JPS5842334B2 - Steel pipe column erection equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an apparatus for erecting large steel pipe columns, which is performed as one of the reverse construction methods for underground parts when constructing a building.

Conventionally, it is known that when a steel frame member is erected in a machine-drilled vertical hole, the upper part of the steel frame member is supported on the ground surface and is suspended so that it assumes a vertical posture. etc., the design is not symmetrical and eccentricity occurs, requiring means for positioning the lower end.

There are almost no effective methods for checking the vertical accuracy of old steel pipe columns in muddy water filled with drilling holes, so it is necessary to check the vertical accuracy of old steel pipe columns in muddy water by using an underwater jack, for example. The verticality of the steel pipe columns inside was incorrectly corrected.

In addition, in soft ground where muddy water exists in the pre-drilled vertical hole, it is not possible to obtain sufficient reaction force from the vertical hole wall, making it extremely difficult to improve the accuracy of verticality. Therefore, errors in the erection of steel pipe columns had a large impact on subsequent construction.

This invention was made in view of the above circumstances, and its purpose is to be able to accurately measure the verticality, and use the results to easily correct the inclination of steel pipe columns, as well as to prevent soft ground and muddy water. The aim is to ensure that the upper part of the steel pipe column inserted into the vertical hole is almost unaffected even under the adverse conditions that occur. The verticality is measured and corrected by installing an underwater jack in between and monitoring the upper and lower target plates coaxially installed in the steel pipe column with a vertical transit attached to the erected frame. .

Hereinafter, the present invention will be explained in detail based on embodiments shown in the drawings.

The symbol 1 in the figure is the ground surface, 2 is a standpipe inserted into the ground surface 1, 3 is a vertical hole formed vertically with the opening etc. reinforced with this standpipe 2, and 4 is the standpipe 2. A rigid floor plate 5 is laid on the surrounding ground surface 1, and a steel pipe column 5 is installed in the vertical hole 3.

A erected frame 10 that supports the upper part of the steel pipe column 5 is provided above the vertical hole 3.

This built-in frame 10 includes a frame 1 placed on the floor plate 4.
1, a plurality of jacks 12 for adjusting the levelness of this frame 11, a cart 14 that moves horizontally on rails 13° 13 fixed to the frame 11, and a plurality of jacks 12 mounted on this cart 14. adjustment jacks 15; a support frame 16 placed on these adjustment jacks 15 and supporting the steel pipe column 5;
As shown in FIG. 2, the auxiliary jack 17 is attached to the frame 11 and adjusts or fixes the horizontal position of the steel pipe column 5, and the manual hydraulic pump 18 is attached between the bent frame 11 and the truck 14. Hydraulic jack operated 19
The configuration is such that these are provided respectively.

A plurality of underwater jacks 20 for adjusting the vertical position of the steel pipe column 5 are provided between the vertical hole 3 and the steel pipe column 5 in the housing.

The underwater jack 20 includes a plurality of (four in the illustrated example) support frames 21 supported on the upper end of the stand pipe 2 and suspended between the vertical hole 3 and the gap between the steel pipe column 5;
As shown in FIG. 3, a hydraulic cylinder 24 is attached to these support frames 21 through adjustment spacers 22 so as to face the center thereof, and has a chuck plate 23 that contacts the outer peripheral surface of the steel pipe column 5; A hydraulic unit 26 is placed on the floor plate 4 on the ground surface 1 and transmits hydraulic pressure to the hydraulic cylinder 24 via a hydraulic hose 25, and a hydraulic unit 26 is attached to the upper end of the support frame 21 and connects the hydraulic cylinder 24 in the vertical direction via a wire 27. A winch 28 for rotation is provided respectively.

Additionally, a vertical inspection device 30 is inserted into the steel pipe column 5 to measure its verticality.

This vertical inspection device 30 includes a main body 31 which is supported on the upper end of a steel pipe column 5 and inserted into the steel pipe column 5 by an appropriate distance along the length direction, and which is formed into a tubular shape, as shown in FIGS. 4 and 5. The flap arm has a roller 32 at its tip that is rotatably attached to the main body 31 in a radial direction and contacts the inner circumferential surface of the steel pipe column 5, and has a group of a plurality of rollers (four in the illustrated example). 33 and a group of these flap arms 33, . . . via stays 34, .
1), hydraulic cylinders 36, . . ., which support these slide pipes 35 on the main body 31, and the frame 11, etc. A hydraulic pump 38 is attached and transmits hydraulic pressure to each hydraulic cylinder 36 via a hydraulic hose 37, and upper and lower target plates 39 and 40 shown in FIG. , is attached below the lower target plate 40 of the main body 31 and is shielded from the outside (inside the steel pipe column, etc.) and the lower target plate 40
A fine adjustment table 42 is installed movably in the horizontal direction at a position facing the upper target plate 39 of the frame 11, and a vertical transit pedestal (not provided for overturning) is installed on the fine adjustment table 42. 43, a vertical transit 44 facing the upper target plate 39, and a brake 45 for fixing the fine adjustment table 42.

Hereinafter, the operation of the present invention configured as described above will be explained in detail.

1. First, accurately drive the stand pipe 2 into the position where the steel pipe column 5 will be installed, and then manually excavate the inside of the stand pipe 2 by the length and depth of the steel pipe. Next, install a reverse machine and remove the steel pipe. A vertical hole 3 corresponding to the length of the pillar 5 is formed.

Next, a floor plate 4 is laid at the four-direction pillar position of the built-in frame 10 to be installed around the opening of the vertical hole 3, and the built-in frame facing the vertical hole 3 is accurately installed on the base plate 4.

Next, adjust the jacks 12, .
Fixed to.

Further, if necessary, a reinforcing bar (not shown) or the like is inserted into the vertical hole 3, and then a plurality of underwater jacks 20, . . . are inserted along the inner peripheral surface of the stand pipe 2 via the support frame 21. The upper end of the support frame 21 is supported on the upper opening edge of the stand pipe 2, and the winch 28 is operated to move the wire 27 upward and rotate the hydraulic cylinder 24 upward as shown in FIG.

Next, the steel pipe column 5 is suspended and inserted into the center of the vertical hole 3,
The upper end portion is supported by the support frame 16 of the erection frame 10.

The height of the upper end of the supported steel pipe column 5 (the height relative to the ground surface 1) is adjusted by raising and lowering the two adjustment jacks 15 to determine the levelness.

The horizontal and vertical position of the center of the steel pipe column 5 can be adjusted using the auxiliary jack 17. This is done by operating the hydraulic jack 19 with the hydraulic pump 18.

Next, the main body 31 of the vertical inspection device 30 is inserted into the steel pipe column 5, the hydraulic pump 38 is operated, the slide pipe 35 is moved upward by the hydraulic cylinder 36, and the flap arm 3
3 in the radial direction to bring the rollers 32 into contact with the inner circumferential surface of the steel pipe column 5.

By this operation, the main body 31 is arranged concentrically with the steel pipe column 5.

At this time, if the illumination lamp 41 is lit (lighted by a power source led from the outside through a battery power supply case or a cord), the upper and lower target plates 39 and 40 are illuminated and measurements can be taken from the top of the main body 31. It is in a state.

Next, operate the fine adjustment table 42 to install the vertical transit 44 on the vertical transit cradle 43 attached to it, and move the lower target plate 4 through the center of the upper target plate 39.
0, the upper and lower target plates 39.40 center deviation (
In other words, the inclination of the steel pipe column 5) is observed.

If there is a deviation, the fine adjustment table 42 of the vertical inspection device 30 is fixed, and the steel pipe column 5 supported on the support frame 16 of the erection frame 10 is fixed.
is adjusted using the underwater jack 20.

That is, the hydraulic unit 26 of the underwater jack 20 is operated to move the hydraulic cylinder 24 forward or backward, and the steel pipe column 5 is adjusted to a vertical state.

The vertical inspection device 30 performs a sixth inspection every time the underwater jack 20 is operated.
It is possible to observe the marked line A, the opening or the scale shown in Figure ayb and align it with the center, and it is possible to calculate the degree of inclination of the steel pipe column 5 from the shifted distance.

For example, if the scale deviation is 1 CrrL, the upper and lower target plates 3
The length dimension ratio of each of 9 and 40 and the steel pipe column 5 is 1=3
If so, the lower end of the steel pipe column 5 is shifted by 3 crn.

Once the verticality of the steel pipe column 5 is adjusted to within the permissible range, operate the hydraulic pump 38 of the vertical inspection device 30 to rotate each flap arm 33, . . . toward the center, and construct the vertical inspection device 30. Remove it from the stand 10.

Next, the steel pipe column 5 is raised slightly, temporarily supported on the upper part of the stand pipe 2 using a beam attachment cassette, the lower part of the beam material of the steel pipe column 5 is fixed to the column head on the upper part of the stand pipe 2, and the vertical hole 3 and the steel pipe are fixed. The column 5 is treated with slime and concrete is poured between the column and the lower part (excluding the stand pipe 2), and then the underwater jack 20 is loosened and removed, and the erected frame is removed. 10 also releases the support of the steel pipe column 5 and removes it.

Next, the vertical hole is backfilled with earth and sand, crushed stones, etc., and filling concrete is placed inside the steel pipe column 5, and the stand pipe 2 is
The series of work is completed by pulling out the concrete, leveling the ground, and curing the poured concrete.

In addition, in this series of operations, even if muddy water exists in the vertical hole 3 and muddy water infiltrates into the steel pipe column 5, the upper and lower target plates 39.4 in the main body 31 of the vertical inspection device 30
0 and the illumination light 41 have a liquid-tight structure that prevents muddy water from entering, so that the verticality measurement button and adjustment will not be affected by the presence of muddy water, and the standpipe 2, which is rigid even on soft ground, allows vertical holes to be 3 to ensure reliable operation of the underwater jack 20.

As described in detail above, the present invention supports the upper part of the steel pipe column inserted into the vertical hole with the erection frame, and interposes an underwater jack between the stand pipe at the upper part of the vertical hole and the steel pipe column to be inserted. By monitoring a target plate attached to a cylindrical shaft inserted into a steel pipe column using a vertical transit,
Since it is a button for measuring and correcting the verticality of a steel pipe column, it is possible to accurately measure the verticality of a steel pipe column, and since it is a simple operation that involves looking into the vertical transit, it is possible to measure the verticality of a steel pipe column accurately. The angle can be checked repeatedly, and even under adverse conditions such as soft ground or muddy water, the observation part can be made independent and will not be affected, and as a result, the slope of the steel pipe column can be easily corrected. It has excellent effects.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention; FIG. 1 is a longitudinal sectional view showing the overall configuration, FIG. 2 is a sectional view taken along the line ■-■ in FIG. 1, and FIG. Figure 4 is a detailed view of the part surrounded by chain line A in Figure 1, Figure 5 is a view taken along the V-■ arrow in Figure 1, and Figure 6a is a detailed view of the part surrounded by chain line B in Figure 1. Vl in figure 4
-Vl arrow view and FIG. 6 show other embodiments. 2...stand pipe, 3...vertical hole,
5...Steel pipe column, 10...Erection frame 1.
20...Underwater jack, 21...Support frame, 30...Vertical inspection device, 31...
...Main body, 33...Flap arm, 39.
...Upper target plate, 40...Lower target board, 44...Vertical transit.

Claims (1)

[Claims] 1 A pedestal is installed on the ground surface above a vertically excavated vertical hole, and a pedestal is installed at the lower end of a steel pipe column whose upper end is supported by this pedestal and is inserted into the vertical hole. In a steel pipe column erection device, the horizontal adjustment device comprises a support frame installed from the ground surface to the bottom of the standpipe provided in the vertical hole, and a support frame of the support frame. It consists of an underwater jack that is installed between the lower end and the outer peripheral surface of the steel pipe column and is operated from the ground to be able to swing up and down and expand and contract, and a vertical inspection device for the steel pipe column is installed inside the steel pipe column. A long tubular main body inserted from the ground, a flap arm that supports the main body concentrically within the steel pipe column, upper and lower target plates provided inside the main body, and an upper and lower target plate that is attached to the mount and supports the upper and lower target plates. A steel pipe column erection device characterized by comprising a vertical transit facing a target plate.