JPH1136288A - Fixing method for hoop bar - Google Patents

Abstract

PROBLEM TO BE SOLVED: To construct a cast-in place pile of good quality efficiently in a simple constitution by laying a rail like a circular ring concentrically with a cast-in place pile on the peripheral ground where to drive a cast-in place pile, and traveling a fixing device loaded with a hoop bar in the periphery of a cast-in place pile reinforcing bar cage to spirally fix the hoop bar. SOLUTION: A rail 1 is laid like a circular ring concentrically with a drilled hole surface 5 drilled for driving a cast-in place pile at a designated distance. A reinforcing bar cage 4 is suspended on the drilled hole surface 5, the tip of the hoop bar 2 is fixed to the lower end part of the main reinforcement 41 of the reinforcing bar cage 4, and a fixing device 3 loaded with the hoop bar 2 is traveled along the rail 1 while the speed is regulated. As the fixing device 3 is rotated on the rail 1, the hoop bar 2 is sequentially fixed to the outer periphery of the main reinforcement 41 to erect the reinforcing bar cage 4 in the drilled hole surface 5 according to the fixing speed of the hoop bar 2. The reinforcing bar cage 4 can fix the hoop bar 2 to the main reinforcement 41 without deformation due to rigidity of the main reinforcement 41 and a holder 42 fitted at designated vertical intervals to the main reinforcement 41.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for fixing a hoop bar to a reinforcing bar cage for driving a cast-in-place pile.

[0002]

2. Description of the Related Art On the ground, a pre-assembled steel cage is suspended at a place where a cast-in-place pile is to be cast, and hoop bars are fixed to the steel cage one by one at that location, or
A method has been performed in which a hoop is fixed in advance to a reinforcing steel basket assembled on the ground, and then suspended at a place where a cast-in-place pile is to be driven. However, these conventional methods have the following problems. Depending on the construction site, there is not enough space to assemble the reinforced cage in advance. Since the rebar basket is hung by a crane or the like and the hoop bars are fixed one by one, the operation rate of heavy machinery is reduced and workability is also reduced. The assembly of the rebar basket and the fixing work of the hoop bars are all performed manually, and the efficiency is reduced. Since the fixing operation of the hoop streaks is manual, it is difficult to obtain a constant hoop tension. It cannot be expected as a high-quality cast-in-place pile.

[0003]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned conventional problems, and is intended to provide a workable, high-quality cast-in-place pile with a simple method. It is intended to provide a fixing method.

[0004]

SUMMARY OF THE INVENTION The present invention relates to a method for fixing a hoop bar of a steel cage used for a cast-in-place pile, which is concentric with the cast-in-place pile on the ground around which the cast-in-place pile is cast. The fixing device loaded with hoops is installed on the rail, and the fixing device travels around the cast-in-place pile reinforced cage so that A hoop streak fixing method characterized by fixing the hoop streaks spirally on the outer peripheral surface, and also by keeping the running speed of the fixing device constant and adjusting the descent speed of the cast-in-place pile reinforcing bar. A method of fixing a hoop streak, which is characterized by adjusting a fixing pitch of a hoop streak.Furthermore, by making a descent speed of a cast-in-place pile reinforcing bar constant and adjusting a traveling speed of a fixing device. And adjust the hoop stabilization pitch Characterized in that a fixing method of the hoop.

[0005]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.

<A> Overall Configuration FIG. 1 is a side view showing the construction of the hoop streak fixing method according to the present invention. On the surrounding ground where the cast-in-place pile is placed,
Rail 1 laid in a ring so that it is concentric with the cast-in-place pile
And the fixing device 3 mounted on the rail 1 and loaded with the hoop 2 runs on the outer periphery of the steel cage 4 of the cast-in-place pile.

<B> Rail FIG. 2 is a plan view of FIG. The rail 1 is laid in a ring shape at a predetermined distance so as to be concentric with the drilled surface 5 drilled for placing the cast-in-place pile.

<C> Reinforcing cage 3 FIG. 3 is a perspective view showing a normally used reinforcing cage 4.
The reinforcing bar 4 includes a main bar 41 arranged at a predetermined pitch, and a main bar 41.
The holders 42 are attached at predetermined intervals in the vertical direction, and are processed at the site or produced at the factory and transported to the site. In the embodiment of the present invention, a case where the cast-in-place pile and the reinforcing bar are cylindrical is described. However, the same operation and effect can be obtained in the case of a polygonal pillar such as a square pillar.

<D> Holding Tool FIG. 4 is a plan view showing an example of a holding tool 42 for holding the main reinforcement 41 constituting the reinforcing bar cage 4. The holder 42 is a steel band 43
Are formed in an annular shape, and a concave portion 44 for holding the main bar 41 is provided on the circumference. Alternatively, the reinforcing bar may be simply processed into an annular shape, and the main bar 41 may be bound to the reinforcing bar to form the holder 42.

<E> Fixing Device FIG. 5 is a front view showing an example of the fixing device 3. The fixing device 3 includes a vertical wheel 31 that holds the rail 1 and a rail 1.
A horizontal wheel 32 running on the upper side, a column 34 supporting a drum 33 for winding the hoop line 2, and a guide column 35 for feeding the hoop line 2 wound on the drum 33 to the rebar cage 4 at a fixed angle. It is configured. The fixing device 3 can automatically run on the rail 1 by a power not shown.
The present fixing device 3 is an embodiment of a device used for a hoop streak fixing method, and may be another device that travels around the reinforcing bar cage 4 and sends out the hoop bar 2 to the reinforcing bar cage 4.

[0011]

The operation of the hoop streak fixing method will be described below.

<A> Suspension of Reinforced Basket The reinforced cage 4 is suspended on the drilled surface 5 by a crane (not shown).

<B> Installation of Reinforcing Bar In the above-mentioned state, the tip of the hoop bar 2 is fixed to the lower end of the main bar 41 of the reinforcing bar 4, and power (not shown) is started to fix the fixing device 3 to the rail 1. Run along the top. As the fixing device 3 rotates in a circle on the rail 1, the hoop muscles 2 are sequentially fixed to the outer periphery of the main muscle 41. The reinforcing bar cage 4 is built along the drilled surface 5 in accordance with the fixing speed of the hoop bar 2.

<C> Hoop streak fixing The hoop streak 2 is successively fixed to the outer periphery of the main streak 41 by continuing the above-mentioned operation and moving the fixing device 3 along the rail 1. The reinforcing bar 4 has the rigidity of the main bar 41 and the holders 42 attached at predetermined intervals in the vertical direction of the main bar 41, so that the hoop bar 2 can be fixed to the main bar 41 without deformation. Hoop muscle 2
Must be fixed to the main bar 41 in accordance with the pitch determined by the design. As a method for this, in the present invention, the running speed of the fixing device 3 is kept constant,
The fixing pitch of the hoop muscle 2 is adjusted by adjusting the descending speed of the hoop. The fixing device 3
, The fixing pitch of the hoop streaks 2 is adjusted. And any other method may be employed.

[0015]

Since the present invention has been described above,
The following effects can be obtained. <A> The fixing device fixes the hoop streak by concentrically rotating the outer periphery of the rebar cage circularly, so that the working efficiency is high. <B> Since the rebar cage is lowered in accordance with the constant traveling speed of the fixing device, the spiral hoop streak is fixed at a predetermined pitch, and the cast-in-place pile having good toughness can be constructed. <C> Since the fixing device is run in accordance with the constant descending speed of the reinforcing rod cage, a continuous spiral hoop streak fixed at a predetermined pitch is formed, and the cast-in-place pile having good toughness can be constructed. <D> Since the fixing pitch of the hoop muscle can be adjusted freely,
Versatile construction corresponding to the design can be easily performed.

[Brief description of the drawings]

FIG. 1 is a side view showing a construction state of a hoop streak fixing method according to the present invention.

FIG. 2 is a plan view of the same.

FIG. 3 is a perspective view of a reinforcing bar cage.

FIG. 4 is a plan view showing an example of a holder for holding main bars of a reinforcing bar cage.

FIG. 5 is a front view illustrating an example of a fixing device.

Continued on the front page (72) Inventor Kenji Amano 1-25-1, Nishishinjuku, Shinjuku-ku, Tokyo Taisei Construction Co., Ltd. (72) Inventor Yoshihiro Tanaka 1-25-1, Nishishinjuku, Shinjuku-ku, Tokyo Taisei Construction Co. In company

Claims (3)

[Claims] Claims: 1. A method for fixing a hoop bar of a reinforcing cage used for a cast-in-place pile, wherein a rail is annularly formed on the ground around the cast-in-place pile so as to be concentric with the cast-in-place pile. The hoop is spirally mounted on the outer peripheral surface of the cast-in-place pile reinforced cage by the fixation device installed on the rail and laid on the rail. A method for fixing hoop streaks, characterized by fixing in a shape. 2. A fixing method of a hoop streak according to claim 1, wherein the fixing speed of the hoop streak is adjusted by keeping the running speed of the fixing device constant and adjusting the descending speed of the cast-in-place pile reinforcing bar. A method of fixing hoop streaks, characterized by going. 3. The method of fixing a hoop streak according to claim 1, wherein the descent speed of the cast-in-place pile reinforcing bar is fixed and the running speed of the fixing device is adjusted to adjust the hoop streak fixing pitch. A method of fixing hoop streaks, characterized by going.