JP2004150134A - Repair method and construction method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a repair technology for a cylinder such as a handrail. <P>SOLUTION: A repair method for a structure wherein a lower part of the cylinder is embedded in a cement body is equipped with a drain-hole forming process for forming a drain hole which communicates with a hollow part existing inside the cement body in such a manner as to correspond to the lower end of the cylinder, a filler-injecting-hole forming process for forming a filler injecting hole in the cylinder, and a filler injecting/curing process for injecting a filler into the cylinder from the filler injecting hole so as to cure it, after water existing inside is drained from the drain hole formed in the drain-hole forming process. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a method for repairing and constructing an upright pipe body constituting a handrail of a veranda, for example.
[0002]
[Problems to be solved by the invention]
For example, a handrail provided on a veranda of an apartment or the like is made of an iron or aluminum pipe. This handrail is usually composed of a horizontal pipe and a vertical pipe supporting the horizontal pipe. In the case of an aluminum pipe, at least the lower part of the vertical pipe 21 has a double structure having an iron pipe inside the aluminum pipe, and the lower end of the vertical pipe 21 is formed of an iron pipe. As shown in FIG. 6, the lower end of the vertical pipe 21 is fixed to an anchor 22 provided on a concrete structure such as a balcony by welding or the like using a metal fitting for welding. A base portion 23 is provided in which rear mortar or the like is packed with a trowel or the like to cover the lower end of the vertical pipe 21 and make up.
[0003]
By the way, in the handrail constructed as described above, cracks have occurred in the base portion 23 after a long period of time, and there is a problem in durability of the handrail. Also, there is an aesthetic problem due to the generation of rust juice and efflorescence.
[0004]
Conventionally, this type of crack is thought to be caused by the impregnation of rainwater from a gap between the vertical pipe 21 and the foundation 23, and the impregnated water. The cracks are formed by sealing the cracked portion of the base portion around the vertical pipe 21 with a sealing material, or repainting the mortar of the damaged portion.
[0005]
However, according to the study of the present inventor, it has been found that repairs such as sealing with a sealing material and repair of mortar do not lead to a fundamental solution and are insufficient.
[0006]
Therefore, a first problem to be solved by the present invention is to provide a repair technique for a cylindrical body such as a handrail.
[0007]
A second problem to be solved by the present invention is to provide a construction technique in which a cylindrical body such as a handrail has high durability.
[0008]
[Means for Solving the Problems]
While we have been studying cracks in the foundation, we have found that cracks are not actually caused by water impregnated through the gap between the vertical pipe and the foundation. In other words, as shown in FIG. 6, in addition to the fact that the inside of the vertical pipe 21 is originally hollow due to the poor fluidity and poor construction of the mortar, The rainwater gradually enters through a hole (gap) above the vertical pipe 21 with the passage of time and accumulates in the hollow portion 24 including the gap inside the base portion 23. In some cases, rainwater has accumulated up to the inside of the vertical pipe 21. Under such conditions, cracks occur due to rust of iron parts such as the iron pipes and anchors 22 at the lower end of the vertical pipe 21. Further, in cold regions, freezing and thawing in winter are repeated to cause cracks. We have decided to expand.
[0009]
Therefore, the cracks in the base 23 cannot be fundamentally solved without removing the water accumulated in the cavity inside the base 23. Conversely, it means that water remaining in the cavity inside the base portion 23 should be removed and the supply of water into the cavity portion of the base portion 23 should be cut off.
[0010]
The present invention has been achieved based on such findings.
[0011]
That is, the first problem is a method for repairing a structure in which a lower end of a cylindrical body is embedded in a cement body,
A drainage hole forming step of forming a drainage hole leading to a cavity present inside the cement body corresponding to the lower end of the cylindrical body,
A filling material injecting and curing step of injecting and curing a filler into the cylinder after water present inside is removed from the holes formed in the drainage hole forming step. It is solved by the repair method of the thing.
[0012]
In particular, a method of repairing a structure in which the lower end of the cylindrical body is embedded in a cement body,
A drainage hole forming step of forming a drainage hole leading to a cavity present inside the cement body corresponding to the lower end of the cylindrical body,
A filler injection hole forming step of forming a filler injection hole in the cylindrical body,
A filling material injecting / curing step of injecting and curing a filler into the cylinder through the filler injecting hole after the water present inside is drained from the hole formed in the water draining hole forming step. The problem is solved by a method of repairing a structure characterized by the following.
[0013]
That is, as it has been found for the first time by the study of the inventor of the present application, a cylinder or the like constituting a handrail is arranged, and thereafter, the mortar is packed around the lower end of the cylinder with a trowel or the like, and the base part is formed. It is composed, and originally, the mortar is not pushed with a trowel or the like so that a cavity is formed inside the base part, but there is also poor fluidity and construction of the mortar, In fact, a cavity was formed inside the foundation. Then, water was accumulated in the hollow portion, and the iron portion and the anchor of the cylindrical body were rusted, and the base portion was cracked.
[0014]
Therefore, even if the cracked part of the base part of the peripheral part of the cylindrical body is sealed with a sealing material, the rust of the cylindrical body is not eliminated as long as water is accumulated inside the hollow part, and the mortar is made. The problem of cracks in the foundation is not solved.
[0015]
Therefore, it is necessary to drain the water accumulated in the cavity.
[0016]
However, it is not true that draining is enough. Because, as long as there is a cavity, water is again accumulated.
[0017]
Therefore, it is necessary to drain the water inside the cavity and close the cavity. Then, in this manner, rust of the cylindrical body and cracking of the base portion do not occur thereafter.
[0018]
Therefore, as described above, the above problem can be solved by making a hole and draining water remaining in the cavity, and filling the cylinder with a filler to fill the cavity.
[0019]
Moreover, if a filler hole is formed in the cylinder and the filler is injected into the cylinder through the filler hole, water that accumulates in the cylinder after this repair work is discharged from the filler hole. Since water is not supplied to the iron portions such as the iron pipes and anchors in the base portion, no rust is generated in the iron portions in the base portion and no crack is generated in the base portion. It is more preferable that the filler is injected up to the level of the filler injection hole, since water does not accumulate inside the cylinder and the cylinder does not rust. Further, by injecting the filler, the water in the inside is forcibly discharged from the drainage hole, and the problems of rust of the cylindrical body and cracking of the base portion are further solved.
[0020]
The second object is a method of constructing a structure in which a lower end of a cylindrical body is embedded in a cement body,
A cylinder arrangement step of arranging the cylinder,
After the cylindrical body disposing step, supplying a cement material so as to cover the lower end of the cylindrical body, a base part forming step of curing and forming a base part,
A cavity filling material supplying step of supplying a filling material from a hole formed in a side wall of the cylindrical body so as to fill a cavity existing in the base portion. Is resolved.
[0021]
In other words, the problem of rust on the barrel of the handrail and cracking of the foundation is due to the existence of a cavity that should not have been formed, so even if this cavity is made, fill it. If so, no problems should arise in the first place.
[0022]
Therefore, as described above, by supplying and filling the inside from the hole formed in the side wall of the cylindrical body so as to fill the hollow portion existing inside the base portion, no problem occurs and the durability is high. It will be.
[0023]
In addition, if filler is injected into the cylinder through the hole formed in the side wall of the cylinder, water that has entered from the upper part of the cylinder is discharged from the filler injection hole, and iron pipes and anchors in the base Since no water is supplied to the iron portion such as the above, no rust is generated on the iron portion in the base portion, and no crack occurs in the base portion. It is more preferable that the filler is injected up to the level of the filler injection hole, since water does not accumulate inside the cylinder and the cylinder does not rust.
[0024]
As the filler, a filler using a thermosetting resin as a binder, a filler using a thermoplastic resin as a binder, a filler using cement as a binder, and the like are used. In addition, various additives such as a curing accelerator, a curing retarder, a swelling agent, a foaming agent, a water reducing agent, a polymer for cement, an aggregate, a viscosity modifier, and a rust inhibitor may be added thereto. However, it is preferable to use a cement-based non-shrink mortar in terms of workability, filling property, and integration with the cylinder after the work. In particular, it is preferable to use a cement-based non-shrink mortar containing a rust inhibitor and / or a polymer for cement from the viewpoint of rust prevention effect.
[0025]
BEST MODE FOR CARRYING OUT THE INVENTION
The repair method according to the present invention is a method for repairing a structure in which a lower end of a cylindrical body is embedded in a cement body, and leads to a cavity existing inside the cement body corresponding to the lower end of the cylindrical body. A water draining hole forming step of forming a water draining hole, and a filler that is filled with the filler into the cylinder and hardened after water present inside is drained from the hole formed in the water draining hole forming step. And an injection / curing step. In particular, a method for repairing a structure in which a lower end of a cylindrical body is embedded in a cement body, wherein a drain hole is formed corresponding to the lower end of the cylindrical body and connected to a cavity existing inside the cement body. Water draining hole forming step, a filler filling hole forming step of forming a filler filling hole in the cylindrical body, and after water present inside is drained from the hole formed in the water draining hole forming step. And a filler injecting / curing step of injecting and curing the filler into the cylinder through the filler injecting hole.
[0026]
The construction method according to the present invention is a method for constructing a structure in which the lower end of the cylinder is embedded in a cement body, and a cylinder arrangement step of disposing the cylinder, and after the cylinder arrangement step, A cement material is supplied so as to cover the lower end of the cylindrical body, and a base part forming step of curing and forming a base part is formed on the side wall of the cylindrical body so as to fill a cavity existing inside the base part. And supplying a filler to the inside from the hole.
[0027]
In the present invention, the cement body means an object hardened by hardening of cement, and includes, for example, a hardened body of mortar and a hardened body of concrete.
[0028]
The details will be described below.
1 to 3 are explanatory views showing one embodiment of the repair method of the present invention.
[0029]
First, as shown in FIG. 1, a lower end of a vertical pipe 1 of a base portion 2 on which a metal vertical pipe (post) 1 or the like constituting a handrail is planted, and a hole 3 is formed by a drill or the like. I do. That is, it is expected that repair is necessary because the base part 2 has been cracked because the hollow part 4 is formed inside the base part 2. Form 3 It should be noted that whether or not the hole 3 connected to the cavity 4 is formed is determined by whether or not water has come out of the hole 3 or when a drill or the like when forming the hole 3 suddenly becomes deep and goes into a drill or the like. It can be determined from the fact that the load on the device rapidly decreases.
[0030]
Next, as shown in FIG. 2, a hole 5 is formed in the vertical pipe 1 at a position slightly above the base portion 2. During this operation, water accumulated in the cavity 4 from the hole 3 is naturally drained.
[0031]
Thereafter, a cement-based non-shrink mortar containing a rust inhibitor, a polymer for cement, an expanding material and the like is injected as a grout material from the holes 5. As a result, as shown in FIG. 3, the inside of the hollow portion 4, the inside of the vertical pipe 1 below the position of the hole 5, and the inside of the hole 3 are filled with the grout material and hardened after a predetermined time elapses. , The vertical pipe 1 and the hardened grout body 6 are integrated.
[0032]
As a result, as can be seen from FIG. 3, even if rainwater enters from the upper part of the vertical pipe 1, the water only accumulates on the hardened grout body 6. However, the water remaining on the hardened grout body 6 is drained to the outside through the hole 5, and no water is stored inside.
[0033]
Therefore, after this repair work, damages such as cracking of the base portion 2 and corrosion of the vertical pipe 1 can be greatly improved. Furthermore, the lower part of the vertical pipe 1 is reinforced by the filled hardened grout body 6, and the mechanical strength of the standing structure is also improved.
[0034]
In the above embodiment, the grout material is injected from the hole 5, but the invention is not limited to this. For example, the lid at the upper end opening of the vertical pipe 1 may be removed, and the vertical pipe 1 may be injected. Further, before or after the grout material is injected, it is preferable to add a rust inhibitor to the vertical pipe 1 or the base portion 2 by coating or the like to suppress rusting.
[0035]
FIG. 2 is an explanatory diagram showing an embodiment of the construction method of the present invention.
[0036]
First, as shown in FIG. 4, a handrail construction operation is performed in the same manner as in the related art. That is, a handrail constituting member such as a vertical pipe (post) 1 is disposed, and is fixed to an anchor provided on a concrete structure such as a balcony by welding or the like, and thereafter mortar or the like is packed. A base portion 2 for covering and covering the lower end portion of the vertical pipe 1 is provided. Note that such a process may be the same as a conventional process, and thus details are omitted. And when it is comprised in this way, the hollow part 4 is formed in the base part 2 from the poor fluidity of mortar.
[0037]
Thereafter, if no hole is formed in the side wall of the vertical pipe 1, a hole 5 is formed. This step can be omitted if the vertical pipe 1 in which the hole 5 is formed is used in advance.
[0038]
Then, a cement-based non-shrink mortar containing a rust inhibitor, a polymer for cement, an expanding material and the like is injected as a grout material from the holes 5. As a result, as shown in FIG. 5, the inside of the hollow portion 4 and the inside of the vertical pipe 1 below the position of the hole 5 are filled with the grout material, and after a predetermined time elapses, it hardens, and the base portion 2, the vertical pipe 1 and The cured grout body 6 is integrated.
[0039]
As a result, as can be seen from FIG. 5, even if rainwater enters from the upper part of the vertical pipe 1, water only accumulates on the hardened grout body 6. However, the water remaining on the hardened grout body 6 is drained to the outside through the hole 5, and no water is stored inside.
[0040]
Therefore, damages such as cracks in the base portion 2 and corrosion in the vertical pipe 1 can be greatly improved. Furthermore, the lower part of the vertical pipe 1 is reinforced by the filled hardened grout body 6, and the mechanical strength of the standing structure is also improved.
[0041]
【The invention's effect】
A highly durable structure such as a handrail can be obtained.
[Brief description of the drawings]
FIG. 1 is an explanatory view showing one embodiment of the repair method of the present invention. FIG. 2 is an explanatory view showing one embodiment of the repair method of the present invention. FIG. 3 is an explanatory view showing one embodiment of the repair method of the present invention. FIG. 4 is an explanatory diagram showing an embodiment of the construction method of the present invention. FIG. 5 is an explanatory diagram showing an embodiment of the construction method of the present invention. FIG. 6 is an explanatory diagram of a main part of a conventional handrail. Description]
DESCRIPTION OF SYMBOLS 1 Vertical pipe 2 Base part 3 Drainage hole 4 Cavity part 5 Filler injection hole 6 Hardened grout

Claims (3)

A method for repairing a structure in which a lower end of a cylindrical body is embedded in a cement body,
A drainage hole forming step of forming a drainage hole connected to a cavity existing inside the cement body corresponding to the lower end of the cylindrical body,
A filling material injecting / curing step of injecting and curing a filling material into the cylindrical body after water present inside is drained from the hole formed in the water draining hole forming step. How to repair things. A method for repairing a structure in which a lower end of a cylindrical body is embedded in a cement body,
A drainage hole forming step of forming a drainage hole connected to a cavity existing inside the cement body corresponding to the lower end of the cylindrical body,
A filler injection hole forming step of forming a filler injection hole in the cylindrical body,
A filling material injecting / curing step of injecting and curing a filler into the cylinder through the filler injecting hole after the water existing inside is drained from the hole formed in the water draining hole forming step. A method for repairing a structure, characterized in that: A method for constructing a structure in which a lower end of a cylindrical body is embedded in a cement body,
A cylinder arrangement step of arranging the cylinder,
After the cylindrical body disposing step, a cement material is supplied so as to cover the lower end of the cylindrical body, and a base part forming step of curing and forming a base part,
A cavity filling material supplying step of supplying a filling material to the inside from a hole formed in a side wall of the cylindrical body so as to fill a cavity existing inside the base portion. Method.

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