JP3743721B2 - Repair method of prop - Google Patents

Description

  The present invention relates to a column repair method, and more particularly to a column repair method suitable for repairing a handrail column made of a metal tubular body.

Handrails are provided on the balconies of apartment houses such as public houses and apartments so that people, objects, etc. do not fall accidentally, or so that there are no illegal intruders in the room from the outside.
The handrail is composed of members such as a support, a headboard, a reinforcing material, and an anchor plate, and each member is formed of a metal material such as an aluminum alloy or iron. Of these members, the support is usually a hollow tubular body. It is made with.

FIG. 5 is a cross-sectional view showing a known handrail post installed on a balcony or the like of an apartment house. The handrail support 10 includes a metal hollow support 11, a lower chord member 12 and a cap 13 connected to the hollow support 11, an anchor plate 14 for fixing the hollow support 11, and a hollow support 11 fixed to the anchor plate 14. It consists of an iron reinforcement 15 inserted and fixed inside. The iron reinforcing material 15 is fixed to the anchor plate 14 by welding or the like 17.
In this handrail support column 10, an anchor plate 14 having an iron reinforcing material 15 attached to a balcony or the like is embedded in concrete 18 such as a balcony, the hollow support column 11 is inserted into the upper end of the iron reinforcing material 15, and its periphery is covered with concrete 18. It is attached. In addition, the iron reinforcing material 15 and the hollow support | pillar 11 may be fixed by welding etc. not only by insertion fitting, in order to make the coupling | bonding firm. Further, the lower chord member 12 and the headboard 13 are attached to the hollow column 11.

However, since such handrails are installed in places where they are exposed to wind and rain, if they have been exposed to wind and rain for many years, the columns, lower chord materials, headboards, anchor plates, reinforcements, etc. will corrode outside due to deterioration, etc. First of all, rainwater infiltrates from a corroded portion or a connecting portion of each member into the column 11 formed of a tubular body, and in addition, rainwater or the like enters the tubular body due to the air in the tubular body becoming condensed water. It accumulates. When rainwater, etc. accumulates in the column in this way, the metal pipe is corroded by the rainwater, etc., and in cold regions, rainwater, etc. in the pipe freezes in the winter, and the volume expands. When ruptured, rainwater enters from this portion and the corrosion of the pipe body further proceeds. As a result, the column becomes brittle and easily broken, so that the function of the handrail cannot be performed, and there is a possibility that it sometimes leads to a serious accident involving human life.
For this reason, it is necessary to take some measures for safety measures for the struts that have become fragile, but the measures so far are generally (1) a method of replacing the whole with a new handrail or (2) measures against rainwater in advance. The method of installing using the handrail support column which has been given, and (3) the method of repairing the defective part of the support column are employed. (For example, refer to Patent Documents 1 and 2.)

  Of the above methods (1) to (3), the method of replacing the whole of the above (1) with a new handrail is a method that has been adopted as a service life has expired and the life has been exhausted. This is the mainstream of measures.

Moreover, the following patent document 1 is divided into said (2), FIG. 6 is sectional drawing which shows the handrail support | pillar described in this patent document.
This handrail column 100 is a handrail column in which an iron reinforcing material 102 is disposed inside an aluminum hollow column 101, and an end plate 103 that closes the lower end of the aluminum hollow column 101 is provided below the iron reinforcing material 102 to provide an aluminum hollow column. A foam material 104 is filled between 101 and the iron reinforcing material 102.

Further, the following Patent Document 2 is divided into the above (3), and FIG. 7 is a cross-sectional view for explaining a defect repairing method described in this Patent Document.
In this repair method, an elongated bar-like reinforcing material 112 is disposed in the column base part extending vertically above and below the defective part 111 of the steel pipe column base part 110, and the curable composition 115 is filled and cured to repair the defective part 111. A long rod-shaped reinforcing material 112 and insertion ports 113 and 114 for the curable composition 115 are opened at a position higher than the defect site 111 of the column base, and a long bar shape is formed from these insertion ports 113 and 114. In this method, the reinforcing material 112 and the curable composition 115 are inserted, and the curable composition 115 is cured and repaired in a state where the long bar-shaped reinforcing material 112 is included.

Japanese Utility Model Laid-Open No. 5-52063 (Figure 1, Claim for Utility Model Registration) JP-A-7-292999 (FIG. 5, paragraphs [0014] to [0020])

  However, the method of exchanging the whole of the above (1) with a new handrail is a large-scale work on the veranda part, which requires a long period of time and increases the construction cost. Also, since the entire work is replaced, even a column that requires repair only partially is left unattended until the entire repair time, which is not desirable for safety.

  Moreover, the method of installing using the handrail support | pillar which applied the rainwater countermeasure of said (2), for example, the handrail support | pillar described in the following patent document 1, the aluminum hollow support | pillar and the iron reinforcement material in the inside are an end. By fixing the lower end of the hollow column with a plate and then injecting a foam material between the two and filling the gap with this foam material, the plate can be fixed without rattling. Moreover, since the outer periphery of the iron reinforcing material is covered with the foamed material and does not come into contact with moisture or air, corrosion can be prevented. However, when this handrail support is replaced with a new handrail as in the above method (1) or newly installed, rainwater countermeasures are taken, but it is effective. It cannot be a countermeasure.

  Furthermore, the method of repairing the defect portion of the column (3) described above, for example, the repair method described in Patent Document 2 below, is a countermeasure in a deficient state, requiring large-scale work, and prevention before loss. It cannot be a countermeasure.

The present inventors have been involved in repairing apartment houses such as apartments and condominiums for many years. Recently, as shown in FIG. 5, the coating film 19 made of paint or the like applied to the concrete 18 near the handrail is rusted with a metal material. I have noticed that the appearance of the dirt is damaged or that the coating film 19 has been peeled off, and have been searching for the cause. As a result, in normal was to not be assumed, after built, and accumulated rainwater X ₀ to 10 years-old handrail in struts, the rainwater X ₀ penetrates through the concrete wall 18, X ₁ It was found out that it oozed out and stained and the paint was peeled off. At that time, many of the handrails, which were not rusted from the outside and were difficult to detect damage, had water accumulated in the columns. This is considered to be caused by accumulation of rainwater and dew condensation water over a long period of time due to dew condensation due to the joint portion of the members constituting the handrail or the outside air temperature difference.

  In addition, when the water accumulated inside the handrail oozes out to the concrete surface, the calcareous material that maintains the strength of the concrete will be washed away, and the reinforcing bars will rust because the reinforcing bars in the concrete will rust, In the worst case, it was found that there was a danger that the concrete that could not withstand the expansion of the rebar would explode and the concrete near the handrail would fall off. Therefore, the present inventors have conceived that handrails that have been exposed to wind and rain for many years need regular maintenance and repair, and have completed the present invention.

  Accordingly, an object of the present invention is to provide a repair method of a handrail strut that prevents the corrosion of the strut, and the contamination and dropout of the strut mounting wall associated therewith.

In order to achieve the object of the present invention, the column repair method of the invention according to claim 1 of the present application comprises the following steps.
(1) A step of drilling a hole with a predetermined diameter at the base of a hollow support column embedded and fixed in concrete .
(2) A step of extracting water accumulated in the hollow strut located below the hole from the hole by a suction pump .
(3) A process of injecting a curable resin from the hole and filling the hollow strut after the water is extracted.

  The invention according to claim 2 completes the work in the repair method of the support column according to claim 1 in a state in which the hole provided in the support column is opened or the hole is closed after the step (3). It is characterized by.

  The invention according to claim 3 is the column repair method according to claim 1 or 2, wherein the resin is an epoxy resin.

  The invention according to claim 4 is the column repair method according to any one of claims 1 to 3, wherein the column is a handrail column.

According to the first aspect of the invention, the work is extremely simple, the construction period is short, the safety is high, and the cost can be greatly reduced. In addition, since partial repair is possible, unnecessary replacement of the handrail can be avoided and it becomes economical.
That is, when storage of rainwater or the like is discovered by maintenance inspection, rainwater or the like is extracted from the inside of the support in a timely manner, so that a failure caused by the stored rainwater or the like can be prevented or prevented.

  According to the second aspect of the present invention, the hole provided in the support column may be opened as it is, or may be closed, and rain water that has entered the support column after repairing by making the hole open. Etc. will flow out to the outside of the column, and rainwater will not accumulate in the column after repair, and if the hole is closed, the column body, the concrete with the column attached and its coating will not be damaged. The membrane can be repaired.

  According to the invention described in claim 3, the epoxy resin is easy to obtain, easy to handle, and repair work is simplified. In addition, the effect of repairing the cracked portion of the concrete and good expelling of water in the column are achieved. It can be carried out.

According to the fourth aspect of the present invention, by removing the rainwater or the like before leaching from the concrete, it is possible to eliminate contamination due to rust of the coating film on the concrete surface and to prevent the coating film from peeling off. Further, it is possible to prevent the corrosion of the metal pipe body or the rupture of the pipe body due to the expansion of the rainwater or the like frozen in a cold region.
Furthermore, by injecting resin into the column from which rainwater has been removed, even if rainwater or the like enters the column again after repair, it will not leak into the concrete and prevent the concrete part from falling off. become able to.

  Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings. However, the embodiment described below exemplifies a repair method of the handrail support for embodying the technical idea of the present invention, and is not intended to limit the present invention to patents. Other embodiments within the scope of the claims are equally applicable.

  FIG. 1 is a cross-sectional view of a handrail post that is a target of the post repair method of the present invention, and FIGS. 2 to 4 are cross-sectional views illustrating the procedure of the repair method using the handrail post of FIG.

  The handrail strut 10 to be subjected to this strut repairing method uses the handrail strut of the prior art shown in FIG. Therefore, since the structure of the handrail support has already been described, the redundant description is avoided and the repair method will be described below. In the handrail support column shown in FIGS. 1 to 4, the iron reinforcing material 15 is fixed to the anchor plate 14 by welding or the like 17 with the attachment plate 16 applied in advance.

  In the hollow column 11 of the handrail column 10 that has been exposed to wind and rain for many years, as shown in FIG. 1, due to the corroded portion of the handrail, the coupling part of each member, and further condensation due to the temperature difference of the outside air Rainwater and dew condensation water (hereinafter referred to as rainwater) accumulates and accumulates. In many cases, it is difficult to find out whether rainwater or the like is accumulated in the column. However, as described above, when the coating film 19 of the concrete 18 in the vicinity where the handrail is installed is soiled by rust of a metal material, or the coating film 19 is peeled off, the rain water is generally contained in the column 11. In many cases, this is caused by the rainwater or the like penetrating the concrete and seeping out to the outside. Therefore, the maintenance status of rainwater etc. is monitored by regular maintenance and inspections, and the following repairs are performed.

Therefore, in order to remove the rainwater, etc. X _0, as shown in FIG. 2, first, the base portion of the hollow struts 11 using a tool such as a drill, bore 11 0 having a predetermined _size, eg, diameter 9mm Drill a hole. The root portion is preferably a location close to the top of the iron reinforcing material 15. Usually, the height of the iron reinforcing material is 12 to 13 cm. Some of them are high and 30 cm or more, but in the case of such a high reinforcing material 15, a hole penetrating the reinforcing material is provided. Incidentally, the holes 11 ₀ to eliminate the risk of later work in and work, it is advisable to perform chamfering using pre鑢等.

In this drilling operation, the rainwater into the hollow strut 11 to the upper than the drilling position of the hollow strut 11 is accumulated, as soon as a hole 11 ₀ hollow strut 11, rainwater and the like from the hole 11 ₀ momentum Because it often erupts, this part of the rainwater is naturally released from the hole even if left unattended.
After the spontaneous emission is finished, the holes 11 ₀ to insert the hose 21 of the suction pump 20, withdrawn rainwater and the like remaining in the hollow strut 11. Pump 20 used at this time, it is possible to use a known pump, the suction hose 21 can be easily inserted into the hole 11 in _0, using a pump of easily accessible form to the lower end of the hollow struts 11 It is preferable.

A hollow post 11 After removing rainwater, etc. in the suction pump 20, using an infusion pump 30 of the resin 31 is injected into the hollow strut 11 through the hole 11 _0, void rainwater iron reinforcements 15 and the strut 11 is accumulated together eliminate, rainwater coming enters into the strut 11 after the repair is to flow out to the outside from this hole 11 _0, to fill to the bottom marginal holes 11 _0. The resin to be injected is preferably a repaired epoxy resin, even if it is a room temperature curable type resin such as an epoxy resin, thermosetting resins such as vinyl ester resins and unsaturated polyester resins, polyethylene, polypropylene A thermoplastic resin such as

When the epoxy resin is injected in this way, since the epoxy resin is liquid, the epoxy resin soaks into the cracked portion formed by washing away the calcareous material of the concrete 18 when rainwater or the like exudes the concrete 18, In addition to repairing cracks, rainwater, etc. that has not been completely sucked by the suction pump 20 and has accumulated in the lower part of the iron reinforcement 15 is lifted onto the epoxy resin because the specific gravity of the epoxy resin is larger than that of water. to flow out from the hole 11 _0.

Struts 11 which injected resin becomes the rainwater that has entered into the strut 11 after the repair if in a state of opening the hole 11 ₀ provided during repair to discharge through the hole 11 ₀ after repair again There is no need for repair, and there is no risk of rainwater or the like infiltrating into the concrete 18 due to the bottom of the support 11 being raised by the epoxy resin. However, prevention may be to block the holes 11 ₀ from the viewpoint of appearance, since rainwater or the like by an epoxy resin even this case does not soak into the concrete 18, fall off or the concrete 18, the peeling of the coating film 19 Will be able to.

This strut repair method is extremely easy to work, has a short construction period, is highly safe, and can greatly reduce costs. Furthermore, since partial repair is possible, unnecessary replacement of the handrail can be avoided and it becomes economical.
That is, when storage of rainwater or the like is discovered by maintenance inspection, rainwater or the like is extracted from the inside of the support in a timely manner, so that a failure caused by the stored rainwater or the like can be prevented or prevented. For example, when rainwater or the like is extracted before exuding from the concrete, contamination due to rust or the like of the coating film on the concrete surface can be eliminated, and the coating film can be prevented from peeling off. Further, it is possible to prevent the corrosion of the metal pipe body or the rupture of the pipe body due to the expansion of the rainwater or the like frozen in a cold region.

In addition, by injecting resin into the column from which rainwater has been removed, water that has entered the column after the repair will always be discharged out of the cylinder from the hole. it can.
This pillar repair method is applicable not only to handrail pillars, but also to outdoor fences, amusement facilities, etc., where fences made of pipes are installed to prevent danger. Further, the handrail and the fence can be applied not only with a metal but also with a resin support.

Cross-sectional view of a handrail column subject to the column repair method of the present invention Sectional drawing explaining the procedure of repair method using the handrail support | pillar of FIG. Sectional drawing explaining the procedure of repair method using the handrail support | pillar of FIG. Sectional drawing explaining the procedure of repair method using the handrail support | pillar of FIG. Sectional view showing a known handrail post Sectional drawing which shows the handrail support | pillar described in patent document 1 Sectional drawing explaining the repair method of the defect | deletion part described in patent document 2

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Handrail support | pillar 11 Metal hollow support | pillar 11 ₀ hole 12 Lower chord material 13 Caps 14 Anchor plate 15 Iron reinforcement material 16 Substrate 17 Welding part 18 Concrete 19 Paint film 20 Suction pump 30 Injection pump 31 Resin

Claims (4)

Repair method of strut which consists of the following processes,
(1) A step of drilling a hole with a predetermined diameter at the base of a hollow support column embedded and fixed in concrete .
(2) A step of extracting water accumulated in the hollow strut located below the hole from the hole by a suction pump .
(3) A process of injecting a curable resin from the hole and filling the hollow strut after the water is extracted.   The method of repairing a column according to claim 1, wherein after the step (3), the work is completed in a state where a hole provided in the column is opened or a state where the hole is blocked.   3. The support repair method according to claim 1, wherein the curable resin is an epoxy resin.   The said column is a handrail column, The repair method of the column in any one of Claims 1-3 characterized by the above-mentioned.

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