JP6245815B2 - Joint structure between pile and superstructure - Google Patents

Description

  The present invention relates to a joint structure between an upper structure to be constructed and a pile that supports, for example, a steel column of the upper structure.

  Conventionally, as a technique in such a field, there is Japanese Patent No. 3647842. In the joint structure between the pile and the upper structure described in this publication, a disk-shaped adjustment plate fixed by welding in the upper end opening of the pile head is used. A long hole extending in the radial direction from the center is formed in the adjustment plate, and a central bolt (centering rod) is passed through the long hole. A cover cap for holding the center bolt is disposed on the back surface of the adjustment plate, and this cover cap prevents the center bolt from falling into the pile head from the long hole. The center bolt is inserted into the center hole formed in the pile head plate (top plate) from below, and the shaft of the center bolt has an adjustment plate and a pile head plate in cooperation with the head of the center bolt. An adjustment nut for screwing in by operation is screwed. And the pile head plate fixed to the pile head and the base plate of the column base which makes a part of upper structure are fastened by the connection bolt.

Japanese Patent No. 3647841 Japanese Patent No. 4492146

  In the conventional joint structure between the pile and the superstructure, the adjustment plate with the center bolt attached is directly fixed to the pile head. Therefore, the center bolt that has been centered is measured when it is fixed. It is necessary to keep it in an accurate state. However, when fixing the adjustment plate to the pile head, the center bolt that has been centered and surveyed before fixing the center plate will be distorted in the horizontal accuracy and height position if the adjustment plate is tilted even a little. There is a problem that the adjustment plate must not be tilted or moved horizontally or vertically in the pile head, and the workability of adjusting the position of the center bolt is very poor.

  An object of this invention is to provide the joining structure of the pile and superstructure which made the position adjustment operation | work of a centering rod easy.

The present invention includes a hollow pile erected on the ground,
A sheath tube that is arranged around the pile head exposed from the ground and the top plate is fixed to the upper end,
A filler made of mortar or concrete filled between the sheath tube and the pile;
An upper structure fixed to the top plate;
A centering rod inserted from below into a center hole formed in the center of the top plate,
Pile head cap equipment with a centering rod extending in the vertical direction
A ring plate fixed horizontally to the pile head so as to close the upper end of the pile head,
A centering rod horizontal position adjusting means for allowing the centering rod to move only in the horizontal direction with reference to the level of the ring plate within the inner opening formed in the ring plate ;
A bracket fixed to the back of the ring plate;
A fastening bolt screwed to the bracket,
The ring plate is characterized in that it is fixed to the pile head by pressing a tightening bolt against the inner wall surface of the pile head .
The present invention also includes a hollow pile erected on the ground,
A sheath tube that is arranged around the pile head exposed from the ground and the top plate is fixed to the upper end,
A filler made of mortar or concrete filled between the sheath tube and the pile;
An upper structure fixed to the top plate;
A centering rod inserted from below into a center hole formed in the center of the top plate,
Pile head cap equipment with a centering rod extending in the vertical direction
A ring plate fixed horizontally to the pile head so as to close the upper end of the pile head,
A centering bar horizontal position adjusting means for allowing the centering bar to move only in the horizontal direction with reference to the level of the ring plate within the inner opening formed in the ring plate, and
The centering bar horizontal position adjustment means
A disc horizontally supported by a ring plate and fitted into a circular inner opening;
An elongated hole that extends in the radial direction of the disc and through which the centering rod passes,
A slide part attached to the centering rod so as to sandwich the disk up and down,
A ring-shaped support plate is arranged between the ring plate and the upper end of the pile head, the outer peripheral end of the support plate is arranged at the upper end of the pile head, and the inner peripheral end of the support plate is the inner opening of the ring plate It protrudes inward from the part and supports the disk from below.

  In the joint structure between the pile and the superstructure, a ring plate is used for the pile head cap device that has a centering rod extending in the vertical direction. It is only necessary to move the centering bar only in the horizontal direction for centering by the centering position adjusting means. Therefore, it is easy to improve the centering accuracy of the centering rod, and the position adjusting operation of the centering rod becomes extremely easy. Furthermore, by adopting a ring plate, it becomes easy to adopt various configurations for the centering rod horizontal position adjusting means, and the centering rod horizontal position adjusting means for moving the centering rod in the horizontal direction can be applied. The range of sex can be expanded.

The centering rod horizontal position adjusting means includes a disc horizontally supported by the ring plate and fitted into a circular inner opening, a long hole extending in the radial direction of the disc and through which the centering rod passes. And a slide portion attached to the centering rod so as to sandwich the disc vertically.
When such a configuration is adopted, a centering rod is obtained by rotating the disc within the ring plate so as to rotate the disc within the horizontal plane and linearly moving the centering rod within the elongated hole of the disc. Can be easily and reliably moved to a desired position in the horizontal plane while being maintained in the vertical direction.

A ring-shaped support plate is arranged between the ring plate and the upper end of the pile head, the outer peripheral end of the support plate is arranged at the upper end of the pile head, and the inner peripheral end of the support plate is the inner opening of the ring plate. It protrudes inward from the part and supports the disk from below.
By adopting such a configuration, the vertical load transmitted to the disk via the mortar or concrete between the top plate and the disk can be reliably transmitted to the pile head via the support plate. Deformation of the head cap device can be prevented appropriately.

The slide portion includes a head portion of a centering rod that contacts the lower surface of the disk, and a nut that contacts the upper surface of the disk and is screwed to the shaft portion of the centering rod.
If such a structure is employ | adopted, a centering stick | rod can be fixed easily and reliably in a desired position by the tightening operation | work of a nut.

In the centering rod horizontal position adjusting means, the centering rod is inserted into the inner opening of the ring plate, and the centering rod is attached to the slide portion that sandwiches the ring plate vertically.
When such a configuration is employed, the centering rod can be easily moved to a desired position in the horizontal plane within the inner opening of the ring plate while maintaining the centering rod in the vertical direction.

In addition, the slide portion contacts the lower surface of the ring plate, and the lower slide plate through which the shaft portion of the centering rod passes, and the upper slide plate which contacts the upper surface of the ring plate and through which the shaft portion of the centering rod passes. And a head portion of a centering rod that contacts the lower surface of the lower slide plate, and a nut that contacts the upper surface of the upper slide plate and is screwed to the shaft portion of the centering rod.
By adopting such a configuration, the slide part can be easily and reliably slid in any direction within the horizontal plane by loosening the nut, and the centering rod can be moved to the desired position by tightening the nut. It can be fixed easily and reliably.

Further, the upper end of a hanging rod extending in the vertical direction is fixed to the ring plate, and a closing plate disposed in the pile is fixed to the lower end of the hanging rod.
In this way, a closing plate for reliably filling the pile head with mortar or concrete can be configured using the ring plate.

Further, a height adjustment bolt that protrudes upward is attached to the ring plate.
If such a structure is employ | adopted, the height adjustment of a top plate can be easily performed only by mounting a top plate on the upper end of a height adjustment bolt. And since the height adjustment bolt is being fixed to the ring plate, it is effective when the top plate is large.

Moreover, the height adjustment bolt which protrudes upwards is mounted | worn with the disc.
If such a structure is employ | adopted, the height adjustment of a top plate can be easily performed only by mounting a top plate on the upper end of a height adjustment bolt. And since the height adjustment bolt is being fixed to the disc, it is effective when the top plate is small.

The present invention includes a hollow pile erected on the ground,
A sheath tube that is arranged around the pile head exposed from the ground and the top plate is fixed to the upper end,
A filler made of mortar or concrete filled between the sheath tube and the pile;
An upper structure fixed to the top plate;
A centering rod inserted from below into a center hole formed in the center of the top plate,
Pile head cap equipment with a centering rod extending in the vertical direction
A ring-shaped support plate on which the outer peripheral end is placed on the upper end of the pile head;
A disk disposed on the upper surface of the support plate so as to close the inner opening of the support plate;
A locking piece that protrudes from the upper surface of the support plate and restricts the horizontal movement of the outer peripheral edge of the disk,
And a centering bar horizontal position adjusting means for allowing the centering bar to move in the horizontal direction.
By adopting such a configuration, the vertical load transmitted to the disk via the mortar or concrete between the top plate and the disk can be reliably transmitted to the pile head via the support plate. Deformation of the head cap device can be prevented appropriately.

An upper end of a hanging rod extending in the vertical direction is fixed to the support plate, and a closing plate disposed in the pile is fixed to the lower end of the hanging rod.
In this way, a closing plate for reliably filling the pile head with mortar or concrete can be configured using the support plate.

A height adjustment bolt that protrudes upward is attached to the support plate.
If such a structure is employ | adopted, the height adjustment of a top plate can be easily performed only by mounting a top plate on the upper end of a height adjustment bolt. And since the height adjustment bolt is being fixed to the support plate, it is effective when the top plate is large.

  According to the present invention, the position adjusting operation of the centering rod can be facilitated.

It is sectional drawing which shows one Embodiment of the junction structure of the pile and upper structure which concern on this invention. It is sectional drawing which shows the state by which the top plate was fixed to the pile head. It is a perspective view which shows a pile head cap implement. It is a top view of a pile head cap implement. It is sectional drawing which follows the aa line of FIG. It is sectional drawing which follows the bb line of FIG. It is sectional drawing which follows the cc line of FIG. It is sectional drawing which follows the dd line | wire of FIG. It is sectional drawing which shows the state with which the cylindrical tube was mounted | worn with the top plate. FIG. 10 is a plan view of FIG. 9. It is sectional drawing which concerns on the modification 1 and shows the other example of the state with which the cylindrical tube was mounted | worn with the top plate. It is a top view which concerns on the modification 2 and shows the 1st modification of a pile head cap implement. It is sectional drawing which follows the aa line of FIG. It is sectional drawing which follows the bb line of FIG. It is a top view which shows the 2nd modification of a pile head cap implement. It is sectional drawing which follows the aa line of FIG. It is sectional drawing which follows the bb line of FIG. It is a top view which shows the 3rd modification of a pile head cap implement. It is sectional drawing which follows the aa line of FIG. It is sectional drawing which follows the bb line of FIG. It is sectional drawing which follows the cc line of FIG. It is sectional drawing which follows the dd line | wire of FIG. It is a top view which shows the 4th modification of a pile head cap implement. It is sectional drawing which follows the aa line of FIG. It is sectional drawing which follows the bb line of FIG. It is sectional drawing which follows the cc line of FIG. It is sectional drawing which follows the dd line | wire of FIG. It is sectional drawing which concerns on the modification 3, and shows the further another example of the state with which the cylindrical tube was mounted | worn with the top plate. It is a top view which shows the further another modification of a pile head cap implement. It is sectional drawing which follows the aa line of FIG. It is a top view which shows the further another modification of a pile head cap implement. It is sectional drawing which follows the aa line of FIG. It is sectional drawing which shows a structure in order to fix a sheath pipe without using a fixing jig.

  Hereinafter, a preferred embodiment of a joint structure between a pile and an upper structure according to the present invention will be described in detail with reference to the drawings. In addition, about the same or equivalent structure, the same code | symbol is attached | subjected and the overlapping description is abbreviate | omitted.

  As shown in FIG. 1, a steel pipe pile 1 is driven into the ground A to a predetermined depth, and the hollow steel pipe pile 1 is a steel column 2 that forms part of an upper structure (for example, a building or a house). Is buried deeply in the ground A. The pile head 1 </ b> A of the steel pipe pile 1 is excavated and exposed to the soil of the ground A around the steel pipe pile 1 after the completion of the embedding of the steel pipe pile 1, and is cut at a height position planned by surveying. At this time, if the protrusion is provided on the outer surface of the portion of the pile head 1A that will be in contact with the filler M1 later, the pile head 1A and the filler M1 can be more securely fixed. The shape and formation method of the protrusions are not particularly limited, and can be formed by, for example, installing a cylindrical weld bead or welding flat steel.

  The base plate 3 provided at the lower end of the steel column 2 is connected to the top plate 4 fixed to the pile head 1A side by a connecting bolt 6. The top plate 4 is welded at the upper end of the sheath pipe 7 disposed around the pile head 1A, and between the sheath pipe 7 and the pile head 1A, mortar or concrete M1 for reinforcing the pile head 1A is provided. Filled. Moreover, the mortar or concrete M2 for reinforcing the pile head 1A is also filled in the pile head 1A. The sheath tube may be cylindrical or rectangular.

  The lower end opening of the sheath tube 7 is closed by a ring-shaped lid plate 8 extending in the horizontal direction on the outer periphery of the pile head 1A, and the lid plate 8 is fixed to a predetermined position of the pile head 1A by a fixing jig 9. Can be made. The fixing jig 9 includes a cylindrical portion 9a disposed around the pile head 1A and a fastening bolt 9b screwed in the horizontal direction with respect to the cylindrical portion 9a. With such a fixing jig 9, the cover plate 8 can be kept in contact with the lower end of the sheath tube 7, and the filler M1 made of mortar or concrete can be reliably placed between the sheath tube 7 and the pile head 1A. Can be filled. A filling hole 4 a is formed in the top plate 4, and a filling material M 1 made of mortar or concrete is injected from above between the sheath tube 7 and the pile head 1 A through the filling hole 4 a, and the mortar is covered by the cover plate 8. Or the flow of concrete M1 is prevented. The cover plate 8 is made of a relatively soft material such as expanded polystyrene, expanded polyethylene, or sponge.

  As another example, in order to fix the sheath tube without using a fixing jig, a configuration as shown in FIG. 33 may be adopted. In the configuration of this figure, after positioning the sheath tube, the filler M4 made of mortar or concrete is filled to the height of the lower end of the sheath tube 7, and after the filler M4 is cured, the filler M1 is injected.

  A circular closing plate 5 is disposed at a predetermined height in the pile head 1A, and the closing plate 5 can reliably fill the pile head 1A with mortar or concrete M2. Further, a filler M3 made of mortar or concrete is also filled between the base plate 3 and the top plate 4. As shown in FIG. 2 and FIG. 3, the closing plate 5 is configured to sandwich a disk-shaped wall follower plate 5 c made of resin between a metal-made upper plate 5 a and a lower plate 5 b. Since the outer free end of the wall surface follower plate 5c is along the inner wall surface of the pile head 1A, the diameter of the pile head 1A can be adjusted to some extent. The wall follower plate 5c is formed with a plurality of cut portions 5d extending in the radial direction at equal intervals in the circumferential direction, thereby enhancing the followability of the wall follower plate 5c with respect to the inner wall surface of the pile head 1A. Can do.

  As described above, in order to securely connect the base plate 3 on the steel column 2 side and the top plate 4 on the pile head 1A side by the connecting bolt 6, the connecting hole 3a of the base plate 3 and the connecting hole 4b of the top plate 4 are used. Must be aligned in the vertical direction. Therefore, it is necessary to adjust the horizontal position of the top plate 4 in order to perform alignment based on the planned installation position of the base plate 3 on the steel column 2 side that forms a part of the upper structure. Tool 10 is used.

  As shown in FIGS. 2 to 4, the pile head cap device 10 includes a ring plate 11 placed on the upper end of the pile head 1 </ b> A so as to close the upper end opening of the pile head 1 </ b> A. A circular plate 12 that is horizontally supported by the ring plate 11 is fitted into the circular inner opening 11 a of the ring plate 11. The circular plate 12 is supported by an L-shaped bracket 13 disposed on the back surface of the ring plate 11 by welding. The horizontal support piece 13a of each bracket 13 is exposed at the front end side from the inner opening 11a of the ring plate 11, and the disc 12 is supported in the inner opening 11a by the horizontal support piece 13a extending in the horizontal direction. Can be rotated in a horizontal plane.

  Fastening bolts 14 are screwed to the vertical pieces 13b of the brackets 13 in the horizontal direction. The tightening bolt 14 can be turned by inserting a hand from the inner opening 11a with the disc 12 removed from the ring plate 11, and the tightening bolt 14 can be rotated with the ring plate 11 placed on the upper end of the pile head 1A. The ring plate 11 can be fixed to the pile head 1A by pressing the tip against the inner wall surface of the pile head 1A (see FIG. 5).

  A long hole 12a extending in the horizontal direction and in the radial direction is formed in the disc 12, and a centering rod 16 extending in the vertical direction passes through the long hole 12a. A slide portion 17 is attached to the centering rod 16 so as to sandwich the disc 12 vertically. The slide portion 17 includes a head portion 16a of the centering rod 16 that contacts the lower surface of the disc 12, and a nut 18 that contacts the upper surface of the disc 12 and is screwed to the shaft portion 16b of the centering rod 16. , Is composed of. By loosening the nut 18, the centering rod 16 can be freely moved along the long hole 12 a, and the centering rod 16 can be easily and reliably fixed at an arbitrary position by tightening the nut 18. Can do.

  Further, the centering rod horizontal position adjusting means 20 for making the centering rod 16 movable in the horizontal direction with reference to the level of the ring plate 11 in the inner opening portion 11a of the ring plate 11 is a ring plate 11 in a horizontal state. A circular plate 12 fitted into the circular inner opening 11a and horizontally supported from below; a long hole 12a extending in the radial direction of the circular plate 12 and through which the shaft portion 16b of the centering rod 16 passes; And a slide portion 17 attached to a centering rod 16 so as to sandwich the disc 12 vertically.

  When such a configuration is adopted, a disc rotation that rotates the disc 12 within the ring plate 11 and a centering rod linear movement that moves the centering rod 16 within the elongated hole 12a of the disc 12; The centering rod 16 can be easily and reliably moved to a desired position in the horizontal plane while being maintained in the vertical direction.

  A pressing plate 21 (see FIG. 6) for fixing the disc 12 is disposed on the upper surface of the ring plate 11, and the pressing plate 21 is rotated around a bolt 22 screwed to the ring plate 11. be able to. With the bolts 22 loosened, the disc 12 can be freely rotated within the inner opening 11a, and the bolts 22 can be tightened so that the disc 12 does not move. Further, the disc 12 can be attached and detached by rotating the pressing plate 21 to a position where it does not face the inner opening 11a, that is, rotating the pressing plate 21 so as to retract.

  As described above, since the ring plate 11 is employed in the pile head cap device 10 including the centering rod 16 extending in the vertical direction, the centering rod is horizontal with reference to the leveled ring plate 11. The centering rod 16 need only be moved in the horizontal direction for centering by the position adjusting means 20. Therefore, it is easy to improve the centering accuracy of the centering rod 16, and the position adjusting operation of the centering rod 16 becomes extremely easy. Further, by adopting the ring plate 11, it becomes easy to adopt various configurations for the centering bar horizontal position adjusting means 20, and the centering bar horizontal position adjusting means for moving the centering bar 16 in the horizontal direction. The range of 20 applicability can be expanded.

  Further, the upper end of a hanging rod 23 extending in the vertical direction is fixed to the ring plate 11, and the circular closing plate 5 disposed in the pile head 1 </ b> A is fixed to the lower end of the hanging rod 23. (See FIG. 7). A male screw portion 23a that penetrates the ring plate 11 is formed at the upper end of the hanging rod 23 that is arranged at equal intervals in the horizontal direction, and a male screw portion that penetrates the closing plate 5 at the lower end of the hanging rod 23. 23b is formed. The upper end of the hanging rod 23 is fixed to the ring plate 11 by a pair of nuts 24 a and 24 b that sandwich the ring plate 11, and the lower end of the hanging rod 23 is closed by a pair of nuts 26 a and 26 b that sandwich the closing plate 5. It is fixed to the plate 5. Thus, the closing plate for reliably filling the pile head 1 </ b> A with mortar or concrete M <b> 2 can be configured using the ring plate 11.

  A height adjustment bolt 27 protruding upward is attached to the ring plate 11 (see FIG. 8). The height adjusting bolt 27 used for placing the top plate 4 penetrates the ring plate 11 and is screwed to a nut 28 fixed to the ring plate 11 by welding. A lock nut (not shown) may be further disposed on the nut 28. Therefore, by turning the height adjustment bolt 27, the amount of upward protrusion of the height adjustment bolt 27 can be adjusted steplessly. Note that a female screw may be formed on the ring plate 11 and the height adjusting bolt 27 may be screwed onto the female screw. Then, the lock nut 28 may be screwed onto the height adjusting bolt 27 and the height adjusting bolt 27 may be fixed to the ring plate 11 by tightening the lock nut. The height adjusting bolts 27 are arranged at equal intervals in the circumferential direction of the ring plate 11 and are used for finely adjusting the horizontal accuracy and height position error of the upper end of the pile head 1A obtained by cutting. The Moreover, the height adjustment bolt 27 can easily adjust the height of the top plate 4 simply by placing the top plate 4 thereon. And since the height adjustment bolt 27 is being fixed to the ring plate 11, it is effective when the top plate 4 is large sized.

  Next, the utilization aspect of the pile head cap apparatus 10 shown by FIG. 3 is demonstrated easily.

  As shown in FIG. 1 and FIG. 2, the ring plate 11 is placed on the upper end of the pile head 1 </ b> A while the closing plate 5 of the pile head cap device 10 is dropped into the pile head 1 </ b> A exposed from the ground A. Place. Then, with the disc 12 removed, the hand is inserted from the inner opening 11a of the ring plate 11 and the tightening bolt 14 is turned, the tip of the tightening bolt 14 is pressed against the inner wall surface of the pile head 1A, and the ring plate 11 is attached to the pile. Fix to head 1A.

  Thereafter, the disc 12 is placed on the horizontal support piece 13 a of the bracket 13 so as to cover the inner opening 11 a of the ring plate 11. Then, in order to install the centering rod 16 at a previously measured position, the centering rod 16 is moved along the long hole 12a while rotating the disc 12 in the horizontal plane, and the centering rod 16 is moved to the planned position. When 16 comes, the nut 18 is tightened and the centering rod 16 is fixed. Thereafter, marking is performed so as to straddle the ring plate 11 and the disc 12. As a result, even if the centering rod adjusting means 20 in which the centering rod 16 or the like is set on the disc 12 is removed from the ring plate 11, the disc 12 can be aligned with the ring plate 11, and the disc 12 is removed. Later it becomes possible to fill with mortar or concrete M2. Further, the holding plate 21 is rotated to the top of the disc 12 around the bolt 22, and then the disc 12 is fixed to the ring plate 11 by tightening the bolt 22. And while turning the three height adjustment bolts 27, the upper end of each height adjustment bolt 27 is set to the height position measured beforehand. Thereby, the setting of the pile head cap device 10 with respect to the pile head 1A is completed, and then the top plate 4 is placed on the upper end of each height adjustment bolt 27.

  Thus, after the setting of the pile head cap device 10 with respect to the pile head 1A is completed, the filler M2 made of mortar or concrete is injected from the inner opening 11a of the ring plate 11 to fill the inside of the pile head 1A. Filled with the material M2, the filler M1 is injected from above through the filling hole 4a of the top plate 4 between the sheath tube 7 and the pile head 1A.

  As shown in FIGS. 1, 2, 9 and 10, the centering rod 16 includes a shaft portion 16b extending in the vertical direction, a head portion 16a formed at the lower end of the shaft portion 16b, and a shaft portion. The upper end of the straight portion 16d is formed of a male screw portion 16c formed on the lower end of the screw 16b for screwing the nut 18 and a straight portion 16d formed above the male screw portion 16c on the shaft portion 16b. In order to facilitate insertion, it has a truncated cone shape.

  A center hole 4c into which the straight portion 16d of the centering rod 16 is inserted from below is formed at the center of the top plate 4, and the cylindrical tube 30 is interposed between the centering rod 16 and the wall surface 4d forming the center hole 4c. Inserted. Further, a female screw portion 4e is formed on the wall surface 4d forming the center hole 4c, and a male screw portion 30a to be screwed to the female screw portion 4e is formed on the outer peripheral surface of the cylindrical tube 30. A nut 31 is screwed onto the male threaded portion 30 a of the cylindrical tube 30, the nut 31 is brought into contact with the upper surface of the top plate 4, and the straight portion of the centering rod 16 is inserted into the insertion hole 30 b of the cylindrical tube 30. 16d is inserted.

  By adopting the cylindrical tube 30, the center hole 4c can be set to an arbitrary size that facilitates the operation of inserting the centering rod 16 into the center hole 4c of the top plate 4 from below. The cylindrical tube 30 fills the space between the straight portion 16d of the centering rod 16 and the wall surface 4d of the center hole 4c, so that the backlash of the top plate 4 with respect to the straight portion 16d of the centering rod 16 is extremely reduced. It can also be used. In particular, when the cylindrical sheath tube 7 shaped to surround the pile head 1A is fixed to the top plate 4, it becomes impossible to look into the center hole of the pile head plate from below, Although it is very difficult to insert the straight portion 16d of the centering rod 16 into the center hole 4c of the plate 4, the center hole 4c can be enlarged by adopting the cylindrical tube 30 even in such a case. The straight portion 16 d of the centering rod 16 can be easily inserted into the center hole 4 c of the plate 4 by visual inspection from the top of the top plate 4. That is, by adopting the cylindrical tube 30, the size of the center hole 4c can be set in advance to an arbitrary size according to the size of the top plate 4, so that the straight portion of the centering rod 16 The workability of inserting 16d into the center hole 4c of the top plate 4 from below is extremely good.

  Further, the wall surface 4d that forms the center hole 4c is formed with a female screw portion 4e, and the outer peripheral surface of the cylindrical tube 30 is formed with a male screw portion 30a that is screwed to the female screw portion 4e. The cylindrical tube 30 can be easily fixed to the top plate 4. In addition, the protruding amount of the cylindrical tube 30 with respect to the top plate 4 can be easily adjusted. By mounting the base plate 3 of the steel column 2 on the upper end of the cylindrical tube 30, the cylindrical tube 30 functions as a spacer, and the base plate 3 And the top plate 4 can be surely created, and the mortar or concrete M3 can be reliably filled between the top plate 4 and the base plate 3.

  Further, a nut 31 is screwed onto the male threaded portion 30 a of the cylindrical tube 30, and this nut 31 is brought into contact with the upper surface of the top plate 4, so that the protruding amount of the cylindrical tube 30 with respect to the top plate 4 is reliably maintained. be able to.

(Modification 1)
As shown in FIG. 11, the other centering rod 36 is formed over the entire length of the shaft portion 36b extending in the vertical direction, the head portion 36a formed at the lower end of the shaft portion 36b, and the shaft portion 36b. And a male thread portion 36c for screwing the nut 18 therethrough. On the inner peripheral surface of the cylindrical tube 30A, a female screw portion 30Ab that is screwed to the male screw portion 36c of the centering rod 36 is formed. It is formed as. A male screw portion 30Aa is formed on the outer peripheral surface of the cylindrical tube 30A, and a nut 31 to be brought into contact with the upper surface of the top plate 4A is screwed to the male screw portion 30Aa of the cylindrical tube 30A.

  When such a configuration is employed, the cylindrical tube 30A can be easily fixed to the top plate 4A. Moreover, the protruding amount of the cylindrical tube 30A with respect to the top plate 4A can be easily adjusted, and by placing the base plate 3 of the steel column 2 on the upper end of the cylindrical tube 30A, the cylindrical tube 30A functions as a spacer, and the base plate 3 And the top plate 4A can be surely created, and the mortar or concrete M3 can be reliably filled between the top plate 4A and the base plate 3. Further, by tightening the nut 31, the protruding amount of the cylindrical tube 30A with respect to the top plate 4A can be reliably maintained. Moreover, it is possible to appropriately prevent rotation in the horizontal plane of the top plate 4A and prevent vertical lifting.

(Modification 2)
As shown in FIGS. 12 to 14, the centering rod horizontal position adjusting means 40 in the other pile head cap device 47 is configured such that the centering rod 16 is inserted into the inner opening 41 a of the ring plate 41 in a horizontal state. The centering rod 16 is fixed to a slide portion 42 that sandwiches the ring plate 41 vertically. The slide portion 42 abuts the lower surface of the ring plate 41, the lower slide plate 43 through which the shaft portion 16 b of the centering rod 16 penetrates, and the upper surface of the ring plate 41 and the shaft portion 16 b of the centering rod 16. Through the upper slide plate 44, the head portion 16a of the centering rod 16 that contacts the lower surface of the lower slide plate 43, and the male screw of the shaft portion 16b of the centering rod 16 that contacts the upper surface of the upper slide plate 44. And a nut 18 screwed into the portion 16c.

  The upper slide plate 44 and the lower slide plate 43 having the same shape are substantially rectangular. By loosening the nut 18, the upper and lower slide plates 44, 43 can be freely slid along the plane of the ring plate 41 with respect to the level of the ring plate 41. Can be freely moved within the inner opening 41a. Since the upper and lower slide plates 44 and 43 are pressed against the ring plate 41 by the tightening operation of the nut 18, the centering rod 16 can be easily and reliably fixed at an arbitrary position.

  A bracket 45 extending in the vertical direction is fixed to the rear surface of the ring plate 41 by welding, and a fastening bolt 14 is screwed to the bracket 45 in the horizontal direction. The tightening bolt 14 can be turned by inserting a hand from the inner opening 41a with the upper and lower slide plates 44, 43 removed from the ring plate 41, and the ring plate 41 is placed on the upper end of the pile head 1A. Thus, the ring plate 41 can be fixed to the pile head 1A by pressing the tip of the tightening bolt 14 against the inner wall surface of the pile head 1A.

(Modification 3)
As shown in FIG. 28, the centering rod 37 includes a shaft portion 37b extending in the vertical direction, a head portion 16a formed at the lower end of the shaft portion 37b, and a nut 18 formed at the lower end of the shaft portion 37b. A male screw part 16c for screwing, a straight part 37d formed above the male screw part 16c on the shaft part 37b, and a male screw part 37e formed so as to protrude from the upper end of the shaft part 37b, It consists of.

  A center hole 4c into which the straight portion 37d of the centering rod 37 is inserted from below is formed at the center of the top plate 4, and the cylindrical tube 30 is interposed between the centering rod 37 and the wall surface 4d forming the center hole 4c. Inserted. Further, a female screw portion 4e is formed on the wall surface 4d forming the center hole 4c, and a male screw portion 30a to be screwed to the female screw portion 4e is formed on the outer peripheral surface of the cylindrical tube 30. A nut 31 is screwed onto the male threaded portion 30 a of the cylindrical tube 30, the nut 31 is brought into contact with the upper surface of the top plate 4, and the straight portion of the centering rod 37 is inserted into the insertion hole 30 b of the cylindrical tube 30. 37d is inserted.

  In the insertion hole 30 b extending in the vertical direction at the center of the cylindrical tube 30, a female screw to be screwed into a shaft portion 37 b of the centering rod 37 and a male screw portion 37 e formed at the upper end of the centering rod 37. A centering rod extension bolt 38 having a portion 38a formed at the lower end is inserted. The male threaded portion 38b of the centering rod extension bolt 38 protrudes upward from the cylindrical tube 30, and the nut 39 is pressed against the male threaded portion 38b of the centering rod extension bolt 38 in contact with the upper surface 38c of the cylindrical tube 37. Is screwed. When such a configuration is adopted, the collimation of the centering rod extension bolt 38 and the nut 39 allows the filler (mortar or concrete) M1 filled between the sheath tube 7 and the pile 1 to be cured until it hardens. It is possible to appropriately prevent rotation in the horizontal plane of the plate 4 and prevent vertical lifting. The centering rod extension bolt 38 and the nut 39 are removed after the filler M1 is cured.

  The present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the gist of the present invention.

  As shown in FIGS. 15 to 17, in another pile head cap device 70, a height adjusting bolt 27 </ b> A protruding upward is attached to the disk 12 </ b> A. The height adjusting bolt 27A used for placing the top plate 4 penetrates the disc 12A and is screwed to a nut 28A fixed to the disc 12A by welding. A lock nut (not shown) may be further disposed on the nut 28A. Note that a female screw may be formed on the disk 12A, and the height adjusting bolt 27 may be screwed onto the female screw. Then, the lock nut 28A may be screwed onto the height adjustment bolt 27A, and the height adjustment bolt 27A may be fixed to the ring plate 11 by tightening the lock nut. Therefore, the amount of protrusion of the height adjusting bolt 27A can be adjusted steplessly by turning the height adjusting bolt 27A. Then, by screwing the nut 28A onto the height adjusting bolt 27A, the protruding amount can be reliably maintained. Since the height adjustment bolt 27A is fixed to the disc 12A, it is effective when the top plate 4 is small.

  Furthermore, U-shaped brackets 13 </ b> A arranged at equal intervals by welding are fixed to the back surface of the ring plate 11. Each bracket 13A includes a horizontal support piece 13Aa for supporting the disk 12A, a vertical piece 13Ab to which the fastening bolt 14 is screwed in the horizontal direction, and a suspension piece 13Ac to which the upper end of the suspension rod 23 is fixed. Has been. With this configuration, the structure can be simplified.

  As shown in FIGS. 18 to 22, in another pile head cap device 80, an annular horizontal support piece 50 is fixed to the back surface of the ring plate 11 by welding. The disc 12 is placed on the inner periphery of the horizontal support piece 50 by projecting into the inner opening 11 a of the ring plate 11. When such a horizontal support piece 50 is employed, even if a strong force is applied to the disc 12 from above, a strength that prevents the disc 12 from falling can be obtained. A bracket 51 extending in the vertical direction is fixed to the back surface of the ring plate 11 by welding, and a fastening bolt 14 is screwed to the bracket 51 in the horizontal direction.

  As shown in FIGS. 23 to 27, in another pile head cap device 90, a large ring-shaped horizontal support piece 60 is fixed to the back surface of the ring plate 11, and the ring plate 11 is supported by the horizontal support piece 60. Can be reinforced well. The disc 12 is placed by the inner periphery of the horizontal support piece 60 protruding into the inner opening 11 a of the ring plate 11.

  A bracket 51 extending in the vertical direction is fixed to the horizontal support piece 60 by welding, and a fastening bolt 14 is screwed to the bracket 51 in the horizontal direction. The horizontal support piece 60 is penetrated by the height adjusting bolt 27 and the bolt 22 that forms the rotation center of the pressing plate 21. The horizontal support piece 60 may be fixed to the back surface of the ring plate 11 by welding, but the ring plate 11 and the horizontal support piece 60 are secured by a pair of nuts 24a and 24b screwed to the upper end of the suspension rod 23. , The horizontal support piece 60 can be fixed to the ring plate 11 without welding.

As shown in FIGS. 29 and 30, in another pile head cap device 100, a ring-shaped support plate 101 is disposed between the ring plate 11 and the upper end of the pile head 1 </ b> A, and the outer periphery of the support plate 101. An end is arrange | positioned at the upper end of 1 A of pile heads, and the inner peripheral end of the support plate 101 protrudes inward from the inner side opening part 11a of the ring plate 11, and is supporting the disk 12 from the bottom. If such a structure is adopted, the vertical load transmitted to the disk 12 via the mortar or concrete between the top plate and the disk is reliably transmitted to the pile head 1A via the support plate 101 without the welded portion. Therefore, deformation of the pile head cap device 100 can be appropriately prevented. And the pile head cap 100 can be arrange | positioned on the pile head 1A without welding.
The height adjustment bolts 27 and the bolts 22 may be screwed to the female screws provided on the support plate 101 instead of the female screws provided on the ring plate 11. Further, the hanging rod 23 may be fixed to the support plate 101 instead of the ring plate 11.

  As shown in FIGS. 31 and 32, another pile head cap device 110 includes a ring-shaped support plate 112 on which an outer peripheral end is placed on the upper end of the pile head 1A, and an inner opening 112a of the support plate 112. A disc 12 disposed on the upper surface of the support plate 112 so as to close, and a locking piece 111 that protrudes from the upper surface of the support plate 112 and abuts on the outer peripheral edge of the disc 12 and restricts the horizontal movement of the disc 12. And a centering rod horizontal position adjusting means 20 that has the disc 12 and makes the centering rod 36 movable in the horizontal direction. In addition, each locking piece 111 is fixed to the support plate 112 by welding, and is arrange | positioned at equal intervals around the inner side opening part 112a. If such a structure is employ | adopted, the vertical load transmitted to the disk 12 via the mortar or concrete between a top plate and a disk will be applied to the pile head 1A via the support plate 112, not via a welding part. Accordingly, the pile head cap device 110 can be appropriately prevented from being deformed. And the pile head cap 110 can be arrange | positioned on the pile head 1A without welding.

  A: Ground, M1, M2, M3, M4 ... Filler (mortar or concrete), 1 ... Steel pipe pile (pile), 1A ... Pile head, 2 ... Superstructure, 4, 4A ... Top plate, 4c, 4Ac ... Center hole, 4d, 4Ad ... Wall surface of center hole, 4e, 30Ab ... Female thread part, 5 ... Closing plate, 7 ... Sheath tube, 10, 47, 70, 80, 90, 100, 110 ... Pile head cap device, 11 , 41 ... Ring plate, 11a, 41a ... Inside opening, 12, 12A ... Disc, 12a ... Long hole, 13a, 13Aa, 50, 60 ... Horizontal support piece, 17, 42 ... Slide part, 16, 36, 37 ... Centering rod, 16a, 36a ... Centering rod head, 18 ... Nut, 20, 40 ... Centering rod horizontal position adjusting means, 23 ... Hanging rod, 27, 27A ... Height adjusting bolt, 30a, 30Aa , 36c ... male screw part, 30, 3 A ... Cylindrical tube, 31 ... Nut, 38 ... Centering rod extension bolt, 39 ... Nut, 43 ... Lower slide plate, 44 ... Upper slide plate, 101, 112 ... Support plate, 112a ... Inner opening, 111 ... Locking Piece.

Claims (13)

Hollow piles erected on the ground,
A sheath tube that is disposed around the pile head of the pile that is exposed from the ground, and a top plate is fixed to the upper end;
A filler made of mortar or concrete filled between the sheath tube and the pile;
An upper structure fixed to the top plate;
A centering rod inserted from below into a center hole formed in the center of the top plate,
Pile head cap device provided with the centering rod extending in the vertical direction,
A ring plate fixed horizontally to the pile head so as to close the upper end of the pile head;
Centering bar horizontal position adjusting means for allowing the centering bar to move only in the horizontal direction with reference to the level of the ring plate within the inner opening formed in the ring plate;
A bracket fixed to the back surface of the ring plate;
A fastening bolt screwed to the bracket,
The ring plate is fixed to the pile head by pressing the tightening bolt against the inner wall surface of the pile head . The centering bar horizontal position adjusting means includes:
A disc horizontally supported by the ring plate and fitted into the circular inner opening;
An elongated hole extending in the radial direction of the disc and through which the centering rod passes;
The joint structure of a pile and an upper structure according to claim 1, further comprising: a slide portion attached to the centering rod so as to sandwich the disc vertically.   A ring-shaped support plate is disposed between the ring plate and the upper end of the pile head, the outer peripheral end of the support plate is disposed at the upper end of the pile head, and the inner peripheral end of the support plate is The joint structure of a pile and an upper structure according to claim 2, wherein the disk is supported from below by projecting inward from an inner opening of the ring plate.   The slide portion includes a head portion of the centering rod that contacts the lower surface of the disc, and a nut portion that contacts the upper surface of the disc and is screwed to the shaft portion of the centering rod. The joint structure of the pile according to claim 2 or 3 and the superstructure. The centering bar horizontal position adjusting means includes:
The pile and superstructure according to claim 1, wherein the centering rod is inserted into the inner opening of the ring plate, and the centering rod is attached to a slide portion that sandwiches the ring plate vertically. Bonding structure with objects. The slide part is
A lower slide plate that abuts the lower surface of the ring plate and through which the shaft portion of the centering rod passes;
An upper slide plate that abuts the upper surface of the ring plate and through which the shaft portion of the centering rod passes;
A head portion of the centering rod that contacts the lower surface of the lower slide plate;
The pile and the upper structure according to claim 5, wherein the pile and the upper structure are configured by a nut portion that abuts on an upper surface of the upper slide plate and is screwed to the shaft portion of the centering rod. Junction structure.   The upper end of a hanging rod extending in a vertical direction is fixed to the ring plate, and a closing plate disposed in the pile is fixed to the lower end of the hanging rod. Claim | item 1-6 joining structure of the pile and superstructure as described in any one.   The joint structure of a pile and an upper structure according to any one of claims 1 to 7, wherein a height adjusting bolt protruding upward is attached to the ring plate.   The joint structure of a pile and an upper structure according to any one of claims 2 to 4, wherein a height adjusting bolt protruding upward is attached to the disc. Hollow piles erected on the ground,
A sheath tube that is disposed around the pile head of the pile that is exposed from the ground, and a top plate is fixed to the upper end;
A filler made of mortar or concrete filled between the sheath tube and the pile;
An upper structure fixed to the top plate;
A centering rod inserted from below into a center hole formed in the center of the top plate,
Pile head cap device provided with the centering rod extending in the vertical direction,
A ring-shaped support plate on which an outer peripheral end is placed on the upper end of the pile head;
A disc disposed on the upper surface of the support plate so as to close the inner opening of the support plate;
A locking piece that protrudes from the upper surface of the support plate and restricts the horizontal movement of the outer peripheral edge of the disc;
A joining structure of a pile and an upper structure, comprising: the disk, and a centering bar horizontal position adjusting unit that allows the centering bar to move in a horizontal direction. The upper end of a hanging rod extending in a vertical direction is fixed to the support plate, and a closing plate disposed in the pile is fixed to the lower end of the hanging rod. Item 11. A joint structure of the pile according to any one of Items 3 and 10 and the upper structure. The joint structure of a pile and an upper structure according to any one of claims 3 , 10 , and 11, wherein a height adjusting bolt protruding upward is attached to the support plate.   Hollow piles erected on the ground,
  A sheath tube that is disposed around the pile head of the pile that is exposed from the ground, and a top plate is fixed to the upper end;
  A filler made of mortar or concrete filled between the sheath tube and the pile;
  An upper structure fixed to the top plate;
  A centering rod inserted from below into a center hole formed in the center of the top plate,
  Pile head cap device provided with the centering rod extending in the vertical direction,
  A ring plate fixed horizontally to the pile head so as to close the upper end of the pile head;
  Centering bar horizontal position adjusting means for allowing the centering bar to move only in the horizontal direction with reference to the level of the ring plate within the inner opening formed in the ring plate, and
  The centering bar horizontal position adjusting means includes:
  A disc horizontally supported by the ring plate and fitted into the circular inner opening;
  An elongated hole extending in the radial direction of the disc and through which the centering rod passes;
  A slide portion attached to the centering rod so as to sandwich the disk up and down,
  A ring-shaped support plate is disposed between the ring plate and the upper end of the pile head, the outer peripheral end of the support plate is disposed at the upper end of the pile head, and the inner peripheral end of the support plate is A joint structure between a pile and an upper structure, wherein the disk is supported from below by projecting inward from an inner opening of the ring plate.

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