JPH08128568A - Holding tool for boring sleeve pipe in reinforced concrete structure and boring method using this holding tool for reinforced concrete structure - Google Patents

Abstract

PURPOSE: To provide a holding tool for a sleeve pipe for a boring method using this holding tool for a reinforced concrete structure by which the sleeve pipe can be held without any shift or deflection of an axis and boring can be carried out in the predetermined position. CONSTITUTION: A holding tool 1 consists of a holding ring member 2 and flexible mounting wire members 3 which extend outward in at least three directions at approximately equal angles from the holding ring member 2. The holding ring member 2 in the holding tool 1 is arranged in a sleeve pipe 5 arrangement position of a reinforcement 9 by fixing each of the radial mounting wire members 3 in the nearest reinforcement, and the sleeve pipe 5 is passed through the holding ring member 2, while a concrete placing area is formed with formwork, and after hardening of the placed concrete, the formwork and the sleeve pipe 5 are removed, and consequently, a hole 10 is formed in a remaining hole from which the sleeve pipe 5 is pulled out, while the holding tool 1 is buried.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a holder for a sleeve tube for constructing holes in walls, floors, beams and the like of reinforced concrete structures and a method for constructing holes in reinforced concrete structures using the retainers.

[0002]

2. Description of the Related Art Conventionally, when constructing a hole in a reinforced concrete building, as shown in FIG. 9 and FIG.
Support rods 51 are erected on the front side and the back side, respectively, and a holder 52 is placed on the support rods 51 and loosely temporarily fixed with an iron wire 53, and then a sleeve tube 54 is inserted through both holders 52. , Formwork 55
Form a concrete pouring space 56 by pouring, after the concrete hardens, remove the form 55,
A hole is formed in the trace of 54. However, the temporarily fixed sleeve tube may move left and right on the support rod together with the retaining ring member due to the pressure of concrete during casting, in which case the axis of the sleeve tube is parallel. There is a problem that the hole cannot be formed at a predetermined position as a result because the work is moved and displaced, or shaken and the work is performed while being shaken.

The problem of the axial displacement can be solved if the sleeve pipe can be fixed to the support rod so as not to move. However, if the sleeve pipe is fixed, the sleeve pipe cannot move in the axial direction. When forming the concrete pouring space by the frame, it becomes impossible to move the sleeve tube in and out (axial movement: about 5 to 7 mm), which is required when the positional relationship between the reinforcing bars and the pouring space needs to be adjusted. Therefore, construction conditions will be limited.

[0004]

The problem to be solved by the invention is that the sleeve tube temporarily loosens the retaining ring member so that the sleeve tube can move in and out, so that the sleeve tube cannot be prevented from being displaced or shaken. That is, it is impossible to construct a hole at a predetermined position.

[0005]

In order to solve the above-mentioned problems, in a holder for a sleeve pipe for hole construction in a reinforced concrete structure, a holding ring member having a diameter capable of holding the sleeve pipe substantially concentrically, and this holding member. It is characterized in that it comprises a flexible attachment wire member that extends outwardly from the ring member in at least three directions in a substantially equiangular manner and can be fixed to the reinforcing bar.

In the holder of the present invention, the holding ring member is
It is characterized in that guide members along the axial direction are provided on at least three sides of the holding ring member at substantially equal intervals.

The holding ring member in the present invention is a press-formed product or a metal member formed by winding a rod in an annular shape, and the attachment wire member is a flexible metal which can be welded or entwined with a reinforcing bar to be fixed. It is made. Further, the guide member is a belt-shaped or rod-shaped member, is formed on the inner surface or the side surface of the holding ring member, and is made of metal.

In the method of constructing a hole in a reinforced concrete structure, a holding tool including a holding ring member and a flexible mounting wire member extending outwardly from the holding ring member in at least three directions at substantially equal angles is used. A method of constructing a reinforced concrete structure to be constructed by constructing a retaining ring member at the sleeve pipe arrangement position in the assembled reinforcing bar, erection by fixing each radial mounting wire member to the nearest reinforcing bar, After that, the sleeve pipe is inserted through the retaining ring member to form the concrete pouring space by the formwork, and after the concrete is hardened after setting, the formwork and the sleeve pipe are removed, and holes are formed in the sleeve pipe extraction marks. In addition, it is characterized in that the holder is embedded.

[0009]

The holder has a holding ring member having a diameter capable of holding the sleeve tube substantially concentrically, and extends outward from the holding ring member in at least three directions at substantially equal angles so that the holding member can be fixed to the reinforcing bar. Since it is made of a flexible mounting wire member, a retaining ring member can be installed at the sleeve pipe disposition position in the reinforcing bar, and each radial mounting wire member can be fixedly attached to the nearest reinforcing bar portion. Since it does not move in the radial direction intersecting the axial direction in the installed state, it can be held so that the axial line of the sleeve pipe does not shift or shake due to the concrete pressure at the time of placing. Since the retaining ring member is erected, it can move in the axial direction on the axis through the flexible attaching wire member with respect to the reinforcing bar.
It is possible to respond to the entrance and exit of the sleeve tube with the tube fixed.

Further, since the holding ring member is provided with guide members extending along the axial direction in at least three directions of the holding ring member at substantially equal intervals, when the holding ring member holds the sleeve tube, the guide member has a sleeve. The tube can be axially guided and supported.

Then, in the hole construction method, the holding ring member,
A method for constructing a reinforced concrete structure, which is constructed by using a retainer made of a flexible attachment wire member extending outwardly from the retaining ring member in at least three directions at substantially equal angles, wherein a sleeve in a rebar is assembled. A retaining ring member is installed at the pipe installation position by fixing each radial mounting wire member to the nearest reinforcing bar, and after that, a sleeve pipe is inserted into the retaining ring member and concrete-cast by a formwork. Forming the installation space, removing the formwork and sleeve tube after the concrete has hardened after casting, forming a hole in the extraction mark of the sleeve tube, and embedding the holding tool,
When forming a concrete pouring space, the sleeve pipe can move in and out in the axial direction to establish a predetermined pouring space,
Since the sleeve tube is not displaced or shaken at the time of driving, a hole having a predetermined positional relationship can be formed in the extraction mark of the sleeve tube.

[0012]

FIG. 1 shows a holder according to a first embodiment of the present invention (see FIG. 2).
The holding tool 1 has a holding ring member 2 having a diameter capable of holding the sleeve pipe 5 in a substantially concentric manner, and the holding ring member 2 from the holding ring member 2. The flexible mounting wire member 3 extends outward in all directions at equal angles and is entangled with the reinforcing bar 9 so as to be fastened. The holding ring member 2 is formed by rolling a metal round bar and joining both ends by welding, and the attaching wire member 3 extending from the holding ring member 2 is fixed by welding along a part of the wire member. The joint strength is increased.

The holder 1 is provided on both sides of the sleeve pipe 5 of the reinforcing bar 9 in the thick concrete frame 8,
The radial mounting wire members 3 are embedded in a state in which they are entwined and fastened to the nearest upper, lower, left, and right portions of the reinforcing bar 9, respectively.
A hole 10 is formed in the extraction trace of.

As a result, it is possible to obtain a thick concrete skeleton 8 having the holes 10 in a predetermined positional relationship.

FIG. 3 illustrates a second embodiment of the holder of the present invention, and since the structure is basically the same as that of the above-described first embodiment, a description of the common structure will be given. Omitted,
The different configuration will be described.

The attachment wire member 3 of the holder 1 extends from the holding ring member 2 in three directions at equal angles.

FIG. 4 illustrates a third embodiment of the holder of the present invention. Since the structure is basically the same as that of the first embodiment described above, the description of the common structure will be given. Omitted,
The different configuration will be described.

The attachment wire member 3 of the holder 1 is welded at its end to the holding ring member 2 to be point-joined.

FIG. 5 illustrates the periphery of a hole in a reinforced concrete building constructed using the holder of the fourth embodiment of the present invention (see A in FIG. 6). Since the structure of this holder 1 is basically the same as that of the first embodiment described above, a description of the common structure will be omitted and a different structure will be described. The member 2 is provided with guide members 4 parallel to the axis line at equal intervals on four sides on one side. The guide member 4 is welded and fixed to the holding ring member 2 by welding the end of the metal round bar.

The holder 1 is in a state in which the radial mounting wire members 3 are entwined and fastened to the positions where the sleeve pipes 5 of the reinforcing bars 9 are arranged in the thin concrete skeleton 8 while being entwined with the nearest upper, lower, left and right portions of the reinforcing bars 9. A hole 10 is formed in the retaining ring member 2 at a cutout of a sleeve tube 5 which is axially guided and regulated by a guide member 4 in the holding ring member 2.

As a result, one holder 1 is provided for each hole 10.
Thus, it is possible to obtain a thin concrete skeleton body 8 in which the holes 10 have a predetermined positional relationship.

FIG. 6B shows a fifth embodiment of the holder of the present invention, and since the constitution is basically the same as that of the above-mentioned fourth embodiment, it has a common constitution. Description will be omitted, and different configurations will be described.

The guide members 4 are alternately arranged on both sides.

FIG. 6C shows a sixth embodiment of the holder of the present invention, and since the structure is basically the same as that of the above-mentioned fourth embodiment, it has a common structure. Description will be omitted, and different configurations will be described.

The guide members 4 are arranged on both sides, respectively.

FIG. 7 illustrates another example of the installation of the holder 1 of the present invention to the reinforcing bar 9, in which the attachment wire members 3 are entwined and fastened to the left and right parts of the reinforcing bar 9.

FIG. 8 illustrates, in the order of steps, a method of constructing a hole in a reinforced concrete building of the present invention constructed using the holder 1 of the first embodiment. First step (A in FIG. 8) The holders 1 are respectively provided on both sides of the sleeve pipe 5 provided in the assembled rebar 9, and the radial mounting wire members 3 are provided so that the holding ring members 2 are aligned with the axis. It is erected by being fastened to the upper, lower, left and right parts of the reinforcing bar 9 respectively. Second step (B in FIG. 8) The sleeve tube 5 is inserted through both the retaining ring members 2 to form the mold 6
The concrete placing space 7 is formed by. Third step (C in FIG. 8) Concrete is poured into the concrete placing space 7 and placed. Fourth step (D in FIG. 8) The mold 6 is removed after the concrete is hardened. Fifth Step (E in FIG. 8) The sleeve pipe 5 is extracted, and a concrete skeleton 8 in which holes 10 are formed in a predetermined positional relationship in the extraction trace is cast and formed.

As a result, when the concrete placing space 7 is formed, the sleeve pipe 5 is held and guided by the holders 1 at both ends thereof and moves in and out in the axial direction, so that the predetermined placing space 7 can be established. At the same time, since the sleeve pipe 5 does not shift or shake during the driving, the hole 10 having a predetermined positional relationship can be formed in the trace of the sleeve pipe 5.

[0029]

【The invention's effect】

A. According to claim 1, a holding ring member having a diameter capable of holding the sleeve tube substantially concentrically, and a flexibility that extends outward from the holding ring member in at least three directions at substantially equal angles and can be fixed to the reinforcing bar. Since it is composed of the attachment wire member, the retaining ring member can be installed at the position where the sleeve pipe is arranged on the reinforcing bar, and each radial mounting wire member can be fixedly attached to the nearest reinforcing bar portion. In this state, since there is no radial movement that intersects the axial direction, it is possible to keep the axial line of the sleeve pipe from shifting due to the concrete pressure at the time of placing. Then, the retaining ring member is in the erected state, through the attachment wire member to the reinforcing bar,
Since it is movable on the axis in the axial direction, it is possible to respond to the entrance and exit of the tube with the sleeve tube fixed.

B. According to claim 2, since the holding ring member is provided with guide members extending along the axial direction in at least three directions of the holding ring member at substantially equal intervals, when the holding ring member holds the sleeve tube, The sleeve tube can be guided and supported in the axial direction. In addition, since the guide member can guide and support the sleeve pipe in the axial direction, when the concrete pouring space is thin, by disposing the holder in the center of the pouring space, the sleeve pipe can be held by one holder. Can be held so that the axis is not displaced or shaken.

C. According to claim 3, a retaining ring member is installed at a sleeve pipe arrangement position in the assembled reinforcing bar by fixing each radial mounting wire member to the nearest reinforcing bar, and thereafter, the retaining ring member is sleeved. Insert the tube,
Since the concrete pouring space is formed by the formwork, and after the concrete is hardened after the pouring, the formwork and the sleeve pipe are removed, and the retainer is embedded, so that the sleeve pipe is formed when the concrete pouring space is formed. Can move in and out in the axial direction to establish a predetermined casting space, and since the sleeve pipe does not shift or shake during the driving, holes having a predetermined positional relationship can be formed in the sleeve pipe withdrawal mark.

[Brief description of drawings]

FIG. 1 is a partial cutaway view showing a periphery of a hole in a thick reinforced concrete building constructed by using the holder according to the first embodiment of the present invention.

FIG. 2 is an enlarged front view illustrating the first embodiment of the holder of the present invention.

FIG. 3 is an enlarged front view illustrating the second embodiment of the holder of the present invention.

FIG. 4 is a partially enlarged front view illustrating a third embodiment of the holder of the present invention.

FIG. 5 is a partially cutaway perspective view illustrating the periphery of a hole in a thin reinforced concrete building constructed using the holder according to the first embodiment of the present invention.

FIG. 6A is a fourth embodiment of the holder of the present invention,
(B) is each longitudinal cross-sectional view which respectively illustrates the fifth embodiment of the holder of the present invention and (C) the sixth embodiment of the holder of the present invention.

FIG. 7 is a front view illustrating another example of the installation of the holder of the present invention with respect to the reinforcing bar.

FIG. 8 illustrates a method for constructing a hole in a reinforced concrete building according to the present invention in the order of steps, in which (A) shows the first step,
(B) The 2nd process, (C) The 3rd process, (D) The 4th process, (E) The 5th process of each longitudinal section.

FIG. 9 is a front view showing a conventional construction example.

FIG. 10 is a vertical sectional view of the same.

[Explanation of symbols]

1,52 Retainer 2 Retainer retaining ring member 3 Retainer mounting wire member 4 Retainer guide member 5,54 Sleeve tube 6,55 Formwork 7,56 Concrete placing space 8 Concrete skeleton 9,50 Reinforcing bar 10 Hole 51 Support rod 53 Iron wire

Claims (3)

[Claims] 1. A holding ring member having a diameter capable of holding a sleeve tube in a substantially concentric manner, and a flexibility which extends outward from the holding ring member in at least three directions at substantially equal angles and can be fixed to a reinforcing bar. A holder for a sleeve pipe for constructing a hole in a reinforced concrete structure, comprising a mounting wire member. 2. The hole construction in a reinforced concrete building according to claim 1, wherein the retaining ring member is provided with guide members along the axial direction on at least three sides of the retaining ring member at substantially equal intervals. Sleeve tube holder. 3. A method for constructing a reinforced concrete structure, which is constructed by using a holding ring member and a holding tool made of a flexible mounting wire member extending outward from the holding ring member in at least three directions at substantially equal angles. A retaining ring member is installed at the sleeve pipe disposition position in the assembled reinforcing bar by fixing each radial mounting wire member to the nearest reinforcing bar portion, and after that, the sleeve is attached to the retaining ring member. Insert the pipe, form a concrete pouring space with the formwork, remove the formwork and the sleeve pipe after setting the concrete after placing, form a hole in the extraction mark of the sleeve pipe, and embed the retainer A method for constructing a hole in a reinforced concrete building, characterized in that