WO2015071932A1

WO2015071932A1 - Steel sheet pile joining member

Info

Publication number: WO2015071932A1
Application number: PCT/JP2013/006696
Authority: WO
Inventors: 成明宮本
Original assignee: ヒロセ株式会社
Priority date: 2013-11-14
Filing date: 2013-11-14
Publication date: 2015-05-21

Abstract

[Problem] To provide a joining member that can be easily welded to a steel sheet pile and allows the steel sheet pile to be reused after being disassembled and that can maintain a wide range of joint angles. [Solution] This joining member mutually couples a first steel sheet pile and a second steel sheet pile and is characterized by comprising a fitting portion that can couple by fitting into a joining portion of the first steel sheet pile, a coupling portion that is integrally formed on another side of the fitting portion and that can couple to a joining portion of the second steel sheet pile, and a welding portion that is integrally formed on the boundary position of the coupling portion and the fitting portion and that extends toward a side face of the first steel sheet pile, and characterized in that an end of the welding portion is welded to the side face of the first steel sheet pile and has a neck portion that can be severed.

Description

Steel sheet pile joint

The present invention relates to a joining member for connecting steel sheet piles to each other at a constant angle.

Joining to connect steel sheet piles at a certain angle in order to construct steel sheet pile walls along the curve of the normal line at the corner of the site in steel sheet pile work for pier construction, bridge pier column foundation work, etc. A member is used.
In the construction of sheet pile walls, in recent years, a method of press-fitting with a relatively quiet piler is becoming the mainstream, instead of placing with a vibro hammer with a loud work sound.

Conventional joining members have the following drawbacks.
<1> The work efficiency of welding is poor.
Conventionally, since the joining member 60 does not have an appropriate welding point, the joint portion 51 and the side surface 52 of the steel sheet pile 50 and the side surface of the joining member 60 are welded (FIG. 6).
In that case, the welded portion was narrow (FIG. 6A), there was a gap in the welded portion (FIGS. 6A and 6B), and welding defects were likely to occur, and the welding work efficiency was poor.
<2> Products are easily damaged during dismantling.
Conventionally, when the steel sheet pile 50 and the joining member 60 are disassembled after the temporary removal, the welded portion is melted by the gas cutting torch 70 (FIG. 7).
In that case, the steel sheet pile 50 and the joining member 60 were damaged by the flame of the torch, and neither could be reused as a product.
<3> Piler press-fit is not possible.
Conventionally, when dealing with a wide range of joining angles, an S-shaped hook-shaped joining member 60 ′ is joined to the steel sheet pile 50. However, when the S-shaped hook-type joining member 60 ′ is joined to the steel sheet pile 50, it protrudes in the rear direction of the steel sheet pile 50 and interferes with the inner wall of the chuck portion of the pillar (FIG. 8), so it can be used for press fitting by the pillar. There wasn't.
<4> The joining angle is limited to a certain range.
For this reason, when press-fitting the steel sheet pile 50 with a pillar, the joining member 60 may be joined toward the front direction of the steel sheet pile 50. In this case, the joining member 60 has to be reduced in size due to space restrictions in the chuck portion, and the joining angle of the joining member 60 with respect to the steel sheet pile 50 is limited to a certain narrow range. Therefore, the degree of freedom in designing the sheet pile wall was low.

An object of the present invention is to provide a joining member having at least one of the following effects.
<1> The welding to the steel sheet pile is easy.
<2> There is little damage to the product during dismantling.
<3> It can be press-fitted with a pillar.
<4> The steel sheet pile can be joined at a wide range of angles.

In order to solve the above-described problems, the joining member of the present invention is a joining member for connecting the first steel sheet pile and the second steel sheet pile to each other, and can be connected by fitting into a joint portion of the first steel sheet pile. Formed integrally on the other side of the fitting portion, the connecting portion connectable with the joint portion of the second steel sheet pile, and integrally formed at the boundary position between the connecting portion and the fitting portion, A welded portion that protrudes in the direction of the side surface of the steel sheet pile, and the welded portion has a neck portion that can be cut while joining the end to the side surface of the first steel sheet pile. *

The joining member of the present invention is characterized in that the connecting portion has an opening that can be connected to the joint portion of the second steel sheet pile, and the cross section has a bowl shape.

The joining member of the present invention is characterized in that the fitting portion has a reverse wedge shape whose cross section is thickened toward the end face.

The joining member of the present invention is characterized in that the welded portion has a support surface that can face the side surface of the first steel sheet pile and a weld surface formed adjacent to the support surface.

The joining member of the present invention is characterized in that the cross section of the tip of the welded portion exhibits a continuous curved shape.

In the joining member of the present invention, the protruding length of the welded portion is a length in a range in which a constant open space is formed between the side surface of the first steel sheet pile and the connecting portion, and the connecting portion does not interfere with the inner peripheral surface of the pillar. It is a feature.

Since the present invention has the above-described configuration, it has at least one of the following effects.
<1> Welding to a steel sheet pile is easy.
In the joining member of the present invention, the welded portion protrudes in the extending direction of the curved inner peripheral surface of the connecting portion, and the side surface of the steel sheet pile and the connecting portion are spaced apart by a certain distance. For this reason, the fixed open space for welding operations can be ensured between the side surface of the steel sheet pile and the connecting portion.
Moreover, since the attitude | position of a joining member is supported by two points, a welding part and a fitting part, at the time of temporary assembly, the attitude | position at the time of welding is stabilized.
Furthermore, rattling between the fitting portion and the steel sheet pile can be eliminated by temporarily welding the welded portion to the side surface of the steel sheet pile during temporary assembly.
For this reason, welding work is easy and construction efficiency is extremely high.
Moreover, the joining member of this invention forms the structure of the T joint provided with the groove | channel between the side surfaces of a steel sheet pile by providing a welding surface and a support surface in a welding part (FIG. 3A).
For this reason, the precision of welding work can be improved.
Moreover, since the support surface of a welding part adjoins the side surface of a steel sheet pile, the route width of a welding part is small.
For this reason, it is hard to produce a welding defect and to damage a steel sheet pile.
<2> It is difficult to damage the product during dismantling.
When disassembling, the joining member of the present invention melts the neck of the welded portion, not the welded portion with the steel sheet pile (FIG. 3B).
For this reason, a steel sheet pile and a joining member are not damaged with the flame of a torch, and the goods after disassembly can be reused.
<3> Press fitting with a pillar is possible.
The joining member of the present invention is fixed by the welded portion at a position where the outer peripheral surface of the connecting portion does not interfere with the inner wall of the chuck portion of the pillar.
For this reason, it can be press-fitted by a low-noise pillar.
<4> Selection of joining angle is possible.
The joining member of this invention can regulate a connection part to the position which does not interfere with the inner wall of a chuck | zipper part, ensuring the open space which can turn a steel sheet pile between the side surface of a steel sheet pile, and a connection part with a welding part.
For this reason, a plurality of joining members having different joining angles can be designed.
By properly using these multiple joining members, the angle for joining the steel sheet piles can be selected from a wide range, while having a size that fits in the chuck portion of the pillar, and the degree of freedom in designing the sheet pile wall can be increased. .

Explanatory drawing of the joining member which concerns on this invention. Explanatory drawing of 1st Example of this invention. Explanatory drawing of 1st Example of this invention. Explanatory drawing of 2nd Example of this invention. Explanatory drawing of 2nd Example of this invention. Explanatory drawing of the conventional joining member. Explanatory drawing of the conventional joining member. Explanatory drawing of the conventional joining member.

Hereinafter, the joining member of the present invention will be described in detail with reference to the drawings.
In addition, the description about the shape of the joining member in this specification represents the cross-sectional shape at right angles to the longitudinal direction of the joining member, unless otherwise indicated.

[Configuration of the Present Invention] (FIG. 1)
<1> Joining member.
The joining member 10 of this invention is a member which connects the 1st steel sheet pile 50a and the 2nd steel sheet pile 50b at a fixed angle.
The joining member 10 includes a connection part 20, a fitting part 30, and a welding part 40.
The joining member 10 can be manufactured with a steel material.

<2> Connection part.
The connection part 20 is a part which fits and connects with the joint part 51 of the 2nd steel sheet pile 50b.
The connecting portion 20 has a hook shape whose cross section can be fitted to the joint portion 51 of the second steel sheet pile 50b. That is, the connection part 20 continues in an arc shape from the fitting part 30 side toward the farthest end direction of the fitting part 30, and slightly bends to the inside of the arc in the vicinity of the farthest end of the fitting part 30. The tip of the bent portion has a substantially straight shape. In addition, the shape of the connection part 20 is not restricted to this, It can also be set as the continuous circular arc shape which does not have a linear part at the front-end | tip.
The hook-shaped inner surface of the connecting portion 20 is a smooth inner peripheral surface 21. The inner peripheral surface 21 continues from the tip of the connecting portion 20 to the side surface of the welded portion 40, and forms a ridge 43 that protrudes between the welded surface 42 of the welded portion 40.
A hook-shaped outer surface of the connecting portion 20 is a smooth outer peripheral surface 22. The outer peripheral surface 22 continues from the tip of the connecting portion 20 to the fitting portion 30.
In the state where the fitting part 30 is fitted with the joint part 51 of the first steel sheet pile 50a, the connecting part 20 has a shape in which the bowl-shaped opening 23 is opened to the side surface 52 side of the first steel sheet pile 50a.

<2.1> Opening angle.
The extension line of the hook-shaped tip of the connection part 20 and the normal direction line of the first steel sheet pile 50a passing through the outermost end of the end face of the fitting part 30 form the opening angle α (FIGS. 4A and 4B). .
By changing the tilt angle of the connection part 20 with respect to the fitting part 30, a plurality of types of joining members 10 having different opening angles α can be designed.

<3> A fitting part.
The fitting part 30 is a part which fits and connects with the joint part 51 of the edge part of the 1st steel sheet pile 50a.
The fitting part 30 exhibits the reverse wedge shape fitted with the joint part 51 of the 1st steel sheet pile 50a, ie, the cross-sectional shape which increases in thickness toward an end surface. In addition, the shape of the fitting part 30 is not restricted to this, It can be set as another well-known shape.
The surface of the fitting portion 30 on the opening 23 side, that is, the surface opposite to the outer peripheral surface 22 is continuous with the concave surface 45 of the welded portion 40.

<4> Welded part.
The welding part 40 is a part for welding the joining member 10 to the side surface 52 of the first steel sheet pile 50a at a predetermined interval.

<4.1> Projection direction of welded portion.
The welded portion 40 projects from the boundary position between the connecting portion 20 and the fitting portion 30 in the extending direction of the curved inner peripheral surface 21 of the connecting portion 20. In other words, it protrudes in a direction substantially orthogonal to the side surface 52 toward the side surface 52 of the first steel sheet pile 50a in a state where the fitting portion 30 is fitted to the joint portion 51 of the first steel sheet pile 50a.

<4.2> Projection length of the weld.
The protruding length of the welded portion 40 is such that the outer peripheral surface 22 of the connecting portion 20 is secured between the side surface 52 of the first steel sheet pile 50a and the connecting portion 20 while ensuring a certain open space in which the second steel sheet pile 50b can turn. It is the length of the range which does not interfere with the chuck | zipper part inner wall of a pillar shown in FIG.

<4.3> Support surface.
At the tip of the weld 40, there is a support surface 41 that faces the side surface 52 of the first steel sheet pile 50a.

<4.4> Welding surface.
A weld surface 42 adjacent to the support surface 41 is provided on the opening 23 side of the weld 40.
The weld surface 42 has a cross-sectional shape in which both ends are raised and the center is recessed.

<4.5> peak.
A raised peak 43 is formed between the welding surface 42 and the inner peripheral surface 21 of the connecting portion 20.

<4.6> Concave surface.
The welded portion 40 has a concave surface 45 adjacent to the support surface 41 on the fitting portion 30 side. The concave surface 45 is a surface that continues from the tip of the welded portion 40 to the side surface of the fitting portion 30, and has a circular arc shape that curves at the base portion of the welded portion 40.

<4.7> Neck.
A neck portion 44 for cutting the welded joining member 10 from the first steel sheet pile 50a is formed in a portion of the welded portion 40 sandwiched between the inner peripheral surface 21 and the concave surface 45.

<4.8> Other shapes.
In addition, the shape of the welding part 40 is not restricted to said form. That is, in another embodiment, the welded portion 40 does not clearly define the support surface 41, the weld surface 42, and the peak 43, and the cross section exhibits a continuous curved shape.
Moreover, the welding surface 42 can also be made into the planar shape without an unevenness | corrugation.

[Joint method of joining members]
Subsequently, a method for joining steel sheet piles using the joining member of the present invention will be described with reference to the drawings.

<1> Temporary assembly of joining members.
The end portions of the first steel sheet pile 50a and the second steel sheet pile 50b have a joint portion 51 that can be joined to the joining member 10 of the present invention. The shape of the joint part 51 is a larsen type in this example.
The fitting part 30 of the joining member 10 is inserted into the joint part 51 of the first steel sheet pile 50a along the axial direction and temporarily assembled (FIG. 2).
Since the fitting part 30 has a reverse wedge shape with a widened tip, the fitting part 30 is fitted into the joint part 51 and does not leave in a direction perpendicular to the longitudinal direction of the first steel sheet pile 50a.
In the temporarily assembled state, the welded portion 40 protrudes in the direction of the side surface 52 of the first steel sheet pile 50a, and the support surface 41 contacts the side surface 52 of the first steel sheet pile 50a. However, when there is play between the fitted portion 30 and the joint portion 51, the support surface 41 and the side surface 52 may be separated depending on the posture of the joining member 10.
Moreover, the attitude | position of the joining member 10 with respect to the 1st steel sheet pile 50a may be fixed by carrying out some temporary welding between the front-end | tip part of the welding part 40, and the side surface 52 of the 1st steel sheet pile 50a.

<2> Welding of connecting members to steel sheet piles.
In a state where the joining member 10 and the first steel sheet pile 50a are temporarily assembled, a gap between the end of the welding surface 42 and the side surface 52 of the first steel sheet pile 50a is known along the longitudinal direction of the first steel sheet pile 50a. Weld with welding means.
Conventionally, one end of the side surface of the joining member 60 is welded to the side surface 52 of the steel sheet pile 50 and the back surface of the joint portion 51 (FIGS. 6A and 6B). Therefore, sufficient work space is not ensured between the joining member 60 and the steel sheet pile 50, and welding is difficult.
On the other hand, the joining member 10 of the present invention has a spacer function in which the welded portion 40 separates the side surface 52 of the steel sheet pile 50 and the connecting portion 20, and ensures a sufficient open space for welding work. Welding work is easy.
Moreover, since the conventional joining member 60 was supported only in one fitting part, the attitude | position at the time of temporary assembly was unstable.
On the other hand, since the joining member 10 of the present invention supports the side surface 52 of the first steel sheet pile 50a in the support surface 41 of the welded portion 40 in addition to the fitting portion 30, the posture at the time of temporary assembly is stable, It is easy to perform welding work (FIG. 3A).
Furthermore, if the welding part 40 is temporarily welded at the time of temporary assembly, rattling between the fitting part 30 and the joint part 51 is eliminated, and the welding operation is further facilitated.
Further, the conventional joining member 60 does not have an appropriate portion for welding to the steel sheet pile 50, and is welded to the steel sheet pile 50 at the curved portion of the joining member 60 (FIGS. 6A and 6B). For this reason, the root | route space | interval of a welding part is large, and it has often produced a welding defect.
On the other hand, as for the joining member 10 of this invention, the welding part 40 has the support surface 41 and the welding surface 42, and the structure of the T joint provided with the groove | channel between the side surfaces 52 of the 1st steel sheet pile 50a. Since it forms, the precision of a welding operation is high and it is hard to produce a welding defect (FIG. 3A).

<3> Press fitting of the joining member and the first steel sheet pile.
The 1st steel sheet pile 50a which welded the joining member 10 is press-fit with a pillar.
Since the outer peripheral surface 22 of the connection part 20 is fixed by the welding part 40 in the position which does not interfere with the inner wall of a chuck | zipper part, the joining member 10 of this invention can be press-fitted with a pillar, joining with the 1st steel sheet pile 50a.
Subsequently, the subsequent second steel sheet pile 50b is press-fitted from above the press-fitted joint member 10. At this time, the vertical degree of the second steel sheet pile 50b is confirmed, and the tip of the joint portion 51 of the subsequent second steel sheet pile 50b is fitted into the gap inside the flange shape of the connecting portion 20 of the press-fitted joint member 10. Align so that.
And the joining angle of the 1st steel sheet pile 50a and the 2nd steel sheet pile 50b which follows is matched with a predetermined angle, and the 2nd steel sheet pile 50b is press-fit along the axial direction of the joining member 10. FIG.
In this example, the first steel sheet pile 50a welded to the joining member 10 was first press-fitted, and the second steel sheet pile 50b was press-fitted continuously. The 1st steel sheet pile 50a which welded the joining member 10 can also be press-fitted continuously.
Further, in this example, the press-fitting with a pillar is described as an example, but the steel sheet pile 50 can be joined in the same process by other known means such as placing by a placing machine.

<4> Joining angle of steel sheet pile.
In the joining member 10 of the present invention, in the state where the connecting portion 20 is fitted to the joint portion 51 of the second steel sheet pile 50b, the hook-shaped tip portion of the connecting portion 20 meshes with the joint portion 51 of the second steel sheet pile 50b. Since the outer peripheral surface 22 is regulated by the side surface 52 of the second steel sheet pile 50b, it does not leave in a direction perpendicular to the longitudinal direction of the second steel sheet pile 50b.
In addition, since there is a certain distance between the inner peripheral surface 21 of the connection part 20 and the outer peripheral surface of the joint part 51, the joint part 51 is not fixed in the connection part 20. And since the inner peripheral surface 21 of the connection part 20 exhibits a smooth circular arc shape, the joint part 51 can turn at a certain angle around the longitudinal axis of the connection part 20 while fitting with the connection part 20. it can.
Therefore, the angle which joins the 1st steel sheet pile 50a and the 2nd steel sheet pile 50b can be selected.

[How to remove the joining member]
Next, a method for removing the joining member of the present invention from the steel sheet pile will be described with reference to the drawings.

The joining member 10 of the present invention can be separated from the first steel sheet pile 50a by gas cutting the protruding neck portion 44 of the connecting portion 40 with a gas cutting torch 70.
Since the joining member 10 of the present invention burns out the neck portion 44 of the welded portion 40 away from the side surface 52 of the first steel sheet pile 50a, the first steel sheet pile 50a is not damaged by the flame of the gas cutting torch 70. Therefore, it becomes possible to reuse the first steel sheet pile 50a after being disassembled (FIG. 3B).
After separating the joining member 10, the tip of the welded portion 40 remaining on the side surface 52 of the first steel sheet pile 50a is scraped off by a grinder or the like.

[Example of combining multiple types of joint members]
Please refer to FIG. FIG. 5 is an explanatory view of the present example showing the joining state of the first steel sheet pile 50a and the second steel sheet pile 50b by two types of joining members 10a and 10b having different opening angles α.
The joining member 10 of the present invention can manufacture a plurality of joining members 10a, 10b, 10c,... Having different opening angles α by changing the tilt angle of the connecting part 20 with respect to the fitting part 30.

<1> The shape of the joining member.
The joining member 10a and the joining member 10b differ in the cross-sectional shape of the connection part 20 (FIG. 4).
The joining member 10b has a shape in which the flange shape of the connecting portion 20 of the joining member 10a is inclined in the direction of the outer peripheral surface 22, in other words, a shape in which the inclination angle of the connecting portion 20 with respect to the fitting portion 30 is widened.
Accordingly, the bonding member 10b has a smaller opening angle α than the bonding member 10a.
Since the other structure is the same, description is abbreviate | omitted.

<2> Joining angle.
In this example, the joining angle θ between the first steel sheet pile 50a and the second steel sheet pile 50b by the joining member 10a is 45 ° to 105 ° (FIG. 5A), and the joining angle θ by the joining member 10b is 105 ° to 165. ° (Figure 5B).
Therefore, the joint angle θ that can be selected in designing the sheet pile wall is 120 ° from 45 ° to 165 °.
In addition, in this example, although the combination of the joining member 10 was made into two types, the joining member 10a and the joining member 10b, it is not restricted to this, The joining member 10 of arbitrary opening angles (alpha) according to the convenience of construction, Arbitrary types can be combined.
For example, if the joining member 10 is a combination of three or more kinds, the range of the joining angle θ can be expanded from 0 ° to nearly 180 °.

<3> Effects of the present embodiment.
The conventional joining member 60 has a limitation in the shape of the joining member 60 due to space restrictions in the chuck portion of the pillar. For this reason, the joining angle θ is limited to a certain narrow range.
On the other hand, the joining member 10 of this example ensures the open space for the 2nd steel sheet pile 50b to rotate between the side surface 52 of the 1st steel sheet pile 50a, and the connection part 20 about the protrusion length of the welding part 40. FIG. However, a plurality of types of joining members 10 having different opening angles α can be designed by setting the connection portion 20 in a range that does not interfere with the inner wall of the chuck portion.
By combining these joining members 10, the joining angle θ between the first steel sheet pile 50a and the second steel sheet pile 50b can be selected from a wide range.
For this reason, the freedom degree of design of a sheet pile wall can be raised.

DESCRIPTION OF SYMBOLS 10 Joining member 10a Joining member 10b Joining member 20 Connection part 21 Inner peripheral surface 22 Outer peripheral surface 23 Opening 30 Fitting part 40 Welding part 41 Support surface 42 Welding surface 43 Peak 44 Neck part 45 Concave surface 50 Steel sheet pile 50a First steel sheet pile 50b 1st Two-steel sheet pile 51 Joint part 52 Side 60 Joining member 60 'Joining member 70 Gas cutting torch θ Joining angle α Opening angle

Claims

A joining member for connecting the first steel sheet pile and the second steel sheet pile to each other,
A fitting portion that can be connected to the joint portion of the first steel sheet pile; and
A connecting portion that is integrally formed on the other side of the fitting portion and is connectable to a joint portion of the second steel sheet pile,
Formed integrally at a boundary position between the fitting part and the connection part, and having a weld part protruding toward a side surface direction of the first steel sheet pile,
The welded portion has a neck portion that can be cut while joining an end portion thereof to the side surface of the first steel sheet pile.
Joining member.
2. The joining member according to claim 1, wherein the connection portion has an opening that can be connected to the joint portion of the second steel sheet pile, and the cross-section has a bowl shape.
The joining member according to claim 1 or 2, wherein the fitting portion has a reverse wedge shape in which a cross section increases in thickness toward an end surface.
The weld portion includes a support surface that can be opposed to a side surface of the first steel sheet pile, and a weld surface that is formed adjacent to the support surface. The joining member according to item.
The joining member according to any one of claims 1 to 3, wherein a cross section of a tip of the welded portion has a continuous curved shape.
The protruding length of the welded portion is a length within a range in which a constant open space is formed between the side surface of the first steel sheet pile and the connecting portion, and the connecting portion does not interfere with the inner peripheral surface of the pillar. The joining member according to any one of claims 1 to 5, wherein the joining member is characterized in that