KR0121639Y1 - Anchoring pile structure - Google Patents

Abstract

[purpose]

It is to provide an anchor file equipped with an anchor that can strengthen the tip bearing capacity of the PC file.

[Configuration]

A vertical shaft is mounted on the tip of a conventional PC file for SIP by mounting an anchor (2) consisting of a shoe (3), a mesh (5), and a band (4) from the tip extending in the centrifugal direction by the inertia when it is struck. When the inserted file is struck, the mesh 5 of the anchor 2 is opened in the shape of a main egg to form an anchor for the tip of the file.

Description

Anchor file

1 is a perspective view of the anchor pile according to the present invention

2 is a cross-sectional view taken along the line A-A of FIG.

3 is a cross-sectional view of the anchor changed after the beating

4 is a cross-sectional view of the pile after construction of the anchor pile

* Explanation of symbols for main parts of the drawings

1: File 2: Anchor

3: shoe 4: band

5: manche 6: stomach

7: belly 8, 9.10: pin

11,12: Brace

The present invention relates to the improvement of the anchor file, and in particular, simply to wear on the tip of the PC pile to fulfill the expansion anchor chamber faithfully only by the driving pressure, and to provide an anchor file in which the expansion anchor is not reduced even in the external pressure.

One of the anchor file methods is the SIP method. The SIP method is preferred to be used as the most basic pile construction in large cities because of the advantages of reducing the number of civil complaints. have.

Since ordinary anchor piles are extremely simple round columns with uniform thickness from the end to the rear, they have no choice but to expect the tip bearing capacity only in the cross-sectional area of the pile. In practice, there is a lack of tip bearing capacity of piles embedded in vertical shafts drilled with auger drills. Is raised. For example, there are side effects such as building falling down and unequal settlement. In this regard, if the SIP method is applied, more thorough quality control and measures to increase the support capacity are urgently needed.

As proposals for increasing the tip bearing capacity of anchor piles, there are Japanese Patent Laid-Open Nos. Hei 1-29520 and especially Hei 2-225714. The former prior art is to insert an inner casing with an excavation bit and a dilator blade in the protrusion into an outer casing with a spiral blade on the outer circumference, and the dilator blade must deliberately lift and lift the diameter rod inserted into the inner casing from the ground. The structure is designed to be embedded in the shaft, which is not suitable for a non-casing pile that can be used to insert a diameter rod, and the structure is complicated, making manufacturing difficult and expensive.

The latter prior art connects the pile body to the flooring shoe with a pile connection, loads a flexible tube to the bottom of the gang, simultaneously pumps a volume of liquid equal to the pile body out of the excavation gang by pumping, and casts concrete to the pile body. Hang the pile body to the crane to enlarge the floor enlargement, discharge the concrete into the flexible tube, and swing the pile body up and down to fill the concrete outside the pile body near the harbor, It enables lightweight piles to be constructed and is far from concrete anchor piles made of PC steel bars and cannot be applied.

Moreover, in the prior art, the anchoring force is expanded only by the driving pressure of the pile, so that it is weak to the external pressure acting in the center direction from the main surface side after being enlarged, so that when the concrete is poured later or before the concrete is hardened, it tends to be reduced. There was no choice but to halve the effect of the intended diameter anchor.

It is an object of the present invention to provide an anchor pile in which the diameter anchor anchor is faithfully fulfilled only by the driving pressure of the pile and the diameter anchor is not reduced even in the external pressure.

That is, the present invention changes the shape of the lozenge into a hollow cross section wider than the cross-sectional area of the pile when the pile is inserted into the vertical shaft. Thus, when the cement paste poured between the shaft and the pile-gang wall flows in and hardens, the anchor hole is sufficiently formed. When the anchor can be mounted on the tip of the existing PC pile, it is formed into a rhombus shape by the driving pressure, and the tip bearing force is increased by being embedded in the main surface of the shaft.

Hereinafter, the present invention will be described in detail according to the accompanying drawings prepared based on the preferred embodiments. In FIG. 1 and FIG. 2, the anchor 2 is attached to the tip of the pile 1 made of PC. The tip of the anchor 2 is a shoe 3, and the rear end of the anchor 2 is a band 4 so as to be easily fitted to the tip of the pile 1. The bottom of the band 4 is blocked so that it is overhanging the tip surface of the pile 1.

In addition, the intermediate part located between the shoe 3 and the band 4 is set to the mesh 5. In this mesh 5, the flesh is divided into the upper arm 6 and the lower arm 7 and the points where they meet are connected by pins 8. Alternatively, the points where the upper end of the upper arm 6 and the bottom circumference of the band 4 meet each other and the lower end of the lower arm 7 and the upper circumference of the shoe 3 meet each other are individually pins 9, 10).

And the upper end of the shoe (3) and the bottom of the band (4) is provided with umbrella-shaped braces (11, 12) spread in a V-shaped or S-shape while the free ends of each of the braces (11, 12) It is connected to the pin (8) connecting the upper arm (6) and the lower arm (7).

Insert this anchor file into the vertical shaft and hit it and it will look like Figure 3. The process of doing this is as follows. When the pile 1 is struck, the inertia affects the anchor 12 vertically.

That is, the force is transmitted to the edge of the shoe (3) through the band (4) → upper arm (6) → lower arm (7), at the same time the band (4) → upper brace (12) → lower brace (11) Is transmitted to the upper surface of the innermost shoe (3).

In this way, when the inertia reaches the shoe 3, resistance is necessarily generated. In other words, the tip of the shoe 3 and the circumference of the inclined surface are subject to resistance from the gangster corresponding to the inertia. As the impact force and the resistance force are conflicted, the connection point by each pin 8, 9, 10 and the root portion b of the brace 1112 are opened at the same time in the centrifugal direction almost like a main grain.

In this way, the upper arm (6) and the lower arm (7) is open because the brace (11, 12) is held from the inside, the strength as a wide-angle anchor is large. When the cement paste is installed around the rigidly expanded anchor (2) and solidified, the anchor (2) doubles as a reinforcing bar and serves as an anchor for strong reinforced concrete. As a result, the construction effect of the sturdy foundation pile can be obtained.

Claims (1)

When the vertical pressure is applied to the center of the band (4) to be covered at the tip of the anchor pile forms a brace 12 that opens in the shape of a zigzag, and when the vertical pressure is applied to the center of the upper surface of the shoe (3) to the brace 12 Correspondingly forming a v-shaped brace (11), the lower body of the upper arm (6) and the lower body (5) connecting the upper end of the lower body (7) with a pin (8) and the bottom of the band (4) The upper surface of the shoe 3 is sandwiched between the upper surface of the shoe 3 and the upper end of the upper arm 6 is pin 9 at the bottom edge of the band 4 and the lower end of the lower body 7 is pin 10 at the upper edge of the shoe 3. Anchor piles wearing anchors (2) hinged by).