JP2013040536A - Steel pipe pile connection structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a non-welded steel pipe pile connection structure capable of effectively resisting against not only rotating force but also bending force.SOLUTION: The steel pipe pile connection structure comprises a pair of steel pipe piles 10 connected to each other via a plurality of circular members 20. Each steel pipe pile 10 comprises: a steel pipe pile body 11; and an end member 12 mounted at the tip of the steel pipe pile body 11. At the end of the end member 12, a plurality of protruded portions are provided at peripheral spaces, and between the protruded portions, a plurality of recessed portions are provided. The plurality of recessed and protruded portions are arranged in areas where the end member 12 is equally divided in the peripheral direction, respectively. The recessed and protruded portions of the end members 12 of the two steel pipe piles 10 are fitted to each other, the circular members 20 are mounted to cover the whole recessed and protruded portions of both end members 12 from the outside, and male screw members 30 are threaded via stopper holes of the circular members 20 into female screw portions of both end members 12 to fasten the circular members 20 to both end members 12. Thus, both end members 12 are closely fixed to each other to connect both steel pipe piles 10 to each other.

Description

  The present invention relates to a steel pipe pile connection structure used for pile foundation work.

  Conventionally, various techniques have been proposed for connecting steel pipe piles embedded in the ground in construction foundation work or the like in the longitudinal direction. As one of them, a method of joining steel pipe piles by on-site welding has been proposed, but the method of welding in this way requires advanced skills and is affected by the weather. Steel pipe pile joint structures are being studied.

  In addition, in view of the fact that a construction method is proposed in which a screw-shaped blade at the tip is screwed into the ground by applying a rotational force to the steel pipe pile, the development of a steel pipe pile joint structure that can resist the rotational force has been developed. It is being advanced.

  Under such a background, in recent years, a plurality of concave and convex portions are formed at each end of two steel pipe piles to be connected, and these convex and concave portions are fitted to each other and are adjacent to each other along the circumferential direction. The connection structure of the steel pipe pile which connects parts with a connection member is proposed (refer to patent documents 1). By adopting such a connection structure, since both steel pipe piles are connected in a state where the concavo-convex parts formed at each end of two steel pipe piles are fitted together, it is said that it can well counter the rotational force. Yes.

JP 2004-52333 A

  However, the connection structure described in Patent Document 1 described above is such that the projections adjacent to each other in the circumferential direction are thin in a state in which the projections and depressions at each end of the two steel pipe piles to be coupled are fitted together. Since it is simply connected by a strip-shaped connecting member, there is a possibility that it cannot sufficiently resist when a large bending force acts on the connected steel pipe piles.

  This invention is made | formed in view of this situation, and it aims at providing the connection structure of the steel pipe pile of a non-welding system which can counter effectively not only rotational force but bending force.

  In order to achieve the above object, the connection structure according to the present invention is a connection structure of a steel pipe pile in which a pair of steel pipe piles are connected via a connection member, and each steel pipe pile includes a cylindrical steel pipe pile main body and And an annular end member attached to the tip of the steel pipe pile main body. At the end of the end member opposite to the steel pipe pile main body, a plurality of convex parts are provided at intervals in the circumferential direction so as to protrude in the axial direction of the steel pipe pile main body. A plurality of recesses are provided between the protrusions and recesses, and a plurality of recesses (for example, two or three) are arranged in each portion obtained by equally dividing the end member in the circumferential direction (for example, three). A female screw portion is provided on the convex portion arranged at the circumferential end of each portion equally divided in the circumferential direction. The connecting member includes a plurality of arc-shaped members configured to cover the entire uneven portion of both end members from the outside in a state where the uneven portions of the end members of the two steel pipe piles to be connected are fitted to each other. The number of the arc-shaped members is equal to the number (for example, three) of the respective parts divided equally in the circumferential direction of the end member. The arcuate member is provided with a stop hole disposed at a position corresponding to the female screw portion of the end member. And in the state which fitted the uneven parts of the end members of the two steel pipe piles connected, an arc member is attached so that the whole uneven part of both end members may be covered from the outside, and it is provided in the arc member The male screw members are screwed into the female screw portions of the both end members through the formed stop holes, and the arcuate members are fastened to the both end members, so that the both end members are firmly fixed and the steel pipe piles are connected to each other. It will be.

  When such a configuration is adopted, an arc-shaped member is attached so as to cover the entire concave and convex portions of both end members from the outside in a state where the concave and convex portions of the end members of two steel pipe piles to be connected are fitted to each other. By screwing the male threaded member into the female threaded part of the both end member through the stop hole provided in the member and fastening the arc-shaped member to the both end member, the both end member is firmly fixed and the steel pipe piles are Can be connected. At this time, since the concavo-convex portions of the both end members are fitted to each other, even when a rotational force acts on the connected steel pipe piles, it is possible to effectively counter the rotational force. In addition, since the arc-shaped member is fastened to the both end members in a state where the entire uneven portion of the both end members is covered with the arc-shaped member from the outside, even when a bending force acts on the connected steel pipe piles, It can effectively counter the bending force.

  In the connection structure according to the present invention, the end member is provided with an annular recess on the outer peripheral surface of the portion closer to the steel pipe pile body than the uneven portion, and the arc-shaped member has the entire uneven portion of the fitted end members. It is preferable to provide a pair of annular convex portions that are fitted into the annular concave portions of the both end members when the cover is covered from the outside.

  When such a configuration is adopted, when the entire concavo-convex portion of the fitted end member is covered from the outside with the arc-shaped member, the pair of annular convex portions of the arc-shaped member can be fitted into the annular concave portion of the both-end member. . Therefore, the arc-shaped member is attached to both end members so that the region between the annular recess of one end member and the annular recess of the other end member is sandwiched from the outside by the pair of annular projecting portions of the arc-shaped member. Since it can attach, both end part members can be stuck-fixed more firmly.

  Further, in the connection structure according to the present invention, the circumferential length of the convex portion provided with the female screw portion of the end member is set longer than the circumferential length of the convex portion not provided with the female screw portion. It is preferable.

  When such a configuration is adopted, the circumferential direction of the convex portion provided with the female thread portion of the end member (the convex portion disposed at the circumferential end portion of each portion obtained by equally dividing the end member in the circumferential direction) The length is set to be longer than the circumferential length of the convex portion not provided with the female screw portion (the convex portion disposed at the central portion in the circumferential direction of each portion obtained by equally dividing the end member in the circumferential direction). Therefore, the strength of the convex portion provided with the female screw portion can be ensured.

  Moreover, in the connection structure which concerns on this invention, it arrange | positions so that it may closely_contact | adhere to the internal peripheral surface of the convex part of a both-ends member in the state which fitted the uneven | corrugated | grooved parts of the end members of two steel pipe piles connected. An inner annular member can also be provided.

  When such a configuration is adopted, the inner annular member is arranged so as to be in close contact with the inner peripheral surface of the convex portion of the both end members in a state where the uneven portions of the end members of the two steel pipe piles to be connected are fitted to each other. Therefore, even when a bending force acts on the connected steel pipe piles, the bending force can be more effectively countered.

  In the connection structure according to the present invention, it is preferable that an annular groove for fitting the inner annular member is provided on the inner peripheral surface of the convex portion of the end member.

  When such a configuration is employed, the inner annular member can be fitted into the annular groove provided on the inner peripheral surface of the convex portion of the end member, so that the position shift of the inner annular member can be prevented.

  ADVANTAGE OF THE INVENTION According to this invention, it becomes possible to provide the connection structure of the steel pipe pile of a non-welding system which can effectively counter not only rotational force but bending force.

It is a perspective view of the connection structure of the steel pipe pile which concerns on 1st embodiment of this invention. It is a longitudinal cross-sectional view of the connection structure shown in FIG. FIG. 3 is an exploded cross-sectional view of a portion III in FIG. 2, (A) is a cross-sectional view showing two steel pipe piles in a fitted state, (B) is a cross-sectional view showing a connecting member, and (C) is a male screw. FIG. It is sectional drawing of the IV-IV part of FIG. FIG. 2 shows a connecting member used in the connecting structure shown in FIG. 1, (A) is a front view, (B) is a cross-sectional view of the VB-VB portion of (A), and (C) is a bottom view. It is a longitudinal cross-sectional view of the connection structure of the steel pipe pile which concerns on 2nd embodiment of this invention. It is sectional drawing of the VII-VII part of FIG. It is a longitudinal cross-sectional view of the connection structure of the steel pipe pile which concerns on 3rd embodiment of this invention. It is sectional drawing of the IX-IX part of FIG. FIG. 9 shows a connecting member used in the connecting structure shown in FIG. 8, (A) is a front view, (B) is a sectional view of the XB-XB portion of (A), and (C) is a bottom view. It is a longitudinal cross-sectional view of the connection structure of the steel pipe pile which concerns on 4th embodiment of this invention. It is sectional drawing of the XII-XII part of FIG. 11A and 11B show connection members used in the connection structure shown in FIG. 11, where FIG. 11A is a front view, FIG. 11B is a cross-sectional view of the XIIIB-XIIIB portion of FIG. 11A, and FIG.

  Hereinafter, with reference to drawings, the connection structure of the steel pipe pile which concerns on embodiment of this invention is demonstrated.

<First embodiment>
First, the connection structure according to the first embodiment of the present invention will be described with reference to FIGS. As shown in FIG. 1, the connection structure according to the present embodiment is a structure in which a pair of steel pipe piles 10 are connected via a plurality of arc-shaped members 20 (connection members) and bolts 30 (male screw members). . The two steel pipe piles 10 to be connected have the same structure and shape.

  First, the structure of the steel pipe pile 10 connected is demonstrated.

  The steel pipe pile 10 includes an easy steel pipe pile main body 11 shown in FIGS. 1 and 2 and an end member 12 attached to the tip of the steel pipe pile main body 11. The steel pipe pile main body 11 is a metal hollow cylinder having a predetermined length and diameter. As shown in FIG. 2, one end of the end member 12 is fixed to the tip of the steel pipe pile body 11 by factory welding.

  The end member 12 is an annular member made of metal, and protrudes in the axial direction of the steel pipe pile main body 11 as shown in FIG. 1 at the other end (the end opposite to the steel pipe pile main body 11). Thus, a plurality of convex portions 12a are provided at intervals in the circumferential direction, and a plurality of concave portions 12b are provided between the plurality of convex portions 12a. And the convex part 12a of the edge member 12 of one steel pipe pile 10 can be engage | inserted in the recessed part 12b of the edge member 12b of the other steel pipe pile 10. FIG. In addition, in the following description, when distinguishing the uneven part of the steel pipe pile 10 arrange | positioned above the paper surface of FIG. 1 and the uneven part of the steel pipe pile 10 arrange | positioned below, the convex part of the upper steel pipe pile 10 is shown. And the concave portions are referred to as “12aU” and “12bU”, respectively, and the convex portion and the concave portion of the lower steel pipe pile 10 are referred to as “12aD” and “12bD”, respectively.

  As shown in FIG. 4, the convex portion 12 a and the concave portion 12 b in the present embodiment are arranged two by two in each portion (12 A, 12 B, 12 C) obtained by equally dividing the end member 12 into three in the circumferential direction. Therefore, the end member 12 of each steel pipe pile 10 will have six convex parts 12a and six concave parts 12b. For example, in the portion 12A of the end member 12 of the upper steel pipe pile 10, two convex portions 12aU and two concave portions 12bU are arranged. Moreover, the two convex parts 12aD and the two concave parts 12bD are also arranged in the portion 12A of the end member 12 of the steel pipe pile 10 below. Then, the two convex portions 12aD of the lower steel pipe pile 10 are fitted into the two concave portions 12bU of the upper steel pipe pile 10, respectively.

  Moreover, as shown in FIG. 1, FIG. 2, FIG. 3 (A), FIG. 4, the convex part arrange | positioned at the circumferential direction edge part of each part (12A, 12B, 12C) equally divided into 3 in the circumferential direction. 12aU (12aD) is provided with a female screw portion 12c. And as shown in FIG. 4, the circumferential direction length of the convex part 12aU (12aD) in which the internal thread part 12c is provided is set longer than the circumferential direction length of the convex part in which the internal thread part 12c is not provided. Has been. Thereby, the intensity | strength of convex part 12aU (12aD) provided with the internal thread part 12c is securable.

  Further, as shown in FIGS. 1, 2, and 3A, the end member 12 is provided with an annular recess 12d on the outer peripheral surface of the portion closer to the steel pipe pile body 11 than the protrusion 12a and the recess 12b. ing. An annular convex portion 22 of the arcuate member 20 described later is fitted into the annular concave portion 12d. Further, as shown in FIG. 3A, an annular groove 12e for fitting an inner annular member 40 to be described later is provided on the inner peripheral surface of the convex portion 12a of the end member 12. The inner annular member 40 can be prevented from being displaced by fitting the inner annular member 40 into the annular groove 12e.

  Next, the structure of the circular arc member 20 (connecting member) which connects a pair of steel pipe piles 10 is demonstrated.

  As shown in FIGS. 1 and 5C, the arc-shaped member 20 is a metal member formed in an arc shape in plan view. As shown in FIGS. 1 and 2, the arcuate member 20 has the entire concavo-convex portion of both end members 12 outside in a state in which the concavo-convex portions of the end member 12 of the two steel pipe piles 10 to be connected are fitted to each other. It is comprised so that it may cover from. The number of the arc-shaped members 20 is made to coincide with the number of the respective parts (12A, 12B, 12C) divided equally in the circumferential direction of the end member 12. In the present embodiment, three arcuate members 20 are employed.

  The arcuate member 20 is provided with a stop hole 21 disposed at a position corresponding to the female screw portion 12 c of the end member 12. In the present embodiment, since two female screw portions 12c are provided in each portion (12A, 12B, 12C) obtained by equally dividing the end member 12 into three in the circumferential direction, each arc-shaped member 20 has 2 Individual stop holes 21 are provided. Further, as shown in FIG. 5, a countersink portion 21 a having a predetermined depth is formed on the outer surface of the arcuate member 20 around the stop hole 21. When the bolt 30 is inserted into the retaining hole 21 and screwed into the female screw portion 12c of the end member 12, the washer 31 and the head of the bolt 30 shown in FIG. Store and maintain a stable fastening condition.

  As shown in FIGS. 1, 2, 3 (B) and 5, the arc-shaped member 20 has both end members 12 when covering the entire concavo-convex portion of the fitted end members 12 from the outside. A pair of annular convex portions 22 fitted into the annular concave portion 12d is provided. By fitting the pair of annular projections 22 of the arcuate member 20 into the annular recesses 12d of the both end members 12, the annular recesses 12d of one end member 12 and the annular recesses 12d of the other end member 12 are connected. The region between the two can be sandwiched from the outside by the pair of annular convex portions 22 of the arcuate member 20. Thereby, both end member 12 can be more firmly stuck and fixed.

  Next, the inner annular member 40 that improves the resistance to bending force will be described.

  In this embodiment, as shown in FIG. 2, FIG. 3 (A), and FIG. 4, both end member 12 in the state which the uneven | corrugated | grooved part of the end member 12 of the two steel pipe piles 10 connected is fitted. An inner annular member 40 disposed so as to be in close contact with the inner peripheral surface of the convex portion 12a is employed. The inner annular member 40 is a metal annular member having a predetermined thickness and width. Since the inner annular member 40 is arranged so as to be in close contact with the inner peripheral surface of the convex portion 12a of the both end member 12 in a state where the uneven portions of the end member 12 of the two steel pipe piles 10 to be connected are fitted to each other. Even when a bending force acts on the connected steel pipe piles 10, it is possible to effectively counter this bending force. As shown in FIG. 3A, the inner annular member 40 is disposed in a state of being fitted into an annular groove 12 e formed on the inner peripheral surface of the convex portion 12 a of the end member 12.

  The bolt 30 is inserted into the retaining hole 21 of the arcuate member 20 as shown in FIGS. 1 to 4 and is screwed into the female screw portion 12 c of the end member 12. When the bolt 30 is screwed into the female screw 12 c of the end member 12, the arcuate member 20 is fastened to the end member 12. A washer 31 is disposed between the bolt 30 and the arcuate member 20.

  Subsequently, a procedure for obtaining the connection structure according to the present embodiment will be described.

  First, as shown in FIG.1 and FIG.2, the convex part 12a of the edge member 12 of the other steel pipe pile 10 is engage | inserted in the recessed part 12b of the edge part member 12 of one steel pipe pile 10 (two steel pipes connected). The concavo-convex portions of the pile 10 are fitted to each other), and both end members 12 are brought into close contact with each other. At this time, as shown in FIGS. 2 and 3, the inner annular member 40 is fitted into the annular groove 12 e formed on the inner peripheral surface of the convex portion 12 a of the both end member 12.

  Next, as shown in FIG. 1 and FIG. 2, three arcuate members 20 are attached so as to cover the entire concavo-convex portion of both end member 12 from the outside, and washers are attached to stop holes 21 provided in each arcuate member 20. 31 is attached and the bolt 30 is inserted, and the bolt 30 is screwed into the female screw portion 12 c of the both end members 12. Thereby, each circular-arc-shaped member 20 is fastened by the both end part member 12, the both end part member 12 is closely_contact | adhered and fixed, and a pair of steel pipe piles 10 will be connected.

  In the connection structure which concerns on embodiment described above, it covers so that the uneven | corrugated | grooved part of the both ends member 12 may be covered from the outer side in the state which fitted the uneven | corrugated | grooved parts of the edge member 12 of the two steel pipe piles 10 connected. The arc-shaped member 20 is attached to the bolt, and the bolt 30 is screwed into the female threaded portion 12c of the both end member 12 through the retaining hole 21 provided in the arc-shaped member 20, and the arc-shaped member 20 is fastened to the both end member 12 By doing this, the steel pipe piles 10 can be connected to each other by fixing the both end members 12 tightly. At this time, since the concavo-convex portions of the both end members 12 are fitted to each other, even when a rotational force acts on the connected steel pipe piles 10, it is possible to effectively counter the rotational force. Moreover, since the arc-shaped member 20 is fastened to the both-ends member 12 in the state which covered the uneven | corrugated | grooved part of the both-ends member 12 from the outer side with the arc-shaped member 20, the bending force acted on the connected steel pipe pile 10 Even in this case, it is possible to effectively counter this bending force.

  Moreover, in the connection structure which concerns on embodiment described above, when covering the whole uneven | corrugated | grooved part of the both-ends member 12 fitted from the outer side with the arc-shaped member 20, an arc-shaped member is carried out to the annular recessed part 12d of the both-ends member 12. Twenty pairs of annular convex portions 22 can be fitted. Accordingly, both end portions are configured such that the region between the annular recess 12d of one end member 12 and the annular recess 12d of the other end member 12 is sandwiched from the outside by the pair of annular projections 22 of the arcuate member 20. Since the arc-shaped member 20 can be attached to the member 12, both end member 12 can be more firmly adhered and fixed.

  Moreover, in the connection structure which concerns on embodiment described above, the convex part (The edge part of the circumferential direction of each part which divided | segmented the edge part member 12 equally in the circumferential direction in which the internal thread part 12d of the edge part member 12 is provided. 12aU (12aD) is set to have a circumferential length longer than the circumferential length of the convex portion where the female screw portion 12d is not provided, so that the female screw portion 12d is provided. The strength of the protruding portion 12aU (12aD) can be ensured.

  Moreover, in the connection structure which concerns on embodiment described above, in the state which fitted the uneven | corrugated | grooved parts of the edge member 12 of the two steel pipe piles 10 connected, the inner periphery of the convex part 12a of the both-ends member 12 Since the inner annular member 40 is disposed so as to be in close contact with the surface, even when a bending force acts on the connected steel pipe piles 10, it is possible to more effectively counter the bending force. Further, since the inner annular member 40 can be fitted into the annular groove 12e provided on the inner peripheral surface of the convex portion 12a of the end member 12, the position shift of the inner annular member 40 can be prevented.

<Second embodiment>
Then, the connection structure which concerns on 2nd embodiment of this invention is demonstrated using FIG.6 and FIG.7. The connection structure which concerns on 2nd embodiment changes the position and number of the uneven | corrugated | grooved part of the edge part member of the steel pipe pile in 1st embodiment, and changed the position of the stop hole of an arc-shaped member in connection with this. Other configurations are substantially the same as those in the first embodiment. For this reason, in the second embodiment, the description will focus on the configuration different from the first embodiment, and detailed description of the overlapping configuration will be omitted.

  The convex part 12a and the recessed part 12b in this embodiment are arrange | positioned 3 each in each part (12A, 12B, 12C) which divided the end member 12 equally into the circumferential direction as shown in FIG. Therefore, the end member 12 of each steel pipe pile 10 has nine convex parts 12a and nine concave parts 12b. For example, in the portion 12A of the end member 12 of the upper steel pipe pile 10, three convex portions 12aU and three concave portions 12bU are arranged. Moreover, the three convex parts 12aD and the three concave parts 12bD are also arranged in the portion 12A of the end member 12 of the lower steel pipe pile 10. Then, the three convex portions 12aD of the lower steel pipe pile 10 are fitted in the three concave portions 12bU of the upper steel pipe pile 10, respectively.

  Also in the present embodiment, as shown in FIGS. 6 and 7, the convex portions 12 a U (12 a D) disposed at the circumferential ends of the respective portions (12 A, 12 B, 12 C) equally divided into three in the circumferential direction. Is provided with a female screw portion 12c. And as shown in FIG. 7, the circumferential direction length of the convex part 12aU (12aD) in which the internal thread part 12c is provided is set longer than the circumferential direction length of the convex part in which the internal thread part 12c is not provided. Has been. Thereby, the intensity | strength of convex part 12aU (12aD) provided with the internal thread part 12c is securable.

  The arcuate member 20 in the present embodiment has a configuration that is substantially the same as that of the first embodiment. However, in response to the position of the female screw portion 12c of the end member 12 being slightly changed, in each arcuate member 20, each of the two retaining holes 21 is a circumferential end portion than in the first embodiment. It is arranged near the position.

  Also in the connection structure which concerns on embodiment described above, there can exist an effect similar to the connection structure which concerns on 1st embodiment.

<Third embodiment>
Then, the connection structure which concerns on 3rd embodiment of this invention is demonstrated using FIGS. 8-10. The connection structure according to the third embodiment changes the position and number of the concavo-convex portions of the end member of the steel pipe pile in the first embodiment, and also changes the number of the female screw portions, and at the same time, stops the arc-shaped member. The positions and the number of holes are changed, and other configurations are substantially the same as those in the first embodiment. For this reason, in the present embodiment, the description will be focused on the configuration different from the first embodiment, and detailed description of the overlapping configuration will be omitted.

  As shown in FIG. 9, the protrusions 12 a and the recesses 12 b in the present embodiment are arranged in three portions (12A, 12B, 12C) that are obtained by equally dividing the end member 12 into three in the circumferential direction. Therefore, the end member 12 of each steel pipe pile 10 has nine convex parts 12a and nine concave parts 12b. For example, in the portion 12A of the end member 12 of the upper steel pipe pile 10, three convex portions 12aU and three concave portions 12bU are arranged. Moreover, the three convex parts 12aD and the three concave parts 12bD are also arranged in the portion 12A of the end member 12 of the lower steel pipe pile 10. Then, the three convex portions 12aD of the lower steel pipe pile 10 are fitted in the three concave portions 12bU of the upper steel pipe pile 10, respectively.

  Moreover, in this embodiment, as shown in FIG.8 and FIG.9, the convex part 12aU (12aD) arrange | positioned at the circumferential direction edge part of each part (12A, 12B, 12C) equally divided into 3 by the circumferential direction. ) Is provided with a female threaded portion 12c, and a convex portion 12aU (12aD) adjacent to the convex portion at the circumferential end is also provided with a female threaded portion 12c. And as shown in FIG. 9, the circumferential direction length of each convex part 12aU (12aD) in which the internal thread part 12c is provided is longer than the circumferential direction length of the convex part in which the internal thread part 12c is not provided. Is set. Thereby, the intensity | strength of convex part 12aU (12aD) provided with the internal thread part 12c is securable.

  The arcuate member 20 in the present embodiment has a configuration that is substantially the same as that of the first embodiment. However, in response to the change in the number of female screw portions 12 c of the end member 12, four retaining holes 21 are provided in each arcuate member 20 as shown in FIG. 10. Moreover, the circumferential direction edge part of each circular-arc-shaped member 20 is notched diagonally.

  Also in the connection structure which concerns on embodiment described above, there can exist an effect similar to the connection structure which concerns on 1st embodiment.

<Fourth embodiment>
Then, the connection structure which concerns on 4th embodiment of this invention is demonstrated using FIGS. 11-13. The connection structure according to the fourth embodiment changes the position of the concavo-convex portion of the end member of the steel pipe pile in the first embodiment and also changes the number of female screw portions, and in conjunction with this, the stop hole of the arc-shaped member The position and number are changed, and the inner annular member is omitted, and other configurations are substantially the same as those in the first embodiment. For this reason, in the present embodiment, the description will be focused on the configuration different from the first embodiment, and detailed description of the overlapping configuration will be omitted.

  As shown in FIG. 12, the convex portion 12a and the concave portion 12b in this embodiment are divided into two portions (12A, 12B, 12C) obtained by equally dividing the end member 12 into three in the circumferential direction, as in the first embodiment. It is arranged one by one. However, in this embodiment, as shown in FIG.11 and FIG.12, all the convex parts 12aU (12aD) are provided with the internal thread part 12c, and the circumferential direction length of all the convex parts 12aU (12aD) Are the same.

  The arcuate member 20 in the present embodiment has a configuration that is substantially the same as that of the first embodiment. However, in response to the change in the number of the female screw portions 12c of the end member 12, four retaining holes 21 are provided in each arcuate member 20 as shown in FIG. Moreover, the circumferential direction edge part of each circular-arc-shaped member 20 is notched diagonally.

  Further, in this embodiment, the inner annular member 40 employed in the first embodiment is omitted, and accordingly, the trouble of providing an annular groove on the inner peripheral surface of the convex portion 12a of the end member 12 is omitted. I am going to do that.

  Also in the connection structure which concerns on embodiment described above, there can exist an effect similar to the connection structure which concerns on 1st embodiment.

  In each of the embodiments described above, the end member 12 of each steel pipe pile 10 is equally divided into three in the circumferential direction, and three arcuate members 20 are employed correspondingly. Further, the division in the circumferential direction and the number of the arc-shaped members 20 are not limited to this. For example, the end member of each steel pipe pile can be equally divided into two (or four) in the circumferential direction, and two (or four) arcuate members can be employed corresponding to this. Also in this case, a plurality of convex portions and concave portions (for example, two or three) can be arranged in each portion obtained by equally dividing the end member 12 into two (or four) in the circumferential direction.

  Moreover, in each embodiment demonstrated above, in each part (12A, 12B, 12C) which divided the edge part member 12 of each steel pipe pile 10 equally into the circumferential direction, two convex parts 12a and the recessed parts 12b or Although an example in which three are arranged has been shown, the number of convex portions and concave portions can be further increased (for example, four each).

  It should be noted that the present invention is not limited to the above-described embodiment, and those in which those skilled in the art appropriately modify the design are included in the scope of the present invention as long as they have the features of the present invention. Is done. In other words, each element included in the embodiment and its arrangement, material, condition, shape, size, and the like are not limited to those illustrated, and can be appropriately changed. Moreover, each element with which the said embodiment is provided can be combined as much as technically possible, and the combination of these is also included in the scope of the present invention as long as it includes the features of the present invention.

DESCRIPTION OF SYMBOLS 10 ... Steel pipe pile 11 ... Steel pipe pile main body 12 ... End part member 12a * 12aD * 12aU ... Convex part 12b * 12bD * 12bU ... Concave part 12c ... Female thread part 12d ... Annular recessed part 12e ... Annular groove 20 ... Arc-shaped member (connection member) )
21 ... Stop hole 22 ... Annular convex part 30 ... Bolt (male screw member)
40 ... Inner ring member

Claims (8)

A steel pipe pile connection structure in which a pair of steel pipe piles are connected via a connecting member,
Each of the steel pipe piles includes a tubular steel pipe pile main body, and an annular end member attached to the tip of the steel pipe pile main body,
At the end of the end member opposite to the steel pipe pile main body, a plurality of convex portions are provided at intervals in the circumferential direction so as to protrude in the axial direction of the steel pipe pile main body. A plurality of concave portions are provided between the convex portions, and the concave and convex portions are arranged in a plurality of portions in which the end member is equally divided in the circumferential direction, and are equally divided in the circumferential direction. An internal thread portion is provided on the convex portion arranged at the circumferential end of each portion,
The connecting member is configured to cover the entire uneven portion of the both end members from the outside in a state where the uneven portions of the end members of the two steel pipe piles to be connected are fitted to each other. An arcuate member, and the number of the arcuate members is equal to the number of each portion of the end member that is equally divided in the circumferential direction. A stop hole is provided at a position corresponding to the female screw portion of
In the state where the uneven portions of the end members of the two steel pipe piles to be connected are fitted to each other, the arc-shaped member is attached so as to cover the entire uneven portion of the both end members from the outside, A male screw member is screwed into the female screw portion of the both end member through the stop hole provided in the arc member, and the arc member is fastened to the both end member, thereby the both end portions. The members are closely fixed and the steel pipe piles are connected to each other.
Steel pipe pile connection structure. The end member is provided with an annular recess on the outer peripheral surface of the portion closer to the steel pipe pile body than the uneven portion,
The arcuate member is provided with a pair of annular convex portions that are fitted into the annular concave portions of the both end portion members when covering the entire concave and convex portions of the fitted end portion members from the outside.
The connection structure of the steel pipe pile of Claim 1. The circumferential length of the convex portion provided with the female screw portion of the end member is set to be longer than the circumferential length of the convex portion not provided with the female screw portion.
The steel pipe pile connection structure according to claim 1 or 2. A plurality of the concavo-convex portions are arranged in each portion obtained by equally dividing the end member into three in the circumferential direction,
Three arc-shaped members are provided,
The connection structure of the steel pipe pile as described in any one of Claim 1 to 3. The concavo-convex portions are arranged two by two in each portion obtained by equally dividing the end member into three in the circumferential direction.
The connection structure of the steel pipe pile of Claim 4. Three uneven portions are arranged in each portion obtained by equally dividing the end member into three in the circumferential direction.
The connection structure of the steel pipe pile of Claim 4. An inner annular member arranged to be in close contact with the inner peripheral surface of the convex portion of the both end portion members in a state in which the concave and convex portions of the end member of the two steel pipe piles to be connected are fitted to each other. ,
The connection structure of the steel pipe pile as described in any one of Claim 1 to 6. An annular groove for fitting the inner annular member is provided on the inner peripheral surface of the convex portion of the end member.
The connection structure of the steel pipe pile of Claim 7.

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