JPH09242084A - Form for underground beam and work method of foundation form - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable work without occupying an upper space for a long time by protruding the steel reinforcement fixed at the concrete placement gap of form body assembled with a side frame board through a specified interval, from the mold main body by a spefified length. SOLUTION: In a form main body 11, two side frame board 114 are assembled at a spefified distance via a locking board(s) at top end, center and lower end parts, and a concrete placement gap is formed inside thereof. The board 114 ensures light weightness and a specified pressure resistive strength by the adoption of thin corrugated board and a separater is layed between both side frame boards through a washer. A steel reinforcement 12 is composed of a main reinforcement 121 arranged in multiple steps in the lengthwise direction of the body 11, a hoop reinforcement 122 encircling the whole circumference of the main reinforcement 121 and a mid part reinforcement layed over the main reinforcement at the intermediate portion. They are assembled by welding, connection of annealing wires, etc. To avoid concentration of stress on the seam of connection part, the protruding length of each main reinforcement 121 is made different and they are made to protrude from an end opening of the body 11.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for constructing a formwork for an underground beam and a foundation formwork. More specifically, the present invention relates to an improvement in the reinforcing bar reinforcing structure in an underground beam formwork, and a new method of constructing a basic formwork using this underground beam formwork.

[0002]

2. Description of the Related Art Conventionally, as a basic formwork and a method of constructing a basic formwork, for example, Japanese Patent Application Laid-Open No. 6-3 has been previously proposed by the present applicant.
There is one described in No. 46463.

The basic formwork and the method of constructing the basic formwork proposed by the applicant of the present invention are a unit type waste formwork, which aims to reduce the amount of overcutting of the root cutting groove, etc. The above structure is one in which a reinforcing bar is assembled above the basic formwork built in the root cutting groove, and the steel is dropped inside the basic formwork as it is and arranged.

[0004]

SUMMARY OF THE INVENTION In the above-mentioned conventional basic formwork and construction method of the basic formwork proposed by the applicant of the present invention, when the rebar is sunk, the reinforcing bar is used as the frame of the basic formwork. A reinforcement work for positioning and adjusting the plate and the like is required, but there is a problem that the reinforcement work becomes difficult when the base formwork is a narrow underground beam formwork. In addition, the work of assembling the reinforcing bars occupies the space above the foundation formwork for a long time, which causes a problem that it interferes with other works.

The present invention has been made in consideration of the above problems, and almost eliminates the need for reinforcement work and reinforcement work, and enables construction without occupying the upper space for a long time. It is an object to provide a formwork for an underground beam and a method of constructing a base formwork using the formwork for an underground beam.

[0006]

In order to solve the above-mentioned problems, in the underground beam formwork according to the present invention, as described in claim 1, side frame plates are assembled at least at certain intervals. A means comprising a main frame body having a concrete pouring gap inside and a reinforcing bar fixed in the concrete pouring gap of the main frame body and projecting a certain length from the end opening of the main frame body is adopted.

According to a second aspect of the present invention, there is provided a method for constructing a foundation formwork, wherein after the independent foundation formwork is built, the underground beam formwork according to the first aspect is carried out. It is built by dropping it into the root cutting groove for the beam, and the reinforcing bars protruding from the end openings of the underground beam formwork are thrust into the inside of the independent foundation formwork, and inside the independent foundation formwork is used for the underground beam formwork. It is characterized in that the reinforcing bars of the frame are connected directly or indirectly.

According to the above-mentioned means, according to the first aspect, since the reinforcing bars are fixed to the form body, the reinforcing bars are completed when the form body is installed. The formwork body and the rebar can be manufactured integrally at the factory and brought to the construction site. The reinforcing bar protruding from the end opening of the mold body is used for connection with the reinforcing bar of another mold body.

According to the second aspect of the present invention, the reinforcing bars are connected within the relatively wide independent foundation formwork under relatively easy work.

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of a method for constructing a formwork for an underground beam and a base formwork according to the present invention will be described below with reference to the drawings.

As shown in FIGS. 1 and 2, the underground beam formwork 1 which constitutes a part of the base formwork of this embodiment has a formwork body 1 as shown in FIGS.
1, a rebar 12, and a spacer 13.

As shown in detail in FIG. 2, the formwork main body 11 has two side surfaces facing each other at regular intervals via a top end anti-rotation stop plate 111, a center anti-rotation stop plate 112, and a lower end anti-rotation stop plate 113. The frame plate 114 is assembled and a concrete pouring gap 115 is formed inside. The side frame plate 114 is made of a corrugated sheet made of a thin material, so that weight saving and constant pressure resistance are secured. The side surface frame plate 114, the top end anti-slipping plate 111, and the bottom end anti-slipping plate 113 are fixed by a bolt 117 via an L-shaped angle 116. The side frame plate 114 and the center anti-sway plate 112 are fixed by welding. Further, the washers 11 are provided between the frame plates 114 on both sides.
The separator 119 is bridged via the No. 8.

As shown in detail in FIG. 2, the reinforcing bar 12 has main bars 121 arranged in a plurality of steps in the length direction of the form body 11, and hoop bars 122 surrounding the entire main bar 121.
And an abdominal muscle 123 stretched over the main muscle 121 in the middle section. This main muscle 121, hoop muscle 122, abdominal muscle 12
3 is assembled by welding, tie-up of wire, or the like. In addition, the hoop muscle 122 and the separator 119 of the mold body 11
And are fixed by spot welding. In addition, as shown in FIG. 1, the reinforcing bar 12 projects from the end opening of the mold body 11 by a certain length. However, the projecting length of each of the main bars 121 of the projecting reinforcing bar 12 is set to be non-uniform, so that stress is prevented from concentrating at joints of the connection described later.

The spacer 13 is formed in a chevron shape and is fixed to the lower end anti-flare plate 113 of the mold body 11 to support the entire reinforcing bar 12 in the longitudinal direction. or,
A pair of truss bars 14 can be attached to the inner wall of the lower end of the mold body 11 along the length direction. As a result, the bending of the form body 11 and the reinforcing bar 12 can be reinforced.

In the underground beam formwork 1 of this embodiment, the whole of the formwork body 11, the rebar 12, and the spacer 13 is firmly fixed through the separator 119 of the form body 11 and the hoop reinforcement 122 of the rebar 12. It is assembled. Therefore, the whole can be manufactured in a factory and transported to a construction site by a truck or the like without being damaged. Further, after being transported to the construction site, it can be hung by a crane or the like and dropped into the root cutting groove 2 for the underground beam to be built. It should be noted that the completion of the building of the underground beam formwork 1 is completed because the frame body 11 and the reinforcing bar 12 are integrated so that the reinforcing bar 12 in the concrete placing gap 115 of the underground beam formwork 1 is removed. It also means the completion of bar arrangement.

For this reason, according to this embodiment, the rebar work and the rebar assist work inside the concrete pouring gap 115 of the narrow underground beam form 1 are unnecessary, so that the formwork construction period Will be shortened. Further, since the space above the root cutting groove 2 for the underground beam is not occupied for a long time, the construction period of the entire construction is shortened without interfering with other constructions.

The underground beam formwork 1 of this embodiment is installed in the root beam groove 2 for the underground beam, so that the portion of the reinforcing bar 12 protruding from the end opening of the formwork body 11 is the basic formwork. It will plunge into the inside of the independent foundation mold 3 that constitutes another part.

That is, the independent foundation form 3 is built in the square root incision 42 for the independent foundation, which is communicated with the root-cutting groove 2 for the underground beam. A connection window 32 for connecting the underground beam formwork 1 is opened at 31.

Inside the independent foundation form 3, the main bars 121 of the intruded reinforcing bars 12 are connected.

In this connection, as shown in FIG. 3, the projecting end is abutted against the upper main bar 121 by using the coupler joint (sleeve joint) metal fitting 5, and the joint of the connection becomes an obstacle to the concrete pouring. It is configured so as not to be deformed by the set pressure. In addition, for example, it is also possible to abut by gas pressure welding. Further, for the lower main bar 121, a lap joint in which the protruding ends are overlapped and adjoined for a certain length is selected.

When the underground beam formwork 1 is connected in four directions of the independent foundation formwork 3, the structure shown in FIG. The auxiliary reinforcing bar 6 as shown in FIG. 4 is used on the connecting side in two directions. That is, the projecting length of the reinforcing bar 12 on the connecting side in the following two directions is shortened to a length that avoids the connecting width of the reinforcing bar 12 on the connecting side in the preceding two directions, and the length that is insufficient for the connecting is separately assisted. Reinforcement 6 is used for continuous connection. In addition, in FIG.
21 shows an example in which they are abutted against each other by gas pressure welding.

Furthermore, the main bar 12 of the reinforcing bar 12 of this embodiment
When 1 is not a deformed steel bar having an uneven portion on the surface but a round steel bar, an anchor 7 for fixing is used as shown in FIG. The anchor 7 is formed by bending the main bar 121 from the joint portion shown in FIGS.

These connecting work and fixing work are performed inside the relatively wide independent foundation form 3, and the work itself is simple, so that they can be easily performed. In particular, since it is possible to perform the work in parallel with and parallel with the column reinforcing work in the independent foundation form 3, there is no adverse effect that special work is added.

As described above, in addition to the illustrated embodiment, the frame plate body 1
1, the side frame plate 114 is welded and fixed to the bottom frame plate to form a U-shape, and the top end stop plate 111, the center stop plate 112,
It is also possible to adopt an embodiment in which the lower end anti-flare plate 113 and the separator 119 are removed. According to this embodiment, the number of members of the frame plate body 11 is reduced and the structure is simplified.

Further, it is possible to provide an embodiment in which a fixing structure is provided between the underground beam form 1 and the connection window 32 of the independent foundation form 3 to firmly fix them. According to this embodiment, the gap between the underground beam formwork 1 and the independent foundation formwork 3 is prevented, and unnecessary stress is not applied to the reinforcing bar 12.

[0026]

As described above, in the method of constructing a formwork for an underground girder and a foundation formwork according to the present invention, the reinforcement of reinforcing bars is completed by the completion of the installation of the formwork for an underground beam. This has the effect that almost no reinforcement work or reinforcement work is required inside a narrow underground beam formwork. Further, due to this effect, there is an effect that the construction period of the formwork is shortened.

Further, since the space above the underground beam formwork is not occupied for a long time, there is an effect that it does not interfere with other works. Therefore, there is an effect that the construction period of the entire construction is shortened.

Further, since only the underground beam formwork according to the present invention has the reinforcing bars protruding from the end openings of the underground beam formwork, there is an effect that the reinforcing bars can be connected by a simple work. .

Further, as the method of constructing the base form according to the present invention only, since the connecting work of the reinforcing bar is performed inside the relatively wide independent formwork, the connecting work of the reinforcing bar is facilitated.

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment of a method for constructing a formwork for an underground beam and a base formwork according to the present invention.

FIG. 2 is a cross-sectional view showing an embodiment of the underground beam formwork according to the present invention.

FIG. 3 is a perspective view of a main part showing an example of connecting the reinforcing bars in FIG.

FIG. 4 is a perspective view showing a modified example of FIG.

5 is a cross-sectional view of a main part showing an example of fixing the reinforcing bars in FIG.

[Explanation of symbols] 1 Formwork for underground beam 11 Formwork body 114 Side form plate 115 Concrete placing gap 12 Reinforcing bar 121 Main bar 2 Root cutting groove for underground beam 3 Formwork for independent foundation

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[Procedure amendment]

[Submission date] March 13, 1996

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] Full text

[Correction method] Change

[Correction contents]

[Document Name] Statement

[Title of Invention] Construction method for underground beam formwork and foundation formwork

[Claims]

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for constructing a formwork for an underground beam and a foundation formwork. More specifically, the present invention relates to an improvement relating to the reinforcing bar reinforcing structure in an underground beam formwork, and a method for constructing a new foundation formwork using this underground beam formwork.

[0002]

2. Description of the Related Art Conventionally, as a basic formwork and a method of constructing a basic formwork, for example, Japanese Patent Application Laid-Open No. 6-3 has been previously proposed by the present applicant.
There is one described in No. 4643.

The basic formwork and the method of constructing the basic formwork proposed by the applicant of the present invention are a unit type waste formwork, which aims to reduce the amount of overcutting of the root cutting groove, etc. The above structure is one in which a reinforcing bar is assembled above the basic formwork built in the root cutting groove, and the steel is dropped inside the basic formwork as it is and arranged.

[0004]

SUMMARY OF THE INVENTION In the above-mentioned conventional basic formwork and construction method of the basic formwork proposed by the applicant of the present invention, when the rebar is sunk, the reinforcing bar is used as the frame of the basic formwork. A reinforcement work for positioning and adjusting the plate and the like is required, but there is a problem that the reinforcement work becomes difficult when the base formwork is a narrow underground beam formwork. In addition, the work of assembling the reinforcing bars occupies the space above the foundation formwork for a long time, which causes a problem that it interferes with other works.

The present invention has been made in consideration of the above problems, and almost eliminates the need for reinforcement work and reinforcement work, and enables construction without occupying the upper space for a long time. It is an object to provide a formwork for an underground beam and a method of constructing a base formwork using the formwork for an underground beam.

[0006]

In order to solve the above-mentioned problems, in the underground beam formwork according to the present invention, as described in claim 1, side frame plates are assembled at least at certain intervals. A means comprising a main frame body having a concrete pouring gap inside and a reinforcing bar fixed in the concrete pouring gap of the main frame body and projecting a certain length from the end opening of the main frame body is adopted.

According to this means, the reinforcing bars are fixed to the form body, so that when the form body is built in, the reinforcing bar reinforcement is completed. The formwork body and the rebar can be manufactured integrally at the factory and brought to the construction site. The reinforcing bar protruding from the end opening of the mold body is used for connection with the reinforcing bar of another mold body.

Further, in the method for constructing a foundation formwork according to the present invention, as described in claim 2, after the independent foundation formwork is built, the underground beam formwork of claim 1 is underground. It is built by dropping it into the root cutting groove for the beam, and the reinforcing bars protruding from the end openings of the underground beam formwork are thrust into the independent foundation formwork, and the underground beam formwork is used inside the independent foundation formwork. It is characterized in that the reinforcing bars of the frame are connected directly or indirectly.

According to this means, the reinforcing bars are connected inside the relatively wide independent foundation formwork under relatively easy work.

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of a method for constructing a formwork for an underground beam and a base formwork according to the present invention will be described below with reference to the drawings.

As shown in FIGS. 1 and 2, the underground beam formwork 1 constituting a part of the basic formwork of this embodiment comprises a formwork body 11, reinforcing bars 12 and spacers 13.

As shown in detail in FIG. 2, the formwork main body 11 has two side surfaces facing each other at regular intervals via a top end anti-rotation stop plate 111, a center anti-rotation stop plate 112, and a lower end anti-rotation stop plate 113. The frame plate 114 is assembled and a concrete pouring gap 115 is formed inside. The side frame plate 114 is made of a corrugated sheet made of a thin material, so that weight saving and constant pressure resistance are secured. The side surface frame plate 114, the top end anti-slipping plate 111, and the bottom end anti-slipping plate 113 are fixed by a bolt 117 via an L-shaped angle 116. The side frame plate 114 and the center anti-sway plate 112 are fixed by welding. Further, the washers 11 are provided between the frame plates 114 on both sides.
The separator 119 is bridged via the No. 8.

As shown in detail in FIG. 2, the reinforcing bar 12 has main bars 121 arranged in a plurality of steps in the length direction of the form body 11, and hoop bars 122 surrounding the entire main bar 121.
And an abdominal muscle 123 stretched over the main muscle 121 in the middle section. This main muscle 121, hoop muscle 122, abdominal muscle 12
3 is assembled by welding, tie-up of wire, or the like. In addition, the hoop muscle 122 and the separator 119 of the mold body 11
And are fixed by spot welding. In addition, as shown in FIG. 1, the reinforcing bar 12 projects from the end opening of the mold body 11 by a certain length. However, the projecting length of each main bar 121 of the projecting reinforcing bar 12 is set to be non-uniform, and stress is prevented from concentrating on the joint of the connection to be described later.

The spacer 13 is formed in a chevron shape and is fixed to the lower end anti-flare plate 113 of the mold body 11 to support the entire reinforcing bar 12 in the longitudinal direction. or,
A pair of truss bars 14 can be attached to the inner wall of the lower end of the mold body 11 along the length direction. As a result, the bending of the form body 11 and the reinforcing bar 12 can be reinforced.

The underground beam formwork 1 of this embodiment includes a separator 119 of a formwork body 11 and a hoop reinforcement 12 of a reinforcing bar 12.
2 through the form body 11, rebar 12, spacer 13
The whole is firmly assembled. Therefore, the whole can be manufactured in a factory and transported to a construction site by a truck or the like without being damaged. Further, after being transported to the construction site, it can be hung by a crane or the like and dropped into the root cutting groove 2 for the underground beam to be built. It should be noted that the completion of the building of the underground beam formwork 1 is completed because the frame body 11 and the reinforcing bar 12 are integrated so that the reinforcing bar 12 in the concrete placing gap 115 of the underground beam formwork 1 is removed. It also means the completion of bar arrangement.

For this reason, according to this embodiment, since the work of reinforcing the bar and the assisting work of the reinforcing bar inside the concrete placing gap 115 of the narrow underground beam form 1 are unnecessary, the formwork construction is carried out. The period will be shortened. Further, since the space above the root cutting groove 2 for the underground beam is not occupied for a long time, the construction period of the entire construction is shortened without interfering with other constructions.

The underground beam form 1 of this embodiment is built in the root beam groove 2 for the underground beam, so that the portion of the reinforcing bar 12 protruding from the end opening of the form body 11 is the basic form. It will plunge into the inside of the independent foundation form 3 that constitutes another part of the.

That is, the independent foundation form 3 is built in the square root incision 42 for the independent foundation, which is communicated with the root-cutting groove 2 for the underground beam. A connection window 32 for connecting the underground beam formwork 1 is opened at 31.

Inside the independent foundation form 3, the main bars 121 of the intruded reinforcing bars 12 are connected.

In this connection, as shown in FIG. 3, the projecting end is abutted against the upper main bar 121 by using the coupler joint (sleeve joint) metal fitting 5, and the joint of the connection becomes an obstacle to the concrete pouring. It is configured so as not to be deformed by the set pressure. In addition, for example, it is also possible to abut by gas pressure welding. Further, for the lower main bar 121, a lap joint in which the protruding ends are overlapped and adjoined for a certain length is selected.

When the underground beam formwork 1 is connected in four directions of the independent foundation formwork 3, the structure shown in FIG. The auxiliary reinforcing bar 6 as shown in FIG. 4 is used on the connecting side in two directions. That is, the projecting length of the reinforcing bar 12 on the connecting side in the following two directions is shortened to a length that avoids the connecting width of the reinforcing bar 12 on the connecting side in the preceding two directions, and the length that is insufficient for the connecting is separately assisted. Reinforcement 6 is used for continuous connection. In addition, in FIG.
It is shown that 21 is abutted by gas pressure welding.

Further, when the main bar 121 of the reinforcing bar 12 of this embodiment is a round steel bar instead of a deformed steel bar having an uneven surface, as shown in FIG. 7 is used. The anchor 7 is formed by bending the main bar 121 from the joint portion shown in FIGS.

These connecting work and fixing work are performed inside the relatively wide independent foundation form 3, and the work itself is simple, so that they can be easily performed. In particular, since it is possible to perform the work in parallel with and parallel with the column reinforcing work in the independent foundation form 3, there is no adverse effect that special work is added.

As described above, in addition to the embodiment shown in the drawings, the frame plate body 11 is welded and fixed to the bottom frame plate and the side frame plate 114 is formed into a U-shape to form the top end anti-flare plate 111 and the central anti-flare plate. 11
It is also possible to adopt an embodiment in which the second bottom anti-skid plate 113 and the separator 119 are removed. According to this embodiment, the number of members of the frame plate body 11 is reduced and the structure is simplified.

Further, it is also possible to provide an embodiment in which a fixing structure for firmly fixing the underground beam form 1 and the connection window 32 of the independent foundation form 3 is provided between them. According to this embodiment, the gap between the underground beam formwork 1 and the independent foundation formwork 3 is prevented, and unnecessary stress is not applied to the reinforcing bar 12.

[0026]

As described above, in the method of constructing a formwork for an underground girder and a foundation formwork according to the present invention, the reinforcement of reinforcing bars is completed by the completion of the installation of the formwork for an underground beam. This has the effect that almost no reinforcement work or reinforcement work is required inside a narrow underground beam formwork. Further, due to this effect, there is an effect that the construction period of the formwork is shortened.

Further, since the space above the underground beam formwork is not occupied for a long time, there is an effect that it does not interfere with other works. Therefore, there is an effect that the construction period of the entire construction is shortened.

Further, since only the underground beam formwork according to the present invention has the reinforcing bars protruding from the end openings of the underground beam formwork, there is an effect that the reinforcing bars can be connected by a simple work. .

Further, as the method of constructing the base form according to the present invention only, since the connecting work of the reinforcing bar is performed inside the relatively wide independent formwork, the connecting work of the reinforcing bar is facilitated.

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment of a method of constructing a formwork for an underground beam and a base formwork according to the present invention.

FIG. 2 is a cross-sectional view showing an embodiment of a formwork for an underground beam according to the present invention.

FIG. 3 is a perspective view of a main part showing an example of connecting the reinforcing bars in FIG.

FIG. 4 is a perspective view showing a modified example of FIG.

5 is a cross-sectional view of a main part showing an example of fixing the reinforcing bars in FIG.

[Explanation of symbols] 1 Formwork for underground beam 11 Formwork body 114 Side form plate 115 Concrete placing gap 12 Reinforcing bar 121 Main bar 2 Root cutting groove for underground beam 3 Formwork for independent foundation

[Procedure amendment 2]

[Document name to be amended] Drawing

[Correction target item name] All figures

[Correction method] Change

[Correction contents]

[Figure 3]

FIG. 4

FIG.

[Fig. 2]

[Figure 5]

Claims (2)

[Claims] 1. A formwork main body in which side face frame plates are assembled at least at regular intervals and a concrete placing gap is provided inside, and a form main body fixed to the concrete placing gap of the formwork body by arranging reinforcement. Formwork for underground beams consisting of reinforcing bars protruding for a certain length from the end opening. 2. After building the independent foundation formwork, the underground beam formwork according to claim 1 is dropped into the root cutting groove for the underground beam and installed, and an end opening of the underground beam formwork is formed. A method of constructing a basic formwork, characterized in that the reinforcing bars projecting from the inside are rushed into the formwork for the independent foundation, and the reinforcing bars of the underground beam formwork are directly or indirectly connected inside the formwork for the independent foundation. .