JP2002339347A - Joint structure of pile - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable a pile to be formed by making pipes, which form the pile, joined together without undergoing drill-through working at a site of execution of work for the pile. SOLUTION: In the pile 5 formed by joining a plurality of cast pipes, a socket 4, which is formed at a lower end of an upper pipe 3, is made to cover a spigot 2 formed at an upper end of a mutually joined lower pipe 1. A back end face 7 of the inside of 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 an axial direction of the pile 5. A groove 15 is formed in an inner peripheral face 4a of the socket 4 along an axial direction of the socket 4, and a circular hole 16 is formed in a position, corresponding to the groove 15, in the spigot 2. Round steel 17 is made to pass through the circular hole 16, a protrusion 17a of the round steel 17 is inserted into the groove 15 of the socket 4, and a wedge-shaped filling member 19 is fitted into a gap 20 between a side face 18 of the groove 15 and the round steel 17 in such a manner as to be infilled between a bottom face of the groove 15 and an outer peripheral face 2a of the spigot 2.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pile joint structure.

[0002]

2. Description of the Related Art Usually, a pile used as a foundation for a building is formed by joining a plurality of cast pipes made of, for example, ductile cast iron. To use this pile vertically buried for use as a foundation for buildings,
A rotating torque is applied to a leading pipe having a spiral excavated portion at a lower portion, and the spiral excavated portion digs down the ground vertically. When the head pipe enters the ground to a certain depth,
A new pipe is added to the end opposite to the excavated part and fixed,
A rotating torque is applied to the added pipe, and the leading pipe is dug deep into the ground.

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. Thereby, 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. 7, 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, the upper pipe 3 and the lower pipe 1 are covered. Are added to form the pile 5.

[0005] Lower pipe 1 at construction site of pile 5 for building
As shown in FIG. 8, the joining method of the upper pipe 3 is such that the inner end face 7 of the receptacle 4 hits the end face 6 of the insertion port 2.
The receiving port 4 is put on the insertion port 2, and the insertion port 2 and the receiving port 4 are fixed by an appropriate method so as not to be displaced from each other. To form a common hole 9. In the insertion opening 2 and the receiving opening 4, a co-hole 9 is formed at a position on the opposite side from the co-hole 9 through the axis. Thereafter, at a position appropriately shifted in the axial direction from the position where the co-hole 9 is formed, and at a 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,
Two holes, the insertion opening 2 and the receiving opening 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. 7, a bolt 10 is inserted between the co-holes 9 facing in the radial direction, and a nut 12 is tightened from both ends thereof with a washer 11 interposed therebetween. The insertion opening 2 and the receiving opening 4 are fixed so as not to be shifted from each other. Similarly to the above, the bolts 1 at the positions axially displaced from this position and at a position shifted 90 degrees in the circumferential direction are connected to the holes 9 facing each other in the radial direction.
0 is inserted, and the nut 12 is tightened from both ends thereof with the washers 11 interposed therebetween to further fix the insertion opening 2 and the receiving opening 4 so as not to be displaced from each other. Thus, the insertion port 2 and the reception port 4
Are fixed so as to be integrated as a pile 5, the structure of the formed pile 5 is stable, and a rotational torque for excavating a head pipe (not shown) can be transmitted.
After the pile 5 has been driven, the building can be stably supported.

[0007]

As described above, in the prior art, when the lower pipe 1 and the upper pipe 3 forming the pile 5 are joined, the receiving port 4 and the insertion port 2 are required each time the pile 5 is constructed.
Had been drilled together.

However, when the opening 2 and the receiving port 4 are subjected to co-drilling at the construction site, the rear end face 7 of the receiving port 4 and the end face 6 of the inserting port 2 are fixed to each other, and the drill 8 is fixed.
Since the holes 9 are formed by using the method, there is a possibility that the working time is delayed.

In order to eliminate such a delay of the working time, if a common hole 9 is previously provided in the insertion opening 2 and the receiving opening 4 in a pipe manufacturing plant or the like, the pile 5 at the construction site is This is good because it saves you work, but
In order to allow a dimensional tolerance generated when the co-hole 9 is machined, a slightly larger co-hole 9 must be formed. However, if such a slightly larger hole 9 is used, play may occur in the circumferential direction and the axial direction.
It is not preferable to form the through hole 9 in advance because it is not preferable to form the through hole 9.

Accordingly, the present invention has been made to solve the above-mentioned problems and to make it possible to form a pile by joining pipes forming a pile together without performing drilling at a pile construction site. Aim.

[0011]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, according to the present invention, in a pile formed by joining a plurality of cast pipes, an end of one of the pipes joined to each other is provided. A socket formed at the end of the other pipe is covered by the formed insertion port, and a rear end face inside the reception port contacts an end face of the insertion port and acts in the axial direction of the pile. Compressive force can be supported, a groove is formed on the inner peripheral surface of the receiving port along the axial direction of the receiving port, and a through hole is formed at the position of the insertion port corresponding to the groove. A rod is inserted into the groove while being passed through the through-hole,
A wedge-shaped filling member is fitted into the gap between the side surface of the groove and the rod so as to fill the space between the bottom surface of the groove and the outer peripheral surface of the insertion opening.

According to such a configuration, when the socket is put on the insertion port and the insertion port and the reception port are joined at the construction site of the pile, the hole is passed through the through hole formed in the insertion port. Insert the rod in the state into the groove formed in the socket, and fit a wedge-shaped filling member into the gap between the side surface of the groove and the rod so as to fill the gap between the groove bottom surface and the outer peripheral surface of the insertion hole. Thus, the insertion opening and the reception opening can be firmly and integrally fixed. Therefore, it is not necessary to form a co-hole in the insertion opening and the reception opening, and the insertion opening and the reception opening can be easily joined at the pile construction site, and the construction work can be performed efficiently. Furthermore, by inserting the wedge-shaped filling member into the gap, radial play that may occur between the outer peripheral surface of the insertion opening and the inner peripheral surface of the receiving opening due to dimensional tolerances and the like is suppressed, and And the socket can be firmly integrated and fixed in the radial and axial directions, so that a pile having a stable structure can be formed. Further, the rotational torque acting on the upper pipe can be transmitted from the rod to the lower pipe from the side surface of the groove via the filling member.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A joint structure for a pile according to the present invention will be described with reference to FIGS. As shown in FIGS. 1 and 2, the receiving port 4 formed at the lower end of the upper pipe 3 is
The upper pipe 3 is added to the lower pipe 1 in a state of being covered with the insertion opening 2 formed at the upper end of the stake 5 to form the pile 5. Outlet 4
3 and 4 show the shape of the insertion port 2 on which the cover is placed.

As shown in FIGS. 3 and 4, when the receiving port 4 is added to the receiving port 2, a hole is formed at an appropriate position of the receiving port 2 on which the receiving port 4 is put in a pipe manufacturing factory. Given
A round hole 16 is formed, and a round hole 16 is also formed in the insertion opening 2 at a position opposite to the round hole 16 through the axis. In addition, two positions similar to the above are provided at a position appropriately shifted in the axial direction from the position where the round hole 16 is formed and at a position shifted in the circumferential direction from the direction in which the processing is performed, for example, at a position shifted by 90 degrees. Has a round hole 16 formed therein. The round hole 1 extends over the round holes 16 facing each other.
A round steel 17 having the same diameter as 6 is inserted. Reference numeral 17a denotes a protruding portion of the round steel 17 inserted and protruding from the outer peripheral surface 2a of the insertion opening 2.

FIGS. 5 and 6 show the structure of the receiving port 4 which covers the insertion port 2. FIG. As shown in FIG. 5 and FIG.
Is formed thicker than the tube body 3a at the bottom, and a back end face 7 is formed at the inner back of the receiving port 4. Further, inside the receptacle 4, it is inclined radially outward from a position deeper than each position corresponding to the position of the round hole 16 of the insertion opening 2 on which the receptacle 4 is covered to the end face 13 of the receptacle 4. A groove 15 having a tapered surface 14 at the bottom is formed. The width of the groove 15 in the circumferential direction of the receiving port 4 is formed larger than the diameter of the round bar 17.

In the above-mentioned configuration, as shown in FIG. 1, each round steel 17 has a round hole 16 facing each other.
The protrusions 17 a of the round bar 17 are inserted into the grooves 15 formed at
End face 7 at socket 4
Until it hits the end face 6 of the slot 2.
And join it. End face 7 at socket 4
Is in contact with the end face 6 of the slot 2, and a taper surface 14 in the groove 15 is formed in a gap 20 between the side face 18 of the groove 15 and the round steel 17.
A wedge-shaped filling member 19 is fitted so that the gap between the tapered surface 14 and the groove 15 corresponds to the tapered surface 14 of the groove 15 so that the space between the tapered surface 14a and the outer peripheral surface 2a of the insertion opening 2 is filled. Thus, the insertion opening 2 and the receiving opening 4 are joined.

As described above, when the insertion port 2 and the receiving port 4 are joined at the construction site of the pile 5, the round steel 17 is passed through the round hole 16 formed in the insertion port 2. Projection 1
7a is inserted into a groove 15 formed in the receiving hole 4, and a gap 20 between the side surface 18 of the groove 15 and the round steel 17 is formed between the tapered surface 14 of the groove 15 and the outer peripheral surface 2a of the insertion opening 2. Since the wedge-shaped filling member 19 is fitted so as to close the space, it is not necessary to form the co-hole 9 in the insertion opening 2 and the receiving opening 4. Therefore, when joining the insertion port 2 and the receiving port 4, unlike the conventional joint structure of a pile, it is not necessary to form the co-hole 9 in the insertion port 2 and the receiving port 4 at the construction site. 2 and the receptacle 4 can be easily joined, and the construction work can be performed efficiently.

Further, by inserting the wedge-shaped filling member 19 into the gap 20, radial play that may occur due to dimensional tolerances or the like is suppressed, and the insertion opening 2 and the reception opening 4 are firmly integrated. Can be fixed,
The pile 5 having a stable structure can be formed.

Since the groove 15 is on the side of the receiving port 4 and is continuous with the end face 13 of the receiving port 4 with a constant width, a core is formed by centrifugal casting of the pipe forming the pile 5. It can be formed without casting. Therefore, the time for forming the groove 15 by processing can be saved, and the working efficiency can be further improved.

[0020]

As described above, according to the present invention, when a socket is put on an insertion port and the insertion port and the reception port are joined at the construction site of the pile, the through hole formed in the insertion port is passed through. The wedge-shaped packing is inserted into the gap formed between the side of the groove and the rod, so that the gap between the bottom of the groove and the outer peripheral surface of the insertion opening is inserted into the gap between the side of the groove and the rod. By inserting the member, the insertion opening and the reception opening can be firmly and integrally fixed. Therefore, it is not necessary to form a co-hole in the insertion opening and the reception opening, and the insertion opening and the reception opening can be easily joined at the pile construction site, and the construction work can be performed efficiently. Furthermore, by fitting the wedge-shaped filling member into the gap, radial and axial play that may occur between the outer peripheral surface of the insertion opening and the inner peripheral surface of the receiving opening due to dimensional tolerances and the like are suppressed, In addition, since the insertion opening and the reception opening can be firmly integrated in the radial direction and the axial direction and fixed, a pile having a stable structure can be formed. Further, the rotation torque can be transmitted to the side surface of the groove via the filling member.

[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 a radial sectional view showing a joint structure of a pile according to the present invention.

FIG. 3 is an axial sectional view of an insertion hole forming a pile according to the present invention.

FIG. 4 is a radial sectional view of an insertion opening forming a pile according to the present invention.

FIG. 5 is an axial sectional view of a socket forming the pile according to the invention.

FIG. 6 is a radial sectional view of a socket forming a pile according to the present invention.

FIG. 7 is an axial sectional view showing a joint structure of a conventional pile.

FIG. 8 is a cross-sectional view illustrating a conventional method for forming a pile.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Lower pipe 2 Insertion opening 2a Outer peripheral surface 3 Upper pipe 4 Receptacle 4a Inner peripheral surface 5 Pile 6 End surface 7 Back end surface 14 Tape surface 15 Groove 16 Round hole 17 Round steel 18 Side surface 19 Packing member 20 Gap

Claims (1)

[Claims] 1. A pile formed by joining a plurality of cast pipes, a spigot formed at an end of one of the pipes joined to each other, and a socket formed at an end of the other pipe. And the inner end surface of the socket is capable of supporting a compressive force acting in the axial direction of the pile in contact with the end surface of the insertion hole, and the inner peripheral surface of the socket is A groove is formed along the axial direction of the receiving port, a through hole is formed at a position of the insertion port corresponding to the groove, and a rod is inserted into the groove while being passed through the through hole, A joint structure for a pile, wherein a wedge-shaped filling member is fitted into a gap between a side surface of the groove and the rod so as to fill a space between the bottom surface of the groove and an outer peripheral surface of the insertion opening.