KR100396855B1 - Fabrication method of preflex pile using axial load - Google Patents

Abstract

Welding plates at both ends of the H-beam; Applying a tensile force in the axial direction at both ends of the H-beam; Coating concrete on the shear surface of the H-beam; Removing the axial tensile force applied thereto; Removing the plate welded to both ends of the; Method of manufacturing a preflex pile using an axial load consisting of

Description

Fabrication method of preflex pile using axial load {.}

The pile ensures that the loads acting on the superstructure and undercarriage are reliably transferred to the ground and are not mechanically stable and at the same time free of harmful displacements. However, in the conventional pile, the lateral displacement is caused by the lateral load or the earthquake, and the bearing capacity is weakened in some cases. In addition, since a large number of piles are required to secure sufficient bearing capacity, considerable construction costs are required.

The present invention relates to a construction method for manufacturing a preflex pile using a load in the axial direction, and in the prior art, the production of a "preflex pile and a pillar" of Korean Patent Publication No. 049711 (hereinafter referred to as "quoting citation"). Process ".

1 shows a process for producing a preplex file of the present invention.

In order to produce piles and columns with uniform compressive stress in all sections of concrete, dummy H-beams 1 are connected with bolts (see Figure 1a). A load is applied (see FIG. 1B), the concrete 3 is coated on the rigid tension flange, and then a compressive force is introduced to the coated concrete by removing the load (see [FIG. 1C] and [FIG. 1D]). The next step is to repeat the above process to coat the concrete with the opposite rigid flange and to introduce a compressive force.

However, the above-mentioned cited invention has a disadvantage in that it is very difficult to maintain the uprightness of the pile when the final preflex pile is completed because a load in the vertical direction is applied to the steel in order to manufacture the preflex pile.

The present invention has been devised for the purpose of solving the above-mentioned disadvantages of the prior art, and in order to achieve this purpose by applying the load in the axial direction using a device capable of applying a load in the axial direction of the conventional H-shaped steel of the H-shaped steel Cover the shear surface with concrete and remove the load.

1 is a state diagram showing a method for producing a preplex file of the cited invention.

FIG. 2 is a state diagram showing a manufacturing method of a preflex pile using an axial load according to the present invention, in which FIG. 2a is a state diagram in which plates are welded to both ends of an H-beam, and FIG. Figure 2c is a state diagram for generating a tensile force in the direction, [Fig. 2c] is a state diagram for coating the concrete on the shear surface of the H-beam in a state in which the tensile force is applied in the axial direction and remove the tensile force [Fig. After removal, the completed preplex file is shown.

<Description of Main Parts of Drawing>

1. Dummy H section steel 2. Bolt

3. Concrete coated with H-beams 4. H-beams

5. Plate

The manufacturing method of the present invention is devised to solve the problems of the cited inventions listed above, and the manufacturing process thereof will be described with reference to the drawings.

FIG. 2 is a flow chart showing a manufacturing method of a preflex pile using an axial load of the present invention. The plates 5 are welded to both ends of the H-shaped steel 4 to be connected to a mechanical device to which an axial tensile force is applied. (See [FIG. 2A]). 2b is a state diagram in which a tensile force is generated in the H-beams by applying a load until the allowable tensile stress of the H-beams is reached in the axial direction after connecting to a mechanical device. The next step is to coat the concrete (3) on the shear surface of the H-beam and remove the tensile force generated (see Figure 2c). Then, the compressive force is introduced to the concrete coated on the shear surface, and then the When the plate 5 welded to both ends is removed, the preflex pile (refer FIG. 2D) using the axial load of this invention is completed.

In order to improve the problems of the existing pile, the present invention is to cover the concrete of the H-beam and to introduce the prestressed compressive stress over the shear surface to improve the bending stiffness to resist the lateral load and seismic force and to prevent corrosion, and Due to the increase in the main frictional force due to the cross-sectional shape of the mold, it can be expected to increase the bearing capacity, and due to the large stiffness, the required bearing capacity can be obtained with a much smaller number of piles compared to the existing piles. The disadvantage can improve the disadvantage of maintaining the upright of the file.

Claims (1)

Welding plates at both ends of the H-beam; Applying a tensile force in the axial direction at both ends of the H-beam; Coating concrete on the shear surface of the H-beam; Removing the axial tensile force applied thereto; Removing plates welded to both ends of the plates; Fabrication method of preflex pile using axial load