KR100998882B1 - Phc pile structure having an anchor for preventing buoyancy - Google Patents

Abstract

PURPOSE: A PHC pile structure with a buoyancy preventing anchor is provided to efficiently prevent the buoyancy of a building by the increment of frictional force with soil inside the ground. CONSTITUTION: A PHC pile structure with a buoyancy preventing anchor comprises a pile body(100), a guide unit, multiple anchors(230), an operating rod(300), and a shoe(400). The pile body has a center hole(110). The guide unit has multiple guide holes(120) and a through-hole(130). The multiple guide holes are formed along the outside of the pile body. The through-hole is formed in the pile body in order to expose the pile body to the outside. One end of the multiple anchors is placed in the guide hole. The other end of the multiple anchors is projected from moving members(200). The operating rod is inserted into the center hole. The operating rod is projected to the outside of the pile body. A shoe is installed on one end of the pile body.

Description

PH PILE STRUCTURE HAVING AN ANCHOR FOR PREVENTING BUOYANCY}

The present invention relates to a PI pile structure having an anti-buoyancy anchor, wherein the soft ground and groundwater layers are inserted into the ground located in the upper layer to build a structure, thereby increasing the tip bearing capacity and the frictional force with the soil of the predetermined layer in the ground. The present invention relates to a P. H pile structure having a buoyancy prevention anchor that can effectively prevent the buoyancy rise of the building.

Typically, the method of supporting the structure by using the existing support piles was to use the support piles such as on-site concrete casting, ready-made concrete, steel pipes, etc., and to support the structure by using the tip support force and the principal friction. As such, it is common to support various structures using the tip support of the support pile, and in the case of the soft ground, the length of the support pile must be as long as the depth of the soft ground to generate sufficient tip support.

The lower foundation methods of various structures are classified into shallow foundations (independent footings, complex footings, cantilevered footings, continuous footings, frontal footings, etc.) and deep foundations (eg piles, wells, caissons, etc.) according to their installation depth. Various types of construction methods have been proposed and applied according to the construction method.For the support piles, wooden piles, wooden pipes, steel pipes, or H-shaped steel, etc., ready-made concrete piles (RC, P.H.) Piles, etc.), and the piles cast in the field, and it is common to vary the construction method according to the ground conditions and the required diameter of the supporting piles.

Various types of support piles used in various methods as described above are to function to fully support the load of the structure to be built on the upper, in any of the above method is to use the support force of the support pile by the solid ground at the bottom.

However, when constructing a structure on a deep soft ground, up to now, the support method up to now requires a large number of support piles to be connected and extended in order to reach a strong ground at a deep depth. In terms of economics, the burden on the lower foundation part was high.

However, when building a structure on the ground where the soft ground, the coastal landfill, and the groundwater layer are formed on the upper layer by using the supporting pile, the support pile is buoyantly lifted due to the fluidity of the ground. have. This causes a problem that the building constructed on the ground is distorted and distorted to one side.

The present invention was created in order to solve the above problems, an object of the present invention is to insert a soft ground and groundwater layer in the ground located in the upper floor in order to build a lower landfill, buildings, the support of the tip and the predetermined floor of the ground It is to provide a P. H pile structure having an anti-buoyancy anchor that can effectively prevent the buoyancy rise phenomenon by increasing the friction with the soil .

In a preferred embodiment, the present invention provides a PSI pile structure having an anti-buoyancy anchor.

HS pile pile having the buoyancy preventing anchor has a predetermined length, the central body is formed to form a hollow shape; A plurality of guide holes dug at a predetermined depth along an outer side of the pile body from an inner circumference of the central hole located at one end of the pile body, and formed in the pile body to expose the guide holes to the outside of the pile body; A guide having a through hole; A plurality of anchors, one end of which is disposed in the guide hole, the other end of which protrudes from the central hole and has an inclined surface inclined downward, and protrudes from the other end of each of the moving members and penetrates the through hole; and; The anchor hole is inserted into the center hole, and one end of the plurality of movable members is in contact with the inclined surfaces of the plurality of movable members to open the movable members along the insertion direction, thereby pushing the anchors into the guide hole. An actuating rod projecting out of the pile body through; And a shoe which is installed at one end of the pile body and has a space in which one end of the actuating rod is fitted.

Here, at one outer circumference of the working rod is formed a close inclined surface in which the outer diameter gradually increases along the other end from one end of the working rod,

It is preferable that the inclined surfaces of the moving members are formed in a shape corresponding to the close inclined surface to be in contact with each other.

The inclined surface of the close inclined surface and the moving members may be connected to each other in a screw manner so that the inclined surface of the inclined surface may be sequentially contacted with the inclined inclined surface of the rotated operating rod when the operating rod is rotated. Sliding protrusions are formed on the outer circumference of the members, and the sliding protrusions are positioned in a sliding hole formed in the inner wall of the central hole so that the movable members can slide.

In addition, the through holes are further provided with a metal plate cover of a predetermined thickness, it is preferable that the metal plate cover is destroyed and removed as the anchors formed at one end of the opening moving member protrudes out of the through hole.

According to the present invention, when piles are constructed in the ground where the coastal landfill, soft ground, and groundwater layer are located in the upper layer, the pile is equipped with a shoe mounted at the tip to a predetermined depth, and the support construction is primarily performed. By allowing the anchors to protrude, the frictional force with the soil inside the ground is increased to easily prevent buoyancy in which the pile is vertically raised, thereby preventing the collapse of the building.

1 is a view showing that the PH pile structure with buoyancy prevention anchor of the present invention is constructed on the ground.
FIG. 2 is a cross-sectional view along a line AA of FIG. 1 and showing a state before the anchors according to the first example of the present invention protrude. FIG.
3 is a cross-sectional view illustrating a state after the anchors of FIG. 2 protrude.
4 is a cross-sectional view showing a state before the anchors according to the second embodiment of the present invention.
5 is a cross-sectional view illustrating a state after the anchors of FIG. 4 protrude.
6 is a cross-sectional view showing that the metal plate cover is further installed in the through hole according to the present invention.

Hereinafter, with reference to the accompanying drawings, it will be described the P. H pile structure provided with an anti-buoyancy anchor of the present invention.

Referring to Figures 1 and 2, the HS pile pile structure having a buoyancy prevention anchor of the present invention has a predetermined length, the central body 110 is formed to form a hollow shape and the pile body, and the pile body The guide holes 120 and the plurality of guide holes 120 which are dug at a predetermined depth along the outer side of the pile body 100 from the inner circumference of the central hole 110 is located at one end of the (100) A guide having a through hole 130 formed in the pile body 100 so as to be exposed to the outside of the pile body 100, one end is disposed in the guide hole 120, the other end is the central hole 110 ) And a plurality of anchors protruding from the other end of each of the moving members 200 and penetrating through the through hole 130. 230 and the central hole 110, one end is fitted into the central hole 110 The anchors 230 are pushed into the guide hole 120 by contacting the inclined surfaces 210 of the plurality of moving members 200 to open the moving members 200 along the fitting direction. An actuating rod 300 protruding to the outside of the pile body 100 through the through-hole 130 and one end of the pile body 100 are installed, and one end of the actuating rod 300 is fitted therein. And a shoe 400 in which a space 410 is located.

Here, an inclined surface 310 of which the outer diameter gradually increases along the other end from one end of the operating rod 300 is formed on an outer circumference of the operating rod 300, and an inclined surface 210 of the moving members 200. Are formed in a shape corresponding to the close inclined surface 310 is in contact with each other.

In addition, the inclined surface 210 of the close inclined surface 310 and the moving members 200 are rotated when the operating rod 300 is inserted into the central hole 110 while the operating rod 300 is rotated. Are in contact with each other so as to be in contact with the inclined inclined surface 310 of each other in a screw (S) manner, a sliding protrusion 220 is formed on the outer periphery of the movable members 200, the sliding protrusion 220 is The moving members 200 may slide in a sliding hole 121 formed in an inner wall of the central hole 110.

In addition, the through holes 130 are further provided with a metal plate cover 500 of a predetermined thickness, the metal plate cover 500 is the anchors 230 formed on one end side of the moving member 200 is the through hole 130 may be destroyed and removed as it protrudes outward.

Here, fixing protrusions 501 are formed at upper and lower ends of the metal plate cover 500, and the fixing protrusions 501 may be inserted into and fixed to fixing grooves 101 formed on upper and lower walls of the through hole 130.

In addition, one end surface portion of the movable members 200 is elastically supported by the inner wall of the guide hole 120 and the spring 240, the spring 240 serves to connect and fix the movable members 200 can do.

In addition, the sliding protrusions 220 formed on the upper ends of the moving members 200 may be positioned and moved in the sliding holes 121 formed inside the central hole 110, and the sliding protrusions 220 may be guided. It is limited to the stepped portion 121a that forms the sliding hole 121 in the hole 120 and may not protrude toward the central hole 110.

Next will be described the operation according to the construction of P. C pile with buoyancy prevention anchor of the present invention.

Referring to FIG. 1, first, the pile body 100 having the shoe 400 mounted at the front end thereof is inserted using an external force so as to be based on a predetermined depth on the installation ground 1. Here, the ground (1) may be a ground where the coastal landfill, soft ground and groundwater layer is located in the upper layer. Therefore, by inserting the pile body 100 into the ground, the primary supporting force due to the friction between the pile body 100 and the soil inside the ground 1 can be generated.

At this time, the anchors 230 which are positioned inside one end of the pile body 100 may form a state located inside the guide hole 120. In addition, the movable members 200 are positioned such that one end is positioned in the guide hole 120 and the other end is exposed to the central hole 110.

Then, the operating rod 300 is inserted into the inside of the central hole 110 from the upper end of the pile body (100). At this time, it is preferable to use a device for pressing a predetermined force at the top of the operating rod (300). Therefore, while the operating rod 300 is inserted into the central hole 110, the inclined surface 210 of the moving members 200 is in close contact with the inclined surface 310 of the operating rod 300 as shown in FIG. 3. ), The actuating rod 300 may press the moving members 200.

By the pressing force thereof, the moving members 200 are moved along the guide hole 120 to the outside of the pile body 100. Accordingly, the anchors 230 protruding from one end surface of the moving members 200 protrude a predetermined length to the outside of the pile body 100 through the through hole 130. In addition, the anchors 230 protrude to the outside of the pile body 100 to be inserted into the ground 1 to form additional support force.

Accordingly, by forming an additional support force using the anchors 230, buoyancy of the building can be easily prevented.

In FIGS. 2 and 3, the intimate support surface 310 of the operating rod 300 and the inclined surface 210 of the moving members 200 make sliding surface contact with each other, as shown in FIGS. 4 and 5. The close inclined surface 310 and the inclined surface 210 of the moving members 200 may be coupled to the screw (S).

Accordingly, as shown in FIGS. 4 and 5, the actuating rod 300 is fitted into the central hole 110 of the pile body 100 to press the moving members 200 to laterally move the moving members 200. In the case of moving to, the working rod 300 is rotated by using the external separate rotating device. Accordingly, the close inclined surface 310 of the operating rod 300 is rotated and lowered while being coupled with the inclined surface 210 of the moving members 200 and the screw (S), the moving members 200 are guide holes 120 Can be pushed progressively to move inward.

Accordingly, the anchors 230 installed at one end surface of the movable members 200 may be protruded out of the pile body 100 through the through holes 130 and inserted into the ground 1.

Therefore, the anchors 230 protruding outward through the outer periphery of the pile body 100 in a state in which the pile body 100 is inserted into the ground 1 , that is, a primary support force is generated as in the above-described embodiment. ) May form a separate frictional force with the soil inside the ground (1) . Here, the direction in which the friction force is formed between the anchors 230 and the soil may be in a direction that is different from the direction in which the friction force is formed between the pile body 100 and the soil.

That is, the pile body 100 according to the present invention uses the anchors 230 protruding in the ground 1 to generate additional frictional force with the soil in the ground 1, thereby using the soft ground, coastal landfill or groundwater When the lower foundation work is carried out on the ground where the floor is located in the upper floor, the buoyancy force in which the pile body 100 is lifted upward can be effectively prevented. Accordingly, the risk that the building constructed on the ground 1 as described above collapses due to the buoyancy can be effectively prevented.

Meanwhile, referring to FIG. 6, the through holes 130 are further provided with a metal plate cover 500 having a predetermined thickness. Therefore, the metal plate cover 500 may prevent the soil and the like contained in the ground 1 from flowing into the inner space of the pile body 100, and protect the anchors 230 from the outside.

In addition, when the anchors 230 protrude, the anchors 230 are destroyed by the protruding anchors 230 so that the anchors 230 protrude out of the through hole 130.

100: file body
200: moving member
230: anchor
300: working rod
400: shoe

Claims (4)

A pile body having a predetermined length and having a central hole forming a hollow shape;
A plurality of guide holes dug at a predetermined depth along an outer side of the pile body from an inner circumference of the central hole located at one end of the pile body, and formed in the pile body to expose the guide holes to the outside of the pile body; A guide having a through hole;
A plurality of anchors, one end of which is disposed in the guide hole, the other end of which protrudes from the central hole and has an inclined surface inclined downward, and protrudes from the other end of each of the moving members and penetrates the through hole; ;
The anchor hole is inserted into the center hole, and one end of the plurality of movable members is in contact with the inclined surfaces of the plurality of movable members to open the movable members along the insertion direction, thereby pushing the anchors into the guide hole. An actuating rod projecting out of the pile body through; And
P pile is provided with a buoyancy prevention anchor, characterized in that it is installed on one end of the pile body, the shoe is formed in the inner space is formed one end of the operation rod is fitted. The method of claim 1,
One outer periphery of the working rod is formed with a close inclined surface of the outer diameter gradually increases along the other end from the one end of the working rod,
The inclined surfaces of the moving members are formed in a shape corresponding to the close inclined surface and contacted with each other. Claim 3 was abandoned when the setup registration fee was paid. The method of claim 2,
The close inclined surface and the inclined surface of the moving members,
When the operating rod is rotated and fitted into the center hole, the operating rods are connected to each other in a screw manner so as to be in contact with the inclined inclined surfaces of the rotating operating rods sequentially.
A sliding protrusion is formed on the outer circumference of the moving members, and the sliding protrusion is located in a sliding hole formed in the inner wall of the central hole, and the moving member slides. Claim 4 was abandoned when the registration fee was paid. The method of claim 1,
The through holes are further provided with a metal plate cover of a certain thickness,
The metal plate cover has a buoyancy prevention anchor having a buoyancy preventing anchor, characterized in that the anchor formed on one end side of the moving member is protruded out of the through hole is removed.

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