JP3631552B2 - Upper centering device for guide pipe for construction of true pillar - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an upper centering device for a guide tube for erected a pillar.
[0002]
[Prior art]
Set the square cross-section guide tube suspended in the pile hole in a predetermined direction and vertically, and then drop the stem column into the guide tube in such a state to guide it on the inner surface of the guide tube. A construction method for erection of a structural pillar that ensures the orientation and verticality of the structural pillar is already known from Japanese Patent Laid-Open No. 6-65924.
[0003]
This construction method using the guide pipe is a construction method that allows the accuracy of the construction column to be easily secured, and is embedded in a concrete pile placed in advance in the pile hole. As shown in FIG. 12, a guide pipe B made of a steel pipe having a square cross section that has a larger cross section than the structural pillar A and has no fear of bending is provided in the pile hole F as shown in FIG. It is characterized in that the orientation and verticality of the construction pillar A can be secured only by dropping the construction pillar A along the inner surface by installing it with high accuracy in the vertical direction.
[0004]
In the figure, E is a casing having a circular cross section built in a pile hole in advance, D is a Yatco (built-in auxiliary jig) having the same cross-sectional shape connected to the upper part of the structural pillar A, and H is a guide tube B. The upper centering device, J, is a lower centering device for the guide tube B, and is composed of four jacks 9 and the like that are horizontally attached to the four outer circumferential surfaces on the lower side of the guide tube B. K is a verticality measuring device equipped on the side surface of the guide pipe B. A float connected to the center of the bottom surface of the water pipe by a string-like member is arranged inside the water pipe filled with water, and is attached to the upper end of the water pipe. A transparent window with a mark is provided.
[0005]
[Problems to be solved by the invention]
By the way, in the above-described conventional example, the upper centering device H for the guide tube is mounted on the platform 11 in which the height can be adjusted horizontally by the jack 10 and the upper surface can be adjusted horizontally. Since the main girder 20a, 20b and the sub girder 21a, 21b are fixed, there are the following drawbacks.
[0006]
(1) Four girder members are required for assembling main girder 20a, 20b and sub girder 21a, 21b on the frame 11 in the shape of a cross girder to define the direction and core of the guide tube B. As the girders, H-shaped steel is usually used and has a considerable weight. Therefore, if the number of girders used is large, it is disadvantageous for lifting and small transport on site.
[0007]
{Circle around (2)} Since the four girder members are assembled in the form of a cross girder to define the direction and core of the guide tube B, the centering operation of the upper portion of the guide tube B is complicated.
[0008]
Incidentally, in the conventional upper centering apparatus H, the centering operation of the upper part of the guide tube B is performed according to the following procedure.
[0009]
First, as shown in FIGS. 13A and 13B, the gantry 11 is installed on the work floor I corresponding to the upper part of the cane sig E, and the upper surface of the gantry 11 is horizontally adjusted by a jack (not shown). After that, marking is performed on the upper surface of the gantry 11 and a mark a is attached to the position where the main beam is to be placed.
[0010]
Thereafter, as shown in FIG. 13C, the guide tube B is suspended in the casing E using a lifting machine.
[0011]
In this state, as shown in FIGS. 13D and 13E, two main girders 20a and 20b were placed on the gantry 11, and only one main girder 20a was put on the gantry 11. The two main girders 20a, 20b are fixed after fixing the other main girder 20b to the gantry 11 with the same means in accordance with the mark a and fixing it with a vise clamp metal fixture 22 or the like. Ink is printed on the upper surface of the sheet and a mark b on which the sub beam is to be placed is attached.
[0012]
Next, as shown in FIGS. 14A and 14B, the first sub-girder 21a is placed on the two main girders 20a and 20b in accordance with the mark b, and the sub-girder 21a is placed. Is fixed to one fixed main girder 20a with a vise clamp metal 23 or the like.
[0013]
In this state, the suspended guide tube B is moved in the horizontal direction so that the corners of the guide tube B are fixed to the main beam 20a fixed to each other as shown in FIG. The direction and the core of the guide tube B are defined by being applied to the corner with the sub-girder 21a.
[0014]
Next, as shown in FIG. 14D, the temporarily fixed main girder 20b is applied to the side surface of the guide tube B and fixed (mainly fixed) to the sub girder 21a and the gantry 11 by the same means.
[0015]
Thereafter, as shown in FIG. 14E, the two sub beams 20a and 20b are placed with the remaining sub beams 21b placed on the main beams 20a and 20b and applied to the side surfaces of the guide tube B. It is fixed by the same means.
[0016]
The present invention eliminates the above-mentioned conventional drawbacks, and its purpose is to halve the number of girders used so that the centering operation of the upper portion of the guide tube can be performed easily and quickly. An object of the present invention is to provide an upper centering device for a guide pipe for erection of a structural pillar.
[0017]
[Means for Solving the Problems]
In order to solve the above-described problems, in the present invention, positioning members having fitting surfaces perpendicular to each other are provided on opposite side surfaces of two girders, and these positioning members are arranged in the diagonal direction of the guide tube. It is made to fit in a corner part.
[0018]
DETAILED DESCRIPTION OF THE INVENTION
The present invention relates to a gantry whose upper surface can be adjusted horizontally, and fitting surfaces that are perpendicular to each other and fitted to diagonal corners of a guide tube having a square cross section on a side surface that is mounted and fixed to the gantry. It can be implemented in the form of an upper centering device of a guide tube for erection of a structural pillar comprising two girder members to which positioning members having a fixed shape are fixed.
[0019]
【Example】
Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows a concrete pillar A made of a steel frame having a cross-shaped cross-section, dropped into a guide pipe B made of a steel pipe having a square cross section (square), in a predetermined direction and vertically, and a cast-in-place concrete pile The state immediately after being built in is shown in the state rooted in C. D in the figure is a Yatco (built-in auxiliary jig) having the same cross-sectional shape as the built-up column A connected to the upper end of the built-up column A, and E is a circular wall-shaped hole wall protection built in the pile hole F in advance. Casing, G is a hole wall stabilizing liquid, H is an upper centering device installed on a work floor (consisting of discarded concrete, etc.) I corresponding to the upper part of the casing E, J is a lower side of the guide tube B A lower centering device K is provided, and K is a verticality measuring device provided on the side surface of the guide tube B. L is a jack that supports the Yatsuko D, and M is a jack receptacle.
[0020]
As shown in FIG. 2, the construction column A has a cross H-shaped cross section, and an erection piece 2 is fixed to the outer surface of the four flanges 1a on the upper end side by welding or the like, and on the lower end side. Two wing plates 3 are fixed to the outer surface of each flange 1a by welding or the like. 4 is a close fitting spacer fixed to the outer surface of the flange 1a of the structural pillar A by welding or the like, and is provided in upper and lower stages (three stages in the illustrated example) at intervals shorter than the length of the guide tube A. . This tightly fitting spacer 4 is constituted by a flat bar having both ends cut into a square shape at an angle of 45 degrees, and both ends are guided by the inner surfaces adjacent to each other at right angles to the guide tube A. It has become. In order to reduce the tight fitting spacer 4 and its mounting work, the tight fitting spacer 4 is provided only on the two opposing flanges 1a among the four flanges 1a.
[0021]
As shown in FIGS. 3A and 3B, the guide tube B has a pair of brackets 5a and 5a protruding diagonally on the upper outer side portion, and the bracket 5a and 5a through which the It is supported by the upper centering device H. As shown in FIG. 1, each bracket 5a is formed with a shackle locking hole 6 used when the guide tube B is suspended and supported in a vertical posture by a lifting machine. 3a shown in FIG. 3 is a reinforcing band fixed in a state surrounding the outer periphery of the upper end of the rectangular steel pipe 7 which is a main component of the guide pipe B, and 7b is an upper end flange. Reference numeral 8 denotes a locking metal fitting used when the guide tube B is lifted sideways for transportation or the like.
[0022]
The lower centering device J is configured by attaching four jacks 9 that can be expanded and contracted in the horizontal direction by remote control from the ground to the center of each side of the guide tube B. The verticality measuring device K has a transparent window with a mark at the upper end of a water pipe, in which a float connected to a central part of the bottom surface of the water pipe by a string-like member is arranged inside a water pipe parallel to a guide pipe B filled with water. Is provided. The verticality measuring device K shown in the figure has a length similar to that of the guide tube B, and thus is attached to the one side of the guide tube B so as not to come into contact with the jack 9.
[0023]
As shown in FIGS. 4 to 6, the upper centering device H has an opening frame shape and can be adjusted in height and the upper surface can be adjusted horizontally by four jacks 10. It consists of two girder members 12 and 13 that are mounted and fixed to the frame. Each girder 12 and 13 is made of an H-shaped steel cut to an appropriate length, and is perpendicular to each other at the center of the opposite side surfaces and fitted to the diagonal corners of the guide tube B. Positioning members 12a and 13a having a fitting surface c and having a substantially M shape in plan view are fixed by means such as welding. 12b and 13b are brackets for lifting the beam members 12 and 13 welded to the upper flange.
[0024]
If the upper centering device H having the above configuration is used, the position in the two directions of the guide tube B can be defined by one girder. Therefore, after the level adjustment of the upper surface of the gantry 11, the ink is applied to the upper surface of the gantry 11. When one girder 12 is placed and fixed at a predetermined position, specifically, as shown in FIG. 7A, the girder 12 is placed on the gantry 11 and the positioning member 12a. The center is positioned on the coordinate axis X of the true pillar aligned with the core of the building, and the side surface of the beam 12 is parallel to the coordinate axis Y of the true pillar and at a predetermined distance from the coordinate axis Y. Is fixed to the gantry 11 with a vise clamp metal or the like, as shown in FIG. 7 (B), the guide tube B is simply fitted into the positioning member 12a to guide the guide. The orientation and core of tube B will be defined.
[0025]
Therefore, the other one girder 13 placed on the gantry 11 is moved to the guide tube B side, and the positioning member 13a is moved in the diagonal direction of the guide tube B as shown in FIG. The centering operation of the upper part of the guide tube B is completed by fitting the corner member 13 in this state and fixing the girder 13 to the gantry 11 in the same manner.
[0026]
In the above-described embodiment, as shown in FIGS. 6 to 8, the guide tube B is 45 degrees with respect to the coordinate axes X and Y of the construction pillar A whose sides are aligned with the core of the building. The upper centering device H of the present invention is set in a rotated positional relationship, but the guide tube B is aligned with the coordinate axes X and Y of the construction column A as shown in FIG. The present invention can also be applied to a case where two sides perpendicular to each other are installed in a state parallel to the coordinate axes X and Y).
[0027]
10 and 11 show another embodiment of the present invention. In this embodiment, positioning members 12a and 13a made of short H-shaped steel or the like are arranged on the opposite side surfaces of the beam members 12 and 13 and shifted to one end side in the longitudinal direction. The upper centering device H is characterized by being fixed in a state perpendicular to the longitudinal direction of 12,13.
[0028]
As shown in FIG. 11, the upper centering device H is suitable for installation in a state where the guide tube B having a square cross section is aligned with the coordinate axes X and Y of the construction pillar A aligned with the core of the building. used. In this case, the side surfaces of the beam members 12 and 13 and the one side surface of the positioning members 12a and 13a constitute the fitting surface c that fits the corners in the diagonal direction of the guide tube B. Further, in this case, the brackets 5a and 5a on the upper portion of the guide tube B supported by the beam members 12 and 13 protrude in a direction perpendicular to the respective sides from the center portions of the two opposite sides of the guide tube B. Will be provided.
[0029]
【The invention's effect】
As described above, according to the present invention, since the position of the guide tube in two directions can be defined by one girder, the number of beams used is halved and the center of the upper portion of the guide tube is determined. There is an effect that the work can be performed easily and quickly.
[Brief description of the drawings]
FIG. 1 is a longitudinal side view showing an embodiment of an upper centering device for a guide tube for erected a pillar according to the present invention.
FIG. 2 is a perspective view of a structural pillar.
3A is a perspective view of a guide tube, and FIG. 3B is a plan view of the guide tube.
FIG. 4 is a perspective view of an upper centering device.
FIG. 5 is a perspective view of a girder used in the upper centering device.
FIG. 6 is a partially cutaway plan view of the main part showing a state in which the guide tube is supported by the upper centering device and the construction pillar is dropped into the guide tube.
FIG. 7 is an explanatory diagram of the operation of the upper centering device.
FIG. 8 is a schematic plan view showing an example of use of the upper centering device.
FIG. 9 is a schematic plan view showing another example of use of the upper centering device.
FIG. 10 is a perspective view of a girder used in an upper centering apparatus showing another embodiment of the present invention.
FIG. 11 is a schematic plan view of an upper centering device showing another embodiment of the present invention.
FIG. 12 is a longitudinal side view for explaining a conventional example.
FIG. 13 is an explanatory diagram of a centering operation of an upper portion of a guide tube according to a conventional example.
FIG. 14 is an explanatory diagram of a centering operation following the step of FIG. 13;
[Explanation of symbols]
B ... Guide tube,
H ... Upper centering device,
c ... mating surface,
11 ... Stand,
12, 13 ... Girder,
12a, 13a ... positioning members.

Claims (1)

Positioning member having a base capable of adjusting the upper surface horizontally, and fitting surfaces perpendicular to each other, which are mounted and fixed on the base and are fitted to diagonal corners of a guide tube having a square cross section on opposite sides. An upper centering device for a guide tube for erection of a built-in column, comprising two girders to which is fixed.

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