JP7273450B1 - Foundation formwork structure and foundation formwork construction method - Google Patents

Abstract

[PROBLEMS] To provide a foundation structure that eliminates the need to cast discarded concrete and realizes further simplification of foundation work. SOLUTION: A crushed stone layer 150 provided on the ground, a resin block layer 151 provided on the crushed stone layer 150, having a flat upper surface and having a lower specific gravity than the ground, and a sheet layer covering the upper surface of the resin block layer 151. 152, a resin plate layer 153 provided on the sheet layer 152, and a plurality of first forms fixed to the upper surface of the resin plate layer 153 with an adhesive 156 so as to form an outer peripheral rising portion 157. A support 100, a plurality of second formwork supports 200 fixed to the upper surface of the resin plate layer 153 with an adhesive 156 so as to form an internal rising portion 257, and a first formwork support 100. or a base formwork structure comprising a plurality of formwork panels 110 , 120 , 220 supported by a second formwork support 200 . [Selection diagram] Fig. 1

Description

The present invention relates to a foundation formwork structure and a foundation formwork construction method for a building that enables foundation work to be carried out by a simple method.

Conventionally, as a foundation formwork support tool for a building that allows foundation work to be carried out by a simple method, a formwork height-adjustable structure that eliminates the need to cast concrete has been proposed (Patent document 1, Patent Document 2, Patent Document 3). In addition, a formwork support has been proposed that facilitates construction work and shortens the construction period (Patent Document 4).

JP-A-2000-179152 Japanese Utility Model Laid-Open No. 59-22855 Japanese Utility Model Laid-Open No. 60-170455 Japanese Patent No. 6757997

Against the backdrop of soaring raw material prices and the aging of skilled workers, further reductions in materials and simplification of construction are required. In view of this, it is an object of the present invention to provide a foundation formwork structure and a foundation formwork construction method that eliminates the need to place dump concrete and further facilitates foundation work.

A crushed stone layer provided on the ground;
a resin block layer provided on the crushed stone layer, having a flat upper surface and having a lower specific gravity than the ground;
a sheet layer covering the upper surface of the resin block layer;
a resin plate layer provided on the sheet layer;
a plurality of first formwork supports fixed to the upper surface of the resin plate layer with an adhesive so as to form an outer periphery rising portion;
a plurality of second formwork supports fixed to the upper surface of the resin plate layer with an adhesive so as to form an internal raised portion;
a plurality of formwork panels supported by said first formwork support or said second formwork support;
with
the ground surface is at a level between the bottom and top edges of the formwork panels;
The form panel is a steel panel,
The basic formwork structure is such that the lower part of the steel panel outside the outer periphery rising part is buried in the ground before concrete is placed .

providing a crushed stone layer on the ground;
providing a resin block layer having a flat upper surface and having a lower specific gravity than the ground on the crushed stone layer;
a step of covering the upper surface of the resin block layer with a sheet layer;
providing a resin plate layer on the sheet layer;
a step of fixing a plurality of first formwork supports to the upper surface of the resin plate layer with an adhesive so as to form an outer periphery rising portion;
a step of fixing a plurality of second formwork supports to the upper surface of the resin plate layer with an adhesive so as to form an internal rising portion;
causing the first formwork support or the second formwork support to support a steel panel as a formwork panel;
burying the lower part of the steel panel outside the outer perimeter rise in the ground until the surface of the ground reaches a height between the lower end and the upper end of the formwork panel before pouring concrete;
The foundation formwork method includes

According to the present invention, it is possible to provide a foundation formwork structure and a foundation formwork construction method that eliminate the need to place dump concrete and further facilitate foundation work.

It is a longitudinal cross-sectional view showing the formwork structure at the position of the outer periphery rising portion according to the embodiment of the present application. FIG. 2 is a schematic cross-sectional view of the foundation structure of the building according to the embodiment of the present application, showing a state after concrete is placed and the foundation is completed; It is a longitudinal cross-sectional view which shows the formwork structure of the internal rising part position which concerns on embodiment of this application. It is a flowchart which shows the procedure of the foundation formwork construction method which concerns on embodiment of this application.

Hereinafter, an embodiment of a foundation formwork structure for a building and a foundation formwork construction method according to the present invention will be described with reference to the drawings. Terms used in this embodiment are defined as follows. By "outside the first vertical member" is meant on the side of the first vertical member opposite the second vertical member. By "outside the first vertical member" is meant on the side of the first vertical member opposite the second vertical member. By "inside the second vertical member" is meant on the side of the second vertical member that faces the first vertical member. By "inside each second vertical member" is meant on the side of each second vertical member facing the opposing second vertical member. "Rise" means the foundation rise as part of the foundation formwork structure of a building. The "peripheral raised part" is a raised part along the outer periphery of the building, and is formed surrounding the outer periphery of the building. The "internal raised portion" is a raised portion formed inside the portion surrounded by the outer peripheral raised portion. The "adhesive" includes double-sided adhesive tape and paste adhesive.

A basic formwork structure and a basic formwork construction method for a building according to the present embodiment will be described with reference to FIGS. 1 to 3. FIG.

<<Outline of the basic formwork structure of the building according to the present embodiment>>
The outline of the foundation formwork structure of the building in this embodiment is as follows. First, at the bottom, it has a crushed stone layer 150 for stabilization of the ground surface. On top of the crushed stone layer 150, there is a resin block layer 151 having a flat upper surface and a lighter specific gravity than the ground for reducing the consolidation settlement of the ground immediately below and ensuring the bearing capacity of the building. A sheet layer 152 is provided on the resin block layer 151 to cover the upper surface of the resin block layer 151 . On the sheet layer 152, there is provided a resin plate layer 153 composed of one or more resin plates 153a having flat upper surfaces. On the upper surface of the resin plate layer 153, a plurality of first formwork supports 100 are arranged so that an outer periphery rising portion 157 is formed at the position of the outer periphery rising portion and fixed with an adhesive 156. . Similarly, on the upper surface of the resin plate layer 153, a plurality of second formwork supports 200 are arranged so that an internal rising portion 257 is formed at the position of the internal rising portion and fixed by an adhesive 156. have The plurality of first formwork supports and the plurality of second formwork supports 200 are supported in the direction of gravity by the respective formwork supports (100, 200), and the outer peripheral rising portion 157 or the inner rising portion 257 is It has a plurality of first formwork panels 110 and a plurality of second formwork panels 120 standing in the direction of gravity as formed. Each formwork panel (110, 120) has a plurality of width stops 130 for widthwise stopping each pair of each formwork panel (110, 120) from above. Each width stop 130 has a plurality of stiffeners 140 fitted into each width stop 130 .

<<Regarding the resin block layer of the present embodiment>>
<Basic configuration>
In this embodiment, the resin block layer 151 is composed of one or more resin blocks 151a having a flat upper surface made of resin. It is a structure in which underground water infiltrates into the block layer 151 . The resin block 151a can have the same configuration as that of Japanese Patent No. 4210312 or Japanese Patent No. 4967105.

<Specific configuration>
The resin block 151a is a rectangular parallelepiped skeletal member as a whole, and is a lightweight member formed with a large number of large and small openings. The resin block can be made of a recycled olefin-based resin, such as polypropylene, polyethylene, or a mixture thereof. The resin block layer 151 may be composed of one resin block 151a, or may be composed of a plurality of resin blocks 151a arranged side by side. Also, one or more resin blocks 151a may be arranged vertically to form a layer.

Since the resin block layer 151 has a lower specific gravity than the ground, it is possible to reduce the consolidation settlement of the ground immediately below and secure the bearing capacity of the building by replacing the ground. In addition, since the structure allows underground water to infiltrate, it is possible to prevent subsidence of the building due to liquefaction by taking in interstitial water into the resin block layer and preventing sand boiling due to water pressure in the event of an earthquake. Furthermore, since the upper surface is flat, the resin plate layer 153 can be set on the resin block, and the horizontal surface can be easily formed by the resin plate 153a. Then, only by sticking the bases (101, 201) of the formwork supports (100, 200) having bases having flat bottom surfaces onto the resin board layer 153 with an adhesive, the resin board layer 153 can be Each formwork support (100, 200) can be fixed and placed on top of it.

<<Regarding the formwork structure at the position of the outer peripheral rising portion of the present embodiment>>
<Basic configuration>
A formwork structure 1000 at the position of the outer periphery rising portion according to the embodiment and a first formwork support 100 used in this formwork structure 1000 will be described with reference to FIGS. 1 and 2 . FIG. 1 is a longitudinal sectional view showing a formwork structure 1000. FIG. FIG. 2 is a schematic cross-sectional view of the foundation formwork structure of the building according to the embodiment of the present application, showing a state after concrete is placed and the foundation is completed. In FIG. 2, the formwork supports (100, 200) and reinforcing bars that remain after the completion of the foundation are not shown. That is, FIG. 1 shows a set of formwork structures at the position of the outer perimeter rising portion of FIG. 2 before concrete is placed.

In this embodiment, each first formwork support 100 includes a first base 101 having a flat bottom surface, a first vertical member 102 extending upward from the first base 101, and a first base a second vertical member 103 extending upward from 101 and a first horizontal member 104 spanning between the first vertical member 102 and the second vertical member 103; 103 includes first unlocking means 105 capable of switching between a locked state and a unlocked state of the first horizontal member 104 with respect to the second vertical member 103 , and the first base 101 is connected to the first vertical member 102 The first horizontal member 104 includes a first panel support 106 that vertically supports one first formwork panel 110 outside the second vertical member 103 and one second vertical member 103 . The first form panel 110 and the second form panel 120 are supported so as to be substantially parallel to each other.

Each width stopper 130 serves to width-stop from above one first formwork panel 110 and one second formwork panel 120 supported by each first formwork support 100. , a main portion 131, and a pair of reinforcing member holding portions 132 fixed to the ends of the main portion 131 and holding a pair of reinforcing members 140 in the longitudinal direction of the rising portion.

The first formwork panel 110 is positioned at the outermost periphery of the outer periphery rising portion 157 . That is, one first formwork support 100 supports one first formwork panel 110 at the outermost peripheral position of the outer peripheral rising part 157, and one second formwork panel 110 on the inner side of the outer peripheral rising part 157. Supports frame panel 120 . One first formwork panel 110 and one second formwork panel 120 pair may be supported by a plurality of first formwork supports 100 at perimeter risers 157 . Also, one width stopper 130 width-stops a pair of one first formwork panel 110 and one second formwork panel 120 at the outer periphery rising portion 157 . One first formwork panel 110 and one second formwork panel 120 pair may be width-stopped at the perimeter riser 157 by a plurality of width stops 130 . Also, the ground surface GL is positioned between the lower end and the upper end of each first formwork panel 110 . Both the first formwork panel 110 and the second formwork panel 120 may be steel panels.

<Specific configuration>
The formwork structure 1000 is used to build the base concrete 155 and the perimeter riser 157 that supports the outer walls. The formwork structure 1000, as shown in FIG. material 140; The first formwork support 100 includes a first base 101 that is long in the horizontal direction of FIG. 1, a first vertical member 102 that is long in the direction of gravity, a second vertical member 103 that is long in the direction of gravity, and a horizontal It has a long first horizontal member 104 and a first unlocking means 105 .

The first base 101 of the first mold support 100 is formed of a member having a flat bottom surface. At the end of the first base portion 101 on the first vertical member 102 side, a bent end portion 101 a that is bent upward and faces the first vertical member 102 is formed. A temporary fixing hole 101b penetrating the first base 101 in the longitudinal direction is formed substantially in the center of the bent end 101a.

A first vertical member 102 of the first mold support 100 is fixed at its lower portion to the first base portion 101 and extends linearly upward. The first vertical member 102 is formed of a plate-like member, and has a substantially U-shaped cross section taken perpendicularly to the longitudinal direction. A lower portion of the first vertical member 102 forms a first fixed portion 102a bent toward the second vertical member 103 side. The first fixing portion 102a is fixed to the first base portion 101 by, for example, rivets. The first vertical member 102 is formed with a slit (not shown) that penetrates in the longitudinal direction of the first base portion 101 and is elongated in the vertical direction. Both side surfaces extending in the longitudinal direction of the slit are formed in a corrugated shape. Scales (not shown) arranged at equal intervals in the vertical direction are displayed on both sides of the slit. Note that the first formwork support and the second formwork support are the same as those described in Patent Document 4 (Japanese Patent No. 6757997), so detailed drawings are omitted.

The second vertical member 103 of the first formwork support 100 has the same configuration as the first vertical member 102 and is fixed to the first base 101 opposite the first vertical member 102 . ing. The first vertical member 102 and the second vertical member 103 are arranged at positions separated from both ends of the first base 101 in the longitudinal direction of the first base 101 .

A first horizontal member 104 spans between the first vertical member 102 and the second vertical member 103 . The first horizontal member 104 is mainly formed of a plate-like member extending horizontally. The first horizontal member 104 has a projecting piece 104a projecting upward from the vicinity of the second vertical member 103. As shown in FIG. The first horizontal member 104 has a first end on the first vertical member 102 side and a second end on the second vertical member 103 side. The first end is bent at a right angle toward the first base 101 and arranged along the first vertical member 102 . The second end is also bent at right angles to the first base 101 side and arranged along the second vertical member 103 . The first end is secured to the first vertical member 102 by, for example, a rivet. The height of the first end can be set according to the height of the lower end of the second formwork panel 120 . The second end is secured to the second vertical member 103 by the first unlocking means 105 .

The first unlocking means 105 can switch between a locked state and a unlocked state of the second end. By releasing the fixation of the second end, the portion of the first horizontal member 104 on the side of the second vertical member 103 is moved up and down within the range in which the first horizontal member 104 is elastically deformed. position can be fixed. As the first unlocking means 105, for example, a mechanism for tightening the second vertical member 103 using a member passing through a slit formed in the second vertical member 103 can be adopted. A tightening mechanism using an inclined cam or the like can be used.

In the formwork structure 1000, the first formwork support 100 is installed on the upper surface of the resin plate 153a of the resin plate layer 153, as shown in FIG. The first form support 100 is positioned so that the first vertical member 102 is outside the building and the second vertical member 103 is inside the building. The first formwork support 100 is fixed to the upper surface of the resin plate 153 a of the resin plate layer 153 with an adhesive 156 . Details of the adhesive 156 will be described later. When the portion of the resin plate 153a on which the first formwork support 100 is installed is inclined, the first horizontal member 104 is unlocked by the first unlocking means 105 so that the height can be easily adjusted. can be adjusted.

A plurality of first formwork supports 100 are installed at predetermined intervals. After installing the first formwork support 100, the erection of the first formwork panel 110, the arrangement of the reinforcing bars 154, and the erection of the second formwork panel 120 are carried out in this order. The first formwork panel 110 and the second formwork panel 120 are erected because the first formwork support 100 serves to position the first formwork panel 110 and the second formwork panel 120 . can be easily done. The first formwork panel 110 and the second formwork panel 120 may be sacrificial forms and remain after the building is completed. As a result, the dismantling work of the formwork is not required, and the strength of the outer peripheral raised portion 157 can be increased. As the first formwork panel 110 and the second formwork panel 120, for example, steel panels can be employed.

Compared to plywood or wooden forms, steel panels are more resistant to weathering and deterioration, and are highly durable. In addition, since there is no waste material, the disposal cost can be reduced, the number of trucks can be reduced, and in addition, the reduction of environmental destruction and the reduction of carbon dioxide can be achieved.

It is desirable that the steel panel has a corrugated shape, with unevenness extending in the direction of gravity and functioning as ribs (reinforcing ridges). By making the steel plate panel wavy, it can be thinner than the formwork panel such as plywood, for example, with a plate thickness of 0.4 mm, and the weight is reduced to about 1/3 compared to the formwork panel such as plywood. It is possible to realize light weight and strength at the same time. As a result, transportation costs can be further reduced, and the construction period can be shortened by making work easier and more efficient. As a material for the steel plate panel, it is desirable to use a hot-dip galvanized steel plate. A hot-dip galvanized steel sheet has the characteristic of being less expensive than, for example, stainless steel and being resistant to rust. Therefore, it is suitable as a material for the first formwork panel 110 and the second formwork panel 120 for use as a discard formwork in this embodiment. In the present invention, it is not a necessary condition that both the first formwork panel 110 and the second formwork panel 120 are steel panels as long as they can achieve the necessary strength and durability as formwork panels. not. For example, either the first formwork panel 110 or the second formwork panel 120 may be made of a heat insulating material depending on the needs of the external environment. Insulation also serves as a formwork panel during concrete pouring.

The lower part of the first formwork panel 110 is positioned between the first vertical member 102 of the first formwork support 100 and the bent end 101a via the first lower rail 111 extending in the depth direction of FIG. , and placed on the end of the first base 101 on the side of the first vertical member 102 . The end of the first base portion 101 on the first vertical member 102 side constitutes a first panel support portion 106 . The lower portion of the first formwork panel 110 may be temporarily fixed to the first formwork support 100 by means of temporary fixing means. As the temporary fixing means, for example, screws, nails, or the like that are driven into the lower portion of the first form panel 110 through the temporary fixing holes 101b can be employed. The first lower rail 111 is provided over the entire horizontal length of the first formwork panel 110 . A cross section perpendicular to the longitudinal direction of the first lower rail 111 is generally U-shaped over its entire length. The lower part of the second formwork panel 120 is sandwiched between the second vertical member 103 and the projecting piece 104a of the first formwork support 100 via the second lower rail 121 to form the first horizontal panel. It rests on member 104 . A portion of the first horizontal member 104 on the side of the second vertical member 103 constitutes a second panel support portion 107 . The second lower rail 121 has the same shape as the first lower rail 111 . Width stoppers 130 are attached to the upper portions of the first formwork panel 110 and the second formwork panel 120, as shown in FIG.

The width stopper 130 is made of a metal plate material and has a rectangular main portion 131 and a pair of reinforcing member holding portions 132 provided at both ends of the main portion 131 .

The pair of reinforcing member holding portions 132 is formed of a metal plate, and each has a substantially U shape when viewed in the lateral direction of the main portion 131 . The pair of reinforcing member holding portions 132 are coupled to the end portion of the main portion 131 at their upper end portions on the side of the main portion 131 . Through holes 141a are formed in the center of the portion of the reinforcing member holding portion 132 on the side opposite to the main portion 131 so as to penetrate in the plate thickness direction.

As shown in FIG. 1, the width stop 130 is installed between the first formwork panel 110 and the second formwork panel 110 via a pair of upper rails 112 between the reinforcing member holding portion 132 and the protrusion 131b, respectively. This can be easily done by sandwiching the upper part of the formwork panel 120 and placing it on the pair of upper rails 112 . Each of the pair of upper rails 112 has a U-shaped cross section perpendicular to the longitudinal direction over the entire length. The width stopper 130 can be easily fixed by driving a pair of temporary fasteners 134 a into the pair of upper rails 112 through a pair of holes formed in the main portion 131 . Nails and screws, for example, can be used as the temporary fasteners 134a. A plurality of width stoppers 130 are arranged at predetermined intervals in the longitudinal direction of the outer periphery rising portion 157 .

After fixing the width stopper 130 , one reinforcing member 140 is fitted to each of the pair of reinforcing member holding portions 132 . The reinforcing member 140 is an elongated member, and as the reinforcing member 140 arranged along the longitudinal direction of the outer peripheral rising portion 157, for example, a crosspiece, a steel pipe, or the like can be used. Temporary fixing of each reinforcing member 140 can be easily performed by driving a temporary fixing member 141 a into the reinforcing member 140 through a through hole portion 132 a formed in each reinforcing member holding portion 132 . For example, a nail, a screw, or the like can be used as the temporary fixing member 141a. By providing a pair of stiffeners 140, the formwork structure 1000 can be made to flow better and be more rigid.

When the formwork structure 1000 described above is employed, the main reinforcement 161 of the outer peripheral rising portion 157 can be held by suspension members 140a suspended from the width stoppers 130, as shown in FIG. For example, an S can can be used as the suspension member 140a. In addition, in the formwork structure 1000, when steel panels, for example, are adopted as the first formwork panel 110 and the second formwork panel 120, even if the abdominal muscles and the bottom muscles of the outer circumference riser 157 are not provided, the outer circumference rise The strength required for the portion 157 can be ensured. As a result, it is possible to shorten the construction period for arranging the reinforcing bars of the outer peripheral rising portion 157 and save labor. In particular, when a steel panel is used as the first formwork panel 110, it is possible to avoid the risk of ingress of water and insects such as termites due to cracks that occur due to aged deterioration of the outermost periphery of the rising portion 157.

Also, according to the formwork structure 1000 , the first formwork panel 110 is positioned on the upper surface of the resin board layer 153 by the first base 101 , and the second formwork panel 120 is arranged on the first formwork support 100 . is supported by the first horizontal member 104 and arranged so as to float from the resin plate layer 153 . Therefore, it is possible to place concrete for the base concrete 155 and the outer periphery rising portion 157 at the same time. As a result, it is possible to shorten the construction period and facilitate the construction work for placing and curing concrete. In addition, there is no seam between the bottom concrete 155 and the outer peripheral rising portion 157, and the risk of intrusion of water and insects such as termites can be avoided.

In this embodiment, as shown in FIG. 2, the ground surface GL is positioned between the lower end and the upper end of each first formwork panel 110 . Since it is not necessary to dismantle the formwork when steel panels are used, after piping that penetrates the steel panel and the outside of the formwork structure below the ground surface GL, the outer periphery is backfilled. Concrete can be poured. Such backfilling makes it possible to simply reinforce the formwork.

Generally, in foundation work, it is necessary to embed anchor bolts for fixing the foundation in each raised portion. However, the structural relationship between the anchor bolts and the formwork structure 1000, the means for fixing the anchor bolts to each formwork structure before concrete is placed, etc., are not part of the present invention, and therefore need not be described. omitted.

<<Regarding the formwork structure at the position of the internal rising portion of the present embodiment>>
<Basic configuration>
Next, the configuration of the formwork structure 2000 at the position of the internal upright portion will be described with reference to FIGS. 2 and 3. FIG. FIG. 3 is a longitudinal sectional view showing the formwork structure 2000. As shown in FIG. FIG. 3 shows the formwork structure before concrete is placed at the position of the internal riser 257 in FIG.

In this embodiment, each second formwork support 200 includes a second base 201 having a flat bottom surface, a pair of third vertical members 203 extending upward from the second base 201, and a pair of and a second horizontal member 204 spanned between the third vertical members 203, each third vertical member 203 being a fixed state of the second horizontal member 204 with respect to the third vertical member 203. and second unlocking means 205 switchable between and unlocked states, wherein the second horizontal members 204 move each one of the second formwork panels 220 parallel to each other inside each third vertical member 203. It includes a pair of third panel supports 207 for vertical support such that the

Each width stop 130 serves to stop the width of the pair of second formwork panels 120 supported by each second formwork support 200 from above. It has a pair of stiffener retainers 132 each fixed to the end of the main section 131 that retains the material 140 in the longitudinal direction of the riser. A single second formwork support 200 supports a pair of second formwork panels 120 at internal risers 257 . A pair of second formwork panels 120 may be supported by a plurality of second formwork supports 200 at internal risers 257 . One width stop 130 width stops the pair of second formwork panels 120 at the inner raised portion 257 . A pair of second formwork panels 120 may be width-stopped by a plurality of width-stops 130 at internal risers 257 . The second form panel 120 may be a steel panel.

<Specific configuration>
Since the formwork structure 2000 has a lot in common with the formwork structure 1000 described above, the parts corresponding to the parts of the formwork structure 1000 that have been described with reference numerals have been used in the description of the formwork structure 1000. Reference numerals obtained by adding 100 to the reference numerals are attached, and overlapping descriptions are omitted. For example, the second horizontal member of formwork structure 2000 corresponding to the first horizontal member 104 of formwork structure 1000 is labeled "204".

Formwork structure 2000 differs from formwork structure 1000 in that it is used to construct internal risers 257 that support the interior walls of a building. In the formwork structure 2000 , both of the pair of second formwork panels 120 are supported by the second horizontal members 204 of the second formwork supporters 200 and arranged to be lifted from the resin plate layer 153 .

The formwork structure 2000 differs from the formwork structure 1000 in that it has a bilaterally symmetric structure as shown in FIG. However, the side of the formwork structure 1000 shown in FIG. 1 (the left side, ie, the side of the second formwork panel 120) and the left side of FIG. 3 are of identical construction. Therefore, the detailed structure is the same as that of the second formwork panel 120 side in the formwork structure 1000 except for the existence of the suspension members of the width stoppers and the structure of the reinforcing bars, so the explanation is omitted.

As with the formwork structure 1000, a steel panel, for example, can be employed as the second formwork panel 120, but the shape and material of the steel panel are the same as those of the formwork structure 1000. . However, in the present invention, it is not a necessary condition that the second formwork panel 120 is a steel panel as long as it can achieve the required strength and durability as a formwork panel.

According to the present formwork structure 2000, the concrete for the base concrete 255 and the concrete for the inner rising portion 257 can be cast at once, and the inner rising portion 257 for supporting the inner wall of the building can be easily constructed in a short construction period. Since the members constituting the formwork structure 2000 are common to the formwork structure of the formwork structure 1000 except for the first formwork support 100, they can be suitably used together with the formwork structure 1000.

<<About the adhesive of this embodiment>>
<Basic structure>
The flat bottom surface of each base of each formwork support (100, 200) is fixed to the upper surface of the resin plate layer 153 with an adhesive 156, and each formwork support (100, 200) is attached to each formwork panel (110). , 120), the width stopper 130, and the reinforcing member 140.

<<Regarding the positional relationship between the upper surface of the base concrete of this embodiment and the ground surface>
<Basic structure>
In this embodiment,
The upper surface of the bottom concrete 155 can be positioned lower than the ground surface GL.

<Description of this structure>
In the conventional technology, if the top surface of the bottom concrete is lower than the ground surface, there is a risk of water inundation in that area. However, the volume of the space below the height of the ground surface replaces the ground with zero weight and has the effect of reducing consolidation settlement. There is a trade-off between securing.

In this embodiment, as described above, the bottom concrete 155 and the concrete of the outer peripheral rising portion 157 in the formwork structure 1000 are placed simultaneously, and the effect of preventing flooding can be expected. It is possible to make it lower to secure space for mitigating consolidation settlement.

<Sheet layer of the present embodiment>
A sheet layer 152 is placed over the upper surface of the resin block layer, as described above. The sheet layer 152 preferably has a waterproof property because the resin block layer 151 has a structure in which underground water infiltrates into the resin block layer 151 when the water level in the ground rises.

<Resin plate layer>
As described above, the resin plate layer 153 is composed of one or more resin plates 153 a having a flat upper surface and placed on the upper surface of the sheet layer 152 . The resin plate layer 153 is formed by arranging a plurality of resin plates 153a only at necessary positions (for example, each rising portion (157, 257), etc.), and the resin plate layer 153 is not formed at unnecessary positions. Also good.

As the resin material, for example polypropylene, a resin that is rigid, scratch resistant, has a high deflection temperature under load, and has excellent chemical stability (chemical resistance), water resistance, and insulation properties is adopted. It is desirable to Polypropylene is preferable because it has a specific gravity of 0.91 and is lightweight and inexpensive. Polypropylene is also preferable because it is lighter than, for example, polyethylene, has excellent strength, and has a high melting point.

<Foundation formwork method>
Next, the basic formwork construction method according to the embodiment of the present application will be described with reference to FIG. The basic formwork construction method includes step S1 of providing a crushed stone layer 150 on the ground, step S2 of providing a resin block layer 151 having a flat upper surface and a lower specific gravity than the ground on the crushed stone layer 150, and step S2 of forming the resin block layer 151. step S3 of covering the upper surface with the sheet layer 152; step S4 of providing the resin plate layer 153 on the sheet layer 152; Step S5 of fixing the formwork support 100 with an adhesive 156, and fixing a plurality of second formwork supports 200 to the upper surface of the resin plate layer 153 with an adhesive so as to form an internal rising portion 257. Step S6 and step S7 of causing the first formwork support 100 or the second formwork support 200 to support the formwork panels 110, 120, 220. FIG.

<<Comprehensive effect of the foundation formwork structure of the building according to the present embodiment>>
According to such an embodiment, it is possible to provide a foundation formwork structure that does not need to place dump concrete and that realizes further simplification of foundation work. The reason is as follows.

The basic formwork structure of this embodiment is a structure in which the height of each formwork can be adjusted by means of each fixation release means of each formwork support, and a structure in which a resin plate layer is set on a resin block. A horizontal surface can be easily formed by using a resin plate, that is, without pouring concrete. Then, each base having a flat bottom surface serves as a base, and the structure of the formwork support fixture sets the formwork panel by the base and vertical members provided on the base, wherein each base is placed on the resin plate layer. It can be pasted with an adhesive, and the mold support can be fixed and arranged on the resin plate layer only with the adhesive.

In the basic formwork structure of this embodiment, each base of each formwork support is leveled through two or more elongated holes of each base by an adhesive that fixes the base of each formwork support to a resin plate with an adhesive, and a concrete nail is inserted into the concrete. It is a simple means compared to fixing with concrete screws.

Furthermore, because of the structure in which the resin plate layer is set on the resin block and the formwork support is arranged, a partial resin plate layer configuration is sufficient. Therefore, material costs can be saved, and the foundation work can be further simplified and the construction period can be shortened.

In such an embodiment, the structure in which the upper surface of the base concrete has a positional relationship lower than the ground surface can be used for consolidation settlement at low cost even for softer ground with very small bearing capacity. It is possible to provide a foundation formwork structure that can obtain the effect of prevention.

Since the resin block layer in the foundation formwork structure of this embodiment can reduce the consolidation settlement of the substratum due to subsoil replacement, it is not necessary to lower the height of the upper surface of the base concrete so much. The height of the part is not relatively high, and the amount of concrete used can be reduced. If the height is increased, it is necessary to increase the thickness of the rising part itself or provide a thick base to ensure strength, which increases the amount of concrete.

In addition, the structure in which the upper surface of the base concrete is lower than the ground surface and the structure in which the resin block layer is provided cooperate with each other to bring about the effect of replacing the ground at a low cost and high ground bearing capacity. It is possible to obtain the effect of preventing consolidation settlement even for small and soft ground at a low cost.

Furthermore, as described above, the use of resin block layers and formwork supports makes it possible to create a structure that does not use discarded concrete. It is possible to reduce the amount of concrete.

As described above, the foundation formwork structure according to the present invention is useful in that it is possible to provide a foundation formwork structure that eliminates the need to cast discarded concrete and that realizes further simplification of foundation work.

100 First formwork support 101 First base portion 101a Bent end portion 101b Temporary fixing hole portion 102 First vertical member 102a First fixing portion 103 Second vertical member 103a Second fixing portion 104 First horizontal members 104a, 204a projecting piece 105 first unlocking means 106 first panel supporting portion 107 second panel supporting portion 110 first formwork panel 111 first lower rail 112 upper rail 120 second mold Frame panel 121 Second lower rail 130 Width stopper 131 Main part 131a Notch 131b Projection 131d Hole 132 Reinforcing material holding part 132a Through hole 134a Temporary fastener 140 Reinforcing material 140a Suspension material 141a Temporary fixing member 150 Crushed stone Layer 151 Resin block layer 151a Resin block 152 Sheet layer 153 Resin plate layers 154, 251, 254 Reinforcing bars 155, 255 Base concrete 156 Adhesive 157 Peripheral rising portion 200 Second formwork support 201 Second base 203 Third Vertical member 204 Second horizontal member 205 Second fixing release means 207 Third panel support 257 Internal rising portion 1000 Formwork structure 2000 at the position of the outer peripheral rising portion Formwork structure GL at the position of the internal rising portion Ground surface

Claims (5)

A crushed stone layer provided on the ground;
a resin block layer provided on the crushed stone layer, having a flat upper surface and having a lower specific gravity than the ground;
a sheet layer covering the upper surface of the resin block layer;
a resin plate layer provided on the sheet layer;
a plurality of first formwork supports fixed to the upper surface of the resin plate layer with an adhesive so as to form an outer periphery rising portion;
a plurality of second formwork supports fixed to the upper surface of the resin plate layer with an adhesive so as to form an internal raised portion;
a plurality of formwork panels supported by said first formwork support or said second formwork support;
with
the ground surface is at a level between the bottom and top edges of the formwork panels;
The form panel is a steel panel,
A foundation formwork structure in which the lower part of the steel panel outside the outer periphery rising part is buried in the ground before concrete is placed. The resin block layer is composed of one or more resin blocks having a flat upper surface, and the resin blocks have water-permeable openings so that when the underground water level rises, underground water can enter the resin block layer. 2. The basic formwork structure of claim 1, having penetrating structures. each said first formwork support comprising:
a first base having a flat bottom surface;
a first vertical member extending upwardly from the first base;
a second vertical member extending upwardly from the first base;
a first horizontal member spanning between the first vertical member and the second vertical member;
the second vertical member includes first unlocking means capable of switching between a fixed state and a unlocked state of the first horizontal member with respect to the second vertical member;
the first base includes a first panel support for vertically supporting a first formwork panel of the plurality of formwork panels outside the first vertical member;
4. The first horizontal member includes a second panel support for vertically supporting a second formwork panel of the plurality of formwork panels inside the second vertical member. 1. The basic formwork structure according to 1. each said second formwork support comprising:
a second base having a flat bottom surface;
a pair of third vertical members extending upwardly from the second base;
a second horizontal member bridged between the pair of third vertical members;
has
each of the third vertical members includes second unlocking means capable of switching between a locked state and a unlocked state of the second horizontal member with respect to the third vertical member;
2. The basic formwork structure of claim 1, wherein said second horizontal member includes a pair of third panel supports supporting said formwork panel inside each said third vertical member. providing a crushed stone layer on the ground;
providing a resin block layer having a flat upper surface and having a lower specific gravity than the ground on the crushed stone layer;
a step of covering the upper surface of the resin block layer with a sheet layer;
providing a resin plate layer on the sheet layer;
a step of fixing a plurality of first formwork supports to the upper surface of the resin plate layer with an adhesive so as to form an outer periphery rising portion;
a step of fixing a plurality of second formwork supports to the upper surface of the resin plate layer with an adhesive so as to form an internal rising portion;
causing the first formwork support or the second formwork support to support a steel panel as a formwork panel;
burying the lower part of the steel panel outside the outer perimeter rise in the ground until the surface of the ground reaches a height between the lower end and the upper end of the formwork panel before pouring concrete;
Foundation formwork construction method including.

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