JP7513453B2 - Joint structure - Google Patents

Description

The present invention relates to a joint structure used when joining structures such as beams to steel pipe piles via metal joints.

Conventionally, a joining structure has been used to join a structure (for example, H-shaped steel that constitutes the beams of a solar carport) to the head of an existing steel pipe pile using bolts and nuts. One such joining structure is one in which a connecting plate is joined to the head of the steel pipe pile, and then the structure is joined to this plate (see, for example, Patent Document 1). When joining a plate to the steel pipe pile from above the pile head, a nut is welded in advance at a specified position on the back side of the through hole in the pile head, and a bolt is screwed into this nut and fastened to join the steel pipe pile and the plate.

Patent No. 5699015

However, as described above, the task of welding nuts one by one to the designated position behind the pile head is time-consuming and requires precision, so it takes a considerable amount of time and tends to result in poor work efficiency.

The present invention aims to provide a joint structure that can improve work efficiency by eliminating the need to weld nuts to a specified position behind the head of a steel pipe pile.

One aspect of the present invention is a joint structure for joining a structure such as a beam to a steel pipe pile via a joint metal,
This is a joint structure in which the joint hardware is joined to the head of the steel pipe pile using a joining means that allows joining from one side of the joint without using a nut.

With this joint structure, when joining metal fittings to the head of a steel pipe pile, they can be joined from one side of the joint without using nuts. This eliminates the time and effort required to weld nuts one by one to the designated positions on the back of the pile head.

In the joint structure described above, the joint means may be inserted into a through hole provided in the head of the steel pipe pile.

In the joint structure of the above-mentioned type, the through hole provided in the head of the steel pipe pile may be a through hole pre-drilled in the head of the steel pipe pile.

In the above-described joint structure, the joint metal may have a long bolt hole that is a long hole for position adjustment.

In the above-described joint structure, the joint metal may consist of a joint plate having a bottom portion that is joined to the steel pipe pile and a flange portion to which the structure is joined.

In the above-described joint structure, the joint metal may be bent so that a step is formed between the bottom and the flange.

In the joining structure of the above aspect, the longitudinal direction of the long bolt hole formed from a long hole provided in the recess and the longitudinal direction of the multiple long bolt holes formed from long holes provided in the flange portion may be configured not to be parallel to each other.

The joining structure of the above-mentioned aspect may further include a plate-shaped metal member interposed between the flange portion of the joining metal member and the structure.

In the joining structure of the above-mentioned type, the plate metal may be provided with bolt holes that determine the relative positions of multiple joining bolts that join the joining metal to the structure.

In the above-described joint structure, the through hole provided in the head of the steel pipe pile may be drilled at the site where the joint metal is joined to the existing steel pipe pile.

In the joint structure described above, the through holes may be drilled at a position offset from the core of the pile to eliminate misalignment of the steel pipe pile at the site.

In the above-described joint structure, the joint hardware may be a joint plate having a bottom portion that is joined to the steel pipe pile using a joint bolt, and a flange portion to which the structure is joined using a joint bolt.

In the joining structure of the above aspect, the bolt holes for the joining bolts provided at the bottom of the joining plate may be through holes that do not have play for position adjustment.

In the joining structure of the above aspect, the bolt holes for the joining bolts provided at the bottom of the joining plate may be through holes that do not have play for position adjustment.

In the above-described joint structure, the joint means may be a one-sided bolt.

The present invention improves work efficiency by eliminating the need to weld nuts to a designated location on the back of the pile head of a steel pipe pile.

1 is a view showing an example of a main part of a joint structure according to the present invention, viewed from a direction perpendicular to the longitudinal direction of an H-shaped steel beam. FIG. 2 is a diagram showing a joint structure as viewed from a direction along the longitudinal direction of the H-shaped steel. 1A is a plan view of an intervening plate, FIG. 1B is a front view of an intervening plate and a joining plate, and FIG. 1C is a bottom view of the joining plate in a first embodiment of the present invention. 13A is a plan view of an intervening plate, FIG. 13B is a front view of the intervening plate and a joining plate, and FIG. 13C is a bottom view of the joining plate in a second embodiment of the present invention. 1A is a plan view of an intervening plate, FIG. 1B is a front view of the intervening plate and the joining plate, and FIG. 1C is a bottom view of the joining plate. FIG. 13 is a diagram illustrating how, when the pile core of the steel pipe pile is shifted in the X direction from a predetermined position P, the position of the H-shaped steel is shifted in the X direction along the bolt hole to adjust the position. FIG. 11 is a diagram illustrating a steel pipe pile having a through hole drilled therein so as to eliminate misalignment at a construction site, illustrating a second embodiment of the present invention. This is a diagram showing a joint structure in which a joint plate is joined using a through hole drilled in a steel pipe pile at a construction site, and an H-shaped steel is further joined via an intervening plate. 1A is a diagram illustrating a state in which a cover member is welded to the head of a steel pipe pile, and FIG. 1B is a diagram illustrating a state in which a joining plate is joined to the cover member, which illustrates another example (1) of a joining means. This illustrates another example (2) of the joining means, in which (A) a bolt or the like is hooked onto the back side of the head of the steel pipe pile, and (B) a joining plate is joined to the cover member using the bolt or the like. FIG. 11 is a diagram illustrating another example (3) of a connecting means, showing (A) a connecting member and a steel pipe pile before their heads are inserted into the through holes of the cover member, and (B) the structure of the cover member as viewed from the bottom. FIG. 11 is a diagram illustrating another example (3) of the connecting means, showing (A) the connecting member and the steel pipe pile after the head is inserted into the through hole of the cover member, and (B) the structure of the cover member as viewed from the bottom. FIG. 11 is a diagram illustrating another example (3) of the joining means, showing a state in which a joining plate is joined to a lid member using a joining member. 11A and 11B are diagrams illustrating another example (4) of a connecting means, showing (A) the structure of a cover member seen from above, and (B) a steel pipe pile with a through hole at the head. 13A is a diagram illustrating a joint plate viewed from above, and FIG. 13B is a diagram illustrating a steel pipe pile with a through hole and a joint plate, explaining another example (4) of a joint means. FIG. 13 is a diagram illustrating another example (4) of the joining means, showing a state in which a joining plate is joined to a steel pipe pile using a wire member. FIG. 11 is a diagram illustrating another example (5) of a joining means, showing (A) an umbrella-shaped structure inserted into a hole in the head of a steel pipe pile, (B) a part of the umbrella-shaped structure opened, and (C) a joining plate joined using the umbrella-shaped structure. FIG. 13 is a diagram illustrating another example (6) of a joining means, showing (A) a steel pipe pile having a male thread on the outer periphery of the head, (B) a joining plate having a female thread on the bottom, and (C) a joining plate and a steel pipe pile joined by screwing together the male and female threads. FIG. 13 is a diagram illustrating another example (6) of a joining means, showing (A) a steel pipe pile having a male thread on the outer periphery of the head, (B) a joining plate having a female thread on the bottom, and (C) a joining plate and a steel pipe pile joined by screwing together the male and female threads.

The following describes a preferred embodiment of the present invention with reference to the drawings.

[First embodiment]
A joint structure according to a first embodiment of the present invention is shown (see Figs. 1 to 3, etc.). The joint structure 1 according to this embodiment is a structure for joining a structure (H-shaped steel 200 constituting a beam of a solar carport, as an example) to a steel pipe pile 100 via a joint plate (joint metal) 10 and an intervening plate (plate metal) 20. In the following, for convenience, the longitudinal direction of the H-shaped steel 200 is described as the X direction, and the width direction is described as the Y direction (see Figs. 1 and 2).

The steel pipe pile 100 is a pile that is buried in the ground at the construction site of a structure and forms a foundation. In this embodiment, a steel pipe pile 100 is used in which a through hole 102 is drilled in advance, for example, in the center of the head 101 (see Figure 1, etc.).

The joining plate 10 is a type of joining hardware for joining a steel pipe pile 100 and an H-shaped steel 200. In this embodiment, a member having a bent shape having a bottom 11 joined to the steel pipe pile and flanges 12, 13 to which the H-shaped steel 200 is joined is adopted as the joining plate 10 (see FIG. 3, etc.). The bottom 11 and the flanges 12, 13 are configured with flat surfaces parallel to each other. Steps 14, 15 are provided between the flanges 12 and the bottom 11, and between the bottom 11 and the flanges 13, respectively, to form steps. In addition, the joining plate 10 is provided with bolt holes 11A, 12A, 12B, 13C , 13D for joining (see FIG. 3, etc.).

The bolt hole 11A is a joining hole provided in the bottom portion 11, and is used when joining the joining plate 10 to the head portion 101 of the steel pipe pile 100 with a bolt or the like. The bolt holes 12A and 12B are joining holes provided in the flange portion 12, and the bolt holes 13C and 13D are joining holes provided in the flange portion 13, and are used when joining the H-shaped steel 200 and the joining plate 10 with a joining bolt 41 and a joining nut 42 (see FIG. 3, etc.).

These bolt holes 11A, 12A, 12B, 13C , and 13D are formed as long holes (loose holes). For example, in this embodiment, the bolt holes 12A, 12B, 13C , and 13D are long holes that are parallel to each other and elongated in the X direction, and the bolt hole 11A is a long hole that is elongated in the Y direction (see FIG. 3, etc.). In this way, with the bolt hole 11A formed as a long hole provided in the bottom 11 and the bolt holes 2A, 12B, 13C , and 13D formed as long holes that extend in a direction not parallel to the bolt hole 11A, the pile core 100C of the steel pipe pile 100 can be adjusted in any direction from the predetermined position P. That is, when the pile core 100C is displaced in the X direction from the predetermined position P (displacement amount X1), the relative position of the H-beam 200 can be shifted in the X direction along the bolt holes 12A, 12B, 13C , and 13D by the same amount (displacement amount X1) to adjust the position so that the pile core displacement in the X direction is eliminated (see FIG. 6). Also, when the pile core 100C of the steel pipe pile 100 is displaced in the Y direction from the predetermined position P, the H-beam 200 can be shifted in the Y direction together with the joint plate 10 along the bolt hole 11A to adjust the position so that the pile core displacement in the Y direction is eliminated (see FIG. 2).

The intermediate plate 20 is a plate-shaped metal interposed between the flange portions 12, 13 of the joining plate 10 and the H-shaped steel 200. As an example, in this embodiment, a rectangular intermediate plate 20 is adopted in which bolt holes 20A, 20B, 20C, and 20D for passing the joining bolts 41 are provided at the four corners (see FIG. 3, etc.). In addition, in this embodiment, unlike the conventional structure (see FIG. 5, in which the reference numerals are indicated by dashes and are indicated as "10'", etc.), these bolt holes 22A, 22B, 23C, and 23D are formed as, for example, circular holes provided at positions that define the relative positions of the joining bolts 41 when joining the joining plate 10 and the H-shaped steel 200 (see FIG. 3, etc.). In the case where the bolt holes 12A, 12B, 13C , and 13D are elongated holes (loose holes) as in the joint structure 1 of this embodiment, the positions can be adjusted so that there is no misalignment of the pile core, but the work of fastening the fastening bolts 41 and the fastening nuts 42 while searching for the optimal position of the fastening bolts 41 in each of the bolt holes 12A, 12B, 13C , and 13D and adjusting the position several times tends to be troublesome and time-consuming. In this regard, when the intermediate plate 20 as described above is used, the fastening work can be performed while determining the relative positions by temporarily fastening each fastening bolt 41 in each of the bolt holes 20A, 20B, 20C, and 20D formed as a circular hole, so that fine adjustment work is unnecessary, and it is possible to reduce the effort and time. In addition, the shape of the bolt holes 20A, 20B, 20C, and 20D is not particularly limited as long as there is little gap (play) so as to determine the relative position of the fastening bolt 41, and in addition to the circular hole shown as an example, they can be rectangular or polygonal.

In addition, in the joint structure 1 of this embodiment, when joining the joining plate 10 to the head 101 of the steel pipe pile 100, a joining means is used that allows joining from one side of the joint without using a nut. In the conventional structure, it was necessary to weld a nut to the back side of the head 101 to match the existing pile head 102 of the steel pipe pile 100, and then screw a bolt into it to join the joining hardware, but by adopting a joining means such as that of this embodiment, it is possible to eliminate the work and effort of welding a nut.

As described above, there are various specific examples of joining means that can join from one side of the joint without using a nut, and they are not particularly limited. As an example, in this embodiment, a one-sided bolt 30 is used as such a joining means (see Figure 6, etc.). To omit detailed explanation here and only explain the outline, the pin of the one-sided bolt 30 is inserted into the through hole 102 of the steel pipe pile 100, the pin is fixed, and the nut part is rotated to form a bulb head on the back of the pile head. When the nut part is further rotated, the shear washer is sheared, the introduction of axial force into the member begins, the pintail breaks, and tightening is completed. As such a one-sided bolt 30, a known device such as a conventional high-strength one-sided bolt can be used.

Second Embodiment
A joining method and a structure using the method according to a second embodiment of the present invention are shown (see Figs. 7 and 8, etc.). In this embodiment, a through hole 102 is drilled in a head 101 of an existing steel pipe pile 100 at the construction site, and then a joining plate 10 is joined to the steel pipe pile 100.

When drilling through holes 102 in steel pipe piles 100 at the site, it is preferable to drill them at a position offset from the pile core 100C so as to eliminate the misalignment of the existing steel pipe pile 100 at the site. In other words, if the steel pipe pile 100 is misaligned and the position of the pile core 100C is offset from the intended position P (misalignment occurs), drilling through holes 102 at the intended position P (see Figure 7) can individually absorb the individual misalignments that have occurred in the steel pipe piles 100, and it becomes possible to position the joint plate (joint metal) 10 that forms the base of the H-beam 200 as originally planned (see Figure 8).

The existing steel pipe piles that are the subject of this embodiment and that do not yet have through holes include not only steel pipe piles 100 that have been buried at the site without having through holes in the head 101, but also steel pipe piles 100 that have a structure in which a steel pipe with a lid member attached at the site or a lid-shaped head 101 is attached later by welding to an existing steel pipe pile 100 without a pile head.

In addition, the configuration of the joining plate 10 and the intermediate plate 20 in this embodiment is basically the same as that of the first embodiment, but in this embodiment, the bolt holes 11A, 12A, 12B, 13C, and 13D of the joining plate 10 are holes that are not loose holes (for example, circular holes) (see FIG. 4). In other words, in this embodiment, where the through holes 102 are drilled on-site to absorb the misalignment, the positional deviation correction is completed when the through holes 102 are drilled at the predetermined position P where the joining plate 10 should be, so there is basically no need for subsequent position adjustment work. Therefore, there is no need to make the bolt holes 11A, 12A, 12B, 13C, and 13D loose holes, and they can be circular holes or other shapes (rectangles, polygons, etc.) that do not have play for position adjustment.

The above-mentioned embodiment is one example of a suitable implementation of the present invention, but is not limited thereto and can be modified in various ways without departing from the gist of the present invention. For example, in the above-mentioned embodiment, an example was described in which the one-sided bolt 30 is used to join the joining plate 10 to the head 101 of the steel pipe pile 100, but the one-sided bolt 30 described here is merely one specific example of a joining means that can be used to join the steel pipe pile 100 without the trouble of welding a nut to a specified position on the back of the head of the steel pipe pile 100. In addition to the one-sided bolt 30, the joining plate 10 can be joined to the head 101 of the steel pipe pile 100 using each of the means shown below as examples (1) to (7).

(1) Stud bolts, etc. A connecting member 31 such as a stud bolt or a rod-shaped member (including threaded rebar, screw, round steel, etc.) is welded to a cover member 103, and then welded to the steel pipe pile 100, and these stud bolts, etc. are used as the connecting means 30 (see FIG. 9 ). By welding the connecting member 31 such as a stud bolt or a rod-shaped member to the connecting plate 10, the connecting plate 10 can be connected to the steel pipe pile 100.

(2) Hooking structure The head of a connecting member 31 such as a bolt is hooked to one end of the head 101 of the steel pipe pile 100 (at the rear side of the cover member 103) with an end shape structure larger than the diameter of the through hole 102, and used as the connecting means 30 (see FIG. 10). A reinforcing bar joint structure, a screw joint structure, pressure welding, etc. can be used as the hooking means 104 for hooking the head of the connecting member 31 to the inner peripheral surface of the steel pipe pile 100. The connecting plate 10 can be joined to the steel pipe pile 100 by welding the connecting member 31 and the connecting plate 10 together.

(3) Hook-shaped structure A non-circular through hole (e.g., cross hole) 102 is provided in the cover member 103 of the steel pipe pile 100 (see FIG. 11), and the head of a connecting member 31 with a non-circular head (e.g., a cross-shaped bolt or bar) is inserted into the through hole 12 and rotated, for example, by 45° to prevent it from coming out. This structure is used as the connecting means 30 (see FIGS. 12 and 13). It is preferable to provide a locking member 105 on the back side of the cover member 103 to lock the head of the connecting member 31 and prevent it from rotating in the reverse direction (see FIGS. 11 and 12). The connecting plate 10 can be joined to the steel pipe pile 100 by welding the connecting member 31 and the connecting plate 10 together (see FIG. 13).

(4) Wire A through hole 106 for passing the wire member 32 through is provided in the cover member 103 of the steel pipe pile 100 (see FIG. 14), and a through hole 16 for passing the wire member 32 through is similarly provided in the joining plate 10 (see FIG. 15). The wire member 32 is passed through these through holes 106 and 16 and wound around the through hole 106, whereby the joining plate 10 can be joined to the head 101 of the steel pipe pile 100 (see FIG. 16).

(5) Umbrella-shaped structure The joining plate 10 is joined to the steel pipe pile 100 by using a umbrella-shaped structure 33 that opens in a umbrella shape after being inserted into the through-hole 102 at the head 101 of the steel pipe pile 100 and prevents the joining plate 10 from coming out of the through-hole 102 (see FIG. 17). Welding can be used to join the joining plate 10 (see FIG. 17(C)).

(6) Male thread structure A male thread structure is used in which a male thread 107 is provided on the outer periphery of the head 101 of the steel pipe pile 100 (see FIG. 18(A)). A female thread 17 is provided on the bottom 11 of the joining plate 10 so that the male thread 107 can be screwed into it (see FIG. 18(B)). By screwing the female thread 17 into the male thread 107, the joining plate 10 can be joined to the steel pipe pile 100 (see FIG. 18(C)).

(7) Female thread structure A female thread structure is used in which a female thread 108 is provided on the inner circumference of the head 101 of the steel pipe pile 100 (see FIG. 19(A)). A disk portion 18 that protrudes downward is provided on the bottom 11 of the joining plate 10, and a male thread 19 is provided on the peripheral surface of the disk portion 18 (see FIG. 19(B)). The male thread 19 and the female thread 108 are screwed together to join the joining plate 10 to the steel pipe pile 100 (see FIG. 19(C)).

The present invention is suitable for use in connection structures used when joining structures such as beams to steel pipe piles via metal joints.

1... Joint structure 10... Joint plate (joint metal)
11... bottom portion 11A... bolt hole 12, 13... flange portion 12A, 12B, 13C, 13D... bolt hole 14, 15... step portion 16... through hole 17... female screw 18... disk portion 19... male screw 20... intermediate plate (plate-shaped metal member)
20A, 20B, 20C, 20D... (defining relative positions) Bolt holes 30... One-sided bolt (connecting means)
31...Joining member (joining means)
32...Wire member (joining means)
33... Umbrella-shaped structure (jointing means)
41... Joint bolt (jointing means)
42... Joint nut (joint means)
100... Steel pipe pile 100C... Pile core 101... Head 102... Through hole 103... Cover member 104... Hooking means 105... Locking member 106... Through hole 107... Male screw 108... Female screw 200... H-beam (structure)
P: Predetermined position X1: Displacement of the pile core from the predetermined position P in the X direction

Claims (11)

A joint structure for joining a beam to a steel pipe pile via a joint metal,
The joint metal is joined to the head of the steel pipe pile using a joining means that can be joined from one side of the joint portion without using a nut,
The metal joint has a long bolt hole which is a long hole for position adjustment,
The joint metal comprises a joint plate having a bottom portion joined to the steel pipe pile and a flange portion to which the beam is joined,
The metal joint is bent so that a step is formed between the bottom and the flange portion,
The longitudinal direction of the bolt hole formed by the long hole provided in the bottom portion and the longitudinal direction of the plurality of bolt holes formed by the long holes provided in the flange portion are not parallel to each other,
A joint structure in which the longitudinal direction of a plurality of bolt holes each consisting of a long hole provided in the flange portion is the longitudinal direction of the beam. The joint structure according to claim 1, in which the joint means is inserted into a through hole provided in the head of the steel pipe pile. The joint structure according to claim 2, wherein the through hole provided in the head of the steel pipe pile is a through hole pre-drilled in the head of the steel pipe pile. The joint structure according to claim 1 , further comprising a metal plate interposed between the flange portion of the metal joint and the beam . The joining structure according to claim 4 , wherein the metal plate has bolt holes that define relative positions of a plurality of joining bolts that join the joining metal plate and the beam . The joint structure according to claim 2, wherein the through hole provided in the head of the steel pipe pile is drilled at the site where the joint metal is joined to the existing steel pipe pile. The joint structure according to claim 6, wherein the through holes are drilled at a position offset from the core of the pile so as to eliminate misalignment of the steel pipe pile at the site. The joint structure according to claim 7, wherein the joint hardware is a joint plate having a bottom portion joined to the steel pipe pile using a joint bolt and a flange portion joined to the beam by a joint bolt. The joining structure according to claim 8, wherein the bolt holes for the joining bolts provided in the bottom of the joining plate are through holes that do not have play for position adjustment. The joining structure according to claim 8 or 9, wherein the bolt holes for the joining bolts provided in the flange portion of the joining plate are through holes that do not have play for position adjustment. The joining structure according to any one of claims 1 to 10, wherein the joining means is a one-sided bolt.