JP4017143B2 - Shaft rebar assembly method and assembly apparatus - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a shaft reinforcement assembling method and assembly apparatus, and more particularly, to a shaft reinforcement assembling method and assembly apparatus for on-site concrete such as piles and linings.
[0002]
[Background Art and Problems to be Solved by the Invention]
In general, when constructing piles or linings, it is practiced to place concrete in the field by placing reinforcing bars in the excavated shaft.
[0003]
For example, in deep foundation piles, when the main reinforcement is doubled, it is constructed in the following process.
[0004]
First, a set-up bar is attached to the liner plate in the shaft while assembling a scaffold in the shaft.
[0005]
Next, the outer hoop bars divided into two to three are suspended in the shaft by a tow truck, and the outer hoop bars are connected to the setup bars by connecting the outer hoop bars with the joints while assembling the scaffolds from the lowest level to the upper level.
[0006]
Next, the outer main muscle is suspended by a tow truck, and the outer main muscle and the outer hoop muscle are connected using a scaffold.
[0007]
Next, dismantle the scaffold.
[0008]
In this state, the inner hoop bars divided into two or three parts are suspended in the shaft by a tow truck, and the inner hoop bars are connected to the set-up bars by assembling the scaffolds from the lowest level to the upper level in order.
[0009]
Next, the inner main muscle is suspended by a tow truck, and the inner main muscle and the inner hoop muscle are connected using a scaffold.
[0010]
Then, the scaffold is dismantled and concrete is placed in the shaft.
[0011]
However, when such construction is carried out, the inner and outer hoops are assembled one by one in the shaft, increasing the work of hanging by the tow truck, and when the scaffold is assembled, the inner and outer hoops When the muscle is suspended, the inner and outer hoop muscles and the scaffold interfere with each other, increasing the number of times the scaffold is assembled and dismantled, lengthening the construction period, and increasing the construction cost.
[0012]
Moreover, when the inner and outer hoop bars become thicker, the work efficiency within the shaft is further reduced, and the bar arrangement accuracy is also reduced.
[0013]
An object of the present invention is to provide a shaft rebar assembling method and an assembling apparatus capable of shortening the work period of rebar assembly in a shaft, reducing costs, and ensuring assembly accuracy.
[0014]
[Means for Solving the Problems]
In order to achieve the above object, the shaft rebar assembly method of the present invention includes a step of forming a scaffold for rebar assembly in an excavated shaft,
A step of temporarily assembling the hoop muscles into a plurality of stages using an assembly device on the ground around the shaft;
A step of sequentially carrying the temporarily assembled hoop bars of the plurality of stages into the shaft and connecting the hoop bars of the respective stages into the shaft using the scaffold; and
Inserting the main muscle into the shaft and connecting the main muscle and the hoop muscle using the scaffold;
Dismantling and unloading the scaffold;
Only including,
The assembly apparatus has a hoop muscle support member that is detachably provided at least at three positions with respect to the base member,
After the hoop muscles are temporarily assembled to the hoop muscle support member in a plurality of stages, the hoop muscle support members are lifted to carry the temporarily assembled hoop muscles into the shaft, and after the carry-in, only the hoop muscle support members are carried out. It has the process .
[0015]
According to the present invention, the hoop bars are temporarily divided into a plurality of stages using an assembly device on the ground around the shaft, and the hoop bars of a plurality of stages are collectively suspended and attached in the shaft. It is possible to reduce the number of times the suspension work is suspended by the tow truck.In addition, since the hoop is suspended in the assembled state, there is no interference with the scaffold, and the number of assembly and dismantling operations can be reduced. The construction period can be shortened and the cost can be reduced.
[0016]
Moreover, since the hoop muscles are assembled on the ground, even if the hoop muscles become thick, the working efficiency is good and the bar arrangement accuracy is also good.
[0017]
In the present invention, the scaffold is formed leaving a gap in which the temporarily assembled hoop muscle can be installed between the shaft inner wall and the shaft.
[0018]
By setting it as such a structure, the hoop reinforcement | strength reliably temporarily assembled can be suspended and attached in a shaft.
[0020]
Also , if the hoop muscle is suspended while the hoop muscle support member is supported on the hoop muscle support member, and only the hoop muscle support member is taken out after the hoop muscle is attached, the temporary assembly, loading and mounting of the hoop muscle can be performed easily and reliably. It can be carried out.
[0021]
The assembly apparatus of the present invention includes a base member having a stand member at at least three positions corresponding to the diameter of the hoop muscle,
At least three hoop muscle support members detachably installed on the base member via the stand member;
A plurality of temporary assembling means for temporarily assembling a plurality of stages of hoop muscles into a ring at a predetermined pitch on the hoop muscle supporting member;
It is characterized by having.
[0022]
According to the present invention, the hoop muscles can be easily temporarily assembled to the hoop muscle support member erected on the stand member using the temporary assembly means, and a plurality of hoop muscles are temporarily assembled to the hoop muscle support member. If the hoop muscle support member is removed from the stand member, the hoop muscle can be transported together with the hoop muscle support member, and the hoop muscle can be easily transported. If released, the hoop muscle support member can be easily taken out.
[0023]
Moreover, since there are at least three hoop muscle support members, the annular hoop muscle can be stably supported.
[0024]
In the present invention, it is possible to have a lifting jig that enables the hoop muscle support member to be lifted vertically.
[0025]
By setting it as such a structure, a hoop line | wire can be reliably conveyed, maintaining a horizontal state with a suspension jig.
[0026]
Further, in the present invention, the temporary assembly means includes a plurality of temporary assembly holes formed at a predetermined pitch in the hoop muscle support member,
The temporary assembly pin may be inserted into the temporary assembly hole and support the hoop muscle.
[0027]
With such a configuration, the hoop muscle can be supported and released with a simple configuration.
[0028]
The temporary assembly means may be provided on the hoop muscle support member so as to be foldable at a predetermined pitch, and has a plurality of temporary assembly pins that support the hoop muscle.
[0029]
By adopting such a configuration, the hoop muscle is temporarily assembled with the temporary assembly pin protruding, the hoop muscle is attached within the shaft, and then the temporary assembly pin is folded to easily support the hoop muscle support member from the hoop muscle. Can be removed.
[0030]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
[0031]
1-4 is a figure which shows the shaft rebar assembly method which concerns on one embodiment of this invention.
[0032]
FIG. 1 is a diagram showing an overall configuration of a shaft reinforcing bar assembling method according to the present embodiment.
[0033]
This shaft rebar assembly method is used to construct deep foundation piles. First, as shown in FIG. 1 (1), after excavating the shaft 10, while assembling the scaffolding 12 in the shaft 10, The setup bar 14 is attached to the liner plate.
[0034]
In this case, the scaffold 12 is brought into a state in which the outer peripheral portion protrudes toward the liner plate and approaches the liner plate, and the setup bars 14 are attached in this state.
[0035]
Next, as shown in FIG. 2B, the hoop bars 20 are temporarily assembled in a plurality of stages using the assembly device 18 on the ground 16 around the shaft 10.
[0036]
Specifically, as shown in FIGS. 2 to 4, the assembling apparatus 18 includes a base member 22, a hoop muscle support member 24, and temporary assembly means 26.
[0037]
The base member 22 includes a base plate 28 and a base mold 30.
[0038]
The base plate 28 is made of a hexagonal iron plate and is installed horizontally on the ground 16.
[0039]
The base mold 30 is formed of six H-shaped steels fixed on the base plate 28 with bolts or the like so as to project radially from the central side of the base plate 28 through hexagonal corners.
[0040]
Further, a stand member 32 is provided on the protruding tip of each base mold 30.
[0041]
As shown in FIG. 4, the stand member 32 is engaged with a flange portion 34 of each base mold member 30 so as to be slidable in a radial direction, and can be fixed by a bolt 36 at a predetermined position. And an insertion portion 40 made of a square pipe provided so as to protrude upward from the upper surface of the portion 38.
[0042]
The hoop reinforcement support member 24 has a length that can support a plurality of, for example, six stages of the hoop reinforcement 20 at a predetermined arrangement pitch, and can be inserted into a stand member 32 of each base mold 30 and can stand upright. It consists of six square steel pipes.
[0043]
The temporary assembly means 26 includes a plurality of, for example, six temporary assembly holes 42 formed through the hoop muscle support member 24 in accordance with a predetermined bar arrangement pitch, and is inserted into the temporary assembly holes 42 so as to pass the hoop muscle 20. A temporary assembly pin 44 to support.
[0044]
At the time of temporary assembly, first, the base plate 28 is installed horizontally on the ground 16, the base mold 30 is installed radially on the base plate 28 and fixed with bolts, and the stand member 32 is adjusted to the diameter of the hoop muscle 20. Secure with bolts 36.
[0045]
Next, after inserting the hoop muscle support member 24 into the insertion portion 40 of the stand member 32 and standing, the temporary assembly pin 44 is inserted into the temporary assembly hole 42 of the hoop muscle support member 24.
[0046]
In this state, the outer hoop muscles 20a and the inner hoop muscles 20b are temporarily mounted on the temporary assembly pins 44, and the six-stage hoop muscles 20 are temporarily assembled in an annular shape.
[0047]
Next, as shown in FIG. 2, the lifting jig 46 is connected to the upper end of each hoop bar support member 24 and lifted to remove the hoop bar support member 24 from the insertion portion 40.
[0048]
The suspension jig 46 can be suspended from the suspension hook 50 via a wire 48 and has a ring member 52 having a diameter corresponding to the diameter of the hoop muscle 20, and a position 6 corresponding to the hoop muscle support member 24 of the ring member 52. And a suspension wire 54 suspended from the point.
[0049]
And the lower end of this suspension wire 54 is connected with the upper end of the hoop muscle support member 24, and the hoop muscle support member 24 can be lifted vertically.
[0050]
When the hoop muscle support member 24 is lifted by the lifting jig 46 in the state where the temporary assembly of the six steps of the hoop muscle 20 has been completed, the six steps of the hoop muscle 20 temporarily assembled on the hoop muscle support member 24 are performed. In this state, as shown in FIG. 1 (3), the temporarily assembled hoop bars 20 are carried into the shaft 10, and the hoop bars 20 are bound to the set-up bars 14 at predetermined positions. After binding, the temporary assembly pin 44 is extracted, and only the hoop muscle support member 24 is lifted and removed.
[0051]
The temporary assembly of the multi-stage hoop muscles 20, the carrying into the shaft 10, and the binding of the hoop muscles 20 to the set-up bars 14 are repeated. For example, the connection of the hoop muscles 20 is repeated 6 times using the scaffold 12. And repeat.
[0052]
When the temporarily assembled hoop bar 20 is carried into the shaft 10, the scaffold 12 for attaching the setup bar 14 is removed, and the temporarily assembled hoop bar 20 is installed between the inner wall of the shaft 10 and the scaffold 12. I try to leave possible voids.
[0053]
As a result, the hoop muscle 20 that has been formed into a hoop shape can be surely inserted into the gap between the inner wall of the shaft 10 and the scaffold 12, and the hoop muscle 20 suspended by the suspension jig can be kept in a horizontal state. It can be maintained and carried vertically.
[0054]
In addition, by dividing the hoop bars 20 into a plurality of stages and temporarily assembling, the plurality of stages of hoop bars 20 can be suspended and attached in the shaft 10, and the number of suspension operations can be reduced. Moreover, the hoop muscle 20 can be suspended without interfering with the scaffold 12, the number of scaffold assembly and disassembly operations can be reduced, and the construction period can be shortened and the cost can be reduced.
[0055]
Furthermore, since the hoop muscles 20 are assembled on the ground, even if the hoop muscles 20 are thick, the work efficiency is good and the bar arrangement accuracy can be good.
[0056]
Next, as shown in FIG. 1 (4), the outer main muscle 56a and the inner main muscle 56b are inserted into the shaft 10, and the outer main muscle 56a and the inner hoop muscle 20a are connected, and the inner main muscle 56b and the inner hoop muscle 20b are connected.
[0057]
Next, as shown in FIG. 1 (5), the scaffold 12 is disassembled and carried out to the ground.
[0058]
In this state, the concrete placement pipe 58 is disposed in the shaft 10 and the concrete placement pipe 58 is placed in the shaft 10 from the concrete placement pipe 58 to form a deep foundation pile. Like to do.
[0059]
The present invention is not limited to the above-described embodiment, and can be modified into various forms within the scope of the gist of the present invention.
[0060]
For example, in the above-described embodiment, the case where the shaft rebar assembly method is used for constructing a deep foundation pile is described. However, the present invention is not limited to this example, and is used for construction of a shaft using on-site concrete such as a start shaft and a reaching shaft. It is also possible.
[0061]
Moreover, in the said embodiment, although the thing which consists of a base plate and a base mold material is used as a base member of an assembly apparatus, it is not restricted to this example, A base member is directly attached to a base plate, or a base plate is not used. It is also possible to use what directly joined together.
[0062]
Furthermore, in the above-described embodiment, the setup line is attached while assembling the scaffold. However, the setup line may be installed on the liner plate in advance.
[0063]
Further, although six hoop muscle support members are used, it is sufficient if three or more hoop muscle support members are used.
[0064]
Furthermore, when the hoop bars are temporarily assembled by the assembling apparatus, the main bars having a length corresponding to the number of stages may be temporarily combined to connect the main bars within the shaft.
[0065]
Further, the temporary assembly means is not limited to the one using the hole and the pin, and the protruding member may be provided on the hoop muscle support member so as to be foldable.
[0066]
Furthermore, in the said embodiment, although the inner and outer double hoop muscles and the main muscles are arranged, it can also be a single arrangement.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view showing a shaft reinforcing bar assembling method according to an embodiment of the present invention, wherein (1) shows a mounting state of a scaffold and a setup bar, and (2) shows a temporarily assembled state of a hoop bar. , (3) shows the state of carrying in the hoop muscle, (4) shows the inserted state of the main muscle, (5) shows the state of dismantling and carrying out the scaffold, and (6) shows the state of placing concrete.
FIG. 2 is a side view of the assembling apparatus.
FIG. 3 is a plan view of the assembling apparatus.
FIG. 4 is a cross-sectional view showing a stand member and temporary assembly means of the assembling apparatus.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 Vertical shaft 12 Scaffolding 14 Set-up reinforcement 16 Ground 18 Assembly apparatus 20 Hoop reinforcement 22 Base member 24 Hoop reinforcement support member 26 Temporary assembly means 32 Stand member 42 Temporary assembly hole 44 Temporary assembly pin 46 Suspension jig 56a Outer main reinforcement 56b Inner main reinforcement

Claims (4)

Forming a scaffold for rebar assembly in the excavated shaft;
A step of temporarily assembling the hoop muscles into a plurality of stages using an assembly device on the ground around the shaft;
A step of sequentially carrying the temporarily assembled hoop bars of the plurality of stages into the shaft and connecting the hoop bars of the respective stages into the shaft using the scaffold; and
Inserting the main muscle into the shaft and connecting the main muscle and the hoop muscle using the scaffold;
Dismantling and unloading the scaffold;
Only including,
The assembly apparatus has a hoop muscle support member that is detachably provided at least at three positions with respect to the base member,
After the hoop muscles are temporarily assembled to the hoop muscle support member in a plurality of stages, the hoop muscle support members are lifted to carry the temporarily assembled hoop muscles into the shaft, and after the carry-in, only the hoop muscle support members are carried out. A shaft rebar assembling method characterized by comprising a step . A base member having a stand member at at least three positions corresponding to the diameter of the hoop,
At least three hoop muscle support members detachably installed on the base member via the stand member;
A plurality of temporary assembling means for temporarily assembling a plurality of stages of hoop muscles into a ring at a predetermined pitch on the hoop muscle supporting member;
The assembly apparatus characterized by having. In claim 2 ,
The temporary assembly means includes a plurality of temporary assembly holes formed at a predetermined pitch in the hoop muscle support member;
An assembly apparatus comprising: a temporary assembly pin that is inserted into the temporary assembly hole and supports the hoop muscle. In claim 2 ,
The assembly apparatus according to claim 1, wherein the temporary assembly means includes a plurality of temporary assembly pins that are provided on the hoop muscle support member so as to be foldable at a predetermined pitch and support the hoop muscle.

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