JP2012172503A - Foundation member for supporting outdoor facility and foundation structure for supporting outdoor facility - Google Patents

Abstract

PROBLEM TO BE SOLVED: To greatly reduce compression fracture of a foamed resin-made foundation due to a horizontal load from a column (outdoor facility) in a support structure of a column (outdoor facility) foundation part using a foamed resin molding as a foundation.SOLUTION: A foundation member A for supporting outdoor facilities includes a foamed resin-made foundation 30 having a through hole 35, a first support plate 10 made of a material harder than foamed resin constituting the foamed resin-made foundation 30 and arranged on one end face 36 of the foamed resin-made foundation 30, and a second support plate 20 arranged on the other end face 37 of the foamed resin-made foundation 30. A lower part of a column (outdoor facility) 40 is fixed to the first support plate 10 and second support plate 20 while inserted into the through hole 35, and buried in the foundation S in the state.

Description

  The present invention relates to a base member for external support for installing external materials (housing external materials) such as fences, fences, car stoppers, etc. on the ground, and an external foundation portion using the external support base member. It relates to the support structure.

  Conventionally, on-site reinforced concrete is often used as a foundation to install the exterior materials as described above on the ground. Since it takes time and effort to place reinforcements and place concrete for reinforced concrete at the site of external installation, a reinforced concrete foundation made in a box shape in advance is buried in the ground and external materials are placed there. It has been proposed to attach (see Patent Document 1). However, since the weight of the reinforced concrete foundation itself is heavy, it is not easy to transport the reinforced concrete foundation and install it on site, and it involves the disadvantage that heavy machinery is required.

  Then, the columnar structure which uses the foaming resin molding which is lightweight as a support | pillar foundation is proposed (refer patent document 2). There, the ground buried part of the column is inserted loosely into the column insertion hole provided in the foundation made of foamed resin, and mortar, concrete, etc. are cured in the gap formed between the column insertion hole inner surface and the column Filling material is filled and cured, and the pressure-receiving area against the wind load in the foamed resin foundation is increased compared to the case where the support is directly supported by the foamed resin foundation. It is described that the foamed resin base can be prevented from being destroyed because the acting compressive load is reduced accordingly.

Japanese Utility Model Publication No. 5-77336 JP 2000-282714 A

  Since the columnar structure described in Patent Document 2 uses a foundation made of foamed resin, the construction period is short, transportation and construction are easy, and it has the advantage of being able to be well constructed even in weak ground locations. ing. However, when wind pressure (horizontal load) is applied to the struts, since the compressive force of the ground is usually larger than the compressive force of the foamed resin, as shown in FIG. 7, before the wind pressure of the props is transmitted to the ground surface, There is a disadvantage that the foamed resin surface with which the curable filler is in contact cannot be avoided sufficiently due to compression failure and the support of the support column and the curable filler becoming unstable. In FIG. 7, L is the ground surface, 1 is a support, 2 is a foundation made of foamed resin, 3 is a cured filler, and the blacked-out portion shows the portion of the foamed resin surface that has been compressed and broken.

  The present invention provides a support structure for a support (external) base portion using a foamed resin molded body as a foundation, while the conventional advantages of being easy to construct and being able to be constructed at a low cost are utilized as they are, and a foundation made of a foamed resin molded body. Can greatly reduce the compressive failure due to horizontal load from the struts (exterior), and can be installed on the ground in a stable state for a long period of time. It is an object of the present invention to provide a support structure for a member and an exterior foundation.

  The foundation support base member according to the present invention is a foundation support base member including a foamed resin base as a part of the support member, and a through hole into which a lower part of the exterior structure embedded in the ground enters from one end face. A foamed resin base formed so as to extend over the other end face, an opening made of a material harder than the foamed resin constituting the foamed resin base, and an opening through which the exterior lower part can pass to the exterior lower part A first support plate provided with a fixing means and disposed on one end face of the foamed resin base, and a fixing means made of a material harder than the foamed resin constituting the foamed resin base, And a second support plate disposed on the other end face of the foamed resin base.

  According to the present invention, there is provided a structure for supporting a base of the exterior structure, wherein the base member for exterior support according to the present invention is configured such that the first support plate is disposed on the upper end surface of the foamed resin base and the second support plate is disposed on the lower end surface. Is embedded in the ground in a state of being closely contacted, and the lower part of the outer structure enters into the through-hole formed in the foamed resin base of the embedded base material for supporting the outer structure, and The first support plate and the second support plate are integrally fixed to the exterior support base member by fixing means formed on the first support plate and the second support plate.

  In the external structure foundation support structure according to the present invention, the horizontal force (moment force) generated when the ground portion of the external structure is subjected to wind pressure is generated by the inner peripheral surface of the through-hole formed in the foamed resin foundation. In addition to the contact surface with the lower part of the outer structure entering the penetrating premises, the upper end surface and the lower end surface of the base made of foamed resin through the first support plate and the second support plate fixed to the outer structure Also works. That is, the foamed resin base can receive a horizontal force generated when the ground portion of the exterior receives wind pressure in a wider area compared to the conventional support structure. . Thereby, it is possible to effectively avoid the occurrence of local compressive failure in the foamed resin base. Even when compression fracture occurs, the limit load of the horizontal force (moment force) generated when the ground portion of the outer structure receives wind pressure at that time is also a high value. For this purpose, a support structure for the exterior base portion having high stability is constructed.

  The extent of the area of the top and bottom end faces and the surrounding side walls of the foamed resin foundation depends on the construction site where the support structure is built and the ground surface of the external structure to be supported when designing the support structure. What is necessary is just to select suitably for every construction site according to the force of the horizontal direction assumed that a part receives.

  In the support structure for the exterior base portion according to the present invention, the exterior lower portion may extend below the lower end surface of the foamed resin base. In that case, the thing of the form provided with the opening which can pass the exterior lower part is used as said 2nd support plate.

  In the support structure of the exterior base portion according to the present invention, the foamed resin base may be an integrally molded product, or may be composed of two or more divided bodies divided in the axial direction of the through hole. . You may be comprised by the 2 or more division body divided | segmented in the direction perpendicular | vertical to the axis line of a through-hole. What is necessary is just to select suitably considering the ease of construction and the ease of attachment to the exterior lower part. Of course, in the case of the divided body, it is necessary to fix them integrally so as not to be separated by appropriate means such as bonding or using a fastening band or a sheet.

  In the support structure for the exterior base portion according to the present invention, the foamed resin base may have a flat peripheral side wall, and may have irregularities formed on the outer surface except for both end surfaces. In the latter case, when buoyancy occurs in the foam resin base due to the rise in the groundwater level, it is possible to increase the frictional resistance with the surrounding ground, and to prevent the support structure from becoming unstable. .

  In the outer structure foundation support structure according to the present invention, the inner peripheral surface of the through hole formed in the foamed resin foundation and the outer structure lower portion entering the penetration structure may be in surface contact with the entire surface. The part may be in surface contact or may not be in contact at all. In the case of a shape that is not in contact at all, the horizontal force generated when the ground part of the exterior receives wind pressure is applied to the top and bottom of the foamed resin base via the first and second support plates. When the foamed resin base sandwiched between the first and second support plates tries to rotate with the first and second support plates in the ground at the same time as receiving at the end face, the ground contact surface of the foamed resin base But you will receive it.

  What is necessary is just to set suitably the resin seed | species and foaming magnification which comprise the foam resin foundation which comprises the base member for exterior support, considering the maximum load which acts on a foam resin foundation in each construction site. Examples of the resin species include polystyrene resins, polyolefin resins, polystyrene resins, and the like. It may be an in-mold foam molded product or an extrusion foam molded product.

  Basically, any material may be used for the first and second support plates constituting the exterior support base member as long as the material is harder than the foam resin constituting the foam resin base. Can do. However, since it is left in the ground for a long period of time, it is more preferable that the material has high corrosion resistance. Examples thereof include a steel plate such as a stainless steel plate having high corrosion resistance or a reinforced plastic plate such as FRP.

  In this invention, there is no restriction | limiting in the external structure which the basic member for external structure support tends to support in the ground. Examples of the pillars such as a fence, a fence, and a car stop can be exemplified, but the present invention is not limited thereto. You may make it support the lower part of a cage | basket or a fence directly with the base member for exterior support.

  According to the present invention, while the construction is easy and low-cost construction is possible, the foundation made of foamed resin as a foundation is subject to compressive failure due to the horizontal load from the ground part of the supporting exterior. A base member for external support that can be largely avoided and can be installed on the ground in a stable state over a long period of time, and a support structure for the external base portion.

The figure which decomposes | disassembles and shows one Embodiment of the foundation member for exterior support by this invention. The figure which shows the base member for exterior support of the assembled state. The figure explaining the cross section of the support structure of the exterior base part by this invention, and the dispersion | distribution state of force. The figure explaining the two aspects of the fixed state of the base member for exterior support, and the exterior lower part. The figure explaining the further two aspects of the fixed state of the base member for exterior support, and the exterior lower part. The figure which shows other embodiment of the foundation member for exterior support by this invention. The figure explaining an example of the conventional columnar structure which has a foundation made from a foamed resin.

Hereinafter, the present invention will be described based on embodiments.
FIG. 1 and FIG. 2 show an example of a base member for exterior support according to the present invention. This exterior support base member A includes a first support plate 10, a second support plate 20, and a foamed resin base 30. As shown in FIG. 3, the base member A for external structure support is embedded in the ground S and used to support the lower part of the external structure (in this example, the support column 40). In this example, the support column 40 to be supported is a prism made of steel plate.

  The foamed resin base 30 is made of, for example, a polystyrene resin foam. The foamed resin base 30 is composed of a first rectangular parallelepiped 31 and a second rectangular parallelepiped 32 having the same shape, and a concave groove 33 having a U-shaped cross section extends from the upper end surface to the lower end surface on opposing surfaces. , 34 are formed. By integrally combining the first cuboid 31 and the second cuboid 32, a through-hole 35 (see FIG. 2) having a quadrangular cross section is formed at the center. In this example, the size of the cross section of the through hole 35 is substantially equal to the size of the cross section of the support column 40 which is a prism.

  The first support plate 10 is made of a stainless steel plate, and includes an upper end surface 36 of a rectangular parallelepiped foamed resin base 30 formed by combining the first cuboid 31 and the second cuboid 32. The flat plate 11 has the same shape and size. A rectangular opening 12 having the same shape and size as the through hole 35 is formed at a position facing the through hole 35 formed in the upper end surface 36 of the flat plate 11. A flange 13 is erected on the four sides of the opening 12, and fixing screws 14 and 15 are screwed into two opposing pieces of the flange 13.

  Similarly, the second support plate 20 is also made of a stainless steel plate, and has a flat plate 21 having the same shape and size as the lower end surface 37 of the rectangular parallelepiped foamed resin base 30. A flange 23 is erected at a position facing the through hole 35 in the lower end surface 37. Fixing screws 24 and 25 are screwed into two opposing pieces of the flange 23.

  The assembly of the base member A for external support and the integration of the base member A for external support to the lower part of the support column 40 can be performed by an arbitrary method. As an example, first, the first support plate 10 is attached to the support column 40 by passing the support column 40 through the opening 12. Next, the second support plate 20 is inserted into the through hole 35 at the lower end portion of the support column 40 into the flange 23 portion of the second support plate 20, and then the fixing screws 24 and 25 are tightened, thereby attaching the second support plate 20 to the support column 40. Secure to the bottom of the.

  The first rectangular parallelepiped 31 and the second rectangular parallelepiped 32 are placed between the first support plate 10 and the fixed second support plate 20, and the column 40 is disposed in the concave grooves 33 and 34. The foamed resin base 30 is formed by attaching the sandwiched resin. In that case, the adhesive agent is apply | coated to the surface which the 1st rectangular parallelepiped 31 and the 2nd rectangular parallelepiped 32 oppose, and both are aimed at integration. The molded foam resin base 30 is pushed down to the position of the second support plate 20 to bring the lower end surface 37 of the foam resin base 30 and the second support plate 20 into close contact with each other. Thereafter, the first support plate 10 is pushed down and brought into close contact with the upper end surface 36 of the foamed resin base 30, and the fixing screws 14 and 15 are tightened in this state to fix the first support plate 10 to the column 40.

  The assembly thus assembled is erected in the hole excavated at the construction site so that the portion of the base member A for external support is embedded in the ground S, and the hole is backfilled to the ground surface L. This completes the construction of the support structure for the exterior foundation according to the present invention. The support structure thus constructed is shown in FIG.

  In the support structure of the base portion of the support column 40 (exterior) shown in FIG. 3, when wind pressure acts on the support column 40, the support column 40 tends to tilt in the direction of the phantom line, and the moment is the same as in the case shown in FIG. Power is generated. Part of the generated moment force acts through the first support plate 10 in the direction of compressing downward substantially half the area of the upper end surface 36 of the foamed resin base 30, and the first support plate In the area opposite to 10, it acts to compress the ground upward. At the same time, a part of the generated moment force is subjected to compressive stress on the upper end surface 36 of the foamed resin base 30 at the lower end surface 37 of the foamed resin base 30 via the second support plate 20. It acts to compress the foamed resin base 30 upward in a region opposite to the region surface, and acts to compress the ground downward in a region opposite to the second support plate 20. The magnitudes of the compressive stress that the first support plate 10 applies to the upper end surface 36 of the foamed resin base 30 and the compressive stress that the second support plate 20 applies to the lower end surface 37 of the foamed resin base 30 are opposite in direction. There is almost equal. In the example shown in FIG. 3, the foamed resin base 30 is in close contact with and sandwiched between the support plate 10 and the support plate 20, and the entire exterior support base member A rotates. A part of the force also acts on the ground contact surface of the foamed resin base 30.

  As described above, the moment force generated by the inclination of the support column 40 is the contact surface between the first support plate 10 and the upper end surface 36 of the foamed resin base 30, the second support plate 20 and the foamed resin. Since it acts on the foamed resin base 30 by being dispersed on the contact surface with the lower end surface 37 of the base 30 and the ground contact surface of the foamed resin base 30, the stress is dispersed and the first support plate Compared with the case where 10 and the second support plate 20 are not provided, the compressive force that the peripheral side surface of the foamed resin base 30 receives from the ground S is reduced, and the foamed resin base 30 is compressed and broken by the acting compressive stress. The possibility can be greatly reduced.

  A base member A for supporting the exterior is formed in the lower portion of the support column 40 so that a gap is formed between the inner peripheral surface of the through hole 35 formed in the foamed resin base 30 and the lower portion of the support column 40 inserted therein. May be attached. 4 and 5 show some examples in top and side views. In the example shown in FIGS. 4 (a) and 4 (b), the support column 40 is a rectangular column, but its outer dimension is made smaller than the size of the through hole 35 formed in the foamed resin base 30. And in the example shown to Fig.4 (a), the support | pillar 40 is set to the substantially center position of the through-hole 35 with the fixing screws 14-17 (24-27) attached to the four sides of the flange 13 (23). Thus, it is fixed to the base member A for exterior support. In the example shown in FIG. 4B, long nuts 51 and 52 are inserted in a cross shape from the flange 13 (23) so as to cross the support column 40, and the other ends of the long nuts 51 and 52 are connected to the flange 13 (23). ) Are fixed to the support column 40 and the base member A for exterior support by being fixed by the fixing screws 14 (24) and 16 (26) attached to the outer structure.

  In the example shown in FIGS. 5A and 5B, the support column 40 is a cylinder, and the diameter thereof is smaller than the length of one side of the through hole 35 formed in the foamed resin base 30. In the example shown in FIG. 5A, the support column 40 is a cylindrical support column 40 by inserting a fixing long screw 53 attached to one side of the flange 13 (23) into the cylinder of the support column 40. In this state, only a part of the outer peripheral surface is fixed to the base member A for outer structure support in a state where it is in contact with the inner peripheral surface of the through hole 35 formed in the foamed resin base 30. In the example shown in FIG. 5B, as in the example shown in FIG. 4A, the support column 40 is fixed by the fixing screws 14 to 17 (24 to 27) attached to the four sides of the flange 13 (23). The outer support base member A is fixed so as to be substantially at the center position of the through hole 35.

  In this way, the support plate 10 is fixed by fixing the support column 40 to the base member A for exterior support so that the support column 40 does not contact the through-hole 35 formed in the foamed resin base 30 or only a part thereof. Even if rainwater accumulates at the joint portion of the column 30, there is an advantage that it can be discharged through the through hole 35.

  FIG. 6 shows another embodiment of the base member for exterior support according to the present invention. This external support base member A1 is different from the external support base member A described above in that the foamed resin base 30 has irregularities 38 on the surface thereof. As shown in FIG. 3, when the foamed resin base 30 forms the irregularities 38 on the surface thereof, when the exterior support base member A <b> 1 is embedded in the ground S and the column 40 is erected. By increasing the frictional resistance with the surrounding ground, it is possible to prevent buoyancy from occurring in the foamed resin base 30 due to the rise of the groundwater level and increase the frictional resistance with the surrounding ground.

  In the above example, the foamed resin base 30 is shown as a prismatic shape as a whole, but this is an example, and the outer shape may be arbitrary, such as a cylinder or a triangular prism. Further, it may have a shape like a truncated cone or a truncated pyramid that is spread upward or downward as a whole. The foamed resin base 30 may be an integrally molded product or a combination of three or more divided bodies. It may be a combination of those divided in the vertical direction. In that case, it is necessary to bond them together using an adhesive or to fix them together with a band or a sheet so that the individual divided bodies do not fall apart.

  Moreover, although the shape and magnitude | size of the 1st support plate 10 and the 2nd support plate 20 were shown as the same as the upper end surface 36 and the lower end surface 37 of the foamed resin base 30, it was different in shape and size. It may be a thing. By making the first support plate 10 and the second support plate 20 larger than the upper end surface 36 and the lower end surface 37 of the foamed resin base 30, a more stable support structure of the exterior base portion can be obtained. .

  Moreover, although what has no opening was shown as the 2nd support plate 20, you may use what formed the opening which the support | pillar 40 passes similarly to the 1st support plate 10. FIG.

A ... Foundation member for exterior support,
10 ... 1st support plate,
20 ... the second support plate,
11, 21 ... flat plate,
12, 22 ... opening,
13, 23 ... Flange,
14, 15, 24, 25 ... fixing screws,
30 ... Foundation made of foamed resin,
31 ... the first rectangular parallelepiped,
32. Second rectangular parallelepiped,
33, 34 ... concave groove,
35 ... through hole,
36 ... the upper end surface of the foam resin base,
37 ... lower end surface of the foam resin base,
40 ... Exterior (post).

Claims (5)

A base member for exterior support having a foam resin base as a part of the support member,
A foamed resin base formed with a through-hole into which the lower part of the outer structure embedded in the ground enters from one end surface to the other end surface;
An opening made of a material harder than the foamed resin constituting the foamed resin base and having an opening through which the lower part of the outer structure can pass and a fixing means to the lower part of the outer structure is disposed on one end surface of the base of the foamed resin. 1 support plate;
A second support plate made of a material harder than the foamed resin constituting the foamed resin base and provided with a fixing means to the lower part of the outer structure and disposed on the other end surface of the foamed resin base;
A base member for exterior support, comprising:   The foundation member for exterior support according to claim 1, wherein the second support plate has an opening through which the exterior lower portion can pass.   The exterior support base member according to claim 1 or 2, wherein the foamed resin base is composed of two or more divided bodies divided in the axial direction of the through hole.   The foundation member for exterior support according to any one of claims 1 to 3, wherein the foamed resin base is formed with irregularities on an outer surface excluding both end surfaces.   The base member for exterior support according to any one of claims 1 to 4, wherein the first support plate is in close contact with the upper end surface of the foamed resin base, and the second support plate is in close contact with the lower end surface. Embedded in the ground in a state where the lower part of the exterior enters into the through-hole formed in the foamed resin base of the embedded foundation support base member, and the first support A support structure for a foundation base portion, which is integrally fixed to a foundation support base member by fixing means formed on the plate and the second support plate.

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