JP2012087470A - Non-weld pile joint and manufacturing method for the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a non-weld pile joint capable of connecting between upper and lower piles weldlessly and with simple work and enabling sure transmission of axial force, bending moment and shear force between the upper and lower piles.SOLUTION: A non-weld pile joint is provided with a lower pile screw cylinder 4 installed in the upper end outer periphery of a lower pile 2, an upper pile screw cylinder 5 installed in the lower end outer periphery of an upper pile 3, and a coupler 8 comprising a screw cylinder screwed over both of the screw cylinders 4, 5. End plates 9, 10 are installed in the upper end surface of the lower pile 2 and the lower end surface of the upper pile 3. Mounting holes 11 are installed at a plurality of places in the circumferential direction of any one of the end plates 9, 10, and positioning holes 12 are installed in the other end plate 9 or 10. Positioning and shear force receiving bolts 13 to be installed in the mounting holes 11 to be inserted into the positioning holes are provided.

Description

  The present invention relates to a non-welded pile joint for connecting upper and lower piles in various piles such as piles that are pile foundations of buildings, such as steel pipe piles, concrete piles, steel pipe concrete combined piles, and a method for manufacturing the same, and the non-welded piles. The present invention relates to a pile connection structure using a joint.

Recent piles are required to have a performance that allows the piles to transmit force to the ground from the upper structure through the foundation. A single pile is composed of a single or a plurality of pile materials. When the pile is composed of a plurality of pile materials, the upper pile also bears a bending moment, and there are cases where various different pile materials are used. It has increased.
Conventionally, pile welding has been frequently used for field welding, but now there are also unwelded joint construction methods (for example, Patent Documents 1 and 2).

JP 2000-64273 A JP-A-9-119132

  The conventional non-welded pile joint construction method is complicated, and the installation work requires know-how. Moreover, in order to obtain the performance that the pile can reliably transmit the force to the ground through the foundation from the superstructure, there is a possibility that the transmission of the force in the joint becomes insufficient.

  In order to solve these problems, an attempt was made to provide screws on the upper and lower piles and connect them with a screw cylinder. However, the screw mounting cannot be tightened unless the phases of the upper and lower pile thread grooves are matched. Therefore, it is necessary to find the coincidence point of the phase of the thread groove of the upper and lower piles by changing the vertical position of the upper pile or turning the pile. Since such work is required, it is very difficult to find a matching point of the phase of this thread groove in a pile that is a large heavy object, and it is difficult to put it into practical use.

  Conventionally, in a connection structure between a pile head and a foundation reinforcing bar, a part of the connection structure is not welded, but there is a problem that connection is insufficient.

An object of the present invention is to provide a non-welded pile joint that can connect the upper and lower piles without welding and can easily transmit axial force, bending moment, and shear force between the upper and lower piles. That is.
Another object of the present invention is to provide a method by which the non-welded pile joint of the present invention can be manufactured simply and with each pile being compatible.
Still another object of the present invention is to provide a pile connection structure that can be firmly connected with a reinforcing bar of a foundation at a pile head with a simple structure.

  The non-welded pile joint of the present invention is a non-welded pile joint that connects the lower pile and the upper pile connected to each other without welding, and is provided on the outer periphery of the upper end of the pile body of the lower pile. A lower pile screw cylinder whose outer peripheral surface is a male screw, an upper pile screw cylinder which is provided on the outer periphery of the lower end of the pile body of the upper pile and whose outer peripheral surface is a male screw, and these lower pile screw cylinder and upper pile screw cylinder; A pair of end plates that are provided on the upper end surface of the lower pile and the lower end surface of the upper pile, and are in contact with each other in an overlapping state, and a pair of end plates, The inner circumference provided at a plurality of locations in the circumferential direction of either one of the end plates includes a female screw mounting hole, a positioning hole provided in the other end plate in alignment with the mounting hole, a male screw portion, and a dowel. The male threaded portion is screwed into each mounting hole of the one end plate and the dowel is the other Characterized in that it comprises a plurality of positioning and shearing force receiving bolt inserted into the positioning hole of the end plate.

According to this configuration, since the upper and lower piles have end plates that are in contact with each other, there is always a solid surface serving as a reference in the axial direction. That is, the end plate surface becomes the reference plane. Further, since the positioning / shearing force receiving bolts, which are attached to the attachment holes of one end plate, are inserted into the positioning holes of the other end plate, the circumferential phase relations of the upper and lower piles always coincide. Since the relationship between the axial position and the rotational direction position always coincides with each other in this way, if the phase relationship between the thread groove of the screw tube and the end plate and the positioning hole is correctly determined when manufacturing the upper and lower piles, At the site, the upper and lower piles are brought into contact with each other between the end plates, and the positioning holes and the mounting holes of the both end plates are made to coincide with each other so that the screw groove spirals in the screw cylinders of the upper and lower piles are continuous. Therefore, connection by a coupler made of a screw cylinder can be easily performed.
As for load transmission, the axial force is transmitted from the pile body to the lower part through the end plate, and the bending force is transmitted through the upper and lower screw cylinders and the coupler. The shearing force is mainly transmitted by the frictional force on the contact surfaces of the both end plates and the coupler, and when a certain amount of displacement occurs between the upper and lower piles due to the shearing force, the shearing force is also transmitted via the positioning / shearing force receiving bolt. Therefore, the axial force, bending moment, and shear force can be reliably transmitted between the upper and lower piles.

In this invention, the upper end of the lower pile and the lower end of the upper pile are provided with marks for matching the phases in the circumferential direction, the end plates of the lower pile and the upper pile overlap, and the upper and lower piles The lower pile screw cylinder and the upper pile screw cylinder may be in a positional relationship in which lines forming a spiral that is the center of the thread groove of the male screw portion are continuous with each other.
The mark does not necessarily need to be provided, but if the mark is applied, the positioning and shear force receiving bolt screwed into the end plate is inserted into the end plate positioning hole at the position where the upper and lower marks meet. This will improve workability on site.

  In this invention, you may shrink-fit the said coupler with respect to the said lower pile screw cylinder and an upper pile screw cylinder. That is, the coupler is screwed into the lower pile screw cylinder and the upper pile screw cylinder in a state where the diameter of the coupler is temporarily expanded by heating. After the fastening, when the coupler is cooled to room temperature and reduced in diameter, the gaps in the threaded portions of the female threads of the coupler and the male threads of the lower pile screw cylinder and the upper pile screw cylinder are filled, and there is no backlash of the coupler. In the case of shrink fitting, the inner diameter of the coupler is made smaller than that at the time of fastening at room temperature, and the dimensions are such that they are in a coupled state where there is no backlash as described above.

The manufacturing method of the non-welded pile joint of this invention is a method of manufacturing the non-welded pile joint of this invention, Comprising: The connection side end in either one of a lower pile screw cylinder and an upper pile screw cylinder A process of providing a thread groove start mark at a circumferential position that is a thread groove start position, and temporarily fixing the end plate to the screw cylinder, and stacking the other end plate on the end plate, the mounting hole and the positioning hole And connecting both end plates with manufacturing process bolts inserted through the end plate and disposing an annular spacer of a predetermined thickness on the end face of the one screw cylinder located on the outer periphery of the end plates. And a process of temporarily fixing the other screw cylinder and the end plate by screwing the coupler across the two screw cylinders while placing the other screw cylinder in contact with the end face of the spacer; The cylinder is marked with the mark for phase alignment at each other on-site connection. The process process of removing the bolts for the manufacturing process, welding both the screw cylinders and the end plates on the screw cylinder side to make joint parts composed of the screw cylinders and end plates, and attaching each joint part to the pile body Installation process.
According to this manufacturing method, the upper and lower end plates are connected with manufacturing process bolts to determine the phase relationship, and the axial positional relationship between the upper and lower screw cylinders with an annular spacer having a predetermined thickness interposed therebetween. The coupler is screwed over the upper and lower screw cylinders. Therefore, a joint component composed of the screw cylinder and the end plate is manufactured in a state where the axial position and the phase relationship are maintained with respect to one screw cylinder. Therefore, a plurality of lower piles and upper piles manufactured by this manufacturing method are prepared, and even if any lower pile and upper pile are combined, the upper and lower piles are brought into contact with each other between the end plates, and the positioning holes of both end plates By making the mounting holes coincide with each other, the screw groove spirals in the upper and lower pile screw cylinders are in a continuous positional relationship. For this reason, each pile becomes compatible and it is not necessary to prepare the upper and lower piles in a one-to-one relationship, and storage and management of the piles can be easily performed.

The pile connector structure of the present invention is a pile connector structure in which a plurality of piles are connected using the non-welded pile joint of any of the above configurations of the present invention, and an end plate is provided on the upper end surface of the upper pile. Provided with a plurality of screw holes in this end plate, a male screw part provided at the lower end of the reinforcing bar extending in the vertical direction of the pile upper foundation, and this male screw part screwed into the screw hole of the end plate of the upper end pile It is.
According to this configuration, the connection between the pile head and the reinforcing bar of the foundation on the pile can be firmly performed with a simple structure by using a mechanical fixing method using screws.

  In the pile connector structure of the present invention, an enlarged head may be provided at the upper end of the reinforcing bar. When an enlarged head is provided, there is no need to provide a U-shaped or L-shaped bent part for securing the fixing length, etc., and the basic rebar is simplified and the rebar is embedded in the foundation. The work can be simplified by avoiding interference with other objects.

  The non-welded pile joint of the present invention is a non-welded pile joint that connects the lower pile and the upper pile connected to each other without welding, and is provided on the outer periphery of the upper end of the pile body of the lower pile. A lower pile screw cylinder whose outer peripheral surface is a male screw, an upper pile screw cylinder which is provided on the outer periphery of the lower end of the pile body of the upper pile and whose outer peripheral surface is a male screw, and these lower pile screw cylinder and upper pile screw cylinder; A pair of end plates that are provided on the upper end surface of the lower pile and the lower end surface of the upper pile, and are in contact with each other in an overlapping state, and a pair of end plates, The male screw part having a screw hole provided at a plurality of locations in the circumferential direction of any one end plate, a positioning hole provided in alignment with the screw hole on the other end plate, a male screw part and a dowel So that the dowels are screwed into the respective screw holes of the one end plate and the dowels are positioned at the positions of the other end plate. With multiple positioning and shear force receiving bolts inserted into the fixed holes, it is possible to connect the upper and lower piles without welding and with simple operations, and the axial force, bending moment, and shear between the upper and lower piles The effect that force transmission is performed reliably is obtained.

  The manufacturing method of the non-welded pile joint of this invention is a method of manufacturing the non-welded pile joint of this invention, Comprising: The connection side end in either one of a lower pile screw cylinder and an upper pile screw cylinder A process of providing a thread groove start mark at a circumferential position to be a thread groove start position, and temporarily fixing the end plate to the screw cylinder, and stacking the other end plate on the end plate, the screw hole and the positioning hole And connecting both end plates with manufacturing process bolts inserted through the end plate and disposing an annular spacer of a predetermined thickness on the end face of the one screw cylinder located on the outer periphery of the end plates. And a process of temporarily fixing the other screw cylinder and the end plate by screwing the coupler across the two screw cylinders while placing the other screw cylinder in contact with the end face of the spacer; The cylinder is marked with the mark for phase alignment at each other on-site connection. The process process of removing the bolts for the manufacturing process, welding both the screw cylinders and the end plates on the screw cylinder side to make joint parts composed of the screw cylinders and end plates, and attaching each joint part to the pile body It is easy to manufacture the above unwelded pile joints, and the piles are interchangeable, so there is no need to prepare the upper and lower piles in a one-to-one relationship. And management is easy.

  The pile connector structure of the present invention is a pile connector structure in which a plurality of piles are connected using the non-welded pile joint of the present invention, and an end plate is provided on the upper end surface of the upper pile, and the end plate Since a plurality of screw holes are provided, a male screw part is provided at the lower end of the reinforcing bar extending in the vertical direction of the pile upper foundation, and this male screw part is screwed into the screw hole of the end plate of the upper end pile. Can be firmly connected with the reinforcing bar of the foundation on the pile with a simple structure.

It is a fracture front view and a partial front view of an unwelded pile joint concerning one embodiment of this invention. It is a fracture front view showing the state in the middle of connection work of the same non-welded pile joint. It is a partially-omission front view of the lower pile screw cylinder of the same non-welded pile joint. It is a flowchart of the manufacturing process of the non-welded pile joint. They are the partial expanded sectional view and the partial exploded perspective view which show the modification of the peripheral part of the positioning and shearing force receiving volt | bolt in the same non-welded pile joint. It is a partial abbreviation exploded perspective view of a pile connection object structure using the non-welded pile joint.

  An embodiment of the present invention will be described with reference to the drawings. The non-welded pile joint 1 is a joint that connects the lower pile 2 and the upper pile 3 connected to each other without welding. A lower pile screw cylinder 4 whose outer peripheral surface is externally threaded is provided on the outer periphery of the pile body 2A of the lower pile 2, and an upper pile screw whose outer peripheral surface is externally threaded on the outer periphery of the lower end of the pile body 3A of the upper pile 3 A cylinder 5 is provided. Each screw cylinder 4 and 5 consists of a steel pipe. The structure of each pile main body 2A, 3A is made into the hollow shaft-like composite pile structure which consists of the steel pipe 6 and the concrete 7 provided in the inner periphery of this steel pipe 6 in the example of illustration. In addition to this, each pile main body 2A, 3A may consist only of a steel pipe, or may consist only of concrete, and the pile main body 2A of the upper pile 2 and the pile main body 3A of the lower pile 3 May have different structures. The lower pile screw cylinder 4 and the upper pile screw cylinder 5 are fitted at the inner ends of the steel pipes 6 of the pile main bodies 2A and 3A, respectively, and are joined by a welded portion 21 such as fillet weld in the fitted state. Yes.

  A coupler 8 made of a screw cylinder having an inner peripheral surface formed as an internal thread is screwed onto the outer periphery over the lower pile screw cylinder 4 and the upper pile screw cylinder 5. The coupler 8 is made of a steel pipe. A pair of end plates 9, 10 are provided on the upper end surface of the lower pile 2 and the lower end surface of the upper pile 3, and these end plates 9, 10 overlap each other in the butted state of the lower pile 2 and the upper pile 3. To touch. These end plates 9 and 10 are annular plates made of steel plates, and are fitted into the upper end of the inner peripheral surface of the lower pile screw cylinder 4 and the lower end of the upper pile screw cylinder 5 so as to protrude from the end surfaces, respectively. The pile screw cylinder 4 and the upper pile screw cylinder 5 are joined by a welded portion 22 such as fillet weld.

  A plurality of locations in the circumferential direction of the end plate 9 of the lower pile 2 are provided with mounting holes 11 whose inner periphery is internally threaded, and the end plate 10 of the upper pile 3 is provided with positioning holes 12 in alignment with the mounting holes 11. ing. A male screw portion 13a of a positioning / shearing force receiving bolt 13 is screwed and attached to each mounting hole 11, and a dowel 13b of the positioning / shearing force receiving bolt 13 is attached to the positioning hole 12 of the end plate 10 on the upper pile 2 side. Is stuck in. Contrary to the above, the attachment hole 11 may be provided in the end plate 10 of the upper pile 3 and the positioning hole 12 may be provided in the end plate 9 of the lower pile 2. In the illustrated example, the mounting hole 11 and the positioning hole 12 are both screw holes having the same diameter, and the end plates 9 and 10 have the same configuration and are compatible parts. The dowel 13b of the positioning / shearing force receiving bolt 13 is a round shaft portion having the same or slightly smaller diameter than the groove bottom diameter of the male screw portion 13a. The number of the mounting holes 11 and the positioning holes 12 is preferably three or more, and is provided at, for example, about six to eight places depending on the pile diameter.

  Marks M <b> 1 and M <b> 2 are provided on the upper end of the outer peripheral surface of the lower pile 2 and the lower end of the outer peripheral surface of the upper pile 3 as shown in FIG. The marks M1 and M2 may be provided on the outer peripheral surfaces of the end plates 9 and 10, or may be provided on the outer peripheral surfaces of the screw cylinders 4 and 5 or the pile main bodies 2A and 3A. In this example, it is provided on the outer peripheral surface of the end plates 9 and 10. The marks M1 and M2 are, for example, lines along the axial direction. In the state where the end plates 9 and 10 of the lower pile 2 and the upper pile 3 overlap and the phases of the marks M1 and M2 of the piles 2 and 3 on both sides match, the lower pile screw cylinder 4 and the upper pile screw cylinder 5 The lines forming a spiral that is the center of the thread groove of the male thread portion are continuous.

  In the on-site connection work of the unwelded pile joint 1 having this configuration, as shown in FIG. 2, the positioning / shearing force receiving bolts 13 and the male screw portions 13 a are screwed into the mounting holes 11 of the end plates 9 of the lower pile 2. The entire coupler 8 is screwed into the lower pile screw cylinder 4. The entire coupler 8 may be screwed into the upper pile screw cylinder 5. In this state, the upper pile 3 is placed on the lower pile 2 so that the dowels 13b of the positioning and shearing force receiving bolts 13 attached to the lower pile 2 fit into the positioning holes 12 of the end plate 10 of the upper pile 3. It mounts so that the end plates 9 and 10 may overlap. At this time, the positional relationship in which the lines forming the spirals of the thread grooves of the lower pile screw cylinder 4 and the upper pile screw cylinder 5 are connected by fitting the dowels 13b and the positioning holes 12 with which the marks M1 and M2 coincide with each other. become. Therefore, the coupler 8 on the outer periphery of the lower pile screw cylinder 4 is screwed into the upper pile screw cylinder 5 by screwing back. Thus, the lower pile 2 and the upper pile 3 are connected by setting the coupler 8 in a state of being screwed over both the lower pile screw cylinder 4 and the upper pile screw cylinder 5 as shown in FIG. It becomes a state.

  In this case, since the upper and lower piles 3 and 2 have end plates 9 and 10 that are in contact with each other, there is always a solid surface serving as a reference in the axial direction. That is, the surfaces of the end plates 9 and 10 become reference surfaces. Further, since the positioning / shearing force receiving bolts 13 attached to the attachment holes 11 of the one end plate 9 are inserted into the positioning holes 12 of the other end plate 10, the circumferential phase of the upper and lower piles 3, 2 is increased. The relationship is always consistent. Thus, since the relationship between the axial position and the rotational position always coincides with each other, the phase of the thread groove of the screw cylinders 4, 5 and the end plates 9, 10 and the mounting holes 11, If the positional relationship with the positioning hole 12 is correctly determined, the upper and lower piles 2 and 3 are brought into contact with each other between the end plates 9 and 10 and the positioning holes 12 and the mounting holes 12 of the both end plates 9 and 10 are made to coincide with each other. Thus, the spiral relationship of the thread grooves in the screw cylinders 4 and 5 of the upper and lower piles 9 and 10 is continuous (however, it is necessary to select the positioning hole 12 and the mounting hole 12 that are in phase). Therefore, the connection by the coupler 8 made of a screw cylinder can be easily performed.

  In this connected state, the axial force due to the upper structure acting on the upper pile 3 is transmitted from the pile main body 3A composed of the concrete 6 and the steel pipe 6 to the pile main body 2A of the lower pile 2 through the end plates 10 and 9. The The bending moment is transmitted through the upper pile screw cylinder 5, the lower pile screw cylinder 4, and the coupler 8. The shearing force is mainly transmitted by the frictional force on the contact surfaces of the both end plates 9 and 10 and the coupler 8, and when a certain amount of displacement occurs between the upper and lower piles 3 and 2 due to the shearing force, the positioning and shearing force receiving bolt Since the 13 dowels 13 b are in contact with the inner peripheral surface of the positioning hole 12, the dowels 13 b are also transmitted through the positioning and shearing force receiving bolts 13.

  In the above example, the coupler 8 is fastened at room temperature, but the coupler 8 may be shrink-fitted to the lower pile screw cylinder 5 and the upper pile screw cylinder 4. That is, the coupler 8 may be screwed into the lower pile screw cylinder 4 and the upper pile screw cylinder 5 in a state where the diameter of the coupler 8 is temporarily expanded by heating. In this case, when the coupler 8 is cooled to room temperature after fastening, the diameter of the coupler 8 is reduced, and the gap between the threaded portions of the female screw of the coupler 8 and the male thread of the lower pile screw cylinder and the male thread of the upper pile screw cylinder is filled, and the coupler rattling is eliminated. . In addition, when shrink-fitting, the inner diameter of the coupler 8 is made smaller than that at the time of fastening at room temperature, and the dimensions are such that the coupling state is free from rattling as described above. In case of shrink fitting, when the upper and lower piles 2 and 3 are stored, they cannot be screwed into either of the screw cylinders 4 and 5, so they are stored away from the piles 2 and 3, At the time of connection, it is screwed as shown in FIG. 2 and screwed back as shown in FIG.

  Next, the manufacturing method of this unwelded pile joint 1 is demonstrated with FIG. First, with respect to any one of the end plates 9 and 10, for example, as shown in FIG. 4A, the lower end plate 9 and the lower pile screw cylinder 4 which is a screw cylinder corresponding to the end plate, in the circumferential direction. And the position of an axial direction is defined and it temporarily attaches with the temporary welding part 23. FIG. Regarding the circumferential direction, a start position mark M3 (see FIG. 3) is used as a mark indicating the start position of the thread groove at the circumferential position that is the start position S (FIG. 3) of the thread groove at the connection side end of the lower pile screw cylinder 4. 4 (A) (a)) is applied to the end face of the lower pile screw cylinder 4 or the like. The start position mark M3 may be used in combination with the phase alignment mark M1 or may be provided separately. The end plate 9 and the lower pile screw cylinder 4 are aligned so that the start position mark M3 and the center of one of the attachment holes 11 of the end plate 9 (the center of the positioning hole when the end plate 9 is provided with a positioning hole). And determine the position in the circumferential direction. In this case, a mark M4 indicating the center of the mounting hole 11 may be attached to the outer peripheral edge of the end plate 9, and in that case, by combining both marks M3 and M4, the circumference can be more easily and accurately. The position of the direction can be determined. Regarding the axial direction, the upper surface of the end plate 9 protrudes from the end face of the lower pile screw cylinder 4 by a predetermined distance a. This distance a is ½ of the thickness 2a of the spacer 51 used in the next process, but the thickness 2a may be an arbitrarily determined distance.

  Next, as shown in FIG. 4B, another end plate 10 is overlaid on the end plate 9 and inserted through the mounting holes 11 and the positioning holes 12 of the end plates 9 and 10. Both end plates 9 and 10 are joined by bolts 52 and nuts 52A. The annular spacer 53 having the above defined thickness 2a is placed on the end face of the lower pile screw cylinder 4 located on the outer periphery of the end plates 9 and 10.

Thereafter, as shown in FIG. 4C, the upper pile screw cylinder 5 which is the other screw cylinder is arranged on the spacer 53, and the coupler 8 is screwed over both the screw cylinders 4 and 5. The coupler 8 may be a product used as a product or may be dedicated for the manufacturing process. In this state, the upper pile screw cylinder 5 and the upper end plate 10 are temporarily attached by the temporary welding portion 24. In this state, since both screw cylinders 4 and 5 are connected by the coupler 8, if the axial and circumferential positions can be reproduced even after being separated from each other, the screw grooves of both screw cylinders 4 and 5 are The spiral shapes are continuous and can be connected by the coupler 8. In order to facilitate the reproduction, the marks M1 and M2 (FIG. 1 (B)) are provided on the screw cylinders 4 and 5 for phase alignment at the on-site connection. In addition, if the position in the axial direction is in contact with the end plates 9 and 10, the positional relationship between the screw cylinders 4 and 5 is naturally reproduced.
Next, the manufacturing process bolt 52 is removed, and both screw cylinders 4 and 5 and the end plates 9 and 10 on the side of the screw cylinders 4 and 5 are welded to the welded portions 22 (FIG. 1) of the main welding, respectively. A joint part 25 composed of the cylinder 4 and the end plate 9 and a joint part 26 composed of the upper pile screw cylinder 5 and the end plate 10 are used. The lower pile 2 and the upper pile 3 are obtained by attaching the joint components 25 and 26 thus manufactured to the pile main bodies 2A and 3A.

  By manufacturing the lower pile 2 and the upper pile 3 by this manufacturing method, the unwelded pile joint 1 can be easily manufactured. In addition, when manufacturing a plurality of lower piles 2 and upper piles 3, even if a plurality of lower piles 2 and upper piles 3 are manufactured using the spacers having the same thickness 2 a, The combination of the lower pile 2 and the upper pile 3 can be manufactured as a compatible one that can be connected even if freely combined. Therefore, it is not necessary to prepare and store the lower piles 3 and 2 in a one-to-one relationship, and the piles 2 and 3 can be easily stored and managed.

  In the above embodiment, the dowel 13b of the positioning and shearing force receiving bolt 13 is directly fitted into the positioning hole 12 of the end plate 10 on the upper pile 2 side as shown in FIG. As shown, a cylindrical gap filling cylinder 29 whose outer periphery is a male screw is screwed into a positioning hole 12 formed of a screw hole in the end plate 10 on the upper pile 2 side, and a positioning and shearing force receiving bolt is inserted into this gap filling cylinder 29. Thirteen dowels 13b may be fitted. Even if the dowel 13b is fitted after the gap filling cylinder 29 is screwed into the positioning hole 12, or after the dowel 13b is fitted into the positioning hole 12, the gap filling cylinder 29 is inserted into the dowel 13b. The gap filling cylinder 29 may be screwed into the positioning hole 12 so as to fit. By providing the gap filling cylinder 29 in this way, the play around the dowel 13b is packed, so that the shearing force can be transmitted more reliably. Other configurations in FIG. 5 are the same as those in the example of FIG.

  FIG. 6 shows an embodiment of a pile connector structure. This pile connection body structure is a pile connection body structure in which a plurality of piles 30 are connected using the non-welded pile joint 1 of the embodiment of FIG. )). Each pile 30 becomes the lower pile 2 or the upper pile 3 described above. In the pile connection body in which three or more piles 30 are connected, the intermediate pile 30 becomes the lower pile 2 in the unwelded pile joint 1 on the upper side of the intermediate pile 30 and in the lower unwelded pile joint 1. It becomes the upper pile 3. The non-welded pile joint 1 is illustrated in a simplified manner in FIG.

  In the pile foundation composed of this pile connection body, an end plate 31 is provided on the upper end surface of the upper pile 30A in order to connect reinforcing bars to the pile upper foundation (not shown) provided on the pile foundation. A plurality of screw holes 32 are provided in the end plate 31, and a male screw part 34 a is provided at the lower end of each reinforcing bar 34 which is a main reinforcing bar extending in the vertical direction of the pile foundation. The male screw portion 34a is screwed into the screw hole 32 of the end plate 31 of the upper pile 30A. In the figure, only one reinforcing bar 34 is shown, and the other reinforcing bars are not shown. For example, the male thread portion 34a is obtained by cutting a male thread into a round bar having a diameter larger than that of the rebar main body 34b of the rebar 34 and joining the end surface of the rebar main body 34b by friction welding or the like. At the other end of the reinforcing bar 34, an enlarged diameter head 34c for fixing is provided. The above foundation on piles is not particularly limited as long as the foundation is used together with the pile foundation, and may be an independent foundation, a columnar foundation to which foundation beams are connected, or a cloth foundation.

  According to the pile connector structure having this configuration, the pile head and the reinforcing bar 34 on the pile foundation can be firmly connected with a simple structure using a mechanical fixing method using screws. Moreover, since the enlarged diameter head 34c is provided at the upper end of the reinforcing bar 34, there is no need to provide a U-shaped or L-shaped bent portion for securing the fixing length, and the bar arrangement on the pile foundation is simplified. The work can be simplified by avoiding interference between the reinforcing bar 34 and other objects embedded in the foundation on the pile.

DESCRIPTION OF SYMBOLS 1 ... Non-welded pile joint 2 ... Lower pile 3 ... Upper pile 2A, 3A ... Pile main body 4 ... Lower pile screw cylinder 5 ... Upper pile screw cylinder 6 ... Steel pipe 7 ... Concrete 8 ... Coupler 9, 10 ... End plate 11 ... Installation Hole 12 ... Positioning hole 13 ... Positioning and shearing force receiving bolt 31 ... End plate 34 ... Reinforcing bar 34a ... Male screw part 32 ... Screw hole 53 ... Spacers M1, M2 ... Mark M3 ... Start position mark

Claims (5)

A non-welded pile joint that connects a lower pile and an upper pile connected to each other without welding,
A lower pile screw cylinder provided on the outer periphery of the upper end of the pile body of the lower pile, and an upper pile screw cylinder provided on the outer periphery of the lower end of the pile body of the upper pile, and the outer peripheral surface of which is a male screw. And a coupler made of a screw cylinder screwed onto the outer periphery across the lower pile screw cylinder and the upper pile screw cylinder, and provided in contact with each other in an overlapping state provided on the upper end surface of the lower pile and the lower end surface of the upper pile, respectively. A pair of end plates, and inner surfaces provided at a plurality of positions in the circumferential direction of either one of the pair of end plates are aligned with the mounting holes of the female screw and the mounting holes on the other end plate. A plurality of positioning holes, a male screw portion and a dowel, and a plurality of dowels inserted into the positioning holes of the other end plate by being screwed into the mounting holes of the one end plate at the male screw portion. Non-weld characterized by comprising a positioning and shearing force receiving bolt Joint.   In Claim 1, the mark for adjusting the phase of a circumferential direction mutually is given to the upper end of the said lower pile, and the lower end of an upper pile, the said end plates of the said lower pile and an upper pile overlap, and the said upper and lower sides A non-welded pile joint in which the lower pile screw cylinder and the upper pile screw cylinder are in a positional relationship in which lines forming a spiral that is the center of the thread groove of the male screw portion are continuous with each other in a state in which the phases of the marks of the pile are matched.   3. The non-welded pile joint according to claim 1 or 2, wherein the coupler is shrink-fitted to the lower pile screw cylinder and the upper pile screw cylinder.   It is a manufacturing method of the non-welded pile joint of any one of Claim 1 thru | or 3, Comprising: The screw | thread of the connection side end in any one screw cylinder of a lower pile screw cylinder and an upper pile screw cylinder A thread groove start mark is provided at a circumferential position to be a groove start position, the process of temporarily fixing the end plate to the screw cylinder, the other end plate is overlapped on the end plate, the mounting hole and the positioning hole Connecting both end plates with a manufacturing process bolt inserted through the end plate, and disposing an annular spacer of a predetermined thickness on the end surface of the one screw cylinder, located on the outer periphery of the end plates; A process of placing the other screw cylinder in contact with the end face of the spacer, screwing the coupler over both screw cylinders, and temporarily fixing the other screw cylinder to the end plate; And attaching the mark for phasing at each other's on-site connection The process of removing the bolts for manufacturing process, welding both screw cylinders and end plates on the screw cylinder side, respectively, to make joint parts consisting of the screw cylinders and end plates, and attaching each joint part to the pile body; Of manufacturing a non-welded pile joint.   A pile connector structure in which a plurality of piles are connected using the non-welded pile joint according to any one of claims 1 to 3, wherein an end plate is provided on an upper end surface of the upper end pile. A pile connector structure in which a plurality of screw holes are provided in the end plate, a male screw portion is provided at the lower end of the reinforcing bar extending in the vertical direction of the foundation on the pile, and this male screw portion is screwed into the screw hole of the end plate of the upper end pile. .

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