JP3665855B2 - Pile and column joining method - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a building foundation, and more particularly, to a simple and rational joining method for piles and columns.
[0002]
[Prior art]
The piles at the foundation of the building must be securely joined to the columns to support the superstructure loads. For this reason, it is common in the past to provide a large footing at the joint between the pile and the column to ensure a firm joint and to provide a foundation beam between adjacent footings.
[0003]
[Problems to be solved by the invention]
In the conventional general foundation structure as described above, it is inevitable to increase the foundation construction cost by installing footings and foundation beams. In particular, the construction of footings is complicated and troublesome because many rebars are complicated vertically and horizontally. .
[0004]
For this reason, in recent years, it has been attempted to directly connect the pile and the column by omitting the footing and the foundation beam. However, an effective and appropriate structure capable of simply and reliably connecting the pile and the column and its The construction method has not been established and is still in the trial stage.
[0005]
In view of the above circumstances, an object of the present invention is to provide an effective method capable of joining a pile and a column sufficiently simply and reliably.
[0006]
[Means for Solving the Problems]
The present invention provides a pile head joint hardware having a bolt for fastening a column base fixed to a pile head of a hollow pile, and a pillar base plate is fastened to the bolt to thereby pile the pile head through the pile head joint hardware. The head and the column base are joined, and the column base portion extended below the base plate is inserted into the hollow portion of the pile head, and the hollow portion is filled with concrete and the column base portion is piled through the concrete. A method of joining a pile and a column to be fixed to the head, wherein the pile head joint hardware is provided with a connecting piece for connecting a wire for re-installation at the time of column construction, After the construction, the pile head joint hardware is positioned and fixed to the pile head, and when the column is built, the bolt is inserted into the bolt hole of the base plate of the column to perform positioning and level adjustment, and the column Connect one end of the wire to the column head of The other end of the wire is connected to a connecting piece of a pile head joint hardware fixed to the pile head of another pile, and the wire is stretched to rebuild the pillar, and then the base plate Is fastened to the pile head joint with the bolt, and the pile head is filled with concrete.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
1 to 3 show a first embodiment of the present invention. In the first embodiment, footings and foundation beams in a conventional general foundation are omitted, and the pile 1 and the column 2 are joined via the pile head joint hardware 3.
[0010]
The pile 1 in the first embodiment is a ready-made hollow PC pile, and an annular PC fixing steel plate 4 for fixing a PC steel wire is fixed to the pile head, and a reinforcing steel plate 5 is fitted around the pile head. It is what is worn.
[0011]
The column 2 in the first embodiment is a steel pipe column having a circular cross section, and a base plate 6 is integrally provided on the column base, and the base plate 6 is fastened to the pile head via the pile head joint hardware 3, In addition, the column base 7 is fixed to the pile 1 by inserting the column base 7 extending below the base plate 6 into the hollow portion of the pile 1 and casting and filling the concrete 8 there. Has been. The column base 7 is preferably provided with a stud 9 for increasing the fixing strength.
[0012]
The pile head joint metal 3 in the first embodiment is made of a steel plate, and a predetermined standard bolt 10 (for example, M20 ×) is formed on the upper surface of an annular main body 3a substantially matching the cross-sectional shape of the pile 1 as shown in FIG. 170) are planted (four in the illustrated example). The numbers and positions of the bolts 10 correspond to the bolt holes 11 formed in the base plate 6 of the pillars 2 to be joined. The bolts 10 may be implanted into the main body 3a by welding, or as shown in FIG. 3C, the lower end of the bolt 10 may be screwed into a screw hole provided in the main body 3a and tightened with a nut. In that case, as shown in (d) or (e), it is preferable to provide a flat part or a rectangular head part for applying a spanner to the intermediate part or the head part of the bolt 10. Moreover, the connection piece 12 which protrudes in four directions is provided around the main-body part 3a. These connecting pieces 12 are for connecting the wires 13 that support the pillars 2 when the pillars are erected, and a shackle hole 14 is provided at the tip thereof. The wire 13 is for re-installing the pillar 2 when it is erected, and connects one end of the wire 13 to the pillar head of the pillar 2 to be erected, and the other end of the wire 13 is adjacent to the periphery. By connecting to the connecting pieces 12 in the other pile head joint hardware 3 fixed to the pile heads of the other piles 1 and stretching the wires 13 diagonally as shown in FIGS. The pillar 2 is rebuilt and temporarily supported in a self-supporting state.
[0013]
The structure in the case of joining the pile 1 and the pillar 2 using the said pile head joint metal fitting 3 is demonstrated concretely with the construction procedure.
[0014]
After constructing the pile 1, the pile head joint 3 is fixed to the pile head. The pile head joint 3 is fixed to the pile head by directly welding the main body portion 3a to the PC fixing steel plate 4 fixed to the pile head. At that time, the position of the pile head joint 3 is accurately matched with the built-in position of the pillar 2, and the protruding direction of each connecting piece 12 is matched with the core of the pillar 2.
[0015]
And by inserting the bolt hole 11 formed in the base plate 6 of the column 2 into each bolt 10 of the pile head joint metal 3, the column 2 is inserted in the state where the column base 7 is inserted into the hollow portion of the pile head. Build. At this time, the horizontal positioning of the pillar 2 is naturally accurately performed by the bolt 10, but the level adjustment (vertical positioning) of the pillar 2 is performed by the lower nut 15 screwed to the bolt 10. In addition, one end of the wire 13 is connected to the column head and the other end of the wire 13 is connected to the connection piece 12 of the pile head joint 3 fixed to the pile head of another adjacent pile 1 through a shackle. Then, the pillar 2 is rebuilt and temporarily supported.
[0016]
After the pillar 2 is built and positioned as described above, the base plate 6 is fastened to the pile head joint 3 by screwing the upper nut 16 to the bolt 10, and the concrete 8 is placed in the hollow portion of the pile head. The column base 7 is fixed to the pile head by casting and filling.
[0017]
According to the construction method of the first embodiment, the pile 1 and the column 2 can be securely and firmly joined together, and the construction can be performed very simply and easily. In particular, since the pile 1 and the pillar 2 are joined via the pile head joint hardware 3 in which the bolts 10 are planted, the pillar 2 can be built and positioned easily and accurately, If the pile 1 is constructed with a deviation from the built-in position of the pillar 2, the positional deviation can be easily and accurately adjusted by adjusting the fixing position of the pile head joint 3 with respect to the pile 1. It can be corrected. In addition, since the connecting piece 12 for connecting the wire 13 for re-installation is provided in the pile head joint hardware 3 at the time of pillar construction, a hardware for connecting the wire 13 as usual is prepared separately. Therefore, the wire 13 can be stretched immediately when the pile head joint 3 is fixed to the pile head, which is also excellent in workability and rational. Of course, the pile head joint hardware 3 can be manufactured at low cost because it has a simple structure in which a steel plate is processed and a bolt 10 is implanted.
[0018]
In addition, although it has been attempted in the past to directly weld each bolt 10 to the PC fixing steel plate 4 of the pile head without using such a pile head joint fitting 3, Not only is it necessary to weld each bolt 10 individually, but also the upper surface of the PC fixing steel plate 4 has a large number of irregularities for fixing the PC steel wire. It is not always easy to perform welding while positioning the bolt 10, and the bolt 10 may not be welded to the optimum position. In that respect, as in the first embodiment, a pile head joint metal 3 manufactured in advance corresponding to the shape and dimensions of the pile 1 and the pillar 2 is used, and the whole is collectively collected in a state where it is overlapped on the PC fixing steel plate 4. Then, by welding and fixing, workability and construction accuracy can be remarkably improved as compared with the case where each bolt 10 is individually positioned and welded.
[0019]
Although the first embodiment of the present invention has been described above, the shape and dimensions of the pile head joint hardware 3 may be appropriately set in accordance with the shapes and dimensions of the pile 1 and the pillar 2 to be joined. For example, FIG. As shown in FIG. 4, changes such as changing the planting position of the bolt 10 or increasing or decreasing the number of the bolts 10 are arbitrary.
[0020]
Next, a second embodiment will be described with reference to FIGS. In the said 1st Embodiment, although the cyclic | annular pile head joining metal | hardware 3 was employ | adopted, in this 2nd embodiment, the strip-shaped pile head joining hardware 20 is used in multiple numbers (in the example of illustration). The pile head joint hardware 20 is planted by welding or screwing one bolt 21 on the upper surface of the base end portion of the strip-shaped main body portion 20a, and a connecting piece 23 having a shackle hole 22 at the front end portion of the main body portion 20a. Is formed.
[0021]
In order to join the pile 1 and the pillar 2 using this pile head joint hardware 20, after constructing the pile 1, the main body in the state where each of the above pile head joint hardware 20 protrudes to the outside respectively. The base end portion of the portion 20 a is welded and fixed to the PC fixing steel plate 4. At that time, the position of each bolt 21 is made to exactly match the position of the bolt hole 11 of the base plate 6 and the direction of the connecting piece 23 is made to match the core direction. Thereafter, as in the first embodiment, the bolt holes 11 of the base plate 6 are inserted into the bolts 21 to build the pillars 2, and the wires 13 are connected to the connecting pieces 23 of the pile head joints 20 to connect the pillars 2. And then temporarily supporting it, adjusting the level with the lower nut 15, fastening with the upper nut 16, and placing the concrete 8.
[0022]
In this 2nd Embodiment, since each pile head joining hardware 20 is positioned and fixed individually with respect to a pile head, each pile head joining is compared with the case where the cyclic | annular pile head joining hardware 3 of 1st Embodiment is used. Although the effort to fix the hardware 20 to the pile head will increase, conversely, each pile head joint hardware 20 can be independently fixed at a desired position, and the number of uses should be increased or decreased as appropriate. Therefore, this pile head joint hardware 20 can be widely adopted in general when joining the pile 1 and the pillar 2 of various shapes and dimensions, and thus joins the pile 1 and the pillar 2 of a specific shape and dimension. There exists an advantage which is excellent in versatility rather than the pile-head-joint metal fitting 3 of 1st Embodiment which needs to produce beforehand as an exclusive thing.
[0023]
Although the first and second embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and modifications and applications as listed below are possible.
[0024]
The column in the present invention may be any column as long as the base plate is fastened to the pile head joint hardware. Shaped columns can be used.
[0026]
In the above embodiment employs a ready-made hollow PC pile as the pile 1 has been so fixed by welding Pile Head Connection fittings 3,20 to the PC fixing steel 4 of the pile head, hollow other structures A pile can also be used, and the form of the pile head joint hardware and the structure fixed to the pile may be changed according to the structure of the pile. For example, when adopting a steel pipe pile, a pile head joint metal may be welded directly to the pile head .
[0027]
The pile head joint hardware only needs to have a bolt for fastening the base plate of the pillar and a connection piece for connecting the wire for re-installation. To that extent, the annular pile head joint hardware of the first embodiment is used . In addition to the strip-shaped pile head joint hardware 20 of the third and second embodiments, various shapes and sizes can be employed .
[0028]
【The invention's effect】
According to the present invention, the pile head joint hardware in which bolts for fastening the column base are planted is fixed to the pile head, and the base plate of the column base is fastened to the bolt so that the pile head and the column base are connected to the pile head. By joining through the joint hardware , the pile and the column can be securely and simply joined together, and the foundation structure can be sufficiently simplified.
[0029]
Moreover, while adopting a hollow pile as the said pile, the column base part of the said column is extended below the base plate, and the column base part is piled by inserting the column base part into the pile head and filling with concrete. By adhering to the head, the joint strength between the pile and the column and the stress transmission between them can be further increased.
[0030]
In addition, after the pile is constructed , the pile head joint hardware in which the bolts for fastening the column base are planted is positioned and fixed to the pile head, and the column is positioned by inserting the bolt into the bolt hole of the base plate. It is a method to build and adjust the level, and then fasten the base plate to the pile head joint with the bolt to join the pile and the column, so it is easy to build and position the column and adjust the level Even if the pile is shifted from the built-in position of the pillar, it is easy to shift the position by adjusting the fixed position of the pile head joint to the pile. And can be corrected accurately.
In addition, since the pile head joint hardware is provided with a connection piece for connecting the wire for re-installation in the case of pillar construction, a hardware for connecting the wire is prepared separately as usual. It is possible to eliminate the hassle of attaching, and when the pile head joint hardware is fixed to the pile head, it becomes possible to immediately stretch the wire. In this respect as well, it is excellent in workability, and the pile head joint hardware is a steel plate. Since this is a simple structure in which a bolt is planted and a connecting piece is provided, it can be manufactured at low cost.
[Brief description of the drawings]
FIG. 1 is a diagram showing a method of joining a pile and a pillar according to a first embodiment of the present invention.
FIG. 2 is an exploded view of the joint portion.
FIG. 3 is a view showing an example of a pile head joint hardware.
FIG. 4 is a view showing another example of the pile head joint hardware.
FIG. 5 is a diagram showing a method for joining a pile and a pillar according to a second embodiment of the present invention.
FIG. 6 is an exploded view of the joint portion.
FIG. 7 is a view showing an example of a pile head joint hardware.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Pile 2 Column 3 Pile head joint 3a Main part 4 PC fixing steel plate 5 Reinforced steel plate 6 Base plate 7 Column base 8 Concrete 9 Stud 10 Bolt 11 Bolt hole 12 Connection piece 13 Wire 14 Shackle hole 15 Lower nut 16 Upper nut 20 Pile Head joint 20a Main body 21 Bolt 22 Shackle hole 23 Connecting piece

Claims (1)

The pile head joint hardware with bolts for fastening the column base is fixed to the pile head of the hollow pile, and the base plate of the pillar is fastened to the bolt to fasten the pile head and the column base via the pile head joint hardware. And the column base part extended below the base plate is inserted into the hollow part of the pile head, the concrete is filled in the hollow part, and the column base part is fixed to the pile head through the concrete. A method of joining piles and columns
  The pile head joint hardware is provided with a connecting piece for connecting a re-installation wire at the time of column construction, and after the pile is constructed, the pile head joint hardware is positioned and fixed to the pile head. ,
  When building a pillar, the bolt is inserted into the bolt hole of the base plate of the pillar to position and adjust the level, and one end of the wire is connected to the pillar head of the pillar and the other end of the wire is connected to the other. The pillar is rebuilt by connecting the connecting piece of the pile head joint hardware fixed to the pile head of the pile of the
  Thereafter, the base plate is fastened to the pile head joint hardware with the bolts, and the pile head is filled with concrete.

Images