JPH09242016A - Bar arranging method for horizontal reinforcement of bridge pier - Google Patents

Abstract

PROBLEM TO BE SOLVED: To execute assembling of horizontal reinforcement in a short time surely and easily. SOLUTION: A traveling carriage 2 is arranged capably of being turned around a bridge pier, for example, an existing bridge pier 1, and a drum 4 wound by a spiral reinforcement 12 as a wire rod to be wound on the bridge pier 1 and an elevatable working scaffold 6 are provided on a rotary table 3 provided on the carriage 2. Meanwhile, a spacer metal fitting 7 for fixing the spiral reinforcement 12 is arranged on the proper position around the existing bridge pier 1, and while elevatably moving the working scaffold 6 at the same time as rotating the traveling carriage 2 around the existing bridge pier 1, the spiral reinforcement 6 is delivered from the drum 4, and the spiral reinforcement 12 is wound around the existing bridge pier 1 while fixing it to the spacer metal fitting 7.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of arranging lateral reinforcing bars of a pier.

[0002]

2. Description of the Related Art When a new bridge pier is constructed or an existing reinforced concrete bridge pier with a circular cross section is reinforced by seismic retrofitting with RC (reinforced concrete) winding method, vertical column reinforcements and lateral directions are provided around the pier. It is necessary to arrange the reinforcing bars and.

As the transverse reinforcing bars, strip reinforcing bars or spiral reinforcing bars are used.

[0004]

However, the construction strip reinforcement or spiral reinforcement or the post-construction seismic reinforcement strip reinforcement or spiral reinforcement is one round or at most several rounds of column reinforcement. It was attached to and fixed with a cable tie.

As a result, it takes labor and time to arrange the bar, and the efficiency is poor in terms of construction and technology unless the reinforcing bar is firmly anchored in order to exert its sufficient effect. In particular, when the piers of bridges in the city are reinforced against earthquakes, the piers are often on general roads, and it is desirable to reduce the traffic restriction time for construction as much as possible.

An object of the present invention is to solve the above-mentioned disadvantages of the prior art and to provide a method for arranging lateral rebars of a pier that can assemble lateral rebars reliably and easily in a short time.

[0007]

In order to achieve the above-mentioned object, the present invention has a traveling bogie arranged around a bridge pier so as to be freely turnable,
A drum around which wire rods are wound around a pier and a vertically movable work scaffold are installed on a turntable installed on the trolley, while the wire rods are fixed at appropriate positions around the pier. Spacer hardware is installed, while the traveling carriage is rotated around the existing bridge pier, and at the same time the work platform is raised and lowered, the wire rod that is wound up from the drum is fed out, and the wire rod is fixed to the spacer hardware and wound around the pier. , And a spacer hook is provided with a hook for binding wire rods to be wound up and down at appropriate intervals in the vertical direction, and the wire rod is locked to this hook to be fixed to the spacer metal rod.

According to the first aspect of the present invention, the wire rod wound around the drum is pulled out while the traveling carriage is moved along the peripheral surface of the pier to be constructed or the existing pier, and the wire rod is pulled out from the work scaffolding to be the spacer metal object. A single wire is continuously wound around the circumference of the pier simply by fixing it to the pier, and the reinforcement can be arranged easily and reliably in a short time.

According to the second aspect of the present invention, in addition to the above action, the fixing of the wire rod to be wound around the spacer metal is
Since it is only necessary to engage with a hook that is previously attached to the spacer metal and crush the hook, it is possible to easily bind the hook.

[0010]

Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a perspective view showing an embodiment of a method for arranging lateral reinforcing bars of a pier of the present invention. In the figure, reference numeral 1 is an existing pier, and a case of reinforcing the existing pier 1 will be described below as an example.

According to the method of the present invention, the traveling carriage 2 is arranged around the existing bridge pier 1 which is the target of seismic reinforcement so as to be rotatable. The traveling carriage 2 may be of a tire type or a rail type other than the crawler type as shown in the figure. In the case of the rail type, a rail is laid on the ground along the peripheral surface of the existing pier 1.

A turntable 3 is arranged on the traveling carriage 2, and a spiral bar made of, for example, PC steel wire, PC strand, or high-strength small-diameter rebar, which is a wire rod wound around the existing pier 1 on the turntable 3. Drum 4 wound 12
Is provided, and a fence 5 for stopping the removal of the spiral muscle 12 such as a PC steel wire is installed around the drum 4.

A work scaffold 6 is installed on the traveling carriage 2 so as to be positioned at the center of the drum 4. The work scaffold 6 is vertically telescopic or vertically movable, such as a telescoping type equipped with a twin tower lift, a single tower lift, an X lift, and the like, and has a driver's cab 6a at the upper part thereof. A traveling device for the traveling carriage 2, a rotating device for the drum 4, an elevating device for the work scaffold 6, and the like were installed.

On the other hand, spacer metal members 7 for fixing the spiral streaks 12 are arranged on the traveling carriage 2 at appropriate positions (two facing positions in the illustrated example) around the existing pier 1. As shown in FIG. 2, the spacer metal 7 has a long strip shape, and as shown in FIG. 2, a large number of holes 9 for locking the hooks 8 for binding the spiral streaks 12 are formed at appropriate intervals in the vertical direction.

Next, a method of winding the spiral muscle 12 around the existing pier 1 will be described. The work scaffold 6 is lowered and the steel wire clip 10 is attached to the end of the spiral bar 12. As shown in FIG. 5, this steel wire clip 10 is provided with a tubular locking portion 10a and a hook-shaped locking portion 10b, and a wedge 11 for holding a spiral streak 12 in each locking portion 10a, 10b. First, the end of the spiral streak 12 is attached to the wedge 11 in the hook-shaped engaging portion 10b.

An operator holds the spiral streak 12 having the steel wire clip 10 attached to the end thereof on the work scaffold 6 to raise the work scaffold 6, and at the same time, the rotary table 3 is rotated to pull out the spiral streak 12 from the drum 4. . In this case, the spiral streak 12 is extended from the side of the drum 4 facing the existing pier 1.

The steel wire clip 10 is fixed to the upper portion of the peripheral surface of the existing pier 1, and the spiral carriage 12 is passed through the hook-shaped locking portion 10b while holding the tip end of the traveling carriage 2 to the peripheral surface of the existing pier 1. 1 round, and as shown in FIGS. 3 and 4, the tip end is inserted into the cylindrical locking portion 10a to fix the spiral muscle 12 of the first round to the steel wire clip 10.

The spiral stirrup 12 of the first round is inserted into the steel wire clip 10 in advance on the ground around the existing pier 1 in the state as shown in FIG. 3, and the working scaffold 6 is raised in this state. The spiral reinforcement 12 may be lifted along the peripheral surface of the existing pier 1 and the steel wire clip 10 may be fixed to the existing pier 1 above.

Next, the traveling carriage 2 is slowly self-propelled along the periphery of the regular pier 1, and at the same time, the rotary table 3 is rotated to extend the spiral streak 12 from the drum 4 so that the spiral streak 12 surrounds the existing pier 1. Is rolled up on the outside of the spacer metal 7.

At this time, the hook 8 is hooked in the hole 9 formed in the spacer metal 7, and at the position of the spacer metal 7, the spiral streak 12 is locked to the hook 8. The binding of the spiral muscle 12 to the hook hook 8 is fixed by crushing the hook hook 8. The hook hook 8 may be attached to the spacer metal piece 7 each time the spiral muscle 12 is fixed, but may be attached to all the holes 9 in advance at the start of the work.

As described above, the traveling carriage 2 is run along the circumference of the existing pier 1, and at the same time, the working scaffold 6 is gradually lowered, and the spiral streak 12 is wound around the existing pier 1 from above the working scaffold 6. Stand up and fix to the hook 8 of the spacer metal piece 7 in order. When the winding work is completed and the work scaffold 6 is finished descending, the worker descends from the work scaffold 6 and removes the traveling carriage from around the existing pier 1.

Although the above-mentioned embodiment is for the case of reinforcing the existing pier 1, the reinforcement method of the present invention is not limited to this, and in the case of reinforcement of the lateral reinforcement of the newly constructed pier. Can also be implemented.

[0023]

As described above, according to the method of arranging the lateral reinforcing bars of the pier of the present invention, the spiral reinforcing bars as lateral reinforcing bars can be assembled by one continuous bar, and the traveling carriage can be installed around the pier. Since it is sufficient to run along the track and simultaneously raise and lower the working scaffold, the spiral streak is reeled out from the drum and wound up, so that it can be performed reliably and easily in a short time.

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment of a method for arranging lateral reinforcing bars of a pier according to the present invention.

FIG. 2 is a perspective view showing a main part of an embodiment of a method for arranging lateral reinforcing bars of a pier of the present invention in a state in which a spiral bar is fixed to a spacer metal member.

FIG. 3 is a perspective view showing a main part of an embodiment of a method of arranging lateral reinforcing bars of a pier according to the present invention in a state where spiral bars are fixed to a steel wire clip.

FIG. 4 is a partially cutaway rear view showing a main part of an embodiment of a method for arranging lateral reinforcing bars of a pier of the present invention, in which a spiral bar is fixed to a steel wire clip.

FIG. 5 is a vertical cross-sectional side view showing a state in which a spiral reinforcement is fixed to a steel wire clip, which shows a main part of an embodiment of a method for arranging lateral reinforcing bars of a pier of the present invention.

[Explanation of symbols]

 1 ... Existing bridge pier 2 ... Traveling trolley 3 ... Rotary table 4 ... Drum 5 ... Failure to prevent removal 6 Work scaffold 6a ... Operating cab 7 ... Spacer hardware 8 ... Hook hook 9 ... Hole 10 ... Steel wire clip 10a ... Cylinder -Shaped locking part 10b ... Hook-shaped locking part 11 ... Wedge 12 ... Spiral streak

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Reiko Amano 2-19-1 Tobita, Chofu-shi, Tokyo Kashima Construction Co., Ltd.

Claims (2)

[Claims] 1. A traveling carriage is rotatably arranged around a bridge pier, and a drum around which wire rods are wound around the bridge pier and a work scaffold movable up and down are installed on a rotary table installed on the carriage. On the other hand, a spacer metal member for fixing the wire rod to be wound around the pier at an appropriate position is arranged, and the wire rod to be wound around the drum is fed while rotating the traveling carriage around the pier and raising and lowering the work scaffold at the same time. A method for arranging lateral reinforcing bars of a pier, characterized by winding the wire rod around a pier while fixing the wire rod to a metal spacer. 2. A spacer pier according to claim 1, wherein the spacer hardware is provided with hook hooks for binding wire rods to be wound up and down at appropriate intervals, and the wire rods are fixed to the spacer hardware by being locked to the hooks. Method of arranging lateral reinforcing bars.