JP2009144347A - Supporting structure of pile and superstructure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a structure capable of fitting a lower part of a pile head cap into both end parts of a pile, moving and tilting the lower part of the pile head cap in every direction for an upper end opening of the pile for installation by making an upper face of the pile head cap horizontal, and preventing the pile head cap from coming off the pile. <P>SOLUTION: This supporting structure of the pile 10 and the superstructure is constituted by fitting the lower part of the pile head cap 20 having a conical or truncated cone or partial spherical shape into an upper end part of the tubular pile 10 and supporting the superstructure on the upper face of the pile head cap 20. A nonslip member 23 is suspended from the lower part having the conical or truncated cone or partial spherical shape of the pile head cap 20. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a support structure for a pile and a superstructure.

  Conventionally, as a structure for supporting an upper structure such as a building on a pile, as described in Patent Document 1, a pile head having a lower end in a conical shape, a truncated cone shape, or a partial spherical shape at the upper end portion of a tubular pile It has been proposed that the lower part of the cap is fitted and fixed, and the upper structure is supported on the upper surface of the pile head cap.

In Patent Document 1, when the lower portion of the pile head cap is fitted into the upper end portion of the pile, the lower portion of the pile head cap is tilted in all directions while maintaining the overall contact with the peripheral edge portion of the upper end opening of the pile. Therefore, even if the pile is inclined, the upper surface of the pile head cap can be installed to be horizontal. When the upper surface of the pile head cap becomes horizontal, the pile head cap and the pile are welded, and the upper structure is supported on the upper surface of the pile head cap.
JP2006-132174

  However, in patent document 1, there exists a possibility that a pile head cap may float with respect to a pile by the effect | action of an excessive horizontal force, or it may slip | deviate from a pile by horizontal displacement in the step before welding a pile head cap and a pile.

  The lower part of the pile head cap is fitted into the upper end of the pile, and the lower part of the pile head cap can be tilted in all directions with respect to the upper end opening of the column. The head cap and the pile can be joined without being welded (pin joint) so that they can be tilted freely, and the upper structure can be supported on the upper surface of the pile head cap. According to this, at the time of an earthquake etc., a building and a pile head cap can be tilted freely with respect to a pile, and the moment which acts on a pile or a building can be reduced.

  However, when the building and the pile head cap are pin-jointed to the pile in this way, the building and the pile head cap are only fixed on the pile and are not fixed. If an excessive horizontal force acts on the building, the pile head cap may float on the pile, or it may be displaced horizontally and fall off the pile.

  The subject of the present invention is to install the lower part of the pile head cap into the upper end of the pile, and to make the lower part of the pile head cap tiltable in all directions with respect to the upper end opening of the pile so that the upper surface of the pile head cap is horizontal. In the structure to enable, it is in preventing the drop of the pile head cap from a pile.

  In the invention of claim 1, the lower part of a pile head cap having a conical shape, a truncated cone shape, or a partial spherical shape is fitted into the upper end portion of the tubular pile, and the upper structure is formed on the upper surface of the pile head cap. A support structure for a pile to be supported and an upper structure, in which a retaining member is suspended from a conical shape, a truncated cone shape, or a partial spherical shape of a pile head cap.

  According to a second aspect of the present invention, in the first aspect of the present invention, the retaining member is a steel pipe welded to a conical shape, a truncated cone shape, or a partially spherical shape of a pile head cap. It is.

  According to a third aspect of the present invention, in the first or second aspect of the present invention, the retaining member includes a retaining locking portion, and the retaining member is inserted into the inner hole of the pile. When the retaining member is disposed below the stopper provided on the inner periphery of the pile and the retaining member is displaced upward from the inner hole of the pile, the retaining locking portion is disposed on the stopper provided on the inner periphery of the pile from below. It is intended to be locked.

(Claim 1)
(a) A retaining member was suspended from the lower part of the pile head cap having a conical shape, a truncated cone shape, or a partially spherical shape. Therefore, when installing the pile head cap so that the lower part of the pile head cap is fitted in the upper end of the pile, the lower part of the pile head cap can be tilted in all directions with respect to the upper end opening of the pile, and the upper surface of the pile head cap is installed horizontally. Or, after the construction where the upper structure is supported on the top surface of this pile head cap, even if the pile head cap is lifted or deviated from the pile due to excessive horizontal force, the bottom of the pile head cap is prevented from coming off. The member hits the inner periphery of the pile, and the falling off of the pile head cap from the pile can be easily and reliably prevented.

(Claim 2)
(b) The retaining member is simply formed by a steel pipe welded to the lower part of the pile head cap having a conical shape, a truncated cone shape, or a partially spherical shape of the pile head cap.

(Claim 3)
(c) When the retaining member of the retaining member is disposed below the stopper provided on the inner periphery of the pile and the retaining member is displaced upward from the inner hole of the pile, the retaining member is Is locked from below to the stopper provided on the inner periphery of the pile. Therefore, the retaining member and the retaining locking portion can more reliably prevent the pile head cap from falling off the pile while allowing the pile head cap to move with respect to the pile.

  Fig. 1 is a schematic diagram showing the first half of the joining procedure of the pile and the upper structure, Fig. 2 is a schematic diagram showing the latter half of the joining procedure of the pile and the upper structure, and Fig. 3 is a sectional view showing the pile and the pile head cap. 4 is an enlarged cross-sectional view showing a pile, a pile head cap, and a reinforcing ring, FIG. 5 is a cross-sectional view showing the pile head cap, FIG. 6 is a schematic view showing a variation of the pile head cap, and FIG. 7 is a pile head cap. FIG. 8 is a schematic diagram showing a modification of the pile head cap, FIG. 9 is a schematic diagram showing a modification of the pile head cap, and FIG. 10 is a schematic diagram showing a modification of the pile head cap. is there.

  In FIG. 1 to FIG. 3, a pile head cap 20 is fixed to the upper end portion of the steel pipe pile 10, and a vertical section E-type joint tool 30 in which an H-shaped steel is horizontally placed on the upper surface of the pile head cap 20 is mounted. The lower plate 32 of one of the two upper and lower parallel plates 31 and 32 of the connector 30 is fixed to the upper surface of the pile head cap 20 by four bolts 40, and is attached to the upper surface of the upper plate 32 of the connector 30. A building unit A as an upper structure is fixed by one bolt 50. The joining tool 30 is an H-shaped steel having upper and lower flanges 31 and 32 that are two parallel plates and a web 33 that is the remaining one plate.

  The pile head cap 20 is configured by welding a square lid plate 22 to the upper end surface of the cap body 21. The cap body 21 constitutes the lower part of the pile head cap 20 and has a truncated cone shape. The pile head cap 20 has the truncated cone surface of the cap body 21 as the inner hole of the pile 10 while fitting up to about the middle part in the height direction of the truncated cone-shaped cap body 21 in the inner hole of the upper end portion of the pile 10. The lid plate 22 is adjusted to be horizontal regardless of the inclination of the pile core of the pile 10 by slidingly moving with respect to the end face. Four bolt holes for bolts 40 are formed in the lid plate 22 in advance.

  As shown in FIGS. 3 and 5, the pile head cap 20 has a retaining member 23 suspended below the cap body 21. The retaining member 23 is formed of a steel pipe welded to the lower end side of the truncated cone surface of the cap body 21. When the cap main body 21 of the pile head cap 20 is fitted into the inner hole of the upper end portion of the pile 10, the retaining member 23 is inserted into the inner hole of the pile 10.

  Therefore, the joining procedure of the building unit A is as follows (FIGS. 1 to 4). 3 and 4 show the material and dimensions (unit: mm) of the cap body 21, the cover plate 22, the retaining member 23, and the reinforcing metal 60 described later.

(1) Pile 10 placement and pile head treatment (Fig. 1 (A))
The pile 10 is driven on the ground 100, and the pile head is aligned with the predetermined height (h) from the ground 100.
As shown in FIGS. 3 and 4, a reinforcing metal 60 can be attached around the outer periphery of the upper end of the pile 10. The reinforcing metal 60 has a tapered inner periphery 61 that expands downward, and this tapered inner periphery 61 is seated on the upper end outer peripheral edge of the pile 10. After the cap body 21 of the pile head cap 20 is fitted into the inner hole at the upper end of the pile 10, the reinforcing metal 60 is arranged so that the upper end opening of the pile 10 does not open and deform when supporting the load of the building unit A. Tighten the outer circumference of the top of the.

(2) Pile position measurement (Fig. 1 (B))
The horizontal position (x) and inclination (θ) of the pile core of the pile 10 are measured.

(3) Attaching the pile head cap 20 (FIG. 1C)
The upper end of the pile 10 is fitted into the inner hole of the pile head cap 20 up to about the middle part in the height direction of the truncated cone, and the retaining member 23 is inserted into the inner hole of the pile 10. The frustoconical surface is slid relative to the end face of the inner hole of the pile 10 so that the cover plate 22 is adjusted to be horizontal regardless of the inclination of the pile core of the pile 10. The cover plate 22 of the pile head cap 20 is previously drilled with four bolt holes for the bolts 40.

(4) Processing of connector 30 (FIG. 2 (A))
Four bolt holes 40A for bolts 40 to be joined to the cover plate 22 of the pile head cap 20 are drilled in the lower flange 32 of the joint tool 30 at the site construction. In addition, the upper flange 31 of the connector 30 is previously drilled with one bolt hole 50A for the bolt 50.

(5) Attaching the connector 30 (FIG. 2 (B))
The lower flange 32 of the connector 30 is placed on the cover plate 22 of the pile head cap 20 and fixed with the bolts 40. When there is variation in the height of the upper end portion of the pile 10, by placing a lower flange 32 of the connector 30 on this liner via a height adjusting liner on the cover plate 22 of the pile head cap 20, Absorbs variations in the height of the upper end of the pile 10.

(6) Installation of building unit A (Fig. 2 (C))
The pillar 1 of the building unit A is placed on the upper flange 31 of the joint 30, the lower piece of the joint piece 2 attached to the pillar 1, and the lower piece of the floor beam 3 superimposed on the lower piece of the joint piece 2. Is fixed to the upper flange 31 with a bolt 50.

  By fixing the building unit A to the pile 10 using the pile head cap 20, the joint tool 30, and the bolts 40, 50 without using concrete, the construction period can be shortened without waiting for the concrete to solidify. Even if the equal settlement phenomenon occurs, the unevenness can be easily corrected by removing the bolt 50.

  In this embodiment, after the cap body 21 of the pile head cap 20 is fitted into the upper end portion of the pile 10 in the above (3) and the cover plate 22 of the pile head cap 20 is installed horizontally, the pile head cap 20 and The pile 10 was joined so as to be able to tilt freely without welding (pin joint), and the building unit A was supported on the lid plate 22 of the pile head cap 20 via the joint 30. Therefore, the building unit A and the pile head cap 20 can be freely tilted with respect to the pile 10 during an earthquake or the like, and the moment acting on the pile 10 or the building unit A can be reduced.

  The pile head cap 20 of FIG. 6 has a cap body 21 having a conical shape, and a retaining member 23 made of a steel pipe is welded to the lower portion of the cap body 21. The pile head cap 20 is fitted into the inner hole at the upper end of the pile 10 up to about the middle part in the height direction of the conical cap body 21, and the retaining member 23 is inserted into the inner hole of the pile 10. The cover plate 22 is adjusted to be horizontal regardless of the inclination of the pile core of the pile 10 by sliding the conical surface of the cap body 21 relative to the end face of the inner hole of the pile 10.

  The pile head cap 20 shown in FIG. 7 has a cap body 21 having a partially spherical shape, and a retaining member 23 made of a steel pipe is welded to the lower portion of the cap body 21. The pile head cap 20 is fitted into the inner hole at the upper end of the pile 10 up to about the middle part in the height direction of the spherical cap body 21, and the retaining member 23 is inserted into the inner hole of the pile 10. The spherical surface of the cap body 21 is slid relative to the end face of the inner hole of the pile 10 so that the cover plate 22 is adjusted to be horizontal regardless of the inclination of the pile core of the pile 10.

According to the present embodiment, the following operational effects can be obtained.
(a) The retaining member 23 is suspended from the lower part of the pile head cap 20 having a conical shape, a truncated cone shape, or a partially spherical shape. Accordingly, the lower portion of the pile head cap 20 is fitted into the upper end portion of the pile 10 so that the lower portion of the pile head cap 20 can be tilted in all directions with respect to the upper end opening of the pile 10 so that the upper surface of the pile head cap 20 is horizontal. Even if the pile head cap 20 is lifted with respect to the pile 10 due to the action of an excessive horizontal force after installation or after the construction in which the upper structure is supported on the upper surface of the pile head cap 20, The retaining member 23 at the lower part of the pile head cap 20 hits the inner periphery of the pile 10 and can prevent the pile head cap 20 from falling off the pile 10 easily and reliably.

  (b) The retaining member 23 is simply formed by a steel pipe welded to the lower portion of the pile head cap 20 having a conical shape, a truncated cone shape, or a partially spherical shape.

  The pile head cap 20 of FIG. 8 hangs down by welding a connecting body 23C made of a hollow rod to the center of an end plate 23B in which a retaining member 23 is welded to the lower end of the steel pipe 23A, and the lower end of the connecting body 23C. The retaining locking portion 24 is provided by welding. In a state where the retaining member 23 is inserted into the inner hole of the pile 10, the retaining locking portion 24 is disposed separately below the stopper portion 11 provided on the inner periphery of the pile 10. When the retaining member 23 is displaced upward from the inner hole of the pile 10, the retaining locking portion 24 is locked from below to the stopper portion 11 provided on the inner periphery of the pile 10. When the stopper portion 11 is made of an annular plate welded to the inner periphery of the pile 10, the retaining stopper 24 can be made of a rod-like material that is longer than the center hole diameter of the stopper portion 11. The stopper portion 11 may be made of a rod-like material, and the retaining stopper 24 may be made of a disc.

  The pile head cap 20 of FIG. 9 differs from the pile head cap 20 of FIG. 8 in that a connecting body 23C made of a taper pipe is welded to the steel pipe 23A of the retaining member 23 and suspended, and is attached to the lower end portion of the connecting body 23C. The retaining locking portion 24 is provided by welding.

  The pile head cap 20 of FIG. 10 differs from the pile head cap 20 of FIG. 8 in that a retaining member 23 made of a bar material is welded to the center of the end plate 21A of the cap body 21 to hang down. A retaining stopper 24 is provided at the lower end of 23 by welding.

  According to the pile head cap 20 of FIGS. 8 to 10, the retaining member 23 and the retaining locking portion 24 can be moved from the pile 10 of the pile head cap 20 while allowing the movement of the pile head cap 20 with respect to the pile 10. Can be more reliably prevented.

  Although the embodiments of the present invention have been described in detail with reference to the drawings, the specific configuration of the present invention is not limited to these embodiments, and even if there is a design change or the like without departing from the gist of the present invention. It is included in the present invention. For example, when the cover plate 22 of the pile head cap 20 becomes horizontal in the above (3), the truncated cone surface (conical surface or spherical surface) of the cap body 21 may be welded to the outer periphery of the upper end of the pile 10. .

Drawing 1 is a mimetic diagram showing the first half process of the joining procedure of a pile and a superstructure. FIG. 2 is a schematic diagram showing the latter half of the procedure for joining the pile and the upper structure. FIG. 3 is a cross-sectional view showing a pile and a pile head cap. FIG. 4 is an enlarged sectional view showing a pile, a pile head cap, and a reinforcing ring. FIG. 5 is a cross-sectional view showing a pile head cap. FIG. 6 is a schematic view showing a modification of the pile head cap. FIG. 7 is a schematic view showing a modification of the pile head cap. FIG. 8 is a schematic view showing a modification of the pile head cap. FIG. 9 is a schematic diagram showing a variation of the pile head cap. FIG. 10 is a schematic view showing a modification of the pile head cap.

Explanation of symbols

10 Pile 20 Pile Head Cap 23 Retaining Member 24 Retaining Locking Section

Claims (3)

A pile and an upper structure in which a lower part of a pile head cap having a conical shape, a truncated cone shape, or a partial spherical shape is fitted to an upper end portion of a tubular pile, and an upper structure is supported on an upper surface of the pile head cap A support structure for the object,
A support structure for a pile and an upper structure in which a retaining member is suspended from a lower part of a conical shape, a truncated cone shape, or a partial spherical shape of a pile head cap.   The support structure for a pile and an upper structure according to claim 1, wherein the retaining member is a steel pipe welded to a lower part of a pile head cap having a conical shape, a truncated cone shape, or a partially spherical shape. The retaining member includes a retaining locking portion;
In a state where the retaining member is inserted into the inner hole of the pile, the retaining latching portion is disposed below the stopper portion provided on the inner periphery of the pile,
3. The pile and the upper structure according to claim 1, wherein when the retaining member is displaced upward from the inner hole of the pile, the retaining latching portion is latched from below to a stopper portion provided on the inner periphery of the pile. Support structure.

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