JPH08209711A - Support structure for column base - Google Patents

Abstract

PURPOSE: To provide a simple support structure for calum base having a sufficient horizontal yield strength for an installation frame constructed of anchor bolts erected in a frame form by arranging bracing members between adjoining anchor bolts. CONSTITUTION: An installation frame F is constructed of a plurality of anchor bolts 4, 4 that are erected perpendicularly in parallel with one another in a frame form. Threads are provided at each of the anchor bolts 4 at its upper and lower parts, and the anchor bolts are connected integrally at points near the upper thread with a splice plate 6 on installation. In a support structure fro a column base equipped with such installation frame F, bracing members 5, 5 are provided between the adjoining anchor bolts 4 of the installation frame F. Therefore, tilt and twist in the vertical direction are corrected automatically as the installation frame F is erected. As rigidity in the horizontal direction is applied on installation, swing in the horizontal direction can be eliminated and dislocation can be prevented even though external force is applied.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an exposed type column base support structure for supporting a column base using anchor bolts.

[0002]

2. Description of the Related Art FIG. 9 is a structural explanatory view of a conventional support structure for a column base. In FIG. 9, 2 is discarded concrete, 3
Is a support frame, 4 is a plurality of anchor bolts made of deformed bars, and 7 is basic concrete. Reference numeral 8 is a base plate, 9 is a column base, and 10 is a nut. Anchor bolt 4
At the time of installation, an attachment plate (not shown) corresponding to the base plate 8 is provided on the upper portion of the anchor bolt 4.
Is attached.

Then, the anchor bolts 4 at the four corners are inserted into the corner frame portions 31 of the support frame 3 and fixed part way by the tightening screws 32. After the installation frame is formed, reinforcement of the underground beams and the like are performed, and then the foundation concrete 7 is poured. Then, after the foundation concrete 7 is hardened, the base plate 8 is placed on the upper portion of each anchor bolt 4 as shown in the drawing. The nut 10 is screwed into the upper screw of the anchor bolt 4, the base plate 8 is tightened, and the column base 9 is erected on the base.

[0004]

As described above, the conventional support structure for the column base is such that the long anchor bolts 4 whose upper portions are connected to each other by the attachment plates are supported by the support frame 3 midway during the installation. Was becoming. Therefore, the rigidity of the installation frame of the anchor bolt 4 in the horizontal direction is soft, and the positional deviation often occurs due to twisting or inclination when arranging.

On the other hand, in order to increase the rigidity of the installation frame in the horizontal direction, it is conceivable to arrange the hoop muscles surrounding all the anchor bolts 4. However, when the hoop reinforcement with a fine interval is performed, there is a problem that the reinforcement with manual work is complicated and the work man-hour increases accordingly.

The present invention has been made in order to solve the above-mentioned problems in the conventional support structure for the column base, and the installation frame is stable and there is no positional deviation in the horizontal direction.
Moreover, it is an object of the present invention to realize a support structure for a column base using anchor bolts, which has various characteristics such as easy transportation of materials and suitable for on-site construction.

[0007]

SUMMARY OF THE INVENTION According to the present invention, a plurality of anchor bolts are formed in the upper and lower portions, the upper screw and its vicinity are integrally connected by an addition plate during installation, and are vertically attached to a support frame. In a support structure for a column base provided with an installation frame assembled in a frame shape, a support structure for the column base is provided in which a bracing member is provided on an adjacent anchor bolt in the installation frame.

Further, according to the present invention, there is provided an installation frame in which a plurality of anchor bolts made of screw reinforcing bars, which are vertically connected to the support frame, are integrally connected to each other at the time of installation and are assembled in a frame shape. In the support structure of the column base,
This is a structure for supporting the column base in which the bracing members are provided on the adjacent anchor bolts in the installation frame. Further, the supporting structure for the column base portion is formed by forming the bracing portion of the bracing member with a metal wire. Further, the supporting structure of the column base portion is formed by forming the connecting portion of the brace members with a thin metal plate.

[0009]

[Operation] Take out two braces, stack them and place them on the ground. Anchor bolts are screwed from the lower side to the female screws of the two bracing fixing parts arranged side by side. The anchor bolts are screwed to each other to a length substantially corresponding to the upper and lower screwed portions. Similarly, two braces are screwed and assembled to all the anchor bolts. Approximately 90 assembled two braces
Open it once and overlap the fixed parts at the bottom of the neighbors with each other,
Place each anchor bolt on the fixing part of the support frame.

The screw on the lower side of the anchor bolt is integrally screwed into the female screw or nut of the fixing portion and the fixing portion, which are opened 90 degrees and overlap each other. Then, the four anchor bolts screwed one after the other are erected on the support frame while being automatically corrected in the vertical direction mutually due to the brace of the same length.

[0011]

【Example】

Example 1. Embodiments of the present invention will be described below with reference to the drawings. 1 is a configuration explanatory view of a first embodiment of the present invention, and FIG. 2 is a sectional view taken along the line aa of FIG. In the embodiment of the present invention, portions corresponding to those of the conventional structure are designated by the same reference numerals and the description thereof is partially duplicated, but the configuration is different and will be described in some detail.

Reference numeral 2 is waste concrete, 3 is a support frame, and 4 is a plurality of anchor bolts. The discarded concrete 2 is placed on the excavated ground (root cutting bottom) of the construction site of the building, and the support frame 3 is fixed by the discarded con anchor 21 embedded in the discarded concrete 2. Reference numeral 33 is a frame base of the support frame 3, 34 is a frame post, and 35 is a horizontal fixing portion provided with a female screw.

Here, the anchor bolt 4 is made of a screw rebar and is erected on the support frame 3. Reference numeral 5 is a substantially S-shaped brace, and 6 is an attachment plate. The structure of Brace 5 is shown in Fig. 3.
Is shown in. Reference numeral 51 denotes a bracing portion of the bracing portion 5, and 52 denotes fixing portions formed at both upper and lower ends of the bracing portion 51. Fixed part 5
Reference numeral 2 denotes a square plate, and a female nut 53 is bored in the center to form a square nut. The anchor bolt 4 is screwed into the female screw 53 of the fixing portion 52. The length L of the brace portion 51 of the brace 5 and the pitch of the female screw 53 are selected corresponding to the standard anchor bolt 4.

Although not shown in detail, the additional plate 6 is made of a substantially square metal plate. Insertion holes are provided at the four corners of the additional plate 6, and the four anchor bolts 4 are inserted and integrally connected. Reference numeral 8 is a base plate, 9 is a column base, and 10 is a nut. Besides, although not all are shown in FIGS.
Reference numeral 1 is the ground, 7 is a concrete foundation, and F is an installation frame to be assembled at the time of installation.

The operation of the embodiment of the present invention having the above construction will be described below. At the planned construction site of the building, root cutting will be carried out to a depth according to the scale of the building. Then, crushed gravel is sprinkled on the stones arranged on the root cutting bottom, and the discarded concrete 2 in which the discarded con anchor 21 is filled is placed. On the surface of the discarded concrete 2 which has been smoothed after the curing period, a pillar core or the like made of a tattoo is clearly indicated.

On the other hand, the constituent materials of the installation frame F including the support frame 3, the anchor bolts 4, the braces 5, the attachment plates 6 and the like are prepared in advance and carried to the construction site. Substantially all of these materials including the attachment plate 6 can be stacked flatly, and the transportation efficiency is extremely high compared to the factory assembled physical delivery method. Here, the assembling of the installation frame F is started. First, the support frame 3
After assembling, take out two struts 5, stack them as shown in Fig. 4 (a) and line them up on the ground. The anchor bolt 4 is screwed into the female screw 53 of the fixing portion 52 in which the braces 5 are arranged from below. At this time, the anchor bolt 4
The screwing length of is screwed to the fixing portion 52 to a length substantially corresponding to the upper and lower screwing portions. Similarly, two braces 5 are screwed and assembled to all the anchor bolts 4.

Next, the two assembled braces 5 are opened about 90 degrees, and the anchor bolts 4 are placed on the fixing portions 35 provided at the four corners of the support frame 3. In this case, the fixing parts 52 at the bottoms of the adjacent members of the brace 5 opened 90 degrees are overlapped with each other. Female screw 5 of fixed part 52 and fixing part 35 that are overlapped
As shown in (b), the screws on the lower side of the anchor bolt 4 are integrally screwed into the screws 3, 35. The four anchor bolts 4, which are screwed one after another, are erected on the support frame 3 while being automatically corrected in mutually vertical directions by the brace 5 having the same length.

An attachment plate 6 is attached and connected to the upper portions of the four anchor bolts 4 erected on the support frame 3 by the brace 5. The installation frame F to which the attachment plate 6 is attached is shown in a semi-cut view in FIG. The respective anchor bolts 4 are restrained from being mutually distorted by the struts 5 and are firmly connected. At this time, if necessary, the verticality and horizontality of the installation frame F are checked. After that, the foundation work of the column base is completed by placing the concrete beams and reinforcing the foundation, and placing and hardening the concrete. When the foundation work is completed, the formwork is removed and the root cutting is backfilled.

After the concrete is poured, the attachment plate 6 is removed. Then, the mortar (commonly known as bun) is brought out to a horizontal level, and the holes of the base plate 8 of the column base 9 carried by the crane are inserted into the anchor bolts 4. The nut 10 is screwed into the anchor bolt 4 exposed from the hole, and the base plate 8 is tightened. The base plate 8 is surrounded by a pier, and grout mortar is injected into the space on the bottom surface, and the steel frame erection using the column base 9 is completed.

FIG. 6 is an explanatory view of a modified example of the brace 5. In FIG. 6, reference numeral 54 is a square nut provided with a female screw 53 on a slightly thick plate, and 55 is a connecting plate made by punching out a thin metal plate that can be easily bent. Reference numeral 55a is a fixing portion at both ends of the connecting plate 55, 55b is a fool hole provided in the fixing portion 55a, and 55c is a connecting portion. The fixed portion 55a is formed in the same shape as the square nut 54, and the width of the connecting portion 55c is formed to be less than the width of the fixed portion 55a. Fixed parts 5 at both ends of the connecting plate 55
A square nut 54 is integrally fixed to 5a by welding or the like.

Also in this modification, the installation frame F can be assembled by the assembling operation of the first embodiment described above. In particular, since the connecting plate 55 is made of a thin metal plate and is flat, the connecting plate 55 can be bent and connected to the anchor bolt 4 at a construction site. In addition, the flat volume is smaller than that of the first embodiment, and there is an advantage that storage and transportation are more convenient.

Embodiment 2 FIG. 7 is an explanatory diagram of the configuration of Embodiment 2 of the present invention. In FIG. 7, 56a and 56b are upper and lower intermediate nuts.
Besides, in the second embodiment, the braces 5 as shown in FIGS. 8 (a) and 8 (b) are used. Reference numeral 57 in FIG. 3A is a metal band, and hook portions 57a are formed at both ends. In addition, 58 of (b)
Is a flexible wire rope and has ring portions 58 at both ends.
a is formed. Also in this Example 2, the length L is made in accordance with the regulation.

Adjacent metal strips 57 and hook portions 57a and ring portions 58a at the lower end of the wire rope 58, which constitute the brace 5 of the second embodiment, are sandwiched between the female screw of the fixing portion 35 and the lower intermediate nut 56a. Fixed. Further, the hook portion 57a and the ring portion 58a at the upper end are connected to the anchor bolt 4 by the upper intermediate nut 56b and the nut 10 via the attachment plate 6.
Is pinched at the tip of the. The braces 5 between the metal band 57 and the wire rope 58 are configured to connect the adjacent anchor bolts 4 firmly to each other by the substantially same operation as described above.

In the above-described embodiment, the case where the addition plate 6 is removed and the column base 9 is fixed has been described, but the column base 9 may be fixed while the addition plate 6 is attached.

[0025]

According to the present invention, a screw is formed on the upper and lower parts, and the upper screw and its vicinity are integrally connected by an adder plate during installation, and a plurality of anchor bolts vertically attached to a support frame are frame-shaped. In the support structure of the column base provided with the assembled installation frame, the support structure of the column base is provided in which the bracing members are provided on the adjacent anchor bolts in the installation frame.

Further, according to the present invention, there is provided an installation frame in which a plurality of anchor bolts, each of which is composed of screw reinforcing bars and which are vertically connected to the support frame, are assembled in a frame shape, the upper portion of which is integrally connected by an addition plate during installation. In the support structure of the column base,
A support structure for the column base was constructed by providing bracing members on the adjacent anchor bolts in the installation frame. In addition, a supporting structure for the column base portion is configured in which the bracing portion of the bracing member is made of a metal wire. Further, a supporting structure for the column base portion is constructed in which the connecting portion of the brace members is made of a thin metal plate.

As a result, when the installation frame is assembled, the vertical inclination and twist are automatically corrected. Therefore,
It is possible to omit the use of the additional plate. Further, since the mounting frame is added with the rigidity in the horizontal direction, there is no shaking in the horizontal direction, and even if an external force is applied at the time of bar arrangement or the like, the distortion does not occur and the position is not displaced. Furthermore, since the brace member bears the horizontal shearing force from the column base after hardening of the concrete, it is possible to reduce the number of hoop muscles attached to the outer periphery of the rising muscle. In addition, the anchor bolts and materials such as braces can be stacked flat during transportation, and the packaging can be reduced to improve the efficiency of storage and transportation.

Therefore, according to the present invention, it is possible to provide a support structure for a column base portion using an anchor bolt suitable for on-site assembly, as well as having a simple structure and a strong horizontal proof stress.

[Brief description of drawings]

FIG. 1 is a configuration explanatory diagram of a first embodiment of the present invention.

FIG. 2 is a sectional view taken along line aa of FIG.

FIG. 3 is a perspective view of the braces of FIG. 1.

FIG. 4 is a perspective view illustrating the operation of the first embodiment of the present invention.

FIG. 5 is a side half cross-sectional view explaining the operation of the first embodiment of the present invention.

FIG. 6 is a diagram for explaining another configuration of the brace according to the first embodiment of the present invention.

FIG. 7 is a side view showing a configuration of a second embodiment of the present invention.

FIG. 8 is a plan view of two braces according to the second embodiment of the present invention.

FIG. 9 is an explanatory view of a conventional anchor bolt.

[Explanation of symbols]

 3 Support Frame 4 Anchor Bolt 5 Bracing 6 Addition Plate 7 Concrete Foundation 8 Base Plate 9 Pillar 35 Fixing Part 51 Bracing Part 52 Fixing Part F Installation Frame 56a Intermediate Nut 56b Intermediate Nut 57 Metal Band 58 Wire Rope

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Shinji Suzuki 2-1, Shiraishi-cho, Kawasaki-ku, Kawasaki Kanagawa Nihon Foundry Co., Ltd. (72) Keiji Endo 2-1-1, Shiraishi-cho, Kawasaki-ku, Kawasaki-shi, Kanagawa No. Nihon Foundry Co., Ltd. (72) Inventor Toshiaki Miyao 1-2-2 Marunouchi, Chiyoda-ku, Tokyo Nihon Steel Tube Co., Ltd.

Claims (4)

[Claims] 1. An installation in which a screw is formed in an upper part and a lower part, and the vicinity of the screw of the upper part is integrally connected by an attachment plate at the time of installation, and a plurality of anchor bolts vertically attached to a support frame are assembled in a frame shape. A support structure for a column base, comprising a frame, wherein a bracing member is provided on an adjacent anchor bolt in the installation frame. 2. A column base having a mounting frame in which a plurality of anchor bolts, which are integrally connected to each other by an addition plate at the time of installation and are vertically attached to a support frame, are assembled in a frame shape. In the support structure, a bracing member is provided on the anchor bolts adjacent to each other in the installation frame, and the support structure for the column base. 3. The support structure for a column base according to claim 2, wherein the bracing portion of the bracing member is made of a metal wire. 4. The support structure for a column base according to claim 2, wherein the connecting portion of the brace members is made of a thin metal plate.