JP2733537B2 - Connection structure between pile and superstructure - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a structure of a foundation portion of a lightweight building such as a prefabricated building or a prefabricated barn using a lightweight and short pile, and in particular, a pile of a lightweight building. And a connection structure between the upper structure and the upper structure.

[Prior Art] Conventionally, on a foundation of a light-weight building, a hole is drilled in the ground to bury a pile in the ground, and a pile is inserted into the hole to backfill the soil. The pile to be buried had the lower diameter equal to the upper diameter. The upper part of the pile was simply buried in the foundation.

[Problems to be Solved by the Invention] However, when a pile having a lower diameter equal to that of an upper diameter is used as described above, it is necessary to obtain a large supporting force by using a long pile in order to obtain a supporting force. Therefore, even in a light-weight building, it was necessary to dig a long hole in the ground and insert a pile.

Further, conventionally, when a pile is buried in a hole, the level at the upper end of the pile is different each time, so that it is necessary to set the upper end and cut it to a predetermined level.

Also, conventionally, when a foundation is constructed on a pile, the connecting means between the foundation and the pile and the reinforcement inside the foundation are separate parts, which makes the construction troublesome and increases the number of members. There was a problem that cost was high.

The present invention has been made in view of the above points,
The purpose is to form a foundation for a light-weight building such as a prefabricated building or a prefabricated barn. The object of the present invention is to provide a connection structure between a pile and a superstructure, which can be surely provided.

Another object is to provide a connection structure between the pile and the upper structure that is strong against horizontal force acting on the upper part of the pile.

Another object of the present invention is to provide a connection structure between a pile and an upper structure that can easily adjust the level of the upper end of the pile.

Another object of the present invention is to provide a connection structure between a pile and an upper structure in which connection means can be used as a vertical streak of a foundation as it is.

[Means for Solving the Problems] In order to solve the above-mentioned problems of the conventional example, the connection structure between the pile and the upper structure according to the present invention comprises a soil hardener formed on the ground 1 or a soil hardener and soil and sand. And a stake 7 having an enlarged portion 4 in the lower part of the hole 3 filled with the filling material 2 and a connecting means 6 for connecting the upper structure 5 to the upper structure 5 in the upper part. The body 5 was connected.

In addition, the hole 3 filled with the wet hardening material 2 in a state before hardening in which the soil hardening agent or the soil hardening agent and the earth and sand formed on the ground 1 are mixed has an enlarged portion 4 at the lower portion and an upper portion at the upper portion. The stake 7 provided with the connecting means 6 to the upper structure 5 is inserted,
The upper part of the hole 3 may be filled with a dry top filler 33.

Further, the connecting means 6 may be provided with a vertical dimension adjusting section 8.

Further, the connecting means 6 may be the vertical streak 10 of the foundation 9.

[Operation] In other words, in the present invention, since the pile 7 having the enlarged portion 4 at the lower portion is inserted into the hole 3 filled with the soil cement 2, the supporting force is increased by the enlarged portion 4 and the enlarged portion is enlarged at the lower portion. The pile 7 having the portion 4 is integrated with the soil cement 2 to further increase the supporting force. Also. The connection with the upper structure 5 can be easily performed by using the connection means 6 provided on the upper part.

In addition, the hole 3 filled with the wet hardening material 2 in a state before hardening in which the soil hardening agent or the soil hardening agent and the earth and sand formed on the ground 1 are mixed has an enlarged portion 4 at the lower portion and an upper portion at the upper portion. Since the pile 7 provided with the connecting means 6 for connecting to the upper structure 5 is inserted, the pile 7 having the enlarged portion 6 is inserted in the lower portion. Can be easily inserted. Then, by filling the upper portion of the hole 3 with the dry upper filler 33, the dry filler was squeezed, whereby the pile 3 became stronger against the horizontal force acting on the upper portion of the pile 7.

Further, if the connecting means 6 is provided with the vertical dimension adjusting portion 8, the position of the connecting means 6 at the upper end of the pile 7 can be easily adjusted to connect the upper structure 5 at an accurate position.

Further, when the connecting means 6 is used as the vertical streaks 10 of the foundation 9, the connecting means 6 also serves as the vertical streaks 10, thereby simplifying the work and reducing the number of members.

EXAMPLES The present invention will be described below in detail based on examples of the accompanying drawings.

1 and 2 show an embodiment of the present invention.
A hole 3 filled with soil cement 2 is drilled in the ground 1. In this case, an apparatus as shown in FIG. 2 is used. Second
The apparatus shown in the figure is configured such that an auger 13 such as a spiral auger is provided on one side of a double-sided reader 11 so as to be vertically movable, and a monoken 14 is provided on the other side so as to be vertically movable. In FIG. 2, reference numeral 15 denotes a crane boom, on which the upper part of the leader 11 is attached, and
Is supported by the ground 1. A lower part of the leader 11 is provided with a swing-stop member 17 so as to be freely rotatable, and the reader 11 is further provided with a level 18. 19 in the figure is auger
13 is a hydraulic speed reducer for rotating 13. Then, the device having the above configuration is installed and fixed with the auger 13 aligned with the pile core. Then, the verticality is checked by the level 18 (see FIG. 2A). Next, as shown in FIG. 2 (b), the earth and sand are excavated by the auger 13 and the hole 3 is filled with the filling 2 made of a soil hardener or a mixture of the soil hardener and the earth and sand. In this case, as a soil hardening agent, for example, there is cement milk, and a solidifying agent of the cement milk is charged and stirred to form a soil cement, and the soil cement is filled in the lower part of the hole 3. That is, in this embodiment, the hole 3 is filled with the filler 2 made of soil cement.
Here, the soil hardening agent is not limited to cement milk, and other soil hardening agents can be used. However, a wet soil hardening agent is used and is filled in the hole 3. The filler 2 is made to be in a wet state before curing. Next, after raising the auger 13, the leader 11 is rotated to place the monoken 14 on the pile core. Then, a pile 7 having an enlarged portion 4 at a lower portion and a connecting means 6 for connecting to an upper structure 5 at an upper portion is erected and inserted into a hole 3 filled with a filler 2 at a lower portion. After confirming the height, the pile 7 is lightly hit with the monoken 14 (see FIG. 2 (c)). Next, the pile core and the height of the pile head are checked, and the discharged earth or sand is directly mixed, or a mixture of the discharged earth and sand with a hardening agent such as cement, or an upper filler 33 such as crushed stone, gravel, sand, or the like is inserted into the hole 3. After being thrown into the upper part of the table, it is compacted (see FIG. 2 (d)). In this case, a dry filler is used as the upper filler 33.

Here, the concrete configuration of the pile 7 will be described based on the embodiment shown in FIG.
A concrete shoe portion which becomes the enlarged portion 4 is formed integrally with the lower steel pipe 20. The lower portion of the upper steel pipe 21 is fitted to the lower steel pipe 20 and connected by bolts 22 and nuts 23, and connected to the upper portion of the upper steel pipe 21. A metal plate member 28 serving as the means 6 is mounted so as to be vertically adjustable. The vertical dimension adjusting section 8 for adjusting the vertical position is formed by screwing a metal hanging cylinder 24, which is provided on the lower surface of a metal plate 28 serving as the connecting means 6, on the upper part of the upper steel pipe 21. It is. In the embodiment shown in FIG. 1, a female screw part 25 is provided on the upper part of the upper steel pipe 21, and a male screw part 26 is provided on the hanging cylinder 24, and these are screwed together so as to be able to be deep and shallow. By using different lengths of the upper steel pipe 21, the length of the pile 7 can be made different, and the level adjustment at the time of construction of the pile 7 is performed by the upper and lower dimension adjusting unit 8. In the figure, reference numeral 27 denotes a sleeve embedded in a concrete portion in the lower steel pipe 20.
It is inserted through the inside. Then, after adjusting the level of the connecting means 6 as described above, the plate material 28 serving as the connecting means 6 is adjusted.
The connecting plate 30 below the pillar 29 which is the upper structure 5
Are overlapped and connected by bolts 31 and nuts 32. Then, if necessary, concrete 37 may be cast at a position above the backfill material 33, and the upper steel pipe 21, the hanging cylinder 24, the connecting means 6, and the lower part of the column 29 may be buried to be integrated.

FIG. 3 shows another embodiment of the present invention. In this embodiment, the connecting means 6 also serves as the vertical stripe 10 of the foundation 9. That is, the enlarged portion 4 made of a metal plate is integrated with the lower part of the steel pipe 34 by welding, and the steel pipe 34 is filled with concrete 35 and concrete.
A pile 7 is formed by embedding a lower part of a reinforcing bar serving as a connecting means 6 in 35. Then, a hole 3 filled with a filler 2 such as soil cement or a soil cement mixed with soil hardener and earth and sand is drilled in the ground 1, and the hole 3 filled with the filler 2 is filled with the filler. The hole 7 having the above-mentioned structure is inserted when the material is in an uncured and wet state, and thereafter, a dry top filler 33 is charged into the upper part of the hole 3 and backfilled. In this case, the upper part of the steel pipe 34 is made to protrude above the upper filler 33. Thereafter, in order to use the reinforcing bar projecting upward as the connecting means 6 also as the vertical bar 10 of the foundation 9 to be formed later, a horizontal bar 36 is connected to this reinforcing bar to arrange the base 9, and then the concrete is struck. The upper structure 5 and the pile 7 are integrally connected via the vertical bar 10 which is the connection means 6 by forming the foundation 9 serving as the upper structure 5.
Here, the upper part of the steel pipe 34 is buried in the lower part of the foundation 9 so as to be more firmly integrated.

[Effects of the Invention] In the present invention, as described above, a hole filled with a soil hardener formed on the ground or a mixture of soil hardener and soil and sand is provided with an enlarged portion at a lower portion. And since the pile provided with the connection means with the upper structure in the upper part is inserted and the upper structure is connected to the connection means, the supporting force is increased by the enlarged part, and the pile having the enlarged part in the lower part is a soil hardening agent or It is integrated with the mixture of soil hardening and earth and sand to further increase the bearing capacity, and as a result, the pile can be shortened. Further, it can be easily connected to the upper structure using the connecting means provided on the upper part.

In addition, since the hole formed in the ground is filled with a soil hardener or a soil hardener and a mixture of soil and sand, which is wet before hardening, it is easy to fill a pile with an enlarged part at the bottom The work can be simplified because it can be inserted into the hole filled with material, and the top of the hole is filled with dry filling material. After that, the ground is compacted and becomes strong against the horizontal force acting on the pile top. By the way, in the foundation of lightweight buildings such as prefabricated buildings and prefabricated barns, there was nothing to strengthen and improve the periphery of the upper part of the pile,
According to the present invention, in the foundation of a lightweight building such as a prefabricated building, a prefabricated barn, the periphery of the upper part of the pile can be strengthened and improved,
This also makes the pile lighter and shorter.

In addition, by providing the vertical dimension adjusting section in the connecting means, it is possible to easily adjust the position of the connecting means at the upper end of the pile and to connect with the upper structure at an accurate position. It is not necessary to cut off the upper part.

Further, when the connecting means serves as the vertical streaks of the foundation, the connecting means also serves as the vertical streaks of the foundation, so that the work can be simplified and the number of members can be reduced.

[Brief description of the drawings]

FIG. 1 is a sectional view of the present invention, and FIGS. 2 (a), 2 (b) and 2 (c).
(D) is an explanatory view showing the construction order of piles, FIG. 3 is a cross-sectional view of another embodiment of the present invention, 1 is ground, 2 is a filler,
3 is a hole, 4 is an enlarged portion, 5 is an upper structure, 6 is a connecting means,
7 is a pile, 8 is a vertical dimension adjustment part, 9 is a foundation, 10 is a vertical line, 33
Is the top filling.

Claims (4)

(57) [Claims] A hole filled with a soil hardening agent formed on the ground or a filler obtained by mixing a soil hardening agent and earth and sand has an enlarged portion at a lower portion, and a connecting means for connecting to an upper structure at an upper portion. A connection structure between a pile and an upper structure, wherein the provided structure is inserted and the upper structure is connected to a connecting means. 2. A hole in which a soil hardening agent formed on the ground or a mixture of soil hardening agent and earth and sand before hardening is filled with a wet filler has an enlarged portion at a lower portion and an upper portion at an upper portion. 2. The connection structure between a pile and an upper structure according to claim 1, wherein a pile provided with a connection means for the structure is inserted, and the upper portion of the hole is filled with a dry upper filler. 3. A connection structure between a pile and an upper structure according to claim 1, wherein the connection means includes a vertical dimension adjusting portion. 4. A connection structure between a pile and an upper structure according to claim 1, wherein the connection means is a vertical streak of a foundation.