JP2010168877A - Residual form and form panel used for the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a residual form, while reducing the weight, capable of securing a pressure-resisting strength when placing concrete, and to provide a form panel using the residual form. <P>SOLUTION: A plurality of the form panels 1 configuring the residual form 19 are composed of: external frames 2 formed in a latticed shape and made of concrete; and internal panels 3 with outer peripheries embedded in the external frames 2 and made of FRP (Fiber-Reinforced-Plastic). A first reinforcement 11a extended in the front and rear directions of the external frame 2 and a second reinforcement 11b extended in the vertical direction to the front and rear directions from the first reinforcement 11a are formed to the embedding part 11 of the outer peripheries of the internal panel 3. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a remaining formwork left as it is on a construction site after placing concrete, and a formwork panel used therefor.

Conventionally, for example, when constructing a wall structure such as a retaining wall or a sabo dam, a residual form made of a concrete panel may be used.
This residual formwork is the same as a normal diversion formwork in that after the framework is constructed as a formwork, ready-mixed concrete is cast into the remaining formwork and a structure is formed, This is different from the diversion form in that it adheres to the concrete surface and remains on the construction site as it is (see Patent Documents 1 and 2). For this reason, there exists an advantage that construction is easy and a work period can be shortened at the point which does not need the demolding work of the formwork after hardening of concrete.

  The conventional remaining formwork is composed of a plurality of formwork panels, and the remaining formwork is constructed at a predetermined height by sequentially stacking the formwork panels upward. At that time, adjacent formwork panels are joined with a joint fitting, and the other end of the separator fixed to the anchor bar of the installation surface is fixed to the joint fitting by welding, Thereby, the compressive strength of the formwork at the time of concrete placement is ensured.

JP 2004-11107 A JP 2006-207317 A

However, since the formwork panel used for this type of remaining formwork is generally composed of heavy concrete panels (about 50 kg per sheet is usually used), in the work of stacking the formwork panels, Will be forced to work hard.
Therefore, in order to solve the above problem, if the formwork panel is made of a material that is lighter than concrete, the formwork panel can be reduced in weight, so that the stacking operation can be easily performed. However, when the formwork panel is reduced in weight, there arises a new problem that the pressure resistance of the remaining formwork at the time of placing the concrete is lowered.

  In view of the above-described problems, an object of the present invention is to provide a residual formwork and a formwork panel using the same, which can reduce the weight and can secure a pressure-resistant strength at the time of placing concrete.

  In order to achieve the above object, the remaining formwork of the present invention is a remaining formwork comprising a plurality of formwork panels that are left as they are in a construction site after concrete placement, and the formwork panels are arranged in a lattice shape. An outer panel that is formed, and an inner panel that is made of a material that is lighter than the material constituting the outer frame and has an embedded portion embedded in the outer frame on an outer peripheral portion, The embedded portion includes a reinforcing portion extending in the front and back direction of the outer frame.

Since the remaining formwork of the present invention comprises the formwork panel with a lattice-shaped outer frame and an inner panel made of a material lighter than the outer frame, the formwork panel can be reduced in weight, Stacking work of formwork panels can be performed easily.
Further, the embedded portion of the inner panel can be firmly attached to the outer frame by the reinforcing portion extending in the front and back direction of the outer frame, so that the pressure resistance strength of the remaining mold can be ensured when placing concrete.

Moreover, it is preferable that the said embedding part further has the 2nd reinforcement part extended in the orthogonal | vertical direction with respect to the said front and back direction from the said reinforcement part.
In this case, the embedded portion of the inner panel can be more firmly attached to the outer frame by the second reinforcing portion extending in a direction perpendicular to the front and back direction from the reinforcing portion. It is possible to improve the pressure strength of the.

Moreover, it is preferable that the said embedding part has a some recessed groove formed in the outer edge.
In this case, the adhesive force of the embedded portion to the outer frame can be increased by the recessed groove formed in the outer edge of the embedded portion.

Moreover, it is preferable that the said embedding part has a some through-hole penetrated in the thickness direction.
In this case, the adhesion force of the embedded portion to the outer frame can be increased by the through-hole penetrating in the thickness direction of the embedded portion.

Moreover, it is preferable that the said formwork panel is further equipped with the connection member which connects the adjacent inner side panel while being able to embed a some inner side panel in the said outer side frame.
In this case, since the adjacent inner panels are connected by the connecting member, the adjacent inner panels can be integrated, and the outer frame is also reinforced by the connecting member, so that the pressure resistance of the remaining mold is improved. Can do.

According to the remaining formwork of the present invention, the formwork panel is constituted by the lattice-shaped outer frame and the inner panel made of a material lighter than the outer frame, so that the formwork panel can be reduced in weight. It is possible to easily stack the formwork panels.
Further, the embedded portion of the inner panel can be firmly attached to the outer frame by the reinforcing portion extending in the front and back direction of the outer frame, so that the pressure resistance strength of the remaining mold can be ensured when placing concrete.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 shows a front view, a side view, and a cross-sectional view of a formwork panel that is a constituent member of a remaining formwork according to the first embodiment of the present invention, and FIG. FIG.
The formwork panel 1 of the present embodiment is for constructing a remaining formwork to be used as it is in the construction site after concrete placement. This remaining formwork is constructed on the installation surface of the construction site when, for example, a wall structure such as a retaining wall or a sabo dam is constructed.
1A and 2, the formwork panel 1 includes an outer frame 2 formed in a lattice shape and a pair of inner panels 3 disposed inside the outer frame 2. .

As shown in FIG. 2, the outer frame 2 includes concrete rib members 4, 5, 6, and 7 that form an outer frame that has a horizontally long rectangular shape, and concrete reinforcing ribs 8 that form an inner frame. Have. Among these, the rib members 4 and 6 and the reinforcing rib 8 are arranged in parallel in the vertical direction (up and down direction in FIG. 2), and the rib members 5 and 7 are arranged in parallel in the horizontal direction (left and right direction in FIG. 2). The rib members 4 to 7 and the reinforcing rib 8 are integrally connected to each other at each end. In addition, the reinforcing rib 8 is attached so as to support the central portion in the longitudinal direction of the rib members 5 and 7.
As shown in FIG. 1B, both side surfaces of the outer frame 2 are formed flat in the vertical direction, and the upper and bottom surfaces of the outer frame 2 are formed flat in the horizontal direction, although not shown. ing.

  As shown in FIG. 2, on the back side of the outer frame 2, there are screw holes 9 that are recessed in the front side direction of the outer frame 2 at the four corners and the central portions of the rib members 5 and 7 in the longitudinal direction. Is formed. Each screw hole 9 is used when attaching the corner | angular part coupling tool 14 and the auxiliary | assistant coupling tool 16 which are mentioned later to the outer side frame 2. FIG. Each screw hole 9 is formed so as not to penetrate to the surface side of the outer frame 2.

FIG. 3A is a front view of the inner panel 3 of the formwork panel 1, and FIG. 3B is a side view of the inner panel 3.
In FIG. 3A, the inner panel 3 is composed of a panel made of FRP (fiber reinforced plastic) that is a lighter material than the concrete that is the material of the outer frame 2. Further, the inner panel 3 includes a panel main body portion 10 formed in a substantially square shape in a front view, and embedded portions 11 formed on four sides that are outer peripheral portions of the panel main body portion 10. The part 11 is embedded in the outer frame 2 (see FIG. 1C).

As shown in FIG. 3 (b), the panel body 10 has a square shape in a side view, and gently moves toward the outer periphery with the central portion in the vertical direction (vertical direction in FIG. 3 (b)) as the apex. It is formed in a tapered shape so as to be inclined.
Further, as shown in FIG. 1 (c), the thickness t2 of the panel body 10 is set to be shorter than the thickness t1 of the outer frame 2, and is closer to the surface side of the outer frame 2 (FIG. 1 (c)). The outer peripheral portion of the panel main body 10 is embedded in the left side of the outer peripheral portion, and the surface of the outer peripheral portion is flush with the surface of the outer frame 2. For this reason, a recess 12 is formed on the back surface side of the outer frame 2 by each inner surface of the outer frame 2 and the back surface of the inner panel 3. That is, two recesses 12 are formed on the back surface of the formwork panel 1, and when the concrete is placed in the construction of the remaining formwork described later, the concrete is filled into the recesses 12 so that the dam body concrete and The integrity with the remaining mold can be improved. In addition, it is possible to give a design to the surface of the panel main body part 10, and the formwork panel 1 can be used as a decorative formwork.

In FIG. 1A, the embedded portions 11 of the pair of left and right inner panels 3 are embedded in the rib members 4 to 7 and the reinforcing ribs 8 of the outer frame 2, respectively. As shown in FIG.1 (c), each embedding part 11 is the 1st reinforcement part 11a extended in the front and back direction (left-right direction of FIG.1 (c)) of each rib material 4-7 and the reinforcement rib 8, and the said And a second reinforcing portion 11b extending in a direction perpendicular to the front and back directions.
One end of the first reinforcing portion 11a is integrally formed with the outer edge of the panel main body portion 10, and the second reinforcing portion 11b extends to the outside of the outer frame 2 at the other end of the first reinforcing portion 11a. Are integrally formed. On the outer edge of the second reinforcing portion 11b, five concave grooves 11c are formed at predetermined intervals in the longitudinal direction (see FIG. 3A).

  In FIG. 1A, the left and right inner panels 3 are connected by six connecting members 13 embedded in the longitudinal direction of the reinforcing rib 8 at a predetermined interval. As shown in FIG. 4, the connecting member 13 is formed in a U-shape, and both end portions of the connecting members 13 are adjacent to the second reinforcing portions 11 b adjacent to each inner panel 3 from the front surface side (upper side in FIG. 4) to the back surface. It is attached to each second reinforcing part 11b in a state penetrating to the side.

FIG. 7 is a rear side perspective view showing a state during the construction of the remaining mold. In the figure, a corner connector 14 that connects corners of four outer frames 2 adjacent to each other is used to connect the outer frames 2 arranged vertically and horizontally.
The corner connector 14 is attached to a substantially square connecting plate 14a to be brought into contact with the back side of the outer frame 2, bolt insertion holes 14b respectively formed in the four corners of the connecting plate 14a, and a central portion of the connecting plate 14a. Support bar 14c. Then, with the connecting plate 14 a in contact with the back side of the outer frame 2, the fastening bolts 15 inserted into the bolt insertion holes 14 b are screwed into the screw holes 9 at the corners adjacent to each other of the four outer frames 2. Thus, the corner portions of the four outer frames 2 can be connected to each other.

Further, as shown in FIG. 7, of the outer frames 2 arranged vertically, the central portion of the rib member 5 at the upper portion of the outer frame 2 one step below and the central portion of the rib member 7 at the lower portion of the outer frame 2 of the next step Is used.
The auxiliary connector 16 includes a rectangular connection plate 16a that is brought into contact with the back side of the outer frame 2, and bolt insertion holes 16b that are formed at both ends in the longitudinal direction of the connection plate 16a. Then, with the connecting plate 16a in contact with the back side of the outer frame 2, the fastening bolts 15 inserted into the respective bolt insertion holes 16b are screwed into the screw holes 9 adjacent to each other in the two outer frames 2, thereby The central portions of the two outer frames 2 can be connected to each other.

  In addition, when attaching said corner | angular part coupling tool 14 and auxiliary | assistant coupling tool 16 to each outer frame 2, by aligning the back surface of each outer frame 2 with the surface of the side to which each coupling plate 14a, 16a is attached, The position of the frame 2 in the front and back direction can be adjusted. Thereby, the operation | work which connects the piled outer frame 2 to the existing outer frame 2 flush can be performed easily.

  5-7 has shown the construction method of the residual formwork of this invention performed using the said formwork panel 1. FIG. Hereinafter, the construction method will be described in detail with reference to FIGS. As shown in FIG. 5, first, a predetermined number of formwork panels 1 are arranged in a horizontal direction on the installation surface of the construction site flattened with discarded concrete or the like, and the outer frame 2 of the adjacent formwork panel 1 is set up. The corners are connected to each other by the corner connector 14.

  Next, the other end of the separator 18 (see FIG. 8) having one end fixed to the anchor bolt 17 on the installation surface is fixed to the support bar 14c of the corner connector 14 by welding or the like. Determine the installation position. Next, the inclination angle of the formwork panel 1 is determined in accordance with a tension (not shown) assembled in advance on the installation surface. In this embodiment, each formwork panel 1 is erected vertically with respect to the installation surface.

In this way, when the work of arranging the plurality of formwork panels 1 on the installation surface at a predetermined inclination angle is completed, the work of stacking the second and subsequent formwork panels 1 is then performed.
FIG. 6 shows the stacking work of the second and subsequent formwork panels 1. In the stacking of the second and subsequent formwork panels 1, first, the bottom surface of the outer frame 2 of the next formwork panel 1 is aligned with the upper surface of the outer frame 2 of the next lower formwork panel 1. Stacking the formwork panels 1 of the steps. Then, the lower corners of the next outer frame 2 are positioned in accordance with the positions of the upper corners of the lower outer frame 2.
At that time, since the inner panel 3 constituting the next-stage formwork panel 1 is constituted by a lightweight panel made of FRP, the next-stage formwork panel 1 is compared with a conventional concrete formwork panel, Because of its light weight, the above stacking operation and positioning can be performed more easily than when a conventional formwork panel is used.

When the positioning is completed, as shown in FIG. 7, the corner couplers 14 attached to the upper corners of the lower outer frame 2 are moved to the lower corners of the outer frame 2 of the next stage. Install each one. In addition, an auxiliary connector 16 is attached to the central portion of the rib member 5 of the outer frame 2 one step below and the central portion of the rib member 7 of the outer frame 2 of the next step. As a result, the outer frame 2 at the lower level and the outer frame 2 at the next level are connected to each other by the corner connector 14 and the auxiliary connector 16.
In this case, the position adjustment in the front and back direction of the outer frame 2 of the next stage is performed in accordance with the surface on the side to which the connection plate 14a of the corner connector 14 attached to the upper corners of the outer frame 2 of the next lower stage is attached. By doing so, the outer frame 2 at the next stage can be connected to the outer frame 2 at the next stage in a flush manner.

Next, the corner | angular part coupling tool 14 is attached to the both corners of the upper side of the outer frame 2 of the next step. And the other end part of the separator 18 (refer FIG. 8) by which the one end part was fixed to the anchor bolt 17 of an installation surface is fixed to the support bar 14c of the corner | angular part connector 14 by welding etc. FIG.
Thereafter, the stacking work of the above-mentioned formwork panel 1 may be repeated until a remaining formwork 19 having a predetermined construction height is obtained.

FIG. 8 is a side view showing the remaining mold assembled by the above construction method. The concrete structure constructed with this type of residual formwork 19 is not a single step of placing the ready-mixed concrete up to the design height, but a jointing operation in which the ready-mixed concrete is placed in multiple steps. The concrete placement height h for each time is approximately 1 m.
The remaining formwork 41 shown in FIG. 8 is after the first concrete placement, and the placement height is set to be lower than that of the second-stage formwork panel 1. And if this first-placed concrete hardens | cures, after the 3rd step and the 4th step formwork panel 1 are piled up, the placement work of the second ready-mixed concrete will be performed. An anchor bolt 17 is embedded in the upper surface of the first ready-mixed concrete to support the surface pressure of the ready-mixed concrete placed for the second time.

As described above, according to the present embodiment, the formwork panel 1 that is a constituent member of the remaining formwork 19 includes the concrete outer frame 2 formed in a lattice shape and the material (concrete of the outer frame 2). ), The formwork panel 1 can be reduced in weight, and the stacking work and positioning work of the formwork panel 1 can be easily performed.
Further, the embedded portion 11 of the inner panel 3 includes a first reinforcing portion 11a that extends in the front and back direction of the outer frame 2 and a second reinforcing portion 11b that extends in a direction perpendicular to the front and back direction. The inner panel 3 can be firmly attached to the outer frame 2. Therefore, it is possible to ensure the pressure resistance of the remaining mold 19 against the surface pressure from the ready-mixed concrete when placing the concrete.
Furthermore, since the recessed groove 11c is formed in the outer edge of the 2nd reinforcement part 11b of the embedding part 11, the adhesive force of the embedding part 11 with respect to the outer side frame 2 can be increased.
Moreover, since the adjacent inner panel 3 is connected by the connecting member 13 embedded in the reinforcing rib 8 of the outer frame 2, the adjacent inner panel 3 can be integrated and the outer frame 2 is also connected. Since it is reinforced by the member 13, the pressure resistance of the remaining mold 19 can be improved.

FIG. 9A is a front view of the inner panel of the mold panel that is a constituent member of the remaining mold according to the second embodiment of the present invention, and FIG. 9B is a diagram of FIG. 9A. It is CC sectional drawing. The second embodiment shows a modification of the groove 12 formed in the embedded portion 11 of the inner panel 3 in the first embodiment.
9A, the inner panel 3 according to the second embodiment has a thickness direction (in FIG. 9B) on the second reinforcing portion 11b of each embedded portion 11 formed on the four sides. Five through holes 20 penetrating in the left-right direction are formed at predetermined intervals. The through hole 20 can increase the adhesion force of the embedded portion 11 to the outer frame 2. Note that the through hole 20 may be formed to penetrate in the thickness direction of the first reinforcing portion 11b.

The present invention is not limited to the above embodiments.
For example, although the inner panel 3 is made of FRP, it may be made of a light metal material such as an aluminum alloy, or may be made of a plurality of steel wires formed in a mesh shape, and is a material constituting the outer frame 2. It is only necessary to use a material that is lighter than (concrete).
The second reinforcing portion 11b is formed to extend from the first reinforcing portion 11a to the outside of the outer frame 2, but is formed to extend to the inside of the outer frame 2 of the first reinforcing portion 11a. May be.
Furthermore, the embedded portion 11 is formed with a first reinforcing portion 11a and a second reinforcing portion 11b. If the pressure resistance of the remaining mold can be ensured when placing concrete, the first reinforcing portion is formed. Only the part 11a may be sufficient.
Further, in the first embodiment, the concave groove 11c is formed in the second reinforcing portion 11b, but when only the first reinforcing portion 11a is formed, it is formed in the first reinforcing portion 11a. May be.

Moreover, in 2nd Embodiment, although the through-hole 20 is formed in the 2nd reinforcement part 11b, you may form in the 1st reinforcement part 11a.
Moreover, although the said through-hole 20 was demonstrated as embodiment different from 1st Embodiment, you may make it form with the ditch | groove 11c in 1st Embodiment.
Moreover, although the structure which the two inner panels 3 are embed | buried under the outer frame 2 was shown, the number of the inner panels 3 can be suitably changed according to use conditions etc.
Further, the shape of the outer frame 2 may be a regular square, and the shape of the inner panel 3 may be a rectangle, a triangle, or a round shape. The outer frame 2 and the inner panel 3 can be appropriately changed in size, arrangement, and shape according to usage conditions and the like.
Further, the remaining mold 19 of the present invention may be erected not only vertically but also inclined.

The contents and results of a bending strength test for verifying the concrete reinforcement structure will be described below.
FIG. 10 is a schematic explanatory diagram of the bending strength test. The test piece 21 used for the test is a rectangular concrete block having a square shape with a cross section of 100 mm × 100 mm and a length of 400 mm. Various reinforcing members are embedded in the test piece 21 in the longitudinal direction, and a total of six types of test pieces 21 (see FIG. 11) were tested.
The bending strength test of each test piece 21 is performed in such a manner that the load F is gradually increased from above to the substantially central portion of the test piece 21 in a state where both ends in the longitudinal direction of the test piece 21 are supported from below. The load (hereinafter referred to as crack load) when cracks occurred in the 21 concrete blocks was measured. Further, the load was applied to the cracked test piece, and the load when the reinforcing member broke (hereinafter referred to as the maximum load) was measured. The said measurement was performed twice and calculated each average value of the crack load and the maximum load.

FIG. 11 is a table showing the test results of the bending strength test.
A test piece 21A having no A-type reinforcing member, a test piece 21B having a B-type reinforcing bar 22 embedded therein, a test piece 21C having a C-type flat FRP panel 23 embedded therein, and a D-type L-shaped plastic A test piece 21D in which the panel 24 is embedded, an E-type L-shaped plastic panel 25 in which the horizontal part of the E type is short, and an L-shaped plastic panel 26 having an F-type recessed groove are embedded in the test piece 21E. Each of the test pieces 21F had a crack load (average value) of 15.3 kN to 17.8 kN, and the crack load of the concrete block was not so different.

However, the maximum load (average value) of the reinforcing members (reinforcing bars 22, panels 23 to 26) is 3 to 5 kN for the B and C types, whereas the D and E types (the first reinforcing portion of the present invention). 11a), which is 10 to 20 kN, and the maximum load was found to increase. Further, it was found that the maximum load of the F type (corresponding to the one having the concave groove 11c of the present invention) is about 30 kN, and the maximum load is further increased.
From the above test results, it is possible to increase the adhesion between the concrete block and the lightweight panel by forming an L-shaped reinforcing part, a concave groove, etc. in the lightweight panel embedded in the concrete block. The strength comparable to the pressure strength of can be obtained.

(A) is a front view of the formwork panel of the residual formwork which concerns on the 1st Embodiment of this invention, (b) is a right view of a formwork panel. (C) is AA sectional drawing of (a). It is a rear view of the said formwork panel. (A) is a front view which shows the inner panel of the said formwork panel, (b) is a side view of the inner panel. It is BB sectional drawing of Fig.1 (a). It is a perspective view which shows the construction method of the said remaining formwork. It is another perspective view which shows the construction method of the said remaining formwork. It is a back side perspective view which shows the state in the middle of construction of the said residual formwork. It is a side view which shows the state in the middle of construction of the said remaining formwork. (A) is a front view of the inner panel of the residual mold according to the second embodiment of the present invention, and (b) is a cross-sectional view taken along the line CC of (a). It is a schematic side view of a bending strength test. It is a table | surface which shows the test result of the said bending strength test.

DESCRIPTION OF SYMBOLS 1 Formwork panel 2 Outer frame 3 Inner panel 11 Embedding part 11a 1st reinforcement part 11b 2nd reinforcement part 11c Groove 13 Connection member 19 Residual formwork 20 Through-hole

Claims (6)

Remaining formwork with a plurality of formwork panels left on the construction site after concrete placement,
The formwork panel includes an outer frame formed in a lattice shape,
It is made of a material that is lighter than the material constituting the outer frame, and has an inner panel having an embedded portion embedded in the outer frame on the outer peripheral portion,
The residual mold, wherein the embedded portion of the inner panel has a reinforcing portion extending in the front and back direction of the outer frame.   The residual mold according to claim 1, wherein the embedded portion further includes a second reinforcing portion extending in a direction perpendicular to the front and back directions from the reinforcing portion.   The residual mold according to claim 1, wherein the embedded portion has a plurality of concave grooves formed on an outer edge thereof.   The residual mold form according to claim 1, wherein the embedded portion has a plurality of through holes penetrating in the thickness direction.   The residual formwork according to claim 1, wherein the formwork panel further includes a connecting member for connecting a plurality of inner panels to the outer frame and connecting adjacent inner panels.   The formwork panel used as a structural member of the residual formwork of any one of Claims 1-5.

Images