JP2001323479A - Foundation of structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To eliminate labor, time and costs to be constructed in a conventional foundation for driving foundation pile made of reinforced concrete and forming blocks made of reinforced concrete thereon. SOLUTION: A pile formed of twisted flat steel obtained by twisting flat steel is used in place of a conventional foundation pile. The twisted flat steel pile requires less labor, time and cost to be constructed because it can be placed upright by simply driving into the ground.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a foundation for a structure, on which the structure is built.

[0002]

2. Description of the Related Art As shown in FIG. 2, a conventional structural foundation is formed by digging a hole in the ground to make a reinforced concrete foundation pile (1).
0), crushed stones are laid on it,
Concrete is poured into the bottom foundation (2), on which a concrete block (3) with steel frames is made.

[0003]

As described above, the foundation of a conventional structure is a labor-intensive, time-consuming and costly work that uses a digging machine and a driving machine to drive a foundation pile.

[0004]

Therefore, in the present invention, a twisted flat steel (1) obtained by twisting a flat steel as shown in FIG. 1 is used instead of the conventional foundation pile. This twisted flat steel is a long flat steel that is twisted straight at the same pitch. The present applicant has developed a method and a machine for twisting the twisted flat steel first, and has already filed Japanese Patent Application No. 10-272512. Has been applied for a patent, and can be easily manufactured now. By screwing it into the ground and making a concrete block (3) with a steel frame on it, there is no need to dig or punch holes in the ground as in the past, so labor and time are saved. Less costly.

[0005]

[Operation] Here, the performances of the conventional foundation pile and the twisted flat steel pile are compared. First, when pulling out the conventional foundation pile driven into the ground, since only the frictional force between the peripheral surface of the foundation pile and the soil is applied, the foundation pile is pulled out with a certain force. On the other hand, when pulling out a twisted flat steel pile screwed into the ground, the spiral flat steel is screwed into the ground like a cork opener, so the twisted flat steel must be turned. If the ground does not break, it will not come out.

[0006] Since the same can be said at the time of pushing, it can be said that the pulling force and the pushing force of the pile are much larger in the twisted flat steel pile than in the conventional foundation pile. As described above, the twisted flat steel pile of the present invention has sufficient performance to replace the conventional foundation pile.

As shown in FIG. 3, the twisted flat steel pile can be used as a basis for a new type of structure.
First, four twisted flat bars (1a) are arranged at the corners of a square and screwed into the ground. Next, if the upper parts of the four twisted flat bars are connected and stopped by the frame (6), the foundation of the structure can be formed with this length. After that, a structure may be attached on this.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS First, as shown in FIG. 1, four torsion flat steel bars (1), both ends of which are cut, are arranged and screwed into the ground as shown in FIG. In this case, if a round bar is welded to the tip, it is convenient for positioning. Then, lay crushed stones on it, squeeze them, pour concrete to make the bottom foundation (2), build a steel frame on it, surround it with a frame, pour concrete into the frame,
Make a block (3) with an anchor bolt (4) at the top. To the anchor bolt of the foundation made in this way,
The structure was attached.

The torsion flat steel pile used as the foundation for supporting such a structure uses a flat steel having a width of 10 cm or more, and the screwing is performed by using a press-fitting or rotary-pressing civil engineering machine. Will be.

Next, an embodiment of the present invention will be described with reference to FIG.
As shown in the figure, a bolt (5) is first attached to the center of one end of the twisted flat bar (1a) by welding, and the other end is slightly pointed. Then, four twisted flat bars are arranged at the corners of the square on the ground and screwed. Separately, a frame (6) is made of angle steel, and four holes are drilled in the bottom in the same arrangement. This frame is placed on a torsion bar, bolts are passed through the holes, and the nuts (7) are used to complete the foundation.

An example in which a pillar is erected on this foundation will be described with reference to FIG. In this case, if a product having a pillar (9) standing on a plate (8) is made separately and mounted on a frame (6), the pillar can be easily placed.

If the foundation is placed at four corners and installed at four locations, a four-posted advertising tower can be erected on this foundation, and if it is installed side by side at several places, it can be connected to erect a fence. The range of use is extremely large.

As described above, the basis of the structure of the present invention is as follows.
The following effects are obtained. 1. Since the twisted flat steel pile of the present invention is simply screwed in to install the pile, it can be performed with no vibration and no noise as compared with the conventional pile driving work, and does not cause pollution. 2. It does not dig, backfill or move the soil, so it does not destroy the natural environment. 3. There is no need to dig, hammer or backfill the installation, just screw it in, so the work time can be greatly reduced and the construction cost is low.

[Brief description of the drawings]

FIG. 1 is a plan view and FIG. 1B is a front view of a foundation of a structure according to claim 1 of the present invention.

FIG. 2 (a) is a plan view and (b) is a basis of a conventional structure.
Is a front view.

3 (a) is a plan view and FIG. 3 (b) is a front view of the foundation of the structure according to claim 2 of the present invention.

FIG. 4 is a front view in which the foundation of the structure according to claim 2 of the present invention is used for a pillar.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1, 1a Twisted flat steel 2 Bottom foundation 3 Block 4 Anchor bolt 5 Bolt 6 Frame 7 Nut 8 Plate 9 Column 10 Foundation pile

Claims (2)

[Claims] [1] A plurality of torsion flat bars obtained by twisting flat bars are screwed into the ground, the upper portion of each torsion bar is fixed with a concrete block containing a steel frame, and an anchor bolt is provided at the upper portion. The basics of the structure. 2. The twisted flat bar according to claim 1, wherein a plurality of twisted flat bars are screwed into the ground, and the upper portions of the twisted flat bars are connected to each other by a frame. The foundation of the structure.