KR20120113646A

KR20120113646A - Extended pile

Info

Publication number: KR20120113646A
Application number: KR1020110063879A
Authority: KR
Inventors: 이대동
Original assignee: 이대동
Priority date: 2011-04-05
Filing date: 2011-06-29
Publication date: 2012-10-15

Abstract

PURPOSE: A pile with an extended head is provided to enable stable construction by preventing an extension member from touching the inner surface of a borehole. CONSTITUTION: A pile with an extended head comprises a pile body(100), an intermediate member(200), multiple extension members(300), a vertical guide(400), a center member(500), a stopper member(700), and a downward movement restriction member(600). The pile body is buried in the ground. The intermediate member is coupled to the bottom end of the main body and has a stopper member through hole(220). The extension members are extendable from the intermediate member. The vertical guide couples the extension members to the intermediate member and guides the extension of the extension members. The center member extends the extension members outward. The stopper member is formed on the top of the center member and has a head portion(710). The downward movement restriction member restricts the downward movement of the stopper member.

Description

Extension File {EXTENDED PILE}

Field of the Invention [0002] The present invention relates to a civil engineering field, and more particularly, to a file structure.

A pile is a basic structure that is constructed to transmit a load of an upper structure to the ground, and is generally designed as a compression member under the assumption that only a compressive force is applied.

Recently, in order to increase the tip bearing capacity of the pile, research and construction on the tip-extended pile that combines the expansion plate having a larger width than the width of the pile has been actively conducted.

Such conventional tip-extended piles generally take a method of coupling the extension plate 20 made of steel or the like to the bottom of the pile body 10 (FIG. 1).

By the way, the conventional tip-extended pile had the following problems because it must be inserted into the drilling hole in the state that the expansion plate 20 is coupled to the bottom of the main body 10.

First, the drilling diameter (inner diameter of the drilling hole) should be larger than the general pile, which leads to an increase in construction cost and period.

Second, in the case of inserting the tip-extension pile in a state where the drilling diameter is not sufficiently secured, the inner surface of the drilling hole and the expansion plate are in contact with each other, which makes the operation difficult and the breakage of the expansion plate is likely to occur.

The present invention has been derived to solve the above problems, it is possible to reduce the construction cost and period by inserting the file even if the drilling diameter is small, and stable construction by preventing the inner surface of the drilling hole and the contact of the expansion member It is possible, and the object of the present invention is to present a tip-extended pile that can obtain a larger tip bearing capacity than conventional in the drill holes of the same diameter.

In order to solve the above problems, the present invention is a pile main body formed to be buried underground; An intermediate member 200 coupled to the lower end of the main body 100; A plurality of expansion members (300) installed to allow radial expansion driving to the outside with respect to the intermediate member (200); A longitudinal guide part 400 coupled to the intermediate member 200 and the plurality of expansion members 300 and configured to guide radial expansion driving of the plurality of expansion members 300; And a central member 500 installed to expand and drive the plurality of expansion members 300 to the outside by pushing the inner end of the expansion member 300 to the outside while driving upwardly in contact with the bottom surface of the drilling hole. A stopper member 700 having a head 710 formed at an upper end thereof protrudes from an upper side of the central member 500, and a stopper member through hole through which the stopper member 700 penetrates the intermediate member 200. 220 is formed along the up and down direction, the stopper member through-hole 220 is a front end characterized in that the downward drive limiting member 600 is installed to allow only the upward drive of the stopper member 700 and to limit the downward drive Present an extensible file.

The stopper member through-hole 620 is formed so that the width is gradually narrowed from the upper side to the lower side, the downward drive limiting member 600 is coupled to each other so as to surround the body portion of the stopper member 700 a plurality of wedges It is preferable to include the member 610.

The downward drive limiting member 600 may further include a spring 620 mounted to widen the gap between the head portion 710 and the wedge member 720.

The longitudinal guide portion 400 is formed in a radial structure toward the outside on the bottom surface of the intermediate member 200, a plurality of longitudinal guide grooves 410 formed in a narrow width of the lower side than the upper side; It is preferable to include; longitudinal guide protrusion 420 is formed to protrude on the upper surface of the expansion member 300 to be inserted into the longitudinal guide groove 410, the lower width of the lower side than the upper side is formed; Do.

The longitudinal guide portion 400 is formed in a radial structure toward the outside on the upper surface of the expansion member 300, and a plurality of longitudinal guide grooves 410 formed to have a lower width than the upper side; It is preferable to include; longitudinal guide protrusions 420 protruded to the bottom of the intermediate member 200 to be inserted into the longitudinal guide grooves 410 and formed to have a lower width than the upper side thereof. Do.

The central member 500 has a longitudinal cross-section is formed in a polygonal structure, the cross section is formed in a trapezoidal structure having a wider width of the lower side than the upper side, the inner end of the expansion member 300 is a cross section of the central member 500 It is preferably formed in an inclined structure corresponding to the outer surface, the inner surface of the expansion member 300 and the outer surface of the central member 500 is preferably formed to be in flat contact with each other.

The longitudinal section of the expansion member 300 is preferably formed in a fan shape.

The intermediate member 200 is preferably a disk-shaped structure corresponding to the longitudinal section of the main body 100.

The outer diameter of the intermediate member 200 is larger than the outer diameter of the main body 100, the outer diameter in the expanded state of the plurality of expansion member 300 is formed larger than the outer diameter of the intermediate member 200 It is preferable.

It is preferable that the center member insertion groove 230 is formed at the center of the bottom surface of the intermediate member 200 so that the top of the center member 500 is inserted.

The present invention is possible to reduce the construction cost and period by inserting the file even if the drilling diameter is small, and stable construction is possible by preventing the inner surface of the drilling hole and the expansion member, and compared to the conventional in the drill hole of the same diameter An extended tip file is provided to obtain greater tip bearing capacity.

1 is a block diagram of a conventional tip extended file.
2 shows an embodiment of the present invention,
2 is a sectional view of a first use state of the first embodiment of the pile;
3 is a sectional view of a second use state of the first embodiment of the pile;
4 is a perspective view of a first use state of the first embodiment of the pile;
5 is a perspective view of a second use state of the first embodiment of the pile;
6 is a bottom view of a first use state of the first embodiment of the pile;
Fig. 7 is a bottom view of a second use state of the first embodiment of a pile.
8 is a perspective view of a first embodiment of a central member;
9 is a perspective view of a first embodiment of an expansion member;
10 is a perspective view of a first embodiment of an intermediate member;
11 is a sectional view of the first embodiment of the longitudinal guide portion and the expansion drive restriction portion;
12 is a sectional view of a second embodiment of the longitudinal guide portion and the expansion drive restriction portion;
Figure 13 is a perspective view of the wedge member.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

As shown in FIG. 2 or below, the tip-extended pile according to the present invention basically includes a pile main body 100 formed to be buried in the ground; An intermediate member 200 coupled to the lower end of the main body 100; A plurality of expansion members 300 installed to allow radial expansion driving to the outside with respect to the intermediate member 200; A longitudinal guide part 400 coupled to the intermediate member 200 and the plurality of expansion members 300 and configured to guide the radial expansion driving of the plurality of expansion members 300; And a central member 500 installed to expand and drive the plurality of expansion members 300 to the outside by pushing the inner end of the expansion member 300 outward while driving upwardly in contact with the bottom surface of the drilling hole. .

That is, instead of using a fixed plate having a fixed structure as in the related art, by using a plurality of extension members 300 which are guided by the guide member 200 and can be driven in and out, a plurality of files are inserted into the drilled hole. 2, 4, and 6 so that the expansion member 300 of the inner side is folded inwardly, the plurality of expansion members 300 protrude outward by the action of the central member 500 to reach the bottom surface of the drilling hole It is driven to be in an extended state (Figs. 3, 5, 7).

Therefore, the following effects can be obtained.

First, even if the drilling diameter (the inner diameter of the drilling hole) is not made larger than the general pile, the insertion work for the drilling hole is possible, thereby reducing the construction cost and period.

Second, since the expansion member is in a folded state during the insertion of the file to the drilling hole, it is possible to prevent the inner surface of the drilling hole and the contact of the expansion member, the operation is easy and can prevent the expansion member from being damaged.

Third, since the file can be inserted into the drilled hole, the tip extension structure can be formed later by the expansion of the expansion member, and thus, a larger tip bearing force can be obtained in the drilled hole of the same diameter as compared with the conventional one.

However, when the tip-extension pile of the above-described structure is inserted into the drilling hole and driven from the top, the central member 500 vibrates up and down by the impact, and the vertical vibration is the central member 500 and the intermediate member. Problems such as breakage and separation of the 200 and the like can be caused.

In order to prevent this, a stopper member 700 having a head 710 formed at an upper end of the central member 500 protrudes, and a stopper member through hole through which the stopper member 700 penetrates the intermediate member 200. 220 is formed along the up and down direction, it is preferable that the stopper member through-hole 220 has a configuration in which a downward drive limiting member 600 is provided, which permits only upward driving of the stopper member 700 and restricts downward driving. .

In this configuration, even when the tip-extended pile is inserted into the punching hole and driven from the top, the central member 500 only moves upward, so that the central member 500 and the intermediate member 200 are subjected to the vibration as described above. This can prevent problems such as breakage and separation.

Specifically, the stopper member through-hole 620 is formed so that the width becomes narrower gradually from the upper side to the lower side, the downward drive limiting member 600 is mutually by the rubber ring 611 or the like to surround the body of the stopper member 700 It may take a configuration including a plurality of wedge member (610: cone) mounted in combination (Figs. 2, 3, 13).

In this case, the plurality of wedge members 610 coupled by the rubber ring 611 or the like allows the upward movement of the stopper member 700, but the downward movement is limited by the wedge action, so that it is coupled with the stopper member 700. To prevent the downward movement of the central member (500).

Furthermore, when the spring 620 is provided between the head portion 710 and the wedge member 720 to increase the mutual spacing, the upward movement of the stopper member 700 and the central member 500 may be induced more stably. The advantage is that it can be added (Figure 3).

The longitudinal guide part 400 combines the intermediate member 200 and the plurality of expansion members 300, and simultaneously serves to guide radial expansion driving of the plurality of expansion members 300. Hereinafter, two exemplary embodiments will be described.

First, the longitudinal guide portion 400, a plurality of longitudinal guide grooves 410 formed in a radial structure toward the outside on the bottom surface of the intermediate member 200, the width of the lower side is narrower than the upper side; It is inserted into the longitudinal guide groove 410, so as to protrude on the upper surface of the expansion member 300, the longitudinal guide projections 420 formed in a narrow width of the lower side than the upper side; implemented by a configuration comprising a 2 to 7, FIG. 11.

Second, the longitudinal guide portion 400 is opposite to the above, a plurality of longitudinal guide grooves 410 formed radially outward on the upper surface of the expansion member 300, the width of the lower side is wider than the upper side; Implemented by the configuration including; longitudinal guide groove 420 is inserted into the longitudinal guide groove 410, protruded to the bottom surface of the intermediate member 200, and formed in a wider width of the lower side than the upper side; May be (FIG. 12).

On the other hand, in order to push the expansion member 300 outward by raising the center member 500, the cross section of these contact surfaces (inner surface of the expansion member 300 and outer surface of the central member 500) is inclined. When the contact surface takes a curved structure such as a cylindrical pile, the above-described extension of the expansion member 300 does not occur smoothly because the radius of curvature of the upper and lower portions are different.

When both the inner surface of the expansion member 300 and the outer surface of the central member 500 are formed flat, the effect of causing the expansion driving of the expansion member 300 to occur smoothly by the rise of the central member 500. (FIG. 8, 9).

Specifically, for this purpose, the central member 500 is formed in a polygonal structure (triangular, square, hexagonal, etc.) longitudinal section, the cross-section is formed in a trapezoidal structure with a wider width of the lower side than the upper side (Fig. 8).

That is, when the longitudinal section of the central member 500 has a circular structure, the outer surface is curved, which causes the above-described problem, so that the longitudinal section has a polygonal structure so that all outer surfaces are formed flat.

The inner end of the expansion member 300 is formed in an inclined structure whose cross section corresponds to the outer surface of the central member 500 described above, and the inner surface is formed flat as the outer surface of the central member 500 (FIG. 9). ).

The longitudinal section of the expansion member 300 is preferably formed in a fan-like structure in which the outer end forms an arc, so that the plurality of expansion members 300 take the shape of a disk as a whole.

The intermediate member 200 has a structure in which a plurality of expansion members 300 and a central member 500 are installed at a lower portion thereof, and the intermediate member 200 may be any structure that is mounted on the lower end of the pile main body 100, but the main body 100 has a cylindrical structure. It is preferable to take a disk-shaped structure so as to correspond to the longitudinal section thereof in terms of structural stability.

The outer diameter of the intermediate member 600 may be the same as the outer diameter of the main body 100, the outer diameter of the intermediate member 600 is formed larger than the outer diameter of the main body 100, and further a plurality of expansion member 300 When the outer diameter in the unfolded state takes a configuration formed larger than the outer diameter of the intermediate member 600, the advantage that it can achieve a wider tip extension structure stably (Figs. 2 to 7).

When the central member insertion groove 230 is formed such that the upper end of the central member 500 is inserted into the central portion of the bottom surface of the intermediate member 200, the intermediate member 200 is stably in the state where the central member 500 finishes the driving operation. Since it can be fixed in, it is preferable in terms of structural stability (Fig. 2, 10).

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the invention as defined in the appended claims. It is to be understood that both the technical idea and the technical spirit of the invention are included in the scope of the present invention.

100: main body 200: intermediate member
220: stopper member through hole 230: center member insertion groove
300: expansion member 400: longitudinal guide portion
410: longitudinal guide groove 420: longitudinal guide protrusion
500: center member 600: downward drive limiting member
610: wedge member 620: spring
700: stopper member 710: head

Claims

A pile main body 100 formed to be buried in the ground;
An intermediate member 200 coupled to the lower end of the main body 100;
A plurality of expansion members (300) installed to allow radial expansion driving to the outside with respect to the intermediate member (200);
A longitudinal guide part 400 coupled to the intermediate member 200 and the plurality of expansion members 300 and configured to guide radial expansion driving of the plurality of expansion members 300;
And a center member 500 installed to expand and drive the plurality of expansion members 300 to the outside by pushing the inner end of the expansion member 300 outward while driving upwardly in contact with the bottom surface of the drilling hole. ,
On the upper side of the central member 500, a stopper member 700 having a head portion 710 formed at the top is protruded,
A stopper member through hole 220 through which the stopper member 700 penetrates is formed in the intermediate member 200 along a vertical direction.
The stopper member through-hole 220 is a front end extension type file, characterized in that the downward drive limiting member 600 is installed to allow only the upward drive of the stopper member 700 and limit the downward drive.

The method of claim 1,
The stopper member through-hole 620 is formed to become narrower gradually from the upper side to the lower side,
The downward drive limiting member 600 is
Tip-extension pile, characterized in that it comprises a plurality of wedge members 610 are coupled to each other to surround the body portion of the stopper member 700.

The method of claim 2,
The downward drive limiting member 600 is
And a spring (620) mounted to widen the gap between the head portion (710) and the wedge member (720).

The method of claim 1,
The longitudinal guide portion 400
A plurality of longitudinal guide grooves 410 formed on a bottom surface of the intermediate member 200 toward the outside and formed to have a lower width than an upper side thereof;
A longitudinal guide protrusion 420 formed on the upper surface of the expansion member 300 so as to be inserted into and guided in the longitudinal guide groove 410 and having a lower width than the upper side thereof;
Extended file type, characterized in that it comprises a.

The method of claim 1,
The longitudinal guide portion 400
A plurality of longitudinal guide grooves 410 formed radially outward on the upper surface of the expansion member 300 and having a lower width than the upper side;
A longitudinal guide protrusion 420 formed on the bottom surface of the intermediate member 200 so as to be inserted into the longitudinal guide groove 410 and guided, and having a lower width than the upper side thereof;
Extended file type, characterized in that it comprises a.

The method of claim 1,
The central member 500 is a longitudinal cross-section is formed in a polygonal structure, the cross section is formed in a trapezoidal structure having a wider width of the lower side than the upper side,
The inner end of the expansion member 300 is formed in an inclined structure whose cross section corresponds to the outer surface of the central member 500,
An inner side surface of the expansion member 300 and the outer side surface of the central member 500 is a front end extension file, characterized in that formed in a flat surface contact with each other.

The method of claim 1,
Longitudinal extension file, characterized in that the longitudinal section of the expansion member 300 is formed in a fan shape.

The method of claim 1,
The intermediate member (200) is a tip-extended pile, characterized in that the disk-shaped structure corresponding to the longitudinal section of the main body (100).

The method of claim 1,
The outer diameter of the intermediate member 200 is larger than the outer diameter of the main body 100, the outer diameter in the expanded state of the plurality of expansion member 300 is formed larger than the outer diameter of the intermediate member 200 Extended file type, characterized in that.

The method of claim 1,
A front end extended file, characterized in that the central member insertion groove 230 is formed in the center of the bottom surface of the intermediate member 200 so that the upper end of the central member 500 is inserted.