JPH1181348A - Form assembly method of self-standing remaining form for concrete retaining wall - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a form assembly method of a concrete retaining wall self-standing type remaining form capable of being simply assembled by anybody and, at the same time, reducing a construction period at a low cost. SOLUTION: Form members 1 formed of plate-like concrete having certain area, at the same time, turning opening sections 11a placed at the up and down positions of a channel material 11 framed of lightweight channel steel having a U-shaped section in a square shape to the downwad direction and at least projecting approximately halves of the opening sections 11a from the rear sides are successively piled up at a specific interval from the slope 4 on a wall side by making use of piling up coupling devices 2 and bearing frame members 3. After the completion of form assembly, the form members 1 are installed in a self-supporting fashion.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for assembling a self-supporting remaining formwork when constructing a concrete retaining wall.

[0002]

2. Description of the Related Art Conventionally, when a concrete retaining wall is constructed, it remains as a wall material to be attached to the surface side of the retaining wall due to its ease of construction, beautiful surface finish, and harmony with the environment. Formwork is often used. As a method of assembling a concrete retaining wall using this remaining formwork, first, as shown in FIG. 8, a lower end of an H-shaped steel is buried on the surface side of an inclined surface (4), and the inclined surface is formed. The steel frame is set up obliquely along (4), a steel frame is arranged at a predetermined distance, and a large number of metal reinforcing materials are prepared between the steel frame and the H-section steel, and both ends are welded. After being formed into a ladder shape, the formwork members (1) are sequentially fixed by welding, fixing tools, or the like, and the stacking is performed, thereby completing the formwork assembly.

[0003]

However, the method of assembling the concrete retaining wall form using the remaining form is a method for assembling a heavy H-section steel or steel frame material to the inclined plane (4) at the site. It had to be transported, resulting in high transportation costs. The heavy object was assembled in a ladder shape along the inclined surface (4) using a machine such as a crane, and there were many welds. Therefore, qualified personnel such as heavy load qualifications, crane qualifications, welding technicians, etc. must always be secured and skilled workers are also required. And the construction cost was high. In addition, there is a problem that it is difficult to shorten the construction period because welding and heavy work are troublesome.

SUMMARY OF THE INVENTION An object of the present invention is to provide a method of assembling a self-supporting residual formwork for a concrete retaining wall, which makes it possible for anyone to easily assemble the formwork, shorten the construction period and reduce costs. And

[0005]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems.
The upper and lower openings of a rectangular channel formed of a light channel steel having a U-shaped cross section and formed in a plate shape with a constant area in a girder system are directed downward and Formwork members at least approximately half of which protrude from the back surface are sequentially stacked using the respective stacking connectors and support frame members at a predetermined distance from the inclined surface on the wall side, and formwork assembly is performed. After going,
A formwork assembling method in which a formwork member is installed independently. still,
It is preferable to form a truss shape by the connecting member for stacking and the supporting frame member, and to insert the form member into the connecting member for stacking sequentially from above. Further, "the form member is self-supporting" in the present invention refers to a state in which the form member is supported without falling down only by being hooked.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a view showing a main part structure assembled by a method according to the present invention. (1) is a plate-shaped form member which is concrete-cured with a certain thickness and area, and the form member (1)
In the inside of the channel, a four-channel U-shaped light channel steel is used to arrange it in a square shape, and it is framed by welding (1
1) is buried approximately half, and a metal mesh (12) is entirely buried as a reinforcing aggregate, and openings (11a) located above and below a rectangular frame-shaped channel (11). Are arranged downward. The surface of the mold member (1) has a decorative part (1a) with a decorative finish, and a groove (1b) for sealing with a caulking agent or the like is formed on the side surface. (See FIG. 2). This groove (1b) prevents the concrete to be poured from leaking out of the overlapped portion of the formwork member (1) when stacking the formwork member (1) as a concrete formwork. It is for doing. Further, a large number of air vent holes (11b) are formed in the entire periphery of the channel member (11) protruding from the back surface of the mold member (1) (see FIG. 3). It should be noted that, as the form member (1), a "remaining form" filed by the present inventor on August 19, 1997 may be used. Further, as another form member (1), as shown in FIG. 4, a member in which a number of through holes (1c) are formed on the entire surface without applying a decorative finish to the surface may be used. At this time, the diameter of the through hole (1c) is in the range of 1 mm to 25 mm, and the shape of the through hole (1c) is not limited to a circle. If the diameter of the through hole (1c) is less than 1 mm, it is difficult to release air and check the degree of filling of the concrete. If the diameter of the hole is more than 25 mm, a large amount of concrete flows out during casting. Cause fear.

(2) is a connecting member for stacking the form member (1) from above, and the connecting member for stacking (2) is provided on the back side of the form member (1). A connecting rod (21) that can be arranged and extended upward, and a hooking member that protrudes from the connecting rod (21) to the front side and hooks the opening (11a) of the channel member (11) at a vertical position. (22) and a tightening screw (23) that is screwed to the back side of the hooking member (22) and whose tip abuts on the connecting rod (21). A hooking member (22) projecting below the connecting rod (21) is fixed, and a hooking member (22) projecting upward is slidable by a tightening screw (23). A connecting portion (21a) is provided at an upper portion of the connecting rod (21), and a hole (21b) is formed. This hole (21b)
Are also drilled in the connecting rod (21) below each hooking member (22) (see FIG. 5). (3) is a connecting tool for stacking (2)
And a base for attaching the lower end and one end of the connecting rod (21) of the connecting tool (2) to the supporting frame member (3) so as to be independent. Rod (3
1), a support rod (32) that can be fixed at the lower end to the other end of the pedestal rod (31) and can be extended upward, and a diagonal member (33) used to reinforce the support of the connecting rod (21). And a fixing member (34) for fixing each intersection when forming the truss shape by the connecting rod (21), the pedestal rod (31), the support rod (32), and the diagonal member (33). There is. The pedestal rod (3
A mounting hole (31a) for mounting the connecting rod (21), the supporting rod (32), and the diagonal member (33) is formed in 1), and a connection that can be added to the upper part of the supporting rod (32). Projection (32
a) is provided and a through hole (32b) is drilled, and below the pedestal rod (31) or the next support rod (32) and a through hole (32b) for attaching a diagonal member (33). Has been drilled. Also, fixing holes (33a) are provided at both ends of the diagonal member (33).
Has been drilled. The fixing member (34) includes a hexagon bolt (34a) and a hexagon nut (34b) (see FIG. 5).
In addition, as the material of the pedestal rod (31) and the diagonal member (33),
It is preferable to use a light channel steel having a flat U-shaped cross section. (4)
Is an inclined surface on the wall side.

Next, a method of assembling a mold according to the present invention will be described. First, a process of forming a truss shape by the connecting member for step stacking (2) and the support frame member (3) so that the mold member (1) becomes independent will be described with reference to FIG. A pedestal rod (31) is attached to an anchor bolt previously embedded as shown in (a).
Insert and secure. Next, the lower end of the stacking connector (2) is attached to the front end of the pedestal rod (31) and fixed with the fixing member (34), and the connecting rod (21) of the stacking connector (2) is fixed. And the pedestal rod (31) are fixed with the fixing member (34) as shown in FIG. At this time, the lower end of the support rod (32) is also attached to the other end of the pedestal rod (31).
The pedestal rod (31) does not use anchor bolts,
The concrete may be flown and fixed to the state shown in FIG. Next, a new connecting member (2) for stacking is prepared, the lower end of the new connecting rod (21) is inserted into the fixed connecting portion (21a), and the hexagon bolt (34a) is inserted into the hole (21b). And screw the hexagonal nut (34b) into place. And support rod (3
2) Similarly, the connection protrusion (32) of the fixed support rod (32) is
a) Insert the lower end of the new support rod (32) into the through hole (3
2b) Insert the hexagon bolt (34a) into the hexagon nut (34b)
Is screwed and fixed, the support rod (32) is extended. The connecting rod (21) and the supporting rod (32) are added together, and at the same time, are reinforced as shown in (c) via a diagonal member (33). If the connecting rod (21) and the supporting rod (32) are added and reinforced via the diagonal members (33) as described above, the connecting tool (2) for step stacking
The support frame member (3) is formed in a truss shape as shown in FIG. In addition, the replenishment is normally continued after completing the stacking of the form member (1) by the required number of stages depending on the state of the form member (1) to be described later. The shape may be completed first. At this time, the form member (1) is formed in the truss shape so that the form member (1) faces the inclined surface (4) at a predetermined distance.

Next, the step of stacking the form member (1) will be described. It is formed in a truss shape in advance with the connecting member (2) for stacking and the supporting frame member (3) (see FIG. 7A). At this time, the truss shape itself is in a state of being independent. First, the opening (11a) in the vertical position of the channel member (11) exposed on the back surface of the mold member (1) is hooked to the hooking member (22) [see FIG. 7 (b)]. Then, when the tightening screw (23) corresponding to the channel member (11) at the upper position is tightened, the hooking member (22) moves as shown by the arrow in the figure and comes into close contact with the end of the opening (11a). Then, it is fixed [see FIG. 7 (c)]. At this time, only the upper part of the form member (1) is fixed by the tightening screw (23), but the lower part of the form member (1) has the opening (11a) hooked to the hanging member (22). Therefore, the pressing force of the casting concrete does not come off. In this manner, the form member (1) is sequentially hooked on the hooking member (22), and the fastening screw (23) corresponding to the channel member (11) at the upper position is tightened and fixed, so that the step stacking is achieved. The work is completed [see FIG. 7 (d)]. In this case, the form member (1) is fixed at a predetermined distance from the inclined surface (4) and is installed in an independent state. After that, if the concrete is cast, the retaining wall is completed, but when the height of the retaining wall is high, the connecting member (2) for the stacking and the supporting frame member (3) are added to form the frame member. (1) may be stacked and the above steps may be repeated according to the height.

[0010]

The present invention having the above-described structure has the following effects.

The upper and lower sides of a channel member (11) which is formed in a concrete system in the form of a plate having a constant area and is framed in a rectangular shape with a light channel steel having a U-shaped cross section. (1) with the opening (11a) positioned at the bottom facing downward and at least approximately half of the opening (11a) projecting from the back surface.
However, at a predetermined distance from the inclined surface (4) on the wall side, the formwork was assembled by successively stacking using the respective connecting tools (2) for stacking and the support frame member (3). Later, since the form member (1) is installed independently, the concrete
The construction of the retaining wall can be easily performed even by inexperienced part-time workers. As a result, there is no need to handle heavy objects as in the past, and it is not necessary to always secure qualified persons such as qualified persons for handling heavy objects, qualified persons for handling crane, and welding technicians. Is extremely easy, and the construction cost can be reduced and the construction period can be shortened. In addition, since approximately half of the cross section of the channel member (11) is exposed from the back surface of the mold member (1), the bonding property with the concrete to be cast is improved, and the strength is good. In addition, the opening (11a) of the channel member (11) can be easily inserted into the hooking member (22) of the connecting member (2) for stacking. Further, the opening (11a) having a U-shaped cross section of the channel member (11) is directed downward, so that the form member (1) is simply inserted into the connecting member for stacking (2) from above by one-touch operation. Attachment becomes possible, and as for the screw tightening work of the connecting tool for step stacking (2), the mold frame member (1) is fixed simply by turning the tightening screw (23) at a position where the hand can easily reach at least the upper part. Workability has been greatly improved.
In particular, even when the thickness of the concrete retaining wall is thin, the formwork of the formwork member (1) can be extremely easily assembled, and when the thickness of the concrete structure other than the retaining wall is small. Can also be applied.

According to a second aspect of the present invention, the form member (1) is
Makeup part made of concrete with a cosmetic finish on the surface (1a)
By using a material having a shape, the surface of the formwork is improved in appearance, the surface finish after the concrete casting is unnecessary, and the construction period can be shortened. Further, by forming a large number of air vent holes (11b) all around the channel member (11) protruding from the back surface of the formwork member (1), it serves as an air vent for the concrete to be cast, and It also plays the role of strengthening the bond with concrete.

According to a third aspect of the present invention, the formwork member (1) has a hole diameter of 1 mm over the entire surface without applying a decorative finish to the surface.
If a plurality of through-holes (1c) having a size of up to 25 mm are formed, the concrete can enter each through-hole (1c) at the time of placing the concrete, so that the bonding property is improved. Also, the through hole (1c) allows air to escape better when the concrete is cast, prevents the accumulation of air, and allows the excess moisture of the concrete to be discharged to the outside from the through hole (1c). The strength of the hardened concrete is increased, and the filled state of the poured concrete can be confirmed.

According to a fourth aspect of the present invention, there is provided a connector (2) for stacking a stack.
A connecting rod (21) which is arranged on the back side of the form member (1) and can be extended upward, and an opening of the channel member (11) protruding from the connecting rod (21) to the front side and positioned vertically. Department (11
a) A hanging member (22) for hanging the a), and the hanging member (22)
And a fastening screw (23) having a tip abutting on the connecting rod (21), so that the conventional welding becomes unnecessary, and even a layman can easily form the mold member (1). ) Can be performed, and workability is extremely improved.

According to a fifth aspect of the present invention, as a supporting frame member (3), a lower portion and one end of a connecting rod (21) of a connecting tool (2) for stacking a pedestal (31) for mounting the lower end and one end thereof. A support rod (32) that can be fixed at the lower end to the other end of the pedestal rod (31) and can be extended upward, and a diagonal member (33) used to reinforce the support of the connecting rod (21). , The connecting rod (2
1), a pedestal rod (31), a support rod (32), and a fixing member (34) for fixing each intersection when it is formed in a truss shape by a diagonal member (33). In addition, the mold member (1) can be made to stand on its own, the operation can be extremely simplified, and each member can be assembled, so that a heavy H-shaped steel or steel frame as in the conventional case is not required, The transportation cost can be reduced and the schedule of the work process can be easily set and implemented.

[Brief description of the drawings]

FIG. 1 is an explanatory view showing a state in which formwork is stacked and assembled by the method of the present invention.

FIG. 2 is a cross-sectional view illustrating a main structure of a mold member used in the embodiment.

FIG. 3 is a perspective view showing a channel member and a net used in the form member of the embodiment.

FIG. 4 is a cross-sectional view illustrating a main structure of a separate mold member used in the embodiment.

FIG. 5 is an explanatory view showing a main structure of a connecting member for stacking and a support frame member used in the present invention.

FIG. 6 is an explanatory view showing a step of forming a mold member into a truss shape for self-supporting.

FIG. 7 is an explanatory view showing a step of stacking the form members.

FIG. 8 is an explanatory view showing a state where the formwork is stacked and assembled by the conventional method.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Form member 1a Decorative part 1c Through hole 11 Channel material 11a Opening 11b Air vent hole 2 Stacking connector 21 Connecting rod 22 Hanging member 23 Tightening screw 3 Support frame member 31 Pedestal rod 32 Support rod 33 Bevel Material 34 Fixing member 4 Inclined surface

Claims (5)

[Claims] An opening which is formed in the form of a plate having a constant area in the form of a concrete system and which is located above and below a channel member (11) framed in a square shape with a light channel steel having a U-shaped cross section. Department (11a)
Form member (1) having the opening downward (11a) and at least approximately half of its opening (11a) projecting from the back surface is separated from the inclined surface (4) on the wall side by a predetermined distance, and each of the connecting members for stacking (2) The concrete frame is sequentially stacked by using the support frame member (3), and after assembling the mold, the mold member (1) is installed independently. Formwork assembling method for self-supporting remaining formwork for walls. 2. The mold member (1) has a decorative part (1a) made of concrete and having a decorative finish on the surface, and the entire circumference of the channel member (11) protruding from the back surface. Air vent holes (11
2. The method for assembling a self-supporting remaining formwork for a concrete retaining wall according to claim 1, wherein a number of b) are formed. 3. The mold member (1) is provided with a large number of through-holes (1c) having a hole diameter in the range of 1 mm to 25 mm throughout the entire surface without applying a decorative finish to the surface. A method for assembling a self-supporting remaining formwork for a concrete retaining wall as described in the above. 4. A connecting rod (21) which is arranged on the back side of the formwork member (1) and can be extended upward from the connecting member (2), and a connecting rod (21) extending from the connecting rod (21) to the front side. A hooking member (22) that protrudes and hooks the opening (11a) of the channel member (11) at the up and down position, and is screwed to the hooking member (22) and the tip thereof is connected to the connecting rod ( Tightening screw (23) abutting on 21)
2. The method of assembling a self-supporting remaining formwork for a concrete retaining wall according to claim 1, comprising: 5. A pedestal rod (31) for attaching the lower end and one end of a connecting rod (21) of the connecting member (2) for the support frame member (3) so as to be free standing, and The pedestal rod (3
1) a supporting rod (32) which can be fixed at the lower end to the other end and can be extended upward, a diagonal member (33) used to reinforce the support of the connecting rod (21), and the connecting rod (21) A fixing member (3) for fixing each intersection when it is formed in a truss shape with the pedestal rod (31), the support rod (32), and the diagonal member (33)
4) The method of assembling a self-supporting remaining formwork for a concrete retaining wall according to claim 1, comprising: