JP2004150251A - Replacement of corroded deteriorated handrail by reuse of existing driving anchor material, and its construction method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To reuse a driving anchor itself even if the surface of an existing driving anchor material is rusted and corroded, because it has sufficient plate thickness and strength. <P>SOLUTION: Cleaning is carefully performed on the surface of the existing driving anchor material, and an welding auxiliary material is welded and fixed to a base material surface of the anchor material so that the existing anchor material and the welding auxiliary material can be firmly welded and fixed. In the remarkably corroded driving anchor material, a skeleton is chipped off, and a new anchor material is installed. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention is a method for replacing existing handrails by replacing existing handrails with new aluminum handrails without reducing the strength of the existing frame.
[0002]
[Prior art]
In the conventional replacement method, core construction was carried out on the skeleton concrete to embed and fix the new handrail support, or replacement work was performed by fixing the base of the new support with a plug anchor.
[0003]
[Problems to be solved by the invention]
In the conventional method of coring cored concrete and embedding and fixing the pillars, in the case of balcony handrails or common corridor handrails, the reinforcing bar at the top end of the balcony or common corridor must be cut off. There is a problem that the cutting of the rebar significantly reduces the conventional strength of balconies and common corridors. In addition, when the plug anchor was fixed, the new handrail support material was not embedded in the skeleton, and the stigma of the handrail support was extremely large, which was a concern for residents about the handrail.
[0004]
[Means to solve the problem]
In order to solve the above-mentioned problems, the present invention can be replaced with a new handrail by a method that does not cut a reinforcing bar without causing a reduction in the strength of the skeleton. In addition, the welding auxiliary material and the existing driving anchor material are integrated by welding, and the handrail pillar base reinforcing material is fully embedded in concrete and fixed in the same state as the existing handrail.
[0005]
BEST MODE FOR CARRYING OUT THE INVENTION
The present invention considers a problem due to a decrease in the mounting strength of a pillar due to a decrease in concrete strength in the future and a prevention of swinging of a column head of a handrail pillar material by reusing an existing driving anchor material having the highest reliability in strength. It is a method of construction.
[0006]
Upon reuse of the existing implanted anchor material, rust and corroded portions on the surface of the anchor material are carefully scraped so that the welding auxiliary material can be firmly welded.
[0007]
Auxiliary materials for welding use square pipes, round pipes, and bent steel sheet moldings, and have a length up to about 17 cm, which is sufficient for welding work.
[0008]
A non-shrink mortar material or an epoxy resin material is filled up to the upper end of the welding auxiliary material so that the existing driving anchor material is not in direct contact with air.
In addition, the gap between the remaining strut material and the welding auxiliary material is filled with a non-shrink mortar material or an epoxy resin material to prevent water from entering, thereby preventing corrosion of the existing driving anchor material.
[0009]
After the above work is completed, the newly installed handrail strut reinforcement is inserted into the auxiliary welding material, and the two materials can be integrated by firmly welding and fixing to the welding auxiliary material from the loose hole processing portion of the newly installed handrail strut reinforcement. .
[0010]
The new handrail support is integrated with the skeleton by the existing driving anchor material, welding auxiliary material, new handrail support, and non-shrink mortar material or epoxy resin material.
[0011]
By inserting and attaching the replacement new handrail support to the new handrail support reinforcing material in the above state, the external force applied to the new handrail can be reliably transmitted and dispersed to the frame.
[0012]
【Example】
The embodiment will be described with reference to the accompanying drawings. The existing corroded handrail shown in FIGS. 1 and 2 is cut and removed at the base of the existing handrail support 2 shown in FIG. As shown in FIG. 5, a welding auxiliary member 5 is fixed to the existing driving anchor 4 by welding to the inner periphery of the existing post remaining portion 2 of FIG. 4. After confirming that the welding auxiliary member 5 is firmly fixed, the non-shrinkable mortar material is filled up to the upper end of the welding auxiliary member 5, and after hardening, epoxy is inserted into the gap between the remaining support member 2 and the welding auxiliary member 5. The resin material is filled up to the upper end of the existing strut material. If the gap between the existing remaining pillar material and the welding auxiliary material is large, a non-shrink mortar material is filled. As shown in FIG. 6, the existing driving anchor material 4 and the existing remaining strut material 2 and the welding auxiliary material 5 are integrated.
Next, the new handrail post reinforcement 6 is inserted into the auxiliary welding material 5, and the new handrail post reinforcement 6 is fixed to the welding auxiliary material through the loose hole of the new handrail post reinforcement 6. Insert the new handrail support 7 shown in Fig. 7 into the new handrail support, and secure all the new handrail parts with screws 8 to complete it as shown in Fig. 9 cross-sectional view.
[0013]
The welded portion in the embodiment shown in FIG. 5 and the welded portion in the loose hole shown in FIG.
[0014]
The filling of the non-shrink mortar material or the epoxy resin material in the embodiment shown in FIG. 5 is performed without fail so that the driving anchor material 4 and the existing remaining strut material 2 do not corrode due to intrusion of water or the air and come into contact with the air. Shall be
[0015]
In the embodiment shown in FIG. 9, the sealing material 9 at the base of the newly-installed handrail strut 6 is used to prevent water from entering from the base of the strut and to expose the exposed portion of the remaining existing strut 2 to the existing concrete nose tip base 3. It shall be performed without exposure to rain.
[0016]
【The invention's effect】
The present invention is implemented in the form described above, and has the following effects.
[0017]
By reusing existing driving anchor materials, it is possible to replace new handrails without lowering the frame strength.
[0018]
Further, since the external force applied to the newly-installed replacement handrail can be reliably transmitted to the skeleton, it is possible to install the newly-installed handrail sufficiently capable of withstanding typhoon pressure and daily life load.
[0019]
By filling the existing driving anchor material and the existing remaining strut material with a non-shrink mortar material or epoxy resin material and laying the root wound sealing material, the two materials do not directly contact the air, and It leads to corrosion deterioration prevention.
[0020]
In the coring method, the embedding part of the handrail strut is in a state of no rebar due to cutting of the reinforcing bar, and the lack of concrete when the tensile force is applied to the skeleton concrete by the external force applied to the handrail post, and the lack of mounting strength due to the deterioration of the skeleton concrete There are no points.
[0021]
The new replacement handrail strut is now fully embedded in the skeleton with the auxiliary welding material, and the handrail strut can be replaced with a handrail without shaking.
[Brief description of the drawings]
FIG. 1 is a view of an existing handrail in which corrosion has progressed.
FIG. 2 is a sectional view of an existing handrail in which corrosion has progressed.
FIG. 3 is a detailed cross-sectional view of an existing handrail in which corrosion has progressed.
FIG. 4 is a plan cross-sectional view of the cutting of an existing handrail supporting column material in which corrosion has progressed.
FIG. 5 is a plan cross-sectional view of the existing handrail support of the present invention in which a new welding auxiliary material is attached to the remaining portion.
FIG. 6 is a longitudinal sectional view in which an auxiliary material for welding a new handrail and a reinforcing material for a new handrail support are attached to the existing embedded anchor material of the present invention.
FIG. 7 is a plan sectional view in which a newly-installed handrail support member is attached to the newly-installed handrail support member of the present invention.
FIG. 8 is a front detailed view of a newly-installed handrail replaced by the method of the present invention.
FIG. 9 is a longitudinal sectional view of a newly-installed handrail replaced by the method of the present invention.
[Explanation of symbols]
1 Existing handrail cap 2 Existing handrail support 3 Existing balcony nose tip stand 4 Existing driving anchor material 5 New welding auxiliary material 6 New handrail support reinforcing material 7 New handrail support material 8 New handrail support material fixing screw 9 Root-wrap sealing material 10 New installation Handrail shade wood

Claims (5)

Handrail replacement method that reuses existing driving anchor materials. A construction method by attaching a welding auxiliary material to weld and fix the newly installed handrail support to the existing driving anchor material. A method of injecting non-shrink mortar material or epoxy resin material to the upper end of the auxiliary material as a corrosion prevention measure for the auxiliary material for welding. A method of injecting non-shrink mortar or epoxy resin into the gap between the auxiliary welding material and the remaining existing pillar material to integrate the corrosion prevention treatment of both materials and the two materials. A welding method in which a welding auxiliary material welded and fixed to an existing driving anchor material and a new handrail support material are welded and fixed from a loose hole, and the two materials are integrated.

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