JP2008057139A - Structure for joining pile and upper structure together - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To easily absorb the displacement of the center of a pile, caused by the accuracy of the construction of the pile, and enhance the workability of the fixation of an upper structure, when the pile and the upper structure are joined together by means of a joint device. <P>SOLUTION: A pile head cap 20 is fixed to an upper end of the pile 10 in such a manner as to cover it; the H-shaped longitudinal-section joint device 30 is horizontally placed on the top surface of the pile head cap 20; either of two parallel plates 31 and 32 of the joint device 30 is fixed onto the top surface of the pile head cap 20; and the upper structure A is fixed onto the top surface of the other one of the two parallel plates 31 and 32 of the joint device 30. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a joint structure between a pile and an upper structure.

  As a conventional joining structure of a pile and an upper structure, as described in Patent Document 1, a mounting base is welded to the upper end of the pile, and a column of a building unit as an upper structure is placed on the mounting base. However, there are some which bolt the joint piece attached to the column and the floor beam superimposed on the joint piece to the mounting base.

By fixing the superstructure to the pile using bolts and mounting bases without using concrete etc., it is not necessary to wait for the concrete to solidify, shortening the construction period, and even if uneven settlement occurs, the bolt There are merits such as being able to remove unevenness and easily correct unevenness.
JP-A-11-93273

  In the joint structure of the pile and the superstructure of Patent Document 1, the mounting base is welded directly to the upper end of the pile, and the mounting base absorbs the shift of the pile core due to the construction accuracy of the pile, and the upper end of the column. There is no consideration of being provided in the part.

  In addition, in the joint structure of the pile and the upper structure in Patent Document 1, the mounting base is provided with a reinforcing plate between the upper plate and the lower plate to increase the strength. Each of them is provided with a reinforcing plate to form a box. For this reason, both ends of the mounting base are blocked by the reinforcing plate, and it is difficult to put a hand on the back side of the upper plate, and the bolting workability of the upper structure is poor.

  An object of the present invention is to easily absorb the shift of the pile core due to the construction accuracy of the pile and improve the fixing workability of the upper structure when joining the pile and the upper structure using the joint tool. .

  In the invention of claim 1, a pile head cap is fixed on the upper end of the pile, and a vertical cross-section type connector is placed on the upper surface of the pile head cap, and two parallel pieces of the connector are parallel to each other. One plate is fixed to the upper surface of the pile head cap, and the upper structure is fixed to the other upper surface of the two parallel plates of the connector.

  According to a second aspect of the present invention, the flange of the two parallel plates and the web of the remaining one plate are reinforced with a stiffener in the first aspect of the invention. .

  According to a third aspect of the present invention, in the second aspect of the present invention, when the upper structure has a column, the stiffener is provided immediately below the contour portion of the column.

(Claim 1)
(a) A pile head cap was interposed between the upper end of the pile and the joint to which the superstructure was fixed. Therefore, when fixing the lower plate of the joint on the upper surface of the pile head cap fixed on the top of the pile at the site, the joint is placed in the horizontal direction of the pile core according to the pile construction accuracy with respect to the pile head cap. Can absorb and fix the displacement. The superstructure is simply fixed at the fixed position determined from the beginning on the upper plate of the joint, and is arranged at the initial planned installation position regardless of the horizontal displacement of the pile core.

  (b) The joint is formed in a vertical cross-sectional shape so that the strength is increased and the both ends are opened to the outside without being blocked. Therefore, when fixing the lower plate of the connector to the pile head cap or fixing the upper structure to the upper plate of the connector, it is easy to put a hand between the upper plate and the lower plate of the connector, and fixing work such as bolting Can be improved. Moreover, the H-shaped steel which is a general product can be utilized as a raw material of a connector, and cost can be reduced.

(Claim 2)
(c) The joint can be further strengthened by reinforcing the flange, which is two parallel plates, and the web, which is the remaining one plate, with a stiffener.

(Claim 3)
(d) When the stiffener of the joint has a column in the superstructure, the load of the superstructure is guided directly to the pile through the stiffener of the joint by being provided directly under the contour of the pillar. The support strength of the structure can be improved.

  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 diagram of the pile and the upper structure of Example 1. FIG. 4 is a side view of FIG. 3, FIG. 5A is a top view of FIG. 3, FIG. 5B is a bottom view of FIG. 3, and FIG. FIG. 7 is a side view of FIG. 6, (A) is a top view of FIG. 6, (B) is a bottom view of FIG. 6, and FIG. 9 is a pile of Example 3. FIG. 10 is a side view of FIG. 9, FIG. 11A is a top view of FIG. 9, FIG. 11B is a bottom view of FIG. 9, and FIG. FIG. 13 is a side view of FIG. 12, FIG. 14A is a top view of FIG. 12, FIG. 14B is a bottom view of FIG. 12, and FIG. Positive showing the joint structure of 5 piles and superstructure FIG, 16 is a side view of FIG. 15, (A) in FIG. 17 is a top view of FIG. 15 is a bottom view (B) in FIG. 15.

Example 1 (FIGS. 1 to 5)
The building unit A to which the present invention is applied is, as shown in FIGS. 3 to 5, groove-shaped steel joint pieces 2 are attached to the lower and upper ends of a pillar 1 made of steel square pipes at four corners by welding, A short groove-shaped steel floor beam 3 and a ceiling beam 4 (not shown) straddling between the joint pieces 2 between the upper and lower sides are attached by welding, and a long groove-shaped steel floor beam 5 and a ceiling beam 6 (not illustrated) (Shown) is attached by welding, and has a box-shaped structure in which the column 1 and the beams 3, 4, 5, and 6 are joined by a ramen structure. A plurality of wooden beams are bridged between two substantially parallel long ceiling beams 6 and 6 of this box-shaped structure, and a steel corner is provided between two substantially parallel long floor beams 5 and 5. A plurality of small beams made of pipes are bridged via a groove-shaped mounting piece to constitute a framework of the building unit A.

  A pile head cap 20 is put on and fixed to the upper end portion of the steel pipe pile 10, and a vertical section E-shaped joint tool 30 is placed on the upper surface of the pile head cap 20. The lower plate 32 of one of the upper and lower two parallel plates 31 and 32 is fixed to the upper surface of the pile head cap 20 by four bolts 42, and the upper structure 32 is attached to the upper surface of the upper plate 32 of the connector 30. Building unit A is fixed by one bolt 50.

  The pile head cap 20 is configured by welding a square lid plate 22 to the upper end surface of the short cylindrical tube 21, and is welded by fitting the inner periphery of the short cylindrical tube 21 to the upper end outer periphery of the pile 10. Four bolt holes for bolts 40 are formed in the lid plate 22 in advance.

  The connector 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 upper flange 31 is previously provided with one bolt hole 50A for the bolt 50. A bolt hole 40A for the bolt 40 of the lower flange 32 is installed on site. The connector 30 is reinforced by stiffeners 34 provided on both sides of the web 33 and orthogonal to the web 33. The stiffener 34 is butt welded to the web 33 and one or both of the upper flange 31 and the lower flange 32. At least a part of the stiffeners 34 of the connector 30 is provided at a position corresponding to a position immediately below the outline of the column 1 of the building unit A, in other words, directly below the plate thickness of the column 1.

  The pile 10, the pile head cap 20, and the connector 30 of Example 1 are provided below the one pillar 1 of the building unit A, and the connector 30 makes the upper and lower flanges 31 and 32 square, A single bolt hole 50 </ b> A is formed in the flange 31.

Therefore, the joining procedure of the building unit A is as follows (FIGS. 1 and 2).
(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.

(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) Installation of pile head cap 20 (Fig. 1 (C))
A pile head cap 20 is put on the pile head of the pile 10 and welded. 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.

  FIG. 5B is a bottom view of the pile 10, the pile head cap 20, and the connector 30 as viewed upward from the ground side, but the solid line pile 10 and the pile head cap 20 are in their normal positions, and the broken line pile 10 and the pile. The head cap 20 is the position when the horizontal displacement occurs in the pile core, and the bolt hole 40A provided in the lower flange 32 of the connector 30 is the pile head cap displaced from the normal position according to the horizontal displacement of the pile core. It is drilled at a position that matches a bolt hole drilled in advance in the 20 cover plates 22. Thereby, the construction of the pile 10 is performed by adjusting the bolting position of the joint 30 with respect to the pile 10 and the pile head cap 20 while arranging the joint 30 at the normal position corresponding to the predetermined installation position of the building unit A. Absorbs horizontal displacement of pile core due to errors.

(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 the liner via a height adjusting liner on the lid 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, and the floor piece 3 (or 5) superimposed on the lower piece of the joint piece 2 attached to the pillar 1 and the lower piece of the joint piece 2. The lower piece is fixed to the upper flange 31 with the 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.

According to the present embodiment, the following operational effects can be obtained.
(a) The pile head cap 20 was interposed between the upper end part of the pile 10 and the connector 30 to which the building unit A is fixed. Accordingly, when the lower plate 32 of the joint tool 30 is fixed on the top surface of the pile head cap 20 that is fixed on the upper end portion of the pile 10, the joint tool 30 installs the pile 10 on the pile head cap 20. It can absorb and fix the horizontal displacement of the pile core due to accuracy. The building unit A is simply placed on the upper plate 31 of the connector 30 at a fixed position, which is determined from the beginning, and the building unit A is arranged at the initial planned installation position regardless of the horizontal displacement of the pile core.

  (b) The joining tool 30 is opened to the outside without being blocked at both ends while being strengthened by forming a longitudinal cross-section die. Accordingly, when the lower plate 32 of the connector 30 is fixed to the pile head cap 20 or the building unit A is fixed to the upper plate 31 of the connector 30, a hand is placed between the upper plate 31 and the lower plate 32 of the connector 30. It is easy to put in, and fixing workability such as bolting can be improved. Moreover, the H-shaped steel which is a general item can be utilized as a raw material of the connector 30, and cost can be reduced.

  (c) The joint 30 is reinforced by the stiffener 34 with the flanges 31 and 32 which are two parallel plates and the web 33 which is the remaining one plate, thereby further strengthening the joint 30. Can be

  (d) When the stiffener 34 of the connector 30 has a column in the building unit A, it is provided directly below the contour of the column, so that the load of the building unit A is passed directly through the stiffener 34 of the connector 30 and piled. 10 and the support strength of the building unit A can be improved.

Example 2 (FIGS. 6 to 8)
The pile 10, the pile head cap 20, and the connector 30 of the second embodiment are substantially the same as those of the first embodiment, but the two adjacent building units A adjacent to each other in the wife direction of the building unit A. The connector 30 is provided below the columns 1, 1. The upper and lower flanges 31, 32 are formed in the same square as the flanges 31, 32 of the first embodiment, and two bolt holes 50 </ b> A are formed in the upper flange 31. Has been configured.

  FIG. 8B is a bottom view of the pile 10, the pile head cap 20, and the connector 30 as viewed upward from the ground side, but the solid line pile 10 and the pile head cap 20 are in their normal positions, and the broken line pile 10 and pile. The head cap 20 is the position when the horizontal displacement occurs in the pile core, and the bolt hole 40A provided in the lower flange 32 of the connector 30 is the pile head cap displaced from the normal position according to the horizontal displacement of the pile core. It is drilled at a position that matches a bolt hole drilled in advance in the 20 cover plates 22. Thereby, the construction of the pile 10 is performed by adjusting the bolting position of the joint 30 with respect to the pile 10 and the pile head cap 20 while arranging the joint 30 at the normal position corresponding to the predetermined installation position of the building unit A. Absorbs horizontal displacement of pile core due to accuracy.

  Even in the second embodiment, the same effect as in the first embodiment is obtained.

Example 3 (FIGS. 9 to 11)
The pile 10, the pile head cap 20, and the connector 30 of the third embodiment are substantially the same as those of the first embodiment, but two adjacent two building units A adjacent to each other in the girder direction of the building unit A. The connector 30 is provided below the columns 1, 1, and the connector 30 is configured by making the upper and lower flanges 31, 32 into a rectangular shape that is long in the girder direction, and two bolt holes 50 </ b> A are formed in the upper flange 31. .

  FIG. 11 (B) is a bottom view of the pile 10, the pile head cap 20, and the connector 30 as viewed upward from the ground side, but the solid line pile 10 and the pile head cap 20 are in their normal positions, and the broken line pile 10 and pile. The head cap 20 is the position when the horizontal displacement occurs in the pile core, and the bolt hole 40A provided in the lower flange 32 of the connector 30 is the pile head cap displaced from the normal position according to the horizontal displacement of the pile core. It is drilled at a position that matches a bolt hole drilled in advance in the 20 cover plates 22. Thereby, the construction of the pile 10 is performed by adjusting the bolting position of the joint 30 with respect to the pile 10 and the pile head cap 20 while arranging the joint 30 at the normal position corresponding to the predetermined installation position of the building unit A. Absorbs horizontal displacement of pile core due to accuracy.

  Even in the third embodiment, the same effect as in the first embodiment is obtained.

Example 4 (FIGS. 12 to 14)
The pile 10, the pile head cap 20, and the connector 30 of the fourth embodiment are substantially the same as those of the first embodiment. The connector 30 is provided below the three pillars 1, 1, 1, and the connector 30 has upper and lower flanges 31, 32 having a long L shape in the girder direction and the wife direction, and three bolt holes 50 </ b> A in the upper flange 31. Is formed.

  FIG. 14B is a bottom view of the pile 10, the pile head cap 20, and the connector 30 as viewed upward from the ground side, but the solid line pile 10 and the pile head cap 20 are in their normal positions, and the broken line pile 10 and the pile. The head cap 20 is the position when the horizontal displacement occurs in the pile core, and the bolt hole 40A provided in the lower flange 32 of the connector 30 is the pile head cap displaced from the normal position according to the horizontal displacement of the pile core. It is drilled at a position that matches a bolt hole drilled in advance in the 20 cover plates 22. Thereby, the construction of the pile 10 is performed by adjusting the bolting position of the joint 30 with respect to the pile 10 and the pile head cap 20 while arranging the joint 30 at the normal position corresponding to the predetermined installation position of the building unit A. Absorbs horizontal displacement of pile core due to accuracy.

  Even in the fourth embodiment, the same effect as in the first embodiment is obtained.

Example 5 (FIGS. 15 to 17)
The pile 10, the pile head cap 20, and the connector 30 of the fifth embodiment are substantially the same as those of the first embodiment, but the four building units A adjacent to each other in the girder direction and the wife direction of the building unit A are adjacent to each other. The connector 30 is provided below the four pillars 1, 1, 1, 1, and the connector 30 has upper and lower flanges 31, 32 having a long rectangular shape in the wife direction, and four bolt holes 50 </ b> A in the upper flange 31. It is constructed by drilling.

  FIG. 17B is a bottom view of the pile 10, the pile head cap 20, and the connector 30 as viewed upward from the ground side, but the solid line pile 10 and the pile head cap 20 are in their normal positions, and the broken line pile 10 and the pile. The head cap 20 is the position when the horizontal displacement occurs in the pile core, and the bolt hole 40A provided in the lower flange 32 of the connector 30 is the pile head cap displaced from the normal position according to the horizontal displacement of the pile core. It is drilled at a position that matches a bolt hole drilled in advance in the 20 cover plates 22. Thereby, the construction of the pile 10 is performed by adjusting the bolting position of the joint 30 with respect to the pile 10 and the pile head cap 20 while arranging the joint 30 at the normal position corresponding to the predetermined installation position of the building unit A. Absorbs horizontal displacement of pile core due to accuracy.

  Even in the fifth embodiment, the same effects as in the first embodiment are obtained.

  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.

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 front view showing a joint structure between a pile and an upper structure according to the first embodiment. FIG. 4 is a side view of FIG. 5A is a top view of FIG. 3, and FIG. 5B is a bottom view of FIG. FIG. 6 is a front view showing a joint structure between a pile and an upper structure according to the second embodiment. FIG. 7 is a side view of FIG. 8A is a top view of FIG. 6, and FIG. 8B is a bottom view of FIG. FIG. 9 is a front view showing a joint structure between a pile and an upper structure according to the third embodiment. FIG. 10 is a side view of FIG. 11A is a top view of FIG. 9, and FIG. 11B is a bottom view of FIG. FIG. 12 is a front view showing a joint structure between a pile and an upper structure according to the fourth embodiment. FIG. 13 is a side view of FIG. 14A is a top view of FIG. 12, and FIG. 14B is a bottom view of FIG. FIG. 15 is a front view illustrating a joint structure between a pile and an upper structure according to the fifth embodiment. FIG. 16 is a side view of FIG. 17A is a top view of FIG. 15, and FIG. 17B is a bottom view of FIG.

Explanation of symbols

A building unit (superstructure)
10 Pile 20 Pile Head Cap 30 Joint 31, 32 Plate (Flange)
33 web 34 stiffener

Claims (3)

  A pile head cap is fixed on the upper end of the pile and fixed, and a joint with a vertical cross section is horizontally placed on the upper surface of the pile head cap, and one of the two parallel plates of the joint is the pile. A joint structure of a pile and an upper structure, wherein the upper structure is fixed to the upper surface of the head cap, and the upper structure is fixed to the other upper surface of the two parallel plates of the connector.   The joint structure of a pile and an upper structure according to claim 1, wherein the flange that is the two parallel plates and the web that is the remaining one plate are reinforced by a stiffener.   The joint structure of a pile and an upper structure according to claim 2, wherein when the upper structure has a column, the stiffener is provided immediately below the contour portion of the column.

Images