JP6910101B1 - Formwork equipment for concrete structures and formwork methods for concrete structures - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a formwork device for a concrete structure capable of maintaining a space between formwork without using a separator. SOLUTION: A pair of molds 1, a support member 2 fixed to each outer surface of the pair of molds 1, and each outer surface of the support member 2 are spaced so as to be orthogonal to the longitudinal direction. The holding member 5 includes a vertical portion 6 fixed to the outside of the support member 2, and a horizontal portion 7 extending from the upper end of the vertical portion 6 in the direction opposite to the support member 2. At the corner where the vertical portion 6 and the horizontal portion 7 intersect, a connecting member 8 for connecting and holding a plurality of holding members 5 arranged at intervals in the longitudinal direction is arranged. On the upper surface of the horizontal portion 7 of the left and right holding members 5 straddling the pair of molds 1, a spacing beam 10 for holding the spacing between the pair of molds 1 is placed, and the horizontal portion 7 is provided. And the interval holding beam 10 are integrally fixed by the tightening metal fitting 11. [Selection diagram] Fig. 1

Description

The present invention relates to, for example, a formwork device for a concrete structure and a formwork method for a concrete structure used when constructing an underground beam or the like.

Generally, when constructing underground beams, etc. to be provided between the foundations of a building, after digging a groove by root cutting, waste concrete is poured into the base part, and then the underground beams are placed on the waste concrete. After the reinforcement work, the formwork material such as wooden boards is carried in by a crane etc. to build the formwork, and after assembling the scaffold, concrete is poured, and after the concrete is hardened, the formwork and scaffold are installed. The work is done in the order of disassembling and unloading from the site.

As the formwork used for the construction of the above-mentioned underground beam or the like, conventionally, for example, in order to set a pair of formwork in which the surface on the side where concrete is placed is formed flat and a space between the formwork. It is known that the separator is provided with a plurality of separators to support the pressure of concrete acting on the formwork by the separator (hereinafter, referred to as "conventional technique 1". For example, refer to Patent Document 1).

In addition, as formwork used for construction of underground beams, etc., a pair of formwork and a plurality of separators for setting the distance between the formwork are provided, and a pair of scaffolding brackets are provided on the outside of each formwork. And an installation rod is provided, the scaffolding plate is placed on the upper surface of the horizontal scaffolding receiving member provided on the upper part of each bracket, and the scaffolding plate is installed on both sides of the formwork at a position higher than the upper end of the formwork. It is known (hereinafter referred to as "conventional technique 2". For example, refer to Patent Document 2).

Japanese Unexamined Patent Publication No. 2005-330649 Japanese Unexamined Patent Publication No. 2005-256291

However, in the prior art 1, it is necessary to provide a plurality of separators for setting the spacing between the molds, and the setting of the spacing between the molds by these separators is complicated, and the separator is attached and the mold is attached. There was a problem that the time required for dismantling work increased.
Further, in the prior art 2, since the scaffolding bracket and the installation rod are provided on the outside of the formwork provided with a plurality of separators for setting the distance between the formwork, it is difficult to attach and detach the separators. In addition to the separator, there is a problem that it is necessary to provide a special member for installing the scaffolding plate.

The present invention has been made to solve the problems of the prior art, and by providing a space-holding beam for holding the space between the pair of formwork on the upper part of the pair of formwork, the formwork without using a separator is provided. It is an object of the present invention to provide a formwork device for a concrete structure and a formwork method for a concrete structure capable of maintaining a space between them.
Further, according to the present invention, by installing the scaffolding above the formwork by using the space-holding beam, the scaffolding can be installed without requiring a special member for installing the scaffolding. It is an object of the present invention to provide a formwork device and a formwork method for concrete structures.

In order to achieve the above object, the formwork device for a concrete structure of the present invention is firstly fixed to a pair of formwork for placing a concrete structure and the outer surfaces of the pair of formwork. Support members and holding members arranged at intervals on the outer surfaces of the support members so as to be orthogonal to the longitudinal direction.
The holding member is formed of a vertical portion fixed to the outside of the support member and a horizontal portion extending from the upper end of the vertical portion in a direction opposite to the support member, and the vertical portion and the horizontal portion. At the corners where the members intersect, a connecting member for connecting and holding a plurality of the holding members arranged at intervals in the longitudinal direction is arranged.
Spacing beams for holding the spacing between the pair of formwork are placed on the upper surface of the horizontal portion of the left and right holding members straddling the pair of formwork, and the horizontal portion and the spacing beam beam. Is characterized by being integrally fixed with a tightening bracket.
According to this feature, by providing the spacing beam, the spacing between the formwork can be set without using the conventional separator, and the spacing beam and the holding member are driven in cooperation with each other. The formwork can be firmly held against the internal pressure of concrete.

Secondly, in the first feature, the formwork device for a concrete structure of the present invention is located at a position connecting a lower portion of the vertical portion of the holding member and an outer end portion of the horizontal portion. It is characterized in that a telescopic jack for maintaining an angle between the vertical portion and the horizontal portion is provided.
According to this feature, the angle between the vertical portion and the horizontal portion 7 of the holding member can be maintained, and thus the formwork is held more firmly against the internal pressure of the concrete acting on the formwork. be able to.

Further, in the formwork device for a concrete structure of the present invention, thirdly, in the first or second feature, end members are fixed to both end faces of the interval holding beam, and the end members are attached to each of the end members. Is characterized in that a jack base capable of pressing or pulling the outer end surface of the horizontal portion of the holding member is attached.
According to this feature, the holding member can be pressed toward the support member and the formwork, and the formwork can be held more firmly against the internal pressure of the concrete acting on the formwork. Further, the formwork can be peeled off from the concrete structure by pulling the holding member in the opposite direction.

Further, in the formwork device for a concrete structure of the present invention, fourthly, in any one of the first to third features, a temporary scaffold for use in concrete placing work is placed on the upper surface of the interval holding beam. Is characterized by being installed.
According to this feature, the scaffold can be installed by using the interval holding beam without the need for special members for scaffold installation, so that the configuration of the device can be simplified and the assembly work of the device can be completed in a short time. It can be carried out.

In the formwork method of the concrete structure of the present invention, after digging a groove by root cutting, waste concrete is placed in the base portion, and then underground beams are arranged on the waste concrete, and after the reinforcing bar construction. A method of constructing a concrete structure that is continuous in the longitudinal direction by alternately repeating the loading of the formwork device and placing concrete in the space of the formwork device and moving the formwork device to the next placement position. In
A support member is fixed to the outer surface of the formwork, a plurality of holding members are fixed to the outer surface of the support member at intervals so as to be orthogonal to the longitudinal direction, and the plurality of holding members are fixed in the longitudinal direction from the connecting member. A pair of half-split formwork devices are formed by connecting them in the above, and the upper part of the pair of half-split formwork devices is placed in a state where the pair of half-split formwork devices are arranged facing each other at a predetermined interval. Further, the spacing holding beam is placed on the upper surface of each of the holding members of the half-split formwork device, and the holding member and the spacing holding beam are integrally fixed by a tightening metal fitting to integrally fix the pair of half-split frames. The formwork device is formed by integrally assembling the device and then installing a temporary scaffold on the upper surface of the space holding beam, and the formwork device is carried to the site where the concrete structure is constructed and the formwork is carried by the jack base. The formwork device is installed, concrete is cast in the space of the formwork, and after the concrete is hardened, the formwork device is moved to the next casting position.
According to this feature, by providing the spacing beam, it is easy to assemble the formwork device because the conventional separator is not used, and the scaffolding can be installed by using the spacing beam, so that the scaffolding can be installed. Therefore, it is not necessary to provide a special member, and the scaffolding installation device can be assembled in a short time.

The present invention has the following excellent effects.
(1) A pair of formwork for placing a concrete structure, a support member fixed to each outer surface of the pair of formwork, and each outer surface of the support member orthogonal to the longitudinal direction. With holding members arranged at intervals so as to
The holding member is formed of a vertical portion fixed to the outside of the support member and a horizontal portion extending from the upper end of the vertical portion in a direction opposite to the support member, and the vertical portion and the horizontal portion. At the corners where the members intersect, connecting members for connecting and holding a plurality of the holding members arranged at intervals in the longitudinal direction are arranged, and the left and right sides straddle the pair of molds. A space-holding beam for holding the space between the pair of formwork is placed on the upper surface of the horizontal part of the holding member, and the horizontal part and the space-holding beam are integrally fixed by a tightening metal fitting. As a result, the distance between the formwork can be set without using a conventional separator, and the formwork is strengthened against the internal pressure of the concrete cast in which the space holding beam and the holding member cooperate with each other. Can be held in.

(2) A telescopic jack for maintaining an angle between the vertical portion and the horizontal portion is provided at a position connecting the lower portion of the vertical portion of the holding member and the outer end portion of the horizontal portion. , The angle between the vertical portion and the horizontal portion of the holding member can be maintained, and the formwork can be held more firmly against the internal pressure of the concrete acting on the formwork.

(3) End members are fixed to both end faces of the spacing beam, and a jack base capable of pressing or pulling the outer end face of the horizontal portion of the holding member is attached to each of these end members. As a result, the holding member can be pressed toward the support member and the formwork, and the formwork can be held more firmly against the internal pressure of the concrete acting on the formwork. Further, the formwork can be peeled off from the concrete structure by pulling the holding member in the opposite direction.

(4) By installing a temporary scaffolding for use in concrete placing work on the upper surface of the spacing beam, the spacing beam can be used without the need for special members for scaffolding installation. Since the scaffolding can be installed, the configuration of the device can be simplified and the assembly work of the device can be performed in a short time.

(5) After digging a groove by root cutting, waste concrete is placed on the base part, then underground beams are arranged on the waste concrete, and formwork equipment is carried in after reinforcement work to form the formwork. In a construction method in which concrete is placed in the space of the equipment and the formwork equipment is moved to the next placement position alternately to construct a concrete structure that is continuous in the longitudinal direction.
A support member is fixed to the outer surface of the formwork, a plurality of holding members are fixed to the outer surface of the support member at intervals so as to be orthogonal to the longitudinal direction, and the plurality of holding members are fixed in the longitudinal direction from the connecting member. A pair of half-split formwork devices are formed by connecting them in the above, and the upper part of the pair of half-split formwork devices is placed in a state where the pair of half-split formwork devices are arranged facing each other at a predetermined interval. Further, the spacing holding beam is placed on the upper surface of each of the holding members of the half-split formwork device, and the holding member and the spacing holding beam are integrally fixed by a tightening metal fitting to integrally fix the pair of half-split frames. The formwork device is formed by integrally assembling the device and then installing a temporary scaffold on the upper surface of the space holding beam, and the formwork device is carried to the site where the concrete structure is constructed and the formwork is carried by the jack base. By installing the formwork, placing concrete in the space of the formwork, and after the concrete has hardened, the formwork device is moved to the next placework position to provide a space-holding beam. Since the formwork device is easy to assemble because no separator is used, and the scaffolding can be installed using the spacing beam, there is no need to install special members for scaffolding installation. The assembly work of the device can be performed in a short time.

It is a front view of the formwork device for a concrete structure which concerns on embodiment of this invention. It is the AA arrow view of FIG. It is a top view of the formwork device for a concrete structure which concerns on embodiment of this invention. It is a perspective view for demonstrating the formwork construction method of the concrete structure which concerns on embodiment of this invention, and shows the state which one of a pair of half-split frame devices is assembled. It is a perspective view for demonstrating the formwork construction method of the concrete structure which concerns on embodiment of this invention, and shows the state which a pair of half-split frame devices are arranged facing each other at a predetermined interval. .. It is a perspective view for demonstrating the formwork construction method of the concrete structure which concerns on embodiment of this invention, and shows the state which a pair of half-split frame devices are integrally fixed by a space-holding beam. It is a perspective view for demonstrating the formwork construction method of the concrete structure which concerns on embodiment of this invention, and shows the state which the temporary scaffolding is installed on the upper surface of the interval holding beam. It is a perspective view for demonstrating the formwork construction method of the concrete structure which concerns on embodiment of this invention, and shows the state which the formwork device is carried to the site which constructs a concrete structure, and is installed. be.

The formwork device for concrete structures and the form for carrying out the formwork method for concrete structures according to the present invention will be described in detail with reference to the drawings, but the present invention is not construed as being limited to this. Without deviating from the scope of the present invention, various changes, modifications and improvements can be made based on the knowledge of those skilled in the art.

With reference to FIGS. 1 to 3, a formwork device for a concrete structure suitable for constructing a concrete structure such as an underground beam will be described as an example.

FIG. 1 is a front view of the concrete structure formwork device 30. The concrete structure formwork device 30 is placed on a waste concrete 50 cast at the bottom of a groove for constructing an underground beam or the like. Is shown in the installed state.
The reinforcement of the underground beam is omitted, and the member indicated by reference numeral 51 is a pier for positioning.
The formwork device 30 for a concrete structure includes a pair of formwork 1, 1 for placing a concrete structure.
The pair of formwork 1, 1 is a flat plate made of veneer plywood or the like having a predetermined height (height in the vertical direction with respect to the ground) and a predetermined length (length in the horizontal direction with respect to the ground), respectively. It is a shaped plate material.
Support members 2 and 2 are arranged on the outer surfaces of the pair of formwork 1 and 1 at predetermined intervals in the height direction along the longitudinal direction of the formwork 1 and 1. The support member 2 is formed in a truss structure integrated with truss members 4 arranged so as to form a truss in the longitudinal direction between two wooden square timbers 3 and 3, and the inner square timber 3 is a formwork. It is fixed to the outer surface of 1 with a fixing bracket such as a screw. By mounting the support member 2 on the outside of the formwork 1 opposite to the concrete casting surface, it is possible to prevent the formwork 1 from bulging outward due to the internal pressure of the concrete.

A holding member 5 is fixed in the height direction on the outer surfaces of the left and right supporting members 2 and 2, respectively. As shown in FIG. 2, in this embodiment, three holding members 5 are arranged at intervals in the longitudinal direction.
As shown in FIG. 1, the holding member 5 is composed of a vertical portion 6 joined to the outside of the support member 2 and a horizontal portion 7 extending from the upper end of the vertical portion 6 in the direction opposite to the support member 2 (outward direction). It is formed and has a substantially L-shape. The holding member 5 is formed of, for example, a steel material such as H-shaped steel, and the vertical portion 6 and the horizontal portion 7 are fixed by welding to form an integral structure. Although not shown, the vertical portion 6 of the holding member 5 and the square lumber 3 of the supporting member 2 are fixed by a known fixing bracket such as a bolt.
Further, the telescopic jack 9 is provided so as to linearly connect the lower portion of the vertical portion 6 of the holding member 5 and the outer portion of the horizontal portion 7. By operating the telescopic jack 9 so as to extend, the angle between the vertical portion 6 and the horizontal portion 7 (about) against the internal pressure of the concrete acting on the vertical portion 6 via the formwork 1 and the support member 2. 90 °) can be maintained, and thus the swelling of the mold 1 can be prevented.

At the corner where the vertical portion 6 and the horizontal portion 7 of the holding member 5 intersect, a connecting member 8 for connecting and holding a plurality of holding members 5 arranged at intervals in the longitudinal direction is arranged. ing. The connecting member 8 is formed of, for example, a square pipe, and is fixed to the vertical portion 6 of the holding member 5 with a fixing bracket 22 such as a bolt. As shown in FIG. 2, the length of the connecting member 8 is substantially the same as the length of the mold 1, and the three holding members 5 are connected and fixed by the connecting member 8. As a result, one of the pair of half-split formwork devices 31 and 31 constituting the formwork device 30 is formed. Similarly, the other half-split formwork device 31 is also formed, and the pair of half-split formwork devices 31 and 31 are arranged to face each other as shown in FIG.

Spacing beams 10 for holding the spacing between the pair of half-split formwork devices 31 and 31 are mounted on the upper surfaces of the horizontal portions 7, 7 of the left and right holding members 5, 5 straddling the pair of formwork 1, 1. Placed. The spacing beam 10 is formed of, for example, a steel material such as H-shaped steel, and has a length that reaches the ground on both sides of the groove for constructing an underground beam or the like. Further, as shown in FIG. 2, since three holding members 5 are arranged in the formwork 1 of this embodiment, three spacing holding beams 10 are also provided corresponding to the three holding members 5. Arranged.
The interval holding beam 10 is integrally fixed to the horizontal portion 7 of the holding member 5 by the tightening metal fitting 11. The tightening metal fitting 11 is not particularly limited, but in the present embodiment, it has a substantially U-shaped cross section that encloses the outer shell of the cross section of the horizontal portion 7 of the holding member 5 and the space holding beam 10. (See FIG. 2) And between the band member 12 having a predetermined width as shown in FIG. 1 and the sandwiching portions 13 and 13 having a U-shaped cross section that opens inside the upper end of the band member 12. It is formed of a plate-shaped locking member 14 to be inserted into the band member 12 and a bolt 21 or the like for integrally tightening and fixing the band member 12 and the locking member 14. The height dimension of the U-shaped portion of the band member 12 is set to be smaller than the total height of the spacing beam 10 and the horizontal portion 7, and when the bolt 21 is tightened, the spacing beam 10 and the horizontal portion 7 are brought together. It is designed to be tightened firmly.
Two tightening metal fittings 11 are arranged on each side, but the present invention is not limited to this, and one or more tightening metal fittings 11 may be provided.
By fixing the interval holding beam 10 integrally with the holding member 5, the pair of half-split formwork devices 31 and 31 are integrated.

Further, the end members 15 and 15 are fixed to both end faces of the interval holding beam 10 by welding or the like, and the jack bases 16 and 16 are attached to the end members 15 and 15 in the horizontal direction, respectively.
The jack base 16 is made of metal, and a screw rod 24 is erected from the base plate 23, and a handle member 25 with a nut is screwed onto the screw rod 24, and is used for adjusting the height of a scaffold or the like. It is a known one.
The base plates 23 of the jack bases 16 and 16 are fixed in contact with the end surface of the horizontal portion 7 of the holding member 5, and the holding member 5 is formed into the formwork 1 by operating the handle member 25 inside the end member 15. And can be pressed toward the support member 2, and can counter the internal pressure of the concrete acting on the holding member 5 via the formwork 1 and the support member 2. Therefore, the pair of half-split formwork devices 31 and 31 can be held at predetermined intervals. Further, the formwork can be peeled off from the concrete structure by pulling the holding member 5 in the direction opposite to the formwork 1 and the support member 2 by operating the handle member 25 outside the end member 15.

Since the space holding beam 10 and the holding member 5 are integrally fixed by the tightening metal fitting 11, even if the formwork 1 and the support member 2 receive a force to bulge outward due to the internal pressure of the concrete, the holding member 5 The vertical portion 6 can prevent the formwork 1 and the support member 2 from bulging. Therefore, the conventionally used separator can be omitted.
Further, the jack bases 16 and 16 provided on the end members 15 and 15 on both sides of the interval holding beam 10 move the holding members 5 and 5 toward the center side so as to face the outward force received by the holding members 5 and 5. Can be pushed back. Therefore, by providing the jack base 16 in addition to the tightening metal fitting 11, double safety can be obtained.

As shown in FIG. 1, jack bases 17 and 17 for adjusting the height of the formwork device 30 and supporting the load are mounted on both ends of the spacing beam 10. The jack base 17 is installed on the ground on both sides of the groove for constructing an underground beam or the like. Although not shown, a jack base is also attached to the lower end of the vertical portion 6 of the holding member 5 to adjust the height of the form device 30 and support the load in cooperation with the jack bases 17 and 17. By doing so, double safety and accuracy can be obtained.

As shown in FIGS. 1 and 3, the space holding beams 10 are placed on the upper surface of the space holding beams 10, that is, the upper surfaces of the three space holding beams 10, 10 and 10, and are used for concrete placing work. Temporary scaffolding 18 is installed. In this embodiment, the temporary scaffold 18 is formed symmetrically except for directly above the formwork 1 and 1, and has substantially the same length as the length of the formwork 1 in the length direction. Therefore, the upper part where the concrete is cast is opened, and the worker performing the casting work can perform the work on the temporary scaffold 18 on either the left or right side or both. The temporary scaffolding 18 includes a scaffolding plate 19 and a handrail 20, and these scaffolding plates 19 and the handrail 20 are directly fixed to the spacing beam 10 by a fixing metal fitting (not shown). Therefore, it is not necessary to provide a special member for supporting the temporary scaffold 18. As the scaffolding plate 19, for example, a known scaffolding plate is used, and similarly, as the handrail 20, for example, a known pipe is used.
Further, as shown in FIG. 3, since the tightening metal fitting 11 located inside and the scaffolding plate 19 overlap each other, an operation hole for loosening or tightening the bolt 21 of the tightening metal fitting 11 is performed. 26 is provided on the scaffolding board 19. The operation hole 26 may be provided on either the left or right scaffolding plate 19 or 19. In the case of FIG. 3, since the operation hole 26 is provided in the scaffolding plate 19 on the right side, the scaffolding plate 19 on the left side does not need to adjust the tightening metal fitting 11, so that the operation hole is not provided.

Next, the formwork method for the concrete structure will be described with reference to FIGS. 4 to 8.
(1) First, as shown in FIG. 4, a set of half-split formwork devices 31 is manufactured by the following procedure in a factory yard or the like.
(A) Support members 2 are arranged on the outer surface of the formwork 1 along the longitudinal direction of the formwork 1 at predetermined intervals in the height direction, and are fixed to the formwork 1 by using fixing metal fittings such as screws.
(B) A holding member 5 composed of a vertical portion 6 and a horizontal portion 7 is arranged in the height direction on the outer surface of the supporting member 2 at intervals in the longitudinal direction, and the vertical portion 6 and the supporting member 2 of the holding member 5 are arranged. Fix the square lumber 3 and the square lumber 3 with a fixing bracket such as a bolt.
(C) The connecting member 8 is fixed to a corner where the vertical portion 6 and the horizontal portion 7 of the three holding members 5 arranged at intervals in the longitudinal direction intersect with a fixing bracket such as a bolt, and the three holding members 5 are fixed. The holding member 5 is connected and held. As a result, the half-split formwork device 31 is formed.

(2) Similarly, another half-split formwork device 31 is manufactured by the procedure of (1) to (3) above, and is transported to the site by a truck or the like in the state of the half-split formwork device 31.

(3) As shown in FIG. 5, a pair of half-split formwork devices 31 and 31 are arranged to face each other in a yard or the like at a construction site.
(4) As shown in FIG. 6, in a state where the pair of half-split formwork devices 31 and 31 are arranged to face each other, the left and right holding members 5 and 5 straddle the upper part of the pair of half-split formwork devices 31 and 31. The spacing beam 10 is placed on the upper surfaces of the horizontal portions 7 and 7, and the horizontal portions 7 and 7 and the spacing beam 10 are integrally fixed by the tightening metal fittings 11 to integrally integrate the pair of half-split frame devices 31 and 31. Assemble to. Further, the telescopic jack 9 is mounted so as to linearly connect the lower portion of the vertical portion 6 of the holding member 5 and the outer end portion of the horizontal portion 7. Further, the end members 15 and 15 are fixed to both end faces of the spacing beam 10 by welding or the like, and the jack bases 16 and 16 are attached to the end members 15 and 15 in the horizontal direction, respectively. The base plate 23 of the jack bases 16 and 16 is brought into contact with and fixed to the end surface of the horizontal portion 7 of the holding member 5, and the jack bases 16 and 16 are operated to press the holding member 5 toward the form 1 and the support member 2. Pull to adjust.

(5) As shown in FIG. 7, the space-holding beam 10 is placed on the upper surface of the space-holding beam 10, that is, the three space-holding beams 10, 10 and 10, and is used for concrete placing work. Temporary scaffolding 18 is installed. The temporary scaffold 18 is formed symmetrically except directly above the space formed by the pair of formwork 1, 1.
This completes the assembly work of the formwork device 30 in the yard or the like at the construction site.

(6) As shown in FIG. 8, the formwork device 30 is carried into the site where the concrete structure is constructed by using a crane device 52 or the like, and the formwork device 30 is installed on the waste concrete 50. At that time, jack bases 17 and 17 for adjusting the height of the formwork device 30 and supporting the load are attached to both ends of the spacing beam 10. The jack base 17 is installed on the ground on both sides of the groove for constructing an underground beam or the like. A jack base can also be attached to the lower end of the vertical portion 6 of the holding member 5 to adjust the height of the form device 30 and support the load in cooperation with the jack bases 17 and 17.
(7) Concrete is cast in the space of the formwork 1 and 1, and after the concrete is hardened, the formwork device 30 is moved to the next casting position without being disassembled.

Although examples of the present invention have been described above with reference to the drawings, the specific configuration is not limited to these examples, and any changes or additions within the scope of the gist of the present invention are included in the present invention. Is done.

For example, in the above-described embodiment, an example in which three holding members 5 arranged at intervals in the longitudinal direction are used on the outer surface of the support member 2 has been described, but the present invention is not limited thereto. It is appropriately determined by design according to conditions such as the lateral length of the formwork and the internal pressure received from the concrete to be cast. At least two or more may be used.

Further, for example, in the above embodiment, the tightening metal fitting 11 has been described as having a structure in which the band member 12 and the locking member 14 are integrally tightened and fixed by bolts 21 as shown in FIG. 2, but the present invention is limited to this. It suffices that the space-holding beam 10 and the holding member 5 are firmly fixed so as to be disassembled without being disassembled.

1 formwork
2 Support member 3 Square lumber
4 Truss material 5 Holding member 6 Vertical part 7 Horizontal part 8 Connecting member 9 Telescopic jack 10 Spacing holding beam 11 Tightening bracket 12 Band member
13 Sanding part 14 Locking member 15 End member
16 Jack base 17 Jack base 18 Temporary scaffolding 19 Scaffolding board 20 Handrail 21 Bolt 22 Fixing bracket 23 Base board 24 Screw rod 25 Handle member 26 Operation hole
30 formwork device
31 Half-split formwork device 50 Waste concrete 51 Positioning crosspiece

Claims (5)

A pair of formwork for placing a concrete structure, a support member fixed to each outer surface of the pair of formwork, and an interval so as to be orthogonal to the longitudinal direction of each outer surface of the support member. With a holding member that is placed and arranged
The holding member is formed of a vertical portion fixed to the outside of the support member and a horizontal portion extending from the upper end of the vertical portion in a direction opposite to the support member, and the vertical portion and the horizontal portion are fixed. In addition to having an integral structure, the corners where the vertical portion and the horizontal portion intersect are connected to connect and hold a plurality of the holding members arranged at intervals in the longitudinal direction. Members are arranged, and the connecting member is fixed to the holding member with a fixing bracket, and the pair of molds is placed on the upper surface of the horizontal portion of the left and right holding members across the pair of molds. A mold device for a concrete structure, wherein a space-holding beam for holding a space between frames is placed, and the horizontal portion and the space-holding beam are integrally fixed by a tightening metal fitting. A telescopic jack for maintaining an angle between the vertical portion and the horizontal portion is provided at a position connecting the lower portion of the vertical portion of the holding member and the outer end portion of the horizontal portion. The formwork device for a concrete structure according to claim 1. An end member is fixed to both end faces of the spacing beam, and a jack base capable of pressing or pulling the outer end face of the horizontal portion of the holding member is attached to each of these end members. The formwork device for a concrete structure according to claim 1 or 2. The formwork device for a concrete structure according to claim 1 or 2, wherein a temporary scaffolding for use in concrete placing work is installed on the upper surface of the space-holding beam. After digging a groove by root cutting, waste concrete is placed on the base part, then underground beams are arranged on the waste concrete, and the formwork equipment is carried in after the reinforcement work to create the space for the formwork equipment. and pouring concrete into the inner, the method of construction of the concrete structure longitudinally continuous alternately repeated movement and the next droplet installation position of the formwork device,
A support member is fixed to the outer surface of the formwork, a plurality of holding members are fixed to the outer surface of the support member at intervals so as to be orthogonal to the longitudinal direction, and the plurality of holding members are fixed in the longitudinal direction from the connecting member. A pair of half-split formwork devices configured by connecting are formed, and the pair of half-split formwork devices are arranged to face each other at predetermined intervals and straddle the upper part of the pair of half-split formwork devices. A space-holding beam is placed on the upper surface of each of the holding members of the half-split formwork device, and the holding member and the space-holding beam are integrally fixed by a tightening metal fitting to integrally fix the pair of half-split frame devices. After that, a formwork device is formed by installing a temporary scaffold on the upper surface of the space holding beam, and the formwork device is carried to the site where the concrete structure is constructed and the formwork is carried by the jack base. A formwork method for a concrete structure, characterized in that the device is installed, concrete is cast in the space of the formwork, and after the concrete is hardened, the formwork device is moved to the next casting position.

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