KR101196460B1 - Pile with wing typed shoe and pile construction method therewith - Google Patents

Abstract

PURPOSE: A pile with a rotary wing type shoe and a construction method thereof are provided to effectively insert a PHC pile to a desired depth even if a small amount of striking energy is applied. CONSTITUTION: A construction method of a pile with a rotary wing type shoe is as follows. A pile(200) with rotary wing type shoes(100) is set on the ground. The pile is rotated and inserted into the ground by vertically striking the head of the pile. The rotary wing type shoes are vertically inclined and face each other. One or more through holes(111) are formed in the rotary wing type shoes. [Reference numerals] (AA,BB,CC) Driving a pile; (DD,EE) Rotation; (FF) Discharge; (GG,II) Stirring; (HH) Target depth

Description

PILE WITH WING TYPED SHOE AND PILE CONSTRUCTION METHOD THEREWITH}

The present invention relates to a pile having a rotary wing type shoe and a construction method thereof. More specifically, in the pile for driving the head to penetrate the ground to improve the shoe installed on the tip of the pile, the pile having a rotary wing type shoe that can effectively rotate and penetrate the pile to the ground and its construction method It is about.

As shown in FIG. 1A, the PHC pile 10 is a kind of ready-made concrete pile, and is defined as a pretensioned spun high strength concrete pile in KS F 4306, and the concrete strength is higher than 800 kg /.

The tip shoe of the PHC pile, which is surrounded by the reinforcing band 11 around the tip end, may have various forms such as a Mamil shoe or a flat shoe.

Normally, PHC piles use the MAMILLA type, and when driving the PHM piles, the driving energy transmitted around the concave tip shoe is concentrated on the ground below the tip shoe. This is because the disturbance allows the PHC pile to be easily pushed onto the ground.

FIG. 1B shows an example of driving a PHC pile having a MAMIL type tip shoe.

First, when the PHC file is set by using the rudder on the ground, the PHC file is inserted into the ground by the driving force, and a predetermined depth (h1, h2) is inserted into the ground by the tip shoe.

That is, the ground of the bottom of the MAMILLA type tip shoe is disturbed by concentrating the driving energy in a fan shape, and the disturbed ground is guided into the hollow inside the PHC file, and the PHC file is inserted to a certain depth (h1, h2). .

The reaction force (R) is generated when driving the ground of the MILLILL type tip end surface, and this reaction force prevents the insertion of the PHC file. It can be seen that can proceed very efficiently.

However, the problem with using the tip shoe is that the head of the PHC file is damaged and many cracks occur in the head of the PHC file.

Therefore, such cracks and breaks should be applied to a smaller driving energy to reduce the frequency or number of formation. Such reduction of driving energy can be increased to the desired driving depth (target depth) by increasing the driving frequency of the PHC pile. As a result, there is a problem that the construction cost increases.

Therefore, there is also an example of the construction of the PHC pile by rotation rather than the driving method.

That is, the tip of the PHC pile is provided with a rotary tip shoe 20, as shown in Figure 1c to introduce an example of rotating the PHC pile 10 to the ground, such a rotary tip shoe 20 is a rotary drive means 30 is driven to rotate at the PHC pile tip.

The rotary tip shoe 20 is driven to rotate so that the PHC pile can be pressed into the ground.

The rotary tip shoe 20 is formed in a substantially conical shape whose cross-sectional area decreases toward the lower side, and a spiral protrusion 21 is formed on the outer circumferential surface thereof.

At this time, the coupling member 40 coupled to the rotary driving means 30 is protruded from the upper end of the rotary tip shoe 20.

The illustrated coupling member 40 has a cylindrical shape and is formed with a coupling groove to which the front end of the rotation driving means 30 is coupled.

However, since the rotary tip shoe 20 has to be rotated and press-fitted using the rotary driving means 30, the operation and economical efficiency of the equipment have to be reduced compared to the case of driving.

Therefore, the present invention can be installed to drive the PHC file, but even to apply a smaller driving energy can effectively install the PHC file to the desired depth (target depth) to solve the more economical PHC file and its construction method provided We assume problem to do.

According to an aspect of the present invention,

First, by increasing the penetration depth of the pile by one stroke, the pile construction efficiency can be improved.

To this end, two rotary wing type shoes are attached to the front end portion of the present invention. The rotary wing type shoes allow the pile to be effectively introduced into the disturbed ground by disturbing the lower ground when driving the head of the pile. It has a function.

Such a rotary wing type shoe can further expand the disturbance range of the lower ground, so that even a small driving energy enables effective ground press-in of the pile and minimizes cracks in the head during pile driving.

Secondly, the rotary wing type shoes face each other but are disposed to be inclined up and down with each other to rotate the rotary wing type shoe relative to the ground around the pile when driving the pile, thereby enabling effective pile construction by penetration of the pile. do.

To this end,

Two semi-circular rotary blades, which are disposed to face each other and are disposed to be inclined up and down and have an inner concave portion bent upward on the inner surface A for lower ground disturbance, for example, are formed at the tip of a centrifugal force high strength concrete pile (PHC pile). To form a rotary wing type shoe at the tip of the PHC pile, and at least one through-hole is formed in the semi-circular rotary wing,

It provides a pile and a construction method having a rotary wing type shoe that allows the PHC pile to be rotated and penetrated into the ground by the PHC pile head drive.

The scope of the present invention is shown by the following claims rather than the above description, and all changes or modifications derived from the meaning and scope of the claims and their equivalents should be construed as being included in the scope of the present invention. do.

When the pile according to the present invention is driven through the rotating wing-type shoe while driving, it is possible to construct a desired depth with less driving while effectively responding to the reaction force of the lower ground.

Since it is possible to infiltrate with less driving energy, it is possible to effectively control the head crack which is a problem during the driving, so that quality control such as head cutting and reconstruction of pile due to cracking is easy, and more efficient and economical pile construction is possible.

Figure 1a is an illustration of the tip shoe in the conventional PHC file,
Figure 1b is a state of action of the tip shoe in the conventional PHC pile,
Figure 1c is a sectional view of the installation of the conventional rotary press-fit PHC pile,
Figure 2 is a rotary wing type shoe and a functional diagram of the present invention,
3a and 3b is an exploded perspective view of the pile having a rotary wing type shoe of the present invention,
4a, 4b and 4c is a flow chart of the pile construction method having a rotary wing type shoe of the present invention.
Figure 5 is a construction cross-sectional view of the pile having a rotary wing type shoe of the present invention.

DETAILED DESCRIPTION Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art may easily implement the present invention. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. In the drawings, parts irrelevant to the description are omitted in order to clearly describe the present invention, and like reference numerals designate like parts throughout the specification.

[Rotary wing type shoe 100 of the present invention]

2 shows a functional diagram and a perspective view of the rotary wing type shoe 100 of the present invention.

First, according to Figure 2 it can be seen that the rotary wing type shoe 100 of the present invention is divided into two semi-circular rotary wing type shoes (100a, 100b).

At this time, it can be seen that each of the rotary wing type shoe 100 is formed with an inner concave portion 110 to serve as the tip shoe.

The inner concave portion 110 is to form a concave space upward on the inner surface (A) of the rotary wing type shoe 100, the inner concave portion 110 is driven when the PHC pile is driven on the lower ground To concentrate energy in the lower ground.

By forming the rotary wing type shoe 100 at the front end of the pile 200 can effectively form the lower ground stirring range and the lower ground disturbance effect is very large.

Accordingly, the rotary wing type shoe 100 is able to infiltrate the pile with less driving energy since the lower ground effect becomes very large.

The rotary wing type shoe 100 is to be set to face each other, but are arranged to be inclined up and down with each other, such that the top and bottom are arranged to be inclined as a whole, so that the ends of each other are set to overlap each other so that rotation by driving effectively made. Done.

That is, the rotary wing type shoe 100 is formed at the front end of the pile so that the rotary wing type shoe 100 is inclined vertically when the head is driven to rotate the pile slightly.

In other words, the rotary wing type shoe 100 is penetrated downwards at the time of driving, the rotary wing type shoe 100 is arranged in a spiral inclined up and down to slightly rotate the pile while being lodged on the ground.

In other words, the pile of the present invention is to be rotated and penetrated by the drive at the same time, it can be seen that the lower ground disturbance range by the rotary wing type shoe 100 is expanded.

In this case, at least one through hole 111 may be formed in the rotary wing shoe 100 of the present invention so that the ground disturbed through the through hole 111 may be discharged upward.

In addition, although one through-hole 111 may be formed in the ceiling of the inner recess 110, it may be formed in addition to the ceiling.

The rotary wing type shoe 100 may be installed on the reinforcement pipe 210 when the pile is a PHC pile, and may be installed on the outer circumferential surface of the steel pipe tip when the pile is a steel pipe.

[Installation example of the rotary wing type shoe 100 of the present invention]

3A and 3B show installation examples of the rotary wing type shoe 100 of the present invention.

First, FIG. 3A is an example in which the diameter D2 of the rotary wing type shoe 100 is substantially coincident with the diameter D1 of the PHC pile, and FIG. 3B is an example in which the diameter D1 of the PHC pile is larger than the diameter D1. It is shown.

First, according to FIG. 3a, the two rotary wing type shoes 100 are integrally formed with the reinforcement pipe 210 formed in advance at the distal end of the PHC pile, but face each other inwardly under the diameter of the PHC pile. It can be seen that it is formed to be viewed and inclined up and down to be arranged in a spiral form.

That is, it can be seen that the dog rotary wing type shoe 100 is formed on the inner bottom surface of the reinforcement pipe (210).

Accordingly, the inner concave portion of the rotary wing type shoe 100 can have a larger size than the concave portion of the conventional (MAMILLA) type shoe, which can increase the disturbance range of the lower ground during the driving, and repeats the driving. In this case, it can be seen that the PHC pile rotates slightly in a certain direction so that effective rotation and penetration construction can be achieved.

In addition, the rotary wing type shoe 100 has a through hole 111 is formed so that it can be seen that the disturbed lower ground is guided to the inside of the PHC pile through the through hole 111 to facilitate the discharge. .

Figure 3b is to make the diameter (D2) of the rotary wing type shoe 100 in particular larger than the diameter (D1) of the PHC pile, which can be an example of forming the rotary wing type shoe 100 on the outer surface of the reinforcement pipe. have.

In this case, since the disturbance range of the lower ground is very large, the rotation and penetration construction of the PHC pile with less driving energy is possible.

[Construction example of the rotary wing type shoe 100 of the present invention]

4A, 4B and 4C show the effect of the construction of the PHC pile 200 in which the rotary wing type shoe 100 of the present invention according to FIG. 3A is installed.

First, the pile 200 provided with the rotary wing type shoe 100 manufactured as shown in FIG. 4A is set in a hole in the ground previously formed at a predetermined depth, and a head drive of the pile 200 is prepared by preparing a driving machine (not shown). It is then prepared and set to the construction position of the pile on the ground through the initial drive.

Accordingly, when the head of the pile 200 is driven as shown in FIG. 4B, the pile 200 is inserted into the lower ground while having a predetermined depth h1.

In other words, the driving is to transmit the driving energy in the vertical direction, but the pile 200 is rotated by the rotary wing type shoe 100 and the lower ground disturbance is increased by the rotary wing type shoe, the construction of the pile 200 more easily This becomes possible.

Next, when the pile 200 is driven again as shown in FIG. 4C, the pile 200 may be rotated again and may be introduced into the lower ground, and the ground which is gradually disturbed may be induced into the hollow inside the pile 200.

In addition, it can be seen that the disturbed ground can be effectively discharged through the through hole 111 formed in the rotary wing type shoe.

Thus, when the driving of the file 200 is completed to the final target depth, it can be seen that the penetration depths h1 and h2 by one stroke are much larger than that of the conventional PHC file of FIG. 1B.

FIG. 5 illustrates that the grouting material injection hose 300 is inserted into the pile 200 after the pile 200 reaches the target depth, so that the ground is disturbed between the two semi-circular rotary wing shoes 100a and 100b. By installing

It can be seen that by injecting the grouting material through the injection hole to reinforce the lower ground, it is possible to ensure sufficient end support of the pile.

The grouting material injection hose is provided with a guide member 310 on the inner and outer sides of one side injection hose when the extension length is long, and by installing a guide magnet 320 so that the guide member can be easily connected to each other, the grouting material injection hose The construction of the connection is to facilitate.

100: rotary wing type shoe
110: inner recess
200: file 210: reinforcement pipe
300: grouting material injection hose 310: guide member
320: guide magnet

Claims (6)

Two semi-circular rotary blades (100a, 100b) are formed to face each other and are arranged to be inclined up and down, and formed on the inner surface A (110) bent upward on the inner surface (A) for lower ground disturbance. By forming the rotary wing type shoe 100 at the tip of the pile 200, the pile 200 is rotated by the head drive of the pile 200, so as to penetrate the ground,
The semi-circular rotary blades (100a, 100b) having a rotary wing type shoe, characterized in that at least one through-hole 111 is formed. delete The method of claim 1,
The rotary wing shoe 100 is integrally formed on the outer circumferential surface of the reinforcement pipe 210 is formed integrally with the front end portion of the pile 200, the inner back surface portion 110 of the rotary wing shoe 100 Pile having a rotor blade shoe, characterized in that the size is formed to be at least larger than the diameter (D1) of the pile. Setting a pile (200) having the rotary wing type shoe (100) of the ground; And
And driving the pile into the ground by rotating the head of the pile 200 in the vertical direction. delete The method of claim 4, wherein
The rotary wing type shoe (100) is a pile construction method having a rotary wing type shoe, characterized in that the grouting material is filled from the upper portion of the pile further comprises the step of injecting the grouting material into the disturbed ground.

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