JP4005899B2 - Rapid construction method and jig in steel plate winding reinforcement work of multi-layered ramen viaduct - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a rapid construction method and jig for reinforcing work for increasing the earthquake resistance of a bridge pier such as a multi-layer ramen viaduct for roads and railways.
[0002]
[Prior art]
Originally, in order to increase the earthquake resistance of reinforced concrete bridge piers such as multi-layer ramen viaducts for roads and railways, as shown in FIG. 7, when the cross section of the pier is rectangular, Two L-shaped or U-shaped reinforcing steel plates are wound (enclosed), and both reinforcing steel plates are welded, and then mortar is injected between the reinforcing steel plates and the pier outer periphery to reinforce the work. Yes.
[0003]
When carrying out this work, a heavy-weight reinforced steel plate transported by a large vehicle is lifted vertically from its loading platform by a lifting device such as a crane, and an operator who has boarded the riding section of an aerial work vehicle After the position is adjusted by work and temporarily fixed to the outer peripheral surface of one side of the pier, another reinforcing steel plate is temporarily fixed again to the outer peripheral surface of the other side of the pier, and then an operator who has boarded the riding section of the aerial work vehicle temporarily After welding both the reinforced steel plates that were stopped, mortar was injected between the reinforced steel plate and the pier outer peripheral surface (see, for example, Patent Documents 1 to 4).
[0004]
[Patent Document 1]
Japanese Patent No. 3079124 (page 2-3, FIG. 1-4)
[Patent Document 2]
Japanese Patent No. 3032716 (page 4-5, FIG. 1)
[Patent Document 3]
Japanese Patent Laid-Open No. 9-302627 (page 2-3, FIG. 1-4)
[Patent Document 4]
Japanese Laid-Open Patent Publication No. 9-177036 (page 3-4, FIGS. 1, 6, and 7)
[0005]
In FIG. 7, P indicates a pier, S indicates a reinforcing steel plate, and M indicates mortar.
[0006]
[Problems to be solved by the invention]
The conventional pier reinforcement work requires a large lifting space for the purpose of lifting the reinforcing steel plate vertically by the lifting device, and it is impossible to lift the reinforcing steel plate when the height of the pier is low. It was necessary to work by dividing the steel sheet, which was a factor in process delay.
[0007]
In addition, since the operator manually adjusts the position of the reinforcing steel plate on the pier outer periphery, it requires a lot of labor and time for the work, and is very dangerous.
[0008]
In view of such drawbacks, the present invention provides a rapid construction method and a jig for multilayer steel frame viaduct steel sheet reinforcement work that can safely and efficiently perform the reinforcement work of the multilayer steel frame viaduct in a short period of time. It is for the purpose.
[0009]
[Means for Solving the Problems]
The present invention is arranged between adjacent piers in a work to increase the earthquake resistance of the pier by winding a reinforcing steel plate on an existing pier and injecting mortar between the steel plate and the outer peripheral surface of the pier. Tilt the pedestal to a height by tilting the pedestal on one side edge in the front-rear direction of the support frame to be installed on the supported beam. After installing each of these jigs on the beam members on both sides of the bridge pier to be reinforced via the lifting means, after fixing the steel plate on the cradle of each jig, The jig cradle stands upright and the steel plate fixed to the cradle is erected on both sides of the pier outer periphery, then both steel plates are welded, and mortar is injected between the steel plate and the pier outer peripheral surface. What
Alternatively, the cradle can be moved back and forth with respect to the support frame, and the position of the steel sheet wound around the pier can be adjusted.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
A jig for rapid construction (hereinafter simply referred to as a jig) in a steel sheet winding reinforcement work of a multilayer ramen viaduct according to the present invention is a reinforcing steel sheet (hereinafter simply referred to as a steel sheet) on a bridge pier P of a multilayer ramen viaduct such as an existing road or railway. In the construction for increasing the earthquake resistance of the pier P by winding S and injecting mortar M between the steel plate S and the outer peripheral surface of the pier P, the beam material disposed between the adjacent pier P It installs on B, winds up the steel plate S around the pier P, and consists of the following structures, as shown in FIGS.
[0011]
In this example, since the steel sheet S is wound around a concrete pier P having a rectangular cross section, a pair of U-shaped ones corresponding to the pier P are wound from both sides of the pier P.
[0012]
A moving frame 14 is arranged on a support frame 12 installed on a beam member B disposed between adjacent piers P so as to be movable in the front-rear and lateral directions.
[0013]
In this example, since the support frame 12 is fixed to the bottom surface of the beam material B via a fixture 16 such as a jack, the lower end is extended downward.
[0014]
In order to move the moving frame 14 back and forth and laterally, the moving frame 14 is slidably arranged in the support frame 12 in the forward and backward and lateral directions, and the moving cylinder 14 for moving back and forth and the expanding and contracting cylinder 20 for moving horizontally are provided. This is done by expanding and contracting.
[0015]
For this reason, position adjustment of the steel plate S wound up on the pier P can be performed very easily.
[0016]
At one side edge of the moving frame 14 in the front-rear direction (the right edge in the jig on the left side of FIG. 1 and the left side edge in the jig on the right side of FIG. 1) Arranged freely.
[0017]
In this example, raising and lowering of the cradle 22 is performed by pivotally supporting the cradle 22 on one side edge of the moving frame 14 and extending and retracting an expansion / contraction jack 24 that is a raising and lowering means.
[0018]
In the figure, 26 is a lever block for fixing the steel sheet S to the cradle 22, 28 is a fixed angle to be mounted between the lower ends of the support frame 12, 30 is a jack for fixing the fixed angle 28 to the beam B, etc. , 32 is a scaffold attached to the cradle 22, 34 is a scaffold attached between a pair of jigs installed on the beam material B on both sides of the pier P, C is a lifting means such as a crane, G is the ground, H represents an operator, and M represents mortar.
[0019]
The process of rapid construction in the steel sheet winding reinforcement work of the multilayer ramen viaduct using the jig according to the present invention will be described in detail below.
[0020]
The bridge pier P to be reinforced in this process is a bridge pier P having a rectangular cross section such as a multi-layer ramen viaduct for roads and railways, and the steel sheet S wound around the pier P has a U-shaped cross section that can be wound from both sides of the pier P. Is.
[0021]
First, a jig is installed on the ground G (see FIG. 3).
[0022]
Next, the jig pedestal 22 is tilted, lifted by lifting means C such as a crane, and installed on the beam member B arranged between adjacent piers P (see FIG. 4).
[0023]
The pedestal 22 is tilted in a state where the height is lowered, and when the jig is lifted by the lifting means C and installed on the beam material B, the ground G and another adjacent pier P, beam material B This is because the lifting means C can be moved close to the pier P without being affected by the height and distance, and workability can be improved.
[0024]
Next, the jig is fixed to the beam member B.
[0025]
At this time, since the center of gravity of the jig moves due to the weight of the steel sheet S and the tilting operation when the steel sheet S is fixed to the cradle 22, the jig is easily dropped from the beam material B, and this dropping is prevented. For the purpose, by attaching a fixed angle 28 between the lower ends of the support frame 12 by the fixture 16 at the lower end of the support frame 12 and fixing the fixed angle 28 to the bottom surface of the beam member B by the fixture 30, respectively. The jig is securely fixed to the beam member B.
[0026]
In fixing the jig to the beam member B, it is desirable to fix both side portions of the support frame 12 to the side surface of the beam member B.
[0027]
Next, the steel plate S is lifted and placed on the cradle 22 with the jig tilted via the lifting means C and fixed by the lever block 26 (see FIG. 5).
[0028]
Next, the cradle 22 is erected vertically, and the steel plate S fixed to the cradle 22 is erected on the outer periphery of one side of the pier P (see FIG. 6).
[0029]
At this time, the stand 22 is raised by extending the telescopic jack 24 which is a raising / lowering means.
[0030]
Next, the moving frame 14 is moved back and forth with respect to the support frame 12 via the forward / backward movement expansion / contraction cylinder 18 and the movement frame 14 is moved laterally with respect to the support frame 12 via the lateral movement expansion / contraction cylinder 20. Thereby, the position adjustment to the pier P of the standing steel plate S is performed as needed.
[0031]
For this reason, compared with the position adjustment to the pier P of the steel plate S by an operator's manual work, position adjustment work can be performed extremely safely and easily.
[0032]
Next, in order to erect the steel plate S on the other one side outer periphery of the pier P, the pedestal 22 of another jig is tilted and lifted and installed on the beam material B via the lifting means C. The steel plate S is fixed on the base 22, and the steel plate S is erected on the outer periphery of the pier P.
[0033]
The steel sheet S is wound on both sides of the pier P by the above process.
[0034]
The wound steel plates S are preferably fastened and fixed with a fastening tool such as a lever block.
[0035]
Next, the steel plates S wound on both sides of the pier P are welded.
[0036]
At this time, a scaffold 34 is disposed between the pair of jigs, and an operator performs a welding operation using the scaffold 34.
[0037]
Next, mortar M is filled between the welded steel plates S and the outer peripheral surface of the pier P.
[0038]
Through the above steps, the rapid construction in the steel sheet winding reinforcement work to the pier P of the multi-layered ramen viaduct is completed.
[0039]
Thus, according to the rapid construction method in the steel sheet winding reinforcement work by the jig according to the present invention, a pair of jigs in which the cradle 22 is tilted are arranged between the bridge piers P by the lifting means C. After lifting and setting on the material B, the steel plate S is fixed on the pedestal 22 and raised to wind the steel plate S around the bridge pier P. Therefore, the jig is tilted and lowered in height. Can be lifted and installed, and the lifting means C can be brought close to the pier P without being influenced by the height and distance between the ground G and another adjacent pier P and beam B. It can be done safely, easily, smoothly, efficiently, and in a short period of time.
[0040]
Further, by moving the cradle 22 back and forth and laterally with respect to the support frame 12, the position of the upright steel sheet S to the pier P can be adjusted safely and easily, and the position of the steel sheet can be adjusted. Such work burden can be drastically reduced.
[0041]
Further, by arranging the scaffold 34 between a pair of jigs installed on both sides of the pier P, the work of welding the steel sheet S can be performed using this scaffold 34. This eliminates the need to use the and improves workability as well as drastically reduces the work cost.
[0042]
In this example, the back and forth and lateral movement of the cradle 22 with respect to the support frame 12 is due to the movable frame 14 that is arranged on the support frame 12 so as to freely move back and forth and laterally. 22 may be directly arranged on the support frame 12 so as to be movable in the front-rear direction and in the lateral direction.
[0043]
Further, by omitting the lateral movement mechanism before and after the cradle 22 and accurately installing jigs for winding up the steel sheet S on the beam members B on both sides of the bridge pier P to be reinforced, the safety and ease unique to the present invention is achieved. In addition, the effect of performing the steel sheet winding reinforcement work smoothly and efficiently is achieved.
[0044]
Further, the moving means of the moving frame 14 with respect to the support frame 12 and the raising / lowering means of the cradle 22 are the forward / backward moving expansion / contraction cylinder 18, the lateral movement expansion / contraction cylinder 20, and the expansion / contraction jack 24, but other mechanisms are adopted. Is free.
[0045]
In addition, it is obvious that the cradle 22 is used in exchange for the steel plate S wound around the pier P.
[0046]
In addition, by making the cradle 22 extendable in the length direction, the length of the cradle 22 can be expanded and contracted to fix various steel plates S in correspondence with the steel plate S wound around the pier P. It is obvious that it can be diverted to more sites.
[0047]
Moreover, although the cross-sectional shape of the pier P is rectangular, when it is circular, the steel plate S should just be made into a semicircle shape, and the cross-sectional shape of the pier P and the shape of the steel plate S are limited to this example. There is nothing.
[0048]
Further, the steel plate S is fixed to the cradle 22 in this construction method after the jig is installed on the beam member B. After the steel plate S is fixed to the cradle 22 in advance, the jig is attached to the beam member. It is obvious to install it on B.
[0049]
【The invention's effect】
According to the rapid construction method and jig in the steel plate reinforcement work of the multi-layered ramen viaduct according to the present invention, a pair of jigs are lifted on the beam material arranged between the piers by the lifting means with the cradle tilted. After installation, fix the steel plate to the cradle, raise the cradle and wind the steel plate on the pier, so that the jig can be lifted and installed with the cradle tilted and lowered in height, It is possible to work with the lifting means closer to the bridge pier, regardless of the height and distance from the ground and other adjacent piers and beam materials, making it safe, easy, smooth and efficient. In addition, the work can be performed in a short period of time.
[0050]
In addition, by moving the cradle in the longitudinal and lateral directions with respect to the support frame, it is possible to safely and easily adjust the position of the upright steel plate to the pier, and the work load for adjusting the position of the steel plate is reduced. It can be drastically reduced.
[Brief description of the drawings]
FIG. 1 is a front view showing a usage state of a rapid construction jig in a steel sheet winding reinforcement work of a multilayer ramen viaduct according to the present invention.
FIG. 2 is a side view of the same.
FIGS. 3A and 3B show a first work process, where FIG. 3A is a front view and FIG. 3B is a side view.
4A is a front view, FIG. 5B is a side view, FIG. 5B is a front view, and FIG. 4B is a side view.
6A is a front view, FIG. 7B is a side view, and FIG. 7B is a front view showing a reinforced pier. FIG. 6B is a cross-sectional view.
[Explanation of symbols]
P Bridge pier B Beam material S Reinforced steel plate M Mortar C Lifting means 12 Support frame 18 Stretching cylinder 20 for moving back and forth Stretching cylinder 22 for sideways movement 24 Receiving base 24 Stretching jack

Claims (4)

A reinforced steel plate (S) is wound around an existing multi-layer ramen viaduct pier (P), and mortar (M) is injected between the reinforced steel plate (S) and the pier (P) outer peripheral surface to create a pier (P ) In the construction to increase the earthquake resistance,
A pedestal (22) on which the steel plate (S) is erected on the outer periphery of the pier (P) on one side edge of the support frame (12) installed on the beam (B) arranged between adjacent piers (P) ) Is installed on the ground (G)
Tilt the cradle (22) of each construction jig so that the height is lowered, and suspend the pair of construction jigs on the beam (B) on both sides of the bridge pier (P) to be reinforced. After each installation via the upper means (C)
After fixing the reinforcing steel plate (S) on the cradle (22) of each construction jig,
After the stand (22) of each construction jig is erected vertically, the reinforcing steel plate (S) fixed to the cradle (22) is erected on both sides of the pier (P) outer periphery,
Rapid construction method in steel-wall reinforcement work for multi-layered ramen viaducts, characterized by welding both reinforcing steel sheets (S) and injecting mortar (M) between the reinforcing steel sheets (S) and the pier (P) outer peripheral surface . The pedestal (22) is movable back and forth with respect to the support frame (12), and the position of the reinforcing steel plate (S) wound around the pier (P) can be adjusted. Rapid construction method for steel plate winding reinforcement work for multi-layered ramen viaduct. A reinforced steel plate (S) is wound around an existing multi-layer ramen viaduct pier (P), and mortar (M) is injected between the reinforced steel plate (S) and the pier (P) outer peripheral surface, thereby providing a pier (P ) In the construction to increase the earthquake resistance,
A pedestal (22) that is pivotably supported on a side edge in the front-rear direction of a support frame (12) installed on a beam member (B) disposed between adjacent piers (P ) is arranged. Te becomes cradle (22) steel plate of a multilayer rigid frame viaduct reinforcing steel that is fixed (S) of the cradle (22) is characterized by the Turkey is erected on piers (P) the outer periphery by standing on Jig for rapid construction in winding reinforcement work. The pedestal (22) is movable back and forth with respect to the support frame (12), and the position of the reinforcing steel plate (S) wound around the pier (P) can be adjusted. Jig for rapid construction in steel plate winding reinforcement work of multi-layered ramen viaduct.

Images