JP2515605Y2 - Auxiliary jig for press-fitting steel pipes - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a tubular jig body for press-fitting a steel pipe into a hole excavated by an excavator such as a three-axis or a five-axis when constructing an underground continuous wall with a steel pipe pile. A coupling flange that is detachably attached to the auger machine is provided on one end side in the cylinder axis direction, and an engaging convex portion is provided on the other end side on the inner peripheral surface of the press-fitting steel pipe at predetermined intervals in the circumferential direction. The present invention relates to an auxiliary jig for rotationally press-fitting a steel pipe, which is provided with an angle-shaped notch that is locked to

[0002]

2. Description of the Related Art Generally, a depth of about 1 m outside the upper lateral side of a constructed underground continuous wall is excavated, and a soil is placed there to carry out cliff-stopping treatment. It takes time and labor to increase the number of steps and requires extra materials, which has the drawback of increasing both the construction period and the construction cost, and also secures a space to be provided with a mountain stopper on the lateral outside of the continuous underground wall. Therefore, there was a drawback that the building could not be built to fill the site.

Therefore, conventionally, by welding H-shaped steel as a mountain stopper constituent material to a predetermined position on the inner peripheral surface of the uppermost steel pipe, and attaching a sheet pile to these H-shaped steels to perform mountain stopper treatment, We are building a building that fills the site.

[0004]

However, in the past, since the H-section steel had to be welded after the uppermost steel pipe was press-fitted, there was a drawback that labor was required and the construction period could not be effectively shortened.

The present invention has been made in view of the above circumstances, and it is possible to reliably confirm the position of the mountain stopper forming member of a press-fitting steel pipe in which the mountain stopper forming member is welded to the inner peripheral surface. It is also an object of the present invention to provide a steel pipe rotary press-fitting auxiliary jig that can be press-fitted in a state where the working space is made as small as possible.

[0006]

SUMMARY OF THE INVENTION In order to achieve the above-mentioned object, the present invention provides a connection flange detachably attached to an auger machine at one end side of a cylindrical jig body in the cylinder axis direction. And an auxiliary jig for rotary press-fitting of a steel pipe, in which the other end is provided with an angle-shaped notch for engaging with an engaging projection provided on the inner peripheral surface of the press-fitting steel pipe at predetermined intervals in the circumferential direction. In the above, a concave portion is formed at a predetermined position in the circumferential direction of the jig main body, into which a mountain stopper component welded to the inner circumferential surface of the press-fitting steel pipe is inserted over a predetermined length in the cylinder axis direction.

[0007]

According to the structure of the steel pipe rotary press-fitting jig of the present invention, the mountain stopper component is welded to the inner peripheral surface of the uppermost press-fitting steel pipe in advance, and the mountain stopper component is formed in the recess. With the notch locked in the convex part attached to the inner peripheral surface of the press-fitting steel pipe in the inserted state, press-fitted into the excavation hole by driving rotation of the auger machine, press-fitted to a predetermined depth, It is possible to adjust the position so as to obtain a predetermined position, and attach the sheet piles over these mountain stopper constituent materials to perform the mountain stopper treatment.

[0008]

Next, an embodiment of the present invention will be described in detail with reference to the drawings.

FIG. 1 is a partial cutaway perspective view of a steel pipe rotary press-fitting auxiliary jig and a press-fitting steel pipe engaged with the jig. One end side of a cylindrical jig body 1 in the cylinder axis direction is A connecting flange 3 is provided which is detachably attached to the auger machine 2 (see FIG. 5), and on the other hand, for engagement, which is attached to the inner peripheral surface of the press-fitting steel pipe 4 at a predetermined interval in the circumferential direction. Angle-shaped notches 6 that engage with the protrusions 5 are provided.

A recess 7 is formed at a predetermined position in the circumferential direction of the jig body 1 over a predetermined length in the cylinder axis direction, and is shown in a side view of FIG. 2 and a cross-sectional view of FIG. 3 (line AA in FIG. 2). (Enlarged sectional view)
As shown in each of the longitudinal cross-sectional views (enlarged cross-sectional view taken along the line BB of FIG. 3) of FIG. 4 and FIG. 4, the mountain welded to the inner peripheral surface of the press-fitting steel pipe 4 in a state of protruding in the pipe axis direction. H-shaped steel 8 as a stopper component is put into the recessed portion 7, and in that state, the notch 6
Are configured to be locked to the engaging convex portions 5 ...
In the figure, 9 indicates a reinforcing plate.

Next, description will be made on the mountain stopping process performed by using the steel pipe rotary press-fitting auxiliary jig J having the above structure.

First, as shown in FIG. 5A, the excavation hole 10 excavated by a three-axis or five-axis excavator.
A steel pipe 4a for the lower side, which constitutes the steel pipe 4 for press-fitting, is hung above by a crane (not shown), and the steel pipe 4a for the lower side is built in the excavation hole 10.

Then, as shown in FIG. 5 (b), an upper steel pipe 4b, which constitutes the press-fitting steel pipe 4 and has an H-shaped steel 8 welded to its upper end, is hung by a crane (not shown),
The lower end of the upper steel pipe 4b is welded to the upper end of the lower steel pipe 4a.

Thereafter, as shown in FIG. 5 (c), the earth auger 11 equipped with the auger machine 2 is run near the excavation hole 10 and stopped, and the auger machine 2 is attached with the connecting flange 3 to assist it. Jig J is attached integrally and H
With the shaped steel 8 inserted in the concave portion 7, the notch 6 is rotationally locked to the engaging convex portion 5 ... And press-fitted by driving rotation of the auger machine 2 as shown in FIG. The shaped steel 8 is built in the excavation hole 10 to a predetermined depth so that the shaped steel 8 is located in a predetermined posture on the boundary side of the site.

Then, as shown in the plan view of FIG. 6 and the side view of FIG. 7, respectively, a waving member 12 is attached over the H-shaped steels 8 built at predetermined intervals, and a steel sheet pile is attached to the waving member 12. 13 is attached and a mountain stopper is applied.

[0016]

EFFECTS OF THE INVENTION According to the steel pipe rotary press-fitting auxiliary jig of the present invention, it is possible to previously weld the mountain stopper component material to the inner peripheral surface of the uppermost press-fitting steel pipe in a factory or on-site. Therefore, the welding work of the mountain stopper component material after the press-fitting steel pipe has been press-fitted into the excavation hole can be dispensed with, and the mountain stopper processing work can be carried out quickly and the construction period can be shortened.

In addition, for example, in the case where a convex portion is formed on the outside of the press-fitting steel pipe and is locked in the notch, the auxiliary jig must be larger than the press-fitting steel pipe, and a mountain stopper structure is required. In contrast to the fact that the position of the material cannot be confirmed from the outside, in this proposal, a recess is formed to receive the mountain stopper component material, and the notch is locked to the projection attached to the inner peripheral surface of the press-fitting steel pipe. Not only does the tool have to be larger than the press-fitting steel pipe, but the cleat component can be seen from the outside, and its position can be easily confirmed, which is extremely convenient in practice.

[Brief description of drawings]

FIG. 1 is a partial cutaway perspective view of a steel pipe rotary press-fitting auxiliary jig and a press-fitting steel pipe locked by the jig.

FIG. 2 is a side view of a jig body.

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

FIG. 4 is an enlarged sectional view taken along line BB of FIG.

FIG. 5 is a schematic vertical cross-sectional view illustrating a mountain stopping process performed using a steel pipe rotary press-fitting auxiliary jig.

FIG. 6 is a plan view of a mountain stopper processing unit.

FIG. 7 is a side view of a mountain stopper processing unit.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Jig main body 2 ... Auger machine 3 ... Connection flange 4 ... Press-fitting steel pipe 5 ... Engagement convex part 6 ... Notch 7 ... Recessed part 8 ... H-shaped steel as a mountain stopper component 10 ... Excavation hole 11 ... Earth auger

Claims (1)

(57) [Scope of utility model registration request] 1. A connection flange detachably attached to an auger machine is provided on one end side of a tubular jig body in the cylinder axis direction, and the other end side is circumferentially formed on an inner peripheral surface of a press-fitting steel pipe. In a steel pipe rotary press-fitting auxiliary jig provided with angle-shaped notches for engaging with engaging protrusions provided at a predetermined interval, at a predetermined position in the circumferential direction of the jig body, in the cylinder axis direction. An auxiliary jig for rotary press-fitting of a steel pipe, characterized in that a recess for receiving a welded mountain component is formed on the inner peripheral surface of the steel pipe for press-fitting over a predetermined length.