JPH0721191B2 - Anchor bolt driving Precast concrete block and anchor bolt driving method - Google Patents

Description

TECHNICAL FIELD The present invention relates to an anchor bolt driving precast concrete block and an anchor bolt driving method for fixing the foot of a steel frame of a steel frame reinforced concrete building.

[Conventional technology]

FIG. 3 is a diagram for explaining the work up to the placing of concrete foundation and the fixing of the pillar steel frame in the conventional high-rise building using the pillar steel frame. In the figure, 11 is crushed stone, 12 is discarded concrete, 13 is foundation reinforcement, 14 is column reinforcement, 15 is column steel, and 16 is a base plate.

In the basic construction of high-rise buildings such as steel-framed concrete (S) and steel-framed reinforced concrete (SRC), for example, as shown in Fig. 3 (a), first, excavate the ground to a predetermined depth and use a bulldozer or the like. After leveling, crushed stone 11 is laid with a thickness of about 100 to 150 mm, and discarded concrete 12 is cast on it with a thickness of about 50 mm. After that, discard concrete
Positioning is performed on 12, and as shown in FIG. 3 (b), the basic reinforcement 13, the reinforcing bars 14 at the positions of the columns, and the underground beam reinforcements (not shown) in the X and Y directions are assembled, and again. Basic muscle (Hakama muscle)
Assemble and set the form on the outer circumference. Then, a frame is set here, the anchor bolt is positioned, and the anchor bolt is fixed to the underground beam by welding. In this way, the reinforcing bars, the underground beam bars, and the anchor bolts are assembled and fixed, and then the foundation concrete is placed. When the casting of the basic concrete is completed, the pillar steel frame 15 as shown in FIG. 3 (c) is dropped into the anchor bolt in alignment with the fixing hole of the base plate 16, and the pillar steel frame 15 is fixed by tightening the nut.

[Problems to be solved by the invention]

Generally, the lap joint (lap joint) method, pressure welding method, mechanical joint method, etc. are adopted as the joint method of the reinforcing bar. These methods are also adopted for the joint of the underground beam, but these methods are used. Even if the anchor bolts are welded and fixed to the jointed underground beam reinforcement, the accuracy error is likely to occur due to the fact that the anchor beam is actually accommodated, the concrete is placed, etc., and the pitch of the anchor bolts and the base plate of the column steel frame The pitch position of the fixing hole does not match,
There is a problem that the position of the pillar is misaligned.

The present invention solves the above problems, and an object of the present invention is to provide an anchor bolt driven precast concrete block and an anchor bolt driven method that ensure installation accuracy and improve workability.

[Means for solving problems]

Therefore, the anchor bolt driven precast concrete block of the present invention is characterized in that the anchor bolts are driven in advance together with the base reinforcement, the column reinforcement and the underground beam reinforcement in accordance with the fixing holes of the base plate of the steel frame, and The anchor bolt driving method is an anchor bolt driving precast concrete block in which anchor bolts have been driven in advance along with the foundation reinforcement, column reinforcement and underground beam reinforcement on the fixed holes of the base plate of the column steel frame on the positioned concrete. It is characterized in that it is installed and assembled with underground girder bars, and then concrete concrete is placed.

[Action]

In the anchor bolt driving precast concrete block and the anchor bolt driving method of the present invention, since the anchor bolt is driven in accordance with the predetermined dimensions in the factory in advance, at the site, just install the anchor bolt driving precast concrete block,
Positioning of individual anchor bolts and welding and fixing work to the underground beam reinforcement are unnecessary. Also, since the precast concrete block is a heavy object, it will not move due to the placement of concrete after installation,
There will be no misalignment after installation.

〔Example〕

 Hereinafter, embodiments will be described with reference to the drawings.

FIG. 1 is a diagram showing an embodiment of an anchor bolt driven precast concrete block according to the present invention, FIG.
The drawings are views for explaining an anchor bolt driving method according to the present invention. In the figure, 1 is a column reinforcing bar, 2 is an anchor bolt, 3 and 6 are underground beam reinforcing bars, 4 is a precast concrete block, 5 is a column steel frame, and 7 is a discarded concrete.

As shown in Fig. 1, the anchor bolt driven precast concrete block is one in which the foundation reinforcement, column reinforcement 1, anchor bolt 2, underground beam reinforcement 3 have been driven into the box-shaped precast concrete block 4 in advance at the factory. ,
The anchor bolts 2 are arranged with a size and pitch according to the dimensions of the fixing holes of the base plate of the pillar steel frame, and the pillar reinforcing bars 1 are arranged with a predetermined length around the pillar reinforcing bars fixed by the anchor bolts 2. . Further, the underground beam reinforcement 3 is arranged with a predetermined length so as to be jointed with the underground beam reinforcement assembled on the discarded concrete. Therefore, the anchor bolt 2 can be positioned by installing the anchor bolt driven precast concrete block at a predetermined position (column position).

FIG. 2 is a diagram for explaining an anchor bolt driving method using the anchor bolt driving precast concrete block shown in FIG. As mentioned earlier, excavating the ground, leveling it, laying crushed stones, and throwing concrete on it, positioning is performed and the foundation bar,
Assembling the column reinforcement and the underground girder reinforcement and fixing the anchor bolts. When using the anchor bolt driven precast concrete block of the present invention, first the position on the discarded concrete 7 as shown in FIG. The anchor bolt driving precast concrete block 8 is installed according to the start, and the underground beam reinforcement 6 is joined thereto to assemble the underground beam reinforcement. Then, for example, the foundation concrete is cast up to the height of the dotted line in the figure, and when the casting of the concrete is completed, the pillar steel frame is dropped into the anchor bolt of the precast concrete block 8 and tightened with the nut to tighten the pillar steel bar and the pillar reinforcement. Assemble.

The present invention can be modified in various ways and is not limited to the above-mentioned embodiments. For example, in the examples, the shape of the precast concrete block with anchor bolts is shown as a rectangle (cube, rectangular parallelepiped), but if the thickness is from the level of waste concrete to the level at which the feet of pillar steel frames are fixed, other shapes can be used. It may have a shape.

〔The invention's effect〕

As is clear from the above description, according to the present invention, the anchor bolts are pre-cast concrete blocks that have been previously anchored with anchor beams in the factory together with the underground beam reinforcement and column reinforcement, so that the efficiency of work by factory production, It is possible to improve the quality and accuracy of the product, and prevent the size of the anchor bolt from becoming inconsistent with the fixing hole of the base plate of the pillar steel frame due to the deviation caused by the site work. Also, because it is a precast concrete block with anchor bolts, it does not move due to the placement of foundation concrete. In addition, by installing the anchor bolt driven precast concrete block according to the positioning on the discarded concrete, the anchor bolt driven precast concrete block will not be displaced even when the concrete is placed, so the anchor bolt embedding position is fixed. It can be secured by the installation accuracy of the bolt-in precast concrete block.

[Brief description of drawings]

FIG. 1 is a diagram showing an embodiment of an anchor bolt driven precast concrete block according to the present invention, FIG.
FIG. 3 is a diagram for explaining the anchor bolt driving method according to the present invention, and FIG. 3 is a diagram for explaining the work up to the foundation concrete placement and the column steel frame fixing in the conventional high-rise building using the column steel frame. . 1 ... Column reinforcement, 2 ... Anchor bolt, 3 and 6 ... Underground beam reinforcement, 4
... precast concrete blocks, 5 ... column steel frames,
7 ... Discarded concrete.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (71) Applicant 999999999 Sato Industry Co., Ltd. 1-11 Sakuragicho, Toyama City, Toyama Prefecture (71) Applicant 999999999 Shimizu Corporation 2-16-1 Kyobashi, Chuo-ku, Tokyo (71) ) Applicant 999999999 Taisei Corporation 1-25-1 Nishishinjuku, Shinjuku-ku, Tokyo (71) Applicant 999999999 Takenaka Corporation Ltd. 4-27, Honmachi, Higashi-ku, Osaka-shi, Osaka (71) Applicant 999999999 Toda Construction Co., Ltd. Company 1-7-1, Kyobashi, Chuo-ku, Tokyo (71) Applicant 999999999 Fujita Co., Ltd. 4-6-15 Sendagaya, Shibuya-ku, Tokyo (71) Applicant 999999999 2-3 Akasaka, Minato-ku, Tokyo No. 6 (71) Applicant 999999999 Hitachi Zosen Corporation 1-6-14 Edobori, Nishi-ku, Osaka-shi, Osaka (72) Inventor Yukio Hasegawa Tokyo 3-4-1 Okubo, Shinjuku-ku, Institute of Systems Science, Waseda University (72) Inventor Yasuo Inoue 3-543, Shibazonocho, Kawaguchi City, Saitama Prefecture (543) (72) Kazuhiko Arai 2-9-16 Nakamachi, Urawa City, Saitama Prefecture (72) Inventor Yusuke Matsushita Lions Mansion Kagurazaka No. 3-102 16 Tsukiji-cho, Shinjuku-ku, Tokyo (72) Inventor Shinji Yamashita 91-1, Mita, Atsugi-shi, Kanagawa Prefecture (72) Inventor Nobuhiro Okuyama Setagaya-ku, Tokyo 1-20-8 Shirota Dormitory of Shimizu Corporation (72) Inventor Akira Tsubota 2-5-14 Minamisuna, Koto-ku, Tokyo Inside the Takenaka Corporation Technical Research Institute (72) Masato Mori Kohoku-ku, Yokohama-shi, Kanagawa 246, Machi (72) Inventor Toru Shinozaki 24 Shimogido, Shimotsuma-shi, Ibaraki Prefecture (72) Ryoji Yoshitake 1521-93 Nogaya-cho, Machida-shi, Tokyo (72) Inventor Shu Takeda 18 Manda, Hiratsuka, Kanagawa Prefecture Komatsu Ltd. Taira ▲ Tsuka ▼ Dormitory No. 311 (72) Inventor Kura Kazuo 1-6-14 Edobori, Nishi-ku, Osaka City, Osaka Prefecture Hitachi Zosen Corporation Inner (56) References Patent Sho 52-132508 (JP, A) JP Akira 58-37235 (JP, A)

Claims (3)

[Claims] 1. A precast concrete block with anchor bolts for fixing the foot of a steel frame of a steel-framed reinforced concrete structure, which is previously provided in a fixing hole of a base plate of a steel frame together with a foundation bar, a column reinforcing bar and an underground beam reinforcing bar. Anchor bolt driving precast concrete characterized by driving anchor bolts together
block. 2. The precast concrete block with anchor bolts as set forth in claim 1, having a thickness from the level of waste concrete to the level at which the column steel foot is fixed. 3. An anchor bolt driving method for driving an anchor bolt for fixing a foot of a steel frame of a steel-framed reinforced concrete building using an anchor bolt driving precast concrete block, which comprises: Anchor bolt driving precast concrete block in which anchor bolts have been driven in advance together with foundation reinforcements, column reinforcements and underground beam reinforcements to fix holes in the base plate of the steel frame, and underground beam reinforcements are assembled, and then foundation concrete is placed. Anchor bolt driving method characterized by: