JP2001064962A - Steel pile by bolt joining joint - Google Patents

Abstract

PROBLEM TO BE SOLVED: To eliminate a problem in the case of continuous connection by job site welding and a screw joint and surely connect them by a small number of bolts by joining upper and lower piles by bolts by using a joint member provided with a foot continuously connecting the end plate and a connection plate so as to set a prescribed interval in the direction of a pile axial line from an end plate where a connection plate joins to a pile end. SOLUTION: For a lower pile 2, a joint member 4 is attached to the upper end of a lower pile body pipe 2a, and for an upper pile 3, a joint member 5 is attached to the lower end of an upper pile body pipe 3a. The joint members 4, 5 are joined by bolts 6, and the upper and lower piles 2, 3 are connected. The joint members 4, 5 are made a same structure, and an end plate 8 is joined to the ends of the pile body pipes 2a, 3a. In addition, a traverse cross section crossed foot 10 continuously connects the end plate 8 and a connection plate 9 so as to set the connection plate 9 at a prescribed size and interval in the direction of a pile axial line from the end plate 8, and the end plate 8 and the connection plate 9 are joined and integrated by welding through the foot 10, and a plurality of bolt holes 11, ... are provided in parallel with the direction of the pile axial line so that the connection plate 9 avoids the foot 10.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a steel pile such as a steel pipe pile using a bolted joint.

[0002]

2. Description of the Related Art For example, in a steel pipe pile, a joint structure for connecting an upper pile and a lower pile has conventionally been used at a pile driving site.
At the upper end of the lower pile and the lower end of the upper pile,
Insert the piece-shaped tube so that it passes over it, and use the piece-shaped tube as a backing hardware to butt-weld the upper and lower piles, or screw the joint attached to the lower end of the upper pile to the upper end of the lower pile. Various joint structures for connection have been proposed, such as those that are screwed and connected to a threaded joint attached to a part.

[0003]

However, in connection by on-site welding, qualified welders and welding machines are required on site, and welding quality tends to vary due to on-site welding. Since the entire circumference must be welded, a lot of time is required for connection, and it is difficult to perform the work in rainy weather or strong wind.

[0004] In connection with a threaded joint, not only is the processing of the threaded portion of the joint troublesome, but also the work of connecting the upper and lower piles is made by rotating a long upper pile of, for example, 6 m and screwing it. It is laborious because it is complicated, and when mud bites into the screw part, it is necessary to perform troublesome cleaning of the screw part to remove it, and furthermore, a little If the upper pile is screwed into the lower pile in the event of tilting, the lower pile will rotate together with the upper pile during the screwing, and the upper and lower piles will be firmly connected. May not be connected.

An object of the present invention is to provide a new structure that eliminates such problems in view of the above-mentioned conventional problems.

[0006]

The above object is achieved by providing a joint member at an upper end of a lower pile and a joint member at a lower end of an upper pile, and bolting these joint members together to form a lower joint. A steel pile with a bolted joint for connecting a lower end of an upper pile to an upper end of a pile, wherein one of the joint members is an end plate joined to a pile end, a connecting plate, and a connecting plate. From the pile axis direction, leaving a predetermined dimension and spacing,
The connection plate has a connecting hole for bolt connection, which is parallel to the pile axis,
It is provided so as to avoid a foot and allow access for bolt connection from the side, and the other of the joint members is an end plate, a connection plate, like the one joint member,
It consists of the one having feet, or the end plate joined to the pile end, the connection part corresponding to the connection hole of the joint member is provided, these joint members joined to the upper and lower pile ends A steel pile with a bolted joint, wherein the upper and lower piles are joined together by bolt joining between the connecting plates or by bolt joining between the connecting plate and the end plate. Solved by

[0007] Since this steel pile has a structure in which the upper pile and the lower pile are connected by bolting, special skills and machines are not required for the connection between the upper pile and the lower pile, and the quality is stable and short. Can be joined and connected in time. It is not affected by the weather. Also, there is no need to form a connecting screw in the joint member as in the case of the threaded joint, and it is not necessary to rotate the long upper pile at the time of connection. The mud can be easily removed, and the upper pile can be easily connected to the lower pile even if the lower pile that has been previously driven slightly tilts, and the upper pile and the lower pile are securely joined. be able to.

In addition, at least one of the joint members provided at the upper end of the lower pile and the lower end of the upper pile has an end plate joined to the pile end, a connecting plate, and a connecting plate extending from the end plate to the axis of the pile. The connecting plate has a connecting hole for bolt connection, which is parallel to the pile axis, avoiding the foot, Since it is provided so as to allow access for bolt connection from one side, the following advantages are provided.

That is, the connecting plate is provided with a connecting hole for bolt connection oriented parallel to the pile axis, and has a structure in which the upper and lower piles are connected by connecting the bolts in the pile axis direction. Therefore, the vertical force, which is the main external force supported by the pile, does not act as a shearing force for the bolts.
The mechanical load on the bolts can be reduced, and the upper and lower piles can be securely joined and connected with a small number of bolts.

In addition, a connecting plate connected to an end plate connected to an end of one of the piles at an interval via a foot is connected to an end plate of the other pile or a connecting plate by bolts. ,
It is possible to connect bolts at a position close to the axis of the pile, and therefore it is possible to prevent the connection joint between the lower pile and the upper pile from protruding greatly outward, and to prevent the pile from penetrating the ground. It can be done smoothly.

[0011]

Next, embodiments of the present invention will be described with reference to the drawings.

The steel pile 1 of the first embodiment shown in FIGS. 1 (a), 2 and 3 comprises a steel pipe pile. In this steel pipe pile 1, 2 is a lower pile and 3 is an upper pile. The lower pile 2 has a joint member 4 attached to an upper end of a lower pile main pipe 2a, and the upper pile 3 has a joint member 5 attached to a lower end of an upper pile main pipe 3a. The upper and lower pile main pipes 2a and 3a are of the same size, and the upper and lower piles 2 and 3 are joined and connected by joining the joint members 4 and 5 with bolts 6.

The two joint members 4 and 5 have the same structure, 8 is an end plate, 9 is a connecting plate, and 10 is a foot. Both are made of steel. The end plate 8 is joined to the ends of the pile body pipes 2a, 3a, and the foot 10 allows the connecting plate 9 to have a predetermined size and interval from the end plate 8 in the pile axis direction. 8 and the connecting plate 9 are connected. The end plate 8 and the connecting plate 9 are designed to have the same or substantially the same plane size as the outer peripheral size of the pile main body tubes 2a, 3a, and are joined and integrated via the feet 10 by welding. The foot 10 has a cross shape in cross section, and exists in the plane of the end plate 8 and the connecting plate 9.
The connecting plate 9 is provided with a plurality of bolt connecting holes 11... Oriented in parallel with the pile axis so as to avoid the cross-shaped cross-shaped feet 10. It is provided with your heart in mind. The joining can be performed by passing the bolts 6 from between the end plate 8 and the connecting plate 9 to the connecting holes 11 of the connecting plate 9.

These joint members 4 and 5 are attached in advance in a factory or the like by melting the end plate 8 to the ends of the pile main pipes 2a and 3a, for example, by melting the entire periphery so as to cover the end openings. Can be

At the pile driving site, the connecting plate 9 of the joint member 5 at the lower end of the upper pile 3 is placed on the connecting plate 9 of the joint member 4 at the upper end of the lower pile 2 previously driven, and The bolts 6 are passed through the connecting holes 11 of the connecting plate 9 through the space between the connecting plate 9 and the end plate 8 and are bolted together with the nuts 12 so that the connecting plates 9 and 9 are bolted to each other with high strength. As described above, the upper pile 3 and the lower pile 2 are joined and connected by the joint members 4 and 5. Since the joints by the joint members 4 and 5 do not protrude to the side of the pile, the pile driving operation by the rotary press-fitting method or the like can proceed smoothly.

Although not shown, notches are formed in one of the connecting plates 9 in order to facilitate alignment of the connecting holes 11 when the connecting plates 9 are brought into a plane-aligned state. , Holes, small recesses, etc., and the other connecting plate,
A configuration may be used in which a projection that fits in is formed. In that case, by fitting them, the connection holes 11.
... can be brought into a proper alignment state.

In the steel pile 1 according to the second embodiment shown in FIGS. 1 (b), 4 and 5, the joint member 5 attached to the lower end of the upper pile body tube 3a is similar to the joint member described above. Although it has a structure having an end plate 8, a connecting plate 9, and a foot 10, the joint member 4 attached to the upper end of the lower pile main body tube 2a has the same or substantially the same plane as the outer peripheral size of the lower pile main body tube 2a. It consists only of an end plate 13 having a size.

The end plate 13 is provided with the joint member 5 of the upper pile 3.
The connecting portions 1 correspond to the positions of the connecting holes 11 of the connecting plate 9.
4 ... are provided. Each connecting portion 14 may have a structure in which a nut is attached to the back surface of the end plate 13 by welding and a screw hole of the nut is opened on the outer surface side of the end plate 13, or may be a simple hole. The bolt may be joined by a side bolt or the like, the end plate may be provided with a screw hole capable of being screwed to the bolt, or the end plate 13 may be embedded with a nut. Or may be of various configurations.

The joint member 4 composed of only the end plate 13 is also
At a factory or the like, it is attached to the upper end of the lower pile main body tube 2a in advance by, for example, melting the entire circumference so as to close the upper end opening. At the pile driving site, the connecting plate 9 of the joint member 5 at the lower end of the upper pile 3 is placed on the end plate 13 constituting the joint member 4 at the upper end of the lower pile 2 previously placed, and The bolts 6 are passed through the connecting holes 11 of the connecting plate 9 through between the connecting plate 9 and the end plate 8 of the joint member 5 of the upper pile 3,
This connecting plate 9 and the end plate 8 of the lower pile 2 are joined by high strength bolts. As described above, the upper pile 3 and the lower pile 2 are joined and connected via the joint members 4 and 5.

The third embodiment shown in FIGS. 1 (c), 6 and 7 is applied to the connection of the upper and lower piles 2, 3 when the outer diameters of the upper and lower pile main pipes 2a, 3a are different in size. It is. The end plates 8, 8 of the joint members 4, 5 have the same plane size as the outer peripheral size of the respective pile body pipes 2a, 3a.
The two connecting plates 9 and 9 have the same plane size as the plane size of one of the end plates, or these end plates 8 and 8
The connecting plates 9, 9
The bolts 6 are connected to each other, and the upper and lower piles 2 and 3 are joined and connected. As described above, according to the present invention, the upper stake 3 and the lower stake 2 having different outer diameters can be properly connected to each other in a form adapted to them. FIG.
Is a case where the joint member 4 attached to the upper end of the lower pile 2 is a joint member formed by the end plate 13.

FIG. 9 shows a portion where the steel pipe pile 1 and the foundation 16 are joined. A steel plate is usually attached to the pile head of the steel pipe pile 1 by welding. It is a thing. The joint member 4 may be composed of only the end plate 13 or the end plate 8, the connecting plate 9 and the foot 1.
0 may be combined and integrated by welding. The use of the piles with the joint members 4 and 5 attached to the upper end and the lower end of the pile body pipe, respectively, has the advantage that the work of attaching the steel plate to the pile head of the steel pipe pile driven into the ground can be omitted.

FIG. 10 shows an enlarged bottom plate 17 at the tip of the steel pipe pile 1.
In this case, the expanded bottom plate 17 is connected to the distal ends of the pile body pipes 2a and 3a by the joint members 4 and 5 of the present invention. When using an expanded bottom plate, the expanded bottom plate is usually welded to a pile body in advance at a factory or the like, and it is used by carrying it to the pile driving site, but projects to the side of the pile body Therefore, there is a drawback that the pile is bulky in loading and handling. Therefore, by using the joint members 4 and 5 as described above, the expanded bottom plate 17 and the pile main body tube 3a are connected by bolting, so that the expanded bottom plate 17 and the pile main body tube 3a are disassembled during transportation, It is possible to connect the expanded bottom plate 17 and the pile main body tube 3a on site, and the transportation can be performed efficiently without increasing the bulk.

Although the embodiment of the present invention has been described above, the present invention is not limited to this, and various modifications can be made without departing from the spirit of the invention. For example, in the above embodiment, the joint member 4 consisting of only the end plate 13 is attached to the upper end portions of the pile body pipes 2a and 3a,
0 is attached to the lower ends of the pile body pipes 2a, 3a, but the joint member 4 consisting of only the end plate 13 is attached to the lower ends of the pile body pipes 2a, 3a. It is good also as composition which attaches joint member 5 which consists of and connection board 9 and leg 10 to the upper end part of pile main pipe 2a, 3a. Further, as the foot 10, various types of feet such as those having a cross-sectional shape of "person" as shown in FIG. 11 may be used. Further, the connection hole in the present invention may be a notch-shaped one or the like that is opened on the peripheral surface of the connection plate.

[0024]

As described above, the steel pile with the bolted joint according to the present invention and the joint member of the bolted joint in the steel pile have the above-described structure. It is possible to eliminate problems that occur when connecting and joining the upper and lower piles and when connecting and joining the upper and lower piles using the screw joint. In addition, the upper and lower piles can be firmly joined and connected with a small number of bolts by reducing the mechanical load on the bolts, and the connection joint between the lower pile and the upper pile is outward. The pile can be smoothly penetrated into the ground by preventing the overhang of the pile.

[Brief description of the drawings]

FIG. 1A shows a first embodiment, FIG. 2B shows a second embodiment, and FIG. 3C shows a third embodiment, and is a cross-sectional side view of a joint structure of a steel pipe pile. It is.

FIG. 2 is a perspective view of the first embodiment, showing upper and lower piles separated.

FIG. 3 is a perspective view of the first embodiment, in which a joint member is also separated.

FIG. 4 is a perspective view showing the second embodiment and showing upper and lower piles in a separated state.

FIG. 5 is a perspective view showing the second embodiment, in which a joint member is also in a separated state.

FIG. 6 is a perspective view showing the third embodiment and showing upper and lower piles in a separated state.

FIG. 7 is a perspective view showing the third embodiment, in which a joint member is also in a separated state.

FIG. 8 is a perspective view of the fourth embodiment, showing upper and lower piles separated.

FIGS. 9A and 9B are cross-sectional views each showing a joint between a pile head and a foundation.

FIG. 10 is a cross-sectional side view showing an example in which a joint member is applied to the connection between the pile body and the bottom plate.

FIG. 11 is a perspective view showing a modified example of a foot in a joint member.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Steel pipe pile (steel pile) 2 ... Lower pile 2a ... Lower pile main pipe 3 ... Upper pile 3a ... Upper pile main pipe 4 ... Joint member 5 ... Joint member 6 ... Bolt 8 ... End plate 9 ... Connecting plate 10 ... Foot DESCRIPTION OF SYMBOLS 11 ... Connection hole 12 ... Nut 13 ... End plate 14 ... Connection part

Claims (3)

[Claims] 1. A joint member is provided at an upper end of a lower pile, a joint member is provided at a lower end of an upper pile, and these joint members are bolted to each other, and a lower end of the upper pile is attached to an upper end of the lower pile. A steel pile with a bolted joint for connecting parts, one of the joint members is an end plate joined to a pile end, a connecting plate, and the connecting plate has predetermined dimensions in the pile axis direction from the end plate, The connection plate has a connecting hole for bolt connection, which is parallel to the pile axis, and has a connection hole for bolt connection from the side. The other of the joint members has an end plate, a connecting plate and a foot similarly to the one joint member, or is joined to a pile end. A connecting portion corresponding to a connecting hole of the joint member on the end plate; These joint members joined to the ends of the upper and lower piles are joined together by bolt joining between the connecting plates or bolt joining between the connecting plate and the end plate, and the upper and lower piles are connected. A steel pile with a bolted joint, which is characterized by being made. 2. The steel pile according to claim 1, comprising a steel pipe pile. 3. A joint member of a bolted joint for connecting a plurality of steel pile components in a pile axis direction, wherein an end plate joined to the steel pile component, a connection plate, and a connection plate are connected to each other. And a leg connecting the plates so as to have a predetermined size and spacing from the plate in the direction of the pile axis, and a connecting hole for connecting a plurality of bolts parallel to the pile axis in the connecting plate. The joint member of the bolt joint type in the steel pile, wherein the joint member is provided so as to avoid a foot and to allow access for a bolt joint from a side.