JPH08260501A - Setting method of shearing type foundation bolt - Google Patents

Abstract

PURPOSE: To extensively shorten a construction period, to restrict a construction space small and to set a shearing type foundation bolt at low cost. CONSTITUTION: A side hole 4 for insertion of an anchor plate 6 is drilled from a side surface of an existing foundation concrete 1, and a plurality of vertical holes 5 for insertion of anchor bolts reaching the side hole 4 from an upper part of the existing foundation concrete 1 are drilled. Thereafter, the anchor bolts 8 are inserted into the vertical holes 5 from the upper part of the foundation concrete 1, the anchor bolts 8 and the anchor plate 6 are fixed and concrete is injected into the vertical holes 5 thereafter.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a construction method for installing a shear type foundation bolt in an existing foundation.

[0002]

2. Description of the Related Art When a shear type foundation bolt is installed in an existing foundation concrete, the conventional construction method is, for example, as shown in FIG.
As shown in FIG. 1, first, a recess 11 is formed in the existing foundation concrete 1 using a heavy machine (not shown), and then the anchor plate 6 and the anchor bolt 8 are previously fixed in the recess (space) 11 ( Anchor frame) 10
After the installation, the concrete is generally cast to fix the frame 10 to the existing foundation concrete 1 integrally. In the figure, 2 is the ground.

[0003]

The conventional method has the following problems. (1) In order to install the shear type foundation bolt, it is necessary to remove the existing foundation concrete 1 and then restore it again as described above, which requires time for construction. (2) A large construction space is required because heavy equipment is used to remove the existing foundation concrete 1. (3) It is necessary to process and install the frame 10 for fixing the anchor plate 6 and the anchor bolt 8 in advance, which increases the material processing cost. (4) Since the frame 10 for fixing the anchor plate 6 and the anchor bolt 8 has been processed, it needs to be transported to the site, which increases the transportation cost.

The present invention is to solve the above-mentioned problems.
It is an object of the present invention to provide a construction method in which the construction period can be greatly shortened, a construction space can be small, and a shear foundation bolt can be installed inexpensively.

[0005]

In order to solve the above-mentioned problems, in the shear foundation bolt installation method of the present invention, a lateral hole 4 for inserting an anchor plate 6 is formed from a side surface of an existing foundation concrete 1, and A plurality of vertical holes 5 for inserting anchor bolts that reach the horizontal hole 4 from the upper part of the existing foundation concrete 1 are drilled, and then the anchor plate 6 is inserted into the lateral hole 4 on the side surface of the existing foundation concrete 1 and then the existing foundation An anchor bolt 8 is inserted into the vertical hole 5 from above the concrete 1, the anchor bolt 8 and the anchor plate 6 are fixed, and then concrete is poured into the vertical hole 5.

[0006]

According to the present invention, the anchor plate 6 to be inserted into the horizontal hole 4 and the vertical hole 5 drilled in the existing foundation concrete 1.
By connecting the anchor bolt 8 in the existing foundation concrete 1 and injecting the concrete into the vertical hole 5, the shear type foundation bolt can be installed in the existing foundation concrete 1, and the conventional concrete for burying the frame 10 can be installed. The removal is minimized and the frame 10 need not be transported.

[0007]

Embodiments of the present invention will now be described with reference to the drawings. FIG. 1 shows an existing foundation in which the upper surface and the side surface of the existing foundation concrete 1 are not covered with the ground 2. In this construction method, first, a core is bored on the upper surface and the side surface of the existing foundation concrete 1 by using the concrete cutter 3. In that case, on the side surface of the existing foundation concrete 1, as shown in FIG. 2, a horizontal lateral hole 4 having a size into which the anchor plate 6 can be inserted is provided by boring cores continuously.

On the other hand, from the upper surface of the existing foundation concrete 1, a vertical vertical hole 5 having a size into which the anchor bolt 8 can be inserted is provided along the vertical direction in the ground 2 until the horizontal hole 4 is reached. The vertical holes 5 are provided as many as necessary to build the foundation. Next, as shown in FIG. 3, the anchor plate 6
Is inserted into the lateral hole 4 and installed. This anchor plate 6
Is provided with an engagement hole 7 for fixing the anchor bolt 8. The engagement hole 7 is provided at a portion located immediately below the vertical hole 5 when the anchor plate 6 is inserted into the lateral hole 4.

Then, as shown in FIG. 4, after inserting the anchor plate 6 into the horizontal hole 4, the anchor bolt 8 is inserted into the vertical hole 5. A locking stopper 9 is provided at a tip portion of the anchor bolt 8, and the anchor bolt 8 is inserted until the locking stopper 9 penetrates the engaging hole 7 of the anchor plate 6, and then the anchor bolt 8 is inserted. The anchor bolt 8 is rotated and fixed to the anchor plate 6. At this time, as shown in FIG. 5, the anchor plate 6 is supported by the raised portion 12 of the lateral hole 4, and the void 13 is formed below the anchor plate 6.
The locking stopper 9 can be smoothly moved to the lower side through the engagement hole 7 via the engaging hole 7. Next, a mold (not shown) for closing the front surface of the horizontal hole 4 is arranged, and finally, concrete is poured into the vertical hole 5 to fill the spaces of the holes 4 and 5 with the anchor plate. 6 and anchor bolt 8 to the existing foundation concrete 1
Fixed to. Further, the structures of the locking stopper 9 and the engaging hole 7 are not limited to those shown in the drawings, and a screwing type or other suitable connecting means may be used.

[0010]

As described above, according to the installation method of the shear type foundation bolt of the present invention, the following various effects can be obtained. (1) By core boring, it is possible to remove the existing foundation concrete 1 and to minimize the restoration range, thereby significantly shortening the construction period. (2) Since a heavy machine is not required to remove the existing foundation concrete 1, a small construction space is sufficient. (3) Since the frame for fixing the anchor plate and the anchor bolt is unnecessary, the construction cost can be greatly reduced and the cost can be reduced.

[Brief description of drawings]

FIG. 1 is a diagram showing a first construction step for carrying out the shearing foundation bolt installation method of the present invention.

FIG. 2 is a diagram showing a second construction step of the same.

FIG. 3 is a diagram showing a third construction step of the same.

FIG. 4 is a diagram showing a fourth construction step of the same.

FIG. 5 is a sectional view of FIG. 4;

FIG. 6 is a diagram showing a conventional method.

[Explanation of symbols]

 1 Existing Foundation Concrete 2 Ground 3 Concrete Cutter 4 Horizontal Hole 5 Vertical Hole 6 Anchor Plate 7 Engagement Hole 8 Anchor Bolt 9 Locking Stopper 10 Anchor Frame 11 Recess 12 Raised Part 13 Void

Claims (1)

[Claims] 1. A horizontal hole 4 for inserting an anchor plate 6 is bored from a side surface of an existing foundation concrete 1, and a plurality of vertical holes 5 for inserting an anchor bolt reaching from the upper portion of the existing foundation concrete 1 to the horizontal hole 4 are bored. ,next,
After inserting the anchor plate 6 into the horizontal hole 4 on the side surface of the existing foundation concrete 1, an anchor bolt 8 is inserted into the vertical hole 5 from the upper portion of the existing foundation concrete 1 to fix the anchor bolt 8 and the anchor plate 6. Then, after that, concrete is poured into the vertical holes 5, and a method for installing a shear type foundation bolt is characterized.