JP6418523B2 - Foundation structure using heat-insulating formwork and method for forming pressure-proof soil foundation - Google Patents

Description

  The present invention relates to a foundation structure using a heat-insulating form frame in which underground beams are constructed using a heat-insulating form frame having heat insulating performance as a discarded form frame, and a method for forming a pressure-resistant plate-type soil foundation.

  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 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 building an underground beam that is the basis 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. there were.

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 using a heat insulating formwork capable of ensuring the cross-sectional performance of reinforced concrete and maintaining high construction quality and heat insulation performance, and a method for forming a pressure-resistant plate-type soil foundation.

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 for underground beams, and reinforcing bars for underground beams are arranged inside the heat insulation formwork, and the upper side of the heat insulation formwork and the heat insulation formwork under pressure plate The underground beam and the pressure plate are constructed integrally by placing the concrete of the pressure plate on the upper side and then placing the concrete, and the connecting member is a web that bridges the two form plates. A flange portion formed by bending at right angles to both ends of the web portion, A first heat-insulating formwork in which a cutout is formed in a central portion of the web portion, and the connection member is disposed so that the cutout faces downward, and the connection member such that the cutout faces upward The second heat insulation formwork is arranged, and the second heat insulation formwork is arranged at the lowermost stage .

  Since the connection member of the heat insulation formwork used for the foundation structure using the heat insulation formwork of the invention of claim 1 is made of metal, it can exhibit sufficient connection strength even with a small cross-sectional area. Moreover, since both ends of the connecting member are embedded and fixed in the mold plate made of synthetic resin foam, the bonding strength between the mold plate and the connecting member can be sufficiently exhibited. Therefore, both mold plates can be reliably held at a predetermined interval, and there is no possibility that the heat insulating mold is damaged during construction, so that the construction quality can be improved. Moreover, since the cross-sectional area of a connection member may be small, the placement volume of concrete can be taken as large as possible and high concrete strength can be ensured. Moreover, according to this foundation structure, since an underground beam and a pressure-resistant plate can be constructed by one concrete placement, the construction can be facilitated.

  The foundation structure using the heat insulation formwork of the invention of claim 2 is the foundation structure using the heat insulation formwork of claim 1, and is a lower side of the outer periphery of the pressure plate as one of the underground beams. The upper end of the formwork plate on the outer peripheral side of the heat-insulating mold for constructing the outer periphery underground beam is provided on the outer peripheral side of the mold plate on the inner peripheral side. It is characterized in that it is also used as a mold for forming the outer peripheral end face of the pressure-resistant plate by being formed with a dimension that is higher than the thickness.

  In the foundation structure using the heat insulation formwork of the invention of claim 2, the upper end portion of the outer formwork plate of the heat insulation formwork for forming the outer peripheral underground beam is used as the formwork forming the outer peripheral end face of the pressure plate. Since it is also used, it is not necessary to separately construct the outer peripheral formwork of the pressure plate, and the construction of the formwork is facilitated and the workability is improved.

  The foundation structure using the heat insulation formwork of the invention of claim 3 is the heat insulation foundation structure according to claim 1 or 2, wherein the extending direction of the underground beam is the longitudinal direction of the heat insulation formwork. In addition, a large number of the heat insulation molds are connected in the longitudinal direction and stacked in the vertical direction, and the connection position in the longitudinal direction of the upper heat insulation mold and the connection position in the longitudinal direction of the lower heat insulation mold are long. It is characterized by being out of direction.

  According to the basic structure using the heat insulation formwork of the invention of claim 3, since the connection position of the upper heat insulation form frame and the connection position of the lower heat insulation formwork are shifted, the upper heat insulation formwork (lower step) Assembling the formwork by connecting the connection positions of the lower heat insulation formwork (upper heat insulation formwork) to the connection points of the heat insulation formwork, and thereby overlapping the connection positions of the upper and lower heat insulation formwork It is possible to avoid a decrease in strength, and it is difficult to form a useless gap between the molds, which can contribute to improvement in construction quality.

  The foundation structure using the heat insulation formwork according to the invention of claim 4 is a foundation structure using the heat insulation formwork according to any one of claims 1 to 3, wherein the linear beam extends in a straight line. And the L-shaped heat-insulating mold corresponding to the corner portion where the underground beam bends in an L-shape, and the linear heat-insulating mold is used as the linear portion. A frame is arranged, and the L-shaped heat insulation type frame is arranged at the corner portion.

  According to the basic structure using the heat insulation formwork of the invention of claim 4, since a linear heat insulation formwork and an L-shaped heat insulation formwork are prepared in advance to construct the underground beam formwork, Construction can be facilitated.

The method for forming a pressure-resistant plate-type soil foundation according to the invention of claim 5 is a pair of synthetic resin foam mold plates that are arranged in parallel with each other at a predetermined interval, and between which the concrete is placed. A metal heat-insulating formwork having both ends fixedly embedded in the pair of formwork plates to connect the two formwork plates with the predetermined distance therebetween, Installed in the construction place of the middle beam, and placed the reinforcing rod for underground beam inside the heat insulation formwork, and then the pressure plate reinforcement on the upper side of the heat insulation formwork and the heat insulation formwork under the pressure plate By placing concrete on the foundation, and a foundation in which the underground beam and the pressure plate are integrated, the connecting member includes a web portion that bridges the two form plates, and A flange portion formed at a right angle at both ends of the web portion, and the web A notch is formed in the center of the first heat insulating formwork in which the connecting member is disposed so that the notch faces downward, and a second in which the connecting member is disposed so that the notch faces upward. And the second heat insulating mold is arranged at the lowest level .

  According to the method for forming a pressure-resistant plate-type soil foundation according to the invention of claim 5, since the underground beam is constructed using a heat-insulated formwork capable of exhibiting sufficient strength while increasing the placement volume of the concrete, high concrete strength Can be secured, and the construction quality can be improved. In addition, since the underground beam and the pressure plate can be constructed by a single concrete placement, the construction can be facilitated.

  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 method for forming a foundation structure using a heat-insulating formwork that can be used and a pressure-resistant plate-type soil foundation.

BRIEF DESCRIPTION OF THE DRAWINGS It is a front view which shows the heat insulation formwork used by embodiment of this invention, (a) is a front view of the heat insulation formwork of the type A by which the height of the upper end of a left and right formwork board was set equally, (b) is The front view of the heat insulation formwork of the type B set so that the upper end of one formwork board may become higher than the upper end of the other formwork board, (c) is a type with the height of the upper end of the left and right formwork boards It is a front view of the heat insulation formwork of the type C set identically in the position lower than A. It is a perspective view which shows the structure of the metal connection members (it is 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 formwork whose shape seen from two types, E type and F type for corner parts used by embodiment. It is explanatory drawing of the construction procedure of the foundation structure using the heat insulation formwork of the house shown as embodiment, (a) is a perspective view which shows the first process content, (b) is sectional drawing. FIGS. 5A and 5B are explanatory diagrams of the next process content of FIG. 4, in which FIG. 4A is a perspective view showing a state where a first-stage heat insulation form is installed, and FIG. It is explanatory drawing of the content of the next process of FIG. 5, and is sectional drawing which shows the state which piled up the 2nd-stage heat insulation formwork on the upper end of the 1st-stage heat insulation formwork. FIG. 7 is a cross-sectional view showing a state where a second-stage heat-insulating mold is being stacked on the upper end of the first-stage heat-insulating mold at the corner in the process shown in FIG. 6. FIG. 8 is a perspective view showing a state in which a digging hole is backfilled after the step shown in FIGS. 6 and 7 and a pressure-resistant plate under heat insulation form is set on a construction surface of the pressure-resistant plate. It is explanatory drawing which shows the state which has arrange | positioned the slab reinforcing bar on the pressure-resistant plate under heat insulation formwork after the process of FIG. 8, (a) is a perspective view, (b) is sectional drawing. FIG. 9 is a cross-sectional view showing a form installation state of an outer underground beam and an inner underground beam in the process of FIG. 8. It is sectional drawing which shows the state which cast concrete after the process of FIG. It is sectional drawing of the location which digs deeper than the location shown in FIG. 11, and constructed the underground beam. It is a perspective view which shows the relationship between an underground beam and a pressure-resistant plate. 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 front view showing a heat insulating mold used in the embodiment, (a) is a front view of a type A heat insulating mold in which the heights of the upper ends of the left and right mold plates are set to be the same, and FIG. The front view of the heat insulation formwork of the type B set so that the upper end of one formwork board may become higher than the upper end of the other formwork board, (c) is a type with the height of the upper end of the left and right formwork boards FIG. 2 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. FIG. FIG. 3 is a perspective view showing an example of a heat-insulating formwork having an L-shaped shape as seen from above, two types of E type and F type for the corner portion used in the embodiment.

  In this embodiment, as shown in FIG. 1, three types of heat insulating molds 10A, 10B, and 10C having different heights are basically used as discard molds for constructing underground beams. These are the linear heat insulation formwork 10A, 10B, 10C corresponding to the linear part where the underground beam extends linearly. In addition to these, heat-insulating molds 10E and 10F having an L-shaped shape as shown in FIG. 3 corresponding to a corner portion where the underground beam is bent in an L-shape are also used. Although not shown in FIGS. 1 and 3, a heat insulation mold 10 </ b> D (see FIG. 12) having a smaller height for height adjustment is also used as necessary.

  The heat insulating molds 10A, 10B, and 10C of types A, B, and C shown in FIG. 1 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 type A and C heat-insulating molds 10A and 10C so as not to open at least to the concrete placement space 16 side. In addition, the lower end surfaces of the heat insulation molds 10A, 10B, and 10C of the type A, B, and C are fitted into the fitting recesses 14 formed on the upper end surfaces of the lower heat insulation molds 10A and 10C. A fitting projection 15 to be fitted is formed. The reason why the fitting recess 14 is not formed on the upper end surfaces of the mold plates 11 and 12 of the type B heat insulation mold 10B is that the type B heat insulation mold 10B is arranged at the uppermost stage. It is because another heat insulation formwork is not stacked on the end face. Although not shown in the drawings, a type in which the fitting convex portion 15 is not formed may be prepared as the bottom arrangement in the heat insulating molds 10A, 10B, 10D and the like.

  As shown in FIG. 2, 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.

  The connecting member 13 is provided at a low position in the height direction of the mold plates 11 and 12, and a plurality of connecting members 13 are provided at regular intervals in the longitudinal direction of both the 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 underground beam 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 insulation mold 10A shown in FIG. 1 (a) has the same height at the upper ends of the left and right mold plates 11 and 12, and the type B shown in FIG. 1 (b). The heat-insulating mold 10B is set so that the upper end of one mold plate 11 is higher than the upper end of the other mold plate 12, FIG. 3 (c) shows the left and right mold plates 11, 12. The height of the upper end is set to be the same at a position lower than 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 heat insulation molds 10A, 10B, and 10C of types A, B, and C shown in FIGS. 1 (a), (b), and (c) are linear heat insulation corresponding to a straight portion in which the underground beam extends linearly. Although it is a formwork, two types of heat-insulating formwork 10E, 10F, bent into an L shape, are used at the corner where the underground beam bends in an L shape, as shown in FIG. Has been.

  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. The type E heat insulation formwork 10E is set to have the same height at the upper ends of the left and right formwork plates 11 and 12 in the same manner as the type A heat insulation formwork 10A. Similarly to the type B heat insulating mold 10B, the heights of the upper ends of the left and right mold plates 11 and 12 are set to be different.

  Further, as shown in FIG. 3, 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 heat insulating form 10E of type E, 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 mold 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. This is because when the type F heat insulation mold 10F is stacked on the type E heat insulation mold 10E, the positions of both ends of the lower heat insulation mold 10E and the positions of both ends of the upper heat insulation mold 10F (that is, This is for shifting the connection position with other linear type heat insulation formwork.

  As shown in FIGS. 10 and 11, for example, the foundation structure using the heat insulation form of the embodiment is formed by integrally forming the underground beams 2, 3 and the pressure plate 1, and the heat insulation form described above. 10A, 10B, 10C, 10E, and 10F are used as the discarded formwork of the underground beams 2 and 3, and the reinforcing rods 37, 40, and 41 for the underground beams are provided inside the heat insulating formwork 10A, 10B, 10C, 10E, and 10F. , 42 are arranged, and the reinforcing bars 44 of the pressure plate 1 are arranged on the upper side of the heat insulation molds 10B and 10F and the heat insulation form 45 under the pressure plate, and then the concrete 100 is placed thereon. Yes.

  In this case, as one of the underground beams 2 and 3, an outer peripheral underground beam 2 located on the lower side of the outer periphery of the pressure-resistant plate 1 is provided, and heat insulating molds 10B and 10F for constructing the outer peripheral underground beam 2 are provided. The mold that forms the outer peripheral end face of the pressure-resistant plate 1 is formed such that the upper end of the mold plate 11 on the outer peripheral side is formed to be higher than the mold plate 12 on the inner peripheral side by the thickness of the pressure-resistant plate 1 or more. It is also used as a frame.

  Further, when the extending direction of the underground beams 2 and 3 is the longitudinal direction of the heat insulating molds 10A, 10B, 10C, 10E, and 10F, a large number of the heat insulating molds 10A, 10B, 10C, 10E, and 10F are connected in the longitudinal direction. Has been. In addition, the upper thermal insulation molds 10B and 10F are stacked on the lower thermal insulation molds 10A and 10E in accordance with the required beam formation of the underground beams, and the lengths of the upper thermal insulation molds 10B and 10F are stacked. The connection positions in the direction and the connection positions in the longitudinal direction of the lower heat insulating molds 10A and 10E are stacked so as to be shifted in the longitudinal direction. In addition, linear heat insulating molds 10A, 10B, and 10C are arranged in the straight portions where the underground beams 2 and 3 extend in a straight line, and the L-shaped heat insulating molds are formed in the corner portions bent in an L shape. 10E and 10F are arranged.

Next, the construction method of the foundation structure using the heat insulation formwork of embodiment is demonstrated.
First, generally speaking, in this construction method, the thermal insulation molds 10A, 10B, 10C, 10E, and 10F are installed at the construction sites of the outer underground beam 2 and the inner underground beam 3, and the thermal insulation mold 10A, Reinforcing bars 37, 40, 41, and 42 for the outer peripheral underground beam 2 and the inner underground beam 3 are arranged inside 10B, 10C, 10E, and 10F, and then the heat insulating molds 10A, 10B, 10C, 10E, and 10F By placing the reinforcing bar 44 of the pressure plate 1 on the upper side of the plate and the heat insulation form 45 under the pressure plate and placing concrete 100 thereon, the outer underground beam 2 and the inner underground beam 3 and the pressure plate 1 are placed. A basic structure using a heat-insulated formwork is built.

Hereinafter, a specific construction procedure will be described with reference to FIGS.
First, as shown in FIGS. 4 (a) and 4 (b), root excavation and crushed stone ground work are performed on the construction site of the outer peripheral underground beam. That is, the groove 31 is dug in the ground, the gravel 32 is laid in the groove 31, and the discarded concrete 33 is placed thereon. Next, inking 34 for installing the heat insulating mold is performed, and a plastic angle 35 for fixing the insulating mold is installed along the inking 34. In addition, a spacer block 36 is installed to secure the concrete cover thickness, and a lower end reinforcing bar (lower end main reinforcing bar) 37 is arranged in a state where the spacer block 36 is lifted from the discarded concrete 33 by a certain distance. Reference numeral 38 denotes a temporary anchor muscle for supporting the longitudinal muscle.

  Next, as shown in FIG. 5, a type A heat insulating mold 10 </ b> A is installed for the first-stage straight line portion. Moreover, the type E heat insulation formwork 10E shown in FIG. 3 is installed about the corner part of an underground beam. In addition, for the T-shaped portion and the cross portion of the underground beam, the form plates 11 and 12 of the type A heat insulating form 10A are appropriately cut and opened, and the heat insulating form 10A that intersects the edge of the opening. The end portions of the mold plates 11 and 12 are connected. When the first-stage heat-insulating molds 10A and 10E are installed, the assembly of the molds proceeds in order starting from the corners, T-shaped parts, and crosses. Similarly, as shown in FIG. 10, as for the construction site of the internal underground beam, root excavation and crushed stone ground are performed, and the heat insulating formwork 10C is installed.

  Next, the vertical bar 40 is attached to the temporary anchor bar 38, the intermediate horizontal bar 41 is arranged with respect to the vertical bar 40, and the vertical bar 40, the intermediate horizontal bar 41, and the lower end reinforcing bar 37 are bound to make the vertical bar 40 independent. . The same work is performed in parallel for the underground underground beams.

  Next, as shown in FIG. 6, the second-stage heat-insulating molds 10B and 10F are stacked on the first-stage heat-insulating molds 10A and 10E. The starting position of the product stage is the same as the first stage. When stacking the second-stage heat-insulating molds 10B and 10F, the fitting protrusions 15 formed on the lower end surfaces of the own mold-plates 11 and 12 are used as the mold-plates 11 and 12 of the lower-stage heat-insulating molds 10A and 10E. It fits in the fitting recessed part 14 formed in the upper end surface. Thereby, it is possible to stack without gaps and without deviation.

  Moreover, since it is a formwork for outer periphery underground beams, the higher formwork board 11 is located in an outer peripheral side, and heat insulation formwork 10B, 10F is piled up. At this time, as shown in FIG. 7, the heat insulation mold 10 </ b> A of the straight portion is stacked by stacking the type F heat insulation mold 10 </ b> F on the type E heat insulation mold 10 </ b> E in which the lengths of both sleeves are reversed. 10B in the longitudinal direction is shifted between the upper and lower stages.

  When the assembly of the second-stage heat insulation molds 10B and 10F is completed in the above manner, as shown in FIG. 8, internal backfilling, crushed stone, and sand land business are performed (portion indicated by reference numeral 43). In addition, a heat insulating form-frame reinforced fiber strand pressure-resistant under-pressing form 45 is installed on the pressure-resistant plate construction surface. 9A and 9B, a slab reinforcing bar 44 is arranged on the pressure-resistant plate under heat insulation form 45, and the end of the reinforcing bar 42 is connected to the underground beam. Are inserted into the heat insulating molds 10A and 10B. Further, as shown in FIG. 10, a crosspiece 51 is attached to the upper end of the heat insulating form 10 </ b> B (10 </ b> F) of the outer peripheral underground beam 2, and a hook 52 of the crosspiece 51 is provided. Furthermore, the hole down anchor bolt support bracket 53 is attached using the crosspiece 51. Moreover, in this embodiment, before installing the pressure-resistant plate-shaped heat insulation formwork 45, the polyethylene film 60 (refer FIGS. 10-12) is laid on the upper surface of the crushed stone 43, and the pressure-resistant plate type heat insulation formwork 45 is then laid. It is installed. By laying the polyethylene film 60 in this way, the discarded concrete can be omitted, and the construction period and cost can be reduced. 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. Moreover, it is good also as a structure which lays the polyethylene film 60 on the upper surface of the gravel 32 (refer FIG. 4), and abbreviate | omits casting concrete 33.

  Next, the base top end level ink is provided below the top top end of the heat insulating form 10B (10F) of the outer periphery underground beam 2, and the top end level iron holding difference bar is provided within the mass of the slab reinforcing bar 44. Anchor bolts are provided on the pressure plate 1 and the underground beams 2 and 3 as necessary.

  In this state, concrete 100 is placed as shown in FIG. At that time, the mold plate 11 on the outer peripheral side of the second-stage heat-insulating mold 10 </ b> B (10 </ b> F) functions as a mold on the outer peripheral end face of the pressure-resistant plate 1. The cast concrete 100 is filled in the heat insulating molds 10A, 10B, 10E, 10F, and 10C, and is filled on the pressure-resistant plate heat insulating mold 45. Finally, the top surface of the concrete 100 is leveled with a trowel, the remaining material is processed and leveled, and the foundation work is completed.

  As a result, as shown in FIG. 13, a foundation structure in which the pressure plate 1, the outer peripheral underground beam 2 and the inner underground beam 3 are integrated is completed. In this basic structure, since the heat insulating molds 10A, 10B, 10C, 10E, and 10F and the pressure-resistant under-frame heat insulating mold 45 are left as the discarded molds, it becomes possible to improve the heat insulating properties under the floor of the building. .

  According to the basic structure using the heat insulating form described above, since the connecting members 13 of the heat insulating form 10A, 10B, 10C, 10E, 10F used are made of metal, sufficient connection strength can be obtained even with a small cross-sectional area. Can be demonstrated. Moreover, since both ends of the connecting member 13 are embedded and fixed in the mold plates 11 and 12 made of the synthetic resin foam, the bonding strength between the mold plates 11 and 12 and the connecting member 13 can be sufficiently exhibited. it can. Therefore, both mold frame plates 11 and 12 can be securely held at a predetermined interval, and there is no fear that the heat insulating mold frames 10A, 10B, 10C, 10E, and 10F are damaged during construction, and the construction quality is improved. it can. Further, since the cross-sectional area of the connecting member 13 can be small, the placement volume of the concrete 100 can be as large as possible, and high concrete strength can be ensured. Moreover, according to this foundation structure, since the underground beams 2 and 3 and the pressure-resistant plate 1 can be constructed by one concrete placement, the construction can be facilitated.

  Moreover, since the upper end part of the mold plate 11 outside the heat insulating molds 10B and 10F for forming the outer peripheral underground beam 2 is also used as the mold forming the outer peripheral end face of the pressure plate 1, the pressure plate 1 It is no longer necessary to construct a separate outer formwork, making it easier to construct the formwork and improving workability.

  In addition, since the connection positions of the upper thermal insulation molds 10B and 10F and the connection positions of the lower thermal insulation molds 10A and 10E are shifted, the upper thermal insulation molds 10B and 10F (lower thermal insulation molds 10A and 10E) The lower heat insulating molds 10A and 10E (upper heat insulating molds 10B and 10F) are connected to each other, thereby connecting the upper and lower heat insulating molds 10B, 10F, 10A and 10E. It is possible to avoid a decrease in the assembly strength of the mold due to the overlapping positions, and it is difficult to form an unnecessary gap between the molds, thereby contributing to an improvement in construction quality.

  Moreover, since the linear heat insulation formwork 10A, 10B and the L-shaped heat insulation formwork 10E, 10F are prepared in advance and the underground beam formwork is constructed, it is possible to facilitate the formwork construction.

  Moreover, according to the construction method described above, the underground beams 2 and 3 are constructed using the heat insulating molds 10A, 10B, 10C, 10E, and 10F that can exhibit sufficient strength while increasing the placement volume of the concrete 100. Thus, high concrete strength can be ensured and construction quality can be improved. In addition, since the underground beams 2 and 3 and the pressure plate 1 can be constructed by a single concrete placement, the construction can be facilitated.

  In the above-described basic structure, the case where the type A heat insulation formwork 10A is installed in the first stage and the type B heat insulation formwork 10B is stacked thereon as the second stage is shown. The foundation may be constructed by stacking the heat insulating molds 10A, 10B, 10E, and 10F in more stages. For example, as shown in FIG. 12, a type C heat insulation mold 10C is placed on a heat insulation mold 10D having a minimum height that functions as a spacer, and a type A heat insulation mold 10A is placed on two stages thereon. Finally, a type B heat-insulating form 10B may be placed to construct a tall outer peripheral underground beam 4. When constructing a bathroom floor or wall, the uppermost mold may be a type A heat insulation mold 10A. Further, the floor slab may be constructed by placing concrete on both outer sides of the mold constructed with the heat insulating molds 10A, 10B, 10E, and 10F.

  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.

1 Pressure-resistant plate 2 Outer perimeter underground beam 3 Internal underground beam
10A, 10B, 10C, 10E, 10F Insulation formwork (first insulation formwork)
10G, 10H, 10I, 10K, 10L heat insulation formwork (second heat insulation formwork)
11, 12 Formwork plate 13 Connecting member 16 Concrete placement space 37 Bottom rebar (underground beam rebar)
40 Longitudinal bars (reinforcing bars for underground beams)
41 Intermediate rebar (reinforcement of underground beam)
42 Top bar (reinforcement of underground beam)
44 Slab Reinforcement (pressure-resistant version)
45 Insulation form under pressure-resistant plate 100 Concrete

Claims (5)

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 for underground beams,
Concrete is cast after reinforcing bars for underground beams are arranged inside the heat insulation formwork, and the pressure bar reinforcements are placed above the heat insulation formwork and above the heat insulation formwork under pressure plate. The underground beam and the pressure plate are built in one piece ,
The connecting member has a web part that bridges the two mold plates, and a flange part that is bent at right angles to both ends of the web part,
A notch is formed in the center of the web part,
A first heat-insulating formwork in which the connecting member is disposed so that the cutout faces downward;
A second heat insulating formwork in which the connecting member is disposed so that the notch faces upward,
A base structure using a heat-insulating formwork, wherein the second heat-insulating formwork is arranged at the lowermost stage .   As one of the underground beams, an outer peripheral underground beam positioned below the outer periphery of the pressure-resistant plate is provided, and the form plate on the outer peripheral side of the heat insulating form for constructing the outer peripheral underground beam The upper end is formed to be higher in dimension than the thickness of the pressure plate than the mold plate on the inner peripheral side, so that it is also used as a mold for forming the outer peripheral end surface of the pressure plate. The foundation structure using the heat insulation formwork of Claim 1.   When the extending direction of the underground beam is the longitudinal direction of the heat insulating mold, a number of the heat insulating molds are connected in the longitudinal direction and stacked in the vertical direction, and the longitudinal direction of the upper heat insulating mold The base structure using the heat insulating formwork according to claim 1, wherein the connection position of the heat insulation form and the connection position in the longitudinal direction of the heat insulation formwork of the lower stage are shifted in the longitudinal direction.   The linear heat insulation form corresponding to the straight part where the underground beam extends linearly and the L shape heat insulation form corresponding to the corner part where the underground beam bends in an L shape are used. The linear heat-insulating formwork is disposed in the straight part, and the L-shaped heat-insulating formwork is disposed in the corner part. Basic structure using heat insulating formwork. 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. By installing 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 at a construction site of an underground beam, By placing the reinforcing bars for underground beams inside, and then placing the pressure-resistant plate reinforcing bars on the upper side of the heat-insulating form and on the upper side of the pressure-resistant under-pressing form, and placing concrete thereon, Build a foundation that combines underground beams and pressure plates ,
The connecting member has a web part that bridges the two mold plates, and a flange part that is bent at right angles to both ends of the web part,
A notch is formed in the center of the web part,
A first heat-insulating formwork in which the connecting member is disposed so that the cutout faces downward;
A second heat insulating formwork in which the connecting member is disposed so that the notch faces upward,
A method for forming a pressure-resistant plate-type soil foundation, characterized in that the second heat-insulating formwork is disposed at the lowest level .

Images