, it is possible to effectively prevent damage to the support column, shear fracture of the connection fitting, disconnection of the connection fitting, and the like. In particular, when this road is built on the slope of a natural mountain, or a road or parking space constructed on the slope of a natural mountain is widened using this lightweight embankment structure, the concrete floor slab is protected by an overload. The connecting metal sinks in the shape of a slope that falls downward on the wall surface, the connecting bracket tilts with the concrete floor slab, centering on the end of the concrete floor slab, and the press-contact part of the locking part of the connecting bracket to the support is moved to the ground. Although it is going to move, since the elastic body is provided in the pressure contact portion between the hook part of the connecting metal fitting and the column, the hook part directly bites into the column due to the compressive deformation of the elastic body and locks so that it cannot move up and down. This can be prevented, and it can be expected to effectively prevent damage to the support column, shear fracture of the connecting bracket, and disconnection of the connecting bracket due to an excessive tensile load applied to the hook portion. In addition, since the integrally formed product having the hook portion and the anchor portion can be adopted as the connecting metal fitting, the number of parts of the connecting metal fitting can be reduced and the weight can be reduced as compared with the connecting metal fittings described in Patent Documents 1 and 3. In addition, it is possible to improve the workability of the construction work of the connecting bracket during construction of the concrete slab, and to reduce the work load of the construction work. And since the number of parts of a connection metal fitting decreases, the manufacturing cost of a lightweight embankment structure can also be reduced by that much.

Longitudinal section of lightweight embankment structure Cross-sectional view of a light-weight embankment near the connection bracket Sectional view along line III-III in Fig. 2 Sectional view taken along line IV-IV in FIG. Illustration of construction method of lightweight embankment structure Plan view near the hook of the connecting bracket (A) and (b) are longitudinal sectional views of resistance members having other configurations, respectively. (A) (b) is a top view of the resistance member of another structure, respectively Explanatory drawing of construction method of lightweight embankment structure of other composition XX sectional view of FIG. FIG. 11B is a cross-sectional view taken along the line bb of FIG. 11A.

Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings.
As shown in FIGS. 1 to 3, this lightweight embankment structure 1 is a wide embankment structure that widens a road, a parking space, etc. constructed on the slope of the natural ground M, and has a foamed resin block 3 on the support ground 2. The embankment portion 4 stacked and constructed, the concrete floor slab 5 constructed in a laminate between the upper surface of the embankment portion 4 and the foamed resin block 3 in the middle of the embankment portion 4 in the height direction, the embedding portion 4 and A protective wall material 6 that covers the outer surface of the concrete floor slab 5, a column 7 that supports the protective wall material 6, which is erected between the embankment 4 and the protective wall material 6, A connecting bracket 8 to be connected, a ground anchor 9 for fixing the uppermost concrete floor slab 5 to the ground M, a cap concrete 10 provided along a valley side portion of the upper surface of the uppermost concrete floor slab 5, Roadbed constructed on the upper concrete floor slab 5 Includes 1, the asphalt pavement 12 was constructed on the roadbed 11.

  The supporting ground 2 includes an existing inclined surface 21 including an existing retaining wall 20, an inclined surface 22 constructed by excavating a natural ground M below the inclined surface 21, and substantially horizontal from a lower end portion of the inclined surface 22. And a support surface 23 extending outward (valley side). However, it is also possible to newly install the supporting ground 2 for the natural ground M1 that does not include the existing retaining wall 20.

  The support column 7 is made of H-shaped steel, and the flange portion 7a is arranged on the natural ground M side and the valley side, the web portion 7b is arranged in the front-rear direction toward the natural mountain side, and the lower half portion is the natural mountain M. A plurality of support surfaces 23 are provided in the middle of the support surface 23 in the width direction and spaced apart from each other along the length direction of the support surface 23 extending in the left-right direction toward the natural ground M. . The strut 7 can be made of square steel or groove steel, but it is preferable to use H-section steel because the connection fitting 8 can be easily engaged.

  A protective wall surface material 6 covering substantially the entire outer surface side of the embankment portion 4 and the outer surface side of the concrete floor slab 5 is fixed to the outer surface side of the column 7 with a fixing tool (not shown) such as a bolt. As this protective wall material 6, an outer wall material having a known structure such as a metal plate, a synthetic resin plate, or a hydraulic binder can be adopted. However, considering that it is used as the outer wall of the lightweight embankment structure 1, environmental resistance and portability are provided. It is possible to suitably employ a ceramic exterior material such as an extrusion-molded cement board that has excellent properties and workability.

  Although the thickness of the protective wall surface material 6 can be set arbitrarily, if it is too thick, it will become heavy and carryability and workability will deteriorate, and if it is too thin, sufficient strength and rigidity as an outer wall cannot be obtained. For this reason, when the protective wall surface material 6 consists of ceramics-type exterior materials, the thickness is preferably about 5 mm to 70 mm.

  A foundation concrete 24 is constructed on the support surface 23, and the foamed resin blocks 3 are stacked in a plurality of stages between the protective wall material 6 and the inclined surfaces 21, 22. The embankment part 4 is comprised. The foamed resin blocks 3 arranged at the top and bottom are stacked in a staggered manner with the arrangement positions shifted in the front-rear direction and the left-right direction toward the inclined surfaces 21, 22, and the adjacent foamed resin blocks 3 are for preventing lateral displacement. It is connected by a stopper (not shown) so that relative movement is impossible.

  The size of the foamed resin block 3 can be arbitrarily set. For example, a rectangular parallelepiped foamed resin block 3 having a length of 2 m, a width of 1 m, and a height of 0.5 m is used as a basic size. Cut into length and constructed. The foamed resin block 3 having such a size is, for example, 10 kg to 50 kg per piece, and can be suitably employed because it is easy to carry and has excellent workability in the construction work of the lightweight embankment structure 1. As the material of the foamed resin block 3, a foam made of a synthetic resin such as polystyrene, polyurethane, or polyvinyl chloride can be used. The number of product stages of the foamed resin blocks 3 can be arbitrarily set according to the size of the lightweight embankment structure 1 and the like.

  Between the inclined surfaces 21 and 22 and the foamed resin block 3 is filled with a water-permeable backfilling material 25 made of crushed stone or the like, and rainwater or the like that has entered between the foamed resin block 3 and the inclined surface 21 is directed to the foundation concrete 24 side. It is configured to drain smoothly.

  The concrete floor slab 5 is constructed between the first and second foam resin blocks 3, between the seventh and eighth foam resin blocks 3, and above the uppermost foam resin block 3. The upper concrete floor slab 5 is fixed to the natural ground M by a ground anchor 9. These three concrete floor slabs 5 have different planar dimensions, but are similarly configured except for the planar dimensions. The concrete floor slab 5 is constructed at least on the upper surface of the embankment portion 4 (the upper surface of the uppermost foamed resin block 3), and the concrete floor slab 5 disposed in the middle of the embankment portion 4 in the height direction is adjusted for unevenness. In order to prevent load distribution, fixing of the foamed resin block 3 and measures for buoyancy, for example, a light-weight embankment provided with a height of every 3 m (every 6 layers in a foamed resin block 3 with a height of 0.5 m) and having a small number of stacks. It will be omitted in the structure. The ground anchor 9 can be omitted when the lightweight embankment structure 1 is small.

  As shown in FIG. 5, the concrete floor slab 5 is constructed with a mold frame 30 on the outer peripheral portion on the upper side of the embankment part 4, and after a reinforcing bar 31 and a connecting metal fitting 8 are constructed in the mold frame 30, a concrete 34 is placed. And it is constructed on site by curing and curing. The thickness of the concrete slab 5 can be arbitrarily set, but can be set to, for example, 100 to 200 mm in order to obtain sufficient strength. The reinforcing bar 31 is formed by welding and fixing a reinforcing bar 31a extending in the left-right direction toward the natural mountain side and a reinforcing bar 31b extending in the front-rear direction in a lattice shape, and is embedded in a substantially central portion of the concrete slab 5 in the thickness direction. ing. However, as the reinforcing bar 31, one having an arbitrary configuration can be adopted.

  As shown in FIGS. 2 to 6, the connecting fitting 8 is formed of a hot forged product, and as shown in FIGS. 2 to 6, the anchor portion 8 a embedded in the concrete floor slab 5 and the anchor portion 8 a are protected from the outer surface of the concrete floor slab 5. It has a hook portion 8b that protrudes toward the wall surface material 6 and engages with the flange portion 7a of the support column 7 so as to be movable in the vertical direction. It is provided as a pair, and the right and left hook portions 8b are engaged with both sides of the flange portion 7a on the ground mountain M side of the support column 7 to be connected to the support column 7, and horizontally arranged in parallel from the support column 7 toward the natural mountain M side. Has been. In the present embodiment, a pair of connecting fittings 8 are provided at positions corresponding to the columns 7 of the concrete floor slab 5 so that the columns 7 can be held in a balanced manner. It is also possible to provide only one connection fitting 8 at a position where the connection is made.

  An elastic body 13 that is coated with a synthetic resin material is integrally provided at the tip of the hook portion 8b so as to include at least a contact portion with the flange portion 7a of the column 7. As the synthetic resin material constituting the elastic body 13, any synthetic resin material can be adopted as long as it has a low sliding resistance with the support column 7 and can be compressed and deformed by a pressure contact load of the connecting fitting 8 to the support column 7. Since it can coat | cover easily with respect to the front-end | tip part of the hook part 8b, what consists of a thermoplastic synthetic resin material is preferable, a polyethylene resin, a urethane resin, a fluororesin, PPS (polyphenylene sulfide), a nylon resin, an epoxy resin, and a flexible vinyl chloride resin Rigid vinyl chloride resin, polyester resin, natural rubber, synthetic rubber, etc. can be employed, and since they are particularly inexpensively available, have excellent weather resistance, and can be thickly coated, it is preferable to use a soft vinyl chloride resin.

  The thickness t of the elastic body 13 is the ground M of the contact portion of the hook portion 8b with the support column 7 when the concrete floor slab 5 is inclined around the end of the ground M due to the compression deformation of the foamed resin block 3. It is preferable to set the thickness to be equal to or greater than the moving distance to the side, for example, 1 to 5 mm. The elastic body 13 is preferably integrally covered with the hook portion 8b of the connection fitting 8. However, the elastic body 13 is configured to be applied to the hook portion 8b of the connection fitting 8 and the flange portion 7a of the support column 7 with an adhesive or the like. It is also possible to do.

  A threaded portion 8d is formed at the end of the anchor 8a of the coupling metal 8 opposite to the hooked portion 8b, and a resistance member 14 made of a nut member for retaining the screw is screwed into the threaded portion 8d. 14, the pull-out strength of the connecting metal fitting 8 from the concrete floor slab 5 is increased.

  However, instead of the resistance member 14, as shown in FIG. 7 (a), a pair of nut members 15 screwed into the screw portion 8d and an insertion hole 16a through which the screw portion 8d can be inserted are provided, and a foamed resin is provided. A resistance member 14 </ b> A composed of a metal elongated plate-like member 16 extending to the upper surface of the block 3 may be used. In this case, the insertion hole 16a is inserted into the threaded portion 8d, the plate-like member 16 is attached to the anchor portion 8a on the hook portion 8b side with respect to the nut member 15, and a plate-like shape is formed on the ground side of the reinforcing bar 31a extending in the left-right direction. The resistance member 14 is assembled so that the member 16 abuts. As the resistance member 14, an arbitrary shape such as a rectangular shape, a square shape, or a circular shape can be adopted. Moreover, as shown in FIG.7 (b), it replaces with the plate-shaped member 16 and uses the plate-shaped member 16B which consists of an L-shaped metal plate, and the plate-shaped member 16B is engaged with the mountain side of the reinforcing bar 31a extended in the left-right direction. As described above, the plate-like member 16B is attached to the anchor portion 8a, and instead of the resistance member 14, a resistance member 14B including a pair of nut members 15 and the plate-like member 16B can be used. In this case, it is possible to prevent the connecting fitting 8 from coming off from the concrete floor slab 5 by the engagement between the plate-like member 16B and the reinforcing bar 31a. Further, a spectacle nail is inserted into the mounting position of the plate-like member 16 of the connecting fitting 8 in place of the plate-like member 16 and the screw portion 8d is inserted into the hole of the spectacle nail, and the tip of the spectacle nail is inserted into the foamed resin block 3. It is possible to stabilize the posture at the time of construction of the connection fitting 8 with the spectacles nail and to prevent the connection fitting 8 from the concrete floor slab 5 from being detached with the spectacles nail.

  Further, as shown in FIG. 8A, the screw portion 8d is omitted, and instead of the resistance member 14, the end portion of the anchor portion 8a is attached to the end portion of the anchor portion 8a opposite to the hook portion 8b. A resistance portion 14C bent in an L shape is provided, or, as shown in FIG. 8B, the screw portion 8d is omitted, and instead of the resistance member 14, an anchor portion 8a opposite to the hook portion 8b. It is also possible to provide a resistance portion 14D formed by bending the end portion of the anchor portion 8a in a U shape at the end portion.

  A prismatic rotation restricting portion 8c is formed at the end of the anchor portion 8a of the connecting fitting 8 on the hook portion 8b side, and the outer surface side of the concrete floor slab 5 (corresponding to the arrangement position of the column 7 and the connecting fitting 8 ( A rectangular embedded mold frame 32 made of a synthetic resin material or wood that is softer than the metal material constituting the support column 7 is embedded in the protective wall material 6 side). A pair of through-holes 32a having a square hole shape through which the rotation restricting portion 8c of the connecting fitting 8 is inserted so as not to be relatively rotatable is formed.

  As described above, since the embedded form frame 32 is made of a material softer than the metal material constituting the column 7, damage to the column 7 due to contact between the concrete floor slab 5 and the column 7 can be prevented. it can. Further, since the rotation restricting portion 8c of the connecting metal fitting 8 is fitted into the through hole 32a of the embedded mold frame 32 so as not to be relatively rotatable, the workability of the connecting metal fitting 8 when the concrete floor slab 5 is constructed is improved. it can. That is, when the concrete slab 5 is constructed, the hook 8b is engaged with the flange portion 7a of the column 7 so that the connecting metal fitting 8 is connected to the reinforcing bar 31 with the wire 33 so that the hook portion 8b is arranged substantially horizontally. However, since the hook portion 8b tends to rotate downward about the anchor portion 8a by its own weight, the construction work of the connecting fitting 8 on the reinforcing bar 31 is complicated. However, when the rotation restricting portion 8c of the connection fitting 8 is fitted in the through hole 32a of the embedded mold 32 as described above, the connection fitting 8 is controlled in the state where the rotation of the connection fitting 8 is restricted by the embedded mold 32. Can be temporarily fixed to the reinforcing bar 31 by the wire 33, so that the temporary fixing operation of the connecting fitting 8 to the reinforcing bar 31 can be performed efficiently. However, when the reinforcing bar 31 is constructed so that the reinforcing bar 31a extending in the left-right direction of the reinforcing bar 31 is disposed below the reinforcing bar 31b extending in the front-rear direction, the upper and lower sides of the embedded form frame 32 are reversed. Thus, it is preferable to form the through hole 32a in the embedded mold frame 32 so that the through hole 32a is disposed at an appropriate position.

  Note that the rotation restricting portion 8c and the through hole 32a of the embedded mold frame 32 can be configured to have an arbitrary cross-sectional shape as long as they can be fitted so as not to be relatively rotatable, for example, a square shape, a rectangular shape, or a hexagonal shape. It can be formed in a polygonal shape such as an oval shape or an oval shape, or one or a plurality of convex portions or concave portions can be formed in the circumferential direction.

  Further, the embedded mold 32 is omitted, and the base 30 having the rectangular cross section on the anchor portion 8a side of the rotation restricting portion 8c or the hook portion 8b of the connecting bracket 8 is relative to the mold 30 for constructing the concrete floor slab 5. It can also be fitted so that it cannot rotate. Specifically, as shown in FIGS. 9 and 10, the end portion 30 a of the mold frame 30 is provided so as to abut against the side end portion of the flange portion 7 a on the ground mountain side of the support column 7, and the height of the end portion 30 a of the mold frame 30 is increased. A square cut portion 30b in which the base portion of the hook portion 8b of the connection fitting 8 is fitted so as not to be relatively rotatable can be formed in the middle of the vertical direction. In this case, even when the base portion of the hook portion 8b is fitted to the notch portion 30b, a hole 35 that communicates the inside and the outside of the mold 30 is formed in the notch portion 30b. The concrete floor slab is prevented so that the pillar 7 does not leak and prevents the pillar 7 from coming into close contact with the concrete 34 of the concrete floor slab 5 and the relative movement between the pillar 7 and the concrete floor slab 5. The sheet material 36 made of a synthetic resin sheet, a foamed resin sheet, or the like extending from the support column 7 to the left and right sides is disposed on the natural mountain side of the support column 7 facing the construction position 5. In addition, when fitting the base part of the hook part 8b in the notch part 30b in this way, the rotation control part 8c can be abbreviate | omitted and the hook part 8b can be functioned as a rotation control part.

  Further, as a structure for restricting the rotation of the connection fitting 8, the connection fitting 8 cannot be rotated relative to the reinforcing bar 31 in addition to the structure in which the connection fitting 8 is engaged with the mold frame 30 or the embedded mold frame 32 so as not to rotate relative to each other. It is also possible to adopt a structure that engages with. Specifically, a rotation restricting plate 41 made of an elongated metal plate having a length larger than the interval between adjacent reinforcing bars 31a extending in the left-right direction is welded to the lower surface of the anchor portion 40a as in the connection fitting 40 shown in FIG. The rotation restricting plate 41 can be placed on the rebar 31 when the concrete floor slab 5 is constructed, and the connecting fitting 40 can be placed on the rebar 31 so as not to rotate. In this case, the rotation restricting plate 41 also functions as a stopper for removing the connection fitting 40 from the concrete floor slab 5.

  In the present embodiment, the connecting metal fitting 8 is formed of a hot forged product so as to increase the mechanical strength such as tensile strength and bending strength. However, it is possible to ensure sufficient mechanical strength. For example, it is also possible to employ a connecting bracket formed by bending a metal rod having a round or square cross section and performing a heat treatment such as quenching. In the case of a metal rod having a round cross section, it has an anchor portion 40a and a hook portion 40b made of a metal rod, for example, like a connecting fitting 40 shown in FIG. 11, and one end portion of the metal rod is bent. The hook portion 40b is formed, the rotation restricting plate 41 is fixed to the lower surface of the middle portion of the anchor portion 40a by welding or the like, and the screw portion 40d is formed at the end of the anchor portion 40a opposite to the hook portion 40b. It is possible to employ a screw member 40d in which a pair of resistance members 14 made of nut members are screwed together. However, when the pull-out resistance of the connecting member 40 is sufficiently obtained by the rotation restricting plate 41, the screw portion 40d and the resistance member 14 can be omitted.

  Moreover, as the connection metal fitting 8, the anchor part embed | buried under the concrete floor slab 5, the hook part which protrudes out of the outer surface of the concrete floor slab 5 from the anchor part, and engages with the support | pillar 7 so that a vertical movement is possible Any configuration can be adopted as long as it has the following. In addition, although it is preferable to provide the rotation control part engaged with at least one of the mold frame 30 or the embedded mold frame 32 and the reinforcing bar 31 so as not to rotate relatively, the omitted one is also included in the scope of the present invention.

Next, the construction method of the lightweight embankment structure 1 is demonstrated.
First, as shown in FIG. 1, the ground M <b> 1 is excavated to construct the supporting ground 2, the foundation concrete 24 for unevenness adjustment is constructed on the supporting surface 23 of the supporting ground 2, and the length of the foundation concrete 24 is set. A plurality of support columns 7 are erected along the direction. In addition, when the natural ground M is weak etc., in order to raise the construction strength of the support | pillar 7, it is also preferable to embed the lower half part of the support | pillar 7 in the natural ground M.

  Next, the first-stage protective wall material 6 is fixed to the column 7, and the adjacent wall 7 is covered with the protective wall material 6, and then the first-stage foamed resin block 3 is laid on the foundation concrete 24. At the same time, the adjacent foamed resin blocks 3 are connected to each other with a stopper, and then the backfilling material 25 is filled between the foamed resin block 3 and the inclined surface 21, and the backfilling material 25 is rolled and compacted.

  In this way, after the first-stage foamed resin block 3 is laid, a concrete floor slab 5 is constructed on the upper side of the first-stage foamed resin block 3, as shown in FIG. The mold 30 is constructed along the outer peripheral edge of the layer of the resin block 3, and the reinforcing bar 31 is constructed in the mold 30. Next, the anchor portion 8a of the connecting metal fitting 8 is inserted into the through hole 32a of the embedded mold frame 32, the pair of connecting metal fittings 8 are attached to the embedded mold frame 32, and the screw portion 8d is made of a resistance made of a nut member. The embedded mold 32 is assembled to the mold 30 by screwing the members 14 together. Next, the hook portion 8 b is positioned horizontally so that the hook portion 8 b of the connecting bracket 8 engages with the flange portion 7 a of the support column 7, and the rotation restricting portion 8 c of the connecting bracket 8 passes through the embedded mold frame 32. The hook portion 8b is held horizontally by being fitted into the hole 32a so as not to be relatively rotatable. Next, after moving the connection fitting 8 to the natural ground M side so that the hook portion 8 b comes into contact with the flange portion 7 a of the support column 7, the anchor portion 8 a of the connection fitting 8 is fixed to the reinforcing bar 31 with the wire 33. In this way, the reinforcing bars 31 are constructed in the mold 30 and the pair of connecting fittings 8 are sequentially constructed at positions corresponding to the columns 7, and then the concrete 34 is placed and the concrete floor slab 5 is constructed.

  Next, after curing and solidifying the first-stage concrete floor slab 5, the second-stage protective wall material 6 is fixed to the columns 7, and the space between the adjacent columns 7 is covered with the protective wall material 6. The second foamed resin block 3 is laid on top of each other, the adjacent foamed resin blocks 3 are connected to each other with a stopper, and then the foamed resin block 3 on the most inclined surface 21 side and the inclined surface 21 are connected. The backfill material 25 is filled, and the backfill material 25 is rolled and compacted. In this way, the second-stage foamed resin block 3 is laid, and then the protective wall material 6, the foamed resin block 3, and the backfill material 25 in the third to seventh stages are sequentially applied in the same manner as the second stage. .

  After laying the seventh-stage foamed resin block 3 in this way, the formwork 30 is constructed along the outer periphery of the layer of the seventh-stage foamed resin block 3 in the same manner as the first-stage concrete floor slab 5. Then, after the reinforcing bar 31, the embedded mold 32, and the connecting metal fitting 8 are constructed, the concrete 34 is placed and the second-stage concrete slab 5 is constructed.

  Next, after curing and solidifying the second-stage concrete floor slab 5, the eighth-stage protective wall material 6 is fixed to the columns 7, and the space between adjacent columns 7 is covered with the protective wall material 6. The foam resin block 3 of the 8th step is laid and constructed on 5 and the adjacent foam resin blocks 3 are connected to each other with a stopper, and then the foam resin block 3 and the inclined surface arranged closest to the inclined surface 21 side. The backfilling material 25 is filled between 22 and the backfilling material 25 is rolled and compacted. In this way, the 8th-stage foamed resin block 3 is laid, and then the protective wall material 6, the foamed resin block 3 and the backfilling material 25 from the 9th stage to the 13th stage are sequentially applied in the same manner as the 8th stage. .

  Next, after laying the 13th-stage foamed resin block 3, the ground anchor 9 is constructed, and the top surface of the layer of the 13th-stage foamed resin block 3 is installed in the same manner as the first-stage concrete floor slab 5. After constructing the mold 30 along the outer peripheral edge, constructing the reinforcing bar 31, the embedded mold 32, and the connecting bracket 8, the concrete 34 is placed, the concrete slab 5 is constructed, and the third stage The light-weight embankment structure 1 is constructed by constructing the shade concrete 10 on the outer edge of the upper side of the concrete floor slab 5 and constructing the road bed 11 and the asphalt pavement 12 on the upper side of the third-stage concrete floor slab 5. The protective wall material 6 can be applied to the support column 7 at an arbitrary timing before the foamed resin block 3 on the ground mountain M side facing the protective wall material 6 is applied.

  In this lightweight embankment structure 1, the hook portion 8 b of the connecting metal fitting 8 is engaged with the support column 7 so as to be movable in the vertical direction. Therefore, the cap concrete 10 constructed on the concrete floor slab 5 on the embankment portion 4. Even when the foamed resin block 3 is compressed and deformed due to the overload of the roadbed 11 and the asphalt pavement 12 and the concrete floor slab 5 sinks, the connecting bracket 8 moves downward together with the concrete floor slab 5, so that the hook portion It is possible to prevent a problem that an excessive tensile load acts on 8b, the connecting metal fitting 8 is broken, the support column 7 is damaged, or the connecting metal fitting 8 is detached from the concrete floor slab 5. Moreover, since the elastic body 13 is provided at least in the pressure contact portion of the hook portion 8b with the support column 7, foreign matter is caught between the hook portion 8b and the support column 7, or the sliding direction of the connecting bracket 8 is slightly inclined with respect to the vertical direction. Even in the case where the steel members constituting the connecting metal fitting 8 and the support column 7 are directly engaged with each other, it is possible to prevent the hook portion 8b from directly biting into the support column 7 and being locked so as not to move up and down. In addition, it is possible to effectively prevent damage to the support column 7, shear fracture of the connection fitting, and disconnection of the connection fitting 8 due to an excessive tensile load applied to the hook portion 8 b. In particular, when the concrete floor slab 5 sinks in a slanted shape with a downward slope on the side of the protective wall material 6 due to the overload, the connecting metal fitting 8 is moved together with the concrete floor slab 5 on the ground M side of the concrete floor slab 5 as shown in FIG. The pressure contact portion C of the hook portion 8b of the connection fitting 8 is inclined toward the ground M side while being inclined with the end P as the center, but the pressure contact portion between the hook portion 8b of the connection fitting 8 and the support column 7 is moved. Since the elastic body 13 is provided in C, it is possible to prevent the hook portion 8b from biting into the support column 7 due to compression deformation of the elastic body 13 and locking it so that it cannot move up and down, and an excessive tensile load is applied to the hook portion 8b. Accordingly, it is possible to effectively prevent damage to the support column 7, shear fracture of the connection fitting 8, and disconnection of the connection fitting 8. Further, since the connecting fitting 8 employs an integrated product having the hook portion 8b, the anchor portion 8a, and the rotation restricting portion 8c, the number of parts of the connecting fitting 8 can be reduced and the weight can be reduced. In addition to improving the workability of the construction work of the connecting bracket 8 during construction, it is possible to reduce the work load of the construction work. In addition, since the number of parts of the connecting metal fitting 8 is reduced, the manufacturing cost of the lightweight embankment structure can be reduced accordingly. Further, by providing the connection fitting 8 with the rotation restricting portion 8c, the construction work of the connection fitting 8 can be performed more efficiently.

  In the above embodiment, the case where the present invention is applied to a light-weight embankment structure when widening an existing road has been described. However, the present invention is a light-weight embankment when a road or a parking lot is newly installed on an inclined land or the like. It can also be applied to structures.

  The embodiment of the present invention has been described above. However, the present invention is not limited to the above-described embodiment, and it goes without saying that the configuration can be changed without departing from the gist of the present invention.

DESCRIPTION OF SYMBOLS 1 Lightweight embankment structure 2 Support ground 3 Foam resin block 4 Embankment part 5 Concrete floor slab 6 Protective wall material 7 Support | pillar 7a Flange part 7b Web part 8 Connecting metal fitting 8a Anchor part 8b Hook part 8c Rotation restriction part 8d Screw part 9 Ground anchor 10 Reinforced concrete 11 Roadbed 12 Asphalt pavement 13 Elastic body 14 Resistance member 14A Resistance member 14B Resistance member 16B Plate member 14C Resistance portion 14D Resistance portion 15 Nut member 16 Plate member 16a Insertion hole 20 Retaining wall 21 Inclined surface 22 Inclined surface 23 Support Surface 24 Basic concrete 25 Backfill material 30 Formwork 30a End 30b Cut part 31 Reinforcing bar 31a Reinforcing bar 31b Reinforcing bar 32 Embedded mold frame 32a Through hole 33 Wire 34 Concrete 35 Hole 36 Sheet material 40 Connecting bracket 40a Anchor part 40b Hook part 40d Screw part 41 Rotation restricting plate C Pressure contact part Minute M Ground Mountain M1 Ground Mountain P End

Claims (6)

A concrete floor slab that is constructed by laminating foam resin blocks in a stacked manner, and at least the top surface of the embankment portion in a laminated manner and, if necessary, a specific floor between adjacent foam resin blocks. A protective wall surface material covering the outer surface of the embankment part and the concrete floor slab, a column supporting the protective wall surface material arranged upright between the embankment part and the protective wall surface material, the column and the concrete floor slab A light-weight embankment structure with a connecting bracket for connecting
The connecting metal fitting has an anchor part embedded in the concrete floor slab, and a hook part protruding from the anchor part to the outside of the concrete floor slab and movably engaged with the support column in the vertical direction. Use
In the construction position of the connecting bracket, on the outer surface portion of the concrete floor slab, an embedded mold is provided that constitutes a part of the mold for construction of the concrete floor slab,
The anchor portion is engaged with the embedded mold frame by non-rotatably penetrating the through hole of the embedded mold frame in the outer surface side portion of the concrete floor slab, and the anchor section is provided during construction of the concrete floor slab. A rotation restricting part that restricts the rotation of the hook part at the center is provided,
An elastic body is provided at least in the pressure contact portion with the support in the hook portion.
Lightweight embankment structure characterized by that.   The lightweight embankment structure according to claim 1, wherein the hook body is integrally covered with the elastic body. The lightweight embankment structure according to claim 1 or 2 , wherein a hot forged product is used as the connection fitting. The lightweight embankment structure according to any one of claims 1 to 3 , wherein a pair of the connecting metal fittings is provided on both sides of the support column between the support column and the concrete slab. The lightweight embankment structure of any one of Claims 1-4 which provided the resistance member used as extraction resistance in the said anchor part. A concrete floor slab that is constructed by laminating foam resin blocks in a stacked manner, and at least the top surface of the embankment portion in a laminated manner and, if necessary, a specific floor between adjacent foam resin blocks. A protective wall surface material covering the outer surface of the embankment part and the concrete floor slab, a column supporting the protective wall surface material arranged upright between the embankment part and the protective wall surface material, the column and the concrete floor slab A light-weight embankment structure with a connecting bracket for connecting
The connecting metal fitting has an anchor part embedded in the concrete floor slab, and a hook part protruding from the anchor part to the outside of the concrete floor slab and movably engaged with the support column in the vertical direction. Use
Forming a part of the concrete floor slab formwork on the outer surface of the concrete floor slab at the construction position of the connecting bracket, making it possible to contact an embedded form frame that is softer than the strut to the post. Provided,
An elastic body is provided at least in the pressure contact portion with the support in the hook portion.
Lightweight embankment structure characterized by that.

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