JP2016069939A - Substructure using insulation formwork, construction method, and pressure-resistant slab type grid post-foundation forming method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a substructure using insulation formwork, the substructure that eliminates concerns such as damages of the insulation formwork, furthermore can sufficiently secure a concrete placement volume, and thereby can secure the reinforced concrete section performance and retain high construction quality and thermal insulation performance.SOLUTION: Insulation formwork 10 has a pair of formwork plates 11 and 12 made of synthetic resin foam and a metallic connecting member 13 for connecting both formwork plates while being spaced at regular intervals by both ends buried and fixed in the formwork plates, respectively. The insulation formwork is installed in a construction place of an outer circumference base beam 2. An opening part 20 is secured in a height of a pressure-resistant slab 3 and concrete is placed, and thereby a substructure 1 using the insulation formwork is constructed in which the outer circumference base beam 2 and the pressure-resistant slab 3 are integrated.SELECTED DRAWING: Figure 7

Description

  TECHNICAL FIELD The present invention relates to a foundation structure, a construction method, and a pressure plate type grid post foundation forming method using a heat insulation form frame in which an outer peripheral foundation beam is constructed using a heat insulation form having heat insulation performance as a discarded form frame.

  Patent Document 1 describes an example of a heat insulating formwork (also referred to as a formwork block) embedded in a foundation of a house and an example of a method for constructing a foundation beam using the heat insulating formwork. The heat insulation form described in Patent Document 1 is a resin-integrated heat insulation form formed by connecting a pair of form plates made of a synthetic resin foam arranged in parallel with a predetermined interval at a connecting portion.

  By the way, when constructing a foundation beam of a house using such a heat-insulating formwork, a chemical for termite control may be injected, but there is a concern that this chemical weakens the bonding force between the resins.

Japanese Patent No. 3730347

  For this reason, there exists a possibility that the junction part of the formwork board and connection part which are most loaded at the time of construction may be damaged, and when a heat insulation formwork was damaged, construction quality may deteriorate.

  In addition, since the connecting portion of the heat-insulated mold integrally formed with resin has to have a large cross-sectional dimension in order to ensure the connecting strength, the concrete placement volume is reduced accordingly, and the concrete strength is reduced. There was a fear.

  In consideration of the above circumstances, the present invention has no concern that the heat insulation formwork may be damaged even if it is manufactured by injecting chemicals for termite control, and can sufficiently secure the concrete placement volume, An object of the present invention is to provide a foundation structure, construction method, and pressure plate type grid post foundation formation method using a heat insulating formwork capable of ensuring reinforced concrete cross-sectional performance and maintaining high construction quality and heat insulation performance.

  In order to solve the above-mentioned problem, the basic structure using the heat insulating form of the invention of claim 1 is a pair of synthetic resins which are arranged in parallel with each other at a predetermined interval and between which a concrete is placed. A foam-made form plate, and a metal connecting member for connecting the two form-plates in a state of being spaced apart by both ends being embedded and fixed in the pair of form-plates, respectively. Is used as a discarded formwork of the outer peripheral foundation beam, and the position corresponding to the height of the pressure plate of the formwork plate on the inner peripheral side of the heat-insulated formwork used as the discarded formwork In addition, an opening communicating with the pressure plate concrete placement space on the upper side of the pressure plate lower formwork is secured, and reinforcing bars for outer peripheral foundation beams are arranged inside the heat insulation formwork, and the upper side of the pressure plate lower formwork A pressure-resistant plate rebar is disposed in the opening, and further through the opening, the pressure-resistant plate mold Reinforcing bars are arranged from the upper side to the inside of the heat insulation formwork, and then, concrete is placed in the internal space of the heat insulation formwork and the pressure plate concrete placement space above the pressure plate lower formwork. Thus, the outer peripheral foundation beam and the pressure plate are constructed integrally.

  According to the foundation structure using the heat insulation formwork of the invention of claim 1, the outer peripheral foundation beam for constructing the heat insulation formwork as a discarded formwork and the pressure-resistant plate once through the opening provided in the heat insulation formwork. Since it can be formed integrally by placing concrete in this manner, construction can be facilitated. In addition, since the pressure-resistant plate is constructed at the height of the opening secured in the formwork plate on the inner circumference side of the heat-insulated formwork, An underfloor space can be secured between the plate and the floor.

  In addition, in the heat insulation formwork used as the discarded formwork of the outer peripheral foundation beam in the foundation structure using this heat insulation formwork, the connecting member for connecting a pair of synthetic resin foam formplates is made of metal. Therefore, sufficient connection strength can be exhibited with a small cross-sectional area. Moreover, since the both ends of the connecting member are embedded and fixed in the mold plate made of the synthetic resin foam, the bonding strength between the mold plate and the connecting member can be sufficiently exhibited. Therefore, both mold frame plates can be reliably held at regular intervals, there is no risk of damage during construction, and construction quality can be improved. Further, since the metal connecting member has a small cross-sectional area from the viewpoint of strength, it is possible to secure a large concrete placement volume and to construct an outer peripheral foundation beam having high reinforced concrete strength. As a result, a simple construction method for a foundation structure using a heat-insulated formwork in which the outer peripheral foundation beam and the pressure plate are integrated, especially a foundation structure using a heat-insulated formwork with high rigidity against horizontal force and uneven settlement. Can be obtained without cost.

  The foundation structure using the heat insulation formwork of the invention of claim 2 is the heat insulation foundation structure according to claim 1, wherein a grid post is installed after installation of the pressure plate at a predetermined position on the upper surface of the pressure plate. It is characterized by a columnar body for boulders.

  According to the foundation structure using the heat-insulating form of the invention of claim 2, since the boulder pillars as the grid posts are installed on the upper surface of the pressure plate, the rising wall such as the inner cloth foundation is eliminated. Can expand the space under the floor. As a result, the air permeability under the floor can be improved, and the maintainability under the floor can be improved. In addition, since it is only necessary to install a column for bundling after the pressure plate is installed, there is no need to install or remove extra formwork, as in the case of providing a padding foundation, and a large work space can be secured. The workability can be improved and the work period can be shortened and the cost can be reduced.

  The foundation structure using the heat insulation formwork of the invention of claim 3 is the heat insulation foundation structure according to claim 2, wherein the ground structure is formed inside the pressure plate at the lower side of the at least one columnar body for bundling. It is characterized by a built-in beam.

  According to the basic structure using the heat insulation form of the invention of claim 3, since the underground beam is built inside the pressure plate on the lower side of the columnar body for bundling at least one place, The strength can be sufficiently increased.

  The foundation structure using the heat insulation formwork of the invention of claim 4 is a foundation structure using the heat insulation formwork according to any one of claims 1 to 3, and is formed of crushed stone as the pressure-resistant lower formwork form. The above-mentioned pressure-resistant plate is constructed by placing concrete on the formwork via a moisture-proof sheet.

  According to the basic structure using the heat-insulating form of the invention of claim 4, the form formed of crushed stone is used as the pressure-resistant plate form, and concrete is placed thereon via a moisture-proof sheet. Thus, since the pressure plate is constructed, a specially produced formwork is unnecessary, and the construction cost can be reduced.

  The foundation structure using the heat insulation formwork of the invention of claim 5 is the foundation structure using the heat insulation formwork according to any one of claims 1 to 4, wherein the extension direction of the outer peripheral foundation beam is defined as the heat insulation form. When it is set as the longitudinal direction of the mold, a large number of the heat insulating molds are connected in the longitudinal direction and stacked in the vertical direction, and one heat insulating mold of the plurality of stacked heat insulating molds The inner peripheral mold of the upper and lower heat-insulating molds stacked in the height direction dimension of the inner peripheral mold form plate is set to be shorter than the height dimension of the outer peripheral mold form plate. The opening is secured between the frame plates, and in order to ensure the opening, the inner peripheral formwork of the lower heat insulation formwork is provided between the inner peripheral formwork plates of the upper and lower heat insulation formwork. The board is provided with a support member for transmitting a load of the inner peripheral formwork plate of the upper heat insulating formwork.

  According to the basic structure using the heat insulating form of the invention of claim 5, since the opening is secured by arranging the support member between the upper and lower form plates on the inner peripheral side of the heat insulating form, the opening The peripheral foundation beam and the pressure plate can be smoothly connected through reinforced concrete.

  The foundation structure using the heat insulation formwork of the invention of claim 6 is a base structure using the heat insulation formwork of claim 5, and is a connection position in the longitudinal direction of the heat insulation formwork of the upper stage stacked. And the connection position in the longitudinal direction of the heat-insulating mold at the lower stage thereof are shifted in the longitudinal direction.

  According to the basic structure using the heat insulation form of the invention of claim 6, the longitudinal connection position of the upper heat insulation mold and the connection position in the longitudinal direction of the lower heat insulation form are shifted. The connection part of the heat insulation formwork (lower heat insulation formwork) can be connected to the lower heat insulation formwork (upper heat insulation formwork). Therefore, it is possible to avoid a decrease in the assembly strength of the mold due to the connection positions of the upper and lower heat insulating molds overlapping. Moreover, it becomes difficult to make useless gaps between the molds, which can contribute to improvement of construction quality.

  The foundation structure using the heat insulation formwork of the invention of claim 7 is a foundation structure using the heat insulation formwork according to claim 5 or 6, and corresponds to a straight portion in which the outer peripheral foundation beam extends linearly. The linear heat-insulating form and the L-shaped heat-insulating form corresponding to a corner portion where the outer peripheral foundation beam is bent in an L-shape are used, and the linear heat-insulating form is disposed in the straight part. The L-shaped heat insulation formwork is arranged at the corner portion.

  According to the foundation structure using the heat insulating form of the invention of claim 7, in order to construct a form of the outer peripheral foundation beam by preparing a linear heat insulating form and an L-shaped heat insulating form in advance, Construction can be facilitated.

  The construction method of the foundation structure using the heat insulation form of the invention of claim 8 is a pair of synthetic resin foam molds arranged in parallel with each other at a predetermined interval, and between them as a concrete placement space. A heat insulating mold having a frame plate and a metal connecting member for connecting both mold plates in the state of being spaced apart by being embedded and fixed at both ends in the pair of mold plates. The frame is disposed as a discarded mold frame at the construction site of the outer peripheral foundation beam. At that time, the pressure-resistant plate mold is located at a position corresponding to the height of the pressure-resistant plate of the mold plate on the inner peripheral side of the heat-insulating mold frame. An opening communicating with the upper pressure plate concrete placing space is secured, and reinforcing bars for the outer peripheral foundation beam are arranged inside the heat insulation formwork and a pressure plate reinforcement is placed on the upper side of the pressure plate lower formwork. Furthermore, it connects from the upper side of the pressure-resistant plate lower mold to the inside of the heat insulation mold through the opening. By placing concrete in the inner space of the heat insulation formwork and the pressure plate concrete placing space above the pressure plate lower formwork, the outer foundation foundation beam and the pressure plate are integrated. It is characterized by building a basic.

  According to the construction method of the foundation structure using the heat insulation formwork of the invention of claim 8, in order to construct the outer peripheral foundation beam using the heat insulation formwork that can exhibit sufficient strength while increasing the placement volume of the concrete In addition to ensuring high concrete strength, construction quality can be improved. Moreover, since the outer peripheral foundation beam and the pressure plate can be constructed by a single concrete placement, the construction can be facilitated.

  A method for forming a pressure-proof plate-type grid post foundation according to the invention of claim 9 is a method for constructing a heat-insulating foundation structure according to claim 8, wherein the pressure-resistant plate is applied under the ground surface and is used for bundling in the pressure-resistant plate. It is characterized by constructing an underground beam for reinforcement on the lower surface of the planned location of the columnar body, and installing a baststone columnar body as a grid post on the upper surface of the planned location of the columnar body for the boulder stone. .

  According to the pressure plate type grid post foundation forming method of the invention of claim 9, the pressure plate is constructed under the ground surface on the inner peripheral side of the outer peripheral foundation beam, and a reinforcing underground beam is constructed in the pressure plate, By installing a boulder column as a grid post on the underground beam, it is possible to create a pressure-resistant plate post structure that can exhibit high strength while ensuring air permeability in the underfloor space. .

  According to the present invention, there is no concern that the heat-insulated formwork will be damaged, and the concrete placement volume can be sufficiently secured, thereby ensuring the cross-sectional performance of the reinforced concrete and maintaining high construction quality and heat insulation performance. It is possible to provide a foundation structure using a heat-insulating mold, a construction method for the foundation using a heat-insulating mold, and a method for forming a pressure-resistant plate post foundation.

It is a schematic perspective view which shows the external appearance of the basic structure using the heat insulation formwork of embodiment of this invention. It is a schematic plan view of the basic structure using the heat insulation formwork. (A) is an example of the AA arrow sectional drawing of FIG. 2, (b) is the other example of the AA arrow sectional drawing of FIG. It is a front view which shows the heat insulation formwork used in the embodiment, (a) is a front view of the heat insulation formwork of type A in which the heights of the upper ends of the left and right formwork plates are set to be the same, and (b) is one of The front view of the heat insulation formwork of the type B set so that the upper end of a formwork board may become higher than the upper end of the other formwork board, (c) is the height of the upper end of a left and right formwork board from type A It is a front view of the heat insulation formwork of type C set equally in the lower position. It is a perspective view which shows the structure of the metal connection members (it is also called a bridging material) currently used for the said heat insulation formwork. It is a perspective view which shows the example of the heat insulation form which the shape seen from two types, E type and F type for corner parts used in the embodiment. It is a sectional side view which shows the state at the time of construction of the foundation structure using the heat insulation formwork of the embodiment. It is explanatory drawing of the supporting member shown in FIG. It is a perspective view (1) for description of the construction procedure of the foundation structure using the heat insulation formwork of the embodiment. It is a perspective view (2) for description of the following process content of FIG. It is a perspective view (3) for description of the following process content of FIG. It is a perspective view for explanation of how to stack the heat insulation formwork at the corner portion of the foundation structure using the heat insulation formwork of the embodiment. It is a sectional side view which shows the state at the time of construction in the case of extending the lower end of an outer periphery foundation beam to a deeper position than the case shown in FIG. The front view ((a)-(c)) and perspective view ((d)-(e)) which show another aspect of the heat insulation formwork in this embodiment. It is a perspective view which shows the state in the middle of construction of the foundation structure using the heat insulation formwork in another aspect of this embodiment. It is sectional drawing which shows the state in the middle of construction of the foundation structure using the heat insulation formwork in another aspect of this embodiment.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a schematic perspective view showing the external appearance of a foundation structure using the heat insulation formwork of the present embodiment, FIG. 2 is a schematic plan view of the heat insulation foundation structure, and FIG. 3 is a cross-sectional view taken along the line AA in FIG. , (A) and (b) are shown in two examples.

  As shown in FIGS. 1-3, in the foundation structure 1 (henceforth the heat insulation foundation structure 1) using the heat insulation formwork of this embodiment, the heat insulation formwork 10 (refer FIG. 3 (a), (b)). ) Is installed at the construction site of the outer foundation beam 2 as a formwork, and at the same time as the outer foundation beam 2, the pressure plate 3 is installed inside the outer foundation beam 2 under the ground surface GL. 3 and the outer peripheral foundation beam 2 are integrally formed. In addition, after the pressure plate 3 is installed, a boulder columnar body 4 as a grid post is installed and fixed at a predetermined location on the pressure plate 3 as a retrofit.

  During the construction of the heat insulating basic structure 1, the pressure-resistant plate concrete placement on the upper side of the pressure-resistant plate lower mold 32 is placed at a position corresponding to the height of the pressure-resistant plate 3 of the mold plate 12 on the inner peripheral side of the heat-insulating mold 10. An opening 20 communicating with the installation space 3A is secured. A reinforcing bar 26 for the outer peripheral foundation beam is arranged inside the heat insulating mold 10, a reinforcing bar 27 for pressure plate is arranged on the upper side of the pressure plate lower mold 32, and further the pressure plate lower mold 32 through the opening 20. Reinforcing bars 27a are arranged from the upper side to the inside of the heat insulating mold 10. The connecting reinforcing bar 27a is configured by, for example, extending and bending a part of the pressure-resistant plate reinforcing bar 27 to a position reaching the inside of the heat insulating mold 10.

  Then, the concrete 50 is placed in the inner space (outer foundation beam concrete placement space) 2A of the heat insulation mold 10 and the pressure plate concrete placement space 3A on the upper side of the pressure plate lower mold 32, so that the outer foundation is placed. The heat insulation basic structure 1 of the embodiment in which the beam 2 and the pressure plate 3 are integrally constructed is constructed. Further, in the present embodiment, before the concrete 50 is placed, the polyethylene film 60 is laid on the upper surface of the pressure plate lower mold 32, and then the concrete 50 is placed. By laying the polyethylene film 60 in this way, it is possible to omit the abandoned concrete before placing the concrete 50, thereby shortening the work period and reducing the cost. Further, the polyethylene film 60 can prevent the concrete from flowing out, and the design pressure plate thickness can be reliably ensured. The polyethylene film 60 may not be laid.

  In this embodiment, as the pressure-resistant plate lower mold 32, a mold made of crushed stone is directly used, and a concrete film 50 is placed on the polyethylene film (moisture-proof sheet) 60. 3 is built. Thus, when the formwork of the pressure plate 3 (pressure plate lower formwork 32) is composed only of crushed stone, there is an advantage that no other special formwork is required.

  Here, as shown in FIG. 3, a reinforcing underground beam 8 is constructed inside the pressure-resistant plate 3 as shown in FIG. Keep it. And the anchor material 6 is previously arrange | positioned in the arrangement | positioning plan location of the columnar body for bunch stones, and the columnar body 4 for bundling retrofitted using the anchor material is fixed. In addition, an anchor material for fixing the base of the building, the large drawing 5 and the like is arranged at the upper end of the boulder columnar body 4.

  The cross-sectional shape of the boulder columnar body 4 can be arbitrarily selected from a cross shape, a T shape, an L shape, an I shape, an O shape, and the like. Moreover, the material of the columnar body 4 for the boulders can be arbitrarily selected from PC material, vinyl chloride, hard plastic, iron and the like. Moreover, the columnar body 4 for boulders may be formed by arranging a cylinder on the pressure plate 3 and placing concrete inside the cylinder.

Next, the construction method of the said heat insulation basic structure 1 is demonstrated.
FIG. 4 is a front view showing the heat insulation mold used in the present embodiment. FIG. 4A is a front view of a type A heat insulation mold in which the heights of the upper ends of the left and right mold plates are set to be the same. Is a front view of a heat insulating mold of type B set so that the upper end of one mold plate is higher than the upper end of the other mold plate, (c) is the height of the upper ends of the left and right mold plates FIG. 5 is a perspective view showing a configuration of a metal connecting member (also referred to as a bridging material) used in the heat insulating mold, which is set at the same position at a position lower than Type A. FIG. FIG. 6 and FIG. 6 are perspective views showing an example of a heat-insulating form having an L-shaped shape as seen from above, two types of E-type and F-type for corner portions used in this embodiment.

  Here, three types of heat-insulating molds 10A, 10B, and 10C having different heights are basically used as discard molds for constructing the outer peripheral foundation beam 2, as shown in FIG. These are the linear heat insulation formwork 10A, 10B, 10C corresponding to the linear part where the outer periphery foundation beam 2 extends linearly. In addition to these, heat-insulating molds 10E and 10F whose shapes viewed from above are L-shaped as shown in FIG. 6 corresponding to corner portions where the outer peripheral foundation beam 2 bends in an L-shape are also used. Moreover, although not shown in FIG.4 and FIG.6, the heat insulation formwork of the smaller height for the height adjustment is also used as needed.

  The heat insulation molds 10A, 10B, and 10C of types A, B, and C shown in FIG. 4 have a pair of mold plates 11 and 12 and a connecting member 13. The pair of mold plates 11 and 12 are arranged in parallel with each other at a predetermined interval, and the space between them is a concrete placement space 16. The connecting member 13 is a metal bridging material that connects both the mold plates 11 and 12 with the predetermined interval between them by embedding and fixing both ends in the pair of mold plates 11 and 12. is there.

  A fitting recess 14 is formed on the upper end surfaces of the heat insulating molds 10A, 10B, and 10C of type A, B, and C so as not to open at least to the concrete placement space 16 side. . Further, the fitting recesses formed on the upper end surfaces of the lower heat-insulating molds 10A, 10B, and 10C are formed on the lower end surfaces of the heat-insulating molds 10A, 10B, and 10C of the type A, B, and C types. The fitting convex part 15 fitted to 14 is formed. In addition, it is made not to provide the fitting recessed part 14 in the upper end surface of the heat insulation formwork arrange | positioned in the uppermost stage irrespective of a type. Moreover, the fitting convex part 15 does not need to be formed in the lower end surface of the heat insulation form frame arrange | positioned in the lowest step depending on the case.

  As shown in FIG. 5, the connecting member 13 is made of a pressed metal plate, and is perpendicular to the web portion 13 a that bridges both mold frame plates 11 and 12, and both ends 13 b and 13 b of the web portion 13 a. And a flange portion 13c formed by bending. By inserting the mold plates 11 and 12 made of synthetic resin foam into the molds at both ends 13b and 13b of the web part 13a and the flange part 13c, which are both ends of the connecting member 13, the mold An anchor hole 13d is formed to be embedded in the frame plates 11 and 12, and to increase the fixing strength when each is embedded. In addition, a pair of reinforcing bar receiving grooves 13e are formed at the center upper edge of the web portion 13a with a space therebetween, and a notch 13f for cutting unnecessary portions is formed at the center lower edge of the web portion 13a. The reinforcing bar receiving groove 13e is formed in a portion that can receive the lateral bars arranged as necessary.

  On the other hand, the mold plates 11 and 12 are made of a synthetic resin foam that is lightweight and has excellent heat insulation and durability, moldability, and mass productivity. Specifically, it is preferably composed of a synthetic resin foam having closed cells of polystyrene foam, but polyethylene (including a copolymer), polypropylene (including a copolymer), polyethylene / polystyrene composite resin. Or a synthetic resin foam made of acrylonitrile / styrene copolymer or the like.

  A plurality of connecting members 13 are provided at regular intervals in the longitudinal direction of both mold plates 11 and 12. The concrete placement space 16 penetrates in a vertical direction and a longitudinal direction at a place where the connecting member 13 is not provided. The longitudinal direction is the direction in which the outer peripheral foundation beam 2 to be constructed extends. The heat insulating molds 10A, 10B, and 10C are configured as blocks in which the length in the longitudinal direction is set to an appropriate unit length.

  Here, the type A heat-insulating formwork 10A shown in FIG. 4A is configured such that the heights of the upper ends of the left and right formwork plates 11 and 12 are set to be the same. 4B is set such that the upper end of one mold plate 11 is higher than the upper end of the other mold plate 12. As shown in FIG. In addition, the type C heat insulating mold 10C shown in FIG. 4C is configured such that the heights of the upper ends of the left and right mold plates 11 and 12 are set to be the same at a position lower than that of the type A. The difference in height between the upper ends of the left and right mold plates 11 of the type B heat insulating mold 10B is set to be equal to or greater than the thickness of a pressure plate (slab) described later.

  The type A, B, and C heat insulating molds 10A, 10B, and 10C shown in FIGS. 4 (a), 4 (b), and 4 (c) have a linear shape corresponding to a linear portion in which the outer peripheral foundation beam 2 extends linearly. Although it is a heat insulation formwork, in the corner part where the outer periphery foundation beam 2 bends in L shape, as shown in FIG. 6, two types of heat insulation formwork 10E, 10F of E type and F type bent in L shape are shown. Is used.

  The heat insulation molds 10E and 10F of type E and F are also composed of a pair of left and right mold plates 11 and 12 and a connecting member 13 for connecting them, like the heat insulation molds 10A and 10B of type A and B. Is. In the type E heat insulating mold 10E, the heights of the upper ends of the left and right mold plates 11 and 12 are set to be equal, as in the type A heat insulating mold 10A. On the other hand, the type F heat insulation formwork 10F is set to have different heights at the upper ends of the left and right formwork plates 11 and 12, similarly to the type B heat insulation formwork 10B.

  Further, as shown in FIG. 6, the left and right mold plates 11 and 12 are bent in an L shape when viewed from above, and the straight portions on both sides of the bent portion are the sleeve portions 10Ea, 10Eb, 10Fa, When called 10Fb, the lengths of the sleeve portions 10Ea, 10Eb, 10Fa, and 10Fb are different from each other. That is, in the type E heat-insulating formwork 10E, the length a1 of the left sleeve 10Ea in the drawing is shorter than the length b1 of the right sleeve 10Eb. On the other hand, in the type F heat insulating form 10F, the length a2 of the left sleeve 10Fa in the drawing is longer than the length b2 of the right sleeve 10Fb, contrary to the type E.

  Thus, the left and right sleeve portions 10Ea, 10Eb, 10Fa, and 10Fb are prepared with different types of heat insulating molds 10E and 10F. In this case, the left and right sleeve portions 10Ea, 10Eb, 10Fa, and 10Fb are prepared. A so-called right-and-left heat-insulating form (represented by the same reference numerals 10E and 10F) whose length is set in reverse is also prepared as necessary. When the left and right sleeve portions 10Ea, 10Eb, 10Fa, and 10Fb have different lengths, when the heat insulating molds 10E and 10F are stacked up and down, as shown in FIG. The connection position P in the direction and the connection position P in the longitudinal direction of the heat insulating molds 10E and 10F in the lower stage are stacked so as to be shifted in the longitudinal direction. By doing so, the connection position P of the upper and lower heat insulation formwork will shift at any position (straight portion) in the longitudinal direction of the outer peripheral foundation beam 2.

  When constructing the heat insulation foundation structure of the present embodiment, for example, as shown in FIGS. 7 and 9, first, the digging and crushed stone industry of the construction site of the outer peripheral underground beam is performed. That is, a groove is dug in the ground, and the crushed stone 31 is laid in the groove, and then the discarded concrete 25 is placed thereon. Next, inking for installing the heat insulating formwork is performed, and a plastic angle 29 for fixing the heat insulating formwork is installed along the inking. In addition, a spacer block 33 is installed to secure the concrete cover thickness, and the lower end reinforcing bar (lower end main reinforcing bar) 34 and the like are arranged in a state where the spacer block 33 is lifted from the discarded concrete 25 by a certain distance. In addition, it is good also as a structure which lays the polyethylene film 60 on the upper surface of the crushed stone 31, and abbreviate | omits placement of the discard concrete 25. FIG.

  Next, the type B heat insulation formwork 10B shown in FIG. Moreover, the type F heat insulation formwork 10F shown in FIG. 6 is installed about the corner part of an outer periphery foundation beam. In these types of heat insulating molds 10B and 10F, the height of the inner peripheral mold plate 12 is set lower than the height of the outer peripheral mold plate 11.

  Further, for the T-shaped portion and the cross portion of the outer peripheral foundation beam, the mold plates 11 and 12 of the type B heat insulation mold 10B are appropriately cut out and opened, and the edges of the heat insulation mold 10B intersecting the edges of the openings. The end portions of the mold plates 11 and 12 are connected. Note that when the first-stage heat-insulating molds 10B and 10F are installed, the assembly of the molds proceeds in order starting from the corner, T-shaped part, and cross.

  On the other hand, as shown in FIG. 7, as shown in FIG. 7, digging and crushed stone are also carried out on the construction surface of the pressure plate 3, and the pressure plate lower formwork 32 whose upper side becomes the pressure plate concrete placement space 3 </ b> A is formed by crushed stone. .

  Next, as shown in FIGS. 7 and 10, the second-stage heat-insulating mold 10 </ b> C (the heat-insulating mold 10 </ b> E for the corner portion) is replaced with the first-stage heat-insulating mold 10 </ b> B (the heat-insulating mold 10 </ b> F for the corner portion). ). The starting position of the product stage is the same as the first stage. When stacking the second-stage heat-insulating formwork 10C, the fitting convex portion 15 formed on the lower end surface of the outer-side formwork plate 11 is formed on the outer-side formwork plate 11 on the lower-stage heat-insulating formwork 10B. It fits in the fitting recessed part 14 formed in the end surface. At the same time, the second-stage heat-insulating mold 10 </ b> C is piled up on the mold board 11 having a low height on the inner peripheral side of the lower-stage heat-insulating mold 10 </ b> B via the support hardware (support member) 28.

  As shown in FIG. 8, the support hardware 28 used here has U-shaped fitting portions 28 a and 28 b that fit on the lower end and the upper end of the upper and lower mold plates 12 at the upper end and the lower end, respectively. And a U-shaped fitting portion 28a, 28b at the lower end are connected by a bolt 28c whose length can be adjusted.

  The fitting portion 28b at the lower end of the support metal 28 is fitted into the upper end of the mold plate 12 on the inner peripheral side of the first-stage heat-insulating mold 10B. Then, by fitting the fitting portion 28a at the upper end of the support metal 28 to the lower end of the mold plate 12 on the inner peripheral side of the second-stage heat-insulating mold 10C, the inner peripheral mold of the lower-stage heat-insulating mold 10B. The frame plate 12 supports the load of the mold plate 12 on the inner peripheral side of the upper heat insulating mold 10C. Thereby, the opening which connects the internal space 2A of the heat insulation formwork 10 and the pressure plate concrete placing space 3A between the inner peripheral side formwork plates 12 and 12 of the stacked upper and lower heat insulation formwork 10B and 10C. Part 20 is secured.

  Subsequently, as shown in FIG. 11, the third-stage heat-insulating mold 10 </ b> A is stacked on the second-stage heat-insulating mold 10 </ b> C, and the upper-stage (third-stage in this embodiment) heat-insulating mold 10 </ b> A. Is cut at the position of the construction upper end line of the outer peripheral foundation beam 2. Further, the reinforcing bars 26 for the outer peripheral foundation beams are arranged inside the heat insulating mold 10 (10B, 10C, 10A) in accordance with the stacking stage of such heat insulating molds. In addition, the pressure plate reinforcing bar 27 is also arranged on the upper side of the pressure plate lower mold 32 by this stage.

  When the assembly of the heat insulation mold 10 is completed in the manner described above, the concrete 50 is placed in the pressure plate concrete placing space 3A above the pressure plate lower mold 32 and the internal space 2A of the heat insulation mold 10. The cast concrete 50 is filled in the heat insulating mold 10 and on the upper side of the pressure-resistant plate-shaped heat insulating mold 45. As the concrete hardens, the outer peripheral foundation beam 2 and the pressure plate 3 are integrated. Thereafter, the heat insulating foundation structure 1 of the embodiment is completed by installing and fixing the bony stone columnar bodies 4 at predetermined positions on the upper surface of the pressure plate 3.

  In this heat insulation basic structure 1, since the heat insulation formwork 10 is left as a discarded formwork, it becomes possible to improve the heat insulation property under the floor of a building.

  According to the heat insulating basic structure 1 described above, the outer peripheral foundation beam 2 for constructing the heat insulating mold 10 (10A, 10B, 10C, 10E, 10F) as a discarded mold, and the pressure plate 3 are formed in the heat insulating mold 10. Since it can form integrally by one concrete placement through the provided opening part 20, construction can be facilitated. Further, since the pressure-resistant plate 3 is constructed at the height of the opening 20 secured in the mold plate 12 on the inner peripheral side of the heat insulating mold 10, the height of the floor of the building is set at the position of the upper end of the outer peripheral foundation beam 2. When combined, an underfloor space can be secured between the pressure-resistant plate 3 and the floor.

  Further, in the heat insulating base structure 1, the heat insulating form 10 used as a discarded form for the outer peripheral foundation beam 2 has a connecting member 13 for connecting a pair of synthetic resin foam form plates 11 and 12 made of metal. Therefore, sufficient connection strength can be exhibited with a small cross-sectional area. Further, since both ends of the connecting member 13 are embedded and fixed in the mold plates 11 and 12 made of synthetic resin foam, the bonding strength between the mold plates 11 and 12 and the connecting member 13 is sufficiently exhibited. Can do. Therefore, both mold frame plates 11 and 12 can be reliably held at a predetermined interval, there is no risk of damage during construction, and construction quality can be improved. Further, since the metal connecting member 13 has a small cross-sectional area from the viewpoint of strength, the concrete placement volume can be made as large as possible, and the outer peripheral foundation beam 2 having high reinforced concrete strength can be constructed. . As a result, the heat insulating basic structure 1 in which the outer peripheral foundation beam 2 and the pressure plate 3 are integrated, particularly the heat insulating basic structure 1 having high rigidity against horizontal force and non-settled subsidence, without a cost by a simple construction method. Can be obtained.

  Further, according to the heat insulating foundation structure 1, the columnar body 4 for boulders as a grid post is installed on the upper surface of the pressure-resistant plate 3. Can be expanded. As a result, the air permeability under the floor can be improved, and the maintainability under the floor can be improved. In addition, since it is only necessary to install the columnar body 4 for the boulder stone after the pressure plate 3 is installed, it is not necessary to install or remove the extra formwork as in the case of providing the inner cloth foundation, ensuring a wide working space. As a result, the workability can be improved and the work period can be shortened and the cost can be reduced.

  Moreover, according to the said heat insulation basic structure 1, since the underground beam 8 is constructed | assembled in the inside of the pressure-resistant plate 3 of the lower side of the columnar body 4 for at least one bunch stone, the support strength of the said part is fully provided. Can be increased.

  Moreover, according to the said heat insulation basic | foundation structure 1, the formwork formed with the crushed stone is used as the pressure-resistant plate lower mold 32, and the pressure-resistant plate 3 is formed by placing concrete through a moisture-proof sheet | seat on it. Since it is constructed, a specially produced formwork is unnecessary, and the construction cost can be reduced.

  Further, according to the heat insulating basic structure 1, since the opening 20 is secured by arranging the support hardware 28 between the upper and lower mold plates 12 on the inner peripheral side of the heat insulating mold 10, the outer periphery is passed through the opening 20. The foundation beam 2 and the pressure plate 3 can be smoothly connected with reinforced concrete.

  Moreover, according to the said heat insulation basic | foundation structure 1, since the connection position P of the longitudinal direction of the upper heat insulation formwork 10E (10F) and the connection position P of the lower heat insulation formwork 10E (10F) are shifted, The lower heat insulation formwork (upper heat insulation formwork) can be connected to the connection location of the upper heat insulation formwork (lower heat insulation formwork). Therefore, it is possible to avoid a decrease in the assembly strength of the mold due to the overlapping of the connection positions P of the upper and lower heat insulating molds 10E (10F). Moreover, it becomes difficult to make useless gaps between the molds, which can contribute to improvement of construction quality.

  Moreover, according to the said heat insulation basic | foundation structure 1, since the linear heat insulation formwork 10A, 10B, 10C and the L-shaped heat insulation formwork 10E, 10F are prepared previously, the formwork of the outer periphery foundation beam 2 is constructed, It is possible to facilitate the formwork construction.

  Moreover, according to the construction method of the said heat insulation foundation structure 1, since the outer periphery foundation beam 2 is constructed using the heat insulation formwork 10 which can exhibit sufficient intensity | strength, aiming at expansion of the placement volume of the concrete 50, high concrete strength Can be secured, and the construction quality can be improved. Moreover, since the outer peripheral foundation beam 2 and the pressure plate 3 can be constructed by a single concrete placement, the construction can be facilitated.

  Further, according to the construction method of the heat insulating foundation structure 1, the pressure plate 3 is constructed under the ground surface GL on the inner circumference side of the outer circumferential foundation beam 2, and the reinforcing underground beam 8 is constructed inside the pressure plate 3. In addition, by installing the boulder columnar body 4 as a grid post on the underground beam 8, a foundation structure capable of exhibiting high strength can be made while ensuring the air permeability of the underfloor space.

  In the above-described basic structure, as shown in FIG. 7, the type B heat insulation formwork 10B is installed in the first stage, and the type C heat insulation formwork 10C and the type A heat insulation formwork 10A are provided thereon. Although the case where it piled up as the 2nd stage and the 3rd stage was shown, you may pile up the heat insulation formwork 10A, 10B, 10E, 10F in more stages, and may construct a foundation.

  For example, instead of increasing the number of product stages upward, the number of product stages may be increased downward as shown in FIG. In the example shown in FIG. 13, in order to extend the lower end of the outer peripheral foundation beam 2 deeper into the ground, the heat insulating molds 10A and 10C are stacked further below the heat insulating mold 10B. By configuring in this way, it is possible to construct a high-performance peripheral foundation beam 2 even in a cold district where the freezing depth is deep.

  Moreover, you may use the heat insulation form 10G-10L as shown in FIG. 14 as another aspect of heat insulation form 10A-10F used in the said embodiment. The heat insulating molds 10A to 10F and the heat insulating molds 10G to 10L are different only in that the direction of the connecting member 13 is arranged upside down. That is, the heat insulating molds 10A to 10F are arranged so that the notch 13f (see FIG. 2) of the web portion 13a of the connecting member 13 is positioned at the lower central edge, whereas the heat insulating molds 10G to 10L are notched. 13f is arranged so as to be located at the center upper edge. You may use combining the heat insulation members 10A-10F and the heat insulation formwork 10G-10L comprised in this way.

Specifically, as shown in FIGS. 15 and 16, the heat insulating molds 10G to 10L (indicated by 10K in FIGS. 15 and 16) are arranged on the lower side, and the heat insulating molds 10A to 10F (FIG. 15, FIG. 16). 16 indicates 10F) on the upper side. By arranging in this way, a large space can be secured between the connecting members 13 of the lower heat insulating molds 10G to 10L and the connecting members 13 of the upper heat insulating molds 10A to 10F. As a result, the strength of the underground beam can be ensured even if the lower end reinforcing bar 37 is arranged between the connecting members 13 and 13.
By configuring in this way, instead of assembling the rebar in the field, the rebar arrangement of the lower end rebar 37 is completed simply by arranging the rebar assembled in a lattice shape in advance between the connecting members 13, 13. The construction procedure can be simplified.

  Moreover, in this embodiment, although the bony stone columnar body 4 as a grid post was installed on the upper surface of the pressure-resistant plate 3, a cloth-like foundation may be used.

1 Foundation structure using heat insulation formwork (insulation foundation structure)
2 Outer foundation beam 2A Internal space (Outer foundation beam concrete placement space)
DESCRIPTION OF SYMBOLS 3 Pressure-resistant plate 3A Pressure-resistant concrete placement space 4 Column for boulders 8 Underground beam 10, 10A, 10B, 10C, 10E, 10F, 10G, 10H, 10I, 10K, 10L Insulation formwork 11,12 Formwork plate DESCRIPTION OF SYMBOLS 13 Connecting member 20 Opening 26 Reinforcing bar for outer periphery foundation beam 27 Reinforcing bar for other pressure plate 27a Connecting reinforcing bar 28 Support hardware (support member)
32 Pressure-resistant lower formwork 50 Concrete P Connection position

Claims (9)

A pair of synthetic resin foam mold plates arranged in parallel to each other with a predetermined interval between them and a concrete placement space therebetween, and both ends embedded and fixed in the pair of mold plates, respectively. In this way, a heat-insulating formwork having a metal connecting member that connects the two formwork plates in a state of being spaced apart from each other is used as a discarded formwork of the outer peripheral foundation beam,
It communicates with the pressure plate concrete placement space on the upper side of the pressure plate lower mold frame at a position corresponding to the height of the pressure plate of the mold plate on the inner peripheral side of the heat insulation mold frame used as the disposal mold frame. An opening is secured,
Reinforcing bar for outer peripheral foundation beam is arranged inside the heat insulation formwork, a reinforcing bar for pressure plate is placed on the upper side of the pressure plate lower mold frame, and further from the upper side of the pressure plate lower mold frame through the opening. Reinforcing bars are placed inside the heat-insulated formwork,
Then, the outer peripheral foundation beam and the pressure plate are constructed integrally by placing concrete in the space inside the heat insulating formwork and the pressure plate concrete placing space above the pressure form lower formwork. A basic structure using a heat-insulated formwork.   The foundation structure using the heat insulation formwork according to claim 1, wherein a columnar body for a boulder stone is installed at a predetermined position on an upper surface of the pressure plate as a grid post after installation of the pressure plate. .   The foundation structure using the heat insulation formwork according to claim 2, wherein an underground beam is constructed in the pressure-resistant plate below the at least one columnar body for boulders.   As the pressure-resistant plate mold, a mold formed of crushed stone is used, and the pressure-resistant plate is constructed by placing concrete on the moisture-proof sheet thereon. The basic structure using the heat insulation formwork of any one of Claims 1-3 to do.   When the extending direction of the outer peripheral foundation beam is the longitudinal direction of the heat insulating mold, a plurality of the heat insulating molds are connected in the longitudinal direction and stacked in the vertical direction. When the height direction dimension of the inner peripheral side mold frame plate of the one-stage heat insulating mold frame of the mold frames is set shorter than the height direction dimension of the outer peripheral side mold frame plate, The opening is secured between the inner peripheral formwork plates of the upper and lower heat insulation molds, and in order to ensure the opening, the lower side between the inner peripheral formwork plates of the upper and lower heat insulation molds The support member which transmits the load of the formwork board of the inner peripheral side of an upper heat insulation formwork is provided in the formwork board of the inner periphery side of the heat insulation formwork of any one of Claims 1-4 characterized by the above-mentioned. A basic structure using the heat insulating form described in 1.   6. The connection position in the longitudinal direction of the heat-insulated formwork in the upper stage stacked and the connection position in the longitudinal direction of the heat-insulation formwork in the lower stage are shifted in the longitudinal direction. Basic structure using heat-insulated formwork.   The linear heat-insulating mold corresponding to the straight part where the outer peripheral foundation beam extends linearly and the L-shaped thermal insulating form corresponding to the corner where the outer peripheral basic beam bends in an L-shape are used. The heat insulation formwork according to claim 5 or 6, wherein the linear heat insulation formwork is arranged in the straight part and the L-shaped heat insulation formwork is arranged in the corner part. The basic structure used. A pair of synthetic resin foam mold plates arranged in parallel to each other with a predetermined interval between them and a concrete placement space therebetween, and both ends embedded and fixed in the pair of mold plates, respectively. A heat-insulating formwork having a metal connecting member for connecting the two formwork plates in a state of being spaced apart from each other at a construction position of the outer peripheral foundation beam, In the position corresponding to the height of the pressure plate of the mold plate on the inner peripheral side of the heat insulation mold, an opening communicating with the pressure plate concrete placing space on the upper side of the pressure plate lower mold is secured,
The reinforcing bar for the outer peripheral foundation beam is disposed inside the heat insulating mold, and the reinforcing bar of the pressure plate is disposed on the upper side of the pressure plate lower mold, and further, the heat insulating mold from above the pressure plate lower mold through the opening. Place the connecting rebar to the inside of the frame,
After that, by placing concrete in the space inside the heat-insulated formwork and the pressure-proof concrete placement space above the pressure-proof platen, the foundation with the outer foundation foundation beam and the pressure-proof plate integrated is built. The construction method of the foundation structure using the heat insulation formwork characterized by doing. In the construction method of the foundation structure using the heat insulation formwork according to claim 8,
The pressure plate is constructed under the ground surface, and a reinforcing underground beam is constructed on the lower surface of the planned location of the boulder pillars in the pressure plate, and the upper surface of the planned location of the boulder columns. A method for forming a pressure-proof type grid post foundation, characterized in that a columnar body for boulders as a grid post is installed on the plate.

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