KR101775844B1 - Precast reinforced concrete pile and Retaining Wall Methods Using wall construction work - Google Patents

Abstract

The present invention relates to a circular precast reinforced concrete post which is continuously inserted to the ground to form a retaining wall. The precast reinforced concrete post comprises: a guide groove formed to enable a circular side surface of the other post longitudinally adjacent to one side surface of the one post to be closely inserted thereto; an injection groove formed in the other side of the post or longitudinally with respect to the guide groove and provided to allow grout to be injected between the adjacent posts; a plurality of axially oriented reinforcing steel bars longitudinally arranged inside the post; and a spiral reinforcing steel bar spirally surrounding the axially oriented reinforcing steel bars. According to the present invention, the circular precast post continuously inserted to the ground to form the retaining wall is configured such that in the post, the axially oriented reinforcing steel bars arranged in the lengthwise direction and the spiral reinforcing steel bar spirally surrounding the axially oriented reinforcing steel bars are formed, the guide groove is formed to enable the circular side surface of the other post longitudinally adjacent to the one side surface of the one post to be closely inserted thereto, and the injection groove is formed in the other side of the post or formed in the guide groove to allow the grout to be injected, such that the injection groove can be positioned on a location in which injection is desired to be performed regardless of a coupling direction of the posts, thereby having effects of securing a variety of grouting methods and an excellent waterproof property of the retaining wall.

Description

TECHNICAL FIELD [0001] The present invention relates to a precast reinforced concrete pile and a wall construction method using the same,

The present embodiment relates to a precast reinforced concrete pile and a method of constructing an earth retaining wall using the precast reinforced concrete pile.

In general, foundation work should be carried out in order to construct the structure. In case of excavating the ground for foundation work, it is necessary to construct the earth retaining wall, which is the temporary soil wall, to prevent the earth from collapsing and to prevent the groundwater inflow.

One of the methods of constructing such a tidal-ash wall is the cast in place pile (CIP) method.

In the CIP method, the pit is pierced to a predetermined depth using a punching machine, the reinforcing net is inserted into the perforation hole, and the concrete is poured into the pit to form a cast pit in situ. To form a main heating type wall. At this time, the H-file is inserted instead of the reinforcing net at a predetermined interval to improve the strength.

However, there is a problem that the CIP method is not completely sealed between the main heaters, so that the water repellency is lowered, and therefore, a separate grouting operation is required for the order. That is, the piles alone can not form a complete wall structure, and additional wall construction is essential.

To solve the above problem, Korean Patent Laid-Open No. 10-2010-0052123 (see FIG. 8) is disclosed. In this prior art, in order to perform the function of the present wall by itself only by the main heating type wall, a concave pile manufactured by precast is developed to have a lapping structure, thereby securing water repellency. In addition, since it is used as the wall only with the main heating type wall, it is possible to increase the vertical interval of the braces during the excavation step by increasing the cross section of the main heating type wall or by inserting the steel material such as H- And provides a shortening effect.

However, in the above-mentioned prior art, since the main heating type wall is used as the main wall, it is not easy to install a wrist strap and a strut bracket after completion of the wall construction. In addition, there is a problem in that the rigidity of the pile is insufficient and the cross-section of the pile is enlarged by making the pile only with concrete and reinforcing steel without H steel.

Korean Patent Laid-Open No. 10-2016-0088059 (see FIG. 9) is disclosed. This prior art eliminates the use of expensive H-shaped steel to provide economical efficiency for wall construction, and also provides high structural stability of the earth retaining wall due to the synthesis and constraining effect of the steel pipe and the concrete.

However, since the contact between the piles of the prior art is in line contact, the drawback of poor water repellency can not be compensated. In addition, the surface preparation operation is inevitable for mounting the strut and the slab, and the CFT pile and the CIP pile are alternately installed The construction method of the CFT pile is complicated, and the connection structure between the CFT pile and the earth retaining structure is complicated, resulting in an increase in construction cost and construction time.

Accordingly, it is possible to secure a good water repellency in the construction of the earth retaining wall, to provide a member capable of replacing the expensive H-shaped steel to improve the economical efficiency while ensuring rigidity, and to install the strut and slab quickly after the earth retaining wall is constructed Development of an easy technique is required.

Patent 1: Korean Patent Publication No. 10-2010-0052123 Patent 2: Korean Patent Publication No. 10-2016-0088059

In order to solve the above problems, the present invention provides a circular pre-cast pile which is continuously inserted into a ground to form an earth retaining wall, wherein the inside of the pile includes a plurality of axial reinforcing bars arranged longitudinally, A guide groove is formed so that a circular side face of the pile adjacent to one side of the pile can be closely inserted into the pile and an injection groove capable of pouring grout into the other side of the pile or the guide groove is formed To provide a method of constructing a precast reinforced concrete pile and a method of constructing an earth retaining wall using the same, wherein a bonding force between the piles is increased and excellent water repellency of the retained wall is ensured.

Particularly, since the injection grooves are formed in the guide grooves, the pre-cast reinforced concrete piles in which the injection grooves are present at the position where the grout is to be injected are secured regardless of the direction of pile engagement, And to provide a construction method.

Also, it is intended to provide a precast reinforced concrete pile and a method of constructing the earth retaining wall using the same, wherein the inner side of the pile is formed in a plane so that the surface picking work for installing the strut and the slab after the construction is not separately performed.

Also, it is intended to provide a method of constructing a precast reinforced concrete pile and a method of constructing an earth retaining wall using the same, wherein the outer side of the pile is formed as a flat surface, thereby eliminating unnecessary concrete to reduce costs and improve the structure.

In addition, the cut grooves are formed on both sides of the injection grooves, so that the grout injected is well injected between the adjacent piles, thereby increasing the coupling force between the piles and increasing the water repellency, and the pre-cast reinforced concrete pile Method.

In addition, by inserting a vigorous steel material such as a c-shaped steel, a T-shaped steel and an I-shaped steel in the longitudinal direction inside the pile, it is easy to install a wale, a strut, and a slab after completion of the earth retaining wall, The present invention provides a precast reinforced concrete pile having increased structural strength and a method of constructing a retained wall using the same.

In addition, the present invention provides a precast reinforced concrete pile having a V-shaped coupling member coupled with a vigorous steel member in a pile, and a method of constructing the retained wall member using the pile.

Also, there is provided a precast reinforced concrete pile having a slit groove in the web of the Vogel-use steel material, and a spiral reinforcing bar or the like inserted into the slit groove to firmly bond the Vogel-use steel material and a method of constructing the earthlay wall.

A precast reinforced concrete pile according to an exemplary embodiment of the present invention is a circular precast reinforced concrete pile continuously inserted into a ground to form an earth retaining wall, wherein a circular side surface of a pile adjacent to a longitudinal direction of the pile is closely A guide groove formed to be inserted; An injection groove formed in a longitudinal direction of the other side of the pile or in the guide groove to inject grout between adjacent piles; A plurality of axial reinforcing bars arranged longitudinally in the pile; And a spiral reinforcing bar spirally surrounding the plurality of axial bars.

Further, the inside and / or outside of the pile may be formed as a flat surface.

Further, the grooves may be further formed on both sides of the injection grooves to facilitate injection of the grout.

The pile of claim 1, further comprising a vagial steel material disposed in a longitudinal direction inside the pile, the vagial steel material contacting the inner surface of the pile in a longitudinal direction, And a web installed and embedded in the concrete.

In addition, the web may be provided with a plurality of incision grooves through which the helical reinforcing bars are inserted, and the helical reinforcing bars are inserted into the incision grooves and welded to each other.

In addition, it may further comprise a plurality of coupling holes for coupling the two axial reinforcement bars and the steel material for vogel, among the plurality of axial reinforcing bars, wherein the web is provided with a cutting groove, the coupling hole is formed in a V- Shaped ends of the web are bent, and the two axially reinforcing bars are wrapped and joined together, and the V-shaped vertexes are inserted and welded into the cutout grooves of the web.

In addition, the webs of the Vogue-use steel material are provided at both ends of the flange as a pair, and each of the pair of webs has a plurality of cut-out grooves for inserting the spiral reinforcing bars in the longitudinal direction, And the cutting grooves of the pair of webs are staggered in consideration of the inclination of the spiral reinforcing bars.

Further, the incision groove is formed to be inclined upward or downward, thereby increasing the coupling strength between the spiral reinforcement and the vigorous steel.

Further, an inner flange may be further provided at an inner end of the web.

The pile may further include a receiving cap provided at one end of the pile and an insertion cap provided at the other end of the pile, wherein the receiving cap includes a coupling portion coupled to one end of the pile, And a receiving portion coupled to the blocking portion, wherein the insertion cap includes: a second coupling portion coupled to the other end of the pile; a second blocking portion coupled to the second coupling portion of the pile; And the insertion portion is inserted into the receiving portion, and the blocking portion and the second blocking portion are coupled with the axis reinforcing bar.

In addition, the blocking portion and the second blocking portion may be formed with a through-hole through which the axial reinforcement passes, a screw is formed at the end of the axial reinforcement, and the axial reinforcement is exposed through the penetration hole of the blocking portion and the second blocking portion. And the nut is tightened.

According to another aspect of the present invention, there is provided a method of constructing a precast reinforced concrete pile, comprising the steps of: drilling a ground to form a perforation hole; A second step of inserting the precast reinforced concrete pile into the perforation hole; Forming a perforation hole by drilling the ground along the guide groove of the inserted precast reinforced concrete pile; A fourth step of inserting the precast reinforced concrete pile into the perforation hole formed in step 3; And injecting the grout through the injection grooves of the precast reinforced concrete pile while repeating the steps 3 and 4 or after repeating the steps 3 and 4.

In the present invention, in a circular pre-cast pile continuously inserted into a ground to form an earth retaining wall, the inside of the pile includes a plurality of axial reinforcing bars arranged in the longitudinal direction and helical reinforcing bars spirally wrapping the plurality of axial reinforcing bars A guide groove is formed so that a circular side face of the pile adjacent to one side of the pile can be closely inserted and inserted and an injection groove capable of pouring grout into the other side of the pile or the guide groove is formed, And an excellent water repellency of the earth retaining wall can be secured.

Particularly, since the injection grooves are formed in the guide grooves, the injection grooves exist at the positions where the grout is to be injected irrespective of the direction in which the piles are joined, thereby securing excellent water repellency of the earth retaining wall.

In addition, by forming the inside of the pile in a plane, it is possible to provide the effect that the surface picking work for installation of the strut and the slab after the construction is not separately performed.

In addition, by forming the outside of the pile in a plane, unnecessary concrete is removed, thereby reducing the cost and improving the structure.

In addition, the cut grooves are formed on both sides of the injection grooves so that the grout injected is well injected between adjacent piles, thereby increasing the coupling force between the piles and increasing the water repellency.

In addition, by inserting a vigorous steel material such as a c-shaped steel, a T-shaped steel and an I-shaped steel in the longitudinal direction inside the pile, it is easy to install a wale, a strut, and a slab after completion of the earth retaining wall, It is possible to provide an effect of increasing the structural strength of the substrate.

In addition, by providing a V-shaped coupling member coupled with the Vogel-use steel material in the pile, it is possible to provide an effect that the Vogel-use steel material is firmly coupled.

In addition, a cutout groove is provided in the web of the Vogel-use steel material, and a spiral reinforcing bar or the like is inserted into the cutout groove, thereby providing an effect that the Vogel-use steel is firmly coupled.

1 is a perspective view showing a state in which a main heating type wall is formed using precast reinforced concrete piles according to an example of the present invention.
FIG. 2A is a perspective view showing a state of a pre-cast reinforced concrete pile according to an example of the present invention. FIG.
FIG. 2B is a perspective view showing an internal view of a pre-cast reinforced concrete pile according to an example of the present invention.
FIG. 2C is a perspective view showing only an inner shape of the pre-cast reinforced concrete pile according to an example of the present invention. FIG.
FIG. 2D is a perspective view showing a state in which the inside of the pre-cast reinforced concrete pile is viewed from the opposite side according to an example of the present invention. FIG.
FIG. 2E is a perspective view of a T-shaped Vogue steel material of a precast reinforced concrete pile according to an embodiment of the present invention. FIG.
FIG. 2f is a perspective view of a pile having a U-shaped Vogel-type steel member and a U-shaped Vogel-type steel pile of a precast reinforced concrete pile according to an embodiment of the present invention.
FIG. 2G is a perspective view of a pile installed with an I-shaped vogel-forming steel material of a precast reinforced concrete pile according to an example of the present invention.
3A and 3B are perspective views illustrating a V-shaped coupling member of a pre-cast reinforced concrete pile according to an embodiment of the present invention.
FIG. 4 is a perspective view showing a state in which cutouts are formed on both sides of an injection groove of a precast reinforced concrete pile according to an example of the present invention.
5 is a perspective view showing a state in which an injection groove is formed in a guide groove of a pre-cast reinforced concrete pile according to an example of the present invention.
6 is a perspective view showing a plan view of the inner and outer sides of the pre-cast reinforced concrete pile according to an embodiment of the present invention.
7A to 7C are perspective views showing a state where a receiving cap and an insertion cap are installed on a precast reinforced concrete pile according to an example of the present invention.
Figures 8 and 9 are diagrams of the prior art.

Hereinafter, some embodiments of the present invention will be described in detail with reference to exemplary drawings. In the drawings, like reference numerals are used to refer to like elements throughout the drawings, even if they are shown in different drawings. In the following description of the embodiments of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the difference that the embodiments of the present invention are not conclusive.

Further, in describing the components of the embodiment of the present invention,

Second, A, B, (a), (b), and the like can be used. These terms are intended to distinguish the constituent elements from other constituent elements, and the terms do not limit the nature, order or order of the constituent elements. When a component is described as being "connected", "coupled", or "connected" to another component, the component may be directly connected or connected to the other component, May be "connected "," coupled "or" connected ".

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, a precast reinforced concrete pile and a method of constructing an earth retaining wall using the same according to an embodiment of the present invention will be described in detail with reference to the drawings.

Referring to FIGS. 1 and 2, a precast reinforced concrete pile 1 according to an embodiment of the present invention (hereinafter referred to as "pile" hereinafter) has guide grooves 10 formed in one side thereof in a longitudinal direction, An injection groove 20 for injecting grout may be formed. A plurality of axial reinforcing bars 30 are arranged in the longitudinal direction of the pile 1. Spiral reinforcing bars 31 spirally surrounding a plurality of axial reinforcing bars 30 can be arranged. Hereinafter, one side is referred to as a side where the guide groove 10 is formed in the pile 1, and the other side is referred to as the opposite side. The inner side refers to the side where the ground is excavated in the earth retaining wall in which the pile 1 is continuously installed, and the side to which the earth pressure acting on the opposite side acts.

The guide groove 10 may be formed in a circular shape so as to be closely inserted into the circular side surface of the adjacent pile 1, that is, in a shape that closely matches the side surface of the adjacent pile 1. [ Therefore, the adjacent piles 1 are inserted into the guide grooves 10 and are tightly coupled with each other. Thus, resistance to the displacement of the piles 1 is increased. At the same time, when forming the perforation holes for inserting adjacent piles 1, By doing so, it is possible to perforate the perforation hole accurately and at the same time to act as a guide when the adjacent pile 1 is inserted into the perforation hole, so that the adjacent pile 1 can be inserted correctly and vertically have. In addition, the guide grooves 10 can increase the watertightness of the earth retaining wall by increasing the contact area between the adjacent piles 1. [

The grouting grooves 20 are formed concavely on the other side of the pile 1. Grout can be injected between the pile 1 and the pile 1 through the grooves 20. That is, the grout is injected into the injection groove 20 and then the grout is injected while pressing the injection groove 20 to a certain extent to at least the guide groove 10 of the pile 1 around the injection groove 20 By injecting the grout, the watertightness of the earth retaining wall, that is, the water repellency, can be remarkably increased.

The axial reinforcing bars 30 are arranged in the longitudinal direction within the pile 1 so as to be resistant to the earth pressure acting on the back surface of the pile 1. [ However, in the case of the pile 1 of the present embodiment, since the outer earth pressure acts mainly on the inner side, it is structurally preferable to arrange the pile inner side and the outer side.

The spiral reinforcing bar 31 can spiral and enclose a plurality of axial reinforcing bars 30 to bind and prevent the axial reinforcing bar 30 from buckling or departing so that the flexural strength of the pile 1 can be remarkably increased. The spiral reinforcing bar 31 can be installed by spirally winding a plurality of axial reinforcing bars 30 in a longitudinal direction, that is, in a vertical direction. Instead of the spiral reinforcing bars 31, a plurality of reinforcing bars may be provided, spaced apart at regular intervals in the vertical direction.

A steel material 40 can be provided on the inner side of the pile 1 in the longitudinal direction. The Vogue-use steel material 40 can be provided with a hook for supporting a wale band or the like installed to support the earth retaining wall.

The vogue-use steel material 40 comprises a flange 41 provided in contact with the inner surface of the pile 1 and a web 43 connected to the flange 41 at right angles to be embedded in the inner concrete of the pile 1 T-shaped. That is, the flange 41 is provided so that one side is exposed to the inside, so that a hook for installation of a wristband or the like can be easily installed by welding or the like. The web 43 is installed in a direction perpendicular to the flange 41 and integrally formed with the flange 41 or embedded in the concrete of the pile 1 by welding or the like to the flange 41, 41 are firmly fixed to the pile 1.

In addition, the Vogel-use steel material 40 is installed in the longitudinal direction of the pile 1, thereby increasing the structural strength of the pile 1 against earth pressure and the like. Therefore, in this embodiment, it is not necessary to increase the cross-section of the pile or to install the H-shaped steel in the center of the pile as in the prior art, so that the strength of the pile can be increased at a minimum cost, There is an effect that can be installed.

In addition, the web 43 embedded in the pile 1 may be composed of one or more. That is, a pair of webs 43 may be formed in a U-shape (see FIG. 2F) provided at both side ends of the flange 41, respectively. By joining the pair of webs 43 to both ends of the flange 41 as described above, not only the structural strength of the pile 1 is increased but also the vogue-use steel material 40 is more firmly coupled to the pile 1 And the like can be combined more stably.

In addition, an inner flange 41 may be further provided on the inner end of the web 43 to form the I-shaped steel 40 in an I-shape (see FIG. 2G). This I-shaped vigorous steel material 40 not only increases the structural strength of the pile 1 but also makes the vogue-use steel material 40 firmly attached to the pile 1. [

A plurality of cut-out grooves 45 may be formed in the web 43 of the T-shaped or C-shaped vigorous steel material 40 described above. A steel material 40 for vogue which is rigidly bonded to the pile 1 and is firmly coupled to the pile 1 at the same time as the steel material 40 for vogue is welded after the spiral reinforcing bars 31 are inserted into the cut- The stiffness of the pile 1 can be increased and the stiffness of the pile 1 can be increased. Therefore, sufficient rigidity can be ensured without using the expensive H-shaped steel, and the economical efficiency can be improved. In addition, the wrist strap can be more firmly coupled.

It is preferable that the cutout grooves 45 provided in the web 43 of the V-shaped voicing steel member 40 are staggered in consideration of the inclination of the spiral reinforcing bars 31 so that the spiral reinforcing bars 31 are inserted well .

The cutout groove 45 may be formed in a horizontal direction, or may be inclined upward or downward. Particularly, when the reinforcing bar 31 is formed to be inclined upward or downward, the reinforcing bar 31 has a bonding strength after concrete hardening even if the reinforcing bar 31 is not particularly welded, and is more firmly bonded when it is welded.

3A and 3B, a V-shaped coupling hole 50 is formed to allow the axial reinforcement 30 and the Vogel-use steel 40 to be placed in the precast reinforced concrete pile 1 . This engagement hole 50 is useful when the helical bar 31 and the web 43 are not in contact with each other.

Both ends of the coupling port 50 can be bent and coupled by wrapping the two axial bars 30 and the vertex portion of the coupling port 50 can be welded to the web 43, The steel material 40 can be firmly coupled to the pile 1 by being welded to the pile 1. [ The joint 50 can be coupled to the axle 30 reinforced on the outside of the pile 1. In this case, the joint strength can be further increased.

Referring to FIG. 4, cutouts 21 may be further formed on both sides of the injection groove 20. When the adjacent piles 1 are in close contact with each other, the grout injected can not be injected into the space between the piles 1. When the pile 1 is opened to the inside or outside, And the pile 1 may not be injected to the opposite side of the pile 1, so that the bonding force between the piles 1 is insufficient and the degree may not be good. In this case, the cut-out portion 21 allows the grout to be injected into the adjacent piles 1, and even if the injection is not performed, the grout is injected in the range including the injection grooves 20 and the cut- It is possible to make sure that the water repellency is secured and the bonding force between the piles 1 is not interfered.

Referring to FIG. 5, the injection grooves 20 may be formed on one side of the pile 1, that is, the guide grooves 10. In this case, irrespective of the direction of connection of the pile 1, the injection grooves 20 are present at a position where the grout is to be injected, so that convenience of construction can be provided. That is, in the case of the pile 1 of the present embodiment, the pile 1 is installed continuously in the ground to have a square shape. In this case, in the case of the pile 1 provided at the corner, There is no problem at all.

Referring to FIG. 6, the inside and / or outside of the pile 1 may be formed as a flat surface. In the case of forming the inside of the pile 1 in a plane, it is possible to facilitate the installation of a wrist strap or a strut bracket on the inner side after the pile 1 is built. That is, it is not necessary to perform a surface finishing operation to install a wale band or the like, and it is not necessary to perform a finishing work with mortar or the like between the piles 1. In addition, when the outside of the pile 1 is flat, unnecessary concrete can be removed to save concrete without loss of structural strength.

7A to 7C, when the pile 1 is installed at a deep depth, a plurality of piles 1 can be connected to each other. In this case, the receiving cap 100 is provided at one end of the upper or lower end of the pile 1, and the insertion cap 200 inserted into the receiving cap 100 is provided at the other end, can do. The insertion cap 200 may be inserted into the receiving cap 100 and then welded or bolted together.

The receiving cap includes a coupling portion 111 coupled to one end of the pile 1, that is, a portion of one end of the pile 1, and a blocking portion 113 blocking the end portion of the coupling portion 111, And may include a receiving portion 115 which is coupled to the blocking portion 113 and has the same shape as a rim of the pile 1. [

The insertion cap 200 includes a second coupling portion 211 coupled to the other end of the pile 1, that is, receiving the other end of the pile 1, a second blocking portion 211 blocking the second coupling portion 211, An insertion portion 215 inserted into the receiving portion 115 while being coupled to the second blocking portion 213. [ The insertion portion 215 can be inserted into the receiving portion 115 tightly.

The axial reinforcement 30 may be coupled to the blocking portion 113 and the second blocking portion 213. That is, a through hole 220 through which the axial reinforcement 30 can pass is formed in the blocking part 113 and the second blocking part 213, and a shaft reinforcing bar 30 having a screw 230 is formed at the end thereof The nuts 231 may be fastened to be firmly coupled after protruding through the through holes 220.

One example of the method of constructing the earth retaining wall using the precast reinforced concrete pile 1 according to the present embodiment includes a step 1 of forming a perforation hole by drilling the ground, a step of inserting the precast reinforced concrete pile 1 into the perforation hole A step 3 of forming a perforation hole by piercing the ground so as to abut the guide groove 10 of the inserted precast reinforced concrete pile 1, the pre-cast reinforced concrete pile 1 in the perforation hole formed in the step 3, The grout is injected through the injection grooves 20 of the precast reinforced concrete pile 1 while repeating the steps 3 and 4 or repeating the steps 4 and 5 of inserting the reinforcing concrete 1 into the guide grooves 10 It may include five steps.

While the present invention has been described in connection with what is presently considered to be the most practical and preferred embodiment, it is to be understood that the invention is not limited to the disclosed embodiments. That is, within the scope of the present invention, all the constituent elements may be constituted or operated selectively in combination with one or more. Furthermore, the terms "comprises", "comprising", or "having" described above mean that a component can be implanted unless otherwise specifically stated, But should be construed as including other elements. All terms, including technical and scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs, unless otherwise defined. Commonly used terms, such as predefined terms, should be interpreted to be consistent with the contextual meanings of the related art, and are not to be construed as ideal or overly formal, unless expressly defined to the contrary.

The foregoing description is merely illustrative of the technical idea of the present invention, and various changes and modifications may be made by those skilled in the art without departing from the essential characteristics of the present invention. Therefore, the embodiments disclosed in the present invention are intended to illustrate rather than limit the scope of the present invention, and the scope of the technical idea of the present invention is not limited by these embodiments. The scope of protection of the present invention should be construed according to the following claims, and all technical ideas within the scope of equivalents should be construed as falling within the scope of the present invention.

1: Precast reinforced concrete piles
10: Guide groove
20: injection groove
21:
30: Axial reinforcement
31: Helical bar
40: Steel for Vogue
41: Flange
43:
45: incision groove
50:
100: Capacity cap
111:
113:
115:
200: insertion cap
211: second coupling portion
213: second blocking portion
215:
220: Through hole
230: Screw
231: Nuts

Claims (12)

In a circular precast reinforced concrete pile continuously inserted into the ground to form an earth retaining wall,
A guide groove formed on one side of the pile so that a circular side surface of the pile adjacent in the longitudinal direction can be closely inserted;
An injection groove formed in a longitudinal direction of the other side of the pile or in the guide groove to inject grout between adjacent piles;
A plurality of axial reinforcing bars arranged longitudinally in the pile; And
And a spiral reinforcing bar spirally surrounding the plurality of axial bars,
And a vigorous steel material provided in the longitudinal direction on the inner side of the pile,
Wherein the Vogel-use steel material comprises a flange provided in the longitudinal direction in contact with the inner side surface of the pile, and a web which is coupled to the flange and installed in the longitudinal direction of the pile and embedded in the concrete, And is formed in the longitudinal direction,
The spiral reinforcing bar is inserted into the incision groove and welded,
The incision grooves are formed to be inclined upward or downward to increase the bonding strength of the vigorous steel,
And an insertion cap provided at one end of the upper and lower ends of the pile or an insertion cap provided at the other end,
Wherein the receiving cap includes a coupling portion coupled to one end of the pile, a blocking portion coupled to an end of the coupling portion, and a receiving portion coupled to the blocking portion,
Wherein the insertion cap includes a second coupling portion coupled to the other end of the pile, a second blocking portion coupled to the second coupling portion of the pile, and an insertion portion coupled to the second blocking portion,
Wherein the insertion portion is closely inserted into the receiving portion, and the blocking portion and the second blocking portion are coupled to the axial reinforcing bar.
The method according to claim 1,
Wherein the inner and / or outer sides of the pile are flat.
The method according to claim 1,
And a cutout portion is formed on both sides of the injection groove to facilitate injection of the grout.
delete delete delete delete delete delete delete The method according to claim 1,
Wherein the blocking portion and the second blocking portion are formed with a through hole through which the axial reinforcement passes, a screw is formed at an end of the axial reinforcement, and a nut is inserted into the axial reinforcement exposed through the through- Wherein the pre-cast reinforced concrete piles are fastened.
A method of constructing an earth retaining wall using precast reinforced concrete piles according to any one of claims 1, 2, 3 and 11,
A first step of drilling the ground to form a perforation hole;
A second step of inserting the precast reinforced concrete pile into the perforation hole;
Forming a perforation hole by drilling the ground along the guide groove of the inserted precast reinforced concrete pile;
A fourth step of inserting the precast reinforced concrete pile into the perforation hole formed in step 3;
And 5) injecting the grout through the injection grooves of the precast reinforced concrete pile while repeating the steps 3 and 4 or after repeating the steps 3 and 4. The pre-cast reinforced concrete pile can be used as the pre-cast reinforced concrete pile.

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