JP2008184886A - Concrete foundation reinforcing method of wooden house - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a foundation reinforcing method superior in workability, by surely increasing strength in an existing foundation itself to which stress from a sill is directly transmitted, when reinforcing a concrete foundation part of an existing wooden house. <P>SOLUTION: Surface mortar on one side of a foundation 12 is chipped off, and a notch of the 1 to 2 cm corner is formed in a vertical 5 to 10 cm position of the concrete foundation 12 by using a sander. An epoxy adhesive is applied to its notch port, and an aramid fiber rod 14 is inserted. When necessary, an aramid fiber sheet 19 is stuck to a surface by using the epoxy adhesive, and a concrete surface is finished with mortar. This is applied over the whole foundation part periphery of the existing wooden house, and the existing foundation itself can be reinforced thereby with excellent workability. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a foundation reinforcing method for reinforcing a foundation of an existing wooden house.

  The structure of a wooden house is usually built on a concrete foundation and a building is built on it. This wooden house can build a high-strength building with the characteristics of wood and carpentry technology. However, houses built based on the recent Building Standards Law are considered to have no problem because some strength is prescribed, but wooden houses built at a time when the earthquake resistance standard is low have many problems. It has been pointed out. One of them is the earthquake resistance of the house part. Now that there is a concern about the occurrence of a major earthquake, the danger of home collapse due to the lack of wall space has become important. The other issue is the strength of the foundation that supports the house. Currently, there are regulations on the amount of reinforcing bars and concrete strength, but the concrete foundations of wooden houses before they are prescribed are not unified in strength and safety by each building. When most foundations are unreinforced concrete and a large earthquake occurs, there is a risk that the concrete foundation will be destroyed, columns will be pulled out, and the house will collapse. Therefore, the reinforcement of the foundation is the most important for the reinforcement of wooden houses. A conventional method for reinforcing the concrete foundation is a reinforced concrete foundation reinforcement method described in non-patent literature. This construction method is a construction method in which a reinforced concrete cloth foundation is placed outside the existing concrete foundation and integrated with the existing concrete foundation with chemical anchors. Moreover, what reinforces with the steel plate described in patent document 1 is known. This method is a method in which concrete is covered on both sides with an L-shaped steel plate and fixed with bolts and nuts.

Seismic diagnosis and reinforcement method for wooden houses (Japan Building Disaster Prevention Association) JP 2003-293382 A

Problems to be solved by the invention

  Reinforced concrete foundation reinforcement method is a method of joining existing concrete foundations with chemical anchors, so it is considered that there is little transmission of stress directly from the foundation, so it is difficult to obtain sufficient strength. In addition, the method of reinforcing with steel plates described in Japanese Patent Application Laid-Open No. 2003-293382 is a method of coating steel plates on both the inside and outside of the concrete foundation. It is hard to say that it is excellent.

  This invention solves these subjects, and it aims at raising the intensity of the existing concrete foundation to which the stress from a foundation is transmitted directly. Moreover, it aims at making it the thing excellent in workability for one side construction of a concrete foundation.

Means for solving the problem

  The method of reinforcing a wooden house foundation according to claim 1 is to integrate the reinforcing rod and the concrete foundation by embedding an aramid fiber rod outside the concrete foundation and fixing it with an epoxy-based adhesive, and then finishing with a surface mortar. It is characterized by making it. The present invention described in claim 2 is characterized in that, in the method for reinforcing a wooden house according to claim 1, an aramid fiber sheet is covered and the entire concrete foundation is integrated. According to a third aspect of the present invention, in the foundation reinforcement method for a wooden house according to the first and second aspects, the entire circumference of the concrete foundation and the concrete foundation directly under the high-magnification bearing wall around the wooden house are disposed. It is characterized by.

  The method for reinforcing a wooden house foundation according to the first embodiment of the present invention is to fix the reinforcing rod and concrete foundation by embedding an aramid fiber rod on the outside of the concrete foundation and fixing it with an epoxy adhesive, and then finishing with a surface mortar. In order to integrate, the strength of the foundation part after reinforcement can be secured.

  In the second embodiment of the present invention, in the foundation reinforcing method for a wooden house according to the first embodiment, since the aramid fiber sheet is covered and the entire concrete foundation is integrated, higher strength is obtained in the foundation portion after reinforcement. Can be secured.

  According to a third embodiment of the present invention, in the method for reinforcing a wooden house foundation according to the first and second embodiments, the entire circumference of the concrete foundation around the wooden house and the concrete foundation directly under the high-magnification load-bearing wall are arranged. Therefore, the foundation reinforcement which improves the earthquake resistance of the existing wooden house can be performed.

  Embodiments of the present invention will be described below with reference to the drawings.

(Embodiment 1) FIG. 1 is a sectional view showing a foundation portion of a wooden house in which a foundation reinforcing method according to the present invention is implemented. The ground 11 performs ground improvement as necessary. Although it is assumed that the existing concrete foundation 12 is formed in an inverted T shape, this reinforcing method is also used in the case of an I shape. The surface mortar on one side of the concrete foundation 12 is removed, and a 1 to 2 cm square notch is inserted into the top and bottom of the concrete foundation 12 using a sander or the like. An epoxy adhesive is applied to the cut opening and an aramid fiber rod 14 is inserted. In Claim 2, the aramid fiber sheet 19 is affixed on the surface using an epoxy adhesive. Both the first and second aspects are finished with mortar on the outside. High-power wall pillars are reinforced with hole-downs 17 to prevent pulling out. An anchor 15 is used to fix the existing concrete foundation 12.

FIG. 2 is a view showing an example of the reinforcing aramid fiber rod 14. The reinforcing aramid fiber rod 14 has a diameter of 7.5 mm and a length of 2 m. However, 910 modules are basic for conventional wooden houses.
(3)
Therefore, if necessary, the reinforcing aramid fiber rod 14 is cut and adjusted so that the joint of the reinforcing aramid fiber rods 14 is not directly under the column.

FIG. 3 is a perspective view showing a foundation portion of a wooden house subjected to foundation reinforcement. The surface mortar on one side of the concrete foundation 12 is removed, and a 1 to 2 cm square notch is inserted into the top and bottom of the concrete foundation 12 using a sander or the like. An epoxy adhesive is applied to the cut opening, and an aramid fiber rod 14 is inserted. In Claim 2, the aramid fiber sheet 19 is affixed on the surface using an epoxy adhesive. Both the first and second aspects are finished with mortar on the outside.
High-power wall pillars are reinforced with hole-downs 17 to prevent pulling out. Since the aramid fiber sheet 19 is not provided in the first aspect, the reinforcing aramid fiber rod 14 is finished with the surface mortar 13 after being installed.

  FIG. 4 is an elevational view showing a foundation portion of a wooden house that has undergone foundation reinforcement. This represents the arrangement adjustment of the joints that occur when the reinforcing aramid fiber rod 14 is installed. It arrange | positions so that the joint of the reinforcing aramid fiber rod 14 may not come under a pillar. Since the reinforcing aramid fiber rod is easy to cut, it can be easily adjusted.

The invention's effect

  As described above, according to the foundation reinforcing method according to the present invention, it is possible to reinforce the existing concrete foundation itself, which is considered to receive the stress from the foundation most when reinforcing the concrete foundation of the existing wooden house. In addition, since there is no concrete placement, construction can be performed without disassembling the floor assembly, so the construction period can be shortened and inexpensive foundation reinforcement can be achieved.

Sectional drawing which shows the base part of the wooden house which implemented the foundation reinforcement method by this invention The figure which shows an example of the aramid fiber rod for reinforcement used for the foundation reinforcement method by this invention The perspective view of the concrete foundation part of the existing wooden house which shows an example of the construction of the aramid fiber rod for reinforcement and the aramid fiber sheet for reinforcement in the foundation reinforcement method according to the present invention The elevation view of the concrete foundation part of the existing wooden house which shows an example of the construction position of the aramid fiber rod for reinforcement in the foundation reinforcement method by this invention

Explanation of symbols

DESCRIPTION OF SYMBOLS 11 Ground 12 Concrete foundation 13 Surface mortar 14 Reinforcement aramid fiber rod 15 Anchor 16 Bolt 17 Hole down hardware 18 Base 19 Reinforcement aramid fiber sheet

Claims (3)

  A method for reinforcing a foundation of a wooden house, comprising embedding the reinforcing rod and the concrete foundation by embedding an aramid fiber rod on the outside of the concrete foundation and fixing with an epoxy-based adhesive and then finishing with a surface mortar.   The method of reinforcing a foundation for a wooden house according to claim 1, wherein the aramid fiber sheet is coated on the outside of the concrete foundation to integrate the entire concrete foundation.   The said reinforcing rod and reinforcing sheet are arrange | positioned in the concrete foundation in the circumference of a concrete foundation in the circumference | surroundings of a wooden house, and a concrete foundation just under a high-magnification bearing wall. Basic reinforcement method for wooden houses.

Images