JPH0476118A - Frame of foundation for steel structure building - Google Patents

Abstract

PURPOSE:To correctly position an anchor bolt and to simplify the structure of a frame by connecting an anchor frame fixed to the position of a pillar for a steel structure building through a connecting bar arrangement whose main reinforcement at the upper end serves as a turnbuckle for regulating a space between the anchor frames. CONSTITUTION:An anchor frame 2 is set on a base 2, and a connecting member 5 is joined to a base 1 and fixed in revelling concrete 3. The anchor frames 2 provided at the position of each pillar 22 are connected through a connecting bar arrangement 14 formed of a main reinforcement 15 at the upper end, a main reinforcement 16 at the lower end and a hoop reinforcement 17. A main reinforcement 15 is used as a turnbuckle 18 for joining the ends of screw bars 19, 20 with a frame member 8. The rotary member 21 of the turnbuckle 18 is rotated to regulate a mutual space between the upsides of the anchor frames for positioning the upside of an anchor bolt 10. Thus the anchor bolt 10 and the pillar 22 can be mutually firmly and securely connected.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention is applied to a concrete foundation of a steel structure building. In the 1960s,
．． 0-830.5, Japanese Utility Model No. 6 M-58645, the framework of the foundation consists of an anchor frame with anchor bolts connected to the base plate of the column positioned at each position where the column is erected. It is formed by fixing the anchor frames to concrete and connecting these anchor frames with each other using connecting reinforcement.

[Problem to be solved by the invention]

In order to firmly and reliably fix the columns of a steel structure building to a concrete foundation, it is important to accurately position the anchor bolts provided for each column.

Conventionally, the anchor frame in which the anchor bolts are positioned is composed of main reinforcements extending vertically and hoop reinforcements surrounding these, and the whole has a vertically long cage shape, so the lower part is fixed to concrete. too,
The upper part of the anchor frame swings back and forth, left and right, and the work of connecting the anchor frames with each other using the connection reinforcement arrangement is performed with the upper part of the anchor frame swinging in this way.
Even when the anchor bolts are positioned and arranged on the anchor frame, there is a problem in that errors occur in the positions of the anchor bolts.

An object of the present invention is to provide a steel structure building in which, even if the structure of the anchor frame is such that the upper part of the anchor frame is prone to swinging, the mutual spacing between these upper parts can be set accurately, and the anchor bolt can be accurately positioned. It provides the framework for the foundation of business.

[Means for solving problems]

In the framework of the foundation for a steel structure building according to the present invention, anchor bolts that are connected to the base plates of the columns of the steel structure building are positioned and arranged, and are fixed to the concrete with "C" at each position where the columns are erected. the anchor frame, the upper main reinforcement is a turnbuckle, and the turnbuckle is constructed between upper parts of the anchor frame to connect the anchor frames to each other, and the turnbuckle The anchor frame is characterized in that the distance between the upper parts of the anchor frame is adjusted.

[Effect]

When the turnbuckle is extended or retracted, the upper part of the anchor frame on which the turnbuckle is installed swings to adjust the distance between them, and if the turnbuckle is extended or retracted when the predetermined distance is reached, the upper part of the anchor frame They are now connected by turnbuckles at the same intervals, and if you perform the above steps on the turnbuckles placed between each anchor frame, the positions of these anchor frames will be determined, so the anchor frames This means that the anchor bolt positioned at is also positioned.

〔Example〕

An embodiment of the present invention will be described below based on the accompanying drawings.

In FIG. 1, a base l and an anchor frame 2 placed on the base l are arranged at each predetermined position where a column of a steel structure building is erected. The base l is
As shown in FIG. 2, the legs IA are inserted and fixed into the concrete 3 placed at the bottom of the root cut. As shown in FIG. 1, the anchor frame 2 includes anchor plates 4 at the four corners,
A connecting member 5 made of angle material that connects these anchor plates 4, main reinforcements 6 rising vertically from the anchor plates 4, and hoop reinforcements 7 surrounding these main reinforcements 6,
The structure includes a rectangular frame member 8 connected to the upper part of the main reinforcement 6, and a positioning plate 9 joined to the frame member 8, and each anchor plate 4 has a lower part of an anchor bolt 10 extending in the vertical direction. combined.

The tip 10A of the anchor bolt IO protrudes upward from the frame member 8, and while inserting the tip 10A of the anchor bolt IO into the hole 11 formed in the positioning plate 9, the positioning plate 9 is placed on the frame member 8, and the positioning mark 12.13 is placed on the frame member 8.
By joining the positioning plate 9 to the frame member 8 by welding while matching the
will be placed on the anchor frame 2 in a positioned manner.

The anchor frame 2 configured as described above is placed on the base 1, and by joining the connecting member 5 to the base 1 by welding, the anchor frame 2 is placed at a predetermined position where the pillars of a steel structure building are erected. At this point, it is fixed to the sacrificial concrete 3 via the base 1.

As shown in FIG. 2, the above-mentioned anchor frames 2 are provided at each position of the columns 22 of a steel structure building, and these anchor frames 2 are connected by connection reinforcing bars 14. The connecting reinforcement 14 is composed of an upper main reinforcement 15, a lower end main reinforcement 16, and a hoop reinforcement 17 surrounding these main reinforcements 15 and 16.

The upper end main reinforcement 15 is a turnbuckle 18, and this turnbuckle 18 has a right-hand thread, as well as a well-known one.
Left-handed threaded rods 19, 20 and these threaded rods 19, 2
0, and a rotating member 21 connecting threaded rods 19, 2.
The end opposite to the rotating member 21 of No. 0 is connected to the upper part of the two anchor frames 2 connected by the connecting reinforcement 14, specifically, to the frame member 8.

In this way, in this embodiment, the upper main reinforcement 1 of the connection reinforcement 14 is
5 is a turnbuckle 18, so the lower end main reinforcement 1
When the rotating member 21 of the turnbuckle 18 is rotated before or after the end of the turnbuckle 6 is welded to the anchor frame 2, the turnbuckle 18 expands and contracts and its length changes. 2, the upper part swings around the lower part joined to the base l.

Therefore, the distance between the upper portions of the anchor frames 2 is adjusted by the turnbuckle 18, and if the rotating operation of the rotating member 21 is completed when the distance reaches a predetermined value, the upper portions of the anchor frames 2 will be moved to the predetermined position. This means that they are connected by the turnbuckle 18 in a state where they are spaced apart.

At least two connecting reinforcements 14 are connected to one anchor frame 2, and since these connecting reinforcements 14 form a right angle, the connecting reinforcements 14 provided between each anchor frame 2 are If the above-mentioned expansion/contraction and length adjustment operations are performed for the fourteen turnbuckles 18, the upper part of the anchor frame 2 will no longer swing back and forth, left and right, and the position of the anchor frame 2 will be determined. For this reason, anchor frame 2
The position of the upper part of the anchor bolt lO, which has been positioned as described above, is also automatically determined.

After that, a foundation forming form is placed outside the anchor frame 2 and the connecting reinforcement 4, and concrete slurry is poured into this form up to the height of the positioning plate 9,
This forms the concrete foundation.

The framework of the completed concrete foundation is composed of the anchor frame 2 and the connecting reinforcement 14, and the turnbuckle I8 used to set the exact distance between the upper parts of the anchor frame 2 is part of this framework. It is buried in the foundation as it is.

The tip 10A of the anchor bolt lO protrudes from the top surface of the concrete foundation, and the column 22 is lowered while inserting the tip 10A into the hole of the base plate 23 provided at the bottom of the column 22 of the steel structure building, and the nut 25 is tightened on the tip 10A. As a result, the base plate 23 is coupled to the anchor bolt lO. The height of the base plate 23, that is, the height of the pillar 22, is adjusted by a level adjustment bolt 24 inserted through the positioning plate 9 and screwed into a nut 24A (see FIG. 1), and between the positioning plate 9 and the base plate 23. The gaps are filled with grout.

As described above, according to this embodiment, the plurality of anchor bolts lO in one anchor frame 2 are positioned by the positioning plate 9, and the upper part of each anchor frame 2 is set at a predetermined interval by the turnbuckle 18. This makes it possible to accurately insert the tips 10A of the anchor bolts 10 into the holes formed in the base plates 23 of the columns 22 that are erected at predetermined intervals, thereby increasing the bond strength between the anchor bolts 10 and the columns 22. You can make it bigger.

FIG. 3 shows a second embodiment of the invention.

The anchor frame 32 according to this embodiment is constructed by coupling a positioning plate 39 to the upper part of the main reinforcement 36 extending in the vertical direction, and the hole 41 of the positioning plate 39
By inserting the tip end 40A of the anchor bolt 40 into the anchor bolt 40, the anchor bolt 40 is positioned and arranged in the anchor frame 32. A nut 42 is attached to the positioning plate 39, and a threaded rod I9 of the turnbuckle I8 is screwed into the nut 42, thereby connecting the turnbuckle 18 and the upper part of the anchor frame 32. According to this embodiment, the frame member 8 in the previous embodiment can be omitted, and the number of parts can be reduced accordingly.

FIG. 4 shows a third embodiment of the invention.

In this embodiment, the positioning plate 59 has two upper and lower first
The anchor frame 52 is composed of a member 59A and a second member 59B, and is constructed by coupling the lower first member 59A to the upper end of a main reinforcement 56 extending in the vertical direction.

A hole 61A having a larger diameter than the anchor bolt 60 is formed in the first member 59A, and a hole 61B having a diameter corresponding to the anchor bolt 60 is formed in the second member 59B.

The second member 59B connects the bolt 63 to the hole 6 of the second member 59B.
The anchor bolt 6 is attached to the first member 59A by inserting it into the screw hole 65 of the first member 59A, and protruding loosely from the hole 61A at this time.
0 is inserted into the hole 61B.

As shown in FIG. 5, the second member 59B has the bolt 63 inserted.
The hole 64 is larger than the bolt 63, so the bolt 6
3, the second member 59B can be moved horizontally relative to the first member 59A, thereby positioning and arranging each bolt 60 on the anchor frame 52.

By making the head 63A of the bolt 63 sufficiently larger than the hole 64, the head 63A does not fall into the hole 64.

The upper part of the anchor frame 52 and the turnbuckle 18 are connected by screwing the threaded rod 19 of the turnbuckle 18 into a nut 62 provided on the first member 59A, similar to the embodiment shown in FIG.

According to this embodiment, each anchor bolt 60 is roughly positioned in advance by the hole 61A of the first member 59A, and then the anchor bolt 60 is precisely positioned by the hole 61B of the second member 59B. Therefore, it is no longer necessary to create an anchor frame by inserting the tip of the anchor bolt into a hole having a diameter corresponding to that of the anchor bolt from the beginning, and the positioning work of the anchor bolt can be performed much more easily.

The structure of the anchor frame for positioning and arranging the anchor bolts as described above is arbitrary. In addition, = 12- In each of the above embodiments, the threaded rod of the turnbuckle is screwed into the screw hole or nut provided in the upper part of the anchor frame, but this connection structure is not limited to this, and it may be connected by welding, for example. It may also be something that is done.

〔Effect of the invention〕

According to the present invention, each anchor frame is connected by a connecting reinforcement in which the upper main reinforcement is a turnbuckle, so the turnbuckle makes it possible to maintain a predetermined distance between the upper parts of the anchor frames. Therefore, the anchor bolts positioned on the anchor frame can be accurately positioned, and the anchor bolts can be firmly and reliably connected to the base plate of the column of the steel structure building.

In addition, since the turnbuckle constitutes a part of the framework buried in the concrete foundation, it can be used both as a member for setting the spacing at the top of the anchor frame and as a member constituting the framework. Accordingly, the structure can be simplified and the number of required parts can be reduced.

[Brief explanation of drawings]

FIG. 1 is a perspective view showing the entire anchor frame according to the first embodiment, and FIG. 2 is a front sectional view showing a state in which two anchor frames according to the first embodiment are connected by a connecting reinforcement.
3 is a perspective view showing the upper part of the anchor frame according to the second embodiment, FIG. 4 is a perspective view showing the upper part of the anchor frame according to the third embodiment, and FIG. 5 shows the positioning shown in FIG. 4. It is a longitudinal cross-sectional view showing a state where the first member and the second member of the plate are connected with bolts. 1... Base, 2, 32.52... Anchor frame, 3... Disposable concrete, 9, 39.59... Positioning plate, 10, 40.60... Anchor bolt, 14...・Connection reinforcement, 15...Top main reinforcement, 18
...Turnbuckle.

Claims (1)

[Claims] (1) The anchor bolts connected to the base plates of the columns of the steel structure building are positioned and arranged, and the anchor frames fixed to the concrete at each position where the columns are erected and the upper main reinforcement are turnbuckles. The turnbuckle includes connecting reinforcement installed between the upper parts of the anchor frames to connect the anchor frames to each other, and the turnbuckle adjusts the distance between the upper parts of the anchor frames. A framework for a foundation for a steel structure building characterized by: