KR101542126B1 - PHC pile for Prestressed Concrete Member, Manufacturing method of PHC pile amd Construction method of retaining wall using PHC pile - Google Patents

Abstract

In the PHC file for a high-strength PC member having the connecting roots according to the preferred embodiment of the present invention, a hollow is formed along the longitudinal axis at the center of the end face of the concrete pile body, a PC steel bar is formed in the longitudinal direction, A PHC file having a ring section and comprising a spiral reinforcing bar, wherein a longitudinally flat coupling surface is formed on one side of the outer side of the PHC file, and the coupling surface has a front end connection portion embedded in the PHC file, A pair of connecting roots formed by coupling portions formed by projecting and protruding vertically downwardly or upwardly in the longitudinal direction of the PHC pile are formed at regular intervals to form a connection root of a necessary portion such as a beam, a slab and an underground sidewall, And it is particularly effective to make the columns or walls of the outer wall and the ground floor of the underground layer as much as possible, It can be constructed in proximity to the field lines and can simultaneously reduce the thickness of the wall construction when hapbyeok, a useful effect with easy coupling of the wale and the slab.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a PHC pile for a high-strength PC member, a method for manufacturing a PHC pile,

The present invention relates to a PHC file for a high-strength PC (Prestressed Concrete) member, a method for manufacturing a PHC file, and a method for constructing a basement wall using the same, and more particularly, (Prestressed Concrete) member and a method of constructing the same, and to a method of constructing the same by forming a retaining wall using a PHC file for a high strength PC member, The present invention relates to a method of constructing an underground wall in which an outer wall of a basement is integrally formed with an earth retaining wall. In particular, it is possible to construct a wall or a wall of an underground outer wall and a ground floor as close as possible to a site boundary, A PHC pile manufacturing method, a PHC pile, and an underground wall construction method using the pile and slab, .

 Generally, in the case of embankment, cut, excavation, etc., slope is usually maintained to maintain the stability of the ground. However, in order to secure more effective utilization of land or to construct foundation of a structure in the city and underground space of a building The vertical excavation is usually performed without laying slopes, and in order to prevent the collapse of the ground during the vertical excavation, the excavation structure is installed at the vertical position. In addition, since the temporary retaining structure is a temporary structure, it is necessary to dismantle the constructed underground space when it is completed, so that the construction cost and construction period are increased, unnecessary construction material is required, and the material cost is increased.

When the retaining wall is composed of H-file and soil plate, H-PILE (300x200x9x14, 300x300x10x15), Wale (300x300x10x15 (H-PILE) (Minimum 500mm for LW (waterglass contract injection) method, minimum 600mm for SGR (space grouting rocket system) method), minimum 1,100mm is required. Even if there is no order ball, a minimum of 550mm is required at the site boundary when using a perforator to secure a construction space. In order to construct the slope gauge (meter) and ground water level on the back ground, the work space of the crawler drill is at least 400mm, so 550 + 400 = 950mm is basically required to construct the earth retaining wall. In conclusion, the outer wall of the building should be at least 1M above the site boundary to be used as an outer wall, and a minimum of 1.5M is required if the wall is to be rebuilt. Therefore, if the building outer wall line and land boundary line do not reach 1M on the architectural drawing, the minimum thickness of the wall should be calculated and the construction of the earth retaining wall should be planned within the range where the reinforcement can be installed.

Even if the wall is planned as an anchor wall, there is no problem in reinforcing steel reinforcement when the wale and outer wall coincide with each other due to the relation between the retaining wale and the outer wall of the building. However, there is a problem that the amount of concrete increases considerably. There is a problem that the construction is delayed because the belt strips have to be removed.

As a background technology of the present invention, there is a patent registration No. 0960603 entitled " Method of constructing a basement wall using a earth retaining wall made of a picocice file "(Patent Document 1). 8, (a) puncturing the ground along the site boundary, inserting the PHC file, and repeating the final step, thereby forming an earth retaining wall composed of PHC files in the ground; (b) (C) arranging the head of each PHC file, inserting the connecting bar so that it is exposed to the hollow of the PHC file, and then fixing the connecting bar fixing means (D) After excavating at a constant depth and connecting the head of each PHC pile, reinforcement rods are used to form the cap beam, which is the base on which the ground floor pillar or wall is erected. (C) placing the cap beam concrete and the concrete filling the hollow of each PHC pile at the same time; (e) (F) repeating the process of installing a strut connecting the wale band and the inner column to support the earth retaining wall until the planned excavation height is reached; (f) installing a plurality of shear connectors on the outer surface of the PHC file corresponding to the lowest layer (G) After removing the wale and strut of the layer corresponding to the lowest layer + 1 layer, a plurality of layers are formed on the outer surface of the PHC file, (A) repeating the steps of installing the floor shear walls and installing the floor shear wall concrete and installing the floor shear walls to the ground floor and the floor; and (h) installing the ground floor concrete (F), in the step of (f), at the bottom floor of the portion where the foundation floor and the sidewall are in contact with each other, Proposes a hapbyeok basement construction method. "Using the retaining wall consisting of PHC piles, it characterized in that the portion is formed such that dances large bracket relative to other parts of the floor foundation to the load is evenly transmitted to the ground.

However, the background art has a problem in that it is not easy to construct a separate shear connection member to install the shear walls.

Patent Registration No. 0960603 "Method of constructing an underground wall using an earth retaining wall made of a pic.

SUMMARY OF THE INVENTION The present invention has been made in order to solve the above problems, and it is an object of the present invention to provide a PHC pile having a flat coupling surface in the longitudinal direction on the outer side of the PHC pile, Strength PC member for a high-strength PC member, and a PHC file.

In particular, it is possible to construct the columns or walls of the basement outer wall and the ground floor as close to the site boundary as possible and at the same time to reduce the thickness of the wall during the construction of the concrete wall, The present invention provides a method of constructing an underground steel wall using the method of the present invention.

The present invention provides a PHC file having a hollow portion formed along the longitudinal axis at the center of the cross section of the concrete pile body, a PC steel bar in the longitudinal direction, a spiral reinforcing bar outside the PC steel bar, A coupling plate formed on one side surface of the outer side in a longitudinal direction and flattened in the longitudinal direction, a coupling plate formed on the coupling surface at a predetermined interval by a through hole and an outer side of the coupling plate so as to be detachable, And the coupling surface is formed with a front end connection portion in which one end portion is embedded in the PHC file and a coupling portion in which the front end portion is protruded outward from the coupling surface and bent downward or upward in the longitudinal direction of the PHC pile The connecting rods are formed at regular intervals in pairs, and the connecting portions penetrate the through holes of the coupling plate, Document is bent vertically upward or downward to provide a PHC file for the high-strength member composed of PC.

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Further, in the PHC file, a pair of order grouting grooves opposite to each other is formed on the outer side of the PHC file so that injection holes can be formed by neighboring PHC files. In the high strength PC member You want to provide a PHC file.

The present invention also provides a PHC file for a high-strength PC member having a connecting rope integrally formed by arranging a PC steel bar on the inner side of the bent portion of the connecting roots.

The present invention also provides a PHC file for a high-strength PC member having a connection root integrally formed with an arcuate shape having a curvature equal to a curvature of a cross section of the PHC pile.

The present invention also provides a PHC file for a high-strength PC member having a coupling root integrally formed with coupling surfaces and coupling roots constituting the coupling surfaces on both sides of the PHC pile.

The present invention also provides a PHC file for a high-strength PC member, the PHC file having an octagonal cross-section.

(A) a plurality of PC steel rods are arranged in a circular shape, and a spiral reinforcing bar is welded to the outside of the PC steel rods, the reinforcing rods are formed in a direction perpendicular to the PC steel rods, A pair of connection roots consisting of a front end connection portion formed in a bent shape and a connection portion bent in the longitudinal direction of the PC steel bar extending from the front end connection portion are arranged at regular intervals in the longitudinal direction of the PC steel rods, Wherein the coupling box is formed at a predetermined interval in the upper portion of the coupling plate and the coupling plate is formed at a lower portion of the coupling plate, And is formed as a lid having an arch-shaped cross section, And the step of passing through the through hole of the engaging plate portion, configured to be received in the engaging portion in the storage space;
A step; (b) placing the mold or the fastening box in the lower mold with the mold facing downward after being assembled in the step (a); (c) injecting concrete (C) into a lower mold; (d) covering and bonding an upper mold to an upper portion of the lower mold; (e) the PC steel bar is strained by applying a tensile force; (f) centrifugally molding the mold by centrifugal force by rotating it on a centrifugal table, and vapor-curing the mold; (h) demolding the mold and completing the PHC file. The present invention provides a method of manufacturing a high strength PC member for a high strength PC member.

In addition, in the step (a), the fastening box may be formed by a coupling plate formed with a through hole through the upper portion at a predetermined interval, and a cover having an arcuate cross section, Wherein a front end connection portion of the connection root passes through the through hole of the coupling plate and is housed in the coupling portion in the storage space.

In addition, an arcuate mold is formed on the inner surface of the coupling surface of the lower mold and the upper mold to form an order grouting groove on the opposite surface of the PHC pile. The PHC file for the high strength PC member And to provide a manufacturing method thereof.

(A) puncturing the ground along the site boundary, inserting the PHC file so that the connection roots face inward, and repeating the final step, thereby forming an earth retaining wall composed of PHC files in the ground; (b) advancing to the lowest layer while supporting with wrist strap and strut; (c) spreading the coupling part of the connection roots of the PHC pile forming the earth retaining wall horizontally, installing a mold inside the earth retaining wall, and installing an concrete wall by pouring concrete. The present invention provides a method of constructing an underground concrete wall using a PHC file for a high-strength PC member,

The present invention relates to a PHC pile having a flat coupling surface in the longitudinal direction on the outer surface of a PHC pile and a connection root in a coupling surface at constant intervals to stretch connecting roots of required portions such as beams, There is a very beneficial effect in that it plays a role.

In addition, the method of constructing the underground concrete wall using the PHC file in which the connection roots of the present invention are formed integrally can be carried out as close to the site boundary as possible, especially at the columns or walls of the underground outer wall and the ground floor, and at the same time, And there is a very useful effect that the combination of the wale band and the slab is easy.

BRIEF DESCRIPTION OF THE DRAWINGS The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate exemplary embodiments of the invention and, together with the description, serve to explain the principles of the invention, Shall not be construed as limiting.
1 is a perspective view of a first embodiment of a PHC file for a high-strength PC member having a connecting rope of the present invention integrally formed thereon.
Fig. 2 is a perspective view of a second embodiment of a PHC file for a high strength PC member in which the connecting roots of the present invention are integrally formed.
3 and 4 are cross-sectional views of various embodiments of the first and second embodiments of the PHC file for a high-strength PC member in which the connecting roots of the present invention are integrally formed.
Fig. 5 is a perspective view of a third embodiment of a PHC file for a high-strength PC member constituted integrally with the connecting roots of the present invention.
6 is a cross-sectional view of an embodiment in which the PHC file of the present invention has an octagonal cross section.
FIG. 7 is a flowchart showing a method for manufacturing a PHC file for a high-strength PC member in which the connecting roots of the present invention are integrally formed in order.
8 is a view illustrating a method of constructing an underground concrete wall using a PHC file for a high-strength PC member having the connecting roots of the present invention integrally formed thereon.
FIG. 9 is a view for explaining steps of constructing an earth retaining wall in a method of constructing an underground concrete wall using an earth retaining wall constructed of a conventional PHC file.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail below with reference to the embodiments shown in the accompanying drawings, but the present invention is not limited thereto.

 Hereinafter, the technical structure of the present invention will be described in detail with reference to the preferred embodiments.

First, various embodiments of a PHC file for a high strength PC (Prestressed Concrete) member of the present invention will be described in detail with reference to the drawings.

1 is a perspective view showing a first embodiment of a PHC file for a high-strength PC member having a connecting rope integrally formed according to the present invention.

As shown in Fig. 1, the PHC file 1 for a high-strength PC member,

The PC rigid bar 11 is formed in the longitudinal direction and the spiral reinforcing bar 12 is formed on the outside of the PC steel bar 11 and a hollow is formed in the central portion. A connecting surface 1a having a flat surface is formed on one side of the connecting surface 1a, and connection roots 40 are formed on the connecting surface 1a at regular intervals, and one pair or more pairs may be formed at the same height have.

The connecting rope 40 is composed of a front end connection portion 41 embedded in the PHC file 1 and a coupling portion 42 protruding outwardly and the front end connection portion 41 is connected to the PC rigid bar 11 in a vertical direction The coupling part 42 extends from the front end connection part 41 and is bent in the longitudinal direction at the outer surface of the PHC pile 1. [

The front end connection portion 41 embedded in the PHC file 1 serves as a front end connection member and is formed so as to have a shape bent toward the outside and bent toward the center so as to resist drawing, 1 in the vertical direction or in the vertical downward direction with respect to the longitudinal direction.

In addition, the PHC file 1 can be formed such that a pair of adjacent grouting grooves 13 are formed on the outer surface of the PHC file 1 so that injection holes can be formed by adjacent PHC files 1 have.

FIG. 2 is a perspective view showing a second embodiment of a PHC file for a high-strength PC member having a connecting rope according to the present invention formed integrally.

2, the second embodiment of the PHC file for a high-strength PC member in which the connecting roots of the present invention are integrally formed is the same as the first embodiment, except that the PHC file 1 is fastened to the coupling surface 1a of the PHC file 1 A box 30 is further constructed.

The fastening box 30 includes a plate-like coupling plate 32 configured to face the coupling surface 1a of the PHC file 1 and a lid 33 coupled to allow the outer side of the coupling plate 32 to be opened and closed .

The through holes 321 are formed at predetermined intervals in the coupling plate 32. The through holes 321 are formed so that the coupling portions 42 of the connection rods 40 pass through.

The cover 33 is formed in an arcuate shape so that the PHC file 1 has a complete circular cross section. When the PHC 1 is coupled with the engaging plate 32, a storage space 31 is formed therein, The engaging portion 42 of the engaging portion 40 is received.

The coupling plate 32 and the cover 33 may be easily detachable by various known methods, for example, the coupling protrusions and corresponding coupling grooves may be respectively formed.

3 and 4 are cross-sectional views of various embodiments of the first and second embodiments of the PHC file for a high-strength PC member in which the connecting roots of the present invention are integrally formed.

3 and 4, the connecting rope 40 is composed of a front end connection portion 41 embedded in the inside of the PHC file 1 and a coupling portion 42 protruding outwardly, and the front end connection portion 41 Is formed in a vertical direction with respect to the PC steel bar 11 and has a central bent portion outwardly and the engaging portion 42 is extended from the front end connection portion 41 to extend in the longitudinal direction As shown in Fig.

The front end connection portion 41 is formed so that the portion embedded in the PHC file 1 is bent at the center and directed toward the outside. The front end connection portion 41 may be bent at a right angle as shown in FIG. 3, As shown in the figure, the end side may be bent so as to be formed in the same arcuate shape as the end surface of the PHC file 1.

The front end connection portion 41 embedded in the PHC file 1 serves as a front end connection member and is formed so as to have a shape bent toward the outside and bent toward the center so as to resist drawing, 1 in the vertical direction or in the vertical downward direction with respect to the longitudinal direction.

As shown in FIG. 3, the PC steel bar 11 may be formed inside the bent portion of the front end connection portion 41 to correspond to the pulling force of the connecting rope 40 after construction.

3A, it is also possible to form the connection roots 40 formed in pairs of different height adjacent to each other at different intervals, for example, when the coupling portion 42 is bent beneath the vertical direction of the PHC file 1 The width of the pair of connecting rods 40 is set such that the length of the PHC pile 1 is set such that the end of the connecting portion 42 does not interfere with a pair of connecting roots 40 immediately below the pair of connecting rods 40. [ The width can be formed so as to be staggered in the direction.

5 is a cross-sectional view of a third embodiment of a PHC file for a high-strength PC member in which the connecting roots of the present invention are integrally formed.

As shown in Fig. 5, it is possible to form the coupling surface 1a having only four orthogonal directions and flattened.

The PHC file 1 in which the coupling surface 1a and the connecting roots 40 constituting the coupling surface 1a are formed on both of the four outer surfaces of the PHC pile 1 which are orthogonal to the PHC pile 1, .

If the connecting roots 40 are formed in all four directions as described above, the joining portions 42 of the joining rods 40 of the joining portions of the slab and the beam can be unfolded horizontally. Therefore, It is possible to make the joining of the slab and the beam very easy while utilizing it as a column.

6 is a cross-sectional view of an embodiment in which the PHC file 1 of the present invention has an octagonal section.

The connection roots 40 may be formed to have an octagonal cross section as shown in Figs. 6A and 6B.

When the octagonal cross-section is formed as shown in FIG. 6C, the cross-sectional shape of the entire PHC file 1 can be made octagonal. When used as an intermediate pillar, Not only is it easy to assemble, but it is very easy to assemble even when joining beams in two directions in three directions.

As shown in FIGS. 6A and 6B, the connection roots 40 may be formed with two pairs (four) of connection roots 40 at the same height. At this time, The PC rigid bar 11 may be formed inside the bent portion of the shear connection portion 41 so as to correspond to the pulling force of the connecting rope 40 after the construction, The shear connection portions 41 may be mutually connected.

FIG. 7 is a flowchart showing a method for manufacturing a PHC file for a high-strength PC member in which the connecting roots of the present invention are integrally formed in order.

As shown in FIG. 7, a method for manufacturing a high-strength PC member PHC file in which the connecting roots of the present invention are integrally formed will be described in detail.

First, a plurality of PC steel bars 11 are arranged in a circular shape, and the spiral reinforcing bars 12 are welded to the outside of the PC steel bar 11, thereby joining the connecting rods 40 together (a).

The PC steel bar 11 as the cast iron root of the file is appropriately cut to the length of the PHC file and both ends of the PC steel bar 11 are processed into a structure capable of fixing at the time of the tensioning operation and the spiral reinforcing bars 12 are welded to the outside of the PC steel bar 11 do. The total diameter is determined by the diameter of the PHC file.

The connection roots 40 are formed by vertically extending the PC rigid bar 11 and having a central bent portion outwardly bent and extending from the front end connection portion 41 to extend in the longitudinal direction of the PC rigid bar 11 The connecting rods 40 constituted by the engaging portions 42 bent in the longitudinal direction of the PC steel bar 11 are arranged at a predetermined interval in the longitudinal direction of the PC steel bar 11. [

The connecting roots 40 are arranged at regular intervals with respect to the longitudinal direction of the PC steel rods 11, and are configured in pairs.

3A, the coupling rods 40 may be formed at different heights so that the coupling portions 42 may be formed at different intervals in the PHC file 1, The width of the pair of connecting rods 40 is set so that the ends of the connecting portions 42 do not interfere with the pair of connecting roots 40 immediately below the pair of connecting ropes 40. Therefore, 1 in the longitudinal direction.

The mold 20 or the fastening box 30 is formed in the portion where the connecting rope 40 is formed and is formed so as to constitute the engaging surface 1a on one side in the longitudinal direction when the PHC pile 1 is completed .

Both the formwork 20 and the fastening box 30 have a flat surface on the inside of the PHC pile 1 and an arcuate cross-section on the outside.

The fastening box 30 includes a plate-like coupling plate 32 configured to face the coupling surface 1a of the PHC file 1 and a lid 33 coupled to allow the outer side of the coupling plate 32 to be opened and closed .

The through holes 321 are formed at predetermined intervals in the coupling plate 32. The through holes 321 are formed so that the coupling portions 42 of the connection rods 40 pass through.

The cover 33 is formed in an arcuate shape so that the PHC file 1 has a complete circular cross section. When the PHC 1 is coupled with the engaging plate 32, a storage space 31 is formed therein, The engaging portion 42 of the engaging portion 40 is received.

In addition, the front end connection portion 41 is formed so that the portion embedded in the PHC file 1 is bent at the center and directed toward the outside. The front end connection portion 41 may be bent at a right angle, But may be bent so as to have the same arcuate shape as the end surface.

If the cross section of the PHC file 1 is to be formed into an octagonal shape, it is possible to form a PHC file having an octagonal cross section by forming an additional mold on the outside.

5, the mold 20 or the fastening box 30 and the connecting rope 40 are arranged in all four directions orthogonal to each other so that the mold 20 or the fastening box 30 is constructed on all four orthogonal outer sides of the PHC file 1. [ .

Thereafter, the PC rigid bar 11 and the spiral reinforcing bars 12 and the connecting rods 40 and the like are positioned and fixed to the lower mold 2a with the mold 20 or the fastening box 30 facing downward (B).

At this time, the tip shoe and the reinforcing band can be coupled to the tip, and the assembly coupling is performed in the lower mold 2a.

Thereafter, the concrete C is injected into the lower mold 2a (c).

A predetermined amount of concrete C is injected into the lower mold 2a so as not to exceed the lower mold 2a.

Then, the upper mold 2b is covered and joined to the upper portion of the lower mold 2a (d).

After the upper mold 2b is put on the upper part of the lower mold 2a and assembled, the bolts are tightened to be integrated. The lower mold 2a and the upper mold 2b can be coupled through bolts and nuts to facilitate demoulding when the curing of the inserted concrete is completed.

 Thereafter, the PC steel bar 11 is strained by applying a tensile force (e).

 The PC rigid bar 11 is strained by applying a tensile force equal to a calculated amount by which a predetermined prestress is applied to the PHC file 1. [ And both ends of the PC steel bar 11 are fixed in a state where the tension is maintained after the tension.

Thereafter, the molds 2a and 2b are rotated on a centrifugal table, centrifugally molded using centrifugal force, and vapor-cured (f).

The thickness of the PHC pile 1 is formed and the molds 2a and 2b are rotated on the centrifugal table to compose the concrete C in the molds 2a and 2b using centrifugal force And the product is molded in a cylindrical shape.

 In addition, after centrifugal molding, atmospheric steam curing, which is a kind of accelerated curing, is carried out in order to increase the productivity of products and promote curing by factory products.

Thereafter, the molds 2a and 2b are demolded and the PHC file 1 is completed (h).

The completed PHC file 1 is taken out and the molds 2a and 2b are demolded for repeated use of the molds 2a and 2b.

As a follow-up process, the product can be placed in a curing tank called an autoclave which is designed to withstand high pressures by high temperature and high pressure steam curing, and the secondary curing can be carried out at a pressure of 180 degrees and 10 kilos. The purpose of autoclave curing is to increase the strength of concrete. At high temperature and high pressure, the reaction of calcium hydroxide and silica in cement accelerates to produce a chemical composition which enhances the strength of turbomolite. As a result, Can be expressed.

An arcuate mold 20 is formed on the inner side of the coupling surface of the lower mold 2a and the upper mold 2b to form an order grouting groove 13 as shown in Fig. Can be formed.

When the lower mold 2a and the upper mold 2b are coupled to each other, the mold 20 can be divided into halves so as to be arcuate so as to be respectively formed in the lower mold 2a and the upper mold 2b, , And the upper mold 2b may be engaged.

The PHC file formed by the method of manufacturing a PHC file and the method of the present invention as described above has a flat coupling surface in the longitudinal direction on the outer surface of the PHC file and a connection root is formed at a constant interval on the coupling surface, Slabs and underground sidewalls, to serve as shear connectors or joints.

8 is a view illustrating a method of constructing an underground concrete wall using a PHC file for a high-strength PC member having the connecting roots of the present invention integrally formed thereon.

In the method of constructing an underground concrete wall using a PHC file for a high-strength PC member having a connecting rope of the present invention, the ground is drilled along the site boundary and the PHC file 1 is inserted and inserted so that the connecting rope 40 faces inward. Repeat the final step to form a retaining wall consisting of the PHC pile (1) in the ground (a).

Then, while supporting the wrist strap 3 and the strut 4, they are excavated to the lowest layer (b).

The digging step is performed until the planned excavation height is reached by repeating the process of installing the strut 3 and the strut 4 connecting the wedge 3 to the inner column so as to support the earth retaining wall . The strut method for supporting the earth retaining wall composed of the H-pile plate can be used as a method for supporting the gutscale earth retaining wall, and the method can be arbitrarily selected from other known methods.

After that, a formwork is installed inside the earth retaining wall and concrete is installed to form an abutment wall (c).

The engaging portion 42 of the connecting rope 40 of the PHC file 1 constituting the earth retaining wall is turned horizontally. As shown in Fig. 7 (d), the connecting roots 40 may be used in a state in which they are bent in a horizontal state, bent in a horizontal state in a flat state, or alternately.

Thereafter, the formwork is installed inside the earth retaining wall, and concrete is placed between the earth retaining wall and the formwork to complete the underground concrete wall.

The method of constructing the underground concrete wall using the PHC file of the present invention as described above can reduce the thickness of the wall during the construction of the concrete wall as well as the pillar or wall of the underground layer and the ground layer, .

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is evident that many alternatives, modifications and variations will be apparent to those skilled in the art in light of the above teachings. will be. The invention is not limited by these variations and modifications, but is limited only by the claims appended hereto.

1: High-strength PC member PHC file
2a: Lower mold
2b: upper mold
11: PC steel rods
12: Spiral reinforcing bars
13: Order Grouting Home
20: Form
30: Fastening box
31: Storage space
32: engaging plate
33: Cover
40: Connection
41: Shear connection
42:

Claims (11)

A PC steel bar 11 is formed in the longitudinal direction, a spiral reinforcing bar 12 is formed outside the PC steel bar 11, a PHC file having a ring section, (1)
A coupling surface 1a which is flat in the longitudinal direction is formed on one side of the outer side of the PHC file 1,
A coupling plate 32 formed through the through hole 321 at a predetermined interval is formed on the coupling surface 1a and a storage space 31 is formed inside the coupling plate 32 so as to be detachable from the coupling plate 32, A fastening box 30 formed of a lid 33 having a cross section is combined,
The coupling surface 1a is formed with a front end connection portion 41 embedded in the PHC file 1 and one end portion protruded outside the coupling surface 1a and bent downward or upward in the longitudinal direction of the PHC pile 1 The connecting rods 40 formed by the connecting portions 42 are formed at regular intervals and the connecting portions 42 pass through the through holes 321 of the connecting plate 32 and are vertically upward Wherein the reinforcing member is folded downwardly or downwardly. delete The method according to claim 1,
The PHC file is characterized in that a pair of adjacent grouting grooves (13) are formed on the outer surface of the PHC file (1) so that injection holes can be formed by neighboring PHC files. PHC file for high-strength PC member. The method according to claim 1,
And the PC steel bar (11) is arranged on the inner side of the bent portion of the connecting rope (40). The method according to claim 1,
Wherein the front end connecting portion (41) of the connecting rope (40) is formed in the same arcuate shape as the curvature of the cross section of the PHC file (1). The method according to claim 1,
Characterized in that the coupling surface (1a) and the connecting roots (40) constituting the coupling surface (1a) are arranged on all four outer surfaces of the PHC pile (1) which are orthogonal to each other. The method according to claim 1,
Wherein the PHC file (1) is formed to have an octagonal cross-section. A method for producing a PHC pile (1) by centrifugal molding,
(a) A plurality of PC steel rods 11 are arranged in a circular shape and the spiral reinforcing bars 12 are welded to the outside of the PC steel rods 11,
A front end connection part 41 formed in a vertical direction with respect to the PC steel bar 11 and having a central bent part outwardly and a coupling part 41 extending from the front end connection part 41 and bent in the longitudinal direction of the PC steel bar 11 42 are arranged at a predetermined interval in the longitudinal direction of the PC steel bar 11 in pairs,
(20) or a fastening box (30) having a flat upper surface and an arcuate lower surface and an engaging portion (42) of the connecting rope (40)
The fastening box 30 is formed with a coupling plate 32 formed at the upper portion thereof with a through hole 321 formed at a predetermined interval and a coupling space formed between the coupling plate 32 and the coupling plate 32, And is formed by a lid 33 having an arcuate cross section,
The front end connecting portion 41 of the connecting rope 40 passes through the through hole 321 of the engaging plate 32 and is accommodated in the engaging portion 42 in the receiving space 31;
(b) placing the components assembled in the step (a) in the lower mold 2a with the mold 20 or the fastening box 30 facing downward;
(c) injecting concrete (C) into the lower mold (2a);
(d) covering and bonding the upper mold 2b to the upper portion of the lower mold 2a;
(e) the PC steel bar 11 is strained by applying a tensile force;
(f) centrifugally molding the molds 2a and 2b using a centrifugal force by rotating the molds 2a and 2b on a centrifugal table, and performing vapor curing;
(h) demolding the molds (2a) and (2b) and completing the PHC file (1). delete The method of claim 8,
An arcuate mold 20 is formed on the inner side surface of the coupling surface of the lower mold 2a and the upper mold 2b to form an order grouting groove on the opposite surface of the PHC pile. Wherein said method comprises the steps of: A method for constructing an underground sidewall using a PHC file (1) for a high-strength PC member, the connection roots being integrally constructed as claimed in any one of claims 1 and 3 to 7,
(a) piercing the ground along the site boundary and inserting the PHC file (1) so that the connecting roots (40) face inward, and finally finishing the striking step to form a retaining wall composed of the PHC pile ;
(b) supporting the wrist strap (3) and the strut (4) while simultaneously advancing to the lowest layer;
(c) spreading the coupling part 42 of the connecting rope 40 of the PHC file 1 constituting the earth retaining wall horizontally, installing a mold inside the earth retaining wall, and installing an concrete wall by pouring concrete The method according to claim 1, wherein the PHC pile for a high-strength PC member is formed by integrally connecting the connecting roots.

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