JP2018154384A - Concrete-made housing and manufacturing method of concrete-made housing - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a concrete-made housing in which a construction is simple and economical, installation is easy, and installation time is short.SOLUTION: A concrete-made housing is formed through constituting integrally a housing lower part 10, a housing upper part 20, and a sheet 30. The sheet 30 is embedded in a housing lower part upper end surface 15 and a housing upper part lower surface 21. The lower surface periphery part 21a of the housing upper part and the upper end surface periphery part 15a of the housing lower part are formed as continuous.SELECTED DRAWING: Figure 1

Description

    The present invention relates to a concrete frame. In particular, the present invention relates to a concrete case having a hollow interior and being vertically integrated.

  Generally, there are few concrete structures (products) with a box-type structure (casing). One side of many of the concrete products is released (for example, Patent Document 1).

  By the way, in recent years, a concrete product having a box-type structure is sometimes manufactured and used to store radioactive contaminants and the like.

  In general, a concrete casing is manufactured separately from a lower structure having an opening and an upper structure as a lid. In order to integrate the upper structure and the lower structure, unevenness is provided, or metal parts (bolts) are used.

  When the upper structure and the lower structure are separately manufactured and then integrated with each other, a gap is generated, airtightness is poor, and moisture and gas leakage may occur depending on the contents. There is also a risk of intrusion from the outside.

Japanese Patent Laid-Open No. 08-074309

  The inventor of the present application tried to manufacture a concrete frame without a gap by integrally constructing the upper structure and the lower structure.

  Install the outer formwork for the outer wall and the inner formwork for the inner wall, drive concrete into the space formed by the formwork, form the lower structure, and install the lid bottom formwork on the upper surface of the inner formwork, Can be integrated by forming an upper structure (lid).

  However, in the above case, the inner formwork is buried and it is uneconomical, the inner cavity becomes narrower by the amount of innerframe filling, the structure of the inner formwork becomes complicated, and the workability for installation of the inner formwork is reduced However, there is a problem that a long construction time is required because the lid bottom formwork is installed after the bottom concrete of the lower structure is hardened.

  An object of the present invention is to provide a concrete frame that is simple and economical, easy to construct, and has a short construction time.

  This invention which solves the said subject is a concrete frame. The concrete case is composed of a bottom part having a bottom part, a side part, an internal cavity, and an upper opening, a case upper part provided at an upper part of the case lower part, and a sheet provided between the case lower part and the case upper part. Is provided. The lower surface peripheral part of the said housing upper part and the upper end surface peripheral part of the said housing lower part are formed continuously.

  Thereby, the continuity and unity between the lower part of the casing and the upper part of the casing are ensured.

  In the present invention, preferably, the upper part of the casing and the lower part of the casing include a cement composition, and the cement composition is a fast-hardening cement composition.

  Thereby, construction time becomes short.

  In the present invention, preferably, the upper part of the casing and the lower part of the casing include a cement composition, and the cement composition is a polymer cement cement composition.

  Thereby, the adhesiveness of a housing lower part and a housing upper part and the adhesiveness of a sheet | seat and a housing lower part and a housing upper part are ensured.

  In the present invention, preferably, the sheet is a continuous fiber sheet.

  In the present invention, preferably, the continuous fiber sheet is carbon fiber.

  In the present invention, preferably, the continuous fiber sheet is a continuous fiber sheet impregnated with a resin.

  In the present invention, preferably, the sheet is formed by laminating a plurality of continuous fiber sheets impregnated with resin orthogonally.

  Thereby, the sheet functions as a bottom mold at the time of manufacture and as a reinforcing material at the time of product.

  In the present invention, it is preferable to further include a lattice-shaped reinforcing material embedded in the upper part of the casing.

  This invention which solves the said subject is a manufacturing method of a concrete frame. A step of installing an outer mold and an inner mold, a step of filling a space formed by the outer mold and the inner mold with a cement composition to form a lower part of the housing, and a step of removing the inner mold, A step of installing a sheet leaving a peripheral part on the upper end surface of the lower part of the casing, and a space formed by the peripheral part of the upper end surface of the outer frame, the sheet and the lower part of the casing are filled with a cement composition to form an upper part of the casing And a step of removing the outer formwork.

  In the present invention, the configuration is simple and economical. Construction is easy and construction time is short.

It is a disassembled perspective view of the concrete frame which concerns on this embodiment. It is a partial section perspective view of the concrete frame concerning this embodiment. It is an example of the sheet | seat which concerns on this embodiment. It is each process of the manufacturing method of the concrete frame which concerns on this embodiment (frame lower part formation). It is each process of the manufacturing method of the concrete frame which concerns on this embodiment (frame upper part formation).

~Constitution~
The concrete frame according to this embodiment will be described. FIG. 1 is an exploded perspective view. FIG. 2 is a partial cross-sectional perspective view.

  The concrete casing is formed by integrating the casing lower part 10, the casing upper part 20, and the sheet 30.

  The housing lower part 10 has a bottom part 11 and a side part 12. When the side surface portion 12 is erected from the peripheral edge portion of the bottom surface portion 11, an internal cavity 13, an upper opening 14, and a housing lower upper end surface 15 are formed. The contents are installed in the internal cavity 13.

  The housing upper part 20 has a flat plate shape and is provided on the upper part of the housing lower part 10 so as to cover the upper opening 14.

  The seat 30 is provided between the housing lower portion 10 and the housing upper portion 20 and is integrated with the housing lower upper end surface 15 and the housing upper lower surface 21.

  The size of the seat 30 is slightly larger than the outer periphery of the upper opening 14 and slightly smaller than the outer periphery of the lower body upper end surface 15. As a result, the peripheral edge portion 15 a of the housing lower upper end surface 15 is not in contact with the sheet 30.

  The lower surface peripheral part 21a of the upper part of the housing and the upper peripheral surface peripheral part 15a of the lower part of the housing are formed continuously.

  Since the housing lower portion 10 and the housing upper portion 20 are continuously integrated without a boundary, the sheet 30 is embedded in both the housing lower portion 10 and the housing upper portion 20.

  The casing lower part 10 and the casing upper part 20 are concrete (or mortar). That is, it is formed by a cement composition.

  As the cement, Portland cement may be used, but it is preferable to use fast-setting cement, polymer cement, or fast-setting polymer cement.

  By using the polymer cement, the bending strength is excellent, and the adhesiveness with the sheet 30 and the adhesiveness between the casing lower part 10 and the casing upper part 20 are excellent (see the manufacturing method described later). Further, since the drying shrinkage is small, it is difficult for cracks to occur and the airtightness inside the housing can be maintained. Furthermore, since the material permeability (moisture, salt content) and freeze-thaw resistance are high, the durability is excellent. As the polymer, various polymers for cement can be used, and a styrene butadiene rubber-based polymer is particularly preferable.

  By using the fast-curing cement, the integration work of the housing can be completed quickly. Rather than manufacturing at a product factory, manufacturing operations can be performed at the installation site (see manufacturing method described later).

  Although it will not specifically limit if the sheet | seat 30 has predetermined | prescribed rigidity, From the point that construction is easy, it is preferable that it is a continuous fiber sheet. The continuous fiber sheet is a sheet made of continuous fibers such as carbon fibers, glass fibers, organic fibers such as aramid and vinylon. In particular, a carbon fiber sheet excellent in tensile strength and rigidity is preferred. Moreover, the continuous fiber sheet manufactured by the biaxial or more multiaxial besides the continuous fiber sheet which has uniaxial directionality may be sufficient. Furthermore, a continuous fiber sheet impregnated with a resin such as an epoxy resin or a methacrylic resin may be used. In particular, a continuous fiber sheet of carbon fibers impregnated and cured with an epoxy resin as a matrix resin is preferable.

  In the sheet 30 of the present embodiment, as an example, a plurality of (for example, two or four) continuous fiber sheets 30A and 30B impregnated with resin are stacked orthogonally to form a single flat plate. Further, a resin may be further applied.

  The sheet 30 of the present embodiment is excellent in adhesion with the casing upper lower surface 21 and adhesion with the casing lower upper end surface 15 due to the unevenness of the continuous fiber sheet impregnated with resin.

  FIG. 3 shows an example of a continuous fiber sheet impregnated with resin and a detailed enlarged view.

  As the continuous fiber sheet impregnated with resin, a reinforced fiber sheet in which continuous fibers such as carbon fibers are impregnated with epoxy resin and the like, cured into a rod shape, arranged in one direction, and processed into a comb shape is commercially available (for example, “ Strand sheet "(registered trademark)) and these can be used.

  Generally, it is used for repair and reinforcement by bonding to the surface of an existing concrete structure using a room temperature curable adhesive such as epoxy resin.

  The strand sheet is freely deformable depending on the interdigital shape, and is excellent in portability. Moreover, it can respond to any concrete structure surface shape.

~ Modification ~
When the strength is required for the housing upper portion 20, a lattice-like strong member 25 may be appropriately embedded in the housing upper portion 20 (see FIG. 2). The lattice reinforcing material is not particularly limited as long as it has a predetermined rigidity, but a lattice continuous fiber reinforcing material is preferable. The lattice-like continuous fiber reinforcing material 25 is obtained by impregnating continuous fibers with an epoxy resin or the like, curing it in a rod shape, arranging it in two directions, and processing it into a lattice shape.

  Generally, the casing is rectangular, but it may be cylindrical.

~Production method~
The manufacturing method of the concrete frame which concerns on this embodiment is demonstrated. FIG. 4 is a diagram for explaining a process (process A → D) up to formation of the lower part of the housing. FIG. 5 is a diagram illustrating a process (process E → H) from the formation of the lower part of the casing to the formation of the upper part of the casing.

  The method for producing a concrete casing according to the present embodiment is characterized by continuously integrating the lower part of the casing 10 and the upper part of the casing 20 using a fast-hardening polymer cement concrete (or mortar) and a continuous fiber sheet. . An example will be described below.

  First, the outer mold frame 41 up to a height slightly higher than the height of the top of the chassis is installed. The upper part is an opening (step A).

  The inner mold 42 is installed in the outer mold 41 (process B). The inner mold frame 42 corresponds to the inner cavity 13. For example, the inner mold frame 42 is formed of vinyl chloride or expanded polystyrene. The bottom surface of the outer mold 41 is suspended and supported by a suspension support portion 43 so that the bottom surface can be cast. The suspension support part 43 also prevents the inner formwork 42 from floating when the concrete is placed.

  The space formed by the outer mold 41 and the inner mold 42 is filled with the fast-hardening polymer cement concrete up to the height of the top 10 of the lower part of the casing (step C). The lower body part 10 is formed by concrete hardening.

  The fast-curing polymer cement concrete hardens in 2 to 3 hours, and the inner mold frame 42 can be removed (step D). Specifically, the inner mold frame 42 is pulled upward via the suspension support portion 43.

  Thereby, the internal cavity 13 is formed. The contents are placed in the internal cavity 13.

  At the same time, an upper opening 14 and a housing lower upper end surface 15 are formed.

  In addition, after placing the bottom surface portion 11, the inner frame 42 may be installed, and the side surface portion 12 may be disposed to form the lower body portion 10.

  The sheet 30 is created so as to be slightly larger than the outer periphery of the upper opening 14 and slightly smaller than the outer periphery of the upper lower end surface 15 of the housing.

  An adhesive (resin) is applied to the region 15b other than the peripheral edge portion 15a of the casing lower upper end surface 15 (step E). At this time, a sufficient bonding area is secured between the lower surface peripheral portion 21a at the upper portion of the casing and the peripheral portion 15a at the upper end surface at the lower portion of the casing. For example, the peripheral edge 15a width and the region 15b width are preferably about 3: 7 to 7: 3.

  The sheet 30 is installed in the region 15b so as to close the upper opening 14 (step F). Further, an adhesive is applied to the upper surface of the sheet 30.

  The space formed by the outer mold frame 41, the sheet 30, and the peripheral edge portion 15a is filled with the fast-hardening polymer cement concrete up to the height of the top 20 of the casing (step G). That is, the sheet 30 is used as a bottom mold. When strength is required for the housing upper part 20, a lattice-like continuous fiber reinforcing material 25 is embedded as appropriate.

  A housing upper part 20 is formed by concrete hardening. At this time, by placing polymer cement concrete within a predetermined time, the lower surface peripheral edge portion 21a and the upper end surface peripheral edge portion 15a adhere well.

  The fast-curing polymer cement concrete hardens in 2 to 3 hours, and the outer mold 41 can be removed (step H).

  Depending on the size of the product, it is possible to produce an integrated housing in a few hours.

~effect~
In the production of the concrete casing according to the present embodiment, the lower surface peripheral edge portion 21a and the upper end surface peripheral edge portion 15a are continuously formed. Thereby, the continuity and integrity of the housing lower part 10 and the housing upper part 20 are ensured.

  In the concrete casing according to this embodiment, the casing lower part 10 and the casing upper part 20 are continuously integrated. For this reason, after manufacturing an upper part and a lower part separately, compared with the prior art which integrates both, airtightness is high.

  In the production of the concrete casing according to this embodiment, the sheet 30 is used as a bottom mold. Installation of the sheet 30 is easy and construction is easy. As a result, the construction time is short.

  In the concrete casing according to this embodiment, the sheet 30 is integrated (embedded) with the casing lower part 10 and the casing upper part 20. That is, the sheet 30 bears a part of the tensile force acting on the housing upper lower surface 21. That is, since it functions as a structure, even if it is buried, it is economical and economical.

  That is, the sheet 30 functions as a bottom mold at the time of manufacture and as a reinforcing material at the time of product.

  In the production of the concrete casing according to the present embodiment, the inner mold 42 is easy to install and easy to install. As a result, the construction time is short. Further, the inner mold 42 is not buried, is not wasted, and is economical. Further, since the inner mold 42 is not buried, the inner cavity 13 can be widened.

  As described above, the concrete frame according to the present embodiment is simple in configuration and economical. Moreover, construction is easy and construction time is short.

DESCRIPTION OF SYMBOLS 10 Housing | casing lower part 11 Bottom part 12 Side part 13 Internal cavity 14 Upper opening 15 Housing | casing lower upper end surface 20 Housing | casing upper part 21 Housing | casing upper lower surface 25 Grid-shaped reinforcement 30 Sheet | seat 41 Outer frame 42 Inner mold frame 43 Suspension support part

Claims (9)

A lower part of the housing having a bottom part, a side part, an internal cavity and an upper opening;
An upper part of the casing provided at an upper part of the lower part of the casing;
A sheet provided between the lower part of the casing and the upper part of the casing;
A concrete casing, wherein the lower peripheral edge of the upper part of the casing and the peripheral edge of the upper end surface of the lower part of the casing are formed continuously. The upper part of the housing and the lower part of the housing contain a cement composition,
The concrete frame according to claim 1, wherein the cement composition is a fast-curing cement composition. The upper part of the housing and the lower part of the housing contain a cement composition,
The concrete frame according to claim 1 or 2, wherein the cement composition is a polymer cement cement composition. The concrete sheet according to any one of claims 1 to 3, wherein the sheet is a continuous fiber sheet. The said continuous fiber sheet is carbon fiber. The concrete frame of Claim 4 characterized by the above-mentioned. The concrete casing according to claim 4 or 5, wherein the continuous fiber sheet is a continuous fiber sheet impregnated with a resin. The concrete sheet body according to any one of claims 1 to 6, wherein the sheet is formed by laminating a plurality of continuous fiber sheets impregnated with resin orthogonally. The concrete frame according to any one of claims 1 to 7, further comprising a lattice-shaped reinforcing material embedded in the upper part of the frame. Installing the outer and inner molds;
Filling the space formed by the outer mold and the inner mold with a cement composition, and forming a lower part of the housing;
Removing the inner mold,
A step of installing a sheet leaving a peripheral edge at the upper end surface of the lower part of the housing;
Filling the cement composition in the space formed by the outer peripheral edge of the outer mold, the sheet and the lower part of the casing, and forming the upper part of the casing;
Removing the outer mold,
A method for producing a concrete frame, comprising: