JP6584042B1 - Steel pipe pile connection member - Google Patents

Abstract

An object of the present invention is to provide a steel pipe pile connecting member that can easily connect a steel pipe pile used to support a structure such as a building on soft ground, and has a strong structure. A steel pipe pile connecting member (100) includes a first connecting member (20) and a second connecting member (30). The first connecting member includes a first protruding portion (21) and a second protruding portion (22), and the other second connecting member. In the state of being connected by providing the third protrusion 31, it is possible to provide three vertical contact surfaces 50. As a result, when bending stress is applied to the steel pipe 10 and the steel pipe 12, the shear stress relating to the locking pin 40 is distributed to the three cross sections, and the steel pipe pile connection member 100 having a strong connection structure can be provided. It becomes. [Selection] Figure 1

Description

  TECHNICAL FIELD The present invention relates to a steel pipe pile connecting member used for a steel pipe pile that is rotationally penetrated into a ground used for supporting a structure such as a building in soft ground.

  In general, when a building is constructed in a place where the ground is not soft enough to support the ground, a concrete pile or a steel pipe pile is inserted into the hard ground existing underground with a construction machine to secure the support.

  Since concrete piles are cheaper than steel pipe piles and have a high bearing capacity, they have been used in many construction sites.

  However, in the case of a concrete pile, the length of the pile cannot be easily adjusted at the construction site, and there is a problem that residual soil is generated.

  On the other hand, the length of steel pipe piles can be easily adjusted at the construction site by cutting or welding, and since no residual soil is generated, it is often used particularly in construction in urban areas.

  Here, since the length of the steel pipe used for the steel pipe pile is usually 5 to 6 m, the depth of the stratum (referred to as a support layer) that reaches the tip of the steel pipe pile and stops in an intruded state is 6 m or more. If it is, the steel pipe will be connected and used.

  When connecting steel pipes, there is also a method of connecting the steel pipes directly by welding, but since welding work at the construction site takes time and cost, in general, connecting members for steel pipe piles are attached in advance to the steel pipe, In many cases, steel pipes are connected by connecting connecting members at a construction site.

  Here, the performance required for the connecting member for steel pipe piles is required to be a vertical supporting force, a vertical pulling force, a proof strength against torsional force, and a proof strength against bending stress.

  Of these, the bending stress that is most likely to be a problem is the bending stress generated by an earthquake or the like, and in the design of the connecting member for steel pipe piles, the main purpose is to ensure the resistance to this bending stress.

  Therefore, for example, a steel pipe pile construction jig and a steel pipe pile construction method as in Patent Document 1 have been proposed.

JP 2010-138687 A

  According to Patent Document 1, the connecting female member 4 and the connecting male member 5 are connected to the connecting pin 6, and six connecting pins 6 are provided as shown in FIG. 3.

  However, actually, if the connecting female member 4 and the connecting male member 5 as in Patent Document 1 are connected by the connecting pin 6 and an attempt is made to ensure the strength against bending stress required for the steel pipe pile, the connecting pin 6 is almost the same as the steel pipe pile. Necessary for the entire circumference, in which case there was a problem that the yield strength against the vertical pull-out force and torsional force might be insufficient.

  In view of this problem, an object of the present invention is to provide a steel pipe pile connecting member that satisfies the required performance required for a steel pipe pile while being able to perform a quick connection operation at a construction site.

  (1) A steel pipe pile connecting member according to the present invention is a steel pipe pile connecting member that connects cylindrical steel pipe piles that rotate and penetrate into the ground, and the steel pipe pile connecting member includes a first connecting member and a second connecting member. The first connecting member and the second connecting member include at least three vertical contact surfaces at a connecting portion in a state where the first connecting member and the second connecting member are connected to each other.

  (2) Moreover, the steel pipe pile connection member which concerns on this invention is the steel pipe pile connection member as described in (1), The said vertical direction contact surface is the said vertical direction inside the said vertical direction contact surface of the outer side of the said steel pipe pile. The contact surface is the same as or longer than the longitudinal direction of the steel pipe pile.

  (3) Moreover, the steel pipe pile connection member which concerns on this invention is the steel pipe pile front-end | tip member as described in (1) or (2), The said 1st connection member and said 2nd connection member connect the said steel pipe pile connection member. In this state, it is fixed by at least two locking pins.

  (4) Moreover, the steel pipe pile connection member which concerns on this invention in the steel pipe pile connection member in any one of (1) to (3) WHEREIN: The said vertical direction contact surface is provided with a groove part, It is characterized by the above-mentioned.

  (5) Moreover, the steel pipe pile connection member which concerns on this invention is a steel pipe pile connection member as described in (4), Said 1st connection member and said 2nd connection member are cyclic | annular locking material insertion holes in at least one surface. It is characterized by providing.

  (6) Moreover, the steel pipe pile connection member which concerns on this invention is a steel pipe pile connection member as described in (5), It is cyclic | annular in a part of said groove part of either said 1st connection member or said 2nd connection member. A locking material fixing hole is provided.

  According to the steel pipe pile connecting member described in (1), by providing three vertical contact surfaces, it is possible to disperse the shear stress applied to the locking pin when bending stress is generated in the steel pipe in three places. Thus, a strong connection structure can be provided.

  According to the steel pipe pile connecting member described in (2), since the contact surface is long toward the inside of the steel pipe, that is, the protrusion is long, the outer side is connected when the first connecting member and the second connecting member are connected at the construction site. It can be easily seen from the position and positioning becomes easy.

  According to the steel pipe pile connection member described in (3), stress concentration related to the steel pipe pile connection member can be prevented by providing at least two locking pins, and a stronger connection structure can be realized.

  According to the steel pipe pile connecting member described in (4), it is possible to connect the first connecting member and the second connecting member with the annular locking member by providing the groove portion, and it is possible to make the structure stronger. It becomes.

  According to the steel pipe pile connecting member according to (5), the annular locking member is inserted later after the first connecting member and the second connecting member are joined at a predetermined position by providing the annular locking material insertion hole. Is possible.

  According to the steel pipe pile connecting member described in (6), the annular locking material fixing hole is provided in the groove portion, so that the annular locking material can be installed at a predetermined position by rotating the steel pipe pile. It becomes.

It is sectional drawing before the connection of the steel pipe pile connection member which concerns on 1st embodiment. It is sectional drawing which shows the connection state of the steel pipe pile connection member which concerns on 1st embodiment. It is sectional drawing before the connection of the steel pipe pile connection member which concerns on 2nd embodiment. It is sectional drawing which shows the connection state of the steel pipe pile connection member which concerns on 2nd embodiment. It is the outline schematic of the connection state of the steel pipe pile connection member which concerns on 3rd embodiment. It is the outline schematic of the connection state of the steel pipe pile connection member concerning a fourth embodiment. It is the outline schematic of the connection state of the steel pipe pile connection member concerning a fifth embodiment. It is sectional drawing of the connection state of the steel pipe pile connection member which concerns on 5th embodiment.

  Preferred embodiments of the present invention will be described below with reference to the accompanying drawings. Such an embodiment is merely an example for facilitating understanding of the invention, and does not limit the present invention unless otherwise specified. In the present specification and drawings, elements having substantially the same functions and configurations are denoted by the same reference numerals, and redundant description is omitted, and elements not directly related to the present invention are not shown.

  <First embodiment>

  FIG. 1: has shown sectional drawing of the state before the connection of the steel pipe pile connection member 100 which concerns on 1st embodiment.

  The upper drawing shows a first connecting member 20 (the welded portion is not shown) attached to the steel pipe 10 by welding, and the first connecting member 20 includes a first protruding portion 21 and a second protruding portion 22. ing.

  The first projection 21 is tapered from the outside to the inside, and a groove 23 is provided on the outside of the first projection 21.

  The first connecting member 20 is provided with a connecting hole portion 24 so as to penetrate the first protruding portion 21 and the second protruding portion 22.

  The lower drawing shows a second connecting member 30 (welded portion not shown) attached to the steel pipe 12 by welding. The second connecting member 30 includes a third protruding portion 31, and the third protruding portion 31. A groove portion 23 is provided on the surface of the second connecting member 30 on the opposite side.

  Further, the second connecting member 30 is provided with a connecting hole portion 32 so as to penetrate the third protruding portion 31 and the second connecting member 30.

  FIG. 2 shows a cross-sectional view of the steel pipe pile connecting member 100 in a state where the first connecting member 20 and the second connecting member 30 are connected.

  As shown in FIG. 2, the first connecting member 20 and the second connecting member 30 are fixed by two locking pins 40 and further connected by providing an annular locking member 41 in the groove 23.

  Further, the first connecting member 20 and the second connecting member 30 are connected to each other so that the protrusions are engaged with each other, and three vertical contact surfaces 50 are provided.

  In addition, although the direction of the 2nd projection part 22 is longer toward the longitudinal direction of the steel pipe 10 than the 1st projection part 21, when connecting the 1st connection member 20 and the 2nd connection member 30 by this at a construction site, Positioning can be easily performed as viewed from the outside.

  The steel pipe pile connecting member 100 includes the three vertical contact surfaces 50, so that even when a bending force is applied to the steel pipe 10 and the steel pipe 12, the locking pin 40 can disperse the shear stress in three places. Thus, even with a small number of locking pins 40, it is possible to provide a high bending stress resistance.

Furthermore, by providing the annular locking member 41, it becomes possible to receive the shear stress generated by the bending stress on the steel pipe 10 and the steel pipe 12 by both the locking pin 40 and the annular locking member 41, and the steel pipe pile connection. The member 100 can be provided with a strength against a higher bending stress.
<Second embodiment>

  3 and 4 show cross-sectional views of the steel pipe pile connecting member 200 according to the second embodiment, and correspond to FIGS. 1 and 2 of the first embodiment, respectively.

  The difference from the first embodiment is that the first protrusion 21 is not tapered and is substantially vertical. There is no difference from the first embodiment in other points.

The steel pipe pile connecting member 200 according to the second embodiment can be employed when bending stress is not applied as much as the steel pipe pile connecting member 100 according to the first embodiment, and the first embodiment also in terms of manufacturing cost. This is more advantageous than the steel pipe pile connecting member 100 according to the above.
<Third embodiment>

  FIG. 5 is a schematic external view of a connected state of the steel pipe pile connecting member 100 according to the first embodiment. A first connecting member 20 is welded to the tip of the steel pipe 10, and a second connecting member 30 is welded to the rear end of the other steel pipe 12.

  The first connecting member 20 and the second connecting member 30 are connected by two locking pins 40. An annular locking material insertion hole 42 is provided on the surface of the second connecting member 30, and the first connecting member 20. After the second connecting member 30 is connected, the annular locking member 41 is inserted from the annular locking member insertion hole 42.

By inserting the annular locking member 41 over almost the entire circumference of the steel pipe pile connecting member 100, the first connecting member 20 and the second connecting member 30 are firmly fixed, and coupled with the locking pin 40, the shearing stress is prevented. High strength.
<Fourth embodiment>

  FIG. 6 is a schematic external view of a connected state of the steel pipe pile connecting member 100 according to the fourth embodiment.

  The difference from the third embodiment according to FIG. 5 is the number of locking pins 40. In the fourth embodiment, four locking pins 40 are provided.

Note that the number of the locking pins 40 is determined by the proof strength against the required bending stress, and may be four or more.
<Fifth embodiment>

  FIG. 7 is a schematic external view of a connected state of the steel pipe pile connecting member 100 according to the fifth embodiment, and FIG. 8 is a sectional view thereof.

  In FIG. 7, first, the first connecting member 20 welded to the front end of the steel pipe 10 is inserted into the second connecting member 30 welded to the rear end of the steel pipe 12, and then the front end of the annular locking member 41 ( Normally, a metal round bar) is inserted into the annular locking member insertion hole 42 while being hooked in the annular locking material fixing hole 43 of FIG.

  In this state, when the steel pipe 10 is rotated in the rotation direction illustrated in FIG. 7, the annular locking member 41 is wound into the second connecting member 30, and the groove portion of the first connecting member 20 and the second connecting member 30. 23.

  After the annular locking member 41 is drawn to almost the entire circumference of the steel pipe pile connecting member 100, the connection between the first connecting member 20 and the second connecting member 30 is completed by inserting the locking pin 40 into a predetermined position. To do.

  7 and 8, the annular locking member 41 can be easily installed at a predetermined position by rotating the steel pipe 10, and the steel pipe pile connecting member 100 having high resistance to bending stress. Can be quickly installed at the construction site.

  The preferred embodiments of the present invention have been described above with reference to the accompanying drawings.

  It will be apparent to those skilled in the art that various changes and modifications can be made within the scope of the claims, and these are naturally within the technical scope of the present invention. Understood.

  The present invention relates to a steel pipe pile connection that is used for a steel pipe pile that penetrates into a hard ground existing in the basement and secures a supporting force when a building is constructed in a place where the supporting force of the ground is not sufficient. It can be used as a member.

10: Steel pipe, 12: Steel pipe, 20: First connecting member, 21: First protrusion, 22: Second protrusion, 23: Groove, 24: Connection hole, 30: Second connection member, 31: Third Projection, 32: connecting hole, 40: locking pin, 41: annular locking material, 42: annular locking material insertion hole, 43: annular locking material fixing hole, 50: vertical contact surface, 100: steel pipe Pile connecting member, 200: Steel pipe pile connecting member

Claims (6)

In a steel pipe pile connection member that connects cylindrical steel pipe piles that rotate and penetrate into the ground,
The steel pipe pile connecting member is composed of a first connecting member and a second connecting member,
The first connecting member and the second connecting member each include at least three vertical contact surfaces in a connecting portion in a state where the first connecting member and the second connecting member are connected to each other,
Steel pipe pile coupling member, characterized in Rukoto comprises a locking pin extending through the three vertical contact surface.


  2. The vertical contact surface according to claim 1, wherein the vertical contact surface inside the vertical contact surface outside the steel pipe pile is the same as or longer than a longitudinal direction of the steel pipe pile. The steel pipe pile connection member of description.   The said steel pipe pile connection member is being fixed with the at least 2 latching pin in the state with which the said 1st connection member and the said 2nd connection member were connected, The Claim 1 or Claim 2 characterized by the above-mentioned. Steel pipe pile connection member.   The said vertical direction contact surface is provided with a groove part, The steel pipe pile connection member as described in any one of Claims 1-3 characterized by the above-mentioned.   5. The steel pipe pile connection member according to claim 4, wherein the first connection member and the second connection member include an annular locking material insertion hole on at least one surface.   The steel pipe pile connection member according to claim 5, further comprising an annular locking member fixing hole in a part of the groove portion of either the first connection member or the second connection member.

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