JP3100350B2 - Correction device and correction method for correcting settlement of building - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure and a correction device for fixing a base which is usually installed on a foundation of a wooden building or the like, and when the settlement of the foundation occurs, the settlement can be corrected. Concerning the construction method.

[0002]

2. Description of the Related Art When the foundation of a building once settles down, the building is distorted, making it difficult to open and close doors and windows, and creating a gap between a pillar and a wall.

Conventionally, there have been various construction methods for correcting settlement of an existing building.
Alternatively, for a correction amount up to about 60 mm, there was a method of jacking up a base installed on a foundation. This method will be described with reference to FIGS.

[0004] That is, as shown in FIG. 8, an anchor bolt 5 is provided on an upper surface 3 of a foundation concrete 1, and a male screw portion 7 is provided.
Is planted upward, and is passed through a bolt hole 11 formed in the base 9 as a base. A nut 15 is further screwed to the upper end of the anchor bolt 5 via a washer 13 and the nut 15 is tightened, so that the base 9 is fixed on the foundation concrete 1.

If subsidence occurs in this state, first, as shown in FIG. 9, the nut 15 and the washer 13 are removed so that the base 9 can be moved up and down. Then, a part 17 of the anchor bolt having a required length is added to the upper end of the anchor bolt 5 by welding 19.

Next, a gap 21 is formed by removing the foundation concrete 1 at a portion in contact with the base 9 near the anchor bolt 5. Then, as shown in FIG.
A nail 25 with a nail is fixed to the shoulder 23 of the
Into the gap 21. Then jack up.

[0007] Generally, the jack-up extends to a large number of places on the entire portion of the foundation 9 of the building to be corrected. Therefore, many jacks 25 with claws are used. Thereafter, a spacer 27 is attached between the foundation concrete 1 and the base 9, and is filled and fixed with a mortar 29 or the like (FIGS. 11 and 12).

[0008]

However, according to the prior art described above, welding for adding a part 17 of the anchor bolt, and a large number of base concrete 1 to be removed without damaging the base 9 must be performed. Installation of the jack 25 with the claw of the stand was required, and the construction was troublesome, so that the construction period was prolonged and the construction cost was likely to increase.

The present invention has been made in order to solve the above problems, and an object of the present invention is to provide an anchor bolt device for subsidence correction capable of shortening the construction period, reducing construction costs, and performing subsidence correction.

[0010]

In order to achieve the above object, an invention according to claim 1 comprises a concave portion formed on a part of a top surface of a foundation of a building, and a male member previously embedded in a bottom surface of the concave portion. An anchor bolt having a threaded portion projecting upward, a lower nut screwed into the anchor bolt, and a correction tool for receiving a lower surface of the base, having a bolt hole formed above the lower nut and through which the anchor bolt penetrates, A base which is received by the correction tool and has a bolt hole formed therein through which an anchor bolt is formed and which is installed on the upper surface of a foundation; And an upper nut located above the base and screwed to the anchor bolt.

According to a second aspect of the present invention, there is provided the correcting device according to the first aspect, wherein (a) the upper nut is rotated around the axis of the anchor bolt to be raised, and (b) the jack of the correcting tool is jacked by the jack. Push the lower part of the receiving part upward, push up the base, (c) Insert a tool such as a wrench from the recess, rotate the lower nut and raise it to support the correction tool,
(d) This is a correction method for correcting settlement, which comprises the steps (a) to (d) of filling and fixing mortar or the like between the base and the foundation.

[0012]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, one embodiment of the present invention will be described.
This will be described with reference to FIGS. As shown in FIG. 2, a correction device 31 that corrects settlement of a building according to this embodiment.
Are an anchor bolt 33, a lower nut 35 screwed to the anchor bolt 33, and a correction tool 37 located above the lower nut 35 and through which the anchor bolt 33 passes.
And a washer 39 located above the corrector 37 and penetrating the anchor bolt 33, and an anchor bolt 3 above the washer 39.
3 and an upper nut 41 screwed into the upper nut 41.

As shown in FIG. 1, the correction tool 37 has a long rectangular plate shape as a whole, and vertical plates 43 and 45 are erected so as to cross in the width direction at the end and the center of the upper surface. . A portion sandwiched between the vertical plates 43 and 45 is a base receiving portion 47 that receives the base 9. The vertical plates 43 and 45 serve as supports for supporting the side surface of the base 9. A bolt hole 49 through which the anchor bolt 33 passes is formed in the center of the base receiving portion 47.

The portion other than the base receiving portion 47 of the correction tool is a jack receiving portion 51 for receiving a jack. The jack receiving portion 51 is provided integrally with the base receiving portion 47,
It protrudes to the side of the base and acts to receive the power of the jack and transmit it to the base. The jack receiving portion 51 includes the vertical plate 45.
The reinforcing plate 53 is erected perpendicularly to the vertical plate 45 on the same surface as that on which the is provided, so that it is not deformed by the jack force.

(Apparatus installation procedure) Next, a work procedure for mounting the apparatus 31 according to this embodiment in advance when building a building will be described with reference to FIG. 2 and FIG. .

First, a concave portion 55 is formed in the upper surface 3 of the foundation concrete 1 in advance.
Is embedded. The male screw part of the anchor bolt 33 is
It should be long enough to protrude upward from the bottom of the recess 55. The lower nut 35 is screwed into the anchor bolt 33 and the correction tool 37 is penetrated. The lower nut 35 is sufficiently lowered to be positioned in the recess 55.

Then, the foundation 9 is placed on the foundation concrete 1.
When installing the anchor bolts 33, the anchor bolts 33 are passed through the bolt holes 11 formed in advance in the base 9 in the vertical direction.
Then, the side surfaces of the base 9 are fixed to the vertical plates 43 and 45 of the corrector 37.
To support.

Further, the washer 39 is passed through the anchor bolt 33, and the upper nut 41 is screwed. Upper nut 4
The base 9 is firmly fixed to the foundation concrete 1 by the correction tool 37 by the nut 1 and the lower nut 35.

(Sinking Correction Procedure) If the foundation concrete 1 and the base 9 sink due to land subsidence or the like and the building is distorted, the settlement is corrected by the following operation procedure.

First, as shown in FIG. 4, the upper nut 41 is rotated about the axis of the anchor bolt 33 and raised by a predetermined correction height H. This height H is set in advance to a necessary dimension by surveying. This upper nut 41
Is the target for settlement correction.

Next, the ground is excavated and a working hole 56 is dug to expose the shoulder 23 of the foundation concrete 1. A jack 57 is placed on the shoulder 23 and a jack head 59
As a result, the lower side of the jack receiving portion 51 of the correction tool 37 is pushed upward, and the base 9 is pushed up.

When the base 9 is pushed up to the target upper nut 41 in this way, a tool such as a wrench is inserted from the concave portion 55, and the lower nut 35 is rotated and raised to support the correction tool 37. After that, the space and the mortar 61 are filled and fixed between the base 9 and the foundation concrete 1. As described above, according to this embodiment, the following effects are obtained. (1) The correction tool 37 has a jack receiving portion 51 protruding,
A concave portion 55 is formed in the upper surface 3 of the base concrete 1 in advance, and a wrench or the like can be inserted into the concave portion 55 to rotate the lower nut 35. Therefore, the gap 21 is formed by removing the base concrete 1 as in the related art. There is no need to work. Thereby, there is no possibility of damaging the base 9 made of wood (Obiki) or the like. (2) By rotating the lower nut 35, the lower nut and the anchor bolt 33 can perform a certain amount of jacking function, so that it is not necessary to prepare a large number of jacks 25 as in the related art. That is, jack 5
7 can be reduced. (3) Conventionally, it was necessary to frequently measure and check whether or not the necessary correction amount was obtained by pushing up the base 9 with the jack 25. In this embodiment, the position of the upper nut 41 is previously measured. What is necessary is just to position it according to the required correction amount. Therefore, only one survey is required.
That is, the position of the upper nut 41 can be set as a correction target. (4) In this embodiment, it can be said that a device 31 similar to the conventional jack 25 is embedded in the foundation concrete 1 in advance. And this jack 2
By embedding the anchor bolts 33 corresponding to No. 5 in the foundation concrete 1 in advance, the appearance can be made the same as that of the ordinary foundation concrete 1. (5) In comparison with the case where the conventional jack 25 is provided by forming a large depression immediately below the base 9 in the portion of the foundation concrete 1 in advance, the anchor bolt 33 as a portion similar to the jack 25 is different from the foundation concrete. 1, the structural strength of the foundation concrete 1 can be maintained. (6) Conventional subsidence correction is performed by a specialized trader because it requires cumbersome work using a large number of jacks 25, but according to this embodiment, it is easily corrected by a normal jack. Since construction work can be performed, settlement can be corrected at ordinary construction shops.

(Other Embodiments) In the above embodiment, two vertical plates 43, 4 are provided at the end and the center of the corrector 37.
5, the vertical plate 43 at the end may be omitted in another embodiment as shown in FIG. In addition, if a sufficiently thick plate material is used, all of the vertical plates 43 and 45 and the reinforcing plate 53 can be omitted. In FIG. 7, the same parts as those in the embodiment (FIG. 1) are denoted by the same reference numerals.

In the above embodiment, the nut 35,
The rotation of 41 is performed using a tool such as a wrench, but in other embodiments, a handle is attached to the nuts 35 and 41 in advance, and the nuts 35 and 41 are easily rotated without using a tool. It is also possible.

In the above embodiment, the concave portion 55 is formed so that the anchor bolt 33 and the nut 35 can be seen from the outside of the foundation concrete 1 (see FIG. 2). However, in other embodiments, the concave portion 55 is formed. It is possible to cover a part of the base concrete 55, that is, a part corresponding to an extension of the side surface of the foundation concrete 1, with a thin mortar so as to make it invisible so as not to be seen from the outside. Then, when actually correcting the settlement, the work can be performed after the mortar is shaved off to expose the concave portion 53.

In particular, in the anchor bolt device 31 for subsidence correction provided on the foundation concrete 1 located on the outer peripheral portion of the building, it is effective to apply the mortar in a blind state to the concave portion 55 from the viewpoint of maintaining an aesthetic appearance. It is.

[0027]

As described above, according to the present invention, a jack which projects laterally is formed by forming a concave portion in advance on a part of the upper surface of the foundation and providing the correcting device according to the present invention in the concave portion. By using the catch, it is not necessary to insert the claw of the jack with a claw between the base and the foundation as in the conventional case, and the lower nut can be rotated in this concave portion, so that the foundation can be removed as in the conventional case. No need. Therefore, there is no danger of damaging the base.

Further, since the anchor bolt and the nut also function as a jack, so to speak, the number of jacks used can be reduced. From these, the construction period can be shortened, and the construction cost can be reduced.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a main part of a correction device for correcting settlement of a building according to an embodiment of the present invention.

FIG. 2 is a side view showing a foundation portion of a building to which the correction device of FIG. 1 is attached.

FIG. 3 is a sectional view of FIG. 2;

FIG. 4 is a side view showing a state in which a jack is set to correct settlement in FIG. 2;

FIG. 5 is a side view showing a state where a jack is raised and a base is pushed up in FIG. 4;

FIG. 6 is a side view showing a state where the correction is completed in FIG. 5;

FIG. 7 is a diagram corresponding to FIG. 1 in another embodiment.

FIG. 8 is a sectional view of a foundation showing a conventional example.

FIG. 9 is a side view of FIG.

FIG. 10 is a view showing a state where the base of FIG. 8 is pushed up by a jack.

11 is a side view showing a state where the space between the base and the foundation in FIG. 10 is filled with mortar or the like.

FIG. 12 is a sectional view of FIG. 11;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Foundation concrete 9 Base (Obiki) 33 Anchor bolt 35 Lower nut 37 Correction tool 39 Washer 41 Upper nut 43, 45 Vertical plate 47 Base receiving part 49 Bolt hole 51 Jack receiving part 53 Reinforcement plate 55 Depression 57 Jack 61 Mortar

Claims (2)

(57) [Claims] 1. A recess formed in a part of an upper surface of a foundation of a building, an anchor bolt previously embedded in a bottom surface of the recess and having a male screw portion projecting upward, and a lower portion screwed to the anchor bolt. A nut and a fixing tool positioned above the lower nut and formed with a bolt hole through which the anchor bolt passes and receiving the lower surface of the base, and a bolt hole received by the fixing tool and through which the anchor bolt passes are formed on the upper surface of the foundation. A base to be installed, a jack receiving part integrally provided with the correction tool and projecting sideways and transmitting the force of the jack to the base, and an upper nut located above the base and screwed to the anchor bolt. A correction device for correcting settlement of a building, the correction device comprising: 2. The method according to claim 1, wherein (a)
Rotate the upper nut around the axis of the anchor bolt to raise it. (B) Push up the lower side of the jack receiving part of the correction tool with a jack, push up the base, and (c) Remove a tool such as a wrench from the recess. (D) A building having the above-mentioned steps (a) to (d) in which the lower nut is rotated by rotating the lower nut to raise and support the correction tool, and (d) the mortar is filled and fixed between the base and the foundation. Correction method to correct settlement of foundation of building.