JPH0715873Y2 - H-shaped steel pile holding device - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention relates to an H-shaped steel pile holding device for building an H-shaped steel pile while inserting and removing it from the ground while controlling rotation around an axis.

[Conventional technology]

In a construction method in which a large number of H-shaped steel piles are built in a line in the ground for earth retaining, etc., in order to build the H-shaped steel piles in the ground, a rotary press-fitting device such as a motor is hung by a crane. A fitting made of shaped steel (so-called Yatco) is attached underneath, and an H-shaped steel pile is hung on the lower end of this fitting via a catching cap, and the H-shaped steel pile is erected in the bored hole by the rotary press-fitting device. While rotating the H-shaped steel pile around the axis through the tool to determine the direction, the H-shaped steel pile is hung and built into the ground by the rotary press-fitting device and the installation tool, and finally the press-fitting is performed. ing.

[Problems to be solved by the device]

However, the connection between the fitting and the H-shaped steel pile is performed by the catching cap. According to this, since the coupling between the catching cap and the H-shaped steel pile is not sufficient, There is a problem that the building accuracy of the H-shaped steel pile is not sufficient due to defects such as bending between the H-shaped steel pile and looseness in the axial direction.

In order to solve the problems of the prior art, the present invention rigidly connects the H-shaped steel pile to the fitting to accurately assemble the axial direction and posture of the H-shaped steel pile. Is intended.

[Means for Solving the Problems]

This invention is provided with two plate pieces sandwiching the web portion of the H-shaped steel pile from both sides at the lower part of the main body fixed to a fitting that can be rotated and moved up and down. A clamp penetrating the web part sandwiched therebetween so as to be able to be inserted and removed is attached to one of the main body and the plate piece, and at least the strip for pulling out the clamp from the web by pulling the clamp is connected to the clamp, and The inscribed member inscribed in the opposing flanges of the H-shaped steel pile is attached to the lower portion of the main body to form the H-shaped steel pile holding device.

[Action]

The H-shaped steel pile holding device is relatively lowered from above toward the upper end of the H-shaped steel pile, the web of the H-shaped steel pile is sandwiched between two plate pieces, and the inscribed member is the H-shaped steel pile. Insert it between both flanges facing each other. Further, a clamp is inserted through the plate pieces and the web between them by using holes preliminarily formed therein. Thus, the clamp is supported in the vertical direction, the plate piece is supported in the vertical direction in the horizontal direction, the inscribed member is supported in the horizontal direction in the horizontal direction, and the plate piece and The H-section steel pile is rigidly connected to the H-section steel pile retainer for being supported by the inscribed member. Therefore, since the behavior of the H-shaped steel pile is built in the ground integrally with the fitting, it is possible to accurately build the directionality and the verticality of the fitting around the axis.

After the construction is completed, if the clamp is pulled out from the plate piece and the web of the H-section steel pile by pulling the strip from the ground, the H-section steel pile retainer can be vertically moved from the H-section steel pile. , The H-shaped steel pile holding device can be lifted up together with the installation tool and removed, whereby the installation of the H-shaped steel pile is completed.

〔Example〕

1 to 6 are diagrams showing a first embodiment. FIGS. 1 and 2 show an H-shaped steel pile holding device 2 fixed to the lower end of the installation tool 1. The fitting 1 is commonly referred to as "yatco" by those skilled in the art, and is made of H-shaped steel. A rotary press-fitting device such as a motor is connected to the upper end of the fitting 1, and the rotary press-fitting device can be lifted and lowered by a crane or the like. The fitting 1 is supported so that the fitting 1 can be raised and lowered and rotated about an axis. Such a rotary press-fitting device and fitting 1 are commonly used by those skilled in the art.

The H-shaped steel pile holding device 2 fixed to the lower end of the fitting 1 by the bolt nut 3 is made by cutting the H-shaped steel into short pieces in the main body 4, and making the web 4a and both flanges 4b perpendicular to each other. is there. Two parallel plate pieces 5 are fixed to the lower end of the main body 4. In this fixing, the upper parts of the two plate pieces 5 are fixed to the lower part of the web 4a of the main body 4 by welding or the like with the lower part of the web 4a sandwiched therebetween, and thus, the two plate pieces 5 have the same interval as the thickness of the web 4a. Formed in between.

Further, the inscribed member 6 is fixed between the two flanges 4b facing each other at the bottom of the main body 4. The inscribed member 6 is arranged such that the upper portions of the parallel portions of the U-shaped steel material are individually fixed to the flanges 4b, and the other portions are shown below the main body 4, so that the outside surfaces of the inscribed member 6 6a coincides with the extended surface of the inner surface of the flange 4b that constitutes the main body 4.

A bracket 7 is fixed to one of the plate pieces 5, and an arm 8 is pivotally attached to the bracket 7, and a clamp 9 is pivotally attached to the tip of the arm 8. The clamp 9 is inserted through a hole 5a formed in each of the plate pieces 5 so that the clamp 9 can be freely inserted and removed, and can be inserted and removed by swinging the arm 8. One end of a strip 11 is connected to the arm 8 and the clamp 9 can be pulled out from the plate piece 5 by pulling the strip 11. A frame 12 is fixed to the plate piece 5 and surrounds the arm 8 to prevent the arm 8 from overturning.

The state in which the H-shaped steel pile 13 is held by the H-shaped steel pile holding device 2 is shown in FIGS. The H-shaped steel pile 13 abuts its upper end surface against the lower end surface of the main body 4 of the H-shaped steel pile holding device 2,
The web 13a is inserted between the plate pieces 5 of the H-shaped steel pile holding device 2, and the parallel flange 13b is inserted into the H-shaped steel pile holding device 2.
In contact with the outer surface 6a of the inscribed member 6 of
The hole 13c of the web 13a and the hole 5a of the plate piece 5 are aligned with each other, and the clamp 9 is inserted into these holes, so that the H-shaped steel pile holding device 2 is held.

This holding state is supported by the clamp 9 in the vertical direction, in the vertical direction in the horizontal direction (the horizontal direction in FIGS. 1 and 3) by the plate piece 5, and in the horizontal direction in the horizontal direction (second direction). , 4 in the left-right direction) inscribed member 6
The H-section steel pile 13 is rigidly connected to the H-section steel pile holding device 2 because it is supported by the plate piece 5 and the inscribed member 6 in the bending direction of the shaft. For this reason, the behavior of the H-shaped steel pile 2 is built in the ground together with the fitting 1 so that the direction around the axis and the verticality of the fitting 1 can be built accurately.

The H-shaped steel pile 13 is built in the ground by suspending it in a pre-excavated hole in the ground, identifying its posture and orientation, and attaching the lower end of the pile to the bottom of the hole. Is pressed downward, and the lower end thereof is pressed into the bottom of the hole bottom (root insertion).
In FIG. 6, a portion indicated by reference numeral 17 is a wall of a hole formed by excavating the ground, a portion indicated by 17a is a hole bottom, and a portion indicated by reference numeral 13c is the root of the H-shaped steel pile 13. It is a part.

When the H-shaped steel pile 13 is built deep in the ground, the H-shaped steel pile holding device 2 also deeply goes into the hole as shown in FIG.
Similarly, the lower part of the base also deeply penetrates into the hole in the ground, but by extending the other end of the strip 11 to the ground, when this is pulled on the ground, the arm 8 pivots and the clamp 9 causes the plate piece 5 and the web to move. It escapes from the holes 5a and 13c of 13a. This makes H
Since the shaped steel pile holding device 2 and the web 13a are freely movable in the vertical direction, when the fitting 1 is raised, the fitting 1 and the H-shaped steel holding device 2 can be integrally removed to the ground. On the other hand, it is possible to leave only the H-shaped steel pile 13 in the ground and set it in the built-in state. In addition, FIG. 6 shows an outline of a state immediately before the H-shaped steel pile 13 is built deeply in the ground and the fitting 1 and the H-shaped steel holding device 2 are removed. A rotary drive device 14 is attached to the upper end, and the rotary drive device 14 is fixed to an elevating device 15 so that it can be elevated and lowered.

Since the arm 8 in this embodiment has a downward slope on the lower part of the curved outer side, when the H-shaped steel pile 13 descends, the earth and sand hit the slope, and the clamp 9 is pushed into the hole 13c of the web 13a and the plate piece 5. The clamp 9 does not fall off because it has a function of being pushed into the hole 5a.

FIG. 7 shows the second embodiment, in which H-shaped steel piles 13
This is an example in which the amplifying member 16 is fixed to both outer side surfaces 6a of the inscribed member 6 when the distance between the facing flanges 13b is large. The amplifying member 16 is fixed by a fixing means such as a bolt 17 and substantially enlarges the distance between both outer side surfaces 6a of the inscribed member 6, so that a plurality of types of amplifying members 16 having different thicknesses are prepared in advance. By doing so, changes in the dimensions of the H-shaped steel pile 13 can be dealt with. Other configurations and operations are the same as those in the first embodiment.

In addition, in both the above-mentioned examples, H-section steel was used as the main body 4 of the H-section steel pile holding device 2, but if the plate piece 5, the inscribed member 6 and the clamp 9 are provided, other section steels can be used. It is also possible to use, and a U-shaped member is used as the inscribed member 6, but it is also possible to use another shape as long as it forms the two outer surfaces 6a. is there.

[Effect of device]

As described above, in the present invention, the H-shaped steel pile is supported by the clamp in the vertical direction with respect to the main body, is supported by the plate piece in the vertical direction in the horizontal direction, and is supported in the horizontal direction in the horizontal direction. Is supported by the inscribed member, and in the bending direction by the plate piece and the inscribed member, the H-section steel pile is rigidly connected to the H-section steel pile holding device. For this reason, the behavior of the H-section steel pile is built in the ground together with the fittings up to the lower end of the H-section steel piles. There is an effect that it can be built.

[Brief description of drawings]

FIG. 1 is a side view of the first embodiment, FIG. 2 is a front view of the same, FIG. 3 is a partially cutaway side view of the H-shaped steel pile being held, and FIG.
The drawing is a front view of FIG. 3, FIG. 5 is a cross-sectional view taken along line VV of FIG. 4, and FIG. 6 is an explanatory view showing an outline of a built-in state of an H-shaped steel pile.
FIG. 7 is a front view of the second embodiment. 1 ... Installation tool, 2 ... H-shaped steel pile holding device, 4 ... Main body,
5 ... Plate, 6 ... Inner member, 8 ... Arm, 9 ... Clamp, 11 ... Strip, 13 ... H-shaped steel pile, 14 ... Rotation drive device, 15 ... Lifting device, 16 …… Amplifying member.

Claims (1)

[Scope of utility model registration request] 1. A lower part of a main body fixed to a fitting that can be rotated and moved up and down is provided with two plate pieces sandwiching a web part of an H-shaped steel pile from both sides, and the two plate pieces and these. A clamp penetrating through the web portion sandwiched between the clamps is attached to either the main body or the plate piece, and at least a strip for pulling out the clamp from the web by pulling the clamp is connected to the clamp, and An H-shaped steel pile holding device, wherein an inscribed member inscribed in an opposing flange of the H-shaped steel pile is attached to a lower portion of the main body.