JP4919348B2 - Construction method of dam plate formwork and hardware used therefor - Google Patents

Description

  The present invention relates to an independent foundation, a method for constructing a dam plate form on a beam including a small beam and a column base, and a hardware used therefor, and more specifically, a lightweight dam plate form and a special hardware for fixing the same. The present invention relates to a method for constructing a dam plate form which makes the construction of the dam plate form simple and inexpensive by using and a hardware used therefor.

The conventional formwork method using plywood uses a clamp metal such as foam tie hardware that is generally available on the market. It can withstand lateral pressure when placing concrete and has a small amount of bending. Since the fastening hardware is arranged on the formwork at an appropriate interval in the form of combining the horizontal end thick and the vertical end thick so as to be, it requires troublesome work and a work period of a predetermined period and after the work In that case, it has been criticized for its attention to environmental problems in recent years by generating a lot of building residue.
In addition, a steel formwork dam plate method, in which a keystone plate is integrally molded, was developed as an alternative method. However, in foundation work, it is used for independent foundations, underground beams and column bases. In Japan, a keystone plate was bent into a beam groove shape and was used as a beam driving form. (Patent Document 1)

  The steel formwork weir plate construction method is mainly used for foundation work where the process is urgent, etc., so that the work period can be greatly shortened by entering the backfilling work without removing the formwork after placing the concrete. Although it was possible to achieve rationalization of construction, it was essential to provide a projecting column that protruded to the outer surface of the barrier plate, and a boundary plate was formed in the center of the projecting column. In addition, since the lath mesh portion is formed between the convex strut portion and the boundary plate-like portion, the lath net portion is configured even if the structural requirement of providing the convex strut portion is added. Depending on the inclination direction of the plate piece part, the amount of concrete flowing out increases, so it becomes important to distinguish the vertical direction of the dam plate, resulting in a failure that impairs workability. The mesh is tilted with the bottom plate inclined to one side, centering on the boundary plate. By the manner, formwork for sheathing to prevent the installation direction of the operational error has been proposed. (Patent Documents 2 and 3)

  Also, as a problem at the work site, the method of tightening the driving form is not yet uniform, and as shown in FIGS. 7 and 8, the steel rod 24 that determines the internal dimensions of the keystone type dam plate 23 is used appropriately. Even in the proposed conventional method using a separator that is fastened with a wide end 25 attached to a dam plate form and a welded portion 26 at both ends, the welding operation is performed in rainy weather or in a water pool. The work at the location was limited, and it was not easy to place the equipment itself such as the welding equipment, so it was not satisfactory as a site work.

As described above, the steel formwork weir plate construction method has excellent precision quality by factory production, simple work just to set a formwork that is easy to handle and no need to remove the formwork after placing concrete Although it has made many contributions to rationalization measures such as improving work efficiency and eliminating building residual materials by the effects of, etc., any of the steel slab dam construction methods has been A new dam plate formwork that can be easily handled by workers in the field due to the fact that the construction method for tightening has not been established and there are problems that have not been solved by the various proposed construction methods. Therefore, it was desired to quickly establish an improved mounting method and an improved fitting for use therewith.
Japanese Patent Publication No. 2001-73452 Japanese Patent Publication No. 2002-138663 Japanese Patent Publication No. 2002-138664

  In the construction of barrier plates such as beams and column bases including independent foundations, small beams, etc., the present invention is easy to handle when assembling the barrier plates and easy to install separators that maintain the shape of the frames. Therefore, the construction efficiency of the dam plate formwork and the construction method of the dam plate formwork that can reduce the total cost in the construction of the dam plate formwork by eliminating the need for extra work equipment and processed parts The purpose is to provide hardware to be used.

According to the construction method of the dam plate form according to the present invention, the dam plate form reinforced with a plurality of thick horizontal ends is arranged opposite to each other at a predetermined position where the concrete frame is constructed, and is positioned on the upper surface of the wide end thick. A separator provided with threaded portions at least at both ends through a gap in the barrier plate mold is disposed at predetermined intervals between the barrier plate molds, and a separator disposed in a through hole formed on the back surface thereof. The stool type fixed hardware is attached to the upper surface of the thick side end while passing through, and then the weir plate formwork facing each other is installed in place by tightening the nut from both ends of the separator. It is comprised so that it may fix with a saddle-type steady rest metal piece in the state which pinches | interposes the back surface part of a seat-type fixed metal fitting, and the side edge side dam plate side.
At this time, it is also characterized in that the lateral end thickness is L-shaped steel and the dam plate form is a keystone form of thin steel plate.

  A seat-type fixed hardware according to the present invention is used in the construction method of the above-mentioned barrier plate formwork, and is a plane having a predetermined width composed of a depth corresponding to the thickness of the lateral end thick placed on the lateral end thick. And a rear portion formed in a rising state from a position that coincides with the side plate of the lateral end thick behind the flat portion. It is characterized in that a through hole for the separator is provided in the central portion of the.

  The saddle-type steady rest metal fitting according to the present invention is used in the construction method of the above-mentioned barrier plate formwork, and includes an outer side of a nut tightened from an end portion of the separator, a back portion of a seat-type fixed fitting, and a thick weir of a lateral end. Constructed in a bowl shape sandwiching the plate side, extending the lower end of the saddle type nut side to a position where the nut can be passed, and extending the lower end of the horizontal plate end of the saddle type to the lower position of the thick side edge It is characterized by providing a notch for passing the separator from both lower ends to a position corresponding to the through hole of the separator provided in the center portion of the back surface portion of the seat-type fixed hardware.

  The construction method of the dam plate form according to the present invention is a simple method for assembling the dam plate form in the construction of the dam plate form such as an independent foundation, a beam including a small beam and a column base. It is easy to install the separator to be held, it is not affected by the quality of the environment and equipment, and its workability, so it has excellent construction efficiency of the dam plate formwork and eliminates the need for extra work equipment and processed parts With this, it is possible to reduce the total cost in the construction of the dam plate formwork.

  The construction method of the dam plate form according to the present invention basically arranges the dam plate form reinforced with a plurality of thick horizontal ends at a predetermined position where the concrete frame is constructed, A separator having screw portions at least at both ends through a gap in the dam plate mold located on the upper surface is arranged at predetermined intervals between the dam plate molds, and is also arranged in a through hole formed in the back surface portion. The fixed metal fitting is attached to the upper surface of the thick horizontal end while passing through the separator, and then the dam plate formwork that is opposed by tightening the nut from both ends of the separator is placed in place, and then the nut It is configured to be fixed with a saddle-type steady-state metal fitting in a state in which the outer side of the seat and the back portion of the seat-type stationary hardware and the thick side dam plate side are sandwiched.

The construction method of the dam plate form according to the present invention includes steps shown in FIGS. 1 to 4 and FIGS. 5 and 6, which are shown in a side view and a partial front view, while using timely fixed fixtures and saddle-type steady rests as will be described later. It is carried out toward the finished product.
As shown in FIG. 1, the keystone mold frame 1 for constructing an independent foundation, a column base and the like secures a predetermined internal dimension 3 for the keystone mold frame molds 2 and 2 before and after the position for constructing the concrete frame. However, they are placed facing each other. The keystone type dam plate form 2 covers the upper and lower ends of the keystone type dam plate 4 forming a normal punching opening with runners 5 and 5 and has a predetermined top and bottom so as to withstand the pressing of concrete in the transverse direction. A lateral end thick 6 made of L-shaped steel is arranged at every interval.

  Accordingly, a through-hole 7 for passing a separator utilizing an arbitrary punching opening can be formed at any time above the lateral end thick 6 and has been adopted in the conventional steel formwork dam plate method. It is no longer necessary to place a convex column having a special through-hole for the separator in a part of the keystone dam plate, simplifying the configuration of the keystone dam plate frame 2 and reducing the weight. It is illustrated.

After the keystone mold 1 is disposed, the process proceeds to the step shown in FIG. 2 in which the keystone barrier mold 2 is partially enlarged. In FIG. 2, the keystone type dam plate form 2 is composed of a partial front view and a side sectional view taken along the arrow (AA ′).
In this step, the separator 6 formed on the inner side flat surface 9 of the keystone type dam plate mold 2 and the lateral end thick 6 arranged along the outer surface side protruding surface 8 of the keystone dam plate mold 2 is passed. Construction is performed in the through-hole 7 for the purpose. A threaded portion 10 is formed at least at the end of the through hole 7 through which the separator existing on the inner surface side plane 9 passes, and between the keystone type dam plate molds 2 arranged on both sides of the position where the concrete frame is constructed. A separator 11 having a length extending through is passed through, and both ends of the separator 11 are about to be equipped with seat-type fixed hardware 12 as shown in the figure.

  The seat-type fixed hardware 12 is attached to the upper surface of the lateral end thick plate 6 made of L-shaped steel using a gap formed between the outer surface side protruding surface 8 and the inner surface side plane 9 of the keystone type dam plate 4. However, the end portion of the separator 11 is inserted into the through hole 13 formed in the center portion of the back surface portion. The end is inserted into the through-hole 13 of the seat-type fixed hardware 12 or the separator-type fixed hardware 12 is mounted on the end of the separator 11 after passing the separator through the through-hole 7 of the keystone-type barrier plate frame 2 and the side. Whether to attach to the upper surface of the end thick 6 can be appropriately selected according to the surrounding situation.

After the separator 11 and the seat-type fixed hardware 12 are attached to the keystone type dam plate mold 2, the process proceeds to the step shown in FIG. 3 in which the keystone type dam plate mold 2 is partially enlarged. FIG. 3 is composed of a partial front view of the keystone dam plate form 2 and a side cross-sectional view taken along the arrow (BB ′) as in FIG.
In this step, the seat-type fixed hardware 12 is attached to the final position by hooking the front end of the seat-type fixed hardware 12 onto the upper surface of the horizontal end thick plate 6 made of L-shaped steel. In addition, the end portion of the separator 11 is inserted into the through hole 13 in the central portion thereof, and the keystone type of the lateral end thick 6 made of L-shaped steel which is flush with the outer surface side protruding surface 8 of the keystone type dam plate frame 2. It is arranged at a position coincident with the weir plate 4 side.
Therefore, in this step, in order to finally set this positional relationship, the keystone type dam plate molds 2 and 2 which are opposed to each other by screwing the nut 14 from the end of the separator 11 to the position of the dotted line in the figure are arranged. It is set at a predetermined position while tightening, and the lateral end thick plate 6 made of L-shaped steel, the separator 11 and the nut 14 efficiently exhibit a good positional relationship and their respective functions.

FIG. 4 is a partially enlarged view of the keystone type dam plate form 2 after the separator and the seat type fixed metal fitting fixed to the keystone type dam plate form 2 facing each other are fixed by tightening nuts. Move to the process. FIG. 4 includes a partial front view of the keystone dam plate form 2 and a side cross-sectional view taken along the arrow (CC ′) in the same manner as the above figure.
In this process, the keystone type is fixed by sandwiching the outside of the tightened nut and the back part of the seat-type fixed hardware fixed on the thick side edge and the side plate of the wide edge with the saddle-type steady rest hardware. Stabilization is made so that the weir plate formwork does not tilt to the side where the concrete frame is constructed.
As shown in the figure, the facing keystone type dam plate frame 2 is attached to the outside by tightening the attached separator 11 to a seat-type fixed hardware 12 stably mounted on the lateral end with a nut 14. No worries about falling down. However, the through-hole 7 of the separator formed in the keystone type dam plate 4 forms a space with a margin with respect to the separator 11 and the seat-type fixing mounted on the thick side edge 6. Since the hardware 12 also has only its front end engaged with the wide end 6, the configuration in which the keystone type dam plate mold 2 is held so as not to fall toward the concrete frame to be constructed is the separator 11. And the connection state with the through-hole provided in the back surface portion of the seat-type fixed hardware 12.
Therefore, in this process, the separator 11 and the stool are fixed by sandwiching the outside of the nut 14 and the back portion of the stool-type fixed metal 12 and the side of the dam plate of the lateral end 6 while adopting the saddle-type steady metal ware 15. By strengthening the coupling relationship with the hardware 12, the holding force is strengthened so that the keystone type dam plate form 2 does not fall down to the concrete frame side constructed.

  The saddle-shaped steady rest metal 15 is configured in a saddle shape that sandwiches the outer side of the nut 14 tightened from the end of the separator 11 and the back side of the seat-type fixed metal 12 in addition to the weir plate side of the lateral end thick plate 6. The saddle-shaped nut-side lower end 16 extends to a position beyond the end of the separator 11 that extends to the outside of the nut 14 and reaches a depth that is above the separator 11 when set from the lower end. A notch 17 for passing the separator is provided, and the lower end 18 of the saddle-shaped dam plate is extended to a position below the lateral end thick 6, and the through-hole of the separator provided in the back surface portion of the seat-type fixed hardware 12 from the lower end A notch 19 is provided for passing the separator to a position corresponding to.

  In the state of FIG. 4, the outside of the nut 14 and the back surface portion of the seat-type fixed hardware 12 are utilized by utilizing a gap formed between the outer surface side protruding surface 8 and the inner surface side plane 9 of the keystone type dam plate 4. In addition, an early stage of installing the dam plate side of the lateral end thick 6 so as to be sandwiched between the saddle-shaped steady-state metal fittings 15 is shown. By pressing the saddle-shaped steady-state metal fixture 15 further downward from this state, The mold steady metal fitting 15 firmly sandwiches the outer side of the nut 14, the back surface portion of the seat-type stationary metal fitting 12, and the side of the side plate 6 with the slat-type stationary metal fitting 12, thereby separating the separator 11, the seat-type stationary metal fitting 12, and the keystone type weir. Since the holding relationship of the lateral end thick plate 6 of the plate 4 is further strengthened, the facing keystone type dam plate formwork 2 is a seat type in which the mounted separator 11 is stably mounted on the lateral end thick portion. Tighten to fixed hardware 12 with nut 14 It has become not stable construct forms of worry that fall to the inside and outside Te.

Since the construction method of the dam plate form according to the present invention is completed in accordance with the above steps, the completed state of the keystone type dam plate form as an embodiment will be described with reference to a partial perspective view 5 and a partial front view 6.
As shown in FIG. 5, the keystone mold 1 for constructing an independent foundation, a column base, etc. is equipped with a separator 11 and a keystone type dam plate mold 2 before and after the position where the concrete frame is constructed. The seat-type fixed hardware 12 or the like is arranged in a confronting state while securing a predetermined internal dimension. The completed keystone type dam plate form 2 is made of L-shaped steel at predetermined vertical intervals so that the upper and lower ends of the keystone type dam plate 4 are covered with runners 5 and 5 and can withstand the pressing of the cast concrete. The horizontal end thick 6 is arranged, and is firmly arranged without falling down in the front-rear direction by the equipment of the plurality of separators 11 passed between them.
The separator 11 and the seat-type fixing hardware 12 etc. for fixing the separator 11 are located between the outer surface side protruding surface 8 and the inner surface side plane 9 of the keystone type dam plate 4 as is apparent from the partially enlarged view of FIG. Equipped with the gap formed. The seat-type fixed metal fitting 12 is attached to the upper surface in a stable state while hooking the front end portion on a lateral end thick plate 6 made of L-shaped steel, and is flush with the outer surface side protruding surface 8 of the keystone type weir plate 4. In the rear portion, the end portion of the separator 11 is inserted into the through hole 13 in the central portion, and the separator 11 is firmly held by tightening the nut 14. Further, the saddle-shaped steady-state metal fitting 15 has a keystone-type dam plate mold 2 facing each other by firmly sandwiching the outer side of the nut 14 and the back surface portion of the seat-type fixed metal fitting 12 and the dam plate side of the lateral end thick plate 6; 2 maintains a stable construction form so that it does not fall inside or outside.

  As described above, the construction method of the dam plate form according to the present invention uses only separators, nuts, seat-type fixed hardware and saddle-type steady hardware as construction parts to be adopted, and does not use any other construction equipment. In addition, without being limited to the above-described embodiment, a dam plate having an opening for inserting a separator on various dam plate surfaces such as a plywood mold frame, a mesh type dam plate mold frame, and a keystone dam plate mold frame The formwork has a good positional relationship with each other by effectively combining the various horizontal end thicknesses having the engaging portion of the dam plate formwork composed of foam tie hardware, L-type steel horizontal end thickness, etc. and the above construction parts. By adopting them, each efficient work is exhibited, so that a stable construction form without fear of the slat formwork falling in and out can be formed at low cost and in a short period of time.

  The seat-type fixed hardware according to the present invention is used for the above-described construction method of the barrier plate formwork, and has a predetermined width composed of a depth corresponding to the thickness of the lateral end thickness placed on the lateral end thickness. Consists of a back part formed in a rising state from a position that coincides with a flat plate part and an engagement part of the horizontal end formed at the tip of the flat part and a side plate thickness of the horizontal end behind the flat part, It is characterized in that a separator through-hole is provided in the central portion of the back surface portion.

The seat-type fixed hardware according to the present invention is shown in FIG. 2 which is partially enlarged as described above, and will be described with reference to a partial front view and a side sectional view thereof.
The seat-type fixed hardware 12 includes a flat portion 20 having a predetermined width placed on the lateral thick plate 6 disposed along the outer surface protruding surface 8 of the keystone type dam plate frame 2 and a flat surface at the tip thereof. It is composed of an engagement portion 21 with a lateral end thickness formed to have the same width as the portion 20 and a back surface portion 22 formed by starting from a position that coincides with the dam plate side of the lateral end thickness 6 behind the flat surface portion 20. Yes.
The engaging part 21 is formed integrally with the flat part 20 and is bent so as to sandwich the horizontal flat part of the thick side end 6 as shown. Similarly, the back surface portion 22 is integrally formed with the flat surface portion 20 so as to form a flush state with the vertical portion of the lateral end thick portion 6 when the engaging portion 21 is fitted to the distal end of the lateral end thick portion 6. And is formed to extend to a position beyond the separator 11 that is passed through the through hole 7 of the inner surface side plane 9 of the keystone type dam plate. Is provided.

  Since the seat-type fixed hardware according to the present invention is configured as described above, when assembling the keystone-type dam plate form 2 arranged at the position for constructing the concrete frame, the keystone-type dam plate form 2 The end of the separator 11 that crosses through the through-hole 13 provided in the central portion of the back surface portion 22 is passed through the through-hole 13 so that the engaging portion 21 is fitted to the tip of the lateral end thick 6 and is easily placed on the lateral end thick 6. It can be placed on.

  The saddle-type steady rest hardware according to the present invention is used for the above-described construction method of the barrier plate formwork, and includes the outer side of the nut clamped from the end of the separator, the back surface of the seat-type fixed hardware, and the thick side end. The bottom end of the saddle nut is extended to the position where the nut can be passed, and the bottom end of the horizontal end of the saddle plate is It extends to a lower position, and is characterized by providing a notch for passing the separator from both lower ends thereof to a position corresponding to a through hole of the separator provided in the central portion of the back surface portion of the seat-type fixed hardware.

The vertical steady rest according to the present invention is shown in FIG. 4 which is partially enlarged as described above, and will be described with reference to a partial front view and a side sectional view thereof.
The saddle-shaped steady rest metal 15 has a saddle shape that sandwiches the outside of the nut 14 tightened from the end of the separator 11 and the back surface 22 of the seat-type fixed hardware 12 and the side of the dam plate of the lateral end 6 as shown in the figure. It is configured. The lower end 16 on the side of the nut that hangs down in a bowl shape extends to a position beyond the end of the separator 11 that extends to the outside of the nut 14 when used. A notch 17 is provided for passing the separator to a depth that would be located above the separator 11 when finally set. Similarly, the lower end 18 on the side of the dam plate that forms a saddle shape is extended to the lower end position of the vertical portion of the lateral end thick 6 when used, and finally from the lower end 18, When set, a notch 19 is provided for passing the separator to a position that would correspond to the separator through-hole 13 provided in the back surface portion of the seat-type fixed hardware 12.

  Since the saddle-shaped steady rest hardware according to the present invention is configured as described above, when assembling the keystone-type dam plate form 2 arranged at the position for constructing the concrete frame, the keystone-type dam plate form 2 The end portion of the separator 11 that is interposed therebetween is passed through a through hole 13 provided in the back surface portion 22 of the seat-type fixed hardware and tightened with a nut 14, and then the outside of the nut 14, the back surface portion of the seat-type fixed hardware 12, and the side A stable construction form can be maintained so that the keystone type dam plate molds 2 and 2 facing each other by firmly sandwiching the end plate 6 on the side of the dam plate do not fall inward or outward.

  In the construction of barrier plates such as beams and column bases including independent foundations, small beams, etc., the present invention is easy to handle when assembling the barrier plates and easy to install separators that maintain the shape of the frames. Therefore, the construction efficiency of the dam plate formwork and the construction method of the dam plate formwork that can reduce the total cost in the construction of the dam plate formwork by eliminating the need for extra work equipment and processed parts The hardware to be used is provided.

Arrangement drawing of keystone type dam plate formwork in construction method of dam plate form of present invention Partial front view and side sectional view of a seat-type fixed hardware in the construction method of the dam plate form of the present invention Partial front view and side sectional view of nut tightening in construction method of weir plate form of the present invention Partial front view and side cross-sectional view of saddle-shaped steady rest hardware in construction method of weir plate form of the present invention Completion layout drawing of keystone type dam plate form in construction method of dam plate form of present invention Partial perspective view of seat-type fixed hardware and the like in the construction method of the dam plate form of the present invention Form layout of conventional slats for steel formwork Separator layout in the conventional dam plate method for steel molds

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Keystone formwork, 2 ... Keystone type dam plate formwork, 3 ... Internal dimension, 4 ... Keystone type dam plate, 5 ... Runner, 6 ... Side end thick, 7 ... Through-hole, 8 ... Outer surface side protruding surface , 9 ... Plane on the inner surface side, 10 ... Threaded part, 11 ... Exhibition separator, 12 ... Stool-type fixed hardware, 13 ... Through-hole, 14 ... Nut, 15 ... Saddle-shaped steady rest hardware, 16 ... Lower end on the nut side,
DESCRIPTION OF SYMBOLS 17 ... Incision, 18 ... Dam plate side lower end, 19 ... Incision, 20 ... Plane part, 21 ... Engagement part, 22 ... Back part, 23 ... Keystone type weir board, 24 ... Steel rod, 25 ... Thick side edge, 26 welded part

Claims (5)

A plurality of thick dam plates are laid against each other at predetermined positions where the concrete frame is constructed, and screws are attached to at least both ends through the gaps of the dam plate frames located on the upper surface of the thick horizontal plates. A separator provided with a portion is arranged at predetermined intervals between barrier plate molds and a seating type fixed metal fitting is attached to the upper surface of the lateral end thicker while passing the separator through a through hole formed in the back surface portion, Next, the dam plate formwork facing each other by tightening the nut from both ends of the separator is installed at a predetermined position, and thereafter, the outside of the nut, the back surface of the seat-type fixed metal fitting, and the side of the thick dam plate A method of constructing a dam plate form that is fixed with a saddle-type steady rest metal fitting in a state of sandwiching. The construction method of a dam plate form according to claim 1, wherein the lateral end is L-shaped steel. The construction method of a dam plate form according to claim 1, wherein the dam plate form is a keystone form of a thin steel plate. An engagement portion between a flat portion having a predetermined width and a depth corresponding to the thickness of the thick horizontal end placed on the thick horizontal end, and the horizontal end thick formed at the tip of the flat portion, and the rear of the flat portion 4. The separator according to claim 1, wherein a through hole for a separator is provided in a central portion of the back surface portion. Stool-type fixed hardware used in the construction method of the described dam plate formwork. It is configured in a bowl shape that sandwiches the outer side of the nut clamped from the end of the separator, the back part of the seat-type fixed hardware, and the side of the wide end of the dam plate, and the nut can pass the lower end of the saddle type nut side. A through hole of a separator provided in the center part of the back part of the seat-type fixed hardware from both lower ends by extending the bottom end of the horizontal end thick side plate of the saddle type to the lower position of the side end thick. A saddle-type steady rest metal fitting used for the construction method of the dam plate form according to claim 1, wherein a notch for passing the separator to a position corresponding to is provided.

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