JPH0674701U - Pillar embedding device - Google Patents

Abstract

(57) [Summary] [Purpose] To provide a column base embedding device with improved workability and construction accuracy of a steel frame column. [Structure] A level adjusting nut 4 and a bolt 5 are provided on a bottom surface of a column base embedding hole 3 formed in advance in the underground beam 2 on the upper surface of the foundation 1.
And a guide anchor 6. The base plate 12 of the steel column base 11 is provided with a hole portion 13 into which the guide anchor 6 is loosely fitted, and nuts 14 and 15 that are orthogonal to each other near each diagonal position are provided on the side surface facing the vicinity of the open end of the hole wall. Stuck,
The nuts 14 and 15 each have a construction adjustment bolt 1
Screw 6 and 17 together. When the guide anchor 6 is inserted into the hole 13 of the base plate 12 of the column base 11 and seated on the bolt 5, both horizontal and vertical positions are determined. Pedestal 11
The head of one of the bolts 16 and 17 is pressed against the hole wall to adjust the orientation of the steel column 10, and the heads of the two bolts facing the hole wall are pressed against the hole wall to contact the steel column 10. Adjust the tilt of. The space between the column base 3 and the hole wall is filled with concrete.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a column base embedding device with improved workability and construction accuracy in constructing steel columns.

[0002]

[Prior art]

 In the steel frame structure designed by fixing the column base, as a method of constructing the steel frame column after completion of the underground beam frame on the upper surface of the foundation, the column base is inserted into the hole made by removing the core in advance in the underground beam. A device for fixing by mortar filling has been developed in recent years, and for example, a device described in Japanese Utility Model Publication No. 1-15763 has been proposed. In the column base fixing device of the same publication, a column base with a shear connector attached to the side is inserted into a column insertion hole formed in the foundation in advance, and the side face of the column base and the top end of the foundation are connected by a metal fitting for positioning. The column base is fixed by filling the gap with the insertion hole with mortar.

[0003]

[Problems to be solved by the device]

 When the steel column is erected using the above-mentioned column base fixing device, the column base can be fixed after the steel frame has been formed to some extent, which shortens the construction period and also installs the shear connector on the column insertion hole and the side surface. Since the mortar is filled in the space between the base and the base, there is an advantage that the anchor bolts for mounting the base plate are not required.

However, in the above-mentioned device, the nut tightening between the positioning hardware attached to the side surface of the column base and the anchor bolt protruding from the top end of the foundation is applied to the column base that is easily shaken while being suspended. Not only is there a problem that it will be difficult to carry out the construction, it is also not possible to secure precise construction accuracy because there is no mechanism necessary for the adjustment of the steel frame column construction. There's a problem.

An object of the present invention is to solve such a problem and to provide a column base embedding device having good workability and high construction accuracy.

[0006]

[Means for Solving the Problems]

 In order to achieve the above-mentioned object, the present invention provides a level adjusting material and a guide anchor on the bottom of a column base embedding hole previously formed in an underground beam constructed on the upper surface of the foundation, and the base plate of the steel column base has the above-mentioned structure. A hole is provided in which the guide anchor is loosely fitted, and at a diagonal position of the hole wall near the opening end of the column base embedding hole, it is moved forward and backward in directions orthogonal to each other so that one end can abut the hole wall. The nut with the insertion adjustment bolt screwed is fixed to the corresponding side surface of the column base, and the column base is fixed by concrete filling the space between the column base embedding hole and the column base. is there.

[0007]

[Action]

 When constructing a steel frame column using the column base embedding device of the present invention, the steel frame column is hung and inserted into the column base embedding hole formed in the underground beam, and the While inserting the guide anchor at the bottom of the hole into the hole of the base plate, seat the base plate on the level adjustment material. As a result, the horizontal core position and the vertical level of the steel column can be accurately determined.

The adjustment of the steel frame column is carried out by using the building adjustment bolts attached to each side surface of the column base. To adjust the orientation of the steel column in the column row direction, for example, only one end (head) of one of the bolts orthogonal to the hole wall on one side of the column base parallel to the column row in the X direction should be paired. It is brought into contact with the facing hole wall and rotated in the backward direction around the axis. As a result, the steel column rotates in a direction opposite to the backward direction of the bolt with the guide anchor inserted in the base plate as a fulcrum, and the direction of the column row in the X direction is adjusted to one side.

The tilt of the steel column is adjusted by, for example, bringing one end (head) of both bolts, which are orthogonal to the hole wall, on one side surface of the column base parallel to the Y direction into contact with the facing hole wall. Rotate in the backward direction. As a result, the steel column is tilted in the X direction, which is the opposite direction to the backward direction of the bolt, while being supported by the guide anchor inserted through the base plate. After the installation adjustment is completed, rotate all of the installation adjustment bolts so that one end (head) of the installation adjustment bolt comes into contact with the hole wall, and in this state, the space between the hole and the wall is filled with concrete.

[0010]

【Example】

 An embodiment of the present invention will be described below with reference to the drawings. As shown in FIG. 1, on the upper surface of the foundation 1 on which the steel columns 10 are to be erected, the skeleton construction of the underground girder 2 is performed before the erection, and when the underground girder 2 is concrete-cast in advance, The formwork is set at a fixed position of the column base 11 of the steel frame column, and the column base embedding hole 3 having a square cross section is formed.

On the bottom surface of the column base embedding hole 3 of the underground beam 2, bolts 5 are screwed to nuts 4 which are planted at four locations corresponding to diagonal points of a square, as shown in FIG. I am doing it. The nut 4 and the bolt 5 have a function as a level adjusting material for the steel frame column 10. Further, a guide anchor 6 having a needle-like tip is vertically projected and implanted at the core position of the steel column 10 in the column direction (center of the square) in the bottom of the hole. The guide anchor 6 has a function as a horizontal positioning member for the steel column 10 and an auxiliary member for adjusting the construction.

The steel column 10 shown in FIG. 1 is made of square steel, and the base plate 12 of the column base 11 has a diameter such that the guide anchor 6 of the column base embedding hole 3 is loosely fitted. The hole 13 is provided at the center position. In addition, on each side surface of the column base 11, nuts 14 and 15 in which the centers of the screw holes are orthogonal to each other are in contact with the diagonal positions of the portion corresponding to the hole wall near the opening end of the column base embedding hole 3. Are welded and fixed in two upper and lower stages, and nuts 14 and 15 are screwed with bolts 16 and 17 whose head faces the hole wall side so as to be able to move forward and backward. When the bolts 16 and 17 are rotated in the backward direction about their axes, their heads have a shaft portion whose length contacts the hole wall. These bolts 16 and 17 and nuts 14 and 15 are It has a function as a building adjustment member for steel columns (see Figs. 3 and 4).

Further, a shear connector 18 is attached to each side surface of the column base 11. The shear connector 18 has a function as an anchor bolt for fixing a column base. The procedure for erection of the steel column 10 having the column base 11 having the above-described configuration is as follows.

The bolt 5 on the bottom surface of the column base embedding hole 3 formed in the underground beam 2 has a screwing length adjusted with respect to the nut 4, so that the level at which the head top surfaces of the bolts 5 are connected to each other has a predetermined level. Adjust to form a horizontal plane in the vertical position. While lowering the steel column 10 suspended above the underground beam 2, the column base 11 is inserted into the column base embedding hole 3, and the hole 13 of the base plate 12 of the column base 11 is inserted into the guide anchor 6 at the bottom of the hole. The base plate 12 of the column base 11 is seated on the head of the bolt 5 at the bottom of the hole in this state.

Next, the building adjustment of the direction and the inclination of the steel column 10 in the column row direction is performed. When adjusting the column direction of the steel column 10, for example, the direction of the X direction in FIG. 3, of the installation adjustment bolts 16 and 17 of the column base 11, mount them so that they face each other in the Y direction orthogonal to the X direction. Rotate either one of the left and right bolts in the figure, such as bolt 17a, in the backward direction around its axis on one side to bring the head into contact with the hole wall facing it, as shown in FIG. Let The heads of the bolts other than the bolt 17a are separated from the respective facing hole walls, and in this state, the bolt 17a is further rotated in the backward direction. As a result, a reaction force of the pressing force of the bolt 17a against the hole wall acts as a couple around the guide anchor 6 inserted in the base plate 12 as a fulcrum on the steel frame column 10, so that it rotates in the direction of arrow C in FIG. To do. Instead of the bolt 17a, a bolt 17c located diagonally thereto may be used to perform the above operation. When rotating the steel column 10 in the direction opposite to the C direction, one of the bolts 17b and 17d is used. In this way, the flatness of the side surface of the steel column 10 in the X direction is adjusted.

When adjusting the direction of the steel frame column 10 in the Y direction, one of the bolts 16a and 16c or one of the bolts 16b and 16d is used to guide the steel frame column 10 in the same manner as described above. Rotate around anchor 6. When adjusting the inclination of the steel column 10, for example, the inclination in the X direction in FIG. 3, one of the installation adjustment bolts 16 and 17 of the column base 11 which is attached facing the X direction. Both bolts, such as the bolt 16a and the bolt 16d, are rotated about their axes in the backward direction to bring the head into contact with the hole wall facing the head. The heads of the bolts other than the bolts 16a and 16d are separated from the respective facing hole walls, and in this state, the bolts 16a and 16d are further rotated by an equal amount in the backward direction. As a result, the steel frame column 10 is supported by the guide anchor 6 inserted through the base plate 12, and tilts in the direction of arrow D in FIG. 3 due to the horizontal reaction force of the pressing force of the bolts 16a and 16d against the hole walls. When inclining the steel column 10 in the direction opposite to the D direction, the bolts 16b and 16c are used. In this way, the inclination of the steel column 10 in the X direction is adjusted.

When adjusting the inclination of the steel column 10 in the Y direction, the bolts 17a and 17b, or the bolts 17c and 17d are used to perform the same operation as described above. In the steel column 10 for which the installation adjustment has been completed in this manner, all the heads of the installation adjustment bolts 16 and 17 are brought into contact with the facing hole walls to temporarily fix the steel column 10, and in this state, By filling the space 20 between the hole wall and the concrete, the column base 11 is permanently fixed to the underground beam 2.

FIG. 5 shows an embodiment of a column base 11 of a steel frame column made of H-shaped steel, in which nuts whose center of a screw hole is orthogonal to each end face and each edge of the opposing flange portion 19 are provided. , 15 are fixed to the upper and lower two stages by welding, and bolts 16 and 17 for installation adjustment are screwed into these nuts 14 and 15. In the above embodiment, the guide anchor 6 implanted in the bottom surface of the column base embedding hole 3 of the underground beam 2 is shown as having a relatively short length. The length may be set arbitrarily, and may be a length protruding above the top end of the underground beam 2 as necessary.

Further, the bolts 5 and the nuts 4 as the level adjusting material provided on the hole bottoms of the column base embedding holes 3 may be replaced with cement mortar having an appropriate thickness. Further, the shear connector 18 attached to the side surface of the column base 11 of the steel frame column 10 may be omitted if necessary.

[0020]

[Effect of device]

 As described above, according to the present invention, the level adjusting material and the guide anchor are provided in the column base embedding hole, and the guide anchor loose fitting hole is provided in the base plate of the column base. Since the installation adjustment bolts are screwed into the nuts fixed to the side of the column base facing the hole wall near the opening end of the column base, the base plate of the column base is installed in the column base embedding hole when building the steel column. When it is seated on the bottom of the hole, the horizontal center position and the vertical level of the steel frame columns are not only accurately determined at the same time, but also the direction and inclination in the column direction can be easily determined by the installation adjustment bolts. Since it can be adjusted by various operations, it is possible to obtain a column base embedding device that has good workability and is capable of erection of steel columns with high construction accuracy.

[Brief description of drawings]

FIG. 1 is a vertical sectional view showing an embodiment of the present invention in a state before being embedded in a column base.

FIG. 2 is a plan view showing a hole bottom of a column base embedding hole in FIG.

FIG. 3 is an enlarged cross-sectional view taken along the line I-I of FIG.

FIG. 4 is a partial vertical cross-sectional view showing a usage state of a construction adjustment bolt.

FIG. 5 is a cross-sectional view showing another example of the column base of the present invention.

[Explanation of symbols]

 1 Foundation 2 Underground Beam 3 Hole for Embedding Column Base 4 Nut 5 Bolt for Level Adjustment 6 Induction Anchor 10 Steel Column 11 Column Base 12 Base Plate 13 Holes 14, 15 Nut 16, 17 Construction Adjustment Bolt 20 Void

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Norio Tsubaki 1-25-1 Nishi-Shinjuku, Shinjuku-ku, Tokyo Taisei Corporation

Claims (1)

[Scope of utility model registration request] 1. A level adjusting material and a guide anchor are provided on the bottom surface of a column base embedding hole previously formed in an underground beam constructed on the upper surface of the foundation, and the guide anchor is loosely fitted to the base plate of the steel column base. And a side wall of the column base corresponding to the hole wall in the vicinity of the opening end of the column base embedding hole, the one end of the hole wall is moved forward and backward in directions orthogonal to each other at each diagonal position. A nut that is screwed into a building adjustment bolt that can contact the wall is fixed, and the column base is fixed by concrete that fills the space between the column base embedding hole and the column base. Column base embedding device characterized by.