KR20180007292A - Connecting device for PHC pile - Google Patents

Abstract

The present invention relates to a PHC pile connection device, enabling cement milk filled between a drilling hole and a PHC pile to be introduced to be filled into an entire inner space of a pile connection device in order to maximize compression and bending stress of the pile connection device to improve performance of a product and enabling a bending reinforcement member to be mounted in an edge of a bottom surface of an upper plate between reinforcement members radially formed in a connection pipe to improve bending strength of the upper plate to restrain deformation of the upper plate near a bolt hole caused by a tensile force transmitted to a bolt to improved constructability and a construction quality to improve economic efficiency.

Description

PHC pile connection device {Connecting device for PHC pile}

The present invention relates to a pile connecting apparatus for connecting two or more PHC piles having the same diameter, and more particularly, to a pile connecting apparatus for connecting two pile connecting apparatuses, When the PHC pile is connected with the joint pile, the cement milk filled between the perforated hole and the PHC pile flows into all the internal spaces of the pile connecting device, thereby maximizing the compression and bending strength of the pile connecting device A reinforcing member is mounted on the edge of the upper plate between the reinforcing members formed radially in the connecting pipe to increase the rigidity against the bending deformation of the upper plate to suppress the deformation of the upper plate due to the tensile force transmitted to the bolt PHC pile connection device.

Recently, as the urban area has expanded rapidly, many structures such as roads and bridges as well as various structures including various structures have been constructed on soft ground. Since the depth from the ground to the ground is generally very deep, the length of the PHC pile is increased to transmit the load of the structure to the support layer.

However, since the maximum length of the PHC pile currently produced is only 15 m, it is inevitable to connect a plurality of PHC piles of the same diameter to each other when the depth of the support layer is 15 m or more. And the tip of the pile and the metal plate joined to the tip of the upper PHC pile were welded together.

However, in case of PHC pile connection by welding, the workability is greatly influenced by the climatic conditions. In case of wind blowing or rain, the welded joint is difficult and the quality is not good. The expensive construction equipment for constructing the pile is required to stop and wait for the work, resulting in a decrease in the efficiency of the construction equipment and an increase in the construction cost due to an increase in the construction period.

In order to connect the PHC pile with the welding method, a metal veneer must be installed on the head or tip of the PHC pile since the pile is produced. Therefore, in order to smoothly supply the PHC pile to the site, Since the PHC pile should be manufactured and secured in inventory, there is a problem that a lot of cost is put into inventory management of the PHC pile.

In order to solve the above problems, Korean Patent Registration No. 10-1460562 discloses a connecting device for fixing a main body in which a corrugated steel plate is formed between a first and a second original plate in a cylindrical shape and is connected to the first and second original plates The PHC pile head and bolt are fastened with bolts or the PHC piles are fastened to the PHC piles through the first and second discs. Due to space limitations, electric wrenches can not be used and only manual wrenches can be used When the pile is installed with the PHC pile connected by the connecting device, the cement milk is not charged in the inner space formed by the corrugated steel plate, so that after the completion of the construction, There is a problem that it is difficult to maximize the increase of the bending strength.

Also, Korean Patent No. 10-1535863 discloses that a top plate portion in which a plurality of first fastening holes are formed and a bottom plate portion in which a plurality of second fastening holes are formed are connected to each other by a connecting portion, and the bottom plate portion and the connecting portion are passed through the first fastening hole A first bolt insertion hole and a second bolt insertion hole opened in an outer diameter direction of the connection portion and communicating with the second fastening hole, wherein the first fastening hole of the upper plate through the first bolt insertion hole is a PHC Since the bolt is fastened to the connection end of the pile, the workability is partially improved as compared with Korean Patent No. 10-1460562. However, since the bolt fastened through the first bolt insertion hole can not be observed from the outside after connecting the PHC pile, There is a difficulty in quality inspection for confirming whether or not the fasteners are fastened and fastened, and when the pile is installed with the PHC pile connected by the connecting device, the cement milk is not charged in the first bolt insertion hole There is a problem that it is difficult to maximize the compression and bending strength increase of the connecting device after completion of the construction.

Japanese Laid-Open Utility Model Application No. 51-000707 discloses a method of connecting a first and a second plate having a plurality of fastening holes by a reinforcing member arranged radially to a connecting pipe, The PHC pile is connected to the first and second plates by bolts. The PHC pile is connected to the first and second plates by a bolt, The cement milk is not charged into the reinforcing ring at the time of construction, so that it is difficult to expect compression and bending strength increase of the connecting device after completion of the construction.

Korean Patent No. 10-1056655 discloses a method of connecting a lower disk and an upper disk with a plurality of reinforcing plates and fixing an annular ring surrounding the reinforcing plate to the reinforcing plate with bolts, similar to the Japanese Utility Model Application No. 51-000707 When the pile is installed with the joint pile connected with the PHC pile by the connecting device, the pile is not charged into the annular ring, so that the compression of the connecting device is completed after the completion of the construction. It is difficult to expect an increase in bending strength.

Korean Patent No. 10-1460562 Korean Patent No. 10-1535863 Japanese Utility Model Utility Bulletin No. 51-000707 Korean Patent No. 10-1056655

SUMMARY OF THE INVENTION It is an object of the present invention to provide a pile connecting device in which a reinforcing member is radially formed on an outer circumferential surface of a connecting pipe so that a connecting pipe connecting a top plate and a bottom plate can be seen, When connecting the PHC pile, the lower plate and the lower PHC pile can be easily bolted to each other using a power tool through a tool insertion hole penetrating the upper plate. When the PHC pile is connected to the pile connecting device, The present invention provides a PHC pile connecting device which can visually confirm whether or not the bolts are fastened and fastened.

It is another object of the present invention to provide a pile-connecting device in which when two or more PHC piles having the same diameter are connected by a pile connecting device, the cement milk charged between the perforation hole and the PHC pile The present invention provides a PHC pile connecting device capable of maximizing compression and bending strength of a pile connecting device by flowing into and filling the internal space.

It is still another object of the present invention to provide a method of manufacturing a steel pipe which is characterized in that a flexural stiffening member is mounted on a bottom edge of a top plate between reinforcing members radially formed on a connecting pipe, It is possible to prevent the deformation of the upper plate material around the bolt hole and to easily adjust the bolt hole position of the lower plate material after the PHC pile end is mounted, To provide a PHC pile connection device that can be installed.

It is a further object of the present invention to provide a method of assembling a coupling guide member to a tool insertion hole in a state where a lower plate member and a lower PHC pile are bolted to each other through a tool insertion hole penetrating through an upper plate member, The upper plate and the upper PHC pile are fastened with bolts to increase the contact area between the PHC pile and the pile connection device as well as to prevent the formation of separate bolt holes in the upper plate, The present invention provides a PHC pile connection device capable of mitigating the concentrated stress.

According to the present invention,

An upper and a lower plate through which a plurality of bolt holes pass through in the same line as the PC nut formed at the end of the PHC pile with the central part passing therethrough;

One of the upper and lower plate members is rotated in a predetermined angle so that the bolt hole of the lower plate member is inserted into the bolt hole of the upper plate member in the same line as the bolt hole of the lower plate member, Tool inserts;

A connection pipe connecting the upper and lower plate members and closing the penetrating central portion of the upper and lower plate members;

And the upper and lower plates are fixed radially to the outer circumferential surface of the connection pipe so as to be connected to the upper and lower plates, thereby increasing the bending stiffness of the upper and lower plates. When the piles are installed, the cement milk flows into all the inner spaces between the upper and lower plates, A reinforcing member forming an 'a' shape so as to increase the rigidity against compression and flexural load when the cement milk is filled and cured;

The length L of the outer circumferential surface of the manual tool working space between the reinforcing members is made longer than the length (l) of the outer circumferential surface of the reinforcing member bent in the " a " shape so as to bolt the PHC pile And a second step of securing the second step.

According to the present invention, when a PHC pile is connected to a pile connecting device having a reinforcing member radially formed on the outer circumferential surface of a connecting pipe so that a connecting pipe connecting the upper plate and the lower plate is visible, By using a wrench, the lower plate and lower PHC pile can be easily bolted, and even if the pile connecting device and the PHC pile are connected, the pile connecting device and the PHC pile fixing bolt can be confirmed visually. And the joint pile can be constructed while securing the construction quality.

According to the present invention, when an embedded pile is constructed with joint piles connected by two or more PHC piles having the same diameter by the pile connection device, the cement milk charged between the perforated hole and the PHC pile is inserted into all the internal spaces So that it is possible to maximize the compression and flexural strength of the pile connecting device, so that it is possible to improve the performance of the product.

According to the present invention, since a bending stiffening member is mounted on the bottom edge of the upper plate between reinforcing members radially formed in the connecting pipe, the rigidity against the bending deformation of the upper plate is increased and the bolt It is possible to prevent the deformation of the upper plate around the hole and to easily adjust the position of the bolt hole of the PHC pile after it is mounted on the end of the PHC pile by forming a guide member radially on the outer circumferential surface of the lower plate, It is possible to improve the economical efficiency due to the shortening of the working time by the improvement of the workability and the working efficiency.

According to the present invention, the fastening guide member is coupled to the tool insertion hole with the bolts fastened to the lower plate member and the lower PHC pile through the tool insertion hole penetrating through the upper plate member, And the upper PHC pile is fastened with a bolt to fix the contact area between the PHC pile and the pile connection device and to form a bolt hole in the upper plate. Therefore, when the vertical load is applied, So that the structural stability can be improved.

1 is a perspective view of a pile connecting device according to an embodiment of the present invention;
Fig. 2 is an exploded perspective view of Fig.
Fig. 3 is a plan view of Fig. 1
4 is a sectional view taken on line A-A '
5 to 9 are views showing a construction process of the pile connecting device according to the embodiment of the present invention
10 to 11 are numerical analysis diagrams of a pile connecting apparatus according to an embodiment of the present invention
12 is a perspective view of a pile connecting device according to another embodiment of the present invention.
13 is an exploded perspective view of Fig. 12,
Fig. 14 is a plan view of Fig. 12
15 is a cross-sectional view taken along the line A-A 'in Fig. 14
16 to 21 are diagrams showing a construction process of the pile connecting device of another embodiment of the present invention

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings. FIG. 1 is a perspective view of a pile connecting apparatus according to one embodiment of the present invention, FIG. 2 is an exploded perspective view of FIG. 1, and FIG. 3 is a plan view of FIG.

The PHC pile connecting apparatus 100 according to the present invention includes an upper and a lower plate member 110 having a plurality of bolt holes 111 and 121 passed through in the same line as the PC nut 11 formed at the end of the PHC pile 10, One of the upper and lower plate members 110 and 120 is rotated at a predetermined angle and the upper plate member 110 and the lower plate member 120 are aligned in a line with the bolt hole 121 of the lower plate member 120, A tool insertion hole 130 is formed in the bolt hole 121 of the lower plate 120 between the bolt holes 111 of the lower plate 120 so that a power tool for fastening the bolt B can be inserted. A connection pipe 140 for closing the penetrating central portion of the upper and lower plate members 110 and 120 while connecting the lower plate members 110 and 120 is connected to the upper and lower plate members 110 and 120, The upper and lower plates 110 and 120 are fixed radially to the outer circumferential surface of the coupling pipe 140 so as to increase the flexural rigidity of the upper and lower plates 110 and 120, Between Shaped reinforcement member 150 is formed so that the rigidity against compression and flexural load is increased when the cement milk is filled and filled in the entire inner space and the cement milk is cured, The length L of the outer circumferential surface of the manual tool working space between the reinforcing members 150 is set to be longer than the length l of the outer circumferential surface of the reinforcing member 150 that is bent to face the upper plate 110 and the PHC pile, The work space of the manual tool is ensured. This will be described in more detail as follows.

And a guide member 160 radially fixed to the outer circumferential surface of the lower plate member 120 so as to be easily seated on an end of the PHC pile.

A flexural reinforcement member 170 that is mounted on the bottom surface of the upper plate 110 between the reinforcing members 150 and suppresses deformation of the upper plate 110 around the bolt holes 111 by a tensile force transmitted to the bolts B, .

The construction and construction of the embodiment of the present invention will be described below.

As shown in FIG. 4, the upper and lower plate members 111 and 121, which have the same diameter and penetrate the center portion, and in which a plurality of bolt holes 111 and 121 are passed in the same line as the PC nut 11 of the PHC pile 10 A power tool for fastening a bolt B to the bolt hole 121 of the lower plate 120 may be inserted between the bolt holes 111 of the upper plate 110, Thereby forming the tool insertion hole 130.

The upper and lower plates 110 and 120 are connected by a connecting pipe 140. The diameter of the connecting pipe 140 is larger than the diameter of the upper and lower plates 110 and 120 So that welding of the upper and lower plates 110 and 120 and the coupling pipe 140 is facilitated by the step.

A reinforcing member 150 is formed on the outer circumferential surface of the connection pipe 140 so as to face the inner circumferential surface of the connection pipe 140. The outer circumferential surface of the connection pipe 140 is seen through the reinforcing member 150, The PHC pile 10 and the PHC pile 10 can be installed while confirming whether the bolts B fixedly connected to the pile connecting device 100 and the PHC piles 10 'are visually observed. As a result, the construction quality can be improved.

The reinforcing member 150 is installed in such a manner that a tool insertion hole 130 passing through the upper plate 110 is positioned inside the reinforcing member 150 and then a guide member 160 are radially fixed, the manufacture of the pile connecting apparatus 100 of the present invention is completed.

5 to 6, the guide member 160 of the pile connecting apparatus 100 is connected to the PHC pile 10 through the PHC pile 10, The pile connecting device 100 is rotated so that the bolt holes 121 of the lower plate 120 and the PC nuts 11 of the PHC pile 10 are aligned on the same line. 100) is mounted on the end of the PHC pile 10.

The bolts B are placed on the PC nuts 11 of the PHC pile 10 through the bolt holes 121 of the lower plate 120 and then the upper plate 110 of the pile connecting device 100 is rotated, The process of inserting the power tool into the tool insert hole 130 penetrating the PC nut 11 of the PHC pile 10 and fastening and fixing the bolt B to the PC nut 11 of the PHC pile 10 by the rotational force of the power tool is performed on the PC nuts 11 The lower plate 120 is fixed to the end of the PHC pile 10 by the bolts B while repeating until the bolts B are fastened.

7, when the lower plate 120 of the pile connecting device 100 is mounted on the end of the PHC pile 10 by the above process, the upper plate 110 of the pile connecting device 100 is connected to the PHC The bolt holes 111 penetrating the upper plate 110 of the pile connecting device 100 and the PC nuts 11 of the PHC pile 10 ' The bolts B are placed on the PC nut 11 of the PHC pile 10 'through the bolt holes 111 of the upper plate 110 by the rotational force of the manual tool, The process of fastening the PHC pile 10 to the PC nut 11 is repeated until the bolts B are fastened to the PC nuts 11 so that the PHC piles 10 'Is fixed, at least two PHC piles are connected to form a joint pile 1 as shown in FIG.

By forming the length L of the outer circumferential surface of the manual tool work space S between the reinforcing members 150 to be longer than the length l of the outer circumferential surface of the reinforcing member 150 bent in the shape of ' It is possible to secure a working space of the manual tool rotating to fasten the bolt B to the PC nut 11 of the PHC pile 10 'through the bolt hole 111 of the PHC pile 10'.

When the joint pile 1 in which two or more PHC piles 10 and 10 'are connected by the pile connecting device 100 is inserted into the perforation hole 20 filled with cement milk, The cement milk filled between the PHC piles 10 and 10 'and the perforation hole 20 passes through the upper and lower plates 110 including the space between the piles 100 and the reinforcing members 150, The pile connecting device 100 can be maximized in compression and bending strength after cement milk curing by being inflowed and filled into all the internal spaces formed by the connecting pipe 120 and the connecting pipe 130. [

As a result of the three-dimensional numerical analysis of the pile connecting apparatus 100, when a compressive load of 2539 kN, which is an allowable proof load of a 500 mm-diameter ultra-high strength PHC pile, is applied to the pile connecting apparatus 100, When the cement milk is not filled in the member 150, a compressive stress of 175.24 MPa is generated at the edge of the 'a' -shaped reinforcing member 150 as shown in FIG. 10, When the cement milk is filled in the inside, as shown in FIG. 11, a compressive stress of 149.78 MPa is generated at the edge of the 'a' shaped reinforcement member 150 so that the cement milk is filled in the 'a' shaped reinforcement member 150 It can be seen that the maximum compressive stress occurring in the pile connecting device 100 is reduced by 14.5%.

Therefore, when the pile connecting device 100 is manufactured from the SS 400 steel having the allowable strength of 140 MPa, when the cement milk is not filled in the 'A' shaped reinforcement member 150, When the compression load is applied, compressive stress of 140 MPa is generated in the 'a' -shaped reinforcing member 150, whereas when the cement milk is filled in the 'a' -shaped reinforcement member 150, Since the compressive stress of 140 MPa is generated in the 'A' shaped reinforcement member 150 when the compressive force of 2373 kN is applied, the cement milk is filled in the 'A' shaped reinforcement member 150 so that the pile connecting device 100 can support When the compressive force acts on the embedded pile constructed by the joint pile 1 connecting the PHC piles 10 and 10 'to the pile connecting device 100, the compression load applied to the pile connection 10 is increased by about 17% A large compressive force is applied to the apparatus 100. At this time, The compressive force is stably supported by the reinforcing member 150 and the cement milk filled therein and at the same time the flexural rigidity of the end edges of the upper and lower plates 110 and 120 is reinforced to suppress deformation of the pile connecting device 100 The connection state of the PHC piles 10 and 10 'can be stably maintained.

When tensile force acts on the embedded pile installed with the joint pile 1, a tensile force is transmitted to the pile connecting device 100 through the bolts B fastened to the PC nut 11 of the PHC pile 10 ' Since the deformation of the bolt hole 121 of the lower plate member 120 is suppressed by the reinforcing member 150 installed in the vicinity of the bolt hole 121 by the tensile force transmitted to the bolt B, The deformation of the base plate 120 does not occur.

However, the bolt hole 111 passing through the upper plate 110 passes through the inside of the manual tool work space, and the reinforcement member 150 is installed at a distance from the bolt hole 111, and the tensile force transmitted to the bolt B Since the deformation of the upper plate 110 around the bolt hole 111 occurs very much, the arc of the upper plate 110 between the reinforcing members 150 radially formed on the outer circumferential surface of the connection pipe 140 Since the upper plate member 110 around the bolt hole 111 can increase the rigidity against the bending deformation of the bolt hole 111 due to the tensile force acting on the buried pile, It is possible to suppress deformation.

12 to 14, the PHC pile connecting apparatus 100 'of another embodiment of the present invention includes a lower plate member 120' and a lower plate member 120 ' The PHC pile 10 is inserted into the bolt hole 121 of the bolt hole 121 of the bolt hole 121 and the bolt hole 121 of the bolt hole 121, A lower plate member 120 through which a plurality of bolt holes 121 are passed is formed in the same line as the PC nut 11 formed at the end of the upper and lower plate members 110 and 120, A connecting pipe 140 for closing a penetrating central portion of the upper and lower plates 110 and 120 is formed and radially fixed to the outer circumferential surface of the connecting pipe 140 to increase the bending stiffness of the upper and lower plates, The cement milk is filled and filled in all the internal spaces between the lower plate members 110 and 120 and the connection pipe 140 to cure the cement milk The reinforcing member 150, which is one of an I-shaped, a T-shaped or a-shaped member facing each other between the bolt holes 121 so as to increase the rigidity against compression and flexural load, And a coupling guide member 180 which is coupled to the tool insertion hole 130 and mounted on the bottom surface of the upper plate 110 to guide the upper plate 110 and the PHC pile 10 ' And will be described in more detail as follows.

And a guide member 160 radially fixed to the outer circumferential surface of the lower plate member 120 so as to be easily seated on an end of the PHC pile.

The upper and lower plate members 110 and 110 around the bolt holes 111 and 121 are fixed to the bottom surface of the upper plate member 110 between the reinforcing members 150 and the upper surface of the lower plate member 120 by a tensile force transmitted to the bolts B, And a bending stiffening member 170 'for suppressing deformation of the stiffener 120.

The fastening guide member 180 includes a body 181 having a larger diameter than the tool insertion hole 130 and a bolt hole 182 penetrating the body 181 to receive the bolt B, And includes a step 183 formed on the outer circumferential surface of the body 181 so as to be engaged with the tool insertion hole 130.

Hereinafter, the construction and construction of another embodiment of the present invention will be described.

15, a lower plate member 120 through which a plurality of bolt holes 121 pass through is formed in the same line as the PC nut 11 of the PHC pile 10 while passing through the center at the same diameter An upper plate member 110 through which the tool insertion hole 130 is inserted is formed so that the power tool can be inserted in the same line as the bolt hole 121 of the lower plate member 120.

The upper and lower plates 110 and 120 are connected by a connecting pipe 140. The diameter of the connecting pipe 140 is larger than the diameter of the upper and lower plates 110 and 120 So that welding of the upper and lower plates 110 and 120 and the coupling pipe 140 is facilitated by the step.

The reinforcing member (150) is installed radially on the outer circumferential surface of the connection pipe (140), wherein the reinforcing member (150) is formed such that an 'I' shape, a 'T' shape or a ' 150 and the outer circumferential surface of the connecting pipe 140 are seen to visually confirm the tightness and tightness of the bolts B fixing the pile connecting device 100 'and the PHC piles 10, 10' The construction quality can be improved.

The reinforcing member 150 is installed between the bolt holes 121 penetrating the lower plate member 120 while radially fixing the guide member 160 on the outer circumferential surface of the lower plate member 120, The fabrication of the device 100 'is completed.

16 to 17, the pile connecting device 100 'manufactured in the above process is mounted on the end portion of the PHC pile 10 by the guide member 160 of the pile connecting device 100' The pile connecting device 100 'is rotated so that the bolt holes 121 of the lower plate 120 and the PC nuts 11 of the PHC pile 10 are positioned on the same line, The bolts B are placed in the PC nuts 11 of the PHC pile 10 through the holes 121 and inserted into the tool insertion holes 130 penetrating the upper plate 110 of the pile connecting device 100 ' The process of inserting the power tool and fastening and fixing the bolt B to the PC nut 11 of the PHC pile 10 by the rotational force of the power tool is repeated until the bolts B are fastened to the PC nuts 11 So that the bottom plate 120 is fixed to the end of the PHC pile 10 by the bolts B. [

18, when the lower plate 120 of the pile coupling device 100 'is mounted on the end of the PHC pile 10, the upper plate 110 of the pile coupling device 100' The body 181 of the fastening guide member 180 is coupled to the upper plate member 110 through the space between the upper and lower plate members 110 and 120, The PHC pile 10 is attached to the upper plate 110 as shown in FIG. 19 after the step 183 is engaged with the tool insertion hole 130 while being coupled to the tool insertion hole 130 in the outward direction The PC nut 11 of the PHC pile 10 'is positioned so as to be in line with the bolt hole 182 of the fastening guide member 180.

In this state, the bolt B is positioned on the PC nut 11 of the PHC pile 10 'through the bolt hole 182 of the coupling guide member 180, and the bolt B is rotated by the rotational force of the manual tool The process of fastening the PHC pile 10 'to the PC nut 11 is repeated until the bolts B are fastened to the PC nuts 11 and the PHC pile (10 ') is fixed and a joint pile (1') to which at least two PHC piles are connected is formed as shown in FIG.

Although the fastening guide member 180 is described as being coupled to the tool insertion hole 130 before the PHC pile 10 'is brought into close contact with the upper plate 110, the PHC pile 10' The fastening guide member 180 may be coupled to the tool insertion hole 130 passing through the upper plate 110 in a state in which the fastening guide member 180 is in close contact with the upper plate 110.

When a compressive force is applied to the pile installed with the joint pile 1, a large compressive force acts on the pile coupling device 100 '. At this time, an' I 'shape, a' T 'shape or a' The compressive force is stably supported by any one of the reinforcing members 150 formed on the PHC piles 10 and 10 'so that the connection state of the PHC piles 10 and 10' can be stably maintained.

The bolt holes 111 and 121 penetrated through the upper and lower plate members 110 and 120 pass through the interior of the manual tool work space and are inserted into the reinforcing member 150 at a distance from the bolt holes 111 and 121, Since the deformation of the upper and lower plate members 110 and 120 around the bolt holes 111 and 121 is very large due to the tensile force transmitted to the bolt B, A bending reinforcement member 170 'in the form of an arc is mounted and fixed on the bottom surface of the upper plate 110 between the reinforcing members 150 and the upper surface of the lower plate 120 to form upper and lower plates 110) 120 can increase the stiffness against bending deformation, so that deformation of the upper and lower plates 110, 120 around the bolt holes 111, 121 due to the tensile force acting on the embedded pile can be suppressed .

When the joint pile 1 'to which the PHC pile 10 or 10' is connected by the pile connecting device 100 'is inserted into the perforation hole 20 filled with cement milk, as shown in FIG. 21, The cement milk filled between the PHC pile 10 and the perforation hole 20 may include the space between the pile connecting device 100 and the reinforcing member 150 Filled and cured into all the internal spaces formed by the upper and lower plate members 110 and 120 and the connecting pipe 130, thereby maximizing the compression and bending strength of the pile connecting apparatus 100 'after cement milk curing.

When the body 181 of the coupling guide member 180 is coupled to the tool insertion hole 130 to increase the contact area between the pile coupling device 100 'and the PHC pile 10', the PHC pile The concentrated stress generated at the end portion of the joint pile 10 'is relaxed and the structural stability of the joint pile 1' connected to the pile connecting device 100 'can be increased.

Although the present invention has been described in connection with certain exemplary embodiments and drawings, it is to be understood that the phraseology and terminology used herein are for the purpose of description and should not be interpreted to limit the scope of the present invention. It must be interpreted in terms of meaning and concept. Therefore, the embodiments described in the present specification and the configurations shown in the drawings are only examples of the present invention, and not all of the technical ideas of the present invention are described. Therefore, It is to be understood that equivalents and modifications are possible.

100: pile connecting device 110: upper plate
120: lower plate member 130: tool insertion hole
140: connector 150: reinforcing member
160: guide member 170: bending reinforcement member

Claims (6)

An upper and a lower plate through which a plurality of bolt holes pass through in the same line as the PC nut formed at the end of the PHC pile with the central portion passing therethrough;
One of the upper and lower plate members is rotated in a predetermined angle so that the bolt hole of the lower plate member is inserted into the bolt hole of the upper plate member in the same line as the bolt hole of the lower plate member, Tool inserts;
A connection pipe connecting the upper and lower plate members and closing the penetrating central portion of the upper and lower plate members;
The bending strength of the upper and lower plates is increased by being radially fixed to the outer circumferential surface of the connecting pipe so as to be connected to the upper and lower plates. When the pile is installed, cement milk flows into all the inner spaces between the upper and lower plates and the connecting pipe. And a reinforcing member formed to face the " a " shape so that the rigidity against compression and flexural load increases when the cement milk is filled and cured,
The length L of the outer circumferential surface of the manual tool working space S between the reinforcing members is made longer than the length l of the outer circumferential surface of the reinforcing member which is bent in the " a " shape so as to secure the working space of the manual tool PHC peg connection device. An upper plate member through which a tool insertion hole is inserted so that a power tool for bolt fastening can be inserted into the bolt hole of the lower plate member in the same line as the bolt hole of the lower plate member while passing through the center portion;
A lower plate having a plurality of bolt holes penetrating the same in a line with the PC nut formed on the PHC pile with the central part penetrating therethrough;
A connection pipe connecting the upper and lower plate members and closing the penetrating central portion of the upper and lower plate members;
The upper and lower plate members are radially fixed to the outer circumferential surface of the connecting pipe so as to be connected to the upper and lower plate members to increase the bending stiffness of the upper and lower plates and to inject and fill the cement milk into all the inner spaces between the upper and lower plates and the connecting pipe A reinforcing member which is one of an 'I' -shape, a 'T -shape or a' -shaped member so as to face each other such that rigidity against compression and flexural load increases when the cement milk is cured;
And a coupling guide member which is coupled to the tool insertion hole and mounted on a bottom surface of the upper plate to guide the upper plate and the PHC pile to be fixed by bolts. The connector according to claim 2,
A body having a larger diameter than the tool insertion hole;
A bolt hole penetrating the body so that the bolt is engaged;
And a stepped portion formed on the outer circumferential surface of the body to be engaged with the tool insertion hole. The method according to claim 1 or 2,
Further comprising a guide member radially fixed to the outer circumferential surface of the bottom plate to easily mount the PHC pile on an end of the PHC pile. The method according to claim 1,
Further comprising a flexural reinforcement member mounted and fixed to a bottom surface of the upper plate between the reinforcing members to suppress deformation of the upper plate material around the bolt hole. The method of claim 2,
Further comprising a bending stiffening member which is mounted on the bottom surface of the upper plate and between the reinforcing members and fixed to the upper surface of the lower plate to suppress deformation of upper and lower plate members around the bolt hole by tensile force transmitted to the bolt. Connection device.

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