KR102529767B1 - Connecting device for PHC pile - Google Patents

Abstract

In the present invention, in the PHC pile connector in which the upper and lower rings and the upper and lower projection plates are integrally formed or the upper and lower plates and the upper and lower projection plates are integrally formed, the inner end of one support surface of the upper and lower projection plates Upper and lower guide vanes with inclined surfaces are formed, and when the upper projection plate is inserted into and coupled to the space formed between the lower projection plates, the inclined surface of the upper guide vane of the upper projection plate adheres to the inclined surface of the lower guide vane of the lower projection plate and slides. As they are coupled to each other, a keyhole is formed between one side support surfaces spaced apart at a predetermined interval, and is composed of a shear fixing key that is fastened to the keyhole to couple the upper and lower projection plates, thereby forming a side surface of the upper and lower projection plates of the pile connector. The removal of the formed semicircular fastening groove makes it easy to manufacture a molding sand mold using a mold, thereby reducing product manufacturing costs, and the simple product structure reduces the occurrence of burrs, which are foreign substances attached to the product during the product manufacturing process, thereby removing burrs. Post-processing work can be minimized, and workability is improved by easily moving the upper and lower projection plates to a fixed position and combining them by the upper and lower guide wings having inclined surfaces formed at the inner ends of the upper and lower projection plates. It can be, and the contact area between the shear fixing key inserted into the keyhole and the upper and lower projection plates increases, and the separation and rotation between the upper and lower projection plates are further suppressed to further strengthen the connection state. It relates to a PHC pile connector. .

Description

PHC pile connector {Connecting device for PHC pile}

In the present invention, in the PHC pile connector in which the upper and lower rings and the upper and lower projection plates are integrally formed or the upper and lower plates and the upper and lower projection plates are integrally formed, the inner end of one support surface of the upper and lower projection plates Upper and lower guide vanes with inclined surfaces are formed, and when the upper projection plate is inserted into and coupled to the space formed between the lower projection plates, the inclined surface of the upper guide vane of the upper projection plate adheres to the inclined surface of the lower guide vane of the lower projection plate and slides. As they are coupled to each other, a keyhole consisting of only a straight surface is formed between one support surface spaced apart at a certain interval, and a shear fixing key is inserted into the keyhole to connect and couple the upper PHC pile and the lower PHC pile. will be.

Recently, with the rapid expansion of urban areas, many structures, including infrastructure such as roads and bridges and various architectural structures, are being built on soft ground. In such ground, since the depth from the ground surface to the support layer having high ground strength is generally very deep, the length of the PHC pile installed on the foundation of the structure is increased to transmit the load of the structure to the support layer.

However, since the maximum length of currently produced PHC piles is only 15 m, it is inevitable to use a plurality of PHC piles of the same diameter in connection when the depth of the support layer is 15 m or more. It was made by welding the top of the PHC pile and the single plate made of metal connected to the tip of the upper PHC pile to each other.

However, in the PHC pile connection method by welding, workability is greatly affected by climatic conditions, so in the case of wind or rain, it is difficult to weld a joint and the quality is not good. Since expensive construction equipment for constructing piles has to stop working and wait, there is a problem in that the construction cost increases due to the decrease in efficiency of the construction equipment and the consequent increase in the construction period.

In addition, in order to connect PHC piles by welding, unlike single piles in which metal single plates are not attached to the head of the PHC pile, the metal single plate must be coupled to the head or tip of the PHC pile from the time of production. In order to properly supply, there was a problem that a lot of cost was invested in inventory management of PHC piles because various types of PHC piles had to be manufactured and stocked according to the diameter, length, and connection of the piles.

In order to solve the above problems, a 'PHC file connector' has been registered as Korean Patent Registration No. 10-1983287, and the pre-registered invention is a PHC file connector in which wing plates and space parts are alternately arranged on the inner connection ring and combined. For, the wing plate of the other acupressure connecting plate is fitted into the space of one side acupressure connecting plate, and the shear fixing pin is inserted into the fixing hole formed by the semicircular coupling groove formed in the longitudinal direction of the side end at both ends of the wing plate. It is composed to

However, in the above-described pre-registered invention, since both ends of the wing plate are formed vertically, a pair of acupressure connecting plates are fixed only by shear fixing pins, and in order to firmly fix a pair of acupressure connecting plates, Semicircular coupling grooves are formed at both ends of the wing plate, and shear fixing pins must be inserted into all fixing holes formed by these coupling grooves. There was an inefficient problem in that the work time required to insert the shear fixing pin increased.

Accordingly, in order to solve the above problems, the present applicant, as shown in 'PHC pile connection device' of Publication No. 2021-0098311 and No. 2021-0098400 corresponding to 'PHC pile connector', supports both sides A semicircular coupling groove is formed only on one side support surface of the upper and lower projection plates, the surfaces of which are inclined at a certain angle in one direction from vertical, and a circular shape formed on one side support surface of the upper and lower projection plates when these upper and lower projection plates are combined. By connecting the upper and lower PHC piles by inserting a shear fixing key into the keyhole of the upper and lower PHC piles, coupling is easy and separation is suppressed. Since only /2 is used, not only material and construction costs can be reduced, but also an invention that can shorten construction time has been filed.

However, since the pile connecting device previously filed has a semicircular coupling groove formed on one side of the upper and lower protruding plates, when the pile connector is molded into a casting, in addition to the upper and lower molds made of molding sand using a mold, the core mold This additional work was complicated and costly. That is, when the pile connector is molded as a casting, first, as shown in FIGS. 1A to 1C, the upper mold, the lower mold, and the middle mold with the semicircular coupling groove protruding from the side are manufactured with casting sand using the upper mold, the lower mold, and the middle mold. And, as shown in FIG. 1D, the manufacturing process was complicated because the pile connector was manufactured by injecting molten iron while the upper and lower molds were placed on the upper and lower parts of the core mold.

On the other hand, when the semicircular coupling grooves are not formed on the side surfaces of the upper and lower protruding plates, only the upper and lower molds are used without the middle mold and the middle mold as shown in (a) to (c) of FIG. After manufacturing and combining them, it is possible to make a pile connector by injecting molten iron, so it is very easy to make a molding sand mold. That is, FIG. 1d showing that semicircular coupling grooves are formed on the side surfaces of the upper and lower projection plates is different from FIG. 2(c) showing that coupling grooves are not formed. Since it cannot be demolded in the up and down directions and can only be demoulded in the left and right directions, the core mold cannot be manufactured integrally with the upper and lower molds, and the core mold must be separately manufactured using a heavy mold. . In addition, since molten iron is injected with the core mold placed between the upper mold and lower mold for the manufacture of the pile connector, burr, a foreign substance additionally attached to the periphery of the casting product, is removed as the molten iron penetrates between each mold. It is formed in large quantities, and a large amount of post-processing is required to remove these burrs, which has the disadvantage of increasing production cost.

Republic of Korea Patent Registration No. 10-1983287 (2019. 05. 22. Registration) Republic of Korea Patent Publication No. 2021-0098311 (2021. 08. 10. Publication) Republic of Korea Patent Publication No. 2021-0098400 (2021. 08. 10. Publication)

Therefore, it was made in view of the conventional problems as described above, and the object of the present invention is to remove the semicircular coupling grooves formed on both side support surfaces of the upper and lower projection plates of the pile connector when molding the pile connector into a casting. It is to provide that the number of molds required and the number of molding sand molds produced by the mold can be reduced, or a plurality of core molds can be manufactured at once with one heavy mold, thereby reducing material costs and simplifying the work to reduce manufacturing costs. .

In addition, the present invention simplifies the structure by removing the semicircular coupling grooves formed on the support surfaces of both sides of the upper and lower projection plates, and at the same time reduces the number of molds used for forming the pile connector, thereby reducing burrs, which are foreign substances attached to the product. ) is minimized to reduce the post-processing work for removing burrs, thereby lowering the production cost.

In addition, the present invention is a guide vane having an inclined surface formed at the inner end of the upper and lower projection plates so that a keyhole consisting of only a straight surface into which a shear fixing key can be inserted is formed on one side support surface when the upper and lower projection plates are coupled. It is to provide that the workability is improved by allowing the upper projection plate and the lower projection plate to be easily moved to a predetermined position and coupled thereto.

In addition, the present invention provides that the contact area between the shear fixing key inserted into the keyhole and the upper and lower projection plates increases, thereby further suppressing separation and rotation between the upper and lower projection plates to further strengthen the connection state. .

'형상으로 형성되고 하부링의 외측면에는 양측 지지면이 '

'형상으로 형성 되도록 수직으로부터 양 방향으로 일정 각도 경사진 상·하부돌기판이 상기 상·하부돌기판과 동일한 형상의 공간부와 번갈아가면서 방사상으로 구성되고, 상기 상·하부돌기판의 일측 지지면의 내측 단부분에 경사면이 형성된 상·하부안내날개가 형성되며, 상부돌기판이 하부돌기판 사이에 형성된 공간부로 삽입·결합 시 상부돌기판의 상부안내날개의 경사면이 하부돌기판의 하부안내날개의 경사면에 밀착되어 미끄러지면서 결합됨에 따라, 일정 간격 이격된 일측 지지면 사이에 키홀(H)이 형성되고, 상기 키홀(H)에 체결되어 상·하부돌기판을 결합하는 전단고정키를 포함하며, 상기 상·하부 PHC 말뚝의 연결 후 이음부에 인장력이 작용하면 일측 지지면에서는 전단고정키에 의해 상·하부돌기판의 분리와 회전이 억제되고, 타측 지지면에서는 상부로 이동하려는 상부돌기판의 타측 지지면을 하부돌기판의 타측 지지면이 잡아줘 분리가 억제되는 것을 특징으로 한다.The PHC pile connector according to the present invention for achieving the above object is a PHC in which an upper ring and an upper projection plate fixed to the tip of the upper PHC pile and a lower ring and a lower projection plate fixed to the head of the lower PHC pile are mutually coupled. In the pile connector, on the outer surface of the upper ring, both support surfaces are '

'It is formed in the shape and the outer surface of the lower ring has both support surfaces'

The upper and lower protruding plates inclined at a certain angle in both directions from vertical to be formed in a 'shape are radially configured alternately with space parts having the same shape as the upper and lower protruding plates, and Upper and lower guide vanes with inclined surfaces are formed at the inner end, and when the upper projection plate is inserted into and coupled to the space formed between the lower projection plates, the inclined surface of the upper guide vane of the upper projection plate becomes the inclined surface of the lower guide vane of the lower projection plate. As it is coupled while sliding in close contact with it, a keyhole (H) is formed between one side support surfaces spaced apart at a predetermined interval, and a shear fixing key is fastened to the keyhole (H) to couple the upper and lower projection plates, After connecting the upper and lower PHC piles, when tensile force is applied to the joint, the separation and rotation of the upper and lower projection plates are suppressed by the shear fixing key on one side of the support surface, and the other side of the upper projection plate to move upward on the other support surface. It is characterized in that the separation is suppressed by holding the support surface on the other side of the lower protrusion plate.

' 형상으로 형성되고 하판의 상면에는 양측 지지면이 '

'형상으로 형성되도록 수직으로부터 양 방향으로 일정 각도 경사진 상·하부돌기판이 상기 상·하부돌기판과 동일한 형상의 공간부와 번갈아가면서 방사상으로 구성되고, 상기 상·하부돌기판의 일측 지지면의 내측 단부분에 경사면이 형성된 상·하부안내날개가 형성되며, 상부돌기판이 하부돌기판 사이에 형성된 공간부로 삽입·결합 시 상부돌기판의 상부안내날개의 경사면이 하부돌기판의 하부안내날개의 경사면에 밀착되어 미끄러지면서 결합됨에 따라, 일정 간격 이격된 일측 지지면 사이에 키홀(H)이 형성되고, 상기 키홀(H)에 체결되어 상·하부돌기판을 결합하는 전단고정키를 포함하며, 상기 상·하부 PHC 말뚝의 연결 후 이음부에 인장력이 작용하면 일측 지지면에서는 전단고정키에 의해 상·하부돌기판의 분리와 회전이 억제되고, 타측 지지면에서는 상부로 이동하려는 상부돌기판의 타측 지지면을 하부돌기판의 타측 지지면이 잡아줘 분리가 억제되는 것을 특징으로 한다.In addition, the present invention is a PHC pile connector in which an upper plate and an upper projection plate fixed to the front end of the upper PHC pile and a lower plate and a lower projection plate fixed to the head of the lower PHC pile are mutually coupled, and on the lower surface of the upper plate, both support surfaces are '

It is formed in the shape of ', and on the upper surface of the lower plate, both sides of the support surface are '

Upper and lower protruding plates inclined at a certain angle in both directions from vertical to be formed in a 'shape' are alternately formed radially with spaces having the same shape as the upper and lower protruding plates, and Upper and lower guide vanes with inclined surfaces are formed at the inner end, and when the upper projection plate is inserted into and coupled to the space formed between the lower projection plates, the inclined surface of the upper guide vane of the upper projection plate becomes the inclined surface of the lower guide vane of the lower projection plate. As it is coupled while sliding in close contact with it, a keyhole (H) is formed between one side support surfaces spaced apart at a predetermined interval, and a shear fixing key is fastened to the keyhole (H) to couple the upper and lower projection plates, After connecting the upper and lower PHC piles, when tensile force is applied to the joint, the separation and rotation of the upper and lower projection plates are suppressed by the shear fixing key on one side of the support surface, and the other side of the upper projection plate to move upward on the other support surface. It is characterized in that the separation is suppressed by holding the support surface on the other side of the lower protrusion plate.

According to the present invention, by removing the semicircular fastening grooves formed on both sides of the support surfaces of the upper and lower protruding plates of the pile connector and forming fastening grooves made of only straight surfaces, the number of molds and molding sand molds reduced when manufacturing connectors by casting, Since multiple core molds can be manufactured at once with one heavy mold, it has the effect of reducing production cost by simplifying work.

In addition, the present invention simplifies the structure from the semicircular fastening grooves formed on the support surfaces of both sides of the upper and lower projection plates to the fastening grooves made of only straight surfaces while reducing the number of molds and molds used for molding pile connectors, so that when molding products By minimizing the occurrence of burrs, which are foreign substances attached to the boundary between molds, post-processing work for removing burrs can be reduced, which has the effect of lowering production costs.

In addition, the present invention is a guide vane having an inclined surface formed at the inner end of the upper and lower projection plates so that a keyhole consisting of only a straight surface into which a shear fixing key can be inserted is formed on one side support surface when the upper and lower projection plates are coupled. As a result, the upper projection plate and the lower projection plate are easily moved to a predetermined position and combined, thereby improving workability.

In addition, the present invention has an effect of further strengthening the connection state by further suppressing separation and rotation between the upper and lower projection plates by increasing the contact area between the shear fixing key inserted into the keyhole and the upper and lower projection plates.

1a to 1d are cross-sectional views showing a method of manufacturing a molding sand mold with a semicircular fastening groove protruding and a mold for forming a pile connector in which they are combined
Figure 2 is a cross-sectional view showing a method of manufacturing a molding sand mold for manufacturing upper and lower protruding boards from which semicircular fastening grooves are removed and a mold for manufacturing a pile connector in which they are combined
3 is an exploded perspective view of an embodiment of the present invention
Figure 4 is a perspective view of a state in which the upper and lower protruding plates of one embodiment of the present invention are fixed with a parallelogram shear fixing key in a coupled state
Figure 5 is a perspective view of a state in which the upper and lower protrusion plates of one embodiment of the present invention are fixed with a hexagonal shear fixing key in a coupled state.
6 to 9 are front configuration views showing an assembly process of an embodiment of the present invention
10 is an exploded perspective view of another embodiment of the present invention
11 is a perspective view of a state in which the upper and lower protrusion plates of another embodiment of the present invention are fixed with a parallelogram shear fixing key in a coupled state;
12 is a perspective view of a state in which the upper and lower protrusion plates of another embodiment of the present invention are fixed with a hexagonal shear fixing key in a coupled state
13 to 16 are front configuration views showing the assembly process of another embodiment of the present invention

Hereinafter, the present invention will be described in detail based on the accompanying drawings. First, FIG. 3 is an exploded perspective view of one embodiment of the present invention, and FIG. 4 is a perspective view of a state in which the upper and lower protrusion plates of one embodiment of the present invention are fixed with a shear fixing key of a parallelogram cross section in a coupled state.

The PHC pile connector, which is an embodiment of the present invention, includes an upper ring 20 fixed to the tip of the upper PHC pile 10, an upper protrusion plate 40, and a lower ring 30 fixed to the head of the lower PHC pile 10 In the PHC pile connector in which the and the lower projection plate 50 are mutually coupled,

' 형상으로 형성되고 하부링(30)의 외측면에는 양측 지지면이 '

'형상으로 형성되도록 수직으로부터 양 방향으로 일정 각도 경사진 상·하부돌기판(40)(50)이 상기 상·하부돌기판(40)(50)과 동일한 형상의 공간부(43)(53)와 번갈아가면서 방사상으로 구성되고, 상기 상·하부돌기판(40)(50)의 일측 지지면(41)(51)의 내측 단부분에 경사면(61)(71)이 형성된 상·하부안내날개(60)(70)가 형성되며, 상부돌기판(40)이 하부돌기판(50) 사이에 형성된 공간부(53)로 삽입·결합 시 상부돌기판(40)의 상부안내날개(60)의 경사면(61)이 하부돌기판(50)의 하부안내날개(70)의 경사면(71)에 밀착되어 미끄러지면서 결합됨에 따라, 일정 간격 이격된 일측 지지면(41)(51) 사이에 곧은 면만으로 이루어진 키홀(H)이 형성되고, 상기 키홀(H)에 체결되어 상·하부돌기판(40)(50)을 결합하는 전단고정키(80)를 포함하며, 상기 상·하부 PHC 말뚝(10)(10')의 연결 후 이음부에 인장력이 작용하면 일측 지지면(41)(51)에서는 전단고정키(80)에 의해 상·하부돌기판(40)(50)의 분리와 회전이 억제되고, 타측 지지면(42)(52)에서는 상부로 이동하려는 상부돌기판(40)의 타측 지지면(42)을 하부돌기판(50)의 타측 지지면(52)이 잡아줘 분리가 억제되는 것을 특징으로 한다. On the outer surface of the upper ring 20, both side support surfaces are '

' It is formed in the shape and on the outer surface of the lower ring 30, the support surfaces on both sides are '

The upper and lower protruding plates 40 and 50 inclined at a certain angle in both directions from vertical so as to be formed in a 'shape' are space portions 43 and 53 having the same shape as the upper and lower protruding plates 40 and 50 The upper and lower guide vanes ( 60) (70) are formed, and the inclined surface of the upper guide vane 60 of the upper projection plate 40 when the upper projection plate 40 is inserted into and coupled to the space portion 53 formed between the lower projection plates 50 As (61) adheres to and slides on the inclined surface 71 of the lower guide blade 70 of the lower protruding plate 50, it consists of only a straight surface between the support surfaces 41 and 51 on one side spaced at a certain interval. A keyhole (H) is formed, and a shear fixing key 80 is fastened to the keyhole (H) to couple the upper and lower protruding plates 40 and 50, and the upper and lower PHC piles 10 ( 10 '), when a tensile force acts on the joint after connection, the separation and rotation of the upper and lower protrusion plates 40 and 50 are suppressed by the shear fixing key 80 on one side support surface 41 and 51, In the other support surface 42, 52, the other support surface 42 of the upper protrusion plate 40 to be moved upward is held by the other support surface 52 of the lower protrusion plate 50 to suppress separation. to be

At this time, the thickness of the upper and lower rings 20 and 30 is 1/2 of the thickness of the upper and lower protruding plates 40 and 50, so that the upper and lower rings 20 and 30 overlap each other. The protruding plates 40 and 50 are coupled, which corresponds to the case where the sum of the respective heights of the upper and lower rings 20 and 30 is equal to the height of the upper and lower protruding plates 40 and 50.

One embodiment of the present invention removes the semicircular fastening grooves formed on the sides of the upper and lower protruding plates 40 and 50 of the conventional pile connector and forms a fastening groove made of only the straight surface, so that the pile connector is molded into a casting. It is possible to reduce the number of molds and molding sand molds produced using the mold, thereby reducing manufacturing costs, and reducing the number of molds used for product molding, thereby reducing burrs, which are foreign substances attached to the product at the boundary between molds. ) can be minimized, so the post-processing work to remove these burrs can be minimized, which can lower the production cost, and the contact between the shear fixing key 80 inserted into the keyhole H and the upper and lower projection plates As the area is increased, separation and rotation between the upper and lower protruding plates 40 and 50 are more strongly suppressed, thereby having an effect of making the connection state more robust.

An upper ring 20, an upper projection plate 40, a lower ring 30 and a lower projection plate 50 are formed on the head of the lower PHC pile 10' facing each other with the front end of the upper PHC pile 10, respectively. It is fixed.

The upper and lower protruding plates 40 and 50 formed radially on the outer surfaces of the upper and lower rings 20 and 30 have support surfaces on both sides inclined at a certain angle in both directions from vertical, and the upper and lower protruding plates It is characterized in that space portions 43 and 53 into which the upper and lower protruding plates 40 and 50 can be inserted and coupled are formed between the (40) and (50).

'형태로 형성되거나, 상기 상·하부돌기판(40)(50)을 중자금형을 사용하지 않으면서 상·하부형틀 제작에 지장이 없도록 도 5와 같이 각각 '

'과 '

'형상으로 형성함으로써 일정 간격 이격된 일측 지지면(41)(51) 사이에 형성되는 키홀(H)에 체결되는 전단고정키(80)의 단면 형상은 육각형 형태의 단면인 '

'형태로도 형성될 수 있다.When the upper and lower PHC piles 10 and 10' are connected, the inclined surface 61 of the upper guide vane 60 formed at the inner end of the support surface 41 on one side of the upper protruding plate 40 is the lower protruding plate. The upper and lower protruding plates 40 and 50 naturally slide and rotate at the same time in a state of close contact along the inclined surface 71 of the lower guide vane 70 formed at the inner end of one side support surface 51 of (50). As this is mutually coupled, the cross-sectional shape of the shear fixing key 80 fastened to the keyhole H of the parallelogram cross section formed between the support surfaces 41 and 51 on one side spaced at a certain interval is '

'form, or the upper and lower protruding plates 40 and 50 as shown in FIG. 5 so that there is no problem in manufacturing the upper and lower molds without using heavy molds'

'class '

'The cross-sectional shape of the shear fixing key 80 fastened to the keyhole H formed between the support surfaces 41 and 51 on one side spaced at a certain interval by forming it in a shape is a hexagonal cross-section'

'It can also be formed in the form.

In addition, if necessary, the inclined slopes of the other support surface 42, 52 and the inclined surfaces 61, 71 of the upper and lower guide vanes 60, 70 may be formed identically based on the vertical. and may be formed differently, which is, if the inclination of the inclined surface 61, 71 of the other support surface 42, 52 and the upper and lower guide vanes 60, 70 is the same, the upper projection plate 40 Since the inlet width and the inlet width of the space portion 43 (53) of the lower protruding plate 50 are the same, it may not be easy to combine the upper and lower protruding plates 40 and 50. When the slope of the inclined surfaces 61 and 71 of the upper and lower guide vanes 60 and 70 is greater than the slope of the other support surface 42 and 52, the upper and lower protruding plates 40 and 50 Since the inlet width of the space portion 43 or 53 is larger than the inlet width, coupling of the upper and lower protruding plates 40 and 50 is facilitated.

The key hole (H) is preferably formed with the same cross section as the shear fixing key 80 so that the shear fixing key 80 can be inserted by hitting with an interference fit without a separate gap, and the upper and lower protruding plates 40 ) The shear fixing key 80 inserted into the keyhole H by the upper and lower guide vanes 60 and 70 having inclined surfaces 61 and 71 formed at the inner end of 50 is the inside of the pile connector. It is prevented from protruding into empty space.

In addition, although not specifically shown in the drawing, the keyhole (H) and the shear fixing key 80 are manufactured in a tapered shape in which the cross section gradually decreases from the outside to the inside, and the shear fixing key is fastened to the keyhole (H) You can minimize damage while doing it.

The upper and lower protruding plates 40 and 50 are formed with chamfered portions 90 at vertical or higher angles at the corners of the inlets of one side support surfaces 41 and 51 and the other side support surfaces 42 and 52, The upper and lower protruding plates 40 and 50 may be easily coupled with the space portions 43 and 53.

6 to 9 are front configuration views showing the assembly process of an embodiment of the present invention with respect to the above configuration, and the upper and lower protruding plates integrally formed with the front ends and heads of the upper and lower PHC piles 10 and 10'. (40) (50) and the upper and lower rings 20 and 30 are respectively positioned, and then fixing bolts are inserted through the holes formed in the upper and lower protruding plates 40 and 50 to form an upper ring 20 integrally formed. ) and the upper projection plate 40 are fixed to the front end of the upper PHC pile 10 and the lower ring 30 and the lower projection plate 50 to the head of the lower PHC pile 10 in a conventional manner.

In the state in which the upper and lower PHC piles 10 and 10' to which the upper and lower rings 20 and 30 integrally formed and the upper and lower protruding plates 40 and 50 are fixed as described above are manufactured, the lower After inserting the PHC pile (10') into the drilled hole for connecting the pile, the upper PHC pile (10) is lifted with equipment such as a crane to connect the upper PHC pile (10) to the lower PHC pile (10'). In the state, it is seated on the top of the lower PHC pile (10 ').

At this time, after the upper projection plate 40 is positioned on the same vertical line as the space portion 53 formed between the lower projection plates 50, when the upper PHC pile 10 is lowered, one side of the upper projection plate 40 The inclined surface 61 of the upper guide vane 60 formed on the inner end of the support surface 41 is the inclined surface of the lower guide vane 70 formed on the inner end of one side support surface 51 of the lower protruding plate 50. As the upper protruding plate 40 is inserted and coupled to the space portion 53 between the lower protruding plates 50 as it is naturally closely attached along the 71 and coupled while sliding and rotating at the same time, one side support surface spaced apart at a certain interval A keyhole (H) having a cross section of a parallelogram is formed between (41) (51), and the other support surfaces (42) (52) come into close contact with each other.

On the other hand, when the upper projection plate 40 is coupled to the space portion 53 formed between the lower projection plates 50, one side support surfaces 41 and 51 of the upper and lower projection plates 40 and 50 Since the chamfered portion 90 is formed at the corner of the inlet of the other side support surface 42, 52, the upper protruding plate 40 is easily inserted into the space 53 between the lower protruding plates 50. that can be combined.

That is, a keyhole H made of only straight surfaces is formed between the support surfaces 41 and 51 on one side, and the keyhole H is not formed between the support surfaces 42 and 52 on the other side, maintaining a state in close contact with each other. And, after inserting the shear fixing key 80 into the keyhole H formed between the one side support surfaces 41 and 51 as described above, when the shear fixing key 80 is hit using a tool, the shear fixing key 80 enters the keyhole ( H), the joint construction of the upper and lower PHC piles 10 (10') is completed.

As described above, when the tensile force acts on the pile joint in the state in which the upper and lower PHC piles 10 and 10' are connected according to the present invention, it is inserted into the keyhole H between the support surfaces 41 and 51 on one side. The contact area between the shear fixing key 80 and the upper and lower protruding plates 40 and 50 increases to further suppress separation and rotation between the upper and lower protruding plates, thereby making the connection more robust.

Next, FIG. 10 is an exploded perspective view of another embodiment of the present invention, and FIG. 11 is a perspective view of a state in which the upper and lower protrusion plates of another embodiment of the present invention are fixed with a shear fixing key of a parallelogram cross section in a coupled state.

' 형상으로 형성되고 하판(30')의 상면에는 양측 지지면이 '

'형상으로 형성되도록 수직으로부터 양 방향으로 일정 각도 경사진 상·하부돌기판(40')(50')이 상기 상·하부돌기판(40')(50')과 동일한 형상의 공간부(43')(53')와 번갈아가면서 방사상으로 구성되고, 상기 상·하부돌기판(40')(50')의 일측 지지면(41')(51')의 내측 단부분에 경사면(61')(71')이 형성된 상·하부안내날개(60')(70')가 형성되며, 상부돌기판(40')이 하부돌기판(50') 사이에 형성된 공간부(53')로 삽입·결합될 때 상부돌기판(40')의 상부안내날개(60')의 경사면(61')이 하부돌기판(50')의 하부안내날개(70')의 경사면(71')에 밀착되어 미끄러지면서 결합됨에 따라, 일정 간격 이격된 일측 지지면(41')(51') 사이에 곧은 면만으로 이루어진 키홀(H)'이 용이하게 형성되고, 상기 키홀(H)'에 체결되어 상·하부돌기판(40')(50')을 결합하는 전단고정키(80')를 포함하며, 상기 상·하부 PHC 말뚝(10)(10')의 연결 후 이음부에 인장력이 작용하면 일측 지지면(41')(51')에서는 전단고정키(80')에 의해 상·하부돌기판(40')(50')의 분리와 회전이 억제되고, 타측 지지면(42')(52')에서는 상부로 이동하려는 상부돌기판(40')의 타측 지지면(42')을 하부돌기판(50')의 타측 지지면(52')이 잡아줘 분리가 억제되는 것을 특징으로 한다. Another embodiment of the present invention, the PHC pile connector, has an upper plate 20 'fixed to the front end of the upper PHC pile 10, an upper projection plate 40', and a lower plate 30 fixed to the head of the lower PHC pile 10'. In the PHC pile connector in which ') and the lower protrusion plate 50' are mutually coupled, the lower surface of the upper plate 20' has both support surfaces '

' It is formed in the shape and on the upper surface of the lower plate 30 ', both sides of the support surface are '

The upper and lower protruding plates 40' and 50' inclined at a certain angle in both directions from the vertical so as to be formed in a 'shape' are space portions 43 having the same shape as the upper and lower protruding plates 40' and 50'. ') (53') alternately and radially, and an inclined surface (61') at the inner end of one side support surface (41') (51') of the upper and lower protruding plates (40') (50'). Upper and lower guide vanes 60' and 70' formed with 71' are formed, and the upper protruding plate 40' is inserted into the space 53' formed between the lower protruding plates 50'. When coupled, the inclined surface 61' of the upper guide vane 60' of the upper protruding plate 40' adheres to the inclined surface 71' of the lower guide vane 70' of the lower protruding plate 50' and does not slip. As it is coupled while being coupled, a keyhole (H)' consisting of only straight surfaces is easily formed between the support surfaces (41') (51') on one side spaced at a certain interval, and is fastened to the keyhole (H)' to form upper and lower stones It includes a shear fixing key 80 'for coupling the substrates 40' and 50', and when the tensile force acts on the joint after connecting the upper and lower PHC piles 10 and 10', one side support surface ( In 41') (51'), separation and rotation of the upper and lower protruding plates 40' and 50' are suppressed by the shear fixing key 80', and in the other support surfaces 42' and 52' It is characterized in that the other support surface 52' of the lower protrusion plate 50' holds the other support surface 42' of the upper protrusion plate 40' to be moved upward, thereby suppressing separation.

Another embodiment of the present invention removes the semicircular fastening grooves formed on both sides of the upper and lower protruding plates 40' and 50' of the conventional pile connector and forms fastening grooves made of only straight surfaces, thereby molding the pile connector into a casting. In this case, it is possible to manufacture a plurality of molding sand core molds at once with one heavy mold, which makes the work simple and reduces the production cost. In addition, since the present invention has a simple structure by removing the semicircular fastening groove, it is possible to reduce the occurrence of burr, which is a foreign substance attached to the product during product manufacturing, so that the post-processing work for removing the burr can be minimized and production The cost can be lowered, and the contact area between the shear fixing key 80' inserted into the keyhole (H)' and the upper and lower projection plates is increased, so that separation and separation between the upper and lower projection plates 40' and 50' Rotation is suppressed more strongly, which has the effect of making the connection state more robust.

The head of the lower PHC pile 10' facing each other with the tip of the upper PHC pile 10 has an upper plate 20', an upper projection plate 40', a lower plate 30' and a lower projection plate 50', respectively. ) is fixed.

The upper and lower protruding plates 40' and 50' radially formed on the lower surface of the upper plate 20' and the upper surface of the lower plate 30' have support surfaces on both sides inclined at a certain angle in both directions from vertical, Between the upper and lower protruding plates 40' and 50', spaces 43' and 53' into which the upper and lower protruding plates 40' and 50' can be inserted and coupled are formed. to be characterized

' 형태로 형성되거나, 상기 상·하부돌기판(40')(50')을 1개의 중자금형으로 한 번에 다수개의 주물사 중자형틀이 제작될 수 있도록 도 12와 같이 각각 '

'과 '

'형상으로 형성함으로써 일정 간격 이격된 일측 지지면(41')(51') 사이에 형성되는 키홀(H)'에 체결되는 전단고정키(80')의 단면 형상을 눕혀진 육각형 형태의 단면인 '

'형태로도 형성할 수 있다. The upper and lower protruding plates 40' and 50' are composed of one side support surface 41' and 51' and the other side support surface 42' and 52', and one side support surface 41' ( Upper and lower guide vanes 60' and 70' formed with inclined surfaces 61' and 71' are formed at the inner end of 51'), and the other support surface 42' and 52' are formed straight. Since the inclined plane is formed, the inclined plane of the upper guide vane 60' formed at the inner end of the support surface 41' on one side of the upper protruding plate 40' when the upper and lower PHC piles 10 and 10' are connected. (61') naturally comes into close contact with the inclined surface (71') of the lower guide vane (70') formed on the inner end of one side support surface (51') of the lower protruding plate (50'), slides and rotates at the same time, and is engaged. Accordingly, the cross-sectional shape of the shear fixing key 80' fastened to the keyhole (H), which is a parallelogram cross section, between the support surfaces 41' and 51' on one side spaced at a certain interval is '

' form, or the upper and lower protruding plates 40' and 50' as one heavy mold, so that a plurality of molding sand core molds can be manufactured at once, as shown in FIG. 12, respectively.

'class '

The cross-sectional shape of the shear fixing key 80' fastened to the keyhole (H) formed between the support surfaces 41' and 51' on one side spaced at a certain distance by being formed into a 'shape' is a hexagonal cross-section in which the cross-section is laid '

'It can also be formed in the form.

In addition, if necessary, the inclined slope of the inclined surfaces 61', 71' of the other support surface 42', 52' and the upper and lower guide vanes 60', 70' based on the vertical may be formed identically or may be different, which is the inclination of the inclined surfaces 61', 71' of the other support surface 42', 52' and the upper and lower guide vanes 60', 70' If is the same, the width of the entrance of the upper and lower projection plates 40' and 50' and the width of the entrance of the space 43' and 53' are the same, so that the upper and lower projection plates 40' and 50' ) may not be easily coupled to each other, and the inclined slope of the inclined surfaces 61' and 71' of the upper and lower guide vanes 60' and 70' relative to the vertical is the other support surface 42' When the inclination of (52') is larger than that of the upper and lower projecting plates (40') (50'), the entrance width of the space (43') (53') is larger than the entrance width of the upper and lower projection plates (40') (50'). Mutual coupling of (40') and (50') becomes easy.

The keyhole (H)' is preferably formed with the same cross section as the shear fixing key 80' so that the shear fixing key 80' can be inserted by hitting with a forced fit without a separate gap, and the upper and lower stones A keyhole (H) made of only straight surfaces by upper and lower guide vanes (60') (70') having inclined surfaces (61') (71') formed at the inner ends of the substrates (40') (50') The shear fixing key 80 'to be inserted into is prevented from protruding into the empty space inside the pile connector.

In addition, although not specifically shown in the drawing, the keyhole (H)' and the shear fixing key 80' are manufactured in a tapered shape in which the cross section gradually decreases from the outside to the inside, and is sheared to the keyhole (H)' It is also possible to minimize the blow when engaging the key.

One side support surface (41') (51') of the upper and lower protruding plates (40') (50') A chamfer 90' is formed at the corner of the inlet of the other support surface 42', 52' at a vertical or higher angle so that the upper and lower protruding plates 40' and 50' and the space 43' ) (53 ') may be facilitated.

13 to 16 are front configuration views showing the assembly process of another embodiment of the present invention with respect to the above configuration, and the upper and lower plates 20 integrally formed with the front ends and heads of the upper and lower PHC piles 10 and 10'. After positioning the ') (30') and the upper and lower protruding plates 40' and 50', respectively, a fixing bolt is inserted through the hole h formed in the upper and lower protruding plates 40' and 50'. The upper plate 20 'and the upper projection plate 40' integrally formed at the front end of the upper PHC pile 10 and the lower plate 30' and the lower projection plate 50' of the lower PHC pile 10' It is fixed to the head in the usual way.

Upper and lower PHC piles 10 and 10' to which the upper and lower plates 20' and 30' integrally formed as described above and the upper and lower protruding plates 40' and 50' are respectively fixed are manufactured. In the state, after inserting the lower PHC pile 10' into the drilled hole for pile joint, in order to connect the upper PHC pile 10 to the lower PHC pile 10', the upper PHC pile 10 is used such as a crane. It is seated on the upper part of the lower PHC pile (10') in the state of being lifted by the equipment.

At this time, after positioning the upper projection plate 40 'on the same vertical line as the space portion 53' formed between the lower projection plates 50', and then lowering the upper PHC pile 10', the upper projection plate ( The inclined surface 61' of the upper guide vane 60' formed on the inner end of one support surface 41' of 40' is the inner end of one support surface 51' of the lower protruding plate 50'. Along the inclined surface 71' of the lower guide vane 70' formed therein, the upper protrusion plate 40' comes into close contact while sliding and rotating at the same time, so that the upper protrusion plate 40' is formed in the space 53 '), a keyhole H' having a cross section of a parallelogram is formed between the support surfaces 41' and 51' on one side spaced at a certain interval, and the other support surfaces 42' and 52' on the other side. ) is in close contact at a certain angle.

On the other hand, when the upper protruding plate 40' is coupled to the space portion 53' formed between the lower protruding plates 50', one side support surface of the upper and lower protruding plates 40' and 50' ( Since the chamfered portion 90' is formed at the corner of the inlet of 41') (51') or the other support surface 42', 52', the upper projection plate 40' is the lower projection plate 50' It can be easily inserted and coupled into the space portion 53 'between.

That is, a keyhole H' is formed between the support surfaces 41' and 51' on one side, and the keyhole H' is not formed between the support surfaces 42' and 52' on the other side, and they are in close contact with each other. And, as described above, after inserting the shear fixing key 80' into the keyhole H' formed between the support surfaces 41' and 51' on one side, when the shear fixing key 80' is hit using a tool, the shear fixing key As (80') is coupled to the keyhole (H)', the joint construction of the upper and lower PHC piles (10) (10') is completed.

Therefore, as described above, when the tensile force acts on the joint in the state in which the upper and lower PHC piles 10 and 10' are connected according to the present invention, the keyhole (H) between the support surfaces 41' and 51' on one side )', the contact area between the shear fixing key 80 'and the upper and lower projection plates 40' and 50' is increased to further suppress separation and rotation between the upper and lower projection plates, thereby improving the connection state. make it more robust

As described above, although the present invention has been described with limited examples and drawings, the terms or words used in this specification and claims should not be construed as being limited to a common or dictionary meaning, and do not reflect the technical spirit of the present invention. It must be interpreted with the corresponding meaning and concept. Therefore, the embodiments described in this specification and the configurations shown in the drawings are only one embodiment of the present invention, and do not represent all of the technical spirit of the present invention, so that various It should be understood that there may be equivalents and variations.

10: upper PHC pile 10 ': lower PHC pile
20: upper ring 20 ': top plate
30: lower ring 30 ': lower plate
40, 40': upper protrusion plate 41, 41: one side support surface
42, 42': other support surface 43, 43': space
50, 50': lower protrusion plate 51, 51': one side support surface
52, 52': other support surface 53, 53': space
60, 60': upper guide wing 61, 61': slope
70, 70': lower guide wing 71, 71': slope
80, 80': shear fixing key 90, 90': chamfering
(H), (H)': Keyhole

Claims (6)

The upper ring 20 and the upper projection plate 40 fixed to the tip of the upper PHC pile 10, and the lower ring 30 and the lower projection plate 50 fixed to the head of the lower PHC pile 10' are mutually connected. In the combined PHC pile connector,
On the outer surface of the upper ring 20, both side support surfaces are '

'It is formed in the shape and the outer surface of the lower ring 30 has both support surfaces'

The upper and lower protruding plates 40 and 50 inclined at a certain angle in both directions from the vertical so as to be formed in a 'shape' are space portions 43 and 53 having the same shape as the upper and lower protruding plates 40 and 50 It is composed of radially alternating with,
Upper and lower guide vanes 60 and 70 having inclined surfaces 61 and 71 are formed at the inner ends of one side support surfaces 41 and 51 of the upper and lower protruding plates 40 and 50, , When the upper projection plate 40 is inserted into and coupled to the space 53 formed between the lower projection plates 50, the inclined surface 61 of the upper guide vane 60 of the upper projection plate 40 is the lower projection plate ( 50) is closely attached to the inclined surface 71 of the lower guide blade 70 and coupled while sliding, a keyhole H is formed between the support surfaces 41 and 51 on one side spaced at a certain interval,
It includes a shear fixing key 80 fastened to the keyhole H to couple the upper and lower protrusion plates 40 and 50,
After connecting the upper and lower PHC piles 10 and 10', when a tensile force acts on the joint, the upper and lower protruding plates 40 ( 50) is suppressed, and the other side support surface 42, 52, the other side support surface 42 of the upper protrusion plate 40, which is to be moved to the top, is suppressed. ) PHC pile connector, characterized in that separation is suppressed by holding.
An upper plate 20' and an upper projection plate 40' fixed to the tip of the upper PHC pile 10, and a lower plate 30' and a lower projection plate 50' fixed to the head of the lower PHC pile 10' In this mutually coupled PHC pile connector,
On the lower surface of the upper plate 20 ', the support surfaces on both sides are '

' It is formed in the shape and on the upper surface of the lower plate 30 ', both sides of the support surface are '

The upper and lower protruding plates 40' and 50' inclined at a certain angle in both directions from the vertical so as to be formed in a 'shape' are space portions 43 having the same shape as the upper and lower protruding plates 40' and 50'. ') (53') and alternately radially configured,
Upper and lower guide vanes 60' formed with inclined surfaces 61' and 71' at the inner ends of one side support surfaces 41' and 51' of the upper and lower protruding plates 40' and 50'. ) (70') is formed, and when the upper protrusion plate 40' is inserted into and coupled to the space portion 53' formed between the lower protrusion plates 50', the upper guide vane of the upper protrusion plate 40' ( As the inclined surface 61' of 60' comes into close contact with the inclined surface 71' of the lower guide vane 70' of the lower protruding plate 50' and is coupled while sliding, one side support surface 41' spaced apart at a certain interval. ) A keyhole (H)' is formed between 51',
It includes a shear fixing key 80' fastened to the keyhole H' and coupling the upper and lower protrusion plates 40' and 50',
After connecting the upper and lower PHC piles 10 and 10', when a tensile force acts on the joint, the upper and lower protruding plates ( Separation and rotation of 40') (50') is suppressed, and the other support surface 42' of the upper projection plate 40' to be moved upward is moved to the upper projection plate on the other support surface 42'(52'). The PHC pile connector, characterized in that the other side support surface (52') of (50') holds and suppresses separation.
According to any one of claims 1 or 2,
The cross-sectional shape of the shear fixing keys 80 and 80' is '

'either'

PHC pile connector, characterized in that formed by '.
According to any one of claims 1 or 2,
One side support surface 41 (41') (51) (51') or the other side support surface 42, 42' ( 52) (52') by forming chamfered portions (90) (90') at the corners of the inlet portion to form upper and lower protruding plates (40) (40') (50) (50') and space portions (43) (43). ') (53) (53') PHC pile connector, characterized in that it facilitates the coupling.
According to any one of claims 1 or 2,
The inclined slope of the inclined surface 61 (61') (71) (71') of the upper and lower guide vanes (60) (60') (70) (70') relative to the vertical is the other support surface (42'). ) PHC pile connector, characterized in that it is greater than or equal to the slope of (52 ').
According to any one of claims 1 or 2,
PHC pile connector, characterized in that the key hole (H) (H) 'and the shear fixing keys 80 and 80' are formed in a tapered shape in which the cross section gradually decreases from the outside to the inside.

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