JP2001123459A - Anchor structure for upright structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide anchor structure for an upright structure capable of provid ing required embedding precision using reduced auxiliary members as much as possible, and inexpensive and excellent in workability not to allow competi tion with a reinforcement. SOLUTION: Vertical positioning plates are provided in the vicinities of upper and lower ends of anchor steel bars 11, the upper positioning plate 30 is provided with a through hole having small tolerance with respect to an outside diameter of the anchor steel bar11, and the each anchor steel bar is tightened to the each positioning plate by two nuts to form the anchor steel bars and the positioning plates into a rigid frame body, so as to serve as an anchor for the upright structure.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an anchor structure used for a precast pillar of a building or an upright structure such as a tower-like or columnar structure.

[0002]

2. Description of the Related Art When a tower-like structure, a columnar structure, or a pillar of a building is erected and fixed on a foundation, there is a technique in which the pillar or the like is fixed to anchor bolts buried in basic concrete and erected. When the structure is tall, the installation accuracy of the structure depends solely on the burial accuracy of the anchor bolts. In recent years, the construction of buildings using precast concrete or prefabricated steel columns has been extremely prosperous due to the shortened construction period and the demand for high quality in the construction of building structures. An example of such a pillar standing technique is illustrated in FIG. As shown in FIG. 7, an anchor steel rod 101 buried in an underground beam or foundation concrete 100 is connected to a PC steel rod 10 vertically penetrating through a pillar 102.
3 are added, and tension 105 is fixed at the column head 104, and the column 106 of the next layer is erected sequentially. In this technique, a number of columns 102 are arranged in a row, and beams 10 are interposed between the columns 102.
7, high-precision installation is required, and an anchor steel rod positioning frame 110 as shown in FIG. 5 has been used. As shown in a perspective view in FIG. 6, the anchor steel rod positioning frame 110 is manufactured by forming a frame 111 made of shaped steel and suspending the anchor steel rod 101 from the positioning plate 113 fixed to the upper sill 112. It is buried inside. In such a conventional frame anchor steel rod positioning frame 110, the frame 111 is large, and the reinforcing steel in the foundation concrete (not shown) and the frame 111 compete with each other, resulting in great difficulty in installation and high cost. There was a problem that is.

[0003]

In order to solve the problem that the anchor structure of the standing structure competes with the reinforcing steel, the present inventors have paid attention to the rigidity of the anchor steel rod itself to be buried.
Omitting the frame has led to the creation of the present invention that can solve the problem. An object of the present invention is to provide an anchor structure for an upright structure, which can provide the necessary embedding accuracy with a relatively small number of auxiliary members, is economical, has little competition with a reinforcing bar, has good workability, and has good workability. .

[0004]

According to the present invention, upper and lower positioning plates having positioning through holes for the anchor steel bars are provided near the upper and lower ends of the anchor steel bars, respectively. Tighten to the positioning plate,
An anchor structure of an upright structure, wherein a rigid frame is formed by an anchor steel bar and a positioning plate.

In this case, if the upper positioning plate of the anchor steel rod has a through hole having a small tolerance with respect to the outer diameter of the anchor steel rod, the dimensional accuracy on the upper end side of the anchor steel rod is increased, which is preferable. . Further, the lower positioning plate may more preferably be a relatively rigid frame made of shaped steel.

[0006]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows an anchor 10 buried and fixed.
FIG. An anchor steel rod 11 having a diameter of 32 mm is used. The upper half of the anchor steel rod 11 is housed in a sheath 12 having an enlarged diameter, and is embedded up to a launching surface 14 of a footing concrete 13. In the vicinity of the lower end of the anchor steel rod 11,
The lower positioning member 20 is provided, and the nut 21, the support plate 22, the lower positioning frame 23, and the nut 24 are assembled in this order from above, and the lower positioning frame 23 is fixedly fastened by the lower nut 24. A height adjustment bolt 25 is suspended from the lower positioning frame 23 to the upper surface of the concrete 15 so that the installation level in the height direction can be adjusted.

[0007] An upper positioning plate 30 is provided near the upper end of the anchor steel bar 11, and a nut 31, an upper positioning plate 30, and a nut 32 are arranged in this order from below. The upper positioning plate 30 has a steel rod through hole 33 having a small tolerance with respect to the outer diameter of the anchor steel rod 11 (see FIG. 2).
It is tightened by the upper nut 32. The lower nut 31 is
The upper nut 32, the positioning plate 30, and the lower nut 31 are removed when the columnar structure is erected, and an installation mortar is driven to the exposed surface of the expanded sheath 12, The lower end of the PC steel rod in the columnar structure and the upper end of the anchor steel rod 11 are connected by a coupler.
At this time, the slight construction error of the connection core wire between the PC steel rod in the columnar structure and the anchor steel rod 11 can be adjusted within the range of the inner diameter of the expanded sheath.

FIG. 2 is a plan view of the upper positioning plate 30 taken along the line AA in FIG. The steel rod guide hole 33 is a hole having a margin of about 2 mm with respect to the outer diameter of the steel rod of 32 mm. FIG. 3 is a plan view of the lower positioning frame 23 taken along the line BB in FIG. A steel rod guide hole 26 and a height adjustment bolt hole 27 are formed. The steel rod guide hole 26 of the lower positioning frame 23 does not need to be as strict as the guide hole 33 of the upper positioning plate 30. Further, as shown in FIG. 4, the lower positioning frame 23 uses a channel steel 28 to secure rigidity. FIG. 4 is a view taken in the direction of arrows CC in FIG.

[0009]

According to the present invention, attention is paid to the fact that a large diameter anchor steel rod has a high rigidity, and the upper and lower ends of the anchor steel rod are respectively provided near the upper and lower ends without using a large shaped steel frame. The precisely positioned upper and lower positioning plate is tightened with two upper and lower nuts, so it has a compact structure, does not interfere with the rebar, and has a highly accurate, economical and workable anchor structure. it can.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram of an anchor structure according to an embodiment.

FIG. 2 is a plan view of an upper positioning plate.

FIG. 3 is a plan view of a lower positioning plate.

FIG. 4 is a partial sectional view of a lower positioning plate.

FIG. 5 is a front view of a conventional anchor steel rod positioning frame.

FIG. 6 is a perspective view of FIG. 5;

FIG. 7 is an explanatory diagram of a pillar structure.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Anchor 11 Anchor steel rod 12 Sheath 13 Footing concrete 14 Launching surface 15 Discarded concrete 20 Lower positioning member 21 Nut 22 Support plate 23 Lower positioning frame 24 Lower nut 25 Height adjustment bolt 26 Steel rod guide hole 30 Upper positioning frame 31 Nut 32 Nut 33 Steel rod guide hole 100 Underground beam or foundation concrete 101 Anchor steel rod 102 Column 103 PC steel rod 104 Column cap 105 Tension anchorage 106 Column of next layer 107 Beam 110 Anchor steel rod positioning frame 111 Frame 112 Upper side Material 113 Positioning plate

Claims (3)

[Claims] 1. An anchor steel bar near the upper and lower ends, respectively.
An upper and lower positioning plate having an anchor steel rod positioning through hole is provided, and each anchor steel rod is tightened to the upper and lower positioning plates, and a rigid frame is formed by the anchor steel rod and the positioning plate. The anchor structure of the standing structure. 2. The anchor structure according to claim 1, wherein the upper positioning plate has a through hole having a small tolerance with respect to an outer diameter of the anchor steel bar. 3. The anchor structure according to claim 1, wherein the lower positioning plate is a frame made of a shaped steel.