JPH09125317A - Reinforced construction of reinforced concrete column base and reinforcing method thereof - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make field construction easy and simple, and improve labor saving, working rapidity, and reliability of quality of field construction. SOLUTION: A steel plate is spacedly wound around a reinforced concrete column base 1. The steel plate is constituted of steel elements having nonwellded mechanical engagement joints 5 formed in the lengthwise direction on both ends, and the steel elements are composed of flat plate-like steel elements 6 and almost squarely bent steel elements 7. The respective elements 6, 7 are continuously fixed with each other through the engagement joints 5. The above- mentioned space is filled with undefined shaped hardening material 4. Because the respective elements 6, 7 are connected together through the engagement joints 5 accompanied with no weld, the field construction is not only easy and simple, but anticorrosive metal or surface treated metal can be also used for the elements. In the figure, 2 shows main reinforcement and 3 shows belt reinforcement. Further, it is favorable to form the steel elements 6, 7 out of steel sheet piles.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a reinforcing structure and a reinforcing method for a reinforced concrete column base structure in the field of civil engineering, harbor, and construction, and particularly, as a reinforcing bar function for ensuring earthquake resistance, high function and labor saving The present invention relates to a reinforcing structure and a reinforcing method for a steel-wound reinforced concrete column base that can be pursued by

[0002]

2. Description of the Related Art In response to the direct hit of the Great Kobe Earthquake, it has become clear that the amount of stirrups in existing reinforced concrete column base structures is significantly insufficient in order to improve seismic resistance in recent years. Therefore, a method of reinforcing the reinforced concrete structure with a steel plate winding, which can be expected to improve the seismic performance, has been attracting attention by replacing the shortage of the strips with a steel plate. FIG. 23 shows a conventional reinforcing structure for a reinforced concrete column base by winding a steel plate. In the figure, steel plates are wound around an existing reinforced concrete column base 52 having a plurality of main bars 50 extending in the vertical direction and having a plurality of strips 51 in the circumferential direction at intervals. Steel plate is reinforced concrete column base 5
The flat steel plate 53 and the reinforced concrete column base 5 that surround the flat surface of 2
The flat steel plate 53 is composed of a corner steel plate 54 surrounding the two corners.
And the end of the corner steel plate 54 are fixed by seam welding. An amorphous hardening material 55 such as mortar is filled and solidified in the gap between the reinforced concrete column base 52 and the steel plate. In the figure, 56 is a backing metal.

[0003]

However, as shown in FIG.
The conventional method for reinforcing reinforced concrete by winding steel sheet as shown in Fig. 3 is structurally based on a tensile force acting in the circumferential direction and is premised on seam welding on site, and has the following drawbacks. (1). I am worried about the reliability of the welding quality in seam welding of the on-site joints of the steel plate members that make up the steel plate winding structure.
In addition, temporary construction and large-scale scaffolding for field welding are required,
The complexity of the work and the cost increase. (2). Further, when corrosion-resistant metal such as stainless steel or high-strength steel is used, the tendency of deterioration of welding quality becomes more remarkable. (3). Furthermore, when using a surface-treated steel sheet such as plating or painting, it is necessary to perform anti-corrosion measures such as pre-treatment of surface material such as shavings and post-treatment such as touch-up painting at the site at the welded part, which is a complicated task at the site. Is inevitable.

The present invention was created in view of the problems of the prior art. The object of the present invention is to provide a steel plate having a reinforcing structure for use in steel plate-wound reinforced concrete without mechanically welding. To provide a reinforcing structure and a reinforcing method for a reinforced concrete column pedestal that facilitates and simplifies on-site construction by using steel elements having various fitting joints, saves labor and speed on-site construction, and improves quality reliability. Is.

[0005]

In order to solve the above-mentioned problems, the present invention is a reinforcing structure for a reinforced concrete column base in which the periphery of the reinforced concrete column base is closed with a steel plate for reinforcement, and the steel plate has a fitting joint. Steel element,
Adjacent steel elements are fitted together by the fitting joint to close the periphery of the reinforced concrete column base while maintaining a gap, and in the gap formed between the reinforced concrete column base and the steel element. Is characterized in that an amorphous curable material is filled and solidified. And, as in the present invention, using a steel element having a fitting joint as a steel sheet of a reinforcing structure used for steel-wrapped reinforced concrete not only facilitates and simplifies on-site construction itself, but also does not involve welding as a on-site joint. Becomes a joint,
Labor-saving and speedy on-site construction and quality reliability can be dramatically improved.

Further, the steel element having a fitting joint may be made of a corrosion-resistant metal. Further, the steel element having a mating joint may be formed from surface treated metal. As described above, since the steel elements can be connected by the mechanical joint without welding, they can be formed of anticorrosive metal or surface-treated metal.

A part of the steel plate is a half-cut body of a sheet pile having a fitting joint, and the half-cut body serves as a fitting joint portion. Further, the steel element having the fitting joint may be formed only from a steel sheet pile. If a steel sheet pile is used as a part or the whole of the steel element having a fitting joint, the secondary workability of the steel material is reduced, and further rationalization can be promoted.

Further, the steel elements having the fitting joints can be arranged in a staggered manner over the upper and lower reinforcing structures. By staggering the steel elements,
Not only can the horizontal displacement of the upper and lower reinforcing structures be prevented, but the tensile load in the circumferential direction is evenly distributed to the upper and lower reinforcing structures, so that the entire reinforcing structure can be further strengthened.

In order to solve the above problems, the present invention provides a method for reinforcing a reinforced concrete column base by closing the periphery of the reinforced concrete column base with a steel plate for reinforcement, and a steel element having a fitting joint as the steel plate. Using, the adjacent steel elements are fitted in the fitting joint and closed while maintaining a gap between the column base and the periphery of the reinforced concrete column base, and the reinforced concrete column base and the steel element It is characterized in that the above-mentioned gap formed between them is filled with an indeterminate curable material and solidified.

Further, in order to solve the above-mentioned problems, the present invention relates to a method for reinforcing a reinforced concrete column base by closing the periphery of the reinforced concrete column base with a steel plate to provide a steel element having a fitting joint as the steel plate. Using
Adjacent steel elements are fitted to each other with the fitting joint, and the periphery of the reinforced concrete column base is closed while maintaining a gap with the column base, and then pretension is applied to the fitting joint part. After eliminating the clearance of the fitting joint, the above-mentioned gap formed between the reinforced concrete column base and the steel element is filled with an indeterminate hardening material and solidified. In this way, by eliminating the clearance of the joint fitting part of the steel element and filling and solidifying the amorphous hardened material with the pretension applied to the extent that does not reduce the rigidity, reliable reinforcement of the reinforced concrete column base The structure can be obtained.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described with reference to FIG. FIG. 1 is a perspective view of a reinforcing structure for a reinforced concrete column base of the present invention. In the figure, an existing reinforced concrete column pedestal 1 has a plurality of main bars 2 extending in the longitudinal direction.
And a plurality of stirrups 3 in the circumferential direction. A steel plate is wound around the reinforced concrete column base 1 with a gap provided between the column base and the column base. The steel plate is made of a steel element having a first embodiment of a non-welding mechanical fitting joint 5 formed in the longitudinal direction of both ends, and in the present embodiment, is made entirely of steel sheet pile. More specifically, the steel plate is a plate-shaped steel element 6 that surrounds the plane portion of the reinforced concrete column base 1, that is, a straight steel sheet pile, and a steel element 7 that is bent at a substantially right angle that surrounds the corner portion of the reinforced concrete 1, that is, bent. Each of the steel elements 6 and 7 is mechanically connected and fixed by fitting joints 5 and 5. A space between the reinforced concrete column base 1 and a steel element surrounding the reinforced concrete 1 is filled with an indeterminate hardening material 4, such as mortar or resin, and solidified. The amorphous curable material is preferably a non-shrinkable material having a slight expansion property. Since the above steel elements are mechanically connected and fixed by a fitting joint, they may be made of corrosion-resistant metal such as stainless steel or high-strength steel, or made of steel material such as high-tensile steel whose welding quality is difficult to ensure. Alternatively, it may be formed of a surface-treated metal such as galvanized or painted metal. If steel sheet piles are used as a whole as in the present embodiment, the degree of secondary working of the steel sheet is reduced, and further rationalization can be promoted. FIG. 2 is an enlarged view of the fitting joint used in this embodiment. As the fitting method of the fitting joint 5, first, the lower end of one steel element 6 is lifted to the upper end of the other steel element 7, and the one steel element 6 is placed in the joint 5 of the other steel element 7. After inserting the joint 5 of No. 1, one steel element 6 may be lowered as it is.

Next, a first embodiment of the method for reinforcing a reinforced concrete column base of the present invention will be described. First, while providing a gap around the reinforced concrete column base 1, the fitting joint 5 of the flat plate steel element 6 and the fitting joint 5 of the adjacent bent steel element 7 are fitted to each other to form a flat plate. The steel elements 6 and the bent steel elements 7 are alternately arranged by fitting the respective fitting joints, and the steel elements 6 and 7 surround the entire circumference of the reinforced concrete column base 1. , Close to the same shape as the pedestal. After that, the above-mentioned gap between the steel elements 6 and 7 and the reinforced concrete 1 is filled with the amorphous hardening material 4 made of, for example, mortar, resin or the like and solidified.

Generally, a fitting joint is required to have an appropriate clearance from the viewpoint of ensuring proper fitting and absorbing a manufacturing error of a steel element. In some cases, which may reduce the reinforcing effect. In order to solve this, a method of injecting mortar or resin into the clearance is adopted, but there is a problem that the construction is complicated and the reliability of construction quality is low, leading to price increase.

Therefore, after the steel element having the fitting joint is joint-fitted to the outer peripheral portion of the column base to be closed in a rectangular shape, a circular shape or an elliptical shape, the clearance of the joint fitting portion of the steel element is eliminated. Build a reliable reinforcing structure for existing reinforced concrete column bases by filling the gap between the steel element and the reinforced concrete column base with a non-standard hardened material and solidifying it while pretensioning to the extent that it does not reduce the rigidity of the joint. be able to. As a method of introducing this pre-tension, a reaction jig is installed near the fitting joint itself and the fitting joint is pulled so as to separate it in the longitudinal direction, and a reaction force using the reinforced concrete column base as a reaction force. There is a method of expanding the steel element closed by using a jig to the outside.

A second embodiment of the method for reinforcing a reinforced concrete column base of the present invention using the former reaction force jig will now be described. FIG. 3 is an explanatory view of a reinforcing method for providing a pretension by attaching a reaction force jig for achieving the former method in the vicinity of the fitting joint, and FIG. 4 is an enlarged view of the reaction force jig. Further, the same reference numerals are given to the structural parts common to the above-described first embodiment, and the duplicated description will be omitted. The same applies to other embodiments or examples described below. In the figure, the reaction force jig 10
Is composed of anchor blocks 13 and 15 to which nut portions 11 and 12 are attached respectively, and a rod 20 having a grip portion 16 at the center and screw portions 17 and 18 which are threaded in opposite directions at both ends. The screw parts 17 and 18 are screwed into the nut parts 11 and 12, respectively, and by rotating the grip part 16 in the forward or reverse direction, the anchor blocks 13 and 1 can be rotated.
The lengthwise distance between the five can be expanded or contracted. During use, the anchor blocks 13 and 15 are fixed to the steel elements 6 and 7 by magnets or adhesives, respectively.

Next, a reinforcing method of the second embodiment of the reinforcing method will be described. First, the steel elements having the fitting joints 5 and 5 are joint-fitted and closed while providing a gap in the outer peripheral portion of the column base 1, and then the anchor blocks 13 and 15 are made of steel respectively near the joint fitting portion. It is fixed to the elements 6 and 7 with a magnet or an adhesive material. And the anchor block 13,
The grip 16 at the center of the rod 20 is rotated so that the distance between the rods 15 increases, and the steel elements 6 and 7 are pulled so as to separate them in the longitudinal direction. Clear the clearance. After that, with the pretension applied to the joints 5 and 5 to the extent that the rigidity of the fitted joint 5 is not reduced, the amorphous hardened material 4 is filled in the gap between the steel elements 6 and 7 and the reinforced concrete column base 1. And solidify.

A third embodiment of the method for reinforcing a reinforced concrete column base of the present invention using the latter reaction force jig will now be described. FIG. 5 is an explanatory view of a reinforcing method for applying pre-tension to the fitting joint using a reaction force jig for achieving the latter method, and FIG. 6 is an enlarged view of the reaction force jig. The reaction jig 21 is a steel element 7 that is bent substantially at a right angle.
A pair of openings 22 and 22 bored in the flat part of the plate, and a nut integrally fixed to the flat part 23 by welding so as to match the axis of the openings 22 and 22 inside the flat part 23. It is composed of parts 24, 24 and a pair of long bolts 25, 25 screwed to the nut parts 24, 24. Long bolt 2
Even after the tip of 5 collides with the reinforced concrete column base 1, when the long bolt is rotated, the long bolt 25 makes the reinforced concrete column base 1 a reaction force to move the closed steel element to the outside as shown by an arrow. Unfold, that is, steel element column base 1
To move in a direction away from the fitting joints 5, 5
The clearance inside is eliminated and the joint is pretensioned.

Next, the reinforcing method of the third embodiment of the reinforcing method will be described. First, the steel element having the fitting joints 5 and 5 is fitted and closed while providing a gap on the outer peripheral portion of the reinforced concrete column base 1, and then the pair of long bolts 2
When 5 and 25 are rotated and the tips of the long bolts 25 are rotated even after they are in contact with the column base 1, the long bolts 25 use the column base 1 as a reaction force to move the closed steel element to an arrow (see FIG. 6). ), That is, the steel element is moved in a direction in which it is separated from the column base 1, the clearance in the fitting joints 5 and 5 is eliminated, and pretension is applied to the joint. Then, with the joint pre-tensioned to such an extent that the rigidity of the fitting 5 is not lowered, the amorphous hardening material 4 is filled into the gap between the steel element and the reinforced concrete column base 1 and solidified.

FIG. 7 is a plan view showing a second embodiment of the reinforcing structure for a reinforced concrete column base of the present invention. The present embodiment is a modified example of the plane-closed structure of the flat steel element 6 and the bent steel element 7, in which a plurality of flat steel elements 6 are continuously joint-fitted,
It is applied to the reinforcement structure of a large column base 1. In this embodiment as well, the steel elements 6 and 7 are made of only steel sheet piles as in the first embodiment.

FIG. 8 is a plan view showing a third embodiment of the present invention. In this embodiment, the half-cut bodies 26, 26 obtained by cutting the steel sheet pile in half in the longitudinal direction are used. That is, in this embodiment, the steel element is composed of the half-cut body 26 having the fitting joint 5 and the steel plate 27.
The fitting joints 5 of 6 are fitted to each other, and the half-cut body 26 functions as a fitting joint portion. Further, the part of the half-cut body 26 that does not have the fitting joint may be welded to the steel plate 27 at the factory.
In the present embodiment, since the steel sheet pile is used as a part of the steel element, the secondary workability of the steel sheet is reduced, and the rationalization can be promoted.

FIG. 9 is a perspective view showing a fourth embodiment of the present invention. In this embodiment, a steel element made of a half-cut steel sheet pile 26 and a steel sheet 27 is used for the plane portion, and a bent steel sheet pile 7 is used for the corner portion. The present embodiment can obtain the same effects as those of the third embodiment.

FIG. 10 is a plan view showing the fifth embodiment. In this embodiment, a steel element is wound around the outer periphery of a rectangular reinforced concrete column base 1 in a cylindrical shape,
The amorphous reinforcing material 4 such as mortar or resin is filled in the gap between the steel element and the steel element and solidified to make the entire reinforcing structure cylindrical. The steel element comprises a steel sheet pile half body 26 having a fitting joint 5 and a steel plate 27.

FIG. 11 is a plan view showing the sixth embodiment. In the present embodiment, a steel element is wound around the outer periphery of a circular reinforced concrete column base 1 in a cylindrical shape,
The amorphous shaped hardening material 4 such as mortar or resin is filled in the gap between the steel element and the steel element and solidified. The steel element comprises a steel sheet pile half body 26 having a fitting joint 5 and a steel plate 27.

FIG. 12 is a plan view showing a reinforcing structure to which the second embodiment of the fitting joint is applied. The female joint 30 of the fitting joint 28 is composed of a hollow arc-shaped fitting portion having a slit 29 in the longitudinal direction, and the male joint 31 of the fitting joint 28 inserted into the female joint 30 is T-shaped. It consists of an engaging part. The steel elements used in this reinforcing structure are all flat steel elements 6, for example, straight steel sheet piles are applied.

FIG. 13 is a plan view showing a reinforcing structure to which a second embodiment of the fitting joint similar to that of FIG. 12 is applied. In this embodiment, the fitting joint of the second embodiment of the fitting joint is applied instead of the fitting joint of the first embodiment shown in FIG.
FIG. 14: is a top view which shows the reinforcement structure to which the fitting joint of 2nd Example of the fitting joint similar to FIG. 2 was applied. The steel element used for this reinforcing structure is, for example, a product obtained by bending two steel sheet piles. FIG. 15 is a plan view showing a reinforcing structure to which the third embodiment of the fitting joint is applied.
This fitting joint 28 is a male joint 31 having a circular engaging portion.
And a female joint 30 having a hollow arc-shaped fitting portion having a slit 29. The steel element used for this reinforcing structure is, for example, a product obtained by bending two steel sheet piles.

There are welding build-up method, cutting molding method, sheet bending molding method, hot pressing molding method, and hot rolling molding method for forming the shape of the fitting joint, but this joint steel material requires high strength. Therefore, it can be said that hot pressing and hot rolling shaping are excellent joints that can exhibit large tensile strength at low cost. Table 1 shows the types of joint shapes applicable as fitting joints for steel elements.

[0027]

[Table 1]

In Table 1, the fitting joint a includes a male fitting having a circular engaging portion whose cross-sectional shape is a fitting portion, and a female fitting having a hollow arc-shaped fitting portion having a slit. The fitting joint b is composed of
A fitting joint comprising a male joint having a T-shaped engaging portion and a female joint having a hollow rectangular fitting portion having a slit. The fitting joint c is a cross-sectional shape of the fitting portion. Is a fitting joint comprising a male joint having a T-shaped engaging portion and a female joint having a hollow arc-shaped fitting portion having a slit,
The fitting joint d is a male joint having an engaging portion that is bent in the reverse direction to form a slit in the cross-sectional shape of the fitting portion,
The fitting joint is a female joint that fits in the slit of the engaging portion and has a fitting portion that is bent in the reverse direction. The fitting joint e has a T-shaped cross-section. Is a fitting joint consisting of two male joints each having an engaging portion and one female joint having two engaging portions that engage with the engaging portions of the two male joints. In the cross-sectional shape of the fitting portion, f is fitted to the two male joints provided with the engaging portions that are inverted and bent in opposite directions to form slits, and the slits of these two male joints. A fitting joint comprising a female fitting having an oblong fitting portion having a slit, wherein the fitting joint g has a hollow arc-shaped engaging portion having a slit in cross section. The fitting joint includes a male joint and a female joint including a hollow arc-shaped fitting portion having a slit.

FIG. 16 is a front view showing a first embodiment in which the reinforcing structure of the present invention is applied to an existing reinforced concrete column base. In this embodiment, the reinforcing structure 32 is installed on the column base 1 only once.

FIG. 17 is a front view showing a second embodiment in which the reinforcing structure of the present invention is applied to an existing reinforced concrete column base. In this embodiment, the reinforcing structure 32 is installed on the column base 1 by stacking a plurality of stages, for example, three stages.

FIG. 18 is a front view showing a third embodiment in which the reinforcing structure of the present invention is applied to an existing reinforced concrete column base. In this embodiment, the reinforcing structures 32 are installed at the base and the upper end of the column base 1, respectively.

FIG. 19 is a front view showing a fourth embodiment in which the reinforcing structure of the present invention is applied to an existing reinforced concrete column base. In this embodiment, the reinforcing structures 33 are installed in a plurality of stages, and the steel elements 6 having fitting joints are arranged in a staggered manner across the upper and lower reinforcing structures 33. The staggered arrangement of the steel elements 6 not only prevents the upper and lower reinforcing structures 33 from being displaced, but also distributes the circumferential tensile load evenly to the upper and lower reinforcing structures 33, so that the entire reinforcing structure is It can be further strengthened.

FIG. 20 is a plan view showing a fifth embodiment in which the reinforcing structure of the present invention is applied to an existing reinforced concrete column base. In this embodiment, the reinforcing structures 33 in which the steel elements 6 having the fitting joints are arranged in a staggered manner are installed at the base and the upper end of the column base 1, respectively.

FIG. 21 is a plan view showing a sixth embodiment in which the reinforcing structure of the present invention is applied to an existing reinforced concrete column base. In this embodiment, a reinforcing structure 33 in which steel elements 6 having fitting joints are arranged in a staggered manner is continuously stacked from the base of the column base 1.

FIG. 22 is a plan view showing a seventh embodiment in which the reinforcing structure of the present invention is applied to an existing reinforced concrete column base. In this embodiment, a reinforcing structure 33 in which steel elements 6 having fitting joints are arranged in a zigzag manner is installed at intervals from the base to the upper end of the column base 1.

[0036]

As described above, the present invention not only facilitates and simplifies on-site construction itself by using a steel element having a fitting joint as a steel plate of a reinforcing structure used for steel plate-wound reinforced concrete. It becomes a mechanical joint that does not involve welding as an on-site joint, and can save labor and speed on-site construction and dramatically improve quality reliability. When a steel material such as a corrosion-resistant metal or high-strength steel whose welding quality is difficult to ensure is used, the effect becomes more remarkable. In addition, even if it is a corrosion-resistant surface-treated steel material that has been painted or plated in advance, if the joint part does not involve welding, the pre-treatment and post-treatment of the surface material such as painting and plating required during welding of steel materials It becomes unnecessary, and it is possible to achieve on-site construction simplicity and price reduction. Further, since the steel sheet pile is used as the steel element, the secondary workability of the steel material is reduced, and the rationalization can be further promoted. And
By staggering the steel elements, not only can the displacement of the reinforcing structure be prevented, but the tensile load in the circumferential direction is evenly distributed to the upper and lower reinforcing structures, further strengthening the entire reinforcing structure. can do. In addition, by eliminating the clearance at the joint fitting part of the steel element and filling and solidifying the indeterminate hardened material with pretension applied to the extent that rigidity is not reduced, a reliable reinforced concrete column reinforced structure is provided. Obtainable.

[Brief description of the drawings]

FIG. 1 is a perspective view of a reinforcing structure for a reinforced concrete column base according to the present invention.

FIG. 2 is an enlarged view of a fitting joint used in this embodiment.

FIG. 3 is an explanatory diagram showing a second embodiment of a reinforcing method using a reaction force jig.

FIG. 4 is an enlarged view of a reaction force jig used in the second embodiment.

FIG. 5 is an explanatory diagram showing a third embodiment of a reinforcing method using a reaction force jig.

FIG. 6 is an enlarged view of a reaction force jig used in the third embodiment.

FIG. 7 is a plan view showing a second embodiment of the reinforcing structure.

FIG. 8 is a plan view showing a third embodiment of the reinforcing structure.

FIG. 9 is a perspective view showing a fourth embodiment of a reinforcing structure.

FIG. 10 is a plan view showing a fifth embodiment of the reinforcing structure.

FIG. 11 is a plan view showing a sixth embodiment of the reinforcing structure.

FIG. 12 is a plan view showing a reinforcing structure to which a second embodiment of a fitting joint is applied.

13 is a plan view showing a reinforcing structure to which a second embodiment of a fitting joint similar to that in FIG. 12 is applied.

FIG. 14 is a plan view showing a reinforcing structure to which a second embodiment of the fitting joint is applied.

FIG. 15 is a plan view showing a reinforcing structure to which a third embodiment of a fitting joint is applied.

FIG. 16 is a front view showing a first embodiment in which the reinforcing structure of the present invention is applied to an existing reinforced concrete column base.

FIG. 17 is a front view showing a second embodiment in which the reinforcing structure of the present invention is applied to an existing reinforced concrete column base.

FIG. 18 is a front view showing a third embodiment in which the reinforcing structure of the present invention is applied to an existing reinforced concrete column base.

FIG. 19 is a front view showing a fourth embodiment in which the reinforcing structure of the present invention is applied to an existing reinforced concrete column base.

FIG. 20 is a front view showing a fifth embodiment in which the reinforcing structure of the present invention is applied to an existing reinforced concrete column base.

FIG. 21 is a front view showing a sixth embodiment in which the reinforcing structure of the present invention is applied to an existing reinforced concrete column base.

FIG. 22 is a front view showing a seventh embodiment in which the reinforcing structure of the present invention is applied to an existing reinforced concrete column base.

FIG. 23 is a perspective view showing a conventional existing reinforcing structure for a reinforced concrete column base.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Reinforced concrete column base 2 ... Main reinforcement 3 ... Band reinforcement 4 ... Amorphous hardening material 5 ... Fitting joint 6 ... Flat steel element 7 ... Bent steel element 10, 21 ... Reaction jig 26 ... ( Steel sheet pile half-die 31, 32 ... Reinforcement structure

Claims (8)

[Claims] 1. A reinforcing structure for a reinforced concrete column base in which the periphery of a reinforced concrete column base is closed and reinforced with a steel plate, wherein the steel plate is a steel element having a fitting joint, and the steel elements adjacent to each other at the fitting joint. The element is fitted and closed around the reinforced concrete column base while maintaining a gap, and the gap formed between the reinforced concrete column base and the steel element is filled and solidified with an amorphous hardening material. Reinforced concrete column base reinforced structure characterized by being 2. The reinforcing structure for a reinforced concrete column base according to claim 1, wherein the steel element having a fitting joint is made of a corrosion resistant metal. 3. The reinforcing structure for a reinforced concrete column base according to claim 1, wherein the steel element having a fitting joint is made of a surface-treated metal. 4. The steel element having a fitting joint is composed of a steel sheet pile half-cut body and a steel plate having the fitting joint, and the half-cut body functions as a fitting joint. Reinforced structure of reinforced concrete column base according to 1. 5. The reinforcing structure for a reinforced concrete column pedestal according to claim 1, wherein the steel element having a fitting joint is composed of only a steel sheet pile. 6. The reinforcing structure for a reinforced concrete column base according to claim 1, wherein the steel elements having fitting joints are arranged in a staggered manner over the upper and lower reinforcing structures. 7. A method for reinforcing a reinforced concrete column base by closing and reinforcing a periphery of a reinforced concrete column base with a steel plate, wherein a steel element having a fitting joint is used as the steel plate, and steel adjacent to the fitting joint is used. After closing the reinforced concrete column base around the reinforced concrete column base while maintaining a gap, the reinforced concrete column base and the steel element were filled with an amorphous hardening material and solidified. A method for reinforcing a reinforced concrete column base, which is characterized in that 8. A method of reinforcing a reinforced concrete column pedestal in which the periphery of a reinforced concrete column pedestal is closed with a steel plate to provide reinforcement, wherein a steel element having a fitting joint is used as the steel sheet, and steels adjacent to each other at the fitting joint are used. After closing the surroundings of the reinforced concrete column pedestal while maintaining a gap by fitting the element made of steel, after pretensioning the fitting joint to eliminate the clearance of the fitting joint, the reinforced concrete column pedestal and steel A reinforcing method for a reinforced concrete column base, characterized in that the gap formed between the element and the element is filled with an indeterminate hardening material and solidified.