KR20130075391A

KR20130075391A - Steel pipe pile module

Info

Publication number: KR20130075391A
Application number: KR1020110143744A
Authority: KR
Inventors: 이재익
Original assignee: 재단법인 포항산업과학연구원
Priority date: 2011-12-27
Filing date: 2011-12-27
Publication date: 2013-07-05

Abstract

PURPOSE: A steel pipe pile module is provided to improve a supporting force by integrally forming a supporting member in a second steel pipe and unfolding the supporting member through the fracture of a cut-out part while driving piles. CONSTITUTION: A steel pipe pile module (1) comprises a first steel pipe (10), a second steel pipe (20), and a supporting member (30). Both ends of the first steel pipe are opened. The first steel pipe is embedded into the ground. The second steel pipe surrounds the outer circumference of the first steel pipe. The lower side of the second steel pipe is embedded into the ground. The lower side of the second steel pipe comprises a plurality of cut-out parts (21) in the longitudinal direction. The supporting member is formed between the cut-out parts. The supporting member is horizontally unfolded while driving the first and second steel pipes by fracturing the cut-out parts using earth pressure.

Description

Steel Pipe Pile Module {STEEL PIPE PILE MODULE}

Embodiment of the present invention relates to a steel pipe pile module, and more particularly to a steel pipe pile module that can be embedded in the ground by the driving force during the construction of the structure.

Generally, types of piles can be classified into pipe-shaped steel pipe piles and cylindrical concrete piles depending on the material. In addition, steel piles in the form of beams may be used as necessary.

In recent years in the construction of buildings such as public facilities and harbor facilities, as the conditions for vertical and horizontal displacement of the structure become stricter, in order to satisfy these conditions, it is possible to increase the depth of initiation in the supporting layer as a basic form of the structure. Steel pipe piles with high resistance to loads and horizontal loads are widely used.

In addition, the construction method of the pile foundation is classified into a ready-made pile method of the method of making and using the piles, and a site-placed pile method of the method of curing the pile directly in the field.

The ready-made pile method can be divided into a driven pile method of a method in which a ready-made pile is directly driven into the ground and a buried-method method of digging a drilled hole in the ground and then buying a ready-made pile in the drilled hole.

These various construction methods are appropriately selected according to the situation of each construction site.

In addition, in general, the bearing capacity of the pile by the pile foundation refers to the size of the pile upper load that can be supported by the pile, it can be classified into the tip support and the main surface friction.

The tip bearing force refers to the bearing force expressed by the overall cross-sectional area of the tip of the pile, and the main surface friction means the frictional force generated by the contact between the main surface of the pile and the ground.

In general, in order to purchase steel pipe piles using the embedded pile method, an auger is used to excavate the ground.

After that, the steel pipe pile is embedded in the excavated ground accurately in the vertical direction, and cement paste is injected to fix the steel pipe pile.

Here, after the steel pipe pile is embedded, the bearing force of the steel pipe pile supported in the ground is greatly influenced by the tip bearing force determined by the effective cross-sectional area of the steel pipe pile tip.

Therefore, the effective area expansion of the tip end of the steel pipe pile is reflected as a very important design element in the steel pipe pile for the embedded pile method.

However, in the conventional technology as described above, there is a technique to improve the horizontal bearing capacity of the steel pipe by installing a pin on the upper portion of the steel pipe in a way to increase the horizontal bearing capacity of the steel pipe pile, this technology has a lot of difficulties in manufacturing, steel pipe and horizontal welds Has a problem in strength, and there is a limit to improving the horizontal support force.

In addition, this technology does not secure a vertical support force, because the need to proceed to the rock to secure the necessary vertical support force is also a problem that takes a lot of time.

Embodiment of the present invention is to provide a steel pipe pile module that can improve the horizontal and vertical bearing capacity for the ground while deformed itself by the earth pressure when embedded in the ground.

In one or more embodiments of the present invention, both ends are open and the first steel pipe which can be embedded in the ground, and the lower portion is wrapped in the ground surrounding the outer circumferential surface of the first steel pipe, the lower portion at a predetermined interval along the longitudinal direction A steel pipe pile module including a second steel pipe having a plurality of cutouts may be provided.

In addition, the second steel pipe is formed between each of the cut portions, and each of the cut portion is broken by the earth pressure acting between the first and second steel pipe when the first and second steel pipe to hit the ground horizontal A plurality of support members can be provided in a direction.

In addition, the support members may be deployed in the 360 ° direction on the ground.

In addition, the cutout may be made of a notch groove formed along the longitudinal direction.

In addition, the cutout may be made of a welding melting line formed along the longitudinal direction.

Steel pipe pile module according to an embodiment of the present invention is formed integrally with a plurality of support members in the lower portion of the second steel pipe spaced apart from the outer circumferential surface of the first steel pipe when driving each steel pipe on the ground, the cut portion by the earth pressure By breaking each support member in the horizontal direction through the fracture, it is possible to improve the horizontal and vertical bearing capacity of the steel pipe pile.

In addition, when the second steel pipe is hit on the ground, each support member is radially deployed with respect to the ground to distribute the horizontal support force, it is possible to smoothly distribute the force.

In addition, since the support member integrally formed in the lower portion of the second steel pipe is installed horizontally on the ground due to its own shape change due to earth pressure without installing the conventionally applied pin, the pin can be improved horizontally and vertically. It can improve workability and reduce manufacturing cost by deleting.

1 and 2 are perspective views of a steel pipe pile module according to an embodiment of the present invention.
3 is a front view of a steel pipe pile module according to an embodiment of the present invention.
4 is a cross-sectional view of the steel pipe pile module according to an embodiment of the present invention.

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 order to clearly illustrate the present invention, parts not related to the description are omitted, and the same or similar components are denoted by the same reference numerals throughout the specification.

It is to be understood that both the foregoing general description and the following detailed description of the present invention are exemplary and explanatory and are intended to provide further explanation of the invention as claimed. .

1 and 2 are perspective views of a steel pipe pile module according to an embodiment of the present invention.

1 and 2, the steel pipe pile module 1 according to an embodiment of the present invention is used as a method of laying and laying in the ground to reinforce the weak ground (3) when constructing various construction and civil engineering structures It is becoming.

Here, the steel pipe pile module (1) according to an embodiment of the present invention is made of a structure that can improve the horizontal and vertical bearing capacity in the ground by hitting the soft ground (3) during the construction and construction of civil engineering structures.

To this end, the steel pipe pile module 1 according to the embodiment of the present invention is configured to include a first steel pipe 10 and the second steel pipe 20, which will be described by configuration as follows.

In the above, the first steel pipe 10 may be formed in a pipe shape of a circular cross section which is open at both ends and may be embedded into the ground 3 by the driving force.

In the embodiment of the present invention, the second steel pipe 20 surrounds the outer circumferential surface of the first steel pipe 10 and the lower part is embedded in the ground 3 together with the first steel pipe 10, along the longitudinal direction thereunder. A plurality of cutouts 21 are provided at predetermined intervals.

In addition, the second steel pipe 20 is formed between the incisions 21, and when the first and second steel pipes 10 and 20 are driven to the ground 3, the first and second steel pipes 10 , 20 are provided with a plurality of support members 30 extending in the horizontal direction while each incision 21 breaks due to earth pressure acting between them.

As shown in FIG. 3, each of the supporting members 30 is embedded in the ground 3 and is developed in a 360 ° direction, which is radially developed with respect to the center of the second steel pipe 20, thereby supporting each supporting member. It is possible to disperse the horizontal bearing force at 30 so that the force is smoothly distributed.

On the other hand, the cutout portion 21 formed in the lower portion of the second steel pipe 20 is broken by earth pressure when being driven into the ground (3) and the support member 30 provided between each cutout 21 is It functions to develop in the horizontal direction.

In addition, the cutout 21 is connected to the lower end in the longitudinal direction along the circumferential direction at positions spaced apart from the second steel pipe 20.

For example, the cutout 21 may be made of a notch groove 23, as shown in FIG. 1, and the notch groove 23 may be formed in a groove shape through machining.

As another example, as shown in Figure 2, the cutout 21 may be made of a welding melting line 25, it may be formed in the form of heat affected by the welding.

Alternatively, the notch groove 23 is not formed in the longitudinal direction, but may be formed in the circumferential direction of the second steel pipe 20 in the form of a spiral (spiral), although not shown in the drawing.

That is, the steel pipe pile module 1 according to the embodiment of the present invention, as shown in Figures 3 and 4, the first steel pipe 10 is first embedded in the ground (3), the first steel pipe 10 In the center, the second steel pipe 20 is driven at a position spaced apart from the outer circumferential surface of the first steel pipe 10 and embedded in the ground 3.

Here, when the second steel pipe 20 is driven while the lower end is in contact with the ground (3), each inlet portion 21 formed at the bottom acts the earth pressure due to the driving force between the steel pipe (10, 20) While being broken, each support member 30 formed between each cutout 21 is radially developed horizontally with respect to the ground 3 (see FIG. 3).

After the installation as described above, as shown in Figure 4, in order to fix each steel pipe (10, 20) to the ground (3) is injected concrete (C) between the first steel pipe 10 and the second steel pipe (20) The work is finished by integrating the first steel pipe 10 and the second steel pipe 20.

Therefore, the support member 30 is broken by each incision 21 by the earth pressure and radially deployed with respect to the ground 3, thereby improving the horizontal and vertical support force of the entire steel pipe pile module (1). .

As described above, the steel pipe pile module 1 according to the embodiment of the present invention has a plurality of support members 30 in the lower portion of the second steel pipe 20 which is installed on the outer circumferential surface of the first steel pipe 10. When integrally formed and driving each steel pipe 10, 20 to the ground 3, each support member 30 is developed in the horizontal direction on the ground 3 through the breakage of the incision 21 by earth pressure To improve the horizontal and vertical bearing capacity of steel pipe piles.

In addition, when the second steel pipe 20 is driven on the ground 3, each support member 30 is radially deployed with respect to the ground 3, so that the horizontal support force can be dispersed, thereby smoothing the dispersion of the force. Can be.

In addition, the support member 30 formed integrally with the lower part of the second steel pipe 20 is horizontally deployed on the ground 3 due to its own shape change due to earth pressure, without installing the pins that are conventionally applied. Since the vertical bearing capacity can be improved, workability can be improved and manufacturing cost can be reduced by removing pins.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, Of course.

1 ... steel pile pile module 3 ... ground
10 ... 1st steel pipe 20 ... 2nd steel pipe
21 ... incision 23 ... notch groove
25.Welding melting line 30.Support member
C ... concrete

Claims

In the steel pipe pile module,
A first steel pipe which is open at both ends and can be embedded in the ground; And
A second steel pipe surrounding the outer circumferential surface of the first steel pipe and having a lower portion embedded in the ground, and having a plurality of cutouts at predetermined intervals along the longitudinal direction thereof
Steel pipe pile module comprising a.

The method according to claim 1,
In the second steel pipe,
A plurality of supports formed between the cutouts, the plurality of cutouts being horizontally developed while breaking the cutouts by earth pressure acting between the first and second steel pipes when driving the first and second steel pipes on the ground; Steel pipe pile module is provided with a member.

The method according to claim 1,
Each support member is steel pipe pile module deployed in the 360 ° direction on the ground.

The method according to claim 1,
The cutout is a steel pipe pile module consisting of a notch groove formed along the longitudinal direction.

The method according to claim 1,
The cutout is a steel pipe pile module consisting of a welding melting line formed along the longitudinal direction.