JPH11336093A - Connecting method for pile and pillar - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve accuracy in erection by a method wherein the lower end of a pillar is placed on a flange at the upper part of a pile exposed to the ground surface, and after adjustment of perpendicularity or the like of the pillar, the pile and the pillar are connected together. SOLUTION: A pile 6 made of steel or the like is buried in an excavated hole 4 excavated until reaching a bearing stratum 3a, and the pile 6 is fixed to the ground 3 with the excavated hole 4 is filled with fixing agent 7 such as cement milk. Then, a flange 8 in a diameter larger than the pile 6 is fixed to the upper end surface of the pile 6, and the flange 8 is exposed at a position near the surface layer 3b of the ground 3. Then, while the lower end of a steel pillar 9 placed above the ground is mounted on the upside of the flange 8, adjustment is made to perpendicularity and the position in the horizontal direction for the pillar 9. Then, the pillar 9 and the flange 8 are joined together by welding, or a pillar-side flange is fixed to the lower end of the pillar 9 and connected to the flange 8 with bolts, and strength against self-weight of a building structure 2 or a horizontal force of earthquake is ensured. Thereby, perpendicularity and the position in the horizontal direction can be adjusted freely for the pillar, and necessary strength can be ensured sufficiently for the building structure.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for connecting a pile inserted into the ground and a pillar erected on the ground, and particularly to a building structure suitable for a low-rise store or warehouse. The present invention relates to a method for connecting a pile and a column.

[0002]

2. Description of the Related Art Conventionally, a method disclosed in Japanese Unexamined Patent Publication No. 9-279607 has been known as a method for connecting a pile of this kind to a column. Thus, the method for connecting a pile and a pillar disclosed in the publication discloses a tubular pile embedded in the ground, and
A bolt hole is provided at the upper end of the pile. On the other hand, a flange is fixed to an outer surface of a lower portion of a steel pipe which is fitted and fixed in a hollow portion at an upper end portion of the pile, and a through hole is provided in the flange at a position facing the bolt hole, A lower end portion of the steel pipe is inserted into a hollow portion of an upper end portion of the pile buried in the ground, and the flange provided on the steel pipe is brought into contact with an upper end surface of the pile. Align the through-holes provided in the flanges, screw the bolts into the matched through-holes and the bolt insertion holes, respectively, and tighten them. Thus, the upper steel pipe is connected to the lower pile, and both are integrated. A method of joining a pile and a steel pipe so as to be securely fixed is disclosed in the same publication.

[0003]

In the above prior art, when the lower end of a steel pipe erected on the ground is connected to the upper end of a pile buried underground, the lower end of the steel pipe is connected to the upper end of the pile. Fit into the hollow part, and match the bolt hole provided on the upper end surface of the pile with the through hole formed in the flange protruding from the lower part outer surface of the steel pipe, and fix both by bolting doing. Therefore, when connecting the steel pipe in the ground part to the upper surface of the lower pile, the verticality of the steel pipe cannot be adjusted.

[0004] Therefore, when a pillar is connected to a stake, a technical problem to be solved arises because the construction accuracy of the pillar deteriorates, and the present invention aims to solve the problem. And

[0005]

DISCLOSURE OF THE INVENTION The present invention has been proposed to achieve the above object, and is a pile having a flange fixed to a top, which is inserted into the ground. At the same time, after exposing the flange of the pile to the ground surface, placing the lower end of the column on the flange, and adjusting the verticality and horizontal direction of the column, the column is connected to the flange of the pile. It is intended to provide a method for connecting a pile and a column fixedly mounted on a floor.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below in detail with reference to FIGS. FIG. 1 shows a state in which a frame of a building structure 2 has been constructed on a site, and excavation holes 4 and
Are excavated by an earth auger or the like, or the ground 3 is excavated while the steel pile 6 itself having the excavation blade 5 at its tip is rotated by a rotation mechanism (not shown). 4a, and a steel pile 6 is provided in the borehole 4 or 4a.
Buried. At this time, the excavation hole 4 or 4a is
Drilled until it reaches a. Therefore, the steel pile 6 is buried in the ground 3 while being supported by the support layer 3a. Needless to say, the excavation hole 4 or 4a is filled with a pile circumference fixing agent 7 such as cement milk, and the pile 6 is embedded and fixed in the ground 3.

When the steel pile 6 is inserted into the ground 3, when the support layer 3a is deep, the steel pile 6 is appropriately welded or the like until the lower end of the pile 6 reaches the support layer 3a. A flange 8 having a larger diameter than the pile 6 is fixed to the upper end face of the pile 6 at the uppermost part. Thus, the flange 8 is exposed in the vicinity of the surface layer 3b of the ground 3, and the lower end of the steel pillar 9 constituting the pillar on the ground is placed on the upper surface of the flange 8. At this time, the steel column 9 is lifted by a crane (not shown) or the like and placed on the upper surface of the flange 8, and the verticality of the column 9 is adjusted on the flange 8. When a clearance C is generated between the lower end surface of the column 9 and the upper surface of the flange 8 by this verticality adjustment, the upper steel column 9 and the lower flange 8 including the clearance C are welded by overlay welding 10. Then, the pile 6 in the ground 3 and the pillar 9 on the ground are connected. In that case, since the steel columns 9 on the ground portion maintain the verticality, it is possible to secure required strength against the own weight of the building structure 2 and horizontal force due to an earthquake or the like.

As shown in FIGS. 3 and 4, a column-side flange 8a corresponding to the flange 8 is fixed to the lower end of the column 9 in place of the overlay welding 10, and the flange 8 and 8a, bolt insertion holes 11, 11 are provided at locations facing each other.
Are formed, and the bolt insertion holes 11, 11 are formed in at least one of the flanges 8 or 8a in both the width direction and the longitudinal direction. In this manner, after the verticality and the horizontal direction of the pillar 9 on the ground portion are adjusted as described above, the bolt insertion holes 11, 1 facing the upper and lower portions respectively.
., And if necessary, a shim plate (not shown) is interposed in the clearance C so that the bolt insertion hole 1 is formed.
The steel columns 9 may be connected to the steel piles 6 buried in the ground 3 by inserting and tightening the bolts 12, 12,. In such a case, the hydraulic stress can be sufficiently secured.

As shown in FIG. 1, the surface layer 3b of the ground 3
The ground can be improved by injecting a solidifying agent from the ground surface. Also, the depth of the ground improvement portion 13 is approximately 1
m, but the height of the building structure 2 and the pile 6,
6 and the columns 9 can be arbitrarily increased or decreased according to the physical properties (hardness or the like) of the solidifying agent.

As described above, by artificially improving the surface layer 3b, the rigidity of the surface layer 3b is improved, and the ground characteristics can be accurately evaluated. Thus, the pile 6,6 ...
.. Can be controlled, and the required strength of the building structure 2 can be sufficiently secured even without the underground beam.

Further, earth concrete 14 as a floor slab laid on the ground surface may be cast on the surface layer 3b. In this case, the soil concrete 14 and the piles 6, 6
... or the pillars 9, 9 ... are cut off and the piles 6, 6 ... or the columns 9, 9
9 ... do not come into contact with the earth concrete 14,
Therefore, mutual destruction of the concrete 14 between the soil and the piles 6, 6,... Or the columns 9, 9,.

Since the column 9 is made of steel, the braces 15, 15 made of an iron plate or the like are erected by being tightened with bolts, and further, the upper end portions of the columns 9, 9 are formed. Are similarly tightened with bolts, and the building structure 2 is completed.

The present invention can be variously modified without departing from the spirit of the present invention, and it goes without saying that the present invention extends to the modified ones.

[0014]

According to the present invention, as described in detail in the above-described embodiment, a pillar in the ground portion is connected to a pile buried underground to integrate the pile with the pillar. Since a flange having a diameter larger than that of the pile is fixed to the upper end surface of the pile, the lower end surface of the pillar is attached to the upper surface of the flange of the pile when connecting the pillar on the ground. After placing and adjusting the verticality and horizontal direction of the pillar, the pillar is connected to the stake.
At this time, since the flange is configured to have a diameter larger than the diameter of the pile, the verticality and the horizontal direction of the column can be freely adjusted, and both the pile and the column are made of steel. If it is, it can be easily connected by welding or the like, and it is also possible to attach the brace or girder using bolts and the column and the brace or girder using bolts. In addition, the present invention has an extremely significant effect, such as a sufficient strength of the building structure can be sufficiently secured in combination with the adjustment in the horizontal direction.

[Brief description of the drawings]

FIG. 1 is a partially cutaway explanatory sectional view showing a state in which a steel pillar is connected to a steel pile according to an embodiment of the present invention.

FIG. 2 is a partially cutaway enlarged front view showing a joint between a pile and a column in FIG. 1;

FIG. 3 is a partially cutaway front view showing another embodiment of the joint portion between the pile and the pillar in FIG. 2;

FIG. 4 is a plan view of the flange of FIG. 3;

[Explanation of symbols]

 3 Ground 4 Drilling hole 5 Drilling blade 6 Pile 8 Flange 9 Column

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Mika Shoji 2-1, Tsukudo-cho, Shinjuku-ku, Tokyo Kumagaya Gumi Tokyo head office

Claims (1)

[Claims] 1. A pile having a flange fixedly mounted on a top thereof, said pile being inserted into the ground, exposing said flange of said pile to the surface of the ground, and a lower end of a steel column being placed on said flange. A method for connecting a stake and a pillar, comprising mounting the part, adjusting the verticality and the horizontal direction of the pillar, and then fixing the pillar to a flange of the stake.