JP2001105070A - Method of manufacturing cage - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cage manufacturing method which is efficient and simple in manufacturing the cage without any troublesome works, and excellent in working efficiency, labor cost and material cost. SOLUTION: This cage manufacturing method comprises a reinforcing panel placing process in which a reinforcing panel P is hoisted from an upper part to a panel receiving part RP provided at a place facing each other in each lower part of fixed and movable cage assembly bases 14 and 15, and a lower end of the reinforcing panel P is placed on the panel receiving part RP, a panel fixing process in which the reinforcing panel P placed on the panel receiving part RP in the reinforcing panel placing process is fixed along the cage assembly bases 14 and 15 by an attachable/detachable panel fixing unit TK, and a hoisting jig 16 for hoisting the reinforcing panel P is removed, a bar arranging process in which bars are arranged after adjusting the distance between the reinforcing panels fixed to the cage assembly bases 14 and 15 in the panel fixing process by moving the movable cage assembly base 15, and a carrying process in which a cage hoisting jig 17 is fitted to an upper end of a completed cage 10 through the processes, and the panel fixing piece TK fixing the reinforcing panel P and the cage assembly bases 14 and 15 in the panel fixing process, is removed, and carried to the other.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing a reinforced cage in which a reinforced cage is manufactured in advance when constructing a reinforced concrete structure.

[0002]

2. Description of the Related Art Modern construction, such as realization of efficient structure arrangement by effectively utilizing land in a multifaceted and three-dimensional manner, or construction of an underground structure that does not interfere with existing structures. At present, the environment surrounding the field is required to be more efficient and denser than before and the difficulty in construction is increasing. Under such circumstances, large-scale reinforced concrete structures constructed underground or semi-underground, such as various tanks or transportation such as road railways, are increasing demand, and are generally used when constructing such structures. The underground continuous wall method and the like can be cited as a construction method used in the field. This underground diaphragm wall method is excellent in structural strength, adaptability to large depths and environmental preservation, but due to the construction properties of the method, the reinforcing rod cage which becomes the core material of the continuous wall must be manufactured on the ground in advance. Need to be kept.

[0003] As a conventional method of manufacturing the reinforcing bar cage,
For example, hanging rods are attached at appropriate intervals to the surface of one of a pair of front and back reinforcing bars assembled according to the curved surface shape of the structure or the like to form the reinforcing rod cage through a shackle or the like. By suspending the suspension beam connected to each upper end using a crane or the like, the reinforcing bar panel is suspended along a fixed-type reinforcing bar assembly assembling base.
In such a conventional method, while continuing the hanging operation state, the other reinforcing bar panel is continuously hung on the movable rebar cage assembling base in the same manner as described above, and thereafter, the movable rebar cage assembling base is movable with respect to the fixed rebar cage assembling base. The rebar basket assembling base is moved close to a predetermined width of the rebar basket.

[0004]

However, in the conventional method for manufacturing a reinforcing bar cage, the above-mentioned hanging beam is attached to each of a plurality of reinforcing bar panels assembled in advance, and the reinforcing bar is actually mounted on the reinforcing bar assembly stand. Therefore, it was necessary to fix a pair of front and back reinforcing bars by connecting the respective suspension beams integrally by a connecting girder material and to start work. Generally, in a construction yard where only a limited area can be secured in general, all the reinforcement panels that occupy a large amount in the construction yard only by hand under the situation where various transport machines and reinforcing materials are complicated. If the work of attaching the suspension beam and the connecting girder, which cannot be performed, is to be performed, it is inevitable that the work efficiency is reduced due to the remarkable complexity of the work, and the labor cost and the equipment cost are increased.

Moreover, since such a hanging beam must be used consistently until the end of the production of the reinforcing bars, when the reinforcing bar is manufactured using a large number of reinforcing panels in a large-scale construction, the initial use of the hanging beams is required. The investment was too large, and furthermore, it was impossible to divert at every work process, so the work cycle time was greatly increased.

[0006] Further, when performing an operation of moving the movable rebar cage assembling base to a predetermined width of the rebar cage with respect to the above-mentioned fixed type rebar cage assembling base, a pair of front and back reinforcing bar panels are connected via a suspension beam. The fixed connecting girder material and the supporting beam material for supporting the connecting girder material often do not slide smoothly due to friction between the joint surfaces thereof, so that a predetermined positional relationship cannot be secured and maintained. Had to be finely adjusted. Therefore, frequent and complicated position correction work is frequently performed on the rebar panel which is easy to swing and is a heavy object, and the overall work efficiency is greatly reduced.

Accordingly, the present invention has been made in view of such a conventional problem, and it is possible to efficiently and easily manufacture a rebar basket without complicated work, thereby improving work efficiency and labor cost. Further, the present invention provides a method of manufacturing a reinforcing rod cage having good equipment costs and the like.

[0008]

DISCLOSURE OF THE INVENTION The present invention has been made to achieve the above-mentioned object, and comprises a fixed type reinforcing bar which suspends and fixes reinforcing bar panels which are assembled in a substantially planar shape so as to form a reinforcing bar cage. A method of manufacturing a reinforcing bar cage comprising a basket assembling gantry and a movable reinforcing bar assembling cradle that can be freely moved to and from the fixed reinforcing bar assembling gantry, wherein the fixed and movable reinforcing squirrel cages are provided. A rebar panel mounting step of suspending the rebar panel from above and mounting a lower end of the rebar panel to the panel receiver with respect to a panel receiving portion provided at a position facing each other in each lower portion of the assembly base. The reinforcing bars respectively mounted on the panel receiving portion in the reinforcing bar mounting step are fixed along the reinforcing bar cage assembling stand by a detachable panel fixing tool, and then a hanging jig for hanging the reinforcing bar panel is provided. Panel to remove A fixing step, and a reinforcing arrangement step of adjusting the distance between the reinforcing bars fixed to the two reinforcing cage assemblies to a predetermined distance by moving the movable reinforcing cage assembly base and performing various reinforcing arrangements by the panel fixing step, After attaching the reinforcing cage hanging jig to the upper end of the reinforcing cage that has been manufactured through the respective steps, the panel fixing tool that fixes the reinforcing panel and the reinforcing cage assembly stand in the panel fixing step is removed and transported to the other. And a transporting step.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below in detail with reference to the accompanying drawings. FIG. 1 is a flowchart showing an example of the method for manufacturing a reinforcing rod cage according to the present invention. In the present embodiment, for example, a liquefied gas tank having a circular cross section constructed underground or semi-underground is assumed, and a case is described in which the present invention is employed to construct the side wall of the structure. In order to carry out concrete casting work and the like in a small space as an underground excavation area, it is necessary to previously manufacture the reinforcing rod cage 10 as a reinforcing structure on the side wall on the ground.

Step 1 FIGS. 2 to 11 are explanatory views showing the actual procedure of the method of manufacturing a reinforcing rod cage according to the present invention. First, a reinforcing bar net P (as a reinforcing bar panel) mainly comprising the reinforcing bar cage 10 is manufactured in the reinforcing bar processing yard Y on the ground. There are two types of the reinforcing bar network P, an inner reinforcing bar network P1 and an outer reinforcing bar network P2 along the inner and outer surfaces of the side wall structure, respectively, and are manufactured by combining reinforcing bars of different diameters according to a predetermined reinforcing diagram. Prior to the work of arranging the inner and outer rebar networks P1 and P2, a suitable number of rebar network assembling bases 11 are installed in advance in the rebar processing yard Y, and the inner and outer rebar networks P1 and P2 for which rebar arrangement has been completed are temporarily placed. A temporary gantry 12 is set up for this purpose. After the preparation is completed, the rebar is carried into the yard Y, and the rebar having a predetermined shape is carried into the rebar network assembly base 11 via a bending machine or the like (not shown).

Step 2 Continuing from Step 1 described above, the circumferential stripe CR on the tank side wall is used.
A vertical streak VR (hereinafter referred to as a vertical streak) and a vertical streak VR (hereinafter referred to as a vertical streak) are placed on a ruler 11a (for example, H steel) on the reinforcing bar assembly base 11 using a crane or the like. After arranging the circumferential muscle CR at appropriate intervals, the vertical muscle V
R is arranged to complete the reinforcing bar network P.

The details of the procedure for assembling the reinforcing bar P are as follows. In the rebar processing yard Y, the rebar is bent in accordance with the processing table indicating the bending shape, the rebar length, and the like. Reinforcing bar bundle T finished with the above processing by crawler crane etc.
Is suspended and placed on the reinforcing bar assembly frame 11. The circumferential muscle CR is arranged according to the ruler 11a (see FIG. 2). Similarly, the vertical streak VR is placed on the gantry 11 by a crawler crane or the like, and is arranged according to the ruler 11a (see FIG. 3). The intersection of the circumferential muscle CR and the vertical muscle VR is bound at every other location by a number line. A suspension point reinforcing U bolt (not shown) serving as a fulcrum at the time of transport of the reinforcing bar P is fixed to the intersection of the uppermost circumferential bar and the vertical bar.
Also, binding at the intersections of the vertical streak VR and the circumferential streaks CR on both sides of the suspension point reinforcing U-bolt is performed at all locations along the reference line.

[Step 3] Next, the reinforced wire net P completed as described above is suspended by a crawler crane or the like using the horizontal moving hanging jig 13 and moved to the reinforced wire net temporary mounting base 12 (see FIG. 4). . At the time of the movement, the reinforcement net P is basically slung and lifted at the center of gravity of the reinforcement mesh so that deformation such as bending or twisting does not occur as much as possible during the movement. Further, the reinforcing nets P are laid one on another so that the temporary placement height is, for example, about 1.5 m (about 4 to 5 reinforcing steel nets) (see FIG. 5). The reinforcing jig 13 for lateral movement of the reinforcing bar mesh is not specially structured, and as shown in FIG.
b etc. are added.

[Step 4] (Reinforcing panel mounting step and panel fixing step) When the above-described production of the reinforcing bar net P is completed, the reinforcing bar nets P are suspended and fixed, and the reinforcing bar cage 10 is manufactured. It is assumed that a fixed reinforced cage assembly base 14 and a movable reinforced cage assembly base 15 which can be freely moved to and from the fixed reinforced cage assembly gantry 14, which are main devices for manufacturing the reinforced cage, are already provided in the construction yard Y. Further, in the present invention, it is assumed that a reinforcing bar net receiving portion RP (panel receiving portion) is provided at a position facing each other at a lower portion of each of the fixed type and movable type reinforcing bar assembly assembling bases 14 and 15. Under such circumstances, rebar basket 1
0 is manufactured in the following manner.

The reinforcing jig 16 for erection of the reinforcing net is attached to the uppermost circumferential reinforcing bar CR1 reinforced with U bolts or the like on the reinforcing net temporary mounting base 12.
And hang it on a main hook F1 such as a crawler crane. In addition, as a fulcrum at the time of erection of the reinforced mesh, the steel pipe C (for example, φ60 mm) is suspended at the lower stage by the sub hook F2, and the reinforced mesh P is established. The structure of the reinforcing jig 16 for erection of a reinforcing steel net is H
It is a simple one in which a hook flange is provided on a steel material, and has a structural strength capable of suspending the reinforced mesh P while being suspended from above by the main hook F1 (FIG. 6).
reference).

Next, the inner and outer rebar nets P1, P2 are respectively suspended toward the rebar net receiving portion RP along the inner facing surfaces of both the fixed type and the movable type rebar cage assembly bases 14, 15,
The lower end of the rebar net P is placed on the rebar net receiving portion RP (see FIG. 7). When the reinforced mesh P is placed on the reinforced mesh receiving portion RP, the reinforced mesh P is hanged on the reinforced mesh fixing bracket TK (for example, car lashing) to be fixed along both the assembly bases 14 and 15. The rebar net receiving portion RP is formed by processing and connecting steel materials so as to show good joining properties with the lower end surface shape of the rebar net P, and the size and shape of the rebar cage assembly bases 14 and 15 and the rebar net P It is manufactured as appropriate.

Step 5 to (Reinforcing Step) Next, a predetermined number of stirrup bars SR are laid over the inner and outer rebar networks P1, P2 to perform stirrup reinforcing (FIG. 8).
reference). The mounting position of the stirrup bar SR is determined in consideration of the reduction of the number of mechanical joints in the moving space at the time of placing concrete, the piping location in the building, and the lap joint. Usually, this stirrup reinforcement is sequentially performed from the lower part of the reinforcing bar network P to the upper part. When the rebar arrangement work is completed, the movable rebar cage assembling base 15 is moved to the side wall design width by the power cylinder 15a.
By moving the stirrup bar SR and the reinforcing bar network P with certainty by moving the stirrup bar SR and the reinforcing bar network P by using the like and the like (see FIG. 9), the stirrup bar SR and the inner and outer reinforcing bar networks P1, P
And 2 are connected by a line. Furthermore, reinforcing bars (not shown) are provided in both the circumferential direction and the vertical direction (not shown),
mm).

Step 6 (Conveying Step) First, in preparation for the work of removing the reinforcing cage hanging jig 17 after the reinforcing cage 10 is transferred, a master rope and a slinging lip are installed on the upper part of the reinforcing cage 10. This is an operation performed from the viewpoint of previously completing high-altitude operations on the reinforcing bar basket assembling bases 14, 15 on which the workers and the like can easily perform various operations on the upper portion of the reinforcing bar cage 10. Then, the reinforcing bar cage 10 completed in the above-mentioned step 5 is connected to a reinforcing bar hanging jig 17 at the upper end thereof and is suspended and conveyed by a crawler crane via the reinforcing bar hanging jig 17 (see FIG. 10).
This rebar cage hanging jig 17 is formed by appropriately combining, for example, H steel material or the like to form a frame structure as shown in FIG. 12, and has an upper surface and a lower surface, each of which has a hook with a lifting heavy machine such as a crane. An upper hanging piece UP for connection or a lower hanging piece DP for connecting to a reinforcing basket 10 connected below is appropriately arranged. As a transport destination of the reinforcing rod cage 10, for example, as shown in FIG. 11, for example, an H steel material 18a that is appropriately spaced according to the size of the reinforcing rod basket 10 is poured into the ground with an appropriate rooting length and fixed temporarily. The gantry 18 is installed. After the rebar cage 10 conveyed to the rebar cage temporary mounting base 18 is attached with the fall prevention fitting 18b, the rebar cage hanging jig 17
Will be removed.

Through the various working steps in the present invention, various devices can be effectively diverted at the time of manufacturing the reinforcing rod cage, so that the reinforcing rod basket 10 can be efficiently and simply assembled without complicated work. The production can be performed, and as a result, a great improvement effect can be achieved in all aspects of work efficiency, personnel cost and equipment cost.

[0020]

As described in detail above, the method for manufacturing a reinforcing bar cage according to the present invention is a method of assembling a fixed reinforcing bar cage in which reinforcing bar panels that are assembled in a substantially planar shape to form a reinforcing bar cage are suspended and fixed. A method of manufacturing a reinforcing bar cage, comprising a gantry and a movable reinforcing bar cage assembly cradle that can be moved to and away from the fixed reinforcing bar cage gantry, wherein the fixed and movable reinforcing bar cage gantry is provided. A reinforcing bar panel mounting step of suspending the reinforcing bar panel from above and mounting the lower end of the reinforcing bar panel to the panel receiving portion with respect to a panel receiving portion provided at a position facing each other at each lower portion of the reinforcing bar panel; The reinforcing bars respectively mounted on the panel receiving portion in the mounting step are fixed along the reinforcing bar assembly base by a detachable panel fixing tool, and then the hanging jig for hanging the reinforcing bar panel is removed. Panel fixing process, Through a panel fixing step, the distance between the reinforcing bars respectively fixed to the two reinforcing bar assembly frames is adjusted to a predetermined distance by moving the movable reinforcing bar assembly frame, and a reinforcing process of performing various bar arrangements, and through the respective processes. After attaching a reinforcing cage hanging jig to the upper end of the completed reinforcing cage, the panel fixing device that fixed the reinforcing bar panel and the reinforcing bar assembly base in the panel fixing step is removed, and the transporting process of transporting the other to the other is performed. It is characterized by becoming.

Therefore, according to the present invention, a hanging beam is attached to every reinforcing bar panel as in the conventional method of manufacturing a reinforcing cage, and a pair of front and back sides is actually entered into a reinforcing cage manufacturing process on a reinforcing cage assembly base. It is no longer necessary to fix the reinforcing bars by connecting the respective suspension beams together with the connecting girder material and work on them.Therefore, it is possible to ensure both significant work efficiency and reduction in personnel and equipment costs. It becomes possible to aim at.

In addition, in the present invention, the suspension beam does not have to be used until the completion of the production of the reinforcing cage, and even in the case of producing a reinforcing cage using a huge number of reinforcing panels in a large-scale construction, it is possible to use the suspending beam. The initial investment for beam fabrication can be minimized considering the diversion, greatly contributing to cost reduction of the whole construction. In addition, when performing the work of moving the movable rebar cage assembly base to the predetermined width of the rebar cage relative to the fixed rebar cage assembly base described above, the positional relationship between the opposing rebar panels waited for subsequent correction. Can be secured and maintained.

In addition, the present invention can be applied to construction of not only underground structures but also above-ground structures, and has wide versatility.

[Brief description of the drawings]

FIG. 1 is a flowchart showing an example of a method for manufacturing a reinforcing bar cage according to the present invention.

FIG. 2 is an explanatory view showing a circumferential bar arrangement work in the actual procedure of the reinforcing bar cage manufacturing method of the present invention.

FIG. 3 is an explanatory diagram showing a vertical reinforcing bar arrangement work in the actual procedure of the reinforcing cage manufacturing method of the present invention.

FIG. 4 is an explanatory view showing an operation of attaching a horizontal moving hanging jig in the actual procedure of the method of manufacturing a reinforcing rod cage according to the present invention.

FIG. 5 is an explanatory diagram showing a rebar net temporary storage place mounting operation in the actual procedure of the rebar cage manufacturing method of the present invention.

FIG. 6 is an explanatory diagram showing a reinforcing net construction work in the actual procedure of the reinforcing cage manufacturing method of the present invention.

FIG. 7 is an explanatory view showing, among the actual procedures of the method for manufacturing a reinforcing bar cage according to the present invention, an operation of suspending the reinforcing bar cage on a reinforcing bar assembly frame.

FIG. 8 is an explanatory diagram showing a stirrup reinforcing work in the actual procedure of the reinforcing cage manufacturing method of the present invention.

FIG. 9 is an explanatory diagram showing a slide widening operation of the reinforcing bar assembly assembling step in the actual procedure of the reinforcing bar basket manufacturing method of the present invention.

FIG. 10 shows an actual procedure of a method of manufacturing a reinforcing rod cage according to the present invention.
It is explanatory drawing which shows the rebar basket carrying-out operation | work from a rebar basket assembly stand.

FIG. 11 shows an actual procedure of a method of manufacturing a reinforcing rod cage according to the present invention.
It is explanatory drawing which shows the conveyance fixing operation of a reinforcement basket to a reinforcement cage temporary installation stand.

FIG. 12A is a plan view of a reinforcing cage hanging jig used in manufacturing a reinforcing cage of the present invention, and FIG. 12B is a side view of the same.

[Explanation of symbols]

 P Reinforcing mesh (reinforcing panel) RP Reinforcing mesh receiving section (reinforcing panel receiving section) TK Reinforcing mesh fixing bracket (panel fixing) 10 Reinforcing cage 14 Fixed reinforcement cage assembly stand 15 Mobile reinforcement cage assembly stand 16 Hanging jig (hanging jig for hanging) 17 Hanging jig for reinforced cage

Claims (1)

[Claims] 1. A fixed rebar cage assembly base and a movable bar that can be freely moved in and out of the fixed rebar cage assembly rack, each of which suspends and fixes a reinforcing bar panel that is assembled in a substantially planar shape so as to form a rebar basket. A method of manufacturing a reinforcing bar cage comprising a reinforcing bar cage assembling base and a panel receiving portion provided at a position facing each other in each lower portion of the fixed and movable reinforcing cage assembly frames. ,
A reinforcing bar panel placing step of suspending the reinforcing bar panel from above and placing the lower end of the reinforcing panel in the panel receiving portion; and a reinforcing bar panel placed on the panel receiving portion by the reinforcing bar panel placing step. A panel fixing step of fixing along the reinforcing cage assembly base with a detachable panel fixing tool, and subsequently removing a hanging jig for hanging the reinforcing bar panels, The fixed reinforcing bar panel distance is adjusted to a predetermined distance by moving the movable reinforcing cage assembly base to perform various reinforcing arrangements, and the reinforcing rod cage is suspended at the upper end of the reinforcing cage completed through the respective steps. A method of manufacturing a reinforcing bar cage, comprising, after attaching a jig, removing a panel fixing tool fixed to the reinforcing bar panel and the reinforcing bar assembly gantry in the panel fixing step and transporting the panel fixing device to the other. .