JP2000179152A - Form assembling structure of concrete foundation, and foundation-form assembling construction method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve quality and workability, to shorten the term of works and to reduce cost by simultaneously adjusting the height of a foundation top- end integrally under the state, in which the relative relationship of forms and a beam reinforcement is held as it is, eliminating the need for leveling concrete and keeping the thickness of cover concrete from the foundation top-end of the upper-end reinforcement of the beam reinforcement constant. SOLUTION: In form assembling structure, in which the forms 7 of a concrete foundation are supported onto a planking 3 through a form supporting member 9 supported vertically movably by a foundation top-end height adjusting means and a beam reinforcement 6 is supported onto the planking 3, the beam reinforcement 6 is supported onto the planking 3 through the form supporting member 9, and the height of the beam reinforcement 6 and the forms 7 can be adjusted simultaneously and integrally.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a formwork assembling structure for constructing a concrete foundation and a method of assembling and working a foundation formwork.

[0002]

2. Description of the Related Art In general, when a foundation of a building is made of reinforced concrete, a root-cutting groove is dug in a place where the foundation is to be built, a crushed stone is laid in the groove, and digging is performed. ) And place the floor plate (rebar base plate) at a fixed interval on the discarded concrete.
Reinforcing bars are arranged on the bottom plate via a reinforcing bar base, and a formwork is assembled on the bottom plate and adjusted by a spacer block or the like.

Conventionally, in order to adjust the height of the formwork,
Adjustment screw rods are erected at regular intervals in the thickness direction of the foundation on the base plate, and a form support plate mounting table (plate body) is screwed to the screw rods, and a cylinder is placed on the mounting table via a cylinder. There has been proposed a form supporting device in which a form supporting plate is placed, and the form is placed on the form supporting plate and assembled (see Japanese Utility Model Registration No. 2540875).

[0004]

In the above prior art, the height of the mold can be adjusted, but only the mold is adjusted.
There is a problem that the covering thickness of the upper reinforcing bar of the beam reinforcing steel fixed to the top of the concrete foundation fluctuates, and the mounting structure of the adjusting screw bar to the floor plate is complicated, workability is poor, and the number of parts is large. There are problems such as an increase in cost.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-described situation. It is an object of the present invention to adjust the height of a top of a foundation while maintaining the relative positional relationship between a formwork and a beam rebar. Can be performed simultaneously and integrally, eliminating the need for discarded concrete, maintaining a constant thickness at the top of the foundation, and improving accuracy and quality, improving assembly workability, shortening the construction period and reducing costs. It is an object of the present invention to provide a formwork assembly structure for a concrete foundation and a method for assembling a foundation formwork.

[0006]

According to the present invention, the following technical measures are taken to achieve the above object. That is, in the formwork assembly structure of the concrete foundation according to the present invention, the side frame of the concrete foundation is supported on the flooring plate via the form support member which is vertically movably supported by the foundation top height adjusting means. And, in a concrete foundation formwork assembly structure in which the beam reinforcement is supported on the floor plate, the beam reinforcement is supported on the floor plate via the form support member, and the beam reinforcement and the formwork are simultaneously The feature is that the height can be adjusted integrally.

[0007] In this case, since the opposite sides of the beam reinforcing bar and the formwork are integrally supported on the soleplate via the formwork supporting member, the height of the beam reinforcing bar is exactly the same as the height adjustment amount of the formwork. Is adjusted, and the positional relationship between the upper end of the beam reinforcing bar and the top of the foundation, that is, the covering thickness becomes constant. Therefore, a high-precision foundation height can be ensured, and the workability is good.Because the level adjustment of the beam rebar and the formwork is performed integrally, it is not necessary to cast discarded concrete and finish the iron. Construction man-hours and costs can be significantly reduced.

[0008] Further, in the formwork assembly structure according to the present invention, the foundation top height adjusting means may include a plurality of support cylinders erected on the base plate at required intervals in a thickness direction of the foundation. A plurality of adjusting screw rods which are removably inserted from the upper end of the cylindrical body, and a nut member rotatably screwed to each of the screw rods and supported by the cylindrical body; It is characterized in that a frame support member is erected, and a reinforcing bar receiving portion is provided on the form support member. Therefore, by simply rotating the nut member, the height adjustment of both the formwork and the beam rebar can be performed easily and accurately while maintaining the height relationship between them constant. Since the rod is simply inserted into the support cylinder, and the support cylinder is fixed to the floor plate, the structure is simple and the operation is easy, and the workability is extremely good.

Further, in the form assembling structure according to the present invention, since the reinforcing bar is provided on the support cylinder or the floor plate, it is easy to incorporate the beam reinforcing bar, and the intermediate portion of the base bar of the beam reinforcing bar. By supporting the portion, it is possible to prevent sag and ensure accuracy. Further, in the formwork assembling structure according to the present invention, since the reinforcing bar installation base is provided with an overhang on one side in the thickness direction of the concrete foundation, in the case of a T-type cloth foundation, the reinforcing bar installation base is extended. By arranging the portions alternately at opposite positions, the intermediate portion of the base streaks can be supported.
In the case of the die foundation, the intermediate portion of the base bar can be supported by arranging the reinforcing bar installation base such that the overhang is on one side. Therefore, it is only necessary to manufacture one type of flooring plate including the reinforcing bar installation base and the support cylinder, and the management thereof is easy.

The method for assembling and forming a formwork of a concrete foundation according to the present invention is directed to a support cylinder and a reinforcing bar mounting table for inserting and supporting a top end height adjusting screw rod on a crushed stone laid in a root cutting groove at a foundation construction site. A plurality of height-adjusting screw rods having a form supporting member having a reinforcing bar support portion provided at the upper end thereof are arranged at required intervals, and the nut members are screwed to the screw rods. After being inserted into the support cylinder from above and supported via a nut member, and the beam rebar is placed on the plurality of rebar receiving portions and the rebar mounting table, the nut member is rotated to form the form support member. It is characterized in that the level and the height of the top plate are adjusted, the form is placed directly on the form support member or via a separator, and the upper end of the form is temporarily fixed by a separator or the like.

According to the method of the present invention, by adjusting the level and the height of the form supporting member, the level and the height of the form and the beam rebar are adjusted at the same time and the positional relationship between them is maintained integrally. Therefore, the casting of waste concrete, which has been considered indispensable in the past, can be eliminated, the material cost and construction man-hours of waste concrete can be reduced, and the formwork can be mounted on the formwork support member. It can be easily adjusted and moved in the direction of the base thickness, making it easy to make adjustments. It is possible to significantly reduce costs as well as shorten the construction period.

[0012]

Embodiments of the present invention will be described below with reference to the drawings. 1 and 2 show a first embodiment of a formwork assembly structure of a concrete foundation (cloth-based concrete with footing) according to the present invention.
Is a cutting groove excavated at the foundation construction site, 2 is a crushed stone such as gravel or crushed stone laid and compacted in the cutting groove 1,
Reference numeral 3 denotes a floor plate directly placed on the crushed stone 2, and a plurality of the floor plates 3 are arranged at required intervals. The base plate 3 is made of a steel plate and has a rectangular shape as shown in FIG. 2. A fixing nail driving hole for a water thread is provided, and support cylinders 5, 5 are erected (welded) at equal distances in the right and left orthogonal directions from the center of a straight line (L) connecting the nail holes 4, 4.

The two supporting cylinders 5 support a beam reinforcing bar 6 and a formwork 7, which will be described later, and have a height substantially equal to a beam reinforcing bar covering thickness (design value). At the upper ends of the two support cylinders 5, a base reinforcing bar installation table 8 made of an L-shaped steel material having an overhang 8A on one side is fixed in parallel with the base plate 3 by welding. In addition, the height of the base reinforcing bar installation stand 8 is set to the same size as the beam reinforcing bar covering thickness (design value).

Reference numeral 9 denotes a form supporting member, which is made of a square steel bar or a round steel bar, and has a U-shaped reinforcing bar receiving portion 9A at the center in the longitudinal direction.
The upper ends of the height adjusting screw rods 10 are respectively provided on the lower surfaces of both ends of the support member 9 by welding or the like (or screw connection).
It is attached at the same interval as the interval between the support cylinders 5.
The screw rod 10 has a nut member 11 (rotatable structure) supported by the upper end of the support cylinder 9.
Are rotatably screwed together to form a base top height adjusting means, and the structure of the adjusting means is extremely simple and easy to assemble.

The reinforcing bar receiving portion 9A has a required width in the direction of the base thickness, and can adjust the position of the beam reinforcing bar 6 in the direction of the base thickness. 6
A can be placed and supported. The beam reinforcement 6 includes a base reinforcement 6A extending in the longitudinal direction of the base, a base reinforcement 6B disposed on both sides of the main reinforcement 6A in the base thickness direction, and a base reinforcement 6
A horizontal reinforcing bar 6C connecting the A and the base reinforcing bar 6B, a rising reinforcing bar 6D whose lower end is welded to the base main reinforcing bar 6A, an intermediate horizontal vertical bar 6E and an upper vertical bar 6F are assembled by welding.

The formwork 7 is an upright formwork, as shown in FIGS. 6 and 9, comprising a frame 7A framed in a square shape made of steel, and a steel plate panel 7B. The frame body 7A forming the outer frame is provided with a plurality of connection holes 12 for connecting the mold frames 7 to each other at appropriate positions.
Are inserted and interconnected. 14 is a lower form separator, and 15 is an upper side frame separator, both of which are made of a steel plate and have the same shape and the same size, respectively, in the longitudinal direction (base thickness direction).
Forming outer positioning protrusions 16 and 17 are formed to be bent upward at both ends, and form spacing positioning pieces 18 and 19 are provided on the inner upper surfaces of the protrusions 16 and 17, respectively.

Reference numeral 20 denotes a base formwork (footing forming formwork). The connecting pin 1 is attached to a frame 7A of the rising formwork 7.
3 and is fixed by a U-shaped form fixing metal fitting 21, a bolt 22, and a wing nut 23. In addition,
The upper end of the upright formwork 7 is supported by a formwork support (not shown). Next, a method for constructing the formwork assembly structure of the first embodiment (the method of the present invention) will be described with reference to FIGS.

First, as shown in FIG. 3, crushing stones 2 are laid in a root-cutting groove 1 excavated at a foundation construction site and crushed, and then a base plate 3 is placed on a breaking position 2. The eighth overhanging portions 8A are arranged at predetermined intervals so as to be alternately located on opposite sides, and the water thread 24 is pulled using the nail holes 4 to adjust the level and passage of the floor board 3. Then, the adjusting screw rod 10 is inserted into the support cylinders 5 and 5 from above, and is supported by the support cylinder 5 via the nut member 11. At this time,
The upper surface of the reinforcing bar mounting eighth surface and the upper surface of the reinforcing bar receiving portion 9A of the form support member 9 are flush with each other.

Next, the base of the beam reinforcing bar 6 is mounted on the receiving portion 9A with the main groove 6A and the base reinforcing bar 6B is mounted on the base reinforcing bar mounting portion 8 (see FIG. 5). In addition, since the base reinforcing bar 6B of the beam reinforcing bar 6 is directly mounted on the base reinforcing bar mounting eighth, the conventional dice is unnecessary. Therefore, as shown in FIG. 7, a stupid bar 25 is erected on the form supporting member 9, the nut member 11 is rotated, and the screw bar 10 is moved up and down so that the level of the form supporting member 9 and 6. Adjust the height and level of the upper end muscle 6F of 6.

At this time, the form supporting member 9 is moved up and down while the beam reinforcing member 6 is placed on the reinforcing bar receiving portion 9A. Therefore, the relative positional relationship of the upper reinforcing bar 6F of the beam reinforcing member 6 with respect to the form member 7, ie, The height adjustment is performed while the covering thickness of the upper end streak 6F with respect to the base top end is kept constant, and the covering thickness is accurately secured. Subsequently, as shown in FIGS. 5 and 8, after placing the lower separator 14 on the form supporting member 9, the rising form 7 is positioned between the positioning projection 16 and the projection 18 of the separator 14. Is placed, an upper separator 15 is laid on the upper end surface of the formwork 7 and fixed, and a frame 7A of the adjacent formwork 7 is formed.
The connecting pins 13 are fitted and connected by bringing them into contact with each other (see FIG. 6).

Then, the positional relationship between the formwork 7 and the beam reinforcing bar, that is, the overlay thickness in the direction of the base thickness is checked and the street is corrected. At the time of such a correction, the beam rebar 6 only seems to rest on the reinforcing bar receiving portion 9A of the form supporting member 9, and the rising form 7 is connected to the form supporting member 9 via the lower separator 14.
Since it is only placed on the upper part, it can be freely moved in the thickness direction of the foundation, so that the adjustment of the beam reinforcing bar 6 and the formwork 7 can be performed extremely easily.

Further, since the intermediate portion of the base reinforcing bar 6B is supported by the overhanging portion 8A of the installation table 8, the base reinforcing bar 6B does not sag and hang down, and the accuracy is secured and the quality is improved. In addition, 26 in FIG. 6 is a form clamper, which is clamped and fixed so that the frames 7A of the adjacent forms 7 are not separated from each other. Thereafter, the upper end of the rising formwork 7 is supported by a plurality of formwork supports (not shown) so as not to fall.

When the assembling of the rising formwork 7 is completed in this way, as shown in FIGS.
Is fixed to the frame 7A of the rising formwork 7 by the fixing metal 21 or the like, and when the assembling of the base formwork is completed, concrete is driven between the base frames 20 and between the rising formwork 7. At this time, the base plate 3, the support cylinder 5, the adjusting screw rod 10, the nut member 11, the form supporting member 9, and the base reinforcing bar mounting table 8 are embedded in the foundation concrete, and the upper parts of the forms 7, 20, 21 are formed. The separator 15 is disassembled, removed, and reused. The base form 20 may be embedded.

According to the above embodiment of the present invention, the height adjustment (foundation top plate level adjustment) of the rising formwork 7 and the beam reinforcing bar 6 is performed.
At the same time, it can be performed integrally while maintaining the relative relationship between the beam reinforcing bar 6 and the formwork 7, and the foundation top plate and the beam reinforcing bar 6 can be integrated.
The thickness of the upper reinforcing bar 6F can be kept constant and accurately, and the casting of discarded concrete is not required. Further, since both the beam reinforcing bar 6 and the formwork 7 are merely placed on the formwork support member 9, the horizontal movement adjustment section, that is, the street adjustment is easy, and the linearity of the foundation can be ensured. Can be improved.

Moreover, since the reinforcing bar mounting table 8 is provided with a protruding portion 8A on one side and arranged alternately on the opposite side, the base bar 6B of the beam reinforcing bar 6 is bent downward at the intermediate portion. I can support my son. In the first embodiment, as shown in FIG. 10, the side frame support member 9 can be provided with a lower separator receiver 27, whereby the lower separator 14 can be stably supported.

FIGS. 11 and 12 show a main part of a second embodiment of a concrete foundation, particularly an L-shaped cloth foundation (FL) formwork assembly structure according to the present invention. The second embodiment is different from the first embodiment in that the form supporting member 28 has the function of the lower separator 14 described above. That is, a hook-shaped base main reinforcement receiving portion 29 is provided on the lower surface at the center of the form supporting member 28 corresponding to the separator 14 in the first embodiment, and the upper end of the height adjusting screw bar 10 is fixed to the lower surface at both ends. There is a mold outside positioning protrusion 1 on the upper surface.
6. Formwork spacing positioning projections 18 are provided respectively.

The beam reinforcing bar 30 is connected to the base main reinforcing bar 3.
0A is located at the end in the base thickness direction as shown in FIG. 11, and two base reinforcing bars 30B project in one direction, and L
It is formed in the shape of a letter. 11 and 12, the same components as those in the first embodiment are denoted by the same reference numerals as those in FIGS. 1 and 2, and the detailed description is omitted. When assembling the formwork assembling structure according to the second embodiment, the base plate 3 is placed on the crushed crushed stone 2 at predetermined intervals so that the overhang portions 8A of the reinforcing bar mounting tables 8 are located on the same side. The base main reinforcement 30A and the base reinforcement 30 of the beam reinforcement 30 are arranged.
After arranging B on the reinforcing bar mounting table 8 (in this case, no base bar supporting dice is required), the base top end height adjusting screw rod 10 is inserted into the supporting cylinder 5 from above, straddling the base main bar 30A, After the base main reinforcement 30A is hooked on the base main reinforcement receiving portion 29 of the form support member 28, a stupid bar is erected on the form support member 28, and the top end level adjustment is performed by rotating the nut member 11 using an automatic level. Then, the rising mold 7 (not shown) is laid on the mold supporting member 28, and the upper part of the mold 7 is temporarily fixed by the upper separator 15.

At this time, by adjusting the top end level, it is possible to simultaneously and integrally adjust the heights of the upper end bars of the formwork 7 and the beam reinforcing bars 30, so that the upper end bars of the beam reinforcing bars 30 can be covered from the base top end. The thickness is kept constant, and the accuracy and quality are improved. Further, an intermediate portion of the base reinforcing bar 30B close to the base main bar 30A is supported by the overhanging portion 8A of the reinforcing bar mounting table 8, and is prevented from bending downward.

According to the second embodiment, in the form assembling method, the order in which the beam rebar 30 is placed on the reinforcing bar placement eighth is before the arrangement of the form supporting member 28. Although different, the same operation and effect as those of the first embodiment are achieved. The reinforcing bar receiving portion 29 of the form support member 28 is formed in a U-shape like the reinforcing bar receiving portion 9A in the first embodiment, so that the strip-shaped plate can be formed integrally by bending the strip-shaped plate. In addition to the ease and cost reduction, the form supporting member 28 can be supported by the support cylinder 5 before the beam reinforcing bar 30 is arranged on the reinforcing bar mounting table 8 as in the first embodiment.

The present invention is not limited to the above-described embodiment. For example, the nut member 11 may be supported on the support cylinder 5 and provided with a rotating operation part in addition to the one shown. Further, the inner diameter of the support cylinder 5 is
The design can be changed as appropriate, for example, by setting 0 to be a size that can be moved in the radial direction, and by adopting a configuration that allows the horizontal movement adjustment of the form support members 9 and 28. Further, the basic top plate height adjusting means can adopt another structure without depending on the combination of the screw rod 10, the nut member 11, and the support cylinder 5.

[0031]

As described above, in the foundation form assembling structure according to the present invention, the beam rebar is supported on the base plate via the form supporting member, and the beam rebar and the form are simultaneously and integrally heightened. Since the structure is adjustable, the top height of both beams can be adjusted while maintaining the relative position of the beam rebar with respect to the formwork, and the height of the top bar of the beam rebar from the base top is maintained. That is, the covering thickness can be kept constant, and the quality can be improved. Therefore, the workability and efficiency of height adjustment from the top of the foundation can be improved, and it is not necessary to cast discarded concrete, so that the construction period can be shortened and the cost can be reduced.

[0032] In the formwork assembly structure according to the present invention, the foundation top height adjusting means may include a plurality of support cylinders erected at required intervals in the thickness direction of the foundation on the base plate. A plurality of adjusting screw rods which are removably inserted from the upper end of the cylindrical body, and a nut member rotatably screwed to each of the screw rods and supported by the cylindrical body; Since the frame supporting member is provided and the reinforcing bar receiving portion is provided on the form supporting member, the structure is simple, the assembly is easy, the operability is good, and the adjusting operation can be performed efficiently.

The method for assembling and forming a formwork of a concrete foundation according to the present invention is a method of assembling and supporting a reinforcing rod for inserting and supporting a top-end height adjusting screw rod on a crushed stone laid in a root cutting groove at a foundation construction site. A plurality of height-adjusting screw rods having a form supporting member having a reinforcing bar receiving portion provided at an upper end thereof are arranged at required intervals on a floor plate having an installation table, and a nut member is screwed to the screw rod. After being inserted into the supporting cylinder from above and supported via a nut member, and beam beams are placed on the plurality of reinforcing bar receiving portions and the reinforcing bar mounting table, the nut member is rotated to form support. After adjusting the level of the member and the height of the top plate, and temporarily fixing the upper end of the mold with a separator or the like while placing the mold directly or via a separator on the mold support member,
Since this is fixed in place, it is not necessary to cast discarded concrete, reducing material and construction costs,
The cost can be reduced by shortening the construction period, the covering thickness of the top of the foundation can be kept constant and with high accuracy, and the quality can be improved.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view showing a first embodiment of a foundation form assembling structure according to the present invention.

FIG. 2 is an exploded perspective view of a main part of the embodiment.

FIG. 3 is an explanatory view of an embodiment of a method for assembling and executing a formwork of a concrete foundation according to the present invention.

FIG. 4 is an explanatory view of an embodiment of the same formwork assembling method.

FIG. 5 is an explanatory diagram of the same method.

FIG. 6 is an explanatory diagram of the same method.

FIG. 7 is an explanatory diagram of a height level adjustment operation procedure in the embodiment of the construction method.

8 is a partially omitted right side view of FIG. 7;

FIG. 9 is an explanatory diagram of an attached state of the rising formwork and the base formwork in the first embodiment.

FIG. 10 is a perspective view showing a modification of the form support member in the first embodiment.

FIG. 11 is a longitudinal sectional view showing a main part of a second embodiment of the foundation form assembling structure according to the present invention.

FIG. 12 is an exploded perspective view showing a main part of the second embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Root cutting groove 2 Split stone 3 Floor plate 5 Supporting cylinder 6 Beam reinforcing bar 6A Base main bar 6B Base main bar 6F Upper reinforcing bar 7 Formwork (upper formwork) 8 Reinforcing bar mounting stand 8A Overhanging part 9 Formwork supporting member 9A reinforcing bar Receiving part 10 Base top end height adjusting screw 11 Nut member 14 Lower separator 15 Upper separator 28 Formwork supporting member 29 Base main reinforcing bar receiving part (rebar receiving part) 30 Beam reinforcing bar 30A Base main reinforcing bar 30B Base main reinforcing bar

 ────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Susumu Tanaka 3-12-12 Minamisenba, Chuo-ku, Osaka-shi, Osaka F-term in Kubota House Co., Ltd. 2D046 BA11 BA41 2E177 JA01 KA08 KB04 KB06 KC04 KF05

Claims (5)

[Claims] 1. A side frame of a concrete foundation is supported on a slab via a form support member vertically movably supported by a top height adjustment means of a foundation, and a beam reinforcing bar is supported on the slab. In the concrete foundation formwork assembling structure, the beam reinforcement is supported on a floor plate via the form support member, and the height of the beam reinforcement and the formwork can be adjusted simultaneously and integrally. A concrete assembling structure for a concrete foundation. 2. The base top end height adjusting means is inserted into a plurality of support cylinders erected at required intervals in the thickness direction of the foundation on the base plate, and is detachably inserted from upper ends of the respective cylinders. A plurality of adjusting screw rods, and a nut member rotatably screwed to each of the screw rods and supported by the cylindrical body. 2. The concrete base form assembling structure according to claim 1, wherein a reinforcing bar receiving portion is provided on the supporting member. 3. The concrete base form assembling structure according to claim 1, wherein a reinforcing bar installation table is provided on the support cylinder or the floor plate. 4. The reinforcing bar installation stand is protruded to one side in the thickness direction of the concrete foundation.
2. The concrete base formwork assembling structure according to item 1. 5. A supporting cylinder body for inserting and supporting a top-end height adjusting screw rod and a floor plate provided with a reinforcing bar installation stand are arranged at required intervals on a crushed stone laid in a root cutting groove at a foundation construction site. A plurality of height-adjusting screw rods having a form support member having a reinforcing bar receiving portion provided at an upper end thereof, and a nut member being inserted into the support cylinder from above with the nut member screwed into the screw rod. After mounting the beam reinforcing bar on the plurality of reinforcing bar receiving portions and the reinforcing bar mounting table, the nut member is rotated to adjust the level of the form support member and the height of the top plate, and the mold is supported. A method for assembling and executing a formwork on a concrete foundation, wherein the formwork is placed directly on a frame support member or via a separator, and the upper end of the formwork is temporarily fixed by a separator or the like.