KR20140102077A

KR20140102077A - Construction Method Of Earth Retaining Wall Using PHC Pile

Info

Publication number: KR20140102077A
Application number: KR1020130015511A
Authority: KR
Inventors: 김원근; 김대호; 원영술; 김영호
Original assignee: (주)한울구조안전기술사사무소; (주)이피에치씨
Priority date: 2013-02-13
Filing date: 2013-02-13
Publication date: 2014-08-21

Abstract

The present invention relates to a construction method of PHC pile for an earth retaining wall which is deep by embedding the PHC pile in order to form the earth retaining wall. According to an embodiment of the present invention, the present invention is configured to comprise: (a) installing a guide beam formed with a seating groove at the end of a flange; (b) forming a punch ball and embedding a casing; (c) coupling an upper disk of a connecting member to the lower end of the PHC pile; (d) hanging both ends of a support rod to the seating groove of the guide beam; (e) supporting the lower end of the PHC pile; (f) removing the casing; and (g) filling an inner hollow of the PHC pile with concrete.

Description

FIELD OF THE INVENTION [0001] The present invention relates to a method of constructing a pile for a pile wall having a deep depth,

The present invention relates to a method of constructing a deep seated pile for a deep seated pavement, and more particularly, to a method of constructing a deep seated pile for a deep deep pile or a deep earth pressure, The present invention relates to a method for constructing a pile-helix file for a deep-retained wall.

The retention method can be variously classified according to the type of the earth retaining wall for maintaining the self-reliance of the back side soil and the type of support for structurally supporting it. There are H pile + soil plate, steel sheet pile, cast in place pile, SCW (Soil Cement Wall), Diaphragm Wall, Slurry Wall, and so on. Ground anchor method, and soilless nailing method.

The earth retaining wall or the earth wall was originally constructed as a temporary structure for the purpose of resisting the side pressure such as earth pressure and water pressure during the foundation erosion work. However, recently, as the excavation works in the urban area become more frequent, And the purpose of use is diversified.

Especially in recent years, it has been used as a part of building body such as foundation piles and seismic walls as well as simple temporary earth retaining walls due to the emergence of continuous concrete reinforced concrete walls developed to cope with the prevention of pollution such as noise and settlement.

In order to select the most effective construction method among the various retaining methods, it is necessary to comprehensively consider the soil condition, the site condition, the influence on the site periphery, the construction cost, construction period, and construction.

As a technology to be a background of the present invention, there is a patent registration No. 0696271 entitled "Permanent concrete pile used in permanent paving structure" (Patent Document 1). In the background art, as shown in FIG. 10, the left and right connection pipes, which are formed in the shape of an arm so that the connecting rod 220 connecting the plurality of ready-made concrete piles can be inserted in the concrete concrete pile used in the permanent retaining structure, And the left and right connection pipes are tightly coupled to each other by being connected to each other so as not to be separated from the ready-made concrete pile.

However, the above background art has a problem in that it is difficult to maintain the vertical position of the file when the concrete file is embedded, and it is difficult to keep the column and the interval of the file constant so that it is practically impossible to assemble the connecting rod between the file and the file.

Also, there is a problem in that it is impossible to install a connecting rod between a file and a file if the depth of penetration is too deep to insert the file in order to form the earth retaining wall when the depth of the file is large or the earth pressure is large.

Patent Registration No. 0696271 "Prefabricated Concrete File for Permanent Retaining Structure"

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 It is an object of the present invention to provide a method of constructing a PEH file for a retaining wall that can maintain the same spacing between PHC files and can maintain a column of a PHC file at a constant depth.

(A) installing a guide beam spaced at a predetermined distance from a center line as a planned earthmoving line on the ground and having front and rear H-shaped grooves and having a seating groove formed at an end of the flange at regular intervals; (b) burying the casing at a predetermined interval between the guide beam and the guide beam to form a perforation and embedding the casing; (c) a disk-shaped upper disk having grouting grooves formed on opposite sides thereof and having holes formed at regular intervals to form a coupling hole, a disk-shaped lower disk having grouting grooves formed on opposite sides thereof, And a reinforcing piece arranged radially between the upper and lower circular plates, and a hollow portion is formed in a longitudinal direction of the central portion, Joining the upper plate of the connecting member to the lower end of the PHC pile having a grouting groove formed in the longitudinal direction of both facing sides and having a through hole horizontally passing through the grouting groove perpendicularly to the grouting groove at a predetermined interval at the upper end, ; (d) pulling the PHC pile into the interior of the casing and passing the support rods through the through holes so that both ends of the support rods span the seating grooves of the guide beams; (e) injecting grout into the grouting grooves of the PHC pile so that the grout agent is injected between the outer surface of the PHC pile and the inner surface of the casing, thereby filling the bottom of the pile pore to support the lower end of the PHC pile; (f) removing the casing; (g) filling the inner hollow of the PHC pile with concrete. The present invention provides a method of constructing a deep seated pile for a deep pile wall.

Also, in the step (a), it is desired to provide a method of constructing a deep seated pile for a deep-seated wall, characterized in that the gap fixing member is coupled to the upper part to interconnect two parallel guide beams.

The gap fixing member is formed to have a C-shaped cross section and has a plurality of grooves corresponding to the flange of the guide beam formed at the end portion of the opening side, and is fitted to the upper portion of the guide beam so as to be perpendicular to the guide beam. We intend to provide a method of constructing a PEI file for a deep retaining wall.

In addition, in step (b), a guide is coupled to the inner upper end portion of the casing so as to protrude inwardly at a portion intersecting the center line, thereby providing a deep-seated piechip construction method for a deeply-

In addition, in the step (c), when joining the connecting member and the H-shaped steel, angles having a cross-section are welded to the joining portions of the H-shaped steel and the lower end of the lower circular plate of the connecting member. And to provide a method for constructing a pile of pile for a retaining wall.

According to the deep-seated pile construction method of the present invention, the upper end of the PHC file is mounted using a guide bar and the lower end of the PHC file is free-standing, thereby maintaining the verticality of the PHC file perfectly. , It is possible to maintain the same spacing between the PHC files by forming the mounting grooves at regular intervals in the guide beams, and there is a very useful effect that the heat of the PHC file can be kept constant.

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.
Figs. 1 to 6 are construction sequence diagrams showing a side cross-section and a plan view of the method of constructing the PE pile for an earth retaining wall according to the present invention.
FIG. 7 is a perspective view of a guide beam used in the method of constructing a PICH file for a deep-seated wall according to the present invention.
8 is an exploded perspective view and a cross-sectional side view of the PHC pile used in the method of constructing a PE pile for a deeply-penetrating earthen wall according to the present invention.
FIG. 9 is a perspective view showing an embodiment in which a file is supported on a guide beam in a PICH file construction method for a deep-seated wall according to the present invention.
10 is a cross-sectional view of a state in which a conventional concrete pile is installed.

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.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a construction flowchart showing a method of constructing a PICH file for a deep-seated wall according to an embodiment of the present invention; FIG.

First, as shown in FIG. 1A, a guide beam 100 is installed on the front and rear sides of the ground line spaced apart from the center line CL, which is a planned earth moving line on the ground. That is, two guide beams 100 are fixed and installed parallel to each other with a predetermined distance around the center line CL.

As shown in FIG. 1B, the gap between the guide beam 100 and the guide beam 100 serves as a guide when drilling, so that the PHC file 300 can be aligned in a column.

The guide beam 100 has an H-shaped cross section including a web 110 corresponding to a central transverse bar and a flange 120 formed at both ends of the web 110 .

In addition, the gap fixing member 140 is coupled to the upper portion so as to interconnect the two parallel guide beams 100, so that the parallel two guide beams 100 are maintained at regular intervals and are not separated from the installed positions .

The gap fixing member 140 may be formed in various shapes. Specifically, the gap fixing member 140 may be formed by joining an angle, a channel, a reinforcing bar, etc. to an upper portion of two parallel guide beams 100 by welding or bolting.

2A, when the installation of the guide beam 100 is completed, the casing is punctured at a predetermined interval between the guide beam 100 and the guide beam 100, as shown in FIG. 2A.

At this time, the ceiling hole 210 is formed so as to be deeper than the length of the PHC file 300 and is formed to be deeper than the length of the PHC file to be embedded as a whole. Thereafter, the PHC file 300 is inserted into the ceiling hole 210 So that the lower end of the PHC pile 300 is free when the guide beam 100 is mounted on the upper part.

The perforation using the casing 200 may be used to prevent the collapse of the pneumatic wall in the soft ground, but it is also possible that the PHC pile 300 is not influenced by the flowing of the gravel or the like on the pneumatic wall, So as to flow in the casing 200 so as to maintain a vertical degree.

The casing 200 may be configured to be shorter than the length of the PHC file 300 because the casing 200 serves as a guide while allowing the PHC file 300 to flow at a constant interval from the inside.

As shown in FIG. 2B, the guide holes 100 are formed between the guide beams 100 installed in parallel to form the perforations 210 while embedding the casing 200.

Then, the H-shaped steel 500 is joined to the lower end of the PHC file 300 using the connecting member 400 (c).

The H-shaped steel 500 is coupled to the lower end of the connecting member 400 and the upper end of the connecting member 400 to which the H-shaped steel 500 is coupled is coupled to the lower end of the PHC pile 300 do.

A detailed description of the PHC file 300 used in the present invention will be described later with reference to the drawings.

Thereafter, as shown in Fig. 3A, the PHC file 300 is drawn into the casing 200 (d).

When the PHC file 300 configured as described above is drawn into the casing 200, the PHC file 300 has a lower end portion of the H-shaped steel 500 formed at the lower portion of the PHC file 300, The upper end of the supporting rod 370 is exposed to both sides of the PHC pile 300 so that both ends of the supporting rod 370 are not engaged with the mounting grooves 121 of the guide beam 100, So that the PHC file 300 can be maintained in the vertical direction by gravity.

Further, when the PHC file 300 is drawn into the casing 200, the grouting grooves 320 may be bent without being aligned with the center line CL. 3A and 3B, the guide 220 is coupled to the inside upper end portion of the casing 200 so as to protrude inward at a portion intersecting the center line CL, so that the PHC file 300 The grouting groove 320 of the PHC file 300 is guided along the guide 220. [

The guide 220 may be formed by fitting a coupling piece having a U-shaped cross section to the upper end of the casing 200 or welding a protruding piece to the inner side surface of the casing 200, A C clamp having various sizes may be used.

4A, grout grout is injected into the grouting grooves 320 of the PHC file 300 to groove the grooves on the lower portion of the PHC file 300 to support the PHC file 300 (e).

The injection of the grout is injected into the grouting grooves 320 of the PHC pile 300. As a result, as shown in Fig. 4B, the outer surface of the PHC pile 300 and the inner surface of the casing 200 So that the lower end of the PHC pile 300, which is floated at the lower end of the pile hole 210, is supported. Since the connecting member 400 is coupled to the lower end of the PHC pile 300 to shield the hollow 310, the grout is not drawn into the hollow 310 So that the PHC file 300 is supported.

Thereafter, as shown in Fig. 5, the casing 200 is removed (f).

Upon removal of the casing 200, the support rod 370 formed on the PHC pile 300 is removed from the PHC pile and the casing 200 is removed by applying appropriate pressure.

Thereafter, as shown in FIG. 6A, the inner hollow 310 of the PHC file 300 is filled with concrete (g).

The hollow 310 of the PHC pile 300 may be filled with a grout, but the concrete is filled to obtain sufficient strength.

6B, a connecting member 400 is formed at the lower end of the PHC file 300 to shield the lower end of the PHC file 300, so that the hollow 310 can be filled with concrete.

FIG. 7 is a perspective view of a guide beam used in the method of constructing a pile-stick pile for a deep-seated wall according to the present invention

7, the guide beam 100 is formed of an H-shaped beam. The guide beam 100 has an H-shaped cross-sectional shape including a web 110 corresponding to a central transverse bar and a flange 120 formed at both ends of the web 110 Respectively.

When the guide beam 100 is installed, the lower end of the flange is fixed to the ground.

A seating groove 121 is formed in the flange 120 of the guide beam 100 at regular intervals. The seating groove 121 is a portion on which the supporting bar 370 installed in the PHC file 300 is seated, and forms a semicircular groove such that the supporting bar 370 stably seats. Since the spacing of the seating grooves 121 may vary depending on the standard of the PHC file 300 and the intervals at which the PHC files 300 are installed, a plurality of PHC files 300 may be installed at regular intervals so that the PHC files 300 can be installed without interference. Can be adjusted.

The seating groove 121 may be formed only at the upper end of the guide beam 100, or may be formed at both the upper end and the lower end.

The distance d between the seating grooves 121 at the upper end portion of the flange 120 of the guide beam 100 and the spacing D between the seating grooves 121 at the lower end portion of the guide beam 100 are different from each other, The PHC file 300 can be mounted with the upper end or the lower end of the flange 120 of the guide beam 100 directed upward depending on the standard.

In addition, the gap fixing member 140 may be coupled to the upper portion to connect the two parallel guide beams 100 to each other. This ensures that the two parallel guide beams 100 are maintained at a constant interval and are not separated from the installed position.

The gap fixing member 140 may be formed to have a U-shaped cross section. The gap fixing member 140 having a U-shaped cross section is formed with a plurality of grooves 141 corresponding to the flange 120 of the guide beam 100 at the opening side end portion thereof so as to be perpendicular to the guide beam 100 The groove 141 is fitted in the flange 120 of the spacer 100 so that the spacer 140 is engaged.

As described above, the two guide beams 100 can be coupled and fixed while maintaining a constant spacing as long as they are fitted and covered at the top of the guide beam 100 like a lid.

FIG. 8A is an exploded perspective view of a PHC file used in a method of constructing a pile for a deep-seated wall according to the present invention, and FIG. 8B is a side sectional view of a coupled state.

In general, the PHC file is formed with hollows 310 in the longitudinal direction of the central part, and the PC nuts 340 are formed at equal intervals in the upper and lower ends of the PHC file 300 in the form of a plurality of cylindrical sockets, A PC steel rod 350 is configured to connect the nut 340 and the lower PC nut 340.

8A, the PHC pile 300 according to the present invention is formed with grouting grooves 320 in the longitudinal direction of both sides facing each other. The grouting grooves 320 are formed at regular intervals in the upper end and at right angles to the grouting grooves 320 A through hole 330 penetrating horizontally is formed.

The grouting grooves 320 are formed by forming grooves on the outer periphery of the PHC pile 300. Two grouting grooves 320 are formed to face each other.

The grouting grooves 320 are formed in order to inject a grout material, which will be described later, upon construction of the PHC file 300.

The through hole 330 is configured to be perpendicular to the grouting groove 320.

The connecting member 400 is radially disposed and coupled with a cylindrical spacing member 430 connecting the upper disk plate 410 and the lower disk 420 and the central portion of the upper disk 410 and the lower disk 420, And a reinforcing piece 440.

The top plate 410 is formed in the same shape as the end face of the PHC pile 300 because the upper pawl 410 is coupled to the lower end of the PHC pile 300. In the portion corresponding to the PC nail 340 of the PHC pile 300, And grouting grooves 412 are formed on opposite sides of the grooves 411. The upper circular plate 410 may have a hollow at the center thereof.

The lower original plate 420 is formed in a disk shape, and grouting grooves 422 are formed on opposite sides of the lower original plate 420.

The grooves 412 of the upper circular plate 410 and the grouting grooves 412 of the lower circular plate 420 are formed in the shape of a cylinder and are coupled between the upper circular plate 410 and the lower circular plate 420, The upper and lower original plates 410 and 420 are integrally joined to each other.

The reinforcing pieces 440 are radially arranged around the gap material 430 between the upper and lower disks 410 and 420.

8B, when the coupling member 400 and the H-shaped steel 500 are coupled to each other, they can be welded to the lower circular plate 420 of the coupling member 400. However, An angle 510 having a cross section is welded to the lower end of the lower disk 420 of the connecting member 400 and the joining portion of the H-shaped steel 500 at the time of joining of the H- . The coupling hole 411 is formed in the upper end plate 410 of the coupling member 400 when the coupling member 400 is coupled with the PHC file 300, So as to be matched with the PC nut 340 of FIG.

FIG. 9 is a perspective view showing an embodiment in which a file is supported on a guide beam in a PICH file construction method for a deep-seated wall according to the present invention.

As shown in FIG. 9, the support bar 370 passes through the through-hole 330 of the PHC file 300 and is formed so as to expose both ends. Both ends of the support bar 370 are placed over the seating groove 121 of the guide beam 100. The grouting grooves 320 of the PHC file 300 coincide with the center line CL which is a planned earth retaining line on the ground and the through holes 330 become perpendicular to the center line CL.

As described above, according to the present invention, even when the upper part of the PHC file is mounted using a support bar and the lower end is free, It is possible to maintain the verticality of the file, and it is possible to maintain the same spacing between the PHC files by forming the seating grooves at regular intervals in the guide beams, and there is a very useful effect of keeping the columns of the PHC file constant.

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.

100: guide beam
110: web
120: Flange
121: seat groove
140:
141: Home
200: casing
210: Thousand public
300: PHC file
310: hollow
320: grouting groove
330: Through hole
340: PC nut
350: PC steel rods
360: blocking plate
370:
400: connecting member
500: H-beam

Claims

(a) a guide beam 100 which is spaced apart from the center line CL, which is a planned earthmoving line on the ground, and which is formed by H-shaped grooves at front and rear sides and formed with seating grooves 121 at regular intervals at the ends of the flanges, Installing;
(b) drilling a casing (200) by forming a cloth hole (210) by drilling a casing between the guide beam (100) and the guide beam (100) at regular intervals;
(c) grooved grooves 422 are formed on opposite sides of a circular plate-like upper plate 410 formed with grouting grooves 412 at opposite sides thereof and formed with through holes at regular intervals to form coupling holes 411 Shaped lower plate 420 and a cylindrical spacer 430 connecting the upper plate 410 and the central portion of the lower plate 420 and a cylindrical spacer 430 arranged radially between the upper plate 410 and the lower plate 420 The H-shaped steel 500 is joined to the lower end of the lower circular plate 420 of the connecting member 400 composed of the reinforcing pieces 440 to be joined,
A hollow 310 is formed in the longitudinal direction of the center portion, a grouting groove 320 is formed in the longitudinal direction of both sides of the center portion, and horizontally passes through the grouting groove 320 at a predetermined interval Coupling the upper disk 410 of the connecting member 400 to the lower end of the PHC file 300 in which the through hole 330 is formed;
(d) The PHC file 300 is drawn into the casing 200 and the support rod 370 is passed through the through hole 330 so that both ends of the support rod 370 are inserted into the seating grooves 121 of the guide beam 100 );
(e) Grout material is injected into the grouting grooves 320 of the PHC pile 300 so that the grout material is injected between the outer surface of the PHC pile 300 and the inner surface of the casing 200, So as to support the lower end of the PHC file 300;
(f) removing the casing (200);
(g) filling the inner hollow (310) of the PHC pile (300) with concrete. < RTI ID = 0.0 > 31. < / RTI >

The method according to claim 1,
wherein the spacing member (140) is coupled to the upper portion to interconnect the two parallel guide beams (100) in the step (a).

The method of claim 2,
The gap fixing member 140 has a C-shaped cross section and has a plurality of grooves 141 corresponding to the flange 120 of the guide beam 100 formed at the end of the opening to be perpendicular to the guide beam 100, Wherein the beam is pinched and coupled to the top of the beam (100).

The method according to claim 1,
the guide 220 is coupled to the inner upper end portion of the casing 200 so as to protrude inwardly at a portion intersecting the center line CL in step (b). In this case, Way.

The method according to claim 1,
(c), when the connecting member 400 and the H-shaped steel 500 are engaged, the angle between the lower end of the lower circular plate 420 of the connecting member 400 and the H- 510) are welded to each other so as to form a combined structure. A method of constructing a deep seated pile for a deep-seated wall.