KR102264594B1 - Phc pile for soil retaining wall - Google Patents

Abstract

The PHC pile for retaining wall according to the embodiment of the present invention is used for the construction of the retaining wall, and the PHC pile body having a plurality of PC steel wires is embedded in the concrete constituting the PHC pile body when the PHC pile is manufactured. An insert panel member installed in a state of being installed and disposed to expose a front part to one side of the PHC pile body, and a structure protruding toward the inside of the PHC pile body on the insert panel member, and when manufacturing the PHC pile and an insert reinforcing member installed in a state of being buried together with the insert panel member in the concrete constituting the PHC pile body and reinforcing the bonding force between the insert panel member and the PHC pile body.

Description

PHC pile for retaining wall {PHC PILE FOR SOIL RETAINING WALL}

The present invention relates to a PHC pile for a retaining wall, and more particularly, to a PHC file for a retaining wall that can install a wale in a plurality of PHC piles very firmly and stably, as well as reinforce the strength of the PHC pile will be.

When the foundation of a building or civil engineering structure is placed on a soft ground, a pile, which is a deep foundation, is buried to the support layer to secure bearing capacity and stabilize the foundation. The types of piles as described above are very diverse depending on materials such as wood, steel, and concrete. In addition, the piles are installed by various construction methods such as driving, driving after excavation, and the like.

On the other hand, the retaining method is classified in various ways according to the type of retaining wall for maintaining the independence of the soil at the back and the type of support (bracing) for structurally supporting it.

The currently widely used retaining walls include H-beam steel + earth pipe (wood), sheet pile, cast in place concrete pile (CIP), and cast-in-place cement retaining wall (SCW: Soil Cement Wall). ), underground continuous walls (Diaphragm Wall, Slurry Wall), and the like, and types of support methods include brace method, ground anchor method, soil nailing method, etc.

H-beam steel + earth plate is installed where groundwater does not exist, and the rest of the construction methods are used where groundwater exists. For the retaining wall composed of H-beam steel + earth plate, the ground is drilled using auger equipment and the H-beam steel is installed along the excavation surface boundary at a predetermined interval, and the earth plate is inserted between both H-beams at the same time as the excavation. As a wall method, wood is mainly used for earth plates.

The steel pile pile is a method of forming a temporary retaining wall by continuously installing sheet pile sections to be inserted into the ground with a vibrating hammer drill and interlocked with each other.

For cast-in-place concrete piles (CIP), the ground is drilled using auger equipment, and H-beams are drilled along the excavation surface boundary at predetermined intervals, and drilled in the same way in between, assembling and inserting a reinforcing bar network. It is a construction method that forms a temporary wall by making piles by pouring cement mortar or concrete on site.

Cast-heated soil cement retaining wall (SCW) uses a triaxial auger equipment to drill three holes in the ground and at the same time add and stir cement mortar to form a soil-cement mixed pile in the ground, and put H-beam steel in one hole. It is a construction method that forms a temporary retaining wall by inserting at intervals and repeatedly constructing it so that it is bitten one by one.

For the underground continuous wall, the ground of the wall part is excavated while injecting a stabilizing solution (bentonite) to prevent the collapse of the excavation surface and the penetration of groundwater, and the reinforced concrete continuous wall is formed in the ground by inserting the assembled reinforcing bar network and pouring the concrete. it's a technique

The retaining wall as described above is a temporary structure constructed for the purpose of resisting lateral pressure such as earth pressure and water pressure during underground excavation construction for the purpose of constructing an underground structure, and for the purpose of subsidence of the surrounding ground and protection of adjacent structures. Retaining walls are being constructed for the purpose of subsidence of the surrounding ground or building protection as excavation works in downtown areas have become more frequent in recent years, and the purpose of use is gradually diversifying.

On the other hand, among various types of piles, wood and precast concrete piles (PC piles) have low economic efficiency and workability, so PHC piles (Prestressed High-strength Concrete pile) having relatively excellent workability and stability are used a lot. In particular, PHC piles are high-strength concrete piles for construction, and are widely used in buildings and civil structures that mainly support vertical forces with little horizontal force, and therefore, technology development of PHC piles has been actively developed in recent years.

For example, in Korean Patent No. 10-0913569 (title of invention: PHC file for retaining wall, registration date: August 17, 2009), PHC that can easily construct a continuous retaining wall by changing the shape and structure of the cross section A description of the file is disclosed.

For reference, recently, in order to overcome the small horizontal resistance of PHC piles when using PHC piles, composite piles or composite piles are frequently used. The composite pile has a structure combining both with a steel plate applied to the upper part where bending and shearing sectional forces are large, and a PHC pile applied to the lower part where only axial force is applied. Composite pile is a structure in which bending and shearing are reinforced by reinforcing reinforcing bars and filling concrete after the pile is manufactured with the shear connector installed inside the upper part of the PHC pile.

As described above, many PHC piles are used in the construction of retaining walls, and the PHC piles are constructed in a structure in which a plurality of PHC piles positioned adjacent to each other are connected using a wale. Recently, there is a demand for a technology for installing the wale more securely and safely so that the wale installed on a plurality of PHC piles can support a high load.

An embodiment of the present invention provides a PHC pile for a retaining wall that can stably use a high-load wale by installing a wale or a wale bracket in a plurality of PHC piles forming a retaining wall.

In addition, an embodiment of the present invention provides a PHC pile for a retaining wall that can firmly fix a wale or a wale bracket to a panel embedded in the PHC pile by welding.

In addition, an embodiment of the present invention provides a PHC pile for retaining wall that can reinforce the strength of the PHC pile by the panel embedded in the panel embedded in the PHC pile.

The present invention relates to a PHC pile for a retaining wall used for the construction of a retaining wall.

According to an embodiment of the present invention, the PHC pile body in which a plurality of PC steel wires are embedded, is installed in a state embedded in the concrete constituting the PHC pile body when the PHC pile is manufactured, and is installed on one side of the PHC pile body An insert panel member disposed to be exposed, and a structure protruding toward the inside of the PHC pile body on the insert panel member, and with the insert panel member in concrete constituting the PHC pile body when the PHC pile is manufactured It provides a PHC pile for retaining wall installed in a buried state and including an insert reinforcement member for reinforcing the bonding force between the insert panel member and the PHC pile body.

Preferably, the insert reinforcing member may be integrally formed with the insert panel member, and at least one or more may be provided in the insert panel member.

Preferably, the insert panel member may be formed in a rectangular panel shape elongated in the longitudinal direction of the PHC pile body, and a single or a plurality of pieces may be provided on one side of the PHC pile body to be spaced apart from each other. can

Preferably, the insert reinforcing member may be formed at at least one of both ends of the insert panel member.

The disposition angle formed between the insert reinforcing member and the insert panel member may be provided in an angle range of 90 degrees or more to less than 180 degrees.

Here, the insert reinforcing member may be disposed at both ends of the insert panel member, respectively, and may be formed in a cross-sectional shape that spreads to both sides toward the inside of the PHC pile body.

In addition, at least a portion of the insert reinforcing member may form a bent portion bent at a set angle or a set curvature, or may provide at least one concave-convex portion on the surface.

Preferably, the insert reinforcing member may be formed with a coupling hole for increasing coupling force with the PHC pile body. Concrete constituting the PHC pile body may be disposed in communication with the coupling hole portion when the PHC pile is manufactured.

A reinforcing wire may be disposed in the coupling hole portion in a shape penetrating the coupling hole portion, so that coupling force between the insert reinforcing member and the PHC pile body may be improved.

Preferably, at least one of a band belt or a band band bracket may be fixed to the front portion of the insert panel member by welding.

On the other hand, the PHC pile for retaining wall according to an embodiment of the present invention is installed in a state embedded with the insert panel member and the insert reinforcement member together with the insert panel member and the insert reinforcement member in the concrete constituting the PHC pile body when the PHC pile is manufactured. It may further include an insert nut member disposed in close contact with the rear surface of the insert panel member.

Here, the insert nut member may fix the positions of the insert panel member and the insert reinforcing member together with a position fixing bolt in the PHC pile mold used for manufacturing the PHC pile in the process of pouring and curing the concrete. have.

In addition, the insert panel member may be formed with a through hole through which the position fixing bolt is disposed.

In addition, the through-hole portion may be formed in a slot shape to compensate for a fastening tolerance with the insert nut member.

In the PHC pile for retaining wall according to an embodiment of the present invention, a wale or wale bracket can be installed very firmly and stably in a plurality of PHC piles forming a retaining wall, and the strength of the PHC pile can be simply reinforced. have.

In addition, since the PHC pile for retaining wall according to the embodiment of the present invention has a structure in which an insert panel member is disposed in a buried shape in which the front part is exposed on one side of the PHC pile body, a wale or wale bracket is attached to the front part of the insert panel member It can be fixed firmly and easily by welding method. Accordingly, in the present embodiment, a high-load wale can be stably applied to a plurality of PHC piles.

In addition, since the PHC pile for retaining wall according to the embodiment of the present invention has a structure in which the insert panel member and the insert reinforcement member are disposed in a buried shape inside the PHC pile body, the insert panel member and the insert reinforcement member act on the PHC pile It is possible to further improve the resistance of the horizontal force.

In addition, the PHC pile for retaining wall according to the embodiment of the present invention has a structure that further improves the bonding force between the insert panel member and the PHC pile body by forming an insert reinforcement member on the insert panel member, so that the insert panel member is installed in the PHC pile body. The phenomenon of arbitrarily detaching can be prevented in advance, so that a high-load wale can be stably installed on the insert panel member.

In addition, since the PHC pile for retaining wall according to the embodiment of the present invention has a structure in which a coupling hole portion through which the concrete constituting the PHC pile body is disposed in communication is formed in the insert reinforcing member, the bonding force between the PHC pile body and the insert reinforcing member is increased. This can be significantly improved, and the occurrence of cracks around the insert reinforcing member can also be prevented.

In addition, since the PHC pile for retaining wall according to the embodiment of the present invention is formed in a shape in which the insert reinforcement members provided at both ends of the insert panel member are opened in the inside of the PHC pile, the insert nut member and the position fixing for the manufacture of the PHC pile The operation of fixing the insert panel member to the inside of the PHC pile mold using bolts can be performed smoothly without being disturbed by the insert reinforcement member.

1 is a perspective view showing a retaining wall using a PHC pile according to an embodiment of the present invention.
Figure 2 is a view showing the PHC file for retaining wall shown in Figure 1.
3 and 4 are views showing another example of the PHC pile for the retaining wall shown in FIG.
FIG. 5 is a view showing a cross-section taken along line AA shown in FIG. 2 .
FIG. 6 is a view showing a cross section taken along line BB shown in FIG. 2 .
7 is a perspective view illustrating the insert panel member and the insert reinforcement member shown in FIG. 6 .
8 is a view showing another example of the insert reinforcement member shown in FIG.
9 is a cross-sectional view showing a PHC pile for a retaining wall according to another embodiment of the present invention.
10 is a view showing another example of the insert reinforcement member shown in FIG.

Hereinafter, embodiments according to the present invention will be described in detail with reference to the accompanying drawings. However, the present invention is not limited or limited by the examples. Like reference numerals in each figure indicate like elements.

1 is a perspective view showing a retaining wall 10 using a PHC pile 100 according to an embodiment of the present invention, and FIG. 2 is a view showing the PHC file 100 for the retaining wall shown in FIG. 1, 3 and 4 are views showing another example of the PHC pile 100 for the retaining wall shown in FIG. FIG. 5 is a view showing a cross section taken along line A-A shown in FIG. 2 , and FIG. 6 is a view showing a cross section taken along line B-B shown in FIG. 2 . 7 is a perspective view illustrating the insert panel member 130 and the insert reinforcing member 140 shown in FIG. 6 , and FIG. 8 is a view showing another example of the insert reinforcing member 140 shown in FIG. 6 .

Referring to FIG. 1 , a PHC pile 100 for a retaining wall according to an embodiment of the present invention may be used in the construction of a retaining wall 10 .

In general, the retaining wall 10 may include a PHC pile 100 for a retaining wall, a wale 20, and a wale bracket 30 .

Here, a plurality of PHC piles 100 for retaining walls of the present embodiment may be installed at predetermined intervals in the ground (not shown). As described above, the number of PHC piles 100 installed in the ground may vary depending on the size of the retaining wall 10 to be created.

A plurality of PHC piles 100 may be installed in a line along a desired boundary of the ground. In this case, the PHC file 100 may be disposed to be spaced apart from each other at a predetermined interval from other PHC files 100 adjacent to each other.

In addition, the wale 20 may be installed in a horizontal direction at an appropriate height of the plurality of PHC piles 100 . Accordingly, the plurality of PHC piles 100 are bound to each other by the wale 20 and may be stably disposed on the ground.

The wale 20 as described above may be directly installed as a fastening member 150 to a plurality of PHC piles 100, but in this embodiment, the wale 20 is a wale bracket disposed in a plurality of PHC piles 100 ( 30) is described as being installed. That is, the wale 20 may be connected to the plurality of PHC files 100 via the wale bracket 30 .

In addition, the wale bracket 30 may be installed in each of the plurality of PHC piles 100 connected by the wale 20 . The wadding bracket 30 as described above may be all individually arranged in the plurality of PHC piles 100 , but in this embodiment, the wale band bracket 30 is selectively arranged for every predetermined number of the plurality of PHC piles 100 . It is possible to prevent a serious increase in the number of use and installation work of the wadding bracket 30 .

The wale 20 is a member performing a beam function arranged horizontally in the horizontal direction, and the wale bracket 30 is a member performing a beam hanger function supporting the wale 20 . The wale bracket 30 as described above may be formed in various structures for supporting the wale belt 20 in the form of a beam, but a detailed description thereof will be omitted in this embodiment.

The wadding bracket 30 may be very firmly fixed by welding while in close contact with the front portion of the insert panel member 130 to be described later. Therefore, the wale bracket 30 can support the wale 20 of a high load very stably. In particular, in recent years, among the construction methods of the retaining wall 10 , a high-load wale 20 must be applied, and the method of fixing the wale bracket 30 to the PHC pile 100 using a fastening member as in the prior art is high. The belt length 20 in the middle could not be supported. On the other hand, since the method of fixing the wale bracket 30 to the PHC pile 100 by welding as in the present embodiment can sufficiently support a high load, the wale 20 of a high load can be used.

Hereinafter, the configuration and effect of the PHC pile 100 for retaining wall according to the present embodiment will be described in detail.

1 to 8, the PHC pile 100 for retaining wall according to an embodiment of the present invention, the PHC pile body 110, the insert nut member 120, the insert panel member 130, and the insert A reinforcing member 140 may be included.

Here, the PHC pile body 110 may be made of a concrete material, and the insert nut member 120 , the insert panel member 130 , and the insert reinforcement member 140 may be made of a metal material.

In addition, the PHC pile body 110 has very good resistance to the compressive force applied vertically, but the resistance to the horizontal force applied horizontally may be relatively weak. On the other hand, since the insert panel member 130 and the insert reinforcing member 140 are made of a metal material having a very excellent resistance to horizontal force than a concrete material, the insert panel member 130 and the insert reinforcing member 140 are combined with the PHC pile body ( It is also possible to further improve the resistance to the horizontal force of the PHC pile body 110 by disposing it in a buried structure in the 110).

As shown in Figures 1 to 5, the PHC pile body 110 of this embodiment may be elongated in a cylindrical shape with a hollow inside. The PHC pile body 110 as described above may form a retaining wall 10 by arranging a plurality of PHC piles spaced apart from each other at regular intervals on the ground.

For example, the PHC pile body 110 may include a pile body 112 , a PC steel wire 114 , an insert hole portion 116 , and a band band 118 .

The pile body 112 is a cylindrical member formed of a concrete material, and a hollow portion 112a may be formed in the pile body 112 in the longitudinal direction. The hollow portion (112a) may be formed in a shape penetrating the central portion of the file body (112) in the longitudinal direction.

The PC steel wire 114 is a member for reinforcing the strength of the PHC pile body 110 , and may be disposed in a structure embedded in the pile body 112 . In particular, the PC steel wire 114 may provide a prestress to the PHC pile body 110 to reinforce the strength against the compressive force. A plurality of PC steel wires 114 may be provided to be spaced apart from each other along the circumference of the pile body 112 . The plurality of PC steel wires 114 as described above may be welded and fixed in a spirally wound structure in which an iron wire (not shown) is wound. On the other hand, the PC steel wire 114 and the iron wire can be poured concrete into the inside of the PHC pile mold in a state in which the PHC pile mold used for manufacturing the PHC pile 100 is previously arranged.

The insert hole 116 may be formed in a groove shape or a hole shape on one side of the pile body 112 . As shown in FIG. 5 , the insert nut member 120 may be disposed inside the insert hole part 116 in a buried structure. A plurality of insert hole portions 116 as described above may be arranged in a line at one side of the pile body 112 to be spaced apart from each other along the longitudinal direction of the pile body 112 .

The band band 118 is a member provided at the upper end of the pile body 112 , and may be formed in a band shape or a band shape of a metal material to finish the upper end of the PHC pile body 110 .

2 and 5 , the insert nut member 120 of the present embodiment may be respectively disposed in a structure embedded in a plurality of insert holes 116 formed on one side of the PHC pile body 110 . On the other hand, in this embodiment, when the PHC pile 100 is manufactured, concrete is poured and cured in a state in which the plurality of insert nut members 120 are pre-arranged inside the PHC pile mold. Accordingly, a plurality of insert holes 116 may be formed on one side of the PHC pile body 110 .

The insert nut member 120 is fastened with the fastening member 150 to be utilized for various purposes in the PHC pile 100 . That is, after the fastening member 150 is inserted into the insert hole part 116 , it may be fastened with the insert nut member 120 disposed inside the insert hole part 116 . However, in this embodiment, the insert nut member 120 and the fastening member 150 are not utilized for the installation of the wale 20, and the details thereof will be described again below.

Meanwhile, the fastening member 150 may be formed in a bolt structure having a male screw portion, and the insert nut member 120 may be formed in a nut structure having a female screw portion fastened to the male screw portion of the fastening member 150 .

1, 2, 5 and 6, the insert panel member 130 of this embodiment is disposed in a structure embedded in one side of the PHC pile body 110, the PHC pile body 110 It may be embedded in one side of the PHC pile body 110 in a state in which the front part is exposed to the outside of the . Meanwhile, since the insert panel member 130 is disposed on one side of the PHC pile body 110 , it may be disposed to cover a part of the insert hole parts 116 formed on one side of the PHC pile body 110 .

A plurality of insert panel members 130 may be disposed on one side of the PHC pile body 110 to be spaced apart from each other in the longitudinal direction of the PHC pile 100 . The size, shape, number of arrangement, and the separation distance between the insert panel members 130 as described above may be variously set according to the design conditions and circumstances of the PHC pile 100 for the retaining wall.

For example, the insert panel member 130 of this embodiment may be formed to a size that can cover the two insert hole portions 116 , and two insert hole portions 116 on one side of the PHC pile body 110 . It may be respectively disposed on a portion covering the. However, the present invention is not limited thereto, and the insert panel member 130 may be sized to cover three or more insert hole portions 116 or may be disposed at a position that does not cover the insert hole portion 116 .

In addition, the insert panel member 130 may be formed in a panel structure of various shapes, such as polygonal, circular, oval, or belt-shaped. Hereinafter, for convenience of explanation, in this embodiment, the insert panel member 130 is described as being formed in a rectangular panel shape elongated in the longitudinal direction of the PHC pile body 110, but the present embodiment is not limited thereto. It may be changed to another shape according to the design conditions and circumstances of (100). Meanwhile, the insert panel member 130 according to the present embodiment may be disposed on one side of the PHC pile body 110 , and may be disposed to be elongated in a direction corresponding to the longitudinal direction of the PHC pile body 110 .

On the other hand, at least one of the belt belt 20 and the belt belt bracket 30 may be fixed to the front portion of the insert panel member 130 by welding. However, as described above, in this embodiment, it will be described that the wale bracket 30 is fixed to the front portion of the insert panel member 130 by welding. Therefore, since the wale bracket 30 is welded in close contact with the front portion of the insert panel member 130 having a flat shape, it can be more stably installed in the pile body 112 of the PHC pile body 110 .

A through hole 132 communicating with the insert hole 116 may be formed in the insert panel member 130 . That is, the insert panel member 130 has a structure provided on one side of the PHC pile body 110 in a shape to cover the two insert hole portions 116 , and a through hole portion 132 at a position corresponding to the two insert hole portions 116 . ) may be formed respectively.

As described above, the plurality of insert hole portions 116 may be exposed to the outside without being shielded by the insert panel member 130, and accordingly, the insert nut member 120 disposed inside the insert hole portion 116 is required. It can be used for a variety of purposes. For example, in the present embodiment, the position of the insert panel member 130 disposed inside the PHC pile mold when the PHC pile 100 is manufactured using the through hole 132 and the insert nut member 120 is stably positioned. can be fixed

Specifically, when the PHC pile 100 is manufactured, after the insert panel member 130 is installed in advance in the PHC pile mold, the concrete constituting the PHC pile body 110 is poured into the inside of the PHC pile mold. Also, the PHC pile body 110 may be manufactured in a structure in which the insert panel member 130 is embedded by curing the concrete while rotating the PHC pile mold. At this time, the position fixing bolt is fastened to the bolt hole of the PHC pile mold for the purpose of fixing the insert panel member 130 inside the PHC pile mold, and the position fixing bolt passes through the through hole 132 and then the insert nut The position of the insert panel member 130 may be fixed together with the insert nut member 120 by being coupled to the member 120 .

Here, the through hole 132 may be formed in a slot shape to compensate for a fastening tolerance with the insert nut member 120 . The through hole 132 as described above may be formed to be long in the longitudinal direction of the PHC pile body 100 . Therefore, in the process of installing the insert panel member 130 and the insert nut member 120 inside the PHC pile mold during the manufacturing of the PHC pile 100, even if the position of the PHC pile body 110 in the longitudinal direction is partially shifted, the penetration It can be sufficiently compensated by the hole 132 .

For reference, various modifications of the PHC pile 100 for retaining walls in which the insert panel member 130 is disposed in a buried shape are shown in FIGS. 3 and 4 .

The PHC pile 100 for retaining wall shown in FIG. 3 has a structure in which a plurality of insert panel members 130 shown in FIG. 2 are integrally coupled to a single insert panel member 130 ′. Accordingly, the insert panel member 130 ′ shown in FIG. 3 may be formed to be very long in the longitudinal direction of the PHC pile body 110 than the insert panel member 130 shown in FIG. 2 . Since the PHC pile 100 for retaining wall shown in FIG. 3 has a structure in which a single insert panel member 130' is embedded, the operation of installing the insert panel member 130' inside the PHC pile mold is shown in FIG. 2 It can be done more quickly and simply than the insert panel member 130 shown in FIG. In addition, the PHC pile 100 for the retaining wall shown in FIG. 3 may further maximize the resistance of the PHC pile 100 to the horizontal force than the insert panel member 130 shown in FIG. 2 .

The PHC pile 100 for retaining wall shown in FIG. 4 is different from the pile body 112 of the PHC pile body 110 shown in FIG. 2 , the pile body 112 ′ of the PHC pile body 110 is flat. A portion 112b may be formed. The flat portion 112b may be formed in a portion where the insert panel member 130 is not disposed among one side of the file body 112 ′, and to be formed in the same planar shape as the front portion of the insert panel member 130 . can Accordingly, the wale bracket 30 may be more stably installed in the pile body 112 of the PHC pile body 110 .

6 to 8 , the insert reinforcing member 140 of the present embodiment may be formed in a structure protruding toward the inside of the PHC pile body 110 in the insert panel member 130 . As described above, the insert reinforcing member 140 may reinforce the bonding force between the insert panel member 130 and the PHC pile body 110 .

The insert reinforcing member 140 may be integrally formed with the insert panel member 130 , and at least one or more may be provided in the insert panel member 130 . That is, the insert reinforcing member 140 and the insert panel member 130 may be integrally manufactured by processing a metal material of the same material. In addition, only a single insert reinforcing member 140 may be provided on the insert panel member 130 , or a plurality of insert reinforcing members 140 may be provided separately at different positions.

For example, the insert reinforcing member 140 may be formed in a rectangular panel shape elongated along the longitudinal direction of the PHC pile body 110 , like the insert panel member 130 . In the present embodiment, it will be described that the insert reinforcing member 140 is formed to protrude from only one end of both ends of the insert panel member 130 . Therefore, as shown in FIG. 7 , the insert reinforcing member 140 and the insert panel member 130 include a through hole 132 and a coupling hole 142 to be described later in a single metal panel cut to an appropriate size. After drilling, it can be manufactured integrally by bending along the bending line.

In this case, the arrangement angle θ formed between the insert reinforcing member 140 and the insert panel member 130 may be provided in an angle range of 90 degrees or more to less than 180 degrees. Preferably, the arrangement angle θ may be provided in an angle range of 90 degrees or more to 140 degrees or less. If the disposition angle θ becomes smaller than 90 degrees, the insert reinforcing member 140 may interfere with the insert nut member 120 or interfere with the insert nut member 120 because the insert reinforcing member 140 approaches the rear portion of the insert panel member 130 . may interfere with installation work. In addition, when the disposition angle (θ) becomes greater than 180 degrees, the insert reinforcing member 140 may not be completely embedded in the PHC pile body 110 and may be exposed to the outside of the PHC pile body 110 .

On the other hand, the insert reinforcing member 140 may be formed with a coupling hole 142 for increasing the coupling force between the PHC pile body 110 and the insert reinforcing member 140 . A single or a plurality of coupling hole portions 142 as described above may be formed in the insert reinforcing member 140 in various shapes and arrangements. Hereinafter, in the present embodiment, it will be described that the coupling hole 142 is formed in a circular shape and a plurality of the insert reinforcing member 140 is provided to be spaced apart from each other.

Accordingly, a portion of the concrete constituting the PHC pile body 110 may be disposed in the coupling hole portion 142 to communicate with each other when the PHC pile 100 is manufactured. Specifically, when concrete is poured while the insert reinforcement member 140, the insert panel member 130, and the insert nut member 120 are installed inside the PHC pile mold during the manufacture of the PHC pile 100, the concrete is inserted It may be cured while being introduced into the coupling hole 142 of the reinforcing member 140 .

As described above, a portion of the pile body 112 of the PHC pile body 110 may form the connection part 113 in a structure disposed in communication with the inside of the coupling hole part 142 . The connection part 113 of the pile body 112 can increase the coupling force between the PHC pile body 110 and the insert reinforcing member 140, as well as to the pile body 112 based on the insert reinforcing member 140. It can also prevent the occurrence of cracks and separation phenomena.

In particular, the reinforcing wire 144 may be disposed in the coupling hole portion 142 in a shape penetrating the coupling hole portion 142 . The reinforcing wire 144 may be provided to penetrate through the coupling hole 142 before the concrete is poured when the PHC pile 100 is manufactured. A single or a plurality of reinforcing wires 144 may be disposed in the coupling hole 142 . When the reinforcing wire 144 as described above is provided in the coupling hole 142, the coupling force between the PHC pile body 110 and the insert reinforcing member 140 can be further improved, as well as the strength of the connection part 113 and the connection part. (113) It is possible to more stably support the load applied to the insert reinforcing member 140 by reinforcing the surrounding strength.

Meanwhile, another example of the insert reinforcing member 140 is shown in FIG. 8 .

The insert reinforcing member 140 ′ illustrated in FIG. 8 has a structure in which the bent portion 146 and the concavo-convex portion 148 are further provided compared to the insert reinforcing member 140 illustrated in FIG. 6 . When the bent portion 146 and the concave-convex portion 148 are provided on the insert reinforcing member 140 ′ as described above, the coupling force between the insert reinforcing member 140 ′ and the PHC pile body 110 may be further increased.

Here, the bent portion 146 may be formed in a structure in which at least one portion of the insert reinforcing member 140 ′ is bent at a set angle or a set curvature. For example, the insert reinforcing member 140 ′ may be formed in a repeated bending structure such as a step shape, a zigzag shape, or a wavy shape, or may be formed in a structure in which only a specific portion is bent, or the entirety is bent in a gentle curved shape. can As described above, at least one bent portion 146 may be formed in the insert reinforcing member 140 ′, but in the present embodiment, a single bent portion 146 is formed at the end of the insert reinforcing member 140 ′. described as

In addition, the concave-convex portion 148 may be formed in a structure in which at least one protrudes or is depressed on the surface of the insert reinforcing member 140 ′. The concave-convex portion 148 may be formed in various concavo-convex structures on the surface of the insert reinforcing member 140', but in this embodiment, a plurality of concave-convex portions 148 are formed on both sides of the insert reinforcing member 140' in a protrusion shape. described as being placed.

The construction process of the retaining wall 10 using the PHC pile 100 for retaining wall according to an embodiment of the present invention configured as described above and the manufacturing method of the PHC file 100 for retaining wall will be described as follows.

First, the process of constructing the retaining wall 10 using the PHC pile 100 for the retaining wall according to the present embodiment will be described.

A plurality of PHC piles 100 are installed at predetermined intervals with respect to the ground, and excavation work is performed on the ground. The excavation work is carried out on one side of the PHC pile 100 where earth pressure is not applied.

Then, the wale bracket 30 is installed in the plurality of PHC piles 100 , and the wale 20 is installed in the wale bracket 30 to stably bind and support the plurality of PHC piles 100 . The wale bracket 30 and the wale belt 20 are sequentially installed at a predetermined height in the plurality of PHC piles 100 as the excavation construction progresses.

Looking at the installation process of the wale bracket 30, the wale bracket 30 is in close contact with the front part of the insert panel member 130 disposed on one side of the PHC pile body 110 of the PHC pile 100, (30) is welded to the front portion of the insert panel member (130).

Therefore, since the wale bracket 30 and the insert panel member 130 are connected very firmly, the design load of the wale bracket 30 is very high to stably support the wale 20 of the high load.

On the other hand, the manufacturing method of the PHC pile 100 for retaining wall according to the present embodiment will be briefly described as follows.

A PHC pile mold providing a space in which the concrete constituting the PHC pile body 110 is poured is provided. The PHC pile mold as described above is manufactured in the form of a cylinder with an empty interior.

The PHC pile mold is provided in a structure separated into an upper mold and a lower mold for convenience in manufacturing the PHC pile 100 . The upper mold and the lower mold are formed identically to each other in a shape and a length having a semicircular cross-section. At this time, a bolt hole is formed in the upper mold in which a bolt for fixing a position formed in the same shape as that of the fastening member 150 is installed. The bolt hole as described above is formed at a position corresponding to the arrangement position of the insert hole 116 of the PHC pile body 110 .

Install the position fixing bolts into the bolt holes of the PHC pile mold, respectively. At this time, the male thread portions of the bolts for fixing the position are in a state protruding from the inner space of the PHC pile mold.

Then, the insert panel member 130 integrally formed with the insert reinforcing member 140 is disposed on the male screw portion of the bolts for fixing the position. That is, the insert panel member 130 is disposed inside the PHC pile mold in such a way that the male screw portions of the position fixing bolts penetrate the through hole portions 132 formed in the insert panel member 130 .

The insert nut member 120 is respectively fastened to the male screw portions of the position fixing bolts passing through the through hole portions 132 of the insert panel member 130 . Accordingly, the insert panel member 130 and the insert reinforcement member 140 are stably fixed to the inner surface of the upper mold of the PHC pile mold by the insert nut member 120 and the position fixing bolt.

In addition, a plurality of PC steel wires 114 are disposed in the lower mold of the PHC pile mold. The plurality of PC steel wires 114 are arranged long in the longitudinal direction of the PHC pile mold, and are disposed at positions spaced apart from each other along the circumference of the PHC pile mold. The plurality of PC steel wires 114 as described above are wound in a spiral shape by using a knitting machine (not shown).

Then, the concrete constituting the PHC pile body 110 is poured into the lower mold, and the lower mold and the upper mold are combined. The PHC pile mold in which the upper mold and the lower mold are combined as described above is centrifugally molded for a predetermined time. Accordingly, the hollow portion 112a is formed in the central portion of the PHC pile body 110 in the longitudinal direction by the centrifugal force applied to the PHC pile mold.

When the curing of the concrete is completed after a certain period of time, the bolt for fixing the position is removed from the upper mold, the upper mold and the lower mold are separated, and then the PHC file 100 is demolded. At this time, the insert nut member 120, the insert panel member 130 and the insert reinforcement member 140 fixed by the bolt for fixing the position are embedded in the concrete constituting the PHC pile body 110, and the PHC pile body ( 110) is built-in.

9 is a cross-sectional view showing a PHC pile 100 for a retaining wall according to another embodiment of the present invention, and FIG. 10 is a view showing another example of the insert reinforcement members 240 and 250 shown in FIG.

In FIGS. 9 and 10 , the same reference numerals as those shown in FIGS. 1 to 8 indicate the same members, and detailed description thereof will be omitted. Hereinafter, different points from the PHC pile 100 for retaining wall shown in FIGS. 1 to 8 will be mainly described.

9 and 10 , the PHC pile 200 for retaining wall according to another embodiment of the present invention is different from the PHC file 100 for retaining wall shown in FIGS. 1 to 8 , the insert reinforcement member The shape and arrangement structure of the 240 and 250 are different, and the installation method of the wale-length bracket 30 is different.

That is, the insert reinforcing member 140 of the present embodiment may be formed to protrude from both ends of the insert panel member 130 , respectively. For example, the insert reinforcing member 140 may include a left insert reinforcing member 240 formed to protrude from the left end of the insert panel member 130 , and a right insert reinforcing member formed to protrude from the right end of the insert panel member 130 . A member 250 may be included.

In the left insert reinforcing member 240 and the right insert reinforcing member 250 as described above, coupling hole portions 242 and 252 through which the connecting portion 113 of the PHC pile body 110 are communicated may be formed, respectively. A reinforcing wire 244 may be disposed to penetrate through the coupling holes 242 and 252 . On the other hand, the reinforcing wire 244 may be separately installed in the coupling hole 242 of the left insert reinforcing member 240 and the coupling hole 252 of the right insert reinforcing member 250, but in this embodiment, the reinforcing wire 244 ) will be described as being installed in the coupling hole portion 242 of the left insert reinforcing member 240 and the coupling hole 252 of the right insert reinforcing member 250 .

In addition, the insert reinforcing members 242 and 252 may be formed in a cross-sectional shape extending from both ends of the insert panel member 130 toward the inside of the PHC pile body 110 . When the insert reinforcing members 242 and 252 are formed in a structure that opens to both sides as described above, the male screw part of the bolt for fixing the position that penetrates the through hole 132 of the insert panel member 130 during the manufacture of the PHC pile 100 The operation of fastening the insert nut member 120 to the insert may not be hindered by the insert reinforcing members 242 and 252 .

In addition, the arrangement angle θ formed between the insert reinforcing members 242 and 252 and the insert panel member 130 may be provided in an angle range of 90 degrees or more to less than 180 degrees. Preferably, the arrangement angle θ is provided in an angle range of 110 degrees or more to 150 degrees or less, and the arrangement angle θ of the left insert reinforcing member 240 and the right insert reinforcing member 250 is the same as each other. can be

On the other hand, the insert reinforcing member 242, 252 of the present embodiment may also have a bent portion 146 and an uneven portion 148 similarly to the insert guarantee member 140 ′ shown in FIG. 8 , but the bent portion 146 . ) and a detailed description of the concavo-convex portion 148 will be omitted.

9 and 10 show insert reinforcing members 242 and 252 according to the present embodiment, respectively.

Looking at the difference between the insert reinforcing members 242 and 252 shown in FIGS. 9 and 10 , the insert reinforcing members 242 and 252 shown in FIG. 9 have a structure elongated in a straight cross-sectional shape, but shown in FIG. Unlike the insert reinforcement members 242 and 252 shown in FIG. 9 , the insert reinforcing members 242 ′ and 252 ′ are elongated in an arc shape having a predetermined curvature.

In particular, the insert reinforcing members 242 ′ and 252 ′ shown in FIG. 10 may be formed in a structure bent in a left and right direction. For this reason, the insert reinforcing members 242' and 252' shown in FIG. 10 are similar to the insert reinforcing members 242 and 252 shown in FIG. 9, the insert nut member 120 during manufacture of the PHC pile 100. It is possible to secure a sufficient working space for fastening to the position fixing bolt, as well as the buried thickness T from the surface of the PHC pile body 110 to the insert reinforcement members 242' and 252' is shown in FIG. It is possible to secure the strength and durability of the PHC pile body 110 by ensuring that the insert is thicker than the case of the illustrated insert reinforcement members (242, 252).

9 and 10, in the PHC pile 200 for retaining wall according to another embodiment of the present invention, the PHC file 100 for retaining wall shown in Figs. In a state in which 30 is in close contact with the front portion of the insert panel member 130, the wale bracket 30 and the insert panel member 130 may be fixed by welding, and with the same shown in FIGS. Unlike the PHC pile 100 for the retaining wall, the wale bracket 30 may be fastened to the insert nut member 120 by the fastening member 150 .

That is, the wale bracket 30 can be in close contact with the front part of the insert panel member 130 disposed in a buried shape on one side of the PHC pile body 110, and in that state, the fastening member 150 is attached to the wale clasp bracket ( After being inserted into the fastening hole of 30 , it may be fastened to the insert nut member 120 disposed inside the insert hole part 116 through the through hole part 132 of the insert panel member 130 . Therefore, in this embodiment, since the wale bracket 30 is welded to the insert panel member 130 and is also fastened to the insert nut member 120 by the fastening member 150, the wale bracket 30 is more robust and It can be installed stably.

Here, the fastening member 150 is inserted through the fastening hole of the wale bracket 30 , the through hole 132 of the insert panel member 130 , and the insert hole 116 of the PHC pile body 110 . It may be screwed to the insert nut member 120 disposed in a structure embedded in the hole 116 .

As described above, the embodiments of the present invention have been described with specific matters such as specific components and limited embodiments and drawings, but these are provided to help a more general understanding of the present invention, and the present invention is limited to the above embodiments Various modifications and variations are possible from these descriptions by those of ordinary skill in the art to which the present invention pertains. Accordingly, the spirit of the present invention should not be limited to the described embodiments, and not only the claims described below, but also all those with equivalent or equivalent modifications to the claims will fall within the scope of the spirit of the present invention.

10: retaining wall
20: belt
30: wale bracket
100, 200: PHC file for retaining wall
110: PHC file body
116: insert hole
120: insert nut member
130, 130': insert panel member
132: through hole
140, 140', 240, 250, 240', 250': insert reinforcement member
142, 242, 254: coupling hole portion
150: fastening member
θ: placement angle

Claims (10)

In the PHC file for retaining wall used for the construction of retaining wall,
PHC file body with a plurality of PC steel wires built-in;
an insert panel member installed in a state of being embedded in the concrete constituting the PHC pile body during manufacturing of the PHC pile, and disposed to expose a front part on one side of the PHC pile body; and
The insert panel member is formed in a structure that protrudes toward the inside of the PHC pile body, and is installed in a state embedded with the insert panel member in the concrete constituting the PHC pile body when the PHC pile is manufactured, and the insert Including; an insert reinforcement member for reinforcing the bonding force between the panel member and the PHC pile body;
The insert reinforcing member is formed integrally with the insert panel member, and is provided at at least one end of both ends of the insert panel member,
The insert panel member is formed in a panel shape elongated along the longitudinal direction of the PHC pile body,
The insert reinforcing member is formed in a bent structure from the insert panel member, and is formed in a panel shape elongated along the longitudinal direction of the PHC pile body, like the insert panel member,
In order to prevent in advance the phenomenon that the insert panel member is arbitrarily detached from the PHC pile body by the high-load bandage coupled to the insert panel member, the coupling force of the insert reinforcing member to the PHC pile body is further improved As a structure for this, a plurality of coupling holes for increasing the coupling force with the PHC pile body are formed in the insert reinforcing member to be spaced apart from each other in a longitudinal direction of the PHC pile body, and a reinforcing wire is provided in the coupling hole part It is disposed in a penetrating direction, and the concrete constituting the PHC pile body is formed in communication with the coupling hole portion when the PHC pile is manufactured,
An insert nut member installed in a state embedded with the insert panel member and the insert reinforcing member together with the insert panel member and the insert reinforcing member in the concrete constituting the PHC pile body during the manufacturing of the PHC pile and disposed in close contact with the rear surface of the insert panel member; and, the insert nut member fixes the positions of the insert panel member and the insert reinforcing member together with a position fixing bolt in a PHC pile mold used for manufacturing the PHC pile in the process of pouring and curing the concrete, and The insert panel member is formed with a through hole through which the position fixing bolt is disposed,
When the PHC pile is manufactured, the insert reinforcing member does not interfere with the installation operation of the insert nut member in the process of passing the through hole portion of the insert panel member and fastening the insert nut member to the insert nut member, the PHC file for retaining wall, characterized in that the insert reinforcement member is formed in a structure bent from the insert panel member only at either one end of both ends of the insert panel member.
delete According to claim 1,
The insert panel member is a PHC pile for retaining wall, characterized in that the single or a plurality are provided to be spaced apart from each other on one side of the PHC pile body.
According to claim 1,
The arrangement angle formed between the insert reinforcing member and the insert panel member is a PHC file for retaining wall, characterized in that it is provided in an angle range of 90 degrees or more to less than 180 degrees.
delete According to claim 1,
At least a portion of the insert reinforcing member, PHC file for retaining wall, characterized in that forming a bent portion bent at a set angle or a set curvature, or at least one concavo-convex portion is provided on the surface.
delete delete According to claim 1,
PHC file for retaining wall, characterized in that at least one of a wale or a wale bracket is fixed by welding to the front portion of the insert panel member.
According to claim 1,
The PHC file for retaining wall, characterized in that the through-hole portion is formed in a slot shape to compensate for a fastening tolerance with the insert nut member.

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