JP3499754B2 - Steel column rebuilding device - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and a device for re-installing a temporarily fixed steel frame column built on a foundation concrete.

[0002]

2. Description of the Related Art Steel columns that form part of a building to be built are
Via a base plate attached to its bottom, it is placed on Tetsudango fixed to the foundation concrete,
After that, the base plate is fixed to the basic concrete by fixing the base plate with a plurality of anchor bolts extending from the basic concrete and a plurality of nuts that can be screwed into the anchor bolts. The temporarily fixed steel column is then corrected or modified in its construction.

[0003] Conventionally, the re-installation, which is the correction or correction of the re-installation, involves temporarily fixing the beams to a plurality of steel-framed columns temporarily fixed on the foundation concrete, and then using wire ropes previously fixed to the tops of the respective steel-framed columns. It was done by pulling.

[0004]

However, a space for performing the pulling operation of the wire rope is indispensable for the pulling operation of the wire rope, and the pulling operation of the wire rope makes it difficult to make fine adjustment for re-installing the steel column. There was a drawback.

It is an object of the present invention to eliminate the drawbacks of the conventional re-installation of a steel column due to the pulling of a conventional wire rope.

[0006]

DISCLOSURE OF THE INVENTION The present invention is mounted on a Tetsudango fixed to a foundation concrete, and is temporarily attached to the foundation concrete through a plurality of anchor bolts and a plurality of nuts screwed to the anchor bolts. Provided is a steel column restructuring device having a locked base plate .

The steel column restructuring device includes a frame having an upper portion and a lower portion, a bolt penetrating the upper portion of the frame and extending toward the lower portion of the frame, and arranged between the upper portion of the frame and the lower portion thereof. A nut screwed with the bolt and movable only in the axial direction of the bolt. Above the nut above the base plate
The edges of the base plate can be located, or the upper portion of the frame and the nut can receive and constrain the edges of the base plate therebetween .

[0008]

According to the present invention , the frame is placed on the concrete foundation and the steel column is mounted above the nut.
Raise the nut screwed onto the bolt by positioning the edge of the base plate or by receiving the edge of the steel column base plate between the top of the frame and the nut and rotating the bolt around its axis. The edge of the base plate can be lifted. The lifting of the edge of the base plate by the rotation of the bolt can be finely adjusted. Further, since the edge portion of the base plate is restrained between the upper portion of the frame and the nut, it is possible to prevent the steel column from tipping over during lifting.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION Referring to FIGS. 1 and 2, a steel column 10 forming a part of a building to be constructed is built on a foundation concrete 12 with an approximately vertical degree (building), and a base plate 14 described later is installed. It is temporarily fixed to the foundation concrete 12 via the.

The steel column 10 has a base plate 14 attached to the bottom thereof, and the base plate 14 is orthogonal to the axis of the steel column 10. The steel column 10 has a rectangular cross-sectional shape in the illustrated example, but may have another cross-sectional shape, for example, a circular cross-sectional shape.

The foundation concrete 12 is provided with a recess 16 having a rectangular planar shape that opens upward. The recess 16 has a bottom surface 18 which is a substantially horizontal flat surface.

The foundation concrete 12 also includes a Tetsudango 20 for adjusting the level of the steel column 10 and the steel column 1.
A plurality of (four in the illustrated example) anchor bolts 22 for fixing 0 to the foundation concrete 12 are embedded.

The tetsudango 20 projects from the center of the rectangular bottom surface 18 of the recess 16 and extends upward in the recess 16. The tetsudango 20 is made of concrete, mortar, or steel as in the illustrated example.

The four anchor bolts 22 are respectively
It projects from the four corners of the bottom surface 18 of the recess and extends upward outside the recess 16.

A base plate 14 having a generally rectangular planar shape, which is smaller in size than the bottom surface 18 of the recess, is received in the recess 16 and is mounted on the tetsudango 20. Further, the base plate 14 has anchor bolts 22 extending through four holes (not shown) provided at the four corners thereof, and nuts 24 (24) screwed into the anchor bolts 22.
₁ , 24 ₂ ) and is fixed on the foundation concrete 12. Thereby, the steel frame pillar 10 is temporarily fixed to the foundation concrete 12 via the base plate 14.

In addition to the example shown, the base plate 14 of the steel column 10 may be temporarily fixed on a flat foundation concrete having no recess 16. Also in this case,
Similarly, the base plate 14 is placed on a Tetsudango projecting upward from the flat surface of the foundation concrete, and the anchor plate projecting upward from the flat surface of the foundation concrete and the nut screwed to the anchor bolt are also interposed. It is temporarily stopped.

In each case, the steel column 1 temporarily fixed on the foundation concrete 12 via the base plate 14
0 and the base plate 14 are slightly tilted (see FIG. 2) and this tilt can be corrected or corrected, i.e. rebuilt, according to the invention as follows.

Reinstallation of the steel column 10 is carried out by the Tetsudango 2
The steel frame column 10 is rotated around each of the two straight lines L ₁ and L ₂ that extend on the lower surface of the base plate 14 through the contact points of 0 and the base plate 14 and are orthogonal to each other, that is, the tesdango 20 is a fulcrum, that is, the contact point is a fulcrum. , By making both straight lines L ₁ and L ₂ in a tilted state horizontal. In addition, the rotation of the steel column 10 is performed by the base plate 14
This is done by lifting the edge of the.

Prior to lifting the edge of the base plate 14, some nuts 24 on the side of the edge to be lifted are loosened. In the illustrated example, the base plate 14
Of the left and right edge portions 26, 28 facing each other, the right edge portion 26 at the lower height position is lifted up to
0 to rotate about the straight line L _1, loosen the two nuts 24 ₁ located on the right side of the straight line L ₁ as viewed in FIG. 1, moving these nuts 24 ₁ upward along the anchor bolt 22. This enables the relative movement of the base plate 14 with respect to the anchor bolt 22.

Next, when the other edge portion of the base plate 14, for example, the upper edge portion 30 in FIG. 1 is located at a height position lower than the lower edge portion 32 opposed thereto, the upper edge portion 3 is formed.
0 is lifted to loosen the _two nuts 24 ₁ and 24 ₂ which are some other nuts located above the straight line L _{2 in} FIG. 1 in order to rotate the steel column 10 around the straight line L ₂ . , These nuts 24 ₁ and 24 ₂ to the anchor bolt 2
Move upwards along 2. This similarly enables the relative movement of the base plate 14 with respect to the anchor bolt 22.

By the way, the base plate 14 is the steel column 1.
It is attached to 0 at right angles to its axis. From this, when the steel column 10 is in a vertical state when viewed from one point on the extension of the straight line L ₁ , the straight line L ₂ is in a horizontal state, and when the steel column 1 is viewed from one point on the extension of the straight line L _2.
When 0 is vertical, the straight line L ₁ is horizontal. Steel pillar 1
Each perpendicularity of 0 can be measured using, for example, a two-way transit.

According to the present invention, when both the straight lines L ₁ and L ₂ are horizontal, the axis of the steel column 10 becomes vertical,
The correction or correction of the verticality of the steel column 10 is completed.

The lifting of the edge of the base plate 14 is carried out by arranging a hydraulic jack, a screw jack or the like between the edge and the foundation concrete 12, and activating these jacks, or according to the present invention. This can be done using the device 34 shown.

The device 34 according to the invention comprises a frame 36.
And a bolt 38 rotatably supported on the frame 36
And a nut 40 retained within the frame 36 and screwed into the bolt 38.

The frame 36 includes a top plate 42 and a bottom plate 44, which are opposed to each other, and a top plate 42 and a bottom plate 44.
2 and a pair of side plates 46 fixed to the bottom plate 44 and facing each other, and a back plate 48 covering one of the rectangular openings defined by these plates 42, 44, 46.

The shaft of the bolt 38 is the top plate 4 of the frame.
2 extends through the base plate 44 toward the bottom plate 44 and its tip is in contact with the bottom plate 44. The nut 40 has a block shape as a whole and slidably contacts both side plates 46 and a back plate 48 of the frame. Therefore, when the bolt 38 is rotated around its axis, the nut 40 does not rotate together with the bolt 38, but both side plates 46 and the back plate 48 of the frame.
And moves up and down in the frame 36 along.

The top plate 42 and the nut 40 of the frame are
Each of the protrusions 5 protrudes to the side opposite to the back plate 48.
Has 0,52. These protrusions 50, 52 can receive the respective edges 26-32 of the base plate 14 between them and constrain them in the vertical direction.

In the example shown, each device 34 is arranged on the bottom surface 18 of the recess of the foundation concrete 12, with both projections 50, 52 between them of each edge 26 of the base plate.
-32 is accepted. Each device 34 is preferably
Placed on the straight line _L 1, _{L 2.} Also, in the illustrated example,
A wedge 54 is driven between each device 34 and the wall surface of the recess 16 in order to maintain the arrangement position of each device 34.

The lifting of the base plate edge 26, for example, by the device 34 is carried out as follows.

First, as shown in FIG. 2, the edge 26 at the lower level (the device 34 arranged along the edge 26
Edge 28, which is in contact with the protrusion 52 of the nut 40 and which is at an upper level and which faces the edge 26, is located above the nut 40 (of the device 34 arranged along the edge 28). So that the bolts 38 of both devices 34 are rotated about their axes ... (Operation 1).

Next, the bolt 38 of the device on the side of the edge 26 is rotated to raise the nut 40. As a result, the edge portion 26 is lifted via the protruding portion 52 of the nut 40. At this time, the edge portion 26 is restrained between the nut 40 and the projecting portions 50 and 52 of the top plate 42 of the frame, so that the steel column 10 is prevented from falling down (operation 2).

At this time, for example, the verticality of the steel column 10 is measured by using a vertical device. Since the rising distance of the nut 40 can be precisely controlled by rotating the bolt 38, the vertical accuracy of the steel column 10 can be made high. Further, at this time, the edge portion 26 has both nuts 2
4 ₁ without contact, and, as the edge 28 does not contact the projecting portion 52 of the nut 40 of the apparatus of said edge portion, the nut 24 ₁ screwed position pre bolt 3 against anchor bolts 22
Check the screwing position of the nut 40 with respect to 8 (operation 3).

Next, the above-mentioned operation 1-3 is performed on the base plate 1.
The same applies to the other edges 30 and 32 of the four opposite one another.

After that, the bolts 38 of the respective devices 34 on the side of the edge portion 28 and the side of the edge portion 32 are rotated, whereby the protrusion 52 of the nut 40 of each device 34 is moved to the respective edge portions 28, 32.
Abut. Then, the nut ₂₄ 1 screwed into each anchor bolt 22, 24 ₂ fastening with equal torque, completing the cycle construction of steel columns 10.

As shown in FIG. 4, when the weight of the steel column 10 is relatively high, the device 34 along each edge 26-32.
In place of the example shown in FIG. 1 to FIG.
It is possible to arrange a plurality, for example, two units each. However,
Preferably, as in the illustrated example, the devices 34 located along opposite edges of the device are opposed to each other. Also, a plurality of devices 34 arranged along each edge.
Operate simultaneously.

After the rebuilding of the steel column 10 is completed, each nut 40 is lowered by rotating the bolt 38 of each device 34, and then each device 34 is removed.

[Brief description of drawings]

FIG. 1 is a plan view of a steel frame column and a base plate before rebuilding and a rebuilding device arranged around them.

2 is a partial cross-sectional view taken along line 2-2 of FIG. 1, showing in cross-section only the foundation concrete and the building equipment.

FIG. 3 is a partial cross-sectional view similar to that shown in FIG. 2, showing a state where re-installation has been completed.

FIG. 4 is a schematic view showing another arrangement example of the re-installation device.

[Explanation of symbols]

10 Steel Column 12 Foundation Concrete 14 Base Plate 20 Tetsudango 22,24 Anchor Bolt and Nuts Threaded to It 26,28,30,32 Edge of Base Plate 34 Rebuilding Device 36 Frame 38 Bolt 40 Nut

Continued Front Page (72) Inventor Shuichi Nagataki 1 Tomiie-cho, Kanagawa-ku, Yokohama, Kanagawa 1 Kumagai Gumi Yokohama Branch (56) References JP-A-7-11773 (JP, A) JP-A-9- 189132 (JP, A) (58) Fields surveyed (Int.Cl. ⁷ , DB name) E04G 21 / 14-21 / 22

Claims (2)

(57) [Claims] 1. A steel column having a base plate mounted on a tetsudango fixed to a foundation concrete and having a base plate temporarily fixed to the foundation concrete through a plurality of anchor bolts and a plurality of nuts screwed to the anchor bolts. A frame having upper and lower parts, a bolt penetrating the upper part of the frame and extending toward the lower part of the frame, and a screw arranged between the upper part and the lower part of the frame and screwed on the bolt. And a nut that is movable only in the axial direction of the bolt, and the edge portion of the base plate can be disposed above the nut. 2. A steel frame column having a base plate mounted on a tetsudango fixed to a foundation concrete and temporarily fixed to the foundation concrete through a plurality of anchor bolts and a plurality of nuts screwed to the anchor bolts. A frame having upper and lower parts, a bolt penetrating the upper part of the frame and extending toward the lower part of the frame, and a screw arranged between the upper part and the lower part of the frame and screwed on the bolt. And a nut that is movable only in the axial direction of the bolt, the upper part of the frame and the nut being able to receive and constrain the edge of the base plate between them. Rebuilding device.