JPH0696849B2 - Frame device for construction of true pillar - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gantry device for constructing a structure column which is constructed integrally with a cast-in-place reinforced concrete foundation pile and whose upper portion is joined to the steel frame of a structure.

[0002]

2. Description of the Related Art Construction of a structural column that is constructed integrally with cast-in-place reinforced concrete foundation piles and joins the upper part to the steel frame of the structure has been conventionally done by using a crane or the like in the pile holes of cast-in-place reinforced concrete foundation piles at the bottom. Suspend the structure column, support the upper part of the structure column on the gantry installed at the mouth of the pile, and move the wire tied to the gantry by pulling it horizontally in the jack fixed to the ground. In addition to horizontal positioning, a vertical mount attached to the top of the true pillar or a string attached from the lower end of the true pillar to float on the mud surface of the pile hole The underwater hydraulic jack is operated from the ground to perform vertical centering, after which concrete is placed in the pile hole, and a true pillar is constructed integrally with the foundation pile.

[0003]

However, the above-described conventional method of constructing a false column has a problem that it takes a lot of time to perform horizontal positioning and vertical centering, and sufficient accuracy cannot be obtained. In view of the above-mentioned conventional problems, the present invention has been made as an object to improve this, in constructing the true post, extremely easily and accurately positioning the true post horizontally, and It is an object of the present invention to provide a gantry device for constructing a true pillar that can perform vertical centering.

[0004]

In order to achieve the above-mentioned object, the present invention is installed at a pile mouth of a foundation pile for constructing a true pillar,
The upper part of the guide pipe for building and guiding the true column is freely suspended and supported by the gimbal at the center of the positioning stand whose position can be adjusted in all horizontal directions by the horizontal adjustment bolts on the outer circumference. The upper surface is provided with a fixing portion for fixing the tip end portion of the horizontal crosswise vertical fixed arm attached to the upper end portion of the guide pipe. It features a gantry device for constructing a true pillar in which a stigma level setting post for setting the level is provided so as to be adjustable up and down.

[0005]

[Operation] Horizontal positioning of the structure columns to be installed in the foundation pile hole can be easily done by screwing back and forth the horizontal adjustment bolts of the positioning frame that can adjust the position in all horizontal directions. The vertical centering is achieved by automatically suspending the guide pipe that guides the construction of the true pillar by hanging the upper part through the gimbal to the center of the gantry and automatically hanging it vertically on the principle of plumb bob. The vertical column is guided by the guide pipe without needing any vertical detection means such as vertical or floating means and positioning means such as jacks. It is attached to the upper end of the guide pipe, and it shows the tilt of the guide pipe in an enlarged manner. Retained. In addition, by setting the height of the stigma level setting post to a predetermined height of the true pillar, the stigma of the true pillar without having to measure the height of the true pillar each time the true pillar is built. The height can be automatically set to a predetermined value.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail below with reference to an embodiment shown in the drawings. 1 and 2, reference numeral 1 is a gantry device for constructing a true post (hereinafter referred to as a gantry device) according to the present invention. The gantry device 1 is a positioning gantry 2, a vertical fixed arm 3, a guide pipe 4, and a stigma. The positioning base 2 is composed of a level setting post 5 and the like, and is horizontally supported on a circular iron plate 6 through a large number of ball bearings 7 and is provided on the outer peripheral portion of the iron plate 6. 8 can be screwed back and forth to be positioned horizontally.

The guide pipe 4 is supported in the center hole 2a of the positioning base 2 via a gimbal 9. The gimbal 9 is a known one applied to a gyroscope or the like, and as shown in FIG. 3, two axes 9c and 9d in two directions orthogonal to each other are provided on the outer side and the inner side of the outer ring 9a, and the outer axis 9c is provided. Is pivoted to the center hole 2a of the positioning base 2 and the inner shaft 9d is pivotally mounted to the inner ring 9b fitted to the guide pipe 4, so that the guide pipe 4 is always supported when the positioning base 2 is inclined in any direction. It is designed to hang vertically on the principle of plumb bob.

The vertical fixed arm 3 is a horizontal cross-shaped arm fixed to the upper end of the guide pipe 4, and a fixing portion 10 for fixing the positioning base 2 is provided at the tip of the arm.
As shown in FIG. 4, the fixing portion 10 is an angle pillar 10c that is erected on the upper surface of the positioning base 2 by means of two opposing fixing bolts 10b screwed into two opposing brackets 10a fixed to the ends of the arms. The vertical fixing arm 3 can be fixed to the positioning base 2 by sandwiching one side thereof. Further, the stigma level setting post 5 can adjust the upper surface height by adjusting the level adjusting bolt 5a.

Next, an example of a method of constructing a steel tube concrete structural column using the above-mentioned gantry device 1 will be described with reference to FIGS. 5 to 10. When constructing a structural column, first, a foundation pile hole 11 for construction of cast-in-place reinforced concrete foundation pile is excavated by a known mud circulation method, etc., a reinforcement cage 12 is hung at the bottom of the hole, and a tremie pipe 13 is used. The foundation pile concrete 14 is placed (Fig. 5).

After that, the gantry device 1 for constructing the true post is installed on the ground of the pile hole 11a, and the height of the upper surface of the stigma level setting post 5 is adjusted by adjusting the level adjusting bolt 5a. The horizontal adjustment bolt 8 is screwed on the outer circumference of the positioning stand 2 while setting the height of the stigma and measuring the two positioning indexes 15 (Fig. 2) provided on the upper surface of the stigma level setting post 5 with a laser measuring machine. The positioning base 2 is moved back in the horizontal direction so that the axis of the guide pipe 4 is exactly aligned with the predetermined position. The verticality of the guide pipe 4 automatically comes out by the gimbal 9 supporting the guide pipe 4, so if both ends of the vertical fixing arm 3 are fixed by the fixing portions 10, the guide pipe 4 is accurately fixed vertically at a predetermined position. (Fig. 6).

Next, the hollow steel pipe column 1 with the bottom plate 16a 'attached
6'is hung by a hanging jig 17, and the hollow steel pipe column 16 'is inserted into the guide pipe 4 in which the spacer 18 is inserted so as to align the shaft centers of the guide pipe 4 and the hollow steel pipe column 16'. Concrete is poured into the steel pipe pillar 16 ', and the hollow steel pipe pillar 16' is allowed to descend in the guide pipe 4 in a state where the weight increase of the concrete 19 that is sequentially filled against the increase in buoyancy caused by the descending wins. (Fig. 7).

Then, after the lower end of the hollow steel pipe pillar 16 'reaches the foundation pile concrete 14, the panel zone of the beam (reference numeral 22 in FIG. 10) joined to the column head of the constructed true pillar (reference numeral 16 in FIG. 10). The lower end of the hollow steel pipe column 16 'is sunk into the uncured foundation pile concrete 14 by the weight of the concrete 19 filled to the lower part, and the upper end of the hollow steel pipe column 16' matches the upper surface of the stake level setting post 5 of the gantry device 1. At that point, the descent is stopped and the upper end is deposited in the stigma level setting post 5. After stabilizing the foundation pile concrete 14 and the filled concrete 19 of the hollow steel pipe pillar 16 ', the hanging jig 17, the gantry device 1, the guide pipe 4 and the like are removed, and the pillar head of the hollow steel pipe pillar 16' is made into the pile hole opening 11a. It is temporarily fixed by the fixing jig 20 (FIG. 8).

Next, the soil mortar 21 made of the excavated soil discharged during the excavation of the foundation pile hole 11 is filled in the hollow steel pipe column 16 'outer peripheral pile hole to replace the muddy water in the foundation pile hole 11 (FIG. 9). .

After curing the soil mortar 21, the fixing jig 2
0 is removed and the hollow steel pipe columns 16 'are installed and modified by using the ground surface to complete the true structural columns 16 and the beams 22 are joined to the panel zones of the beams above the true structural columns 16 (Fig. 10). .

[0015]

As described above, in the gantry device for constructing the true post of the present invention, the horizontal positioning of the true post to be built is performed by using the horizontal adjustment bolts of the gantry for position adjustment in all horizontal directions. It can be done by screwing back and forth, and vertical centering can be done by vertically hanging the guide pipe that guides the construction of the structure through the gimbal and suspending it vertically from the center of the mount. By automatically hanging vertically according to the principle of, the vertical of the true column guided by the guide pipe without the need for any vertical detecting means such as a vertical mount or floating and positioning means such as a jack is provided, The guide pipe that comes out vertically is attached to the upper end of the guide pipe, and it shows the tilt of the guide pipe in an enlarged manner. , With guide pipe構真 column is held exactly vertically hits the building 構真 column, very easily, and out horizontal position accurately 構真 posts, and can perform vertical centering. In addition, by setting the height of the stigma level setting post to a predetermined height of the true pillar, the height of the true pillar does not need to be measured when the true pillar is built. The height can be automatically set to a predetermined value,
And so on.

[0016]

[Brief description of drawings]

FIG. 1 is a side sectional view of a gantry device for constructing a true column according to the present invention.

FIG. 2 is a plan view of the gantry device.

FIG. 3 is a plan view of a gimbal.

FIG. 4 is a perspective view of a vertical fixed arm.

5 to 10 are cross-sectional views sequentially showing a method of constructing a false column of the present invention.

[0017]

[Explanation of symbols]

 1 gantry device 2 locating gantry 3 vertical fixed arm 4 guide pipe 5 stigma level setting post 8 horizontal adjustment bolt 9 gimbal 10 fixed part 11 foundation pile 11a pile hole opening 16 structural column 16 'hollow steel pipe column

Claims (1)

[Claims] 1. A true pillar is installed at the center of a positioning platform which is installed at the pile mouth of a foundation pile for constructing a true pillar and whose position can be adjusted in all the horizontal directions by horizontal adjustment bolts on the outer periphery. An upper part of the guide pipe to be guided is freely suspended by a gimbal, and a fixing portion for fixing the tip end portion of a horizontal crosswise vertical fixing arm attached to the upper end portion of the guide pipe is provided on the upper surface of the positioning stand. A stanchion level setting post for setting the erection level of the stanchion stigma is provided on the upper side of the center of the vertical fixed arm so as to be vertically adjustable. .