JP2012017572A - Stress distribution block - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide stress distribution blocks which construct a civil engineering structure by being arranged at a construction site and which can be constructed more easily than conventional ones.SOLUTION: Stress distribution blocks 100 are substantially in a rectangular parallelepiped shape and construct a civil engineering structure by being arranged at a construction site. The stress distribution blocks 100 comprise a resin foam portion 1 and a concrete portion 2 fixed to the resin foam portion 1. The concrete portion 2 is fixed to the resin foam portion 1 so that the resin foam portion 1 and the concrete portion 2 can be integrally transported to the construction site.

Description

  The present invention relates to a stress distribution block, and more particularly, to a stress distribution block having a substantially rectangular parallelepiped shape and constituting a civil engineering structure by being arranged in a plurality at a construction site.

  A construction method using a foamed resin block made of lightweight foamed polystyrene as a civil engineering material is conventionally known as an “EPS (Expanded Poly-Styrol) construction method”. This foamed polystyrene material can exhibit the merit of being lightweight when providing a civil engineering structure on soft ground. Moreover, since the said material has self-supporting property, it is possible to reduce the man-hour of retaining wall construction and earth retaining work significantly. As a result, according to the EPS method, it is possible to shorten the construction period (early recovery at the time of a disaster), reduce the construction cost, and the like.

  In addition, as a prior art regarding an EPS construction method, the thing of the following patent documents 1 and 2 etc. are mentioned, for example.

JP-A-5-33348 JP 2007-308882 A

  In the EPS method, it is necessary to provide a concrete slab for dispersing wheel loads on the foamed resin block. When the EPS construction method is adopted, the construction period can be shortened and the construction cost can be reduced as described above. However, in order to effectively realize these, it is necessary to efficiently perform the above-described process of providing the concrete slab. is there.

  In the invention described in Patent Document 1, since concrete is cast on site, it cannot sufficiently meet the shortening of the construction period required in an emergency such as disaster recovery. On the other hand, in the invention described in the cited document 2, it is shown that the concrete floor slab is constructed at the factory (that is, precast). However, when the concrete floor slab is precast, there is a gap between the foam resin block. Some measures may be required to stop it.

  This invention is made | formed in view of the above problems, The objective of this invention is a stress distribution block which comprises a civil engineering structure by arranging two or more in a construction site, Comprising: The construction is conventional. It is to provide something that is easier than one.

  The stress distribution block according to the present invention has a substantially rectangular parallelepiped shape, and is a stress distribution block that constitutes a civil engineering structure by being arranged in plural at a construction site, and the foam resin portion and the foam resin portion fixed to the foam resin portion A plate-like portion harder than the foamed resin portion is provided, and the plate-like portion is fixed to the foamed resin portion so that the foamed resin portion and the plate-like portion can be integrally conveyed to the construction site.

  In one embodiment, the plurality of stress distribution blocks are fastened by a fastening fitting at a construction site, and the plate-like portion is formed while securing the installation position of the fastening fitting.

  In a typical example, in the stress distribution block, the plate-like portion is provided on the surface of the foamed resin portion, but the plate-like portion may be provided so as to be sandwiched between the foamed resin portions.

  According to the present invention, it is possible to obtain a stress distribution block that is easier to construct than the conventional one.

It is a figure which shows an example of the civil engineering structure by an EPS construction method. It is a figure which shows the other example of the civil engineering structure by an EPS construction method. It is a figure which shows an example of the metal fitting for fixing foaming resin boxes. It is a figure which shows the other example of the metal fitting for fixing foaming resin boxes. It is a figure which shows the stress distribution block which concerns on one embodiment of this invention. It is a figure which shows an example of arrangement | positioning of the stress distribution block shown in FIG. It is a figure which shows the other example of arrangement | positioning of the stress distribution block shown in FIG. It is a figure which shows the application example of the stress distribution block which concerns on one embodiment of this invention. It is a figure which shows arrangement | positioning of the application example of the stress distribution block which concerns on one embodiment of this invention.

  Embodiments of the present invention will be described below. Note that the same or corresponding portions are denoted by the same reference numerals, and the description thereof may not be repeated.

  Note that in the embodiments described below, when referring to the number, amount, and the like, the scope of the present invention is not necessarily limited to the number, amount, and the like unless otherwise specified. In the following embodiments, each component is not necessarily essential for the present invention unless otherwise specified.

  FIG. 1 is a diagram illustrating an example of a civil engineering structure including a stress distribution block according to the present embodiment. As shown in FIG. 1, this civil engineering structure is a banking structure formed on the ground, and includes a foamed resin block portion 10, a concrete floor slab portion 20 provided on the foamed resin block portion 10, and concrete. A roadbed 30 provided on the floor slab portion 20 and a pavement 40 provided on the roadbed 30 are included. Embankment material 50 is provided on both sides of the foamed resin block portion 10, the concrete floor slab portion 20, the roadbed 30 and the pavement 40.

  Each of the foamed resin block portions 10 has a rectangular parallelepiped shape. The foam resin block portion 10 is a lightweight portion formed of foamed polystyrene. Thus, since the foamed resin block part 10 is very lightweight, when forming a banking structure like FIG. 1 on a soft ground, ground improvement can be abbreviate | omitted or simplified. It is also possible to shorten the construction period. Note that the plurality of foamed resin block portions 10 are fixed to each other by a fastening fitting 10A.

  FIG. 2 is a diagram showing another example of the civil engineering structure by the EPS method. The structure shown in FIG. 2 uses, for example, an EPS method for construction to widen a road facing a slope. Therefore, the side surfaces of the foamed resin block portion 10 stand vertically at the end portions of the concrete floor slab portion 20, the roadbed 30, and the pavement 40. In addition, foundation concrete 70 is provided at the bottom of the foamed resin block 10 that is stacked in multiple layers.

  A protective wall made of concrete or the like is provided on the side surface of the foamed resin block portion 10 that stands vertically.

  Next, the structure of the fastening hardware 10A will be described with reference to FIGS. As shown in FIGS. 3 and 4, the fastening fitting 10A includes a flat surface portion 10A1 and a claw portion 10A2. The planar portion 10A1 is a portion provided along the main surface of the foamed resin block portion 10, and the claw portion 10A2 protruding from the planar portion 10A1 is a portion inserted into the foamed resin block portion 10. By inserting the claw portions 10A2 provided on one tight fitting 10A into the plurality of foamed resin block portions 10, the plurality of foamed resin block portions 10 are fixed to each other.

  3 has a claw portion 10A2 on both upper and lower sides, and the metal fitting 10B shown in FIG. 4 has a claw portion 10A2 only on one side (the upper side in FIG. 4). Typically, the metal fitting shown in FIG. 3 is used at the joint location located between the plurality of layers of the foamed resin block 10, and the metal fitting shown in FIG. 4 is used at the uppermost joint location.

  Next, the function of the concrete floor slab portion 20 will be described. As shown in FIG. 1, the wheel load acting on the pavement 40 reaches the concrete floor slab 20 in a state of being distributed according to the thickness of the pavement 40 and the roadbed 30. The concrete floor slab portion 20 transmits a load to the foamed resin block portion 10 in a more uniform state. Thereby, the deformation | transformation of the foamed resin block part 10 by a stress concentration arising in a part of the foamed resin block part 10 is suppressed.

  One of the major advantages of the EPS method is the shortening of the construction period. Thereby, effects, such as early restoration at the time of a disaster and reduction of a construction cost, can be acquired. On the other hand, in order to give the concrete floor slab portion 20 a predetermined strength, a period for curing the concrete is necessary, and when the concrete is cast on the construction site, this curing period shortens the construction period. There is a concern that it will interfere. In particular, when an emergency is required, such as during a disaster recovery, shortening the construction period may be a top priority issue.

  On the other hand, in this embodiment, the concrete floor slab portion 20 is not composed of on-site concrete, but is formed in advance at the factory and then transported to the construction site. The construction period can be further shortened. Specifically, the foamed resin block portion 10 and the concrete floor slab portion 20 are preliminarily charged into one block (hereinafter referred to as “stress distribution block”) and then transported to the construction site. .

  The structure of the stress distribution block according to this embodiment will be described below. As shown in FIG. 5, the stress distribution block 100 according to the present embodiment includes a foamed resin portion 1 and a concrete portion 2. The foamed resin portion 1 constitutes the above-described foamed resin block portion 10, and the concrete portion 2 constitutes the above-described concrete floor slab portion 20.

  A stress distribution block 100 shown in FIG. 5A is the most standard example in which the concrete portion 2 is formed on the upper surface of the foamed resin portion 1. The stress distribution block 100 shown in FIG. 5 (B) has a concrete portion 2 formed on the lower surface of the foamed resin portion 1, and is a reverse use of the one shown in FIG. 5 (A).

  Further, as an example other than FIGS. 5A and 5B, stress distribution blocks as shown in FIGS. 5C and 5D may be considered. A stress distribution block 100 shown in FIG. 5C is obtained by forming the foamed resin portion 1 on both sides of the concrete portion 2, and the stress distribution block 100 shown in FIG. 5D is formed on both sides of the foamed resin portion 1. A concrete portion 2 is formed. In an actual construction site, a civil engineering structure is configured by appropriately combining the stress distribution blocks 100 shown in FIGS.

  The stress distribution block 100 shown in FIG. 5A is suitable for further distributing wheel loads distributed through, for example, pavement and roadbed. The stress distribution block 100 shown in FIG. 5 (B) is suitable for evenly distributing the load on the block installation surface when, for example, the block installation surface is soft ground or uneven ground. Yes.

  Moreover, since the stress distribution block 100 shown in FIG. 5C has the concrete portion 2 disposed in the middle portion, the blocks can be easily integrated with each other by the fastening hardware 10A. The stress distribution block 100 shown in FIG. 5D is suitable when the upper load or concentrated load becomes large.

  The foamed resin portion 1 is formed by molding foamed polystyrene into a predetermined shape at a factory. The foamed resin portion 1 may be formed by an in-mold foaming method or an extrusion foaming method.

  The concrete part 2 is formed on the molded foamed resin part 1. Since the adhesion between polystyrene foam and concrete is good, it can withstand horizontal loads during earthquakes. Therefore, it is suppressed that the concrete floor slab 20 “displaces” with respect to the foamed resin block 10 at the time of the earthquake.

  In addition, the stress distribution block 100 including the foamed resin portion 1 and the concrete portion 2 is conveyed to the construction site in a state of being molded into a predetermined shape. Therefore, construction at the construction site is easy. In addition, since the stress dispersion | distribution block 100 contains the concrete part 2, depending on a magnitude | size, it may be difficult to carry only by human power. Therefore, the stress distribution block 100 is provided with a lifting metal fitting.

  Next, arrangement examples of the stress distribution blocks shown in FIGS. 5A to 5D will be described with reference to FIGS.

  As shown in FIG. 6, when a banking structure is provided on soft ground, the uppermost stress distribution block 100 shown in FIG. 5A (with the concrete portion 2 formed on the upper side) is used. As the lowermost stress distribution block 100, the one shown in FIG. 5B (the one in which the concrete portion 2 is formed on the lower side) is typically used.

  In the example of FIG. 6, the concrete load slab portion 20 is formed on the upper surface of the foamed resin block portion 10 by arranging the block of FIG. 5A on the uppermost side, and the wheel load transmitted to the foamed resin block portion. Can be dispersed. Moreover, the concrete floor slab part 20 can be formed in the lower surface of the foamed resin block part 10, and the load transmitted to the ground can be disperse | distributed by arrange | positioning the block of FIG. 5 (B) in the lowest side. The foamed resin portions 1 laminated in a plurality of layers are fixed by a fastening fitting 10A.

  Moreover, as shown in FIG. 7, when performing widening construction on a slope, as the uppermost stress dispersion block 100, the one shown in FIG. 5 (A) (with the concrete portion 2 formed on the upper side) is used. As the lowermost stress distribution block 100, the one shown in FIG. 5D (with the concrete portions 2 formed on both sides) is used, and as the stress distribution block 100 in the middle portion, FIG. It is typical to use those shown in () in which the concrete part 2 is formed in the middle).

  In the example of FIG. 7, the concrete floor slab portion 20 is formed on the upper surface of the foamed resin block portion 10 by arranging the block of FIG. 5A on the uppermost side, and the wheel load transmitted to the foamed resin block portion. Can be dispersed. Further, by disposing the block of FIG. 5C in the intermediate portion, it is possible to disperse the stress in the intermediate portion and to easily fix the upper and lower stress distribution blocks 100 to each other. Furthermore, by disposing the block of FIG. 5D on the lowermost side, it is possible to effectively distribute the stress at the lowest stage where stress concentration is likely to occur due to the upper load acting. The foamed resin portions 1 laminated in a plurality of layers are fixed by the fastening hardware 10A as in the example of FIG.

  8 and 9 are diagrams showing application examples of the stress distribution block. 8 and 9, in this application example, a hollow portion 2A is provided in a part of the concrete portion 2, and the foamed resin portion 1 is exposed on the hollow portion 2A. That is, in this application example, the concrete portion 2 is formed so as to ensure the installation position of the fastening fitting 10A for fastening the plurality of stress dispersion blocks 100 at the construction site. By doing in this way, fixation with 10 A of fastening metal fittings is possible also on the surface in which the concrete part 2 was formed.

  The above contents are summarized as follows. That is, the stress distribution block 100 according to the present embodiment has a substantially rectangular parallelepiped shape, and constitutes a civil engineering structure by being arranged in a plurality at the construction site. The stress distribution block 100 includes a foamed resin portion 1 and a concrete portion 2 fixed to the foamed resin portion 1. The concrete portion 2 is fixed to the foamed resin portion 1 so that the foamed resin portion 1 and the concrete portion 2 can be integrally conveyed to the construction site.

  In addition, it can replace with the concrete part 2 mentioned above, and can also use a steel plate and a resin plate. In short, if it is harder than the foamed resin portion 1, it is possible to exhibit the above-described stress dispersion function by appropriately adjusting the thickness and the like.

  Although the embodiments of the present invention have been described above, the embodiments disclosed this time should be considered as illustrative in all points and not restrictive. The scope of the present invention is defined by the terms of the claims, and is intended to include any modifications within the scope and meaning equivalent to the terms of the claims.

  DESCRIPTION OF SYMBOLS 1 Foam resin part, 2 concrete part, 10 foam resin block, 20 concrete floor slab, 30 roadbed, 40 pavement, 50 embankment material, 60 back slope anchor, 70 foundation concrete, 80 support | pillar, 81 anchor, 100 stress distribution block.

Claims (1)

A stress distribution block that has a substantially rectangular parallelepiped shape and constitutes a civil engineering structure by being arranged in a plurality at the construction site,
A foamed resin part;
A plate-like portion harder than the foamed resin portion fixed to the foamed resin portion,
A stress distribution block in which the plate-like portion is fixed to the foamed resin portion so that the foamed resin portion and the plate-like portion can be integrally conveyed to the construction site.

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