JPH07173873A - Fixing structure for foundation bolt - Google Patents

Abstract

PURPOSE:To improve workability by a method wherein an anchor member having an anchor material arranged on the under surface of an anchor plate is embedded in a state that a surface is exposed and a fixing member on the surface of which a foundation bolt is erected is fixed. CONSTITUTION:An anchor member 1 having an anchor material 12 secured on the under surface of a plate-form anchor plate 11 is embedded in foundation concrete 8 in a state that the upper surface of the plate 11 is exposed from a surface. A screwing-in part 22 is formed in an auxiliary plate 21 and joined in a screwed-in state with a foundation bolt 3 according to the position distance of a hole 6 formed in a base plate 5 of a frame steel column leg 4 to be supported. The bolt 3 is joined in a screwed-in state with the screw-in part 22 and locking-welding is applied on the bolt 3 from the under surface side of the plate 21 and fixed. After an auxiliary plate 21 of a fixed member 2 is placed on the upper surface of the plate 11 and positioned, the periphery of the plate 21 is welded and the fixed member 2 is fixed on the anchor member 1. This constitution facilitates positioning and fixing of a foundation bolt and ensures a sufficient joining strength.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fixing structure for foundation bolts for supporting steel column pillars of a building.

[0002]

2. Description of the Related Art Conventionally, when fixing a steel column pillar of a building to a foundation structure, a J-shaped anchor bolt is embedded as a foundation bolt in foundation concrete, and a pillar is attached to a bolt portion protruding above the concrete. Although the base plates such as legs were fixed, it is difficult to position the anchor bolts.To align the anchor bolts with the column pedestals, etc., a part of the basic concrete is crushed to expose the upper part of the anchor bolt, and the upper part of the anchor bolt is fixed. Since it is often bent and corrected, it not only requires work, but also the strength of the anchor bolt may deteriorate.

Therefore, in order to solve such a problem,
After burying the anchor plate with the anchor material welded on the lower surface in the foundation concrete so that the upper surface is exposed,
A method of positioning, welding, and fixing a foundation bolt on the upper surface of the anchor plate has been developed.

However, in the above fixing method, it is necessary to position and weld the foundation bolts one by one on site, which requires a high degree of skill. If a welding failure should occur, the structural bolts may be structurally damaged. However, there is a problem that the bonding strength is significantly reduced.

[0005]

In view of the above-mentioned problems of the prior art, the present invention is capable of easily performing the work of positioning and fixing the foundation bolt, and is also excellent in strength. It is intended to provide a fixing structure for a foundation bolt.

[0006]

[Means for Solving the Problems] An anchor member having an anchor material provided on the lower surface of an anchor plate, and a base bolt is screwed onto a screwing portion of an auxiliary plate and then detent welded to form a base bolt on the upper surface of the auxiliary plate. The standing fixing member was formed separately from each other, and the fixing member was fixed to the anchor member.

[0007]

The anchor member and the fixing member are separately formed in advance, and the anchor member is buried in the basic concrete on site so that the upper surface of the anchor plate is exposed, and then the fixing member is fixed on the upper surface of the anchor plate. The base bolt is fixed in place by positioning and fixing. The base bolt is fixed by being screwed to the screwing portion of the auxiliary plate after rotation prevention welding, and after fixing the column base etc. to the base bolt, the base bolt is mainly supported in the screwing portion, The stress for supporting the column base or the like does not directly act on the detent weld.

[0008]

Embodiments will be described with reference to the drawings.

FIG. 1 shows a fixing structure of a foundation bolt according to an embodiment of the present invention, and FIG. 2 shows a forming process thereof. In the figure, the fixing structure is mainly composed of an anchor member 1 and a fixing member 2.

The anchor member 1 comprises a flat plate-shaped anchor plate 11 and an anchor material 12, 12 made of a deformed steel rod on the lower surface of the anchor plate 11.
Is welded at one end thereof, and the welding 13 is carried out in a factory and transported to a construction site.

The fixing member 2 is the anchor plate 11 described above.
The auxiliary plate 21 is in the form of a smaller flat plate, and the foundation bolts 3 are provided upright on the upper surface of the auxiliary plate 21. The auxiliary plate 21 is formed with a screwing portion 22 which is screwed with the base bolts 3 and 3 in correspondence with the positional intervals of the holes 6 formed in the base plate 5 of the steel column base 4 to be supported. ..

Then, the base bolts 3, 3 are attached to the threaded portion 22.
After the base bolts 3, 3 are erected on the upper surface side of the auxiliary plate 21 by screwing, the base bolts 3, 3 are fixed from the lower surface side of the auxiliary plate 21 by rotation-stop welding 23.

At this time, as shown in FIG. 3, the detent welding 23 is performed along the opening 25 by expanding the lower end opening 25 of the screwing portion 22 or as shown in FIG. The base end 26 of the base bolt 3 may be formed in a conical shape, or the base bolt 3 may be screwed to the middle of the screwing portion 22 as shown in FIG. These works are also done in the factory and are transported to the construction site.

At the construction site, first, the anchor member 1 is embedded in the foundation concrete 8 so that the upper surface of the anchor plate 11 is exposed on the surface. Next, after the auxiliary plate 21 is positioned and placed on the upper surface of the anchor plate 11, the peripheral surface of the auxiliary plate 21 is subjected to fillet welding 24.
Then, the fixing member 2 is fixed onto the anchor member 1. At this time, it is advantageous to provide a circular hole or an elongated hole in the center of the auxiliary plate 21 and plug-weld the portion.

As a result, the foundation bolts 3, 3 are fixed at predetermined positions on the foundation concrete 8, the foundation bolts 3, 3 are inserted into the holes 6, 6 of the base plate 5, and the nuts 7, 7 are attached to the foundation bolt 3. The column base 4 is supported on the foundation concrete 8 by being screwed onto and tightened. After the column base 4 is supported, the stress for supporting the column base 4 mainly acts on the threaded portion 22, and the detent welding 2 is performed.
Since it does not act directly on the 3rd part, even if there is welding failure such as insufficient penetration or slag inclusion in the weld 23 part,
Along with that, the situation that the joint strength is reduced does not occur.

Furthermore, when welding the foundation bolt 3 ,. Since the base bolt 3 is supported by being screwed into the screwing portion 22, a separate supporting means is not required and the welding operation is extremely easy.

[0017]

As described above, the fixing structure of the foundation bolt of the present invention is such that the anchor member having the anchor material provided on the temporary surface of the anchor plate and the base bolt are screwed to the screwing portion of the auxiliary plate, and the detent welding is performed. And a fixing member in which a foundation bolt is erected on the upper surface of the auxiliary plate, respectively, are formed separately
Since the fixing member is fixed to the anchor member, the work of positioning and fixing the foundation bolt can be easily performed, and sufficient joint strength can be obtained.

[Brief description of drawings]

FIG. 1 is a side sectional view showing a fixing structure of an embodiment of the present invention.

FIG. 2 is a side sectional view showing a forming process of the fixing structure according to the embodiment of the present invention.

FIG. 3 is a side sectional view of a main portion showing a fixed portion of a foundation bolt.

FIG. 4 is a side sectional view of a main portion showing a fixed portion of a foundation bolt.

FIG. 5 is a side sectional view of a main portion showing a fixed portion of a foundation bolt.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Anchor member 2 Fixing member 3 Foundation bolt 11 Anchor plate 12 Anchor material 21 Auxiliary plate 22 Screw part 23 Detent welding

Claims (1)

[Claims] 1. An anchor member in which an anchor material is provided on a lower surface of an anchor plate, and a base bolt is screwed on a screwing portion of an auxiliary plate, and then fixed by vertically fixing the auxiliary bolt on the upper surface of the auxiliary plate. A fixing structure for a foundation bolt, characterized in that the fixing member is fixed to the anchor member by forming the members separately from each other.