JP2006299562A - Punching device for connected steel pipe pile and connected steel pipe sheet pile - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a chuck technology suitable for the case where a connected steel pipe 6 constituted by integrally welding two parallel steel pipes 5a to each other via H-shaped steel 6b is used as a pile. <P>SOLUTION: A line, which connects the centers of the two steel pipes 5a together, serves as the X-axis, and the center of the line is set as the origin O of coordinates. At least two sets (in this case, four sets 2A, 2B, 2C and 2D) of chucks are arranged symmetrically with respect to the X-axis and/or symmetrically with respect to the origin O of coordinates. In this case, the piles 6 can be evenly held by the four chucks, and punching can be accurately performed with high efficiency by applying an even force. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an apparatus for gripping a connected steel pipe pile or a connected steel pipe sheet pile that has been recently developed and is rapidly spreading.

In order to drive or pull out the pile, the pile is gripped by a chuck provided in the pile punching machine. FIG. 5 shows a known chuck mechanism.
FIG. 5A is a perspective view schematically illustrating a state in which a known steel sheet pile 1s is held by the chuck 2, and FIG. 5B is a horizontal sectional view.
FIG. 5C is a schematic vertical sectional view of a typical known chuck 3 in which a hydraulic cylinder 3b is provided on a bifurcated body 3a. Reference numeral 3c denotes a chucking plate, which has a serrated cross section, but is a hard member having anti-slip irregularities formed on one surface. It has a structure in which a pile is sandwiched between two chucking plates.
FIG. 5D is a schematic view of a typical known chuck 4 different from the above, and the movable arm 4b is pivotally supported with respect to the fixed arm 4a formed integrally with the chuck body. The hydraulic cylinder 4d is driven to open and close. 4e is a chucking plate.
FIG. 6 is a perspective view schematically illustrating a state in which a known steel pipe pile 1p is gripped by the chuck 2, and (B) is a horizontal sectional view of the same.
Japanese Unexamined Patent Publication No. 7-158067

Steel piles and steel pipe piles were the mainstream of steel piles used for conventional pile driving work. However, recently, steel piles or cores in which two steel pipes are arranged in parallel and an elongated steel material (for example, H-shaped steel) is interposed between them have been developed and are publicly known (for example, JP-A-10-273918).
This new “pile made of connected steel pipes” has many advantages such as relatively light weight, high rigidity, and suitable for industrial production, and is rapidly spreading.
However, since it is a steel pile having a novel shape that has not existed before, a chuck suitable for gripping the steel pile by a pile punching machine has not yet been developed.
FIG. 7A is an end view showing a connecting steel pipe 5 which is a known example. Two steel pipes 5a are arranged in parallel, and two connecting plates 5b are welded to form an integral structure. The connecting plate is an elongated rectangular steel plate.
It is a pile joint shown with the code | symbol 6c.

FIG. 7B is an end view of a known connecting steel pipe 6 obtained by improving the connecting steel pipe 5. The difference from the above is that one H-shaped steel 6b is used in place of the two connecting plates 5b. This facilitates welding work and further increases the rigidity.
Pile joints are shown with reference numerals 6e and 6d.
Strictly speaking, the one without this pile joint should be called a connected steel pipe pile, and the one with a pile joint should be called a connected steel pipe sheet pile. Since there is no relationship, hereinafter, when it is not confusing, the term “connected steel pipe pile” includes a connected steel pipe sheet pile.
FIG. 7C is an end view of an unknown connection steel pipe 7 related to a trial for gripping the connection steel pipe 6 shown in FIG. A gripping plate 7a (shown with spots) is welded so as to be sandwiched between and gripped.
According to the experiments by the present inventors, it has been confirmed that, by previously welding the grip plate 7a, the connecting steel pipe 7 can be used as a pile and can be driven and pulled out by a pile punching machine.
However, it is more advantageous if it can be piled without the need to weld the gripping plate 7a if desired.
Furthermore, it is desirable that many types of connected steel pipe piles having different shapes and dimensions can be punched with the same pile punching machine.

The present invention has been made in view of the above circumstances, and it is not necessary to weld a dedicated component for punching a connection steel pipe, and it can adapt to various types of connection steel pipes. It is intended to provide gripping technology.
(Refer to FIG. 7) The connection steel pipe has an effect of reducing the weight and increasing the rigidity, so that the connection steel pipe is also useful as a pile, a core material, and other structural members. However, the present invention applies to the case where this is used as a pile.
In many cases, pile joints (6d, 6e) are attached to the connected steel pipe piles to form a connected steel pipe sheet pile (not shown), which is coupled to the adjacent connected steel pipe sheet pile.
(See FIG. 7 (C)) When a pile joint (6d, 6e) is provided and jointed with another structural member, the area indicated by the chain line p is a general placement designated seat, and the outside of this area p. It must be considered that there may be obstacles. In particular, there may be a case where “an adjacent connected steel pipe sheet pile (not shown) to be coupled by a pile joint” is half-placed and temporarily installed in a self-supporting state.
For this reason, it is desirable for the “pile punching machine equipped with the pile chuck 2” to have the contour in the planar projection within the above-mentioned area p (chain line).
The present invention has been created with consideration given to easily satisfying the above requirements.

The structure of the invention according to claim 1 of the present application created to achieve the above object is a connection in which a plurality of steel pipes are arranged in parallel and two adjacent steel pipes are integrally connected by an elongated steel material. In a device for driving and / or extracting steel pipe piles,
Assuming a plane perpendicular to the center line of the steel pipe, the line connecting the center points of the two steel pipes is the X axis,
A plurality of chucks (2) are provided below the exciter,
The chuck (2) is configured to be able to grip the two steel pipes at a place symmetrical with respect to the X axis.
According to the method of the invention of claim 1 described above, the action line of the resultant force of the gravity load and the pile driving load applied to the connected steel pipe pile via the chuck coincides with the center line of the connected steel pipe pile.
For this reason, a uniform pile punching force is given to the connected steel pipe pile in the longitudinal direction, and the connected steel pipe pile can be efficiently driven or pulled out in the correct direction.

The configuration of the invention according to claim 2 is an apparatus for driving and / or pulling out a connected steel pipe pile in which a plurality of steel pipes are arranged in parallel, and two adjacent steel pipes are integrally connected by an elongated steel material.
Assuming a plane perpendicular to the center line of the steel pipe, the line connecting the center points of the two steel pipes is the X axis, the center point of the two steel pipes located on the X axis is the coordinate origin O,
There is a chuck (2) below the exciter,
The chuck (2) is characterized in that the steel pipe can be gripped at a coordinate origin O or can be gripped at a symmetrical place with respect to the coordinate origin O.
Also according to the invention of claim 2 described above, the action line of the resultant force of the gravity load and the pile driving load applied to the connecting steel pipe pile via the chuck coincides with the center line of the connecting steel pipe pile.
For this reason, a uniform pile punching force is given to the connected steel pipe pile in the longitudinal direction, and the connected steel pipe pile can be efficiently driven or pulled out in the correct direction.

According to a third aspect of the invention, in addition to the constituent features of the first or second aspect of the invention, the chuck (2) is connected to the vibrator through a slide mechanism (9). The slide mechanism has a function of sliding or rotating relatively along a virtual plane orthogonal to the steel pipe.
According to the invention of claim 3 described above, even if the gripping location of the connecting steel pipe by the chuck or the diameter dimension of the steel pipe changes, the chuck and the connecting steel pipe are in uniform contact with each other at a high local pressure. There is no risk of damaging or bending the steel pipe.

In the configuration of the invention according to claim 4, in addition to the constituent features of the invention of claim 1 or claim 2, the chuck includes a chucking plate (10A, 10B, 11A, 11B),
In addition, a plurality of types of these chucking plates are prepared, and the structure is characterized in that it can be attached and detached in accordance with the shape and dimensions of the connected steel pipe pile.
According to the invention of claim 4 described above, even when the gripping position of the connecting steel pipe by the chuck or the diameter dimension of the steel pipe changes, the chuck and the connecting steel pipe are in uniform contact with each other at a high local pressure. There is no risk of damaging or bending the steel pipe.

According to the invention of claim 1, the action line of the resultant force of the gravity load and the pile driving load applied to the connecting steel pipe pile via the chuck coincides with the center line of the connecting steel pipe pile.
For this reason, a uniform pile punching force is given to the connected steel pipe pile in the longitudinal direction, and the connected steel pipe pile can be efficiently driven or pulled out in the correct direction.
Also according to the invention of claim 2, the action line of the resultant force of the gravity load and the pile driving load applied to the connecting steel pipe pile via the chuck coincides with the center line of the connecting steel pipe pile.
For this reason, a uniform pile punching force is given to the connected steel pipe pile in the longitudinal direction, and the connected steel pipe pile can be efficiently driven or pulled out in the correct direction.
According to the invention of claim 3, even if the gripping position of the connecting steel pipe by the chuck or the diameter dimension of the steel pipe changes, the chuck and the connecting steel pipe are in uniform contact, and the steel pipe is damaged by local high pressure. There is no fear of bending.
According to the invention of claim 4, even if the gripping location of the connecting steel pipe by the chuck or the diameter dimension of the steel pipe changes, the chuck and the connecting steel pipe are in uniform contact, and the steel pipe is damaged by a local high pressure. There is no fear of bending.

1A and 1B show a main part of the device of the present invention, in which FIG. 1A is a schematic bottom view and FIG. 1B is a schematic bb cross-sectional view thereof.
Reference numeral 8 denotes a base plate of the chuck mechanism, which is fixed to the lower portion of the vibration generator (not shown). Four sets of chucks 2 </ b> A to 2 </ b> D are arranged below the base plate 8 (on the front side of the paper surface in FIG. 5A) via a slide mechanism 9.
The slide mechanism is a structure in which the base plate 8 and the chuck are brought into contact with each other on a horizontal plane and fastened with a bolt nut and a long hole (both not shown), and can move and rotate in the horizontal plane. ing. When the specification (shape dimension) of the connection steel pipe which is the object of the punching operation is constant, the slide mechanism 9 can be omitted.
The four sets of chucks are the same components, but for convenience of explanation, they are named and distinguished from 2A to 2D.

For convenience of explanation, the line connecting the center points of the two steel pipes 5a is taken as the X axis, and the central point between the center points of the two steel pipes is named the coordinate origin 0.
The four sets of chucks are arranged symmetrically with respect to the coordinate origin in the plan view.

The chuck 2A and the chuck 2D are arranged symmetrically with respect to the coordinate origin O,
Both the chuck 2B and the chuck 2C are arranged symmetrically with respect to the coordinate origin O. In carrying out the present invention, it is sufficient that at least two sets (for example, chuck 2A and 2D) are positioned symmetrically.
In the example of this figure, when two sets of chucks 2A and 2B are viewed as one group and two sets of chucks 2C and 2D are viewed as one group, both groups are symmetrical with respect to the coordinate origin O. It is made. When practicing the present invention, it is desirable to make the symmetry as high as possible in this example.
Further, the chucks 2A and 2C and the chucks 2B and 2D are symmetric with respect to the X axis.
Thus, if each chuck | zipper is arrange | positioned symmetrically, the action line of the resultant force of the vibration and punching force which are given to the connection steel pipe 6 through these chucks will correspond with a centerline.

FIG. 2 shows a technique for adapting the gripping device according to the present invention to connecting steel pipes of various specifications. (A) When the steel pipe 5a shown by the solid line in the figure is welded to the H-shaped steel 6b, the chuck (not shown) must be sandwiched between the steel pipe 5a (solid line) in the normal direction as indicated by arrows r and r '. But,
When the large-diameter steel pipe 5b is welded as shown by the chain line, it must be sandwiched between the arrows RR 'by the chuck.
As described above, since the direction of clamping must be changed depending on the diameter of the steel pipe, as shown in FIG. 1 (A), a chuck may be installed via the slide mechanism 9 as one of the measures. Recommended.
The above slide mechanism can be replaced by a known mechanism disclosed in, for example, Japanese Patent Laid-Open No. 10-147933. In this known mechanism, the chuck can be brought into a free state in which the chuck can be rotated around the vertical axis, rotated by power, or stopped by braking the rotation.

FIG. 2 (B1) and (B2) are schematic views of different measures for adapting the chuck 2 to the diameter of the steel pipe.
When the radius of the inner peripheral surface of the steel pipe is r1 and the radius of the outer peripheral surface is r2, chucking plate 10A having a convex cylindrical surface with radius r1 and chucking plate 10B having a concave cylindrical surface with radius r2 are chucked 2 Attach to the pinching part.
When the diameter of the steel pipe is increased and the radius of the inner peripheral surface is R1 and the radius of the outer peripheral surface is R2, the chucking plate 11A having a convex cylindrical surface with a radius R1 and the chucking plate having a concave cylindrical surface with a radius R2 Replace with 11B. Thereby, it can adapt to the change of the curvature of the to-be-gripped location of a steel pipe, and the change of a cut line direction.

FIG. 3 is a schematic bottom view for explaining an embodiment different from FIG. 1 described above. In FIG. 3A, four sets of chucks 2 for gripping two steel pipes 5a forming a connected steel pipe pile are drawn with solid lines.
In this example, the chucks 2 are arranged on a virtual diameter DD parallel to the web 6bw of the H-shaped steel 6 so that each chuck 2 can sandwich and grip the steel pipe 5a in the diameter direction. ing. This embodiment is suitable for gripping a connected steel pipe pile having a relatively small pipe diameter.
In FIG. 3A, a chuck 15 having a structure in which the H-shaped steel 6 is sandwiched and gripped is drawn by a dotted line. When the web 6bw of the H-shaped steel 6 is sandwiched between a pair of chucks 15 shown in FIG. 3A, the H-shaped steel 5 is sufficient even if it is clamped with a strong force to obtain a gripping force necessary for punching. Indicates rigidity. Such gripping is suitable when the connected steel pipe pile is gripped by a press-fitting punching machine.
The reason is as follows. That is, it is relatively easy for the vibration-type pile punching machine to perform the punching operation by gripping the upper end portion of the pile or to perform the punching operation by gripping the middle part of the pile. However, the press-fitting pile punching machine usually needs to grip a middle portion from the outside of the pile in the longitudinal direction of the pile. From such a viewpoint, the chuck 15 (dotted line) having a structure in which a portion of the chuck is gripped from the outside without being inserted into the connecting steel pipe is suitable for a press-fitting pile punching machine.

The reason why the H-shaped steel 6 shows a large rigidity with respect to the chuck 15 is that the web 6bw acts as a reinforcing material for withstanding the clamping pressure.
From the same point of view, it is also recommended to sandwich the flange 6bf of the H-shaped steel 6 to the full width, or to sandwich the vicinity of the end of the flange 6bf in the width direction (joint portion with the steel pipe 5a). The reason is that the portion in contact with the flange 6bf steel pipe 5a is reinforced by the steel pipe 5a.
The two sets of chucks 2 indicated by solid lines in FIG. 3B are arranged symmetrically with respect to the center line (point) O so that the end of the flange 6bf of the H-shaped steel 6b can be gripped. .
Further, the chuck 2 'shown by a dotted line in FIG. 3B is disposed symmetrically with respect to the center line (point) O so that the center portion of the web 6bw of the H-section steel 6b can be gripped.
When arranged like the chuck 2 of FIG. 3 (B) or like the chuck 2 ', vibration and / or punching direction force can be applied to the connecting steel pipe pile without bias. .

(See FIG. 3 (A)) Each of the four sets of chucks 2 is provided at “both ends of a virtual diameter DD orthogonal to a symmetric line XX passing through the center point O of the entire connecting steel pipe pile”. But
A slide mechanism 12 that can slide in the direction of the diameter DD is provided so as to cope with a thickness dimension error of the steel pipe 5a and a change in the diameter dimension.
If the slide mechanism 12 is provided, when the steel pipe 5a is gripped by the chuck 2, the steel pipe can be gripped accurately and stably without being pressed in the diametrical direction or pulled in the diametrical direction.

FIG. 4A is a schematic plan view showing an embodiment different from the above. The chuck 2 grips the portion immediately adjacent to “the place where the steel pipe 5 a is connected (welded) to an elongated steel material or H-shaped steel”.
In the embodiment of FIG. 4A, two chucks 2 are installed near both ends of a base plate 8 having a relatively long and narrow shape. Although it is difficult to grasp the features of the present invention by this alone, two points symmetrical with respect to the coordinate origin O can be grasped by attaching the chuck 2 to the base plate 8 via the slide mechanism 9.
As an application example of FIG. 4 (A), when an additional base plate 8 'is provided and two sets of chucks 2 are added as shown in FIG. The punching force can be given evenly.

4 (C) and 4 (D) are application examples of the basic configuration of the present invention in which gripping is performed symmetrically with respect to the center of the connecting steel pipe.
As illustrated by a solid line in FIG. 4C, the two chucks 2 may be used to grip the “closest points (positioned on the X axis)” of the two steel pipes 5; The two steel pipes 5 [locations farthest from each other (located on the X-axis)] may be gripped as depicted by virtual lines. In any case, a uniform punching force can be applied to the connected steel pipe piles.
As shown in FIG. 4D, even if the symmetrical center of the connected steel pipe pile is gripped by the “W-shaped chuck 2W composed of one fixed claw and two movable claws”, the connected steel pipe pile is similarly used. Can be given a uniform punching force.

1 shows one embodiment of the present invention, (A) is a schematic bottom view, (B) is a bb cross-sectional arrow view. 1A and 1B are shown for explaining the details of the embodiment of FIG. 1, in which FIG. 1A is a schematic diagram illustrating a relationship between a diameter of a steel pipe and a sandwiching method, and FIG. 1B and FIG. 2B are diameters of the steel pipe. Schematic horizontal sectional view of a chucking plate that conforms to FIG. FIG. 3 is a schematic plan view illustrating four examples of the embodiment different from FIG. 1 described above. The typical top view shown in order to demonstrate embodiment different from the above-mentioned FIG. 1 thru | or FIG. 3 floor. It is shown in order to demonstrate a well-known pile chuck | zipper, Comprising: (A) is a typical perspective view of the state which hold | gripped the steel sheet pile, (B) is the horizontal sectional view, (C) One example of a chuck | zipper Sectional drawing, (D) is an external view of a different chuck. The state which hold | gripped the steel pipe pile with the well-known chuck | zipper is shown, (A) is a typical perspective view, (B) is typical sectional drawing. It was shown in order to demonstrate a connection steel pipe pile, (A) and (B) are top views of a well-known example, (C) is a schematic top view of the connection steel pipe pile of a proposal.

Explanation of symbols

1s ... steel sheet pile, 1p ... steel pipe pile, 2, 2 '... chuck, 3 ... chuck, 3a ... bifurcated body, 3b ... hydraulic cylinder, 3c ... chucking plate, 4 ... chuck, 4a ... fixed arm, 4b ... Movable arm, 4c ... shaft, 4d ... hydraulic cylinder, 4e ... chucking plate,
5 ... Connection steel pipe, 5a ... Steel pipe, 5b ... Connecting plate, 6 ... Connection steel pipe, 6a ... Steel pipe, 6b ... H-shaped steel, 6bf ... Flange, 6bw ... Web, 6c, 6d, 6e ... Pile joint, 7 ... Connection of the tentative plan Steel pipe, 7a ... grip plate, 8 ... base plate of chuck, 9 ... slide mechanism, 10A, 10B, 11A, 11B ... chucking plate, 12 ... slide, 13 ... chuck, 14 ... adjustable chuck, 15 ... chuck, 16 ... Work target pile.

Claims (4)

In an apparatus for driving and / or pulling out a connected steel pipe pile in which a plurality of steel pipes are arranged in parallel, and two adjacent steel pipes are integrally connected by an elongated steel material,
Assuming a plane perpendicular to the center line of the steel pipe, the line connecting the center points of the two steel pipes is the X axis,
A plurality of chucks (2) are provided below the exciter,
A punching device for a connected steel pipe pile and a connected steel pipe sheet pile, wherein the chuck (2) is capable of gripping the two steel pipes at a symmetrical place with respect to the X axis. In an apparatus for driving and / or pulling out a connected steel pipe pile in which a plurality of steel pipes are arranged in parallel, and two adjacent steel pipes are integrally connected by an elongated steel material,
Assuming a plane perpendicular to the center line of the steel pipe, the line connecting the center points of the two steel pipes is the X axis, the center point of the two steel pipes located on the X axis is the coordinate origin O,
There is a chuck (2) below the exciter,
Punching of a connected steel pipe pile and a connected steel pipe sheet pile characterized in that the chuck (2) can hold the steel pipe at a coordinate origin O or at a symmetrical place with respect to the coordinate origin O. apparatus.   The chuck (2) is connected to the vibrator through a slide mechanism (9), and the slide mechanism slides or rotates relatively along a virtual plane orthogonal to the steel pipe. It has the function which can do, The punching apparatus of the connection steel pipe pile and connection steel pipe sheet pile of Claim 1 or Claim 2 characterized by the above-mentioned. The chuck includes a chucking plate (10A, 10B, 11A, 11B),
And the multiple types of these chucking plates are prepared, It is the structure which can be attached or detached and exchanged according to the shape and dimension of a connection steel pipe pile, The connection steel pipe of Claim 1 or Claim 2 characterized by the above-mentioned. Punching device for piles and connected steel pipe sheet piles.

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