JPH064153U - Abandoned formwork used in the temporary construction method - Google Patents

Abstract

(57) [Summary] [Purpose] The objective is to integrally save the entire product into a plate shape, thus saving space for storage or transportation and facilitating handling. [Structure] A bent portion (15) having a connecting angle such that a space is provided between the outer surface of the temporary member and the outer shape of the cross section of the temporary member is substantially the same as the cross section. ) Are provided transversely in the width direction, and the anchor part (11) is provided on the surface corresponding to the outer surface and the locking part (1) is provided on the surface corresponding to the inner surface.
2) is formed so that the core material is mainly composed of cement and the core material is embedded in the length direction, and integrally molded into a plate shape.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention is representative of a temporary pile of H-shaped steel or the like that supports a temporary ground floor for performing the construction of this basement floor from the ground during the construction work of a concrete-based building having a basement floor, for example. This is a scrap frame used in the temporary construction method when constructing a concrete part such as a concrete slab around the temporary member. The present invention relates to a formwork that can achieve the above and can be handled easily.

[0002]

[Prior art]

 Conventionally, construction work of a basement floor of a concrete building having a basement floor, for example, has been carried out as follows. First, as shown in FIG. 1, a sheet pile 1 is driven around the planned construction site to construct an earth retaining wall 2. Next, from the ground, temporary piles 3 made of, for example, H-shaped steel are driven in at a required interval. Then, the temporary ground floor 4 is provided on the ground while being held by the temporary pile 3. After that, the excavation machine 5 such as a backhoe placed on the temporary ground floor 4 is used to excavate to a required depth. Next, the concrete slab 6 is constructed. When this series of construction work is completed, the temporary pile 3 is pulled out and removed. Then, the through holes or recesses of the removal marks of the temporary piles 3 formed on the concrete slab 6 are backfilled with concrete.

In such construction work on the basement floor, in order to remove the temporary pile 3 after the completion of a series of works, for example, in Japanese Patent Laid-Open No. 59-8838, the concrete slab 6 of the temporary pile 3 is formed. On the outside of the corresponding penetrating portion or embedded portion, a release member 8 made of a foam synthetic resin body or rubber as shown in FIG. Is disclosed.

[0004]

[Problems to be solved by the device]

 However, even though the release member 8 is divided into a pair of component parts 8 and 8, the release member 8 has a cross-section that is substantially the same as the outer shape of the cross-section of the temporary resister 3, and is placed outside the outer shape. Since it is installed, it is bulky and requires a lot of space for storage or transportation. Moreover, since the shape is complicated, it is difficult to handle. Further, since the release member 8 is made of a material that is easily deformed, the temporary anti-removal member 3 is released when the heavy cutting machine 5 such as a backpo moves vertically and horizontally on the temporary ground floor 4 during the construction. The mold member 8 may be bent within a required range of thickness, and the temporary ground floor 4 held by the mold member 8 may swing vertically and horizontally, which may hinder work on the ground. For this reason, usually, after pouring concrete, the required part of the release member 8 is scraped from above, and using this scraped part, wedges are driven from above between the temporary resistance 3 and the poured concrete. There is a need. Further, when the temporary resister 3 penetrates the multiple layers of concrete slab 6, it is necessary to remove the release member 8 prior to this removal. Furthermore, the generation of waste materials is also a problem. When the temporary slab 3 is vertically erected on the concrete slab 6 after the temporary slab 3 is removed, the through hole formed in the removal trace of the temporary slab 3 is backfilled with concrete. Therefore, it is necessary to dispose a formwork below the through hole of the concrete slab 6 through a support.

In view of these conventional problems, a waste formwork used in the temporary construction method according to the present invention has been devised. For example, in a construction work of a concrete building having a basement floor, For example, when constructing a concrete part represented by a concrete slab around a temporary member represented by a temporary pile such as H-shaped steel that supports a temporary above-ground floor for the construction of the basement floor during the period. The purpose is to make it possible to save space for storage or transportation by simply molding the entire form of the scrap frame used in the temporary construction method into a plate shape, and to simply handle it.

[0006]

[Means for Solving the Problems]

 In order to achieve such an object, according to claim 1 of the present invention, a space is provided between the outer surface of the temporary member and the outer shape of the cross section of the temporary member is substantially the same as the tubular shape. In addition, a bent portion having the connecting angle is provided transversely in the width direction, and an anchor portion is formed on the surface corresponding to the outer side surface and a locking portion is formed on the surface corresponding to the inner side surface. Thus, the scrap frame used in the temporary construction method, which is mainly made of cement and internally provided with a core material in the length direction, is integrally molded into a plate shape. Further, in the present invention, the core material is positioned inside the bent portion so as to be placed inside the bent portion, and both side edges of the bent portion on the inner side of the bent portion are diagonally cut out so as to face each other. In addition, in claim 3, a concrete holding member for backfilling is provided along the portion corresponding to the lower portion of the inner surface from the portion corresponding to the upper portion to the portion corresponding to the lower portion so as to be foldable. Are illustrated respectively. Further, in claim 4, in claim 3, the holding member is formed of wire mesh.

[0007]

[Action]

 Then, in order to construct a concrete part around the temporary member using such a scrap frame, the following is done. First, for example, a slab formwork such as a plywood panel is arranged via a support immediately below a through-hole or an embedding part corresponding to a concrete part of a temporary member provided in the vertical direction and oriented in the horizontal direction. After that, the temporary frame is placed outside the temporary member and is bent at the bending portion so as to surround the outer peripheral surface of the temporary member, and the scrap frame assembled in a three-dimensional shape is placed to prevent the temporary member from bending. Between the outer surface and the inner surface of the scrap frame, the space holding member is dropped from above and locked to the locking portion of the scrap frame. In this state, concrete is cast around the outer surface of the scrap frame. By doing so, even if a large moving load is applied to the temporary ground floor held by the temporary member, the bending of the temporary member is regulated and the work on the ground is less affected. It When the temporary member is to be removed after the concrete has hardened, the spacing member is first removed, and then this is pulled out. After this, when the temporary member is erected in a state where the temporary member penetrates through the concrete part, after removing the temporary member, the through hole formed in the scrap frame of the removal trace of this is backfilled with concrete. For this purpose, the holding member provided on the inner surface of the scrap frame is folded back in the direction of closing the through hole, and the work is performed from above. Also, with regard to the recess formed in the scrap frame, when backfilling with concrete, the work is performed from above as it is. In addition, a part of various structural members may be penetrated or embedded in the through hole or the recess of the concrete portion.

[0008]

【Example】

 The details of the scrap frame used in the temporary construction method according to the present invention will be further described with reference to the accompanying drawings.

Here, an example will be described for use in the case of constructing a concrete slab having a basement floor as shown in FIG. 1, for example, in a basement floor construction work of a concrete building.

The scrap frame 10 is constructed by integrally assembling two plate-shaped ones into a three-dimensional shape to form a pair of divided constituent parts 13 and 13, and combining them. In this case, there is a gap between it and the outer surface of the temporary reinforcement 3 made of H-shaped steel, and the external shape of the cross section of the temporary pile 3 is approximately the same as the H-shaped tubular shape. In addition to being formed, it has an anchor portion 11 on the outer side surface and an engaging portion 12 of the spacing member on the inner side surface. The outer side anchor portion 11 and the inner side locking portion 12 are formed to have substantially the same thickness in advance as shown in FIG. 2, FIG. 3, FIG. 4 and FIG. It is provided by forming the constituent parts 13 and 13 by assembling so that the outer side surface and the inner side surface are both tapered surfaces with the lower surface side narrowed from the upper surface side. Further, the three recesses provided in the upper and lower horizontal directions of the surface corresponding to the outer surface are for forming the auxiliary anchor portion 14. As described above, in this scrap frame 10, the component parts 13 divided into two pairs are formed in a plate shape at the time of molding as shown in FIGS. 6, 7, and 8, respectively. It is bent at a bent portion 15 which forms a connecting corner portion provided transversely in the width direction so as to have a shape shown in FIGS. 2, 3, 4, and 5. In order to enable such bending, the core 13 made of wire mesh is left on the outside of the bending portion 15 as shown in FIG. The interior of the folding part 15 is provided with a notch edge part 17 which is diagonally cut out and is provided on both side edges on the inner side of the folding part 15. By providing the cut-out edge portion 17, a ridge is formed in the molding die, whereby the core material 16 is located outside the bend in this portion. Reference numeral 18 in the figure is provided between the bent portions 15 and 15 of the parts corresponding to the lower inner side surfaces of the constituent portions 13 and 13 so as to extend outward from the edge of the core 16 as shown in FIGS. It is a holding member of concrete to be backfilled, which will be described later, provided on all of the surfaces corresponding to the seven inner surfaces. In addition, in the figure, 19 has one end separately from the core material 16 in the constituent part 13 and the other end is extended to the outside to be backfilled similarly provided only on the surfaces corresponding to the two inner surfaces. It is an auxiliary holding member for concrete. The holding member 18 and the auxiliary holding member 19 are shown in FIG. 9 until the through hole formed in the scrap frame 10 of the removal trace of the temporary anti-removal member 3 is backfilled with concrete after the removal. As shown in Fig. 10, the inner surface of each of the components 13, 13 should be aligned with the inner surface from the lower part to the upper part so that this does not hinder a series of operations. Is desired. Further, the holding member 18 and the auxiliary holding member 19 are folded back in the direction of closing the through hole of the removal mark of the temporary anti-removal member 3. At this time, at least those on the adjacent surfaces or the surfaces facing each other are It is considered to form the length relationship such that the tip sides overlap each other.

The wire mesh of the core 16 and the holding member 18 and the auxiliary holding member 19 has a wire diameter of 0.7 to 1.5 mm, preferably 0.9 to 1.1 mm, and the material spacing is 1 mm. Those in the range of 10 to 10 mm, preferably 3 to 7 mm are suitable.

[0012] The scrap frame 10 is made mainly of cement because it is necessary to leave the scrap frame 10 in the cast concrete. Among the materials mainly composed of cement, it is preferable to use a material impregnated with a polymer, because the thickness can be molded to, for example, about 1 cm, and the shape can be freely set. Further, it is preferable that the fluidity is good before curing and the rigidity becomes large after curing.

By the way, even when the concrete form 6 is provided around the temporary shield 3 by using the scrap frame according to the present invention, the soil pile wall 2 is constructed by driving the sheet pile 1 around the planned construction site. After that, temporary piles 3 made of H-shaped steel are driven from the ground at a required interval, and a temporary ground floor 4 is provided on the ground while being held by the temporary piles 3. Up to the process of excavating to a required depth using the excavator 5 such as the backhoe placed, the process is the same as the conventional one.

Next, a slab formwork 20 such as a plywood panel is arranged directly below a through-hole or an embedding part corresponding to the concrete slab 6 of the temporary pile 3 via a support (not shown). After this, as shown in FIG. 11, a scrap frame composed of a pair of constituent parts 13 and 13 assembled at a three-dimensional shape by bending the lateral side of the temporary pile 3 with a bending part 15 at a space from the outside. Then, the seal member 21 is attached to the upper surface of the scrap frame 10 as shown in FIG. Further, in order to prevent the bending of the temporary pile 3, as shown in FIGS. 13 and 14, a wedge-shaped spacing member 22 formed between the outer side surface and the inner side surface of the temporary resistance 3 is dropped from above and the scrap frame 10 is removed. It is to be locked to the locking portion 12. Then, in this state, as shown in FIG. 15, concrete is poured around the outer side surface of the scrap frame 10 so that the upper surface is substantially flush with the upper surface of the seal member 21. By doing so, the bending of the temporary anti-restriction 3 is restricted, and the work on the ground is less likely to be hindered. Next, the slab formwork 20 is removed as shown in FIG. Then, after the concrete is hardened, when removing the temporary resister 3, first the spacing member 22 is removed, and then this is pulled out. Since the temporary frame 3 and the concrete slab 6 face each other with the scrap frame 10 interposed therebetween, the risk of damaging the concrete slab 6 when the temporary frame 3 is removed is reduced. After this, at the location where the temporary slab 3 was erected in the concrete slab 6 in a penetrating state, after removing the temporary slab 3, the through-hole formed in the scrap frame 10 of the removal trace of this was removed. In the case of backfilling with, the holding member 18 provided on the scrap frame 10 and the auxiliary holding member 19 (not shown) are folded back in the direction of closing the through-hole as shown in FIGS. Work from above. When this holding member 18 is folded back, if there is a portion where at least the tip ends do not overlap with each other between those on adjacent surfaces or opposite surfaces, or the rigidity of the material forming the holding member 18 is small. In this case, it is considered to drop the closing member made of wire mesh from above. Then, the seal member 21 attached to the upper surface of the scrap frame 10 is removed, and the upper surface of the scrap frame 10 is also backfilled with concrete so as to be flush with the surroundings. The bottom of the holding member 18 of the scrap frame 10 may be appropriately backfilled with concrete or mortar. In this way, if the through hole formed in the removal trace of the temporary anti-sheath 3 of the concrete slab 6 is backfilled with concrete, the work of disposing the formwork below the through hole via the support is unnecessary. become. Also, regarding the recess formed in the scrap frame 10, even when the scrap frame 10 is provided with the holding member 18 and the auxiliary holding member 19 when backfilling with concrete, the recess is closed. Work from above without folding back in the direction of

In the scrap frame 10, the core material 16, the holding member 18, and the auxiliary holding member 19 may be a net-like material other than a wire net, various punching sheets, or various woven fabrics, knitted fabrics, non-woven fabrics, and the like. Further, the core material 16 can also be provided by arranging strips of wire or the like in parallel with each other in parallel with the length direction. Further, if the bending portion 15 is bendable, various shapes can be used.

Further, the holding member 18 and the auxiliary holding member 19 provided on the scrap frame 10 are not limited to the arrangements shown in the drawings, and it may be considered to utilize them for the rebar work. However, it is not always necessary to provide the holding member 18 and the auxiliary holding member 19 in the scrap frame 10, and it is possible to use those without them.

Further, the anchor portion 11 provided on the outer side surface and the locking portion 12 provided on the inner side surface may be formed in the shape of ridges or may be provided in a scattered manner in addition to the embodiment shown in the drawings. Will be considered as appropriate.

Further, the scrap frame 10 can be divided into other two or more parts without being formed in the component parts 13 and 13 which are divided into two parts.

Further, such a scrap frame 10 can be formed so as to become one complete product when it is bent at the bent portion 15 and assembled into a three-dimensional shape.

Regardless of the illustrated embodiment, as the temporary member typified by the temporary pile 3, in addition to H-shaped steel, L-shaped steel, C-shaped steel or hollow round steel, hollow square steel, and various solid steel bars, etc. Can be used.

In the illustrated embodiment, the scrap form according to the present invention is used for constructing a concrete slab for a basement floor construction work of a concrete building having a basement floor. In addition, in addition to this, it is used when forming a through hole or a concave part to support concrete parts such as floors and walls in a state of penetrating various structural members such as pipes or in a state where part of them is embedded. It is also possible to do so. It can also be used when forming a recess for supporting a handrail support on a veranda, a median strip on a road, a support such as a card rail, etc. with the lower end portion thereof embedded.

[0022]

[Effect of device]

 The waste frame used in the temporary construction method according to the present invention as described above is integrally molded into a plate shape, so that space saving for storage or transportation can be achieved and the handling can be easily performed. Further, after arranging on the outer side of the temporary member, it is possible to accurately position the outer surface of the temporary member and the gap holding member between the outer member and the space holding member, for example, from above. Can be regulated. In addition, when a concrete holding member is provided on the inner surface, at the place where the temporary member is erected vertically in the concrete part, after removing the temporary member, the through hole formed in the removal trace of this When the concrete is backfilled with concrete, the holding member is simply folded back in the direction of closing the through hole, and the work can be performed without disposing the formwork below the through hole through the support. In addition, since this remains in the concrete part after the concrete is placed, the generation of waste materials is reduced.

[Brief description of drawings]

FIG. 1 is an explanatory vertical sectional view showing an outline of a basement floor construction work of a concrete building having a basement floor, for example.

FIG. 2 is a perspective view showing an assembled state of constituent parts of a pair of scrap frames according to the present invention divided into two parts.

FIG. 3 is a front view showing an outer side surface in an assembled state.

FIG. 4 is a plan view of the same.

FIG. 5 is a front view showing an inner surface of the same.

FIG. 6 is a front view showing an outer side surface in a deployed state.

FIG. 7 is a plan view of the same.

FIG. 8 is a front view showing the inner surface of the same.

9 is an enlarged end view taken along the line AA in FIG.

FIG. 10 is an enlarged end view of BB in FIG.

FIG. 11 is a vertical cross-sectional explanatory view showing the construction process sequence of the concrete building using the scrap frame according to the present invention.

FIG. 12 is a vertical cross-sectional explanatory view showing the construction process sequence of the concrete building using the scrap frame according to the present invention.

FIG. 13 is a vertical cross-sectional explanatory view showing the construction process sequence of a concrete building using a scrap frame according to the present invention.

FIG. 14 is an explanatory cross-sectional view showing the order of steps for constructing a concrete building using the scrap frame according to the present invention.

FIG. 15 is a vertical cross-sectional explanatory view showing the construction process sequence of the concrete building using the scrap frame according to the present invention.

FIG. 16 is a vertical cross-sectional explanatory diagram showing the construction process sequence of the concrete building using the scrap frame according to the present invention.

FIG. 17 is a vertical cross-sectional explanatory diagram showing the construction process sequence of the concrete building using the scrap frame according to the present invention.

FIG. 18 is an explanatory vertical cross-sectional view showing the construction process sequence of the concrete building using the scrap frame according to the present invention.

FIG. 19 is a vertical cross-sectional explanatory view showing the construction process sequence of the concrete building using the scrap frame according to the present invention.

FIG. 20 is a perspective view showing a conventional release member.

[Explanation of symbols]

 1 Sheet pile 2 Earth retaining wall 3 Temporary pile 4 Temporary ground floor 5 Excavator 6 Concrete slab 7 Constituent part 8 Releasing member 10 Waste form frame 11 Anchor part 12 Locking part 13 Constituent part 14 Auxiliary anchor part 15 Bending part 16 Core material 17 Notched edge 18 Holding member 19 Auxiliary holding member 20 Slab formwork 21 Sealing member 22 Interval holding member

Front page continued (72) Inventor Atsushi Yoshimoto Tokushima Prefecture, Kawashima Town, Kawashima Town, Mitsushima, Nitta No. 179-1 Nihon Funen Co., Ltd. No. 1 within Nippon Funen Co., Ltd. (72) Inventor Hiroshi Ito No. 179 Nitta, Niigata, Mitsushima, Kawashima-cho, Asa-gun, Tokushima Prefecture

Claims (4)

[Scope of utility model registration request] 1. A bent portion having a size such that there is a gap between the outer surface of the temporary member and the connecting angle of the temporary member so that the outer shape of the cross section of the temporary member is substantially the same as the cross section. Are provided transversely in the width direction, the anchor part is formed on the surface corresponding to the outer surface, and the locking part is formed on the surface corresponding to the inner surface. A scrap frame used in the temporary construction method in which a core material is internally installed in the vertical direction and integrally molded into a plate shape. 2. The core material is placed inside the bent portion so as to be positioned on the outer side of the bent portion, and both side edges on the inner side of the bent portion of the bent portion are provided with diagonally cut-out edge portions facing each other. Claim 1
A scrap frame used in the described temporary construction method. 3. The concrete holding member according to claim 1 or 2, wherein a concrete holding member is provided along the portion corresponding to the upper portion of the inner side surface to the portion corresponding to the upper portion, and the portion corresponding to the lower portion is backfilled so that it can be folded back. A formwork used in the temporary construction method of. 4. The scrap frame used in the temporary construction method according to claim 3, wherein the holding member is formed of wire mesh.