JP2003064667A - Joint structure of pile - Google Patents

Abstract

PROBLEM TO BE SOLVED: To join pipes together so as not to generate play in a joint part, when the pipes are joined together for formation of a pile. SOLUTION: In the pile 5 formed by joining the pipes together, a spigot 2, which is formed in a lower pipe 1 joined to an upper pipe 3, is covered with a socket 4 which is formed in the upper pipe 3; a back end face 7 inside the socket 4 is brought into contact with an end face 6 of the spigot 2, so as to be made capable of bearing a compressive force acting in the axial direction of the pile 5; common holes 16a common to the spigot 2 and the socket 4 are formed in the spigot 2 and the socket 4; common holes 16b are formed in circumferential positions separate from positions which face each other through an axial center of the spigot 2 and the socket 4 from the common holes 16a; and curved bolts 17 are made to pass from the common holes 16a to the common holes 16b, and fastened into nuts 19, so that the spigot 2 and the socket 4 can be fixed to each other.

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pile joint structure. [0002] A pile usually used as a foundation for a building is formed by, for example, joining a plurality of pipes. In order to use this pile as a foundation for a building in a vertically buried state, a rotating torque is applied to a head pipe having a spiral excavated portion at the bottom, and the spiral excavated portion is used for grounding. Dig vertically. When the top pipe enters the ground to a certain depth, a new pipe is added to the end opposite to the excavated part and fixed, and a rotational torque is applied to this added pipe, and the top pipe is further deepened in the ground. Digging into. When the added pipe enters the ground to a certain depth, a new pipe is added to the upper end thereof and fixed, and the same operation is repeated until the pile is formed to a predetermined length. Thus, the pile can be provided in a vertically buried state. [0004] In the above-mentioned method for forming a pile, a joint state of a pipe, that is, a joint structure of a pile capable of transmitting rotational torque will be described with reference to FIG. As shown in FIG. 4, the upper pipe 3 is connected to the lower pipe 1 in a state where the receiving port 4 formed at the lower end of the upper pipe 3 is covered by the insertion port 2 formed at the upper end of the lower pipe 1. And fixed to form the stake 5. [0005] Lower pipe 1 at construction site of pile 5 for building
As a method for joining the upper pipe 3, as shown in FIG. 5, the receptacle 4 is connected to the insertion port 2 until the rear end face 7 formed inside the reception port 4 hits the end face 6 of the insertion port 2. The cover 2 and the receiving port 4 are fixed so as not to be displaced from each other by an appropriate method, and then the receiving port 4 and the receiving port 2 are co-drilled with a drill 8 to form a common hole 9. I do. In the insertion port 2 and the receiving port 4, a co-hole 9 is formed at a position opposite to the co-hole 9 through the axis. Thereafter, at the position appropriately shifted in the axial direction from the position where the co-hole 9 is formed, and at the position shifted in the circumferential direction from the direction in which the processing is performed, for example, at a position shifted by 90 degrees, similarly to the above, And two holes of the receiving port 4 are subjected to co-drilling processing to form other co-holes 9 respectively. When four co-holes 9 are formed, as shown in FIG. 4, bolts 10 are inserted through the co-holes 9 facing each other in the radial direction, and nuts 12 are tightened from both ends thereof with washers 11 interposed therebetween. The insertion port 2 and the reception port 4 are connected to each other. In the same manner as described above, the bolt 10 is inserted into the radially opposed holes 9 at positions shifted axially from this position and at positions shifted 90 degrees in the circumferential direction.
The nut 12 is tightened from both ends with the washers 11 interposed therebetween, and the insertion port 2 and the reception port 4 are connected to each other. in this way,
Since the insertion port 2 and the receiving port 4 are connected so as to be integrated as a pile 5, it is possible to transmit a rotational torque for excavating a leading pipe (not shown). Can stably support the building. [0007] However, in the conventional joining method of the insertion port 2 and the receiving port 4 in the prior art, as shown in FIG. Due to the effect of the gap 13 generated and the gap 14 generated by the dimensional difference between the outer peripheral surface 2a of the insertion port 2 and the inner peripheral surface 4a of the receiving port 4, play may occur in the joint portion 15 of the inserting port 2 and the receiving port 4 in some cases. May occur. The occurrence of such backlash is not preferable in terms of the role of the pile 5 as the foundation of the building. Accordingly, an object of the present invention is to solve such a problem and to form a pile by joining pipes so that rattling does not occur at a joint portion. According to a first aspect of the present invention, there is provided a pile formed by joining a plurality of pipes, the ends of one of the pipes being joined to each other. The receptacle formed at the end of the other pipe is covered with the insertion hole formed at the portion, and the inner end surface inside the reception port contacts the end surface at the insertion port to extend in the axial direction of the pile. An acting compressive force can be supported, and a first through hole common to the insertion port and the reception port is formed in the insertion port and the reception port, and the insertion hole is inserted through the first through hole. A second through-hole is formed at a position in a circumferential direction different from a position facing through the axis of the mouth and the receiving port, and a curved bolt extends from the first through-hole to the second through-hole. Is passed through, a nut is fastened to the curved bolt, the insertion hole and The receiving port is fixed to each other. According to such a configuration, the second through-hole is formed at a position in the circumferential direction different from the position facing the first through-hole through the axis of the receiving port. The curved bolt passed from the through hole to the second through hole is the first bolt.
Since the nut is tightened in a state of contacting the edge on the insertion side and the edge on the receiving side in the through hole and the second through hole,
The insertion port and the reception port can be fixed to each other while restricting the circumferential and radial movement between the insertion reception ports. Therefore, it is possible to prevent rattling at the joint portion of the formed pile. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to FIGS. FIG. 1 is a radial cross-sectional view showing a joint structure of a pile according to the present invention, and FIG. 2 shows a state in which a common hole, which is a through hole common to an insertion port and a receiving port, is formed in FIG. FIG. FIG. 3 is an enlarged view of a main part in FIG. In the joint structure according to the present invention, in order to form the first and second through holes, the rear end face 7 of the receiving port 4 is formed in the same manner as in the process of forming the common hole 9 shown in FIG.
Is carried out by using a drill 8 after covering the receiving port 4 on the insertion port 2 until hits the end face 6 of the insertion port 2. However, at this time, as shown in FIG. 2, a common hole 16 which is a first through hole common to the insertion opening 2 and the reception opening 4 is formed.
a, and a position shifted in the circumferential direction from the common hole 16a;
For example, a common hole 16a is similarly formed at a position shifted by 180 degrees. Thereafter, at the position shifted in the circumferential direction from the direction in which the respective co-holes 16a are formed, for example, at a position shifted by 120 degrees, two places of the insertion opening 2 and the receiving opening 4 are subjected to co-piercing processing in the same manner as described above.
A common hole 16b, which is a second through hole, is formed. Next, as shown in FIG. 1, a curved bolt 17 which can be formed by, for example, bending a commercially available bolt is passed through a common hole 16a.
A hole 1 formed at a position 120 degrees in the circumferential direction from a.
6b. After that, the nut 2 is tightened from both ends of the curved bolt 17 via the spring washers 18 to fix the insertion port 2 and the receiving port 4 to each other. At this time, by tightening the nut 19, as shown in FIG.
The edge 20 on the side of the insertion port 2 and the edge 21 on the side of the reception port 4 in (16b) correspond to each other. Can be fixed to Therefore, generation of backlash in the circumferential direction and the radial direction in the joint portion 15 of the insertion port 2 and the receiving port 4 can be prevented, and the pile 5 having a stable structure can be formed. Further, if a bush or the like is inserted into the formed common holes 16a and 16b, it is possible to more reliably prevent the play at the joint 15 of the insertion opening 2 and the receiving opening 4. As described above, according to the present invention, the second through hole is formed at a position in the circumferential direction different from the position facing the first through hole through the axis of the receiving port. The nut in a state where the curved bolt passed from the first through hole to the second through hole is in contact with the insertion side edge and the reception side edge of the first through hole and the second through hole. Is tightened, so that the insertion port and the reception port can be fixed to each other while restricting the circumferential and radial movement between the insertion reception port. Therefore, it is possible to prevent rattling at the joint portion of the formed pile.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an axial sectional view showing a joint structure of a pile according to the present invention. FIG. 2 is an axial sectional view showing a method of forming a common hole in FIG. 1; FIG. 3 is an enlarged view of a main part in FIG. 1; FIG. 4 is an axial sectional view showing a joint structure of a conventional pile. FIG. 5 is an axial sectional view showing a formation position of a common hole in FIG. 4; FIG. 6 is an enlarged view of a main part in FIG. [Description of Signs] 1 Lower pipe 2 Insertion port 3 Upper pipe 4 Reception port 5 Pile 6 End face 7 Back end face 16a Co-hole 16b Co-hole 17 Curved bolt 19 Nut

   ────────────────────────────────────────────────── ─── Continuation of front page    (72) Inventor Yutaro Takahashi             2-26 Ohama-cho, Amagasaki-shi, Hyogo Pref.             Kubota Mukogawa Works F term (reference) 2D041 AA02 BA44 CA03 CB06 DB11

Claims (1)

Claims 1. In a pile formed by joining a plurality of pipes, a pile formed at an end of one of the pipes joined to each other and an end of the other pipe. The formed receiving port is covered, and a rear end surface inside the receiving port is capable of supporting a compressive force acting in the axial direction of the pile by contacting an end surface of the insertion port, and the insertion port and the receiving port are supported. A first through-hole common to the insertion port and the reception port is formed in the mouth, and is different from a position facing the first insertion hole through the axis of the insertion port and the reception port. At the circumferential position of
Is formed, a curved bolt is passed from the first through hole to the second through hole, a nut is fastened to the curved bolt, and the insertion port and the receiving port are mutually connected. A pile joint structure characterized by being fixed.