KR101901091B1 - Steel plate inserting PHC Pile and retaining wall construction method - Google Patents

Abstract

The present invention provides a steel plate-embedded PHC pile and a retaining wall construction method to which the same is applied. According to the present invention, a steel plate is installed on a steel wire of a PHC pile without welding to provide structural safety and construction convenience. The section where no wale bracket is installed is built with a general PHC pile and the steel plate-embedded PHC pile is installed in the section where a wale bracket is installed, and thus it is possible to drastically reduce the cost of retaining construction. The steel plate-embedded PHC pile according to a preferred embodiment of the present invention includes a circular reinforcing net embedded in concrete and having a steel wire having a predetermined length, circularly arranged, and having an introduced tensile force and a tie hoop for steel wire connection; a wale bracket-joining steel plate disposed in a partial or the entire section of the PHC pile, placed in the length direction of the steel wire outside the reinforcing net, and either flat or round with the radius of curvature equal to the outer diameter of the PHC pile; and a steel wire connecting material connected to both ends of the wale bracket-joining steel plate with each one end joined at regular intervals and the other ends hooked on the steel wire without welding.

Description

Technical Field [0001] The present invention relates to a steel plate inserting PHC pile and retaining wall construction method,

The present invention relates to a steel plate embedded type PHC file and a method of constructing the earth retaining wall by applying the steel plate to a steel wire of a PHC file without welding to provide a structural safety and convenience of construction, The PHC file is installed in a general PHC file and the wrist bracket is installed in a steel plate. The PHC file includes a steel plate built-in type PHC file, which can dramatically reduce the cost of constructing a retention wall, and a method of constructing the earth retaining wall using the same.

Generally, the PHC file is produced by placing a round reinforcing net made of steel wire and strip rope in a mold, casting concrete, introducing a prestress into the steel wire, and then forming the wire by a centrifugal molding process. A general PHC file produced in this manner can be supplemented with various means for installing the wrist brackets in the retaining process. In this case, each means must be integrated into the PHC file and must be able to prevent damage to the concrete. Furthermore, welding is to be avoided when using a steel wire that forms a circular reinforcing net in the PHC file. When welding is performed on the steel wire, a deterioration stress is generated and a problem arises in introducing the prestress. Therefore, a PHC file should be made to install the wrist bracket in consideration of this point.

On the other hand, the following earth retaining method is known as a background technology of the present invention.

(1) A retaining method in which a perforation hole is drilled in a PHC file is known. However, in this method, the PHC file is circular. Due to the nature of the construction, it is difficult to adjust the height. Due to the large construction error due to the ground, it is difficult to fit the top and bottom and the left and right holes of the hole in the file when the file is installed after the file is punched. It can not be used, and it is supplemented by welding method instead of drilling or bolt type in the field. This may lead to defects such as bolt hole breakage or breakage, which may lead to problems in the structural safety of the file.

(2) A retaining method in which a steel pipe and a PHC file are mixed is known. In this case, the section where the bracket is not installed is installed as a general PHC file, and the line where the bracket is installed is secured by steel pipe construction to ensure safety. However, in this method, the steel pipe is a high price product, and the construction cost rises. In addition, since the existing prefabricated products are used, the PHC file and the diameter can not be unified, so that there is a possibility that the connection problem occurs when the wrist band is constructed.

(3) A retaining method is known in which a casting pile and a PHC pile are mixed. In this case, the section where the bracket is not installed is installed in the general PHC file, and the line where the bracket is installed is applied to the CIP construction in which the existing H-shaped steel is inserted. However, in this method, the retaining method using the PHC file is used to shorten the construction time and reduce the construction cost. However, the CIP construction with the existing H-shaped steel is applied to increase the construction cost, so that the original purpose can not be achieved.

(4) There is a retaining method in which steel pipe rings are installed outside the PHC file and mixed with existing PHC files. In this case, the section where the bracket is not installed is installed as a general PHC file, and the line where the bracket is installed is a PHC file having a steel pipe ring installed outside the PHC file. However, this method can not install steel pipe outside the PHC file after the file is installed, and it is very troublesome when the steel pipe ring is attached before installation of the file. The use of the large size casing increases the puncture ratio, There is concern about groundwater leakage due to this enlargement.

(5) There is a retaining method in which a bolt hole is provided in a PHC file, a steel plate is assembled from the outside, and the PHC file is mixed with existing PHC files. This is because the section where the bracket is not installed is installed in the general PHC file, and the line where the bracket is installed is the PHC file in which the steel plate is assembled. However, in this method, the process of assembling the steel plate outside the PHC file is added before the installation of the file, which makes it difficult to manage the site, and there is a fear that the bolt may be detached when the wale is installed, and the gap between the wale and the retention file There is a possibility that displacement of

Therefore, there is a need for an earth retaining method to solve the disadvantages and problems caused by these various methods.

As a background technique of the present invention, Korean Patent Registration No. 10-1302743 discloses a method of constructing a PE pile for a wall pile and an earth retaining wall using the same. This is because a straight surface is formed in the longitudinal direction on the outer circumferential surface of the PHC file and a PHC file in which a bolt fixing nut is embedded so that the steel plate can be fixed or a steel plate adhering to the straight surface is not separated is embedded in the bolt fixing nut And a permanent earth retaining wall or a permanent retaining wall is formed on a continuous excavation surface to support lateral pressure such as earth pressure or water pressure using the PHC file.

However, in the background art, there is a possibility that a bolt fixing nut is coupled only to a concrete layer, thereby causing a defect that the buried portion of the bolt fixing nut breaks or breaks. In this case, .

Korean Patent Registration No. 10-1302743

The present invention provides structural safety and ease of installation by installing the steel plate on the steel wire of the PHC file without welding, and the section where the wale bracket is not installed is installed in a general PHC file, and the section where the wale bracket is installed is purchased The present invention provides a PHC file embedded in a steel plate and a method of constructing the retained wall by applying the PHC file.

A steel plate embedded type PHC file according to a preferred embodiment of the present invention comprises a steel wire having a predetermined length and circularly arranged and having a tensile force introduced thereinto, a circular reinforcing net made of a steel rope connecting steel wires and embedded in concrete; A flat bracket or a round bracket having a radius of curvature equal to the outer radius of the PHC file and placed in the longitudinal direction of the steel wire on the outer side of the reinforcing steel net, A steel sheet for joining; And a steel wire connecting member having ends connected to both ends of the steel bracket for joining the wale bracket at regular intervals and the other end connected to the steel wire without welding.

Further, the steel wire connecting member has a semicircular hook portion which partially surrounds the outer circumferential surface of the steel wire.

Further, the steel wire connecting member is connected to the steel wire through a connecting ring in the middle; Wherein the linking ring includes a pair of ring bodies each of which is fitted in a ring connecting hole formed at the other end of the steel wire connecting member, a ring coupling nut for connecting the pair of ring bodies by a screw connection, And a locking lever rotatably pivotally coupled to one side and forcibly engaged with the other side.

In addition, the steel wire connecting member may include a lower connecting member having an L shape; An upper coupling member having a J-shape and having a semicircular hook portion with one end seated on the lower coupling member and the other end partially surrounding the outer peripheral surface of the steel wire; And a coupling bolt for coupling the lower coupling member and the upper coupling member.

Also, the steel wire connecting member is made of reinforcing steel.

Further, the steel strip for joining the wale bracket is further provided with a marking line on the outer surface to align the PHC pile in the longitudinal direction of the center.

Further, the steel strip for joining the wale bracket is further characterized in that a shear connector is further joined to the synthetic wall in order to construct the composite wall.

In order to increase the rigidity of the PHC file, the steel plate for joining the wale bracket and the steel wire connecting member are symmetrically arranged with respect to the center of the cross section.

Further, a steel plate fixing wedge is further provided, which is inserted between the back surface of the wale bracket bonding steel sheet and the belt root to fix the installation position of the steel sheet for braiding the wale bracket; The steel plate fixing wedge is constituted by a wedge holder portion for wrapping the strip rods in a semicircular shape, a wedge receiving portion closely contacting the steel plate for joining the wale bracket, and a wedge neck portion for connecting the wedge receiving portion and the wedge holder portion.

According to the steel plate buried type PHC file and the method of constructing the earth retaining wall using the same according to the present invention, the method comprises the steps of: (a) forming a perforation hole along a planned construction line on the ground; (b) penetrating the steel plate buried type PHC pile into the perforation hole at regular intervals; (c) penetrating a general PHC file in a prepared hole between adjacent steel plate built-in PHC files; (d) conducting order grouting on the back side of the main heating type wall installed with the selling type PHC file and the general PHC file; (e) joining the wale bracket to the steel plate for joining the wale bracket embedded in the steel plate embedded type PHC pile 10 after excavation to a certain depth around the main heating type wall; (f) supporting a wristband on the wrist bracket and connecting the wrist strap to the wristband; (g) The steps (c) and (d) are repeated until the target excavation.

According to the steel plate embedded type PHC file and the method of constructing the earth retaining wall applying the steel plate according to the present invention, the steel plate is not welded to the circular reinforcing steel net-side steel wire of the PHC file to prevent the structural safety of the PHC file. In addition, the wale bracket can be easily joined to the steel plate on the PHC file side, thus making the construction of the earth retaining wall convenient.

In addition, the section where the wale bracket is not installed can be installed with the general PHC file, and the section where the wale bracket is installed can drastically reduce the construction cost of the retention by installing the PHC file embedded in the steel plate.

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.
BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1A is a partially cut away perspective view of a steel plate buried type PHC file according to an embodiment of the present invention; FIG.
1B is a cross-sectional view of FIG.
Fig. 2 is an exploded perspective view of a circular reinforcing net applied to Fig. 1 (a) and a steel plate for joining wale brackets. Fig.
FIG. 3 is a view illustrating a state in which a steel plate for joining a wale bracket is connected to a steel wire connecting member according to a modified example of the present invention.
FIG. 4 is a view illustrating a state in which a steel plate for joining a wale bracket is connected to a steel wire connecting member according to another modification of the present invention. FIG.
FIG. 5 is a view illustrating a state in which a steel plate for joining a wale bracket is connected to a steel wire connecting member according to still another modification of the present invention. FIG.
FIG. 6A is a view illustrating a state in which a steel plate for joining a wale bracket is connected to a steel wire connecting member according to still another modification of the present invention. FIG.
FIG. 6B is a front view of the linkage applied to FIG. 6A. FIG.
FIG. 7 is a perspective view of a steel sheet for joining wale brackets according to the present invention, in which a shear connector is installed. FIG.
8 is a cross-sectional view of a steel plate buried type PHC file according to the present invention in which a steel plate for jointing a wale bracket is symmetrically installed.
FIG. 9A is a perspective view of a wale for fixing a steel strip to a steel strip for joining wale brackets according to the present invention, which is joined to a round steel bar. FIG.
FIG. 9B is a side view of FIG. 9A. FIG.
Fig. 9c is a perspective view of a steel plate for joining wale brackets according to the present invention, in which a steel plate fixing wedge is installed. Fig.
10A to 10E are views showing a construction procedure of an earth retaining wall to which a steel plate buried type PHC file according to the present invention is applied.

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.

As shown in Figs. 1 and 2, the steel plate embedded type PHC pile 10 according to the present invention comprises a steel wire 12a having a predetermined length and circularly arranged with a tensile force introduced thereinto and a strip rope 12b connecting the steel wire 12a The circular reinforcing net 12 is embedded in the concrete 11 to be manufactured.

The steel plate embedded type PHC file 10 is placed on the outside of the reinforcing net 12 in the longitudinal direction of the steel wire 12a, and a steel plate 14 for joining the wale bracket is provided. The installation of the wale bracket bonding steel plate 14 is performed together with the steel wire and the steel wire during the factory production process of the PHC file 10. The wale bracket bonding steel plate 14 is installed to weld the wale bracket 210 by welding. The wale bracket bonding steel sheet 14 may be a flat flat type as shown in Fig. 1A, or a round type having a radius of curvature R equal to the outer diameter of the PHC pile 10, as shown in Fig. 1C, have. The wale bracket bonding steel sheet 14 may be installed in the whole or part of a section of the PHC file. At this time, the width and thickness of the steel strip 14 for joining the wale bracket can be appropriately determined according to the sizes of the wale 220 and the wale bracket 210. [

A steel wire connecting member 16 is provided for joining the steel strip 14 for joining wale bracket to the steel wire 12a without welding. As shown in Fig. 2, the wire connecting members 16 are joined at both ends in the width direction at both ends in the width direction of the wale bracket bonding steel sheet 14, and the other end is attached to the steel wire 12a without welding.

The wire connecting member 16 may be constructed in various forms. As shown in FIGS. 2 and 3, the wire connecting member 16 may have a semicylindrical hook portion 16a which has a straight or bent shape and partially surrounds the outer circumferential surface of the steel wire 12a. At this time, the steel wire connecting member 16 may be made of reinforcing bars having concavo-convex as shown in Fig.

As shown in Fig. 5, the wire connecting member 16 has an L-shaped lower connecting member 161, a J-shaped one having one end seated on the lower connecting member 161 and the other end partially covering the outer peripheral surface of the steel wire 12a An upper coupling member 162 having a semicircular hook portion 162a and a coupling member fastening bolt 163 coupling the lower coupling member 161 and the upper coupling member 162. [

Meanwhile, the wire connecting member 16 may be connected to the steel wire 12a through the connecting hook 18 in the middle as shown in FIG. At this time, the linking ring 18 includes a pair of annular bodies 181 and 181, each of which is fitted in a linking hole 16b formed at the other end of the steel wire connecting member 16, and a pair of annular bodies 181 and 181, And a locking lever 183 rotatably pivotally coupled to one of the pair of ring bodies 181 and 181 and forcibly fitted to the other of the pair of ring bodies 181 and 181. [

As described above, in the present invention, since the steel wire connecting member 16 connects the steel strip 14 for joining the wale bracket to the steel wire 12a without welding, there arises a problem in the process of introducing the prestress during the manufacturing process of the PHC file 10 . This has the effect of preventing the generation of thermal stress beforehand because the steel wire 12a is subjected to a non-wearing contact.

1A, a marking line 158 may be further formed on the outer surface of the wale bracket bonding steel sheet 14 in order to align the PHC pile in the longitudinal direction of the center. The marking line 158 can be formed by applying yellow, for example, but it can be changed to a color that is noticeable to the operator according to the background color of the steel plate 14 for joining wale brackets.

In addition, the steel strip 14 for joining the wale bracket can be constructed by further joining the shear connector 18 to the joint wall in order to construct the composite wall.

Meanwhile, as shown in FIG. 8, the steel strip 14 for joining wale bracket and the steel wire connecting member 16 may be provided symmetrically with respect to the center of the cross section, in order to increase the rigidity of the PHC file 10.

As shown in Fig. 9, a steel plate fixing wedge 19 is inserted between the back surface of the wale bracket bonding steel sheet 14 and the belt rope 12b to fix the mounting position of the wale bracket bonding steel sheet 14 Can be installed. The steel plate fixing wedge 19 includes a wedge holder portion 191 for wrapping the strip rope 12b in a semicircular shape, a wedge receiving portion 192 which is in close contact with the steel strip 14 for joining the wale bracket, a wedge receiving portion 192, And a wedge neck portion 193 for connecting the portion 191.

In this case, the steel plate fixing wedge 19 is disposed between the wale bracket bonding steel sheet 14 and the strip rope 12b to fix the wale bracket bonding steel sheet 14. At this time, the steel plate fixing wedge 19 may be fixed by welding to the steel strip 14 for joining the wale bracket and the strip rope 12b.

The construction method of the earth retaining wall body applying the steel plate embedding type PHC file 10 constructed as described above will be described.

First, as shown in FIG. 10A, a plurality of perforation holes 102 are formed along the planned construction line on the ground. The perforation hole 102 may be formed by an auger drill rig.

Next, as shown in FIG. 10B, the steel plate embedding type PHC file 10 is inserted into the perforation hole 102 at regular intervals. At this time, if the marking line 15 is used, there is an advantage that the verticality of the steel plate embedded PHC file 10 can be secured. The interval at which the steel plate embedded PHC file 10 is installed can be determined according to the number of the general PHC files 200 installed between the neighboring steel plate built-in PHC files 10 and 10.

Next, as shown in FIG. 10B, the general PHC file 200 is inserted into the prepared hole between the neighboring steel plate built-in type PHC files 10 and 10. Thereafter, the steel plate built-in type PHC pile 10 can be filled with concrete to increase rigidity and bending resistance. In this manner, the main-heating type wall in which the steel plate embedding type PHC file 10 is installed at regular intervals in the general PHC file 200 is formed.

Next, as shown in FIG. 10B, degree grouting 205 is performed on the back surface of the main heating type wall constructed with the steel plate embedded type PHC file 10 and the general PHC file 200.

Then, as shown in Fig. 10C, the wale bracket 210 is joined to the wale bracket bonding steel plate 12 embedded in the steel plate embedded type PHC pile 10 after excavation to a certain depth with the main heating type wall as a boundary, The wrist strap 220 is supported on the wrist strap bracket 210 as shown in FIG. 10A and the strut strap 203 is connected to the wrist strap 220. This process is repeated until the target excavation.

The wristband bracket 210 can be provided with a dedicated bracket such as a T-bracket as well as a general bracket.

When the shear connection member 18 is provided on the wale bracket bonding steel sheet 12 as shown in FIG. 7, the composite wall can be formed by integrating the shear connection member 18 with the wall.

In addition, the steel plate embedding type PHC file 10 can be installed by attaching a steel pipe to the bottom of the pile in order to improve the entrapment property and improve the self-supporting property.

According to the method of constructing the earth retaining wall body applying the steel plate embedding type PHC file 10, the section where the wale bracket 210 is not installed is constructed with the general PHC file 200 and the section where the wale bracket 210 is installed The installation of the steel plate built-in type PHC file 10 has an advantage that the structural safety, the convenience of construction, and the price problem are remarkably improved.

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.

10: Steel plate built-in PHC file
12: Circular reinforcing mesh
12a: Steel wire
14: Steel plate for wale bracket joint
16: Steel wire connector
161: Lower connector
162: Upper connector
18: Connection ring
19: Wedge for steel plate fixing

Claims (10)

A circular reinforcing net 12 formed of a steel wire 12a having a predetermined length and circularly arranged with a tensile force introduced therein and a strip rope 12b connecting the steel wire 12a and embedded in concrete;
Or a round type having a radius of curvature equal to the outer diameter of the PHC file and placed in the longitudinal direction of the steel wire 12a on the outer side of the reinforcing net 12, A steel strip 14 for joining wale brackets arranged in a section;
A steel wire connecting member 16 having one ends joined at both ends of the steel bracket for joining the wale bracket 14 at regular intervals and the other end connected to the steel wire 12a without welding;
A wedge holder portion 191 for wrapping the strip rope 12b in a semicircular shape, a wedge receiving portion 192 which is in close contact with the steel strip 14 for joining the wale bracket, and a wedge receiving portion 192 and a wedge holder portion 191 And a wedge neck portion 193 which is inserted between the back face of the wale bracket bonding steel plate 14 and the belt rope 12b to fix the mounting position of the wale bracket bonding steel plate 14, (19). ≪ / RTI > The method according to claim 1,
Wherein the steel wire connecting member (16) has a semi-circular hook portion (16a) for partially covering an outer circumferential surface of the steel wire (12a). The method according to claim 1,
The wire connecting member 16 is connected to the steel wire 12a through the connecting hook 18 in the middle;
The linking ring 18 includes a pair of annular bodies 181 and 181 in which one is fitted into a linking hole 16b formed at the other end of the steel wire connecting member 16 and a pair of annular bodies 181 and 181, And a locking lever (183) rotatably pivotally coupled to one of the pair of ring bodies (181, 181) and forcibly fitted to the other of the pair of ring bodies (181, 181) Type PHC file. The method according to claim 1,
The steel wire connecting member (16)
A lower linking member 161 having an L-shape;
An upper joint 162 having a J-shaped shape and having a semicircular hook portion 162a having one end seated on the lower joint 161 and the other end partially covering the outer circumferential surface of the steel wire 12a; And
And a coupling member fastening bolt (163) for coupling the lower coupling member (161) and the upper coupling member (162). 3. The method of claim 2,
Wherein the steel wire connecting member (16) is made of reinforcing steel. The method according to claim 1,
And a marking line (158) is further formed on the outer surface of the wale bracket bonding steel sheet (14) so as to match the application accuracy of the PHC file in the longitudinal direction of the center. The method according to claim 1,
Wherein the wale bracket bonding steel sheet (14) is further bonded with a shear connector (18) in a double row for constructing a synthetic wall. The method according to claim 1,
A steel plate embedded type PHC file, characterized in that the steel strip connecting plate for braiding the wale bracket (14) and the steel wire connecting member (16) are provided symmetrically with respect to the center of the cross section for increasing the rigidity of the PHC file (10). delete (a) forming a perforation hole (102) along a planned construction line on the ground;
(b) penetrating the steel plate buried type PHC pile 10 having the structure described in claim 1 at a predetermined interval into the perforation hole 102;
(c) penetrating the general PHC file (200) into the perforation hole (102) prepared between adjacent steel plate embedded PHC files (10 and 10);
(d) performing order grouting on the back side of the main heating type wall installed with the selling type PHC file (10) and the general PHC file (200);
(e) joining the wale bracket 210 to the steel plate 12 for joining the wale bracket embedded in the steel plate embedded type PHC pile 10 after excavation to a predetermined depth around the main heating type wall;
(f) supporting the wale 220 on the wale bracket 210 and connecting the strand 203 to the wale 220;
(g) The step (c) and the step (d) are repeated until the target excavation. The method of constructing the earth retaining wall by applying the PHC file embedded in the steel plate.

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