EP1288382A2 - A joint for reinforced concrete pile sections - Google Patents

A joint for reinforced concrete pile sections Download PDF

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Publication number
EP1288382A2
EP1288382A2 EP02396128A EP02396128A EP1288382A2 EP 1288382 A2 EP1288382 A2 EP 1288382A2 EP 02396128 A EP02396128 A EP 02396128A EP 02396128 A EP02396128 A EP 02396128A EP 1288382 A2 EP1288382 A2 EP 1288382A2
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EP
European Patent Office
Prior art keywords
spring
annular
groove
joint
section
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Granted
Application number
EP02396128A
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German (de)
French (fr)
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EP1288382A3 (en
EP1288382B1 (en
Inventor
Kari Koivunen
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Emeca Oy
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Emeca Oy
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Publication date
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Publication of EP1288382A3 publication Critical patent/EP1288382A3/en
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Publication of EP1288382B1 publication Critical patent/EP1288382B1/en
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    • EFIXED CONSTRUCTIONS
    • E04BUILDING
    • E04BGENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/18Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons
    • E04B1/20Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons the supporting parts consisting of concrete, e.g. reinforced concrete, or other stonelike material
    • E04B1/21Connections specially adapted therefor
    • E04B1/215Connections specially adapted therefor comprising metallic plates or parts
    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02DFOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D5/00Bulkheads, piles, or other structural elements specially adapted to foundation engineering
    • E02D5/22Piles
    • E02D5/52Piles composed of separable parts, e.g. telescopic tubes ; Piles composed of segments
    • EFIXED CONSTRUCTIONS
    • E04BUILDING
    • E04BGENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/18Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons
    • E04B1/20Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons the supporting parts consisting of concrete, e.g. reinforced concrete, or other stonelike material
    • E04B1/21Connections specially adapted therefor

Definitions

  • the present invention relates to a joint between two objects to be joined together, such as reinforced concrete pillars, said joint comprising
  • each pillar to be joined has at its one end four guiding and locking spigots provided with a transverse hole, which fit into corresponding cavities provided at the end of the opposite pillar when the pillars are set end to end to form extensions of each other.
  • the butt joint is locked by inserting locking splines laterally through the transverse holes in the pillar ends and through the holes provided at a corresponding position in the guiding and locking spigots.
  • this method of making a joint has proved to be difficult and laborious in practice.
  • transverse holes in the pillar ends and the holes of the guiding and locking spigots are not always properly aligned, so it is difficult to drive the transverse locking splines into position.
  • one or more of the locking splines of the joint are left out, so a weak butt joint is formed between the pillars.
  • the joining element at the end of a pillar to be extended comprises a round spigot, which is fitted into a round cavity at the end of another pillar, said cavity being provided with an annular groove and an annular spring.
  • the end of the spigot is conically shaped so that, when inserted into the cavity, it opens and strains the annular spring in the cavity.
  • the object of the present invention is to achieve a butt joint for pillars that does not have the above-described disadvantages.
  • the joint of the invention for joining two objects is characterized in that the groove of the joining element of at least one of the objects to be joined is provided with a wedge-like part on which the spring-like locking element is wedged.
  • a preferred embodiment of the joint of the invention is characterized in that the annular groove in the projecting part of the first joining element has a wedge-shaped cross-section so that at least one of the side walls of the groove forms an element, such as a conical surface, that produces a wedging effect on the spring-like locking element.
  • a second preferred embodiment of the joint of the invention is characterized in that the spring-like locking element is a severed annular spring having a rectangular cross-section.
  • a fourth preferred embodiment of the joint of the invention is characterized in that the spring-like locking element is a severed annular spring of circular cross-section.
  • a further preferred embodiment of the joint of the invention is characterized in that the annular groove in the cavity has a wedge-shaped cross-section such that at least one of the side walls of the groove forms an element, such as a conical surface, that produces a wedging effect on the spring-like locking element.
  • Fig. 1 illustrates a situation where two reinforced concrete pillars 10a and 10b are being joined together end to end, with the pillar ends brought close to each other but still remaining apart.
  • the principal material of the pillars 10a and 10b is concrete 11, in addition to which they also contain numerous steel reinforcements as is known in the art, which are not shown.
  • Fig. 1 presents a detailed illustration of the structure of the joining elements 20a and 20b.
  • Each joining element 20a and 20b comprises an end plate 21a and 21, an edge collar 22a and 22b welded on it and anchor bars 23a and 23b welded to the end plates 21a and 21.
  • the joining element 20a of the reinforced concrete pillar 10a shown above the other one in Fig. 1 comprises a cylindrical projecting part 30 welded to the end plate 21a and having an annular groove 31 in the outer surface of its cylinder barrel.
  • the inner end of the cylinder 30 is closed by a bottom plate 32.
  • the joining element 20b of the reinforced concrete pillar 10b shown below the other one in Fig. 1 comprises a cylindrical cavity 40 welded to the end plate 21b and having an annular groove 41 in the inner surface of its cylinder barrel.
  • This cylinder 40 is provided with a bottom plate 42.
  • the extremity of the cylindrical projecting part 30 is shaped as a conical surface 33, which, when the reinforced concrete pillars 10a and 10b are being joined together, causes the severed annular spring 50 in the groove 31 of the cavity 40 to open until the spring falls into the groove 31 of the projecting part 30, locking the joint between the joining elements 20a and 20b and therefore the joint between the reinforced concrete pillars 10a and 10b.
  • Fig. 1 it can be seen that it is possible to add a suitable number of reinforcing rods to the circumference of the joining elements 20a and 20b in accordance with the strength requirements regarding the joint between the reinforced concrete pillars 10a and 10b.
  • Fig. 2 presents the structure of the joining elements 20a and 20b of reinforced concrete pillars 10a and 10b in vertical section.
  • the projecting cylindrical part 30 attached to the end plate 21a of the upper pillar 10a has a conical end 33 and an annular groove 31. It can be seen from the figure that one 34 of the side walls of the annular groove 31 is inclined, forming an angle ⁇ with a plane perpendicular to the longitudinal axis of the cylinder 30. Since the projection 30 is a round cylinder, the inclined wall 34 forms a conical surface.
  • the angle ⁇ preferably has a magnitude of only a few degrees. An inclination of e.g.
  • the cylinder 40 of the joining element 20b of the lower pillar 10b is provided with an internal annular groove 41 of rectangular cross-section, with a severed annular spring 50 of rectangular cross-section placed in the groove.
  • a and b indicate the distances from the edges of the annular grooves 31 and 41 to the stop faces of the reinforced concrete pillars 10a and 10b to be placed against each other. In manufacture, these measurements are essential to flawless functioning of the joining elements 20a and 20b. To allow the annular spring 50 to be effectively locked against the conical surface 34, measurement a must be smaller than or equal to measurement b.
  • Fig. 3 shows the reinforced concrete pillars 10a and 10b of Fig. 2 joined together, with the annular spring 50 latched in the groove 31 of the projecting part 30 of the joining element of the upper reinforced concrete pillar 10a. Since the annular spring 50 was expanded by the conical surface 33 of the projecting part 30 during the insertion movement, in the locked state of the joint the annular spring 50 is still exerting compression. Thus, the annular spring 50 is wedged against the conical surface 34 of the groove 31. When the pillar thus extended is jolted by impacts applied to the end of the upper pillar, each impact will cause the annular spring 50 to be more and more tightly wedged against the conical surface 34, a very firm joint being thus formed.
  • Fig. 4 presents an embodiment in which a more effective wedging of the annular spring 50 as the conical surface 34 is additionally ensured by using screws 51a and 51b that press the annular spring towards the bottom of the groove 31.
  • Fig. 5 presents a diagrammatic vertical section of a joint connecting two objects, in which the cylindrical projecting part 30 has been pressed into the cylindrical cavity of the other object.
  • both the groove 31 of the cylindrical projecting part 30 and the annular spring 50 have a wedge-shaped cross-section, i.e. both have conical surfaces, which are placed against each other.
  • the annular spring 50 is wedged still more effectively into the groove 31, interlocking the projecting part 30 and the cavity 40 of the joining elements.
  • Fig. 6 presents an alternative annular spring 50, according to which the annular spring 50 has a circular cross-section.
  • Fig. 7 presents a joint between a reinforced concrete pillar 10 and a rock shoe 60 in vertical section.
  • the structure of this joint fully corresponds to the above-described joint between two pillars.
  • a rock shoe 60 as shown here can be joined to the end of any pillar.
  • an actual shoe part 61 is fastened with a screw 62 to a frame part 63, which corresponds to the cylinder 40 of the joining element 20b at the end of a pillar 10b.
  • This frame cylinder 63 has inside it a corresponding cavity and an annular groove 65 for an annular spring 50.
  • the frame cylinder 63 is attached to an end plate 64, which meets the end plate 21 of the pillar.
  • Fig. 8 presents an alternative joint between reinforced concrete pillars 10a and 10b, where, before the joining, the annular spring 50 is placed in the groove 31 of rectangular cross-section of the projecting part 30.
  • the mouth of the cavity 40 has a conical shape 43 that compresses the annular spring 50 as the pillars are being joined together.
  • the annular spring 50 will expand into the groove 41 in the cavity 40 and get wedged against the conical surface 44.
  • the operation of the annular spring 50 is thus reversed.
  • the inclined surface 44 of the groove 41 in the cavity 40 must be located on the opposite side.

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  • Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Civil Engineering (AREA)
  • Architecture (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Electromagnetism (AREA)
  • Physics & Mathematics (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Mining & Mineral Resources (AREA)
  • Paleontology (AREA)
  • General Engineering & Computer Science (AREA)
  • Piles And Underground Anchors (AREA)
  • Joining Of Building Structures In Genera (AREA)
  • Bulkheads Adapted To Foundation Construction (AREA)

Abstract

A joint for joining reinforced concrete pillars (10a, 10b) together, wherein a first connecting element (20a) comprises a cylindrical projecting part (30) provided with an annular groove (31) and a second connecting element (20b) consists of a cavity (40, 63) provided with an annular groove (41, 65). An annular spring (50) interlocks the grooves (31, 41, 65). The groove of the joining element of at least one of the objects to be joined is provided with a wedge-like part (34, 44) on which the spring-like locking element (50) is wedged, forming a joint free of backlash.

Description

    SUBJECT OF THE INVENTION
  • The present invention relates to a joint between two objects to be joined together, such as reinforced concrete pillars, said joint comprising
    • a first connecting element at the end of a first object to be joined, such as a pillar, consisting of a projecting part, preferably a spigot having a circular cross-section and provided with an annular groove,
    • a second connecting element at the end of a second object to be joined, such as a pillar or equivalent, said connecting element consisting of a cavity, preferably a dead hole having a circular cross-section and provided with an annular groove,
    • a spring-like locking element, preferably an annular spring or a part of one, which locks the groove of the first connecting element to the groove of the second connecting element.
    PRIOR ART
  • There are various solutions for making a butt joint between reinforced concrete pillars. Generally used is a butt joint solution in which each pillar to be joined has at its one end four guiding and locking spigots provided with a transverse hole, which fit into corresponding cavities provided at the end of the opposite pillar when the pillars are set end to end to form extensions of each other. The butt joint is locked by inserting locking splines laterally through the transverse holes in the pillar ends and through the holes provided at a corresponding position in the guiding and locking spigots. However, this method of making a joint has proved to be difficult and laborious in practice. The transverse holes in the pillar ends and the holes of the guiding and locking spigots are not always properly aligned, so it is difficult to drive the transverse locking splines into position. In this case, one or more of the locking splines of the joint are left out, so a weak butt joint is formed between the pillars.
  • As the above-mentioned types of butt joint have proved to be very problematic in practice, there has arisen a need to develop different bayonet-connector type joining elements even for butt joints between reinforced concrete pillars. According to one solution, the joining element at the end of a pillar to be extended comprises a round spigot, which is fitted into a round cavity at the end of another pillar, said cavity being provided with an annular groove and an annular spring. The end of the spigot is conically shaped so that, when inserted into the cavity, it opens and strains the annular spring in the cavity. When the ends of the reinforced concrete pillars to be joined together meet at the end of the insertion movement, being pressed against each other, the annular spring latches into the annular groove of the spigot, thus locking the joint.
  • The above-described bayonet-type joint, which in principle is easy to use, has not, however, proved to be a workable solution for joining reinforced concrete pillars end to end. One of the reasons for this is that, when the pillars are being set end to end as extensions of each other, they have to be brought into tight contact and perfect alignment with each other before the annular spring in the cavity of the joining element at the end of one of the pillars is locked in the annular groove of the spigot of the joining element of the opposite pillar. However, this is difficult because the joining elements must be made to tolerances allowing no large backlash. Therefore, even a slight defect, a deformation caused by a bruise or a small foreign object caught on the joining elements may prevent locking of the joint. On the other hand, if larger clearances are provided between the joining elements, then the joint will not be sufficiently firm and rigid.
  • OBJECT OF THE INVENTION
  • The object of the present invention is to achieve a butt joint for pillars that does not have the above-described disadvantages.
  • FEATURES OF THE INVENTION
  • The joint of the invention for joining two objects, such as reinforced concrete pillars, is characterized in that the groove of the joining element of at least one of the objects to be joined is provided with a wedge-like part on which the spring-like locking element is wedged.
  • EMBODIMENTS OF THE JOINT OF THE INVENTION
  • A preferred embodiment of the joint of the invention is characterized in that the annular groove in the projecting part of the first joining element has a wedge-shaped cross-section so that at least one of the side walls of the groove forms an element, such as a conical surface, that produces a wedging effect on the spring-like locking element.
  • A second preferred embodiment of the joint of the invention is characterized in that the spring-like locking element is a severed annular spring having a rectangular cross-section.
  • A third preferred embodiment of the joint of the invention is characterized in that
    • the spring-like locking element is a severed annular spring having a wedge-shaped cross-section such that the conical wedge surface of the annular spring mainly corresponds to the conical surface of the annular spring of the joining element, and that
    • the conical wedge surface of the annular spring and the conical surface of the annular groove of the joining element are fitted against each other.
  • A fourth preferred embodiment of the joint of the invention is characterized in that the spring-like locking element is a severed annular spring of circular cross-section.
  • A fifth preferred embodiment of the joint of the invention is characterized in that
    • the first object to be joined is a reinforced concrete pillar with a joining element at its end consisting of a projecting part having a circular cross-section and provided with an annular groove, and
    • the second object to be joined is a rock shoe with a joining element consisting of a cavity of circular cross-section provided with an annular groove, and that
    • the joining elements of the reinforced concrete pillar and the rock shoe are locked together by means of an annular spring that is fitted into the annular grooves of the joining elements, at least one of said grooves having a wedge-like shape.
  • A further preferred embodiment of the joint of the invention is characterized in that the annular groove in the cavity has a wedge-shaped cross-section such that at least one of the side walls of the groove forms an element, such as a conical surface, that produces a wedging effect on the spring-like locking element.
  • EXAMPLES OF EMBODIMENTS
  • In the following, the invention will be described in detail by the aid of examples with reference to the attached drawings, wherein
  • LIST OF FIGURES
  • Fig. 1
    presents the ends of two reinforced concrete pillars and their mutually fitting joining elements in an axonometric view partially sectioned.
    Fig. 2
    presents the ends of two reinforced concrete pillars and their mutually fitting joining elements in vertical section.
    Fig. 3
    presents a joint between reinforced concrete pillars in vertical section.
    Fig. 4
    corresponds to Fig. 3 and presents a joint between reinforced concrete pillars according to a second embodiment.
    Fig. 5
    presents a diagrammatic vertical section of a joint between two objects according to a third embodiment.
    Fig. 6
    corresponds to Fig. 5 and presents a joint between two objects according to a fourth embodiment.
    Fig. 7
    presents a joint between a reinforced concrete pillar and a rock shoe in vertical section.
    Fig. 8
    corresponds to Fig. 3 and presents a joint between reinforced concrete pillars according to a fifth embodiment.
    DESCRIPTION OF THE FIGURES
  • Fig. 1 illustrates a situation where two reinforced concrete pillars 10a and 10b are being joined together end to end, with the pillar ends brought close to each other but still remaining apart. The principal material of the pillars 10a and 10b is concrete 11, in addition to which they also contain numerous steel reinforcements as is known in the art, which are not shown. Instead, Fig. 1 presents a detailed illustration of the structure of the joining elements 20a and 20b. Each joining element 20a and 20b comprises an end plate 21a and 21, an edge collar 22a and 22b welded on it and anchor bars 23a and 23b welded to the end plates 21a and 21.
  • The joining element 20a of the reinforced concrete pillar 10a shown above the other one in Fig. 1 comprises a cylindrical projecting part 30 welded to the end plate 21a and having an annular groove 31 in the outer surface of its cylinder barrel. The inner end of the cylinder 30 is closed by a bottom plate 32. Similarly, the joining element 20b of the reinforced concrete pillar 10b shown below the other one in Fig. 1 comprises a cylindrical cavity 40 welded to the end plate 21b and having an annular groove 41 in the inner surface of its cylinder barrel. This cylinder 40, too, is provided with a bottom plate 42. The extremity of the cylindrical projecting part 30 is shaped as a conical surface 33, which, when the reinforced concrete pillars 10a and 10b are being joined together, causes the severed annular spring 50 in the groove 31 of the cavity 40 to open until the spring falls into the groove 31 of the projecting part 30, locking the joint between the joining elements 20a and 20b and therefore the joint between the reinforced concrete pillars 10a and 10b.
  • From Fig. 1 it can be seen that it is possible to add a suitable number of reinforcing rods to the circumference of the joining elements 20a and 20b in accordance with the strength requirements regarding the joint between the reinforced concrete pillars 10a and 10b.
  • Fig. 2 presents the structure of the joining elements 20a and 20b of reinforced concrete pillars 10a and 10b in vertical section. The projecting cylindrical part 30 attached to the end plate 21a of the upper pillar 10a has a conical end 33 and an annular groove 31. It can be seen from the figure that one 34 of the side walls of the annular groove 31 is inclined, forming an angle α with a plane perpendicular to the longitudinal axis of the cylinder 30. Since the projection 30 is a round cylinder, the inclined wall 34 forms a conical surface. The angle α preferably has a magnitude of only a few degrees. An inclination of e.g. 5-10° is sufficient to cause the annular spring 50 to be wedged against this surface, locking the joining elements 21a and 21b tightly together. On the other hand, the cylinder 40 of the joining element 20b of the lower pillar 10b is provided with an internal annular groove 41 of rectangular cross-section, with a severed annular spring 50 of rectangular cross-section placed in the groove.
  • In Fig. 2, the letters a and b indicate the distances from the edges of the annular grooves 31 and 41 to the stop faces of the reinforced concrete pillars 10a and 10b to be placed against each other. In manufacture, these measurements are essential to flawless functioning of the joining elements 20a and 20b. To allow the annular spring 50 to be effectively locked against the conical surface 34, measurement a must be smaller than or equal to measurement b.
  • Fig. 3 shows the reinforced concrete pillars 10a and 10b of Fig. 2 joined together, with the annular spring 50 latched in the groove 31 of the projecting part 30 of the joining element of the upper reinforced concrete pillar 10a. Since the annular spring 50 was expanded by the conical surface 33 of the projecting part 30 during the insertion movement, in the locked state of the joint the annular spring 50 is still exerting compression. Thus, the annular spring 50 is wedged against the conical surface 34 of the groove 31. When the pillar thus extended is jolted by impacts applied to the end of the upper pillar, each impact will cause the annular spring 50 to be more and more tightly wedged against the conical surface 34, a very firm joint being thus formed.
  • Fig. 4 presents an embodiment in which a more effective wedging of the annular spring 50 as the conical surface 34 is additionally ensured by using screws 51a and 51b that press the annular spring towards the bottom of the groove 31.
  • Fig. 5 presents a diagrammatic vertical section of a joint connecting two objects, in which the cylindrical projecting part 30 has been pressed into the cylindrical cavity of the other object. In this embodiment, both the groove 31 of the cylindrical projecting part 30 and the annular spring 50 have a wedge-shaped cross-section, i.e. both have conical surfaces, which are placed against each other. In this case, the annular spring 50 is wedged still more effectively into the groove 31, interlocking the projecting part 30 and the cavity 40 of the joining elements.
  • Fig. 6 presents an alternative annular spring 50, according to which the annular spring 50 has a circular cross-section.
  • Fig. 7 presents a joint between a reinforced concrete pillar 10 and a rock shoe 60 in vertical section. The structure of this joint fully corresponds to the above-described joint between two pillars. Thus, a rock shoe 60 as shown here can be joined to the end of any pillar. In the rock shoe 60, an actual shoe part 61 is fastened with a screw 62 to a frame part 63, which corresponds to the cylinder 40 of the joining element 20b at the end of a pillar 10b. This frame cylinder 63 has inside it a corresponding cavity and an annular groove 65 for an annular spring 50. The frame cylinder 63 is attached to an end plate 64, which meets the end plate 21 of the pillar.
  • Fig. 8 presents an alternative joint between reinforced concrete pillars 10a and 10b, where, before the joining, the annular spring 50 is placed in the groove 31 of rectangular cross-section of the projecting part 30. In this case, the mouth of the cavity 40 has a conical shape 43 that compresses the annular spring 50 as the pillars are being joined together. Once the projecting part 30 has been inserted all the way down into the cavity, the annular spring 50 will expand into the groove 41 in the cavity 40 and get wedged against the conical surface 44. As compared with the above-described other embodiments, the operation of the annular spring 50 is thus reversed. In this case, too, to allow the joint to be further tightened during impacts applied to the pillar, the inclined surface 44 of the groove 41 in the cavity 40 must be located on the opposite side.
  • ADDITIONAL REMARKS
  • It is obvious to the person skilled in the art that different embodiments of the invention may vary within the scope of the claims presented below.
  • REFERENCE NUMBERS
  • 10
    reinforced concrete pillar
    11
    concrete
    20
    joining element
    21
    end plate
    22
    edge collar
    23
    anchor bars
    30
    projecting part
    31
    groove
    32
    bottom
    33
    conical end surface
    34
    conical wedge surface of groove
    35
    stop face
    40
    cavity
    41
    groove
    42
    bottom
    43
    cone
    44
    wedge
    45
    stop face
    50
    annular spring
    51
    screw
    52
    conical wedge surface of annular spring
    60
    rock shoe
    61
    shoe part
    62
    screw
    63
    cylinder
    64
    end plate
    65
    groove

Claims (7)

  1. Joint between two objects (10, 60) to be joined together, such as pillars, said joint comprising
    a first connecting element (20a) at the end of a first object (10a) to be joined, such as a pillar, consisting of a projecting part (30), preferably a spigot having a circular cross-section and provided with an annular groove (31),
    a second connecting element (20b) at the end of a second object (10b, 60) to be joined, such as a pillar or equivalent, said connecting element consisting of a cavity, preferably a dead hole having a circular cross-section and provided with an annular groove (41, 65),
    a spring-like locking element (50), preferably an annular spring or a part of one, which locks the groove (31) of the first connecting element (21a) to the groove (41, 65) of the second connecting element (21b),
    characterized in that
    the groove (31, 41) of the joining element (20a, 20b) of at least one of the objects (10a, 10b) to be joined is provided with a wedge-like part (34, 44) on which the spring-like locking element (50) is wedged.
  2. Joint according to claim 1, characterized in that the annular groove (31) in the projecting part (30) of the first joining element (10a) has a wedge-shaped cross-section such that at least one (34) of the side walls of the groove forms an element, such as a conical surface, that produces a wedging effect on the spring-like locking element (50).
  3. Joint according to claim 1 or 2, characterized in that the spring-like locking element (50) is a severed annular spring having a rectangular cross-section.
  4. Joint according to claim 1,2 or 3, characterized in that
    the spring-like locking element (50) is a severed annular spring having a wedge-shaped cross-section such that the conical wedge surface (52) of the annular spring mainly corresponds to the conical surface of the annular spring (31) of the joining element (30), and that
    the conical wedge surface (52) of the annular spring (50) and the conical surface (34) of the annular groove (31) of the joining element (30) are fitted against each other.
  5. Joint according to any one of claims 1-4, characterized in that the spring-like locking element (50) is a severed annular spring of circular cross-section.
  6. Joint according to any one of claims 1-5, characterized in that
    the first object (10) to be joined is a reinforced concrete pillar with a joining element at its end consisting of a projecting part (30) having a circular cross-section and provided with an annular groove (31), and
    the second object (60) to be joined is a rock shoe with a joining element consisting of a cavity (63) of circular cross-section provided with an annular groove (65), and that
    the joining elements (30, 63) of the reinforced concrete pillar (10) and the rock shoe (60) are locked together by means of an annular spring (50) fitted into the annular grooves (31, 65) of the joining elements, at least one of said grooves having a wedge-like shape.
  7. Joint according to any one of claims 1-6, characterized in that the annular groove (41) in the cavity (40) of the joining element (20b) has a wedge-shaped cross-section such that at least one (44) of the side walls of the groove forms an element, such as a conical surface, that produces a wedging effect on the spring-like locking element (50).
EP02396128A 2001-08-28 2002-08-26 A joint for reinforced concrete pile sections Expired - Lifetime EP1288382B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FI20011721 2001-08-28
FI20011721A FI116474B (en) 2001-08-28 2001-08-28 Connection of pieces such as reinforced concrete piles

Publications (3)

Publication Number Publication Date
EP1288382A2 true EP1288382A2 (en) 2003-03-05
EP1288382A3 EP1288382A3 (en) 2004-01-14
EP1288382B1 EP1288382B1 (en) 2006-07-19

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EP02396128A Expired - Lifetime EP1288382B1 (en) 2001-08-28 2002-08-26 A joint for reinforced concrete pile sections

Country Status (4)

Country Link
EP (1) EP1288382B1 (en)
AT (1) ATE333539T1 (en)
DE (1) DE60213168D1 (en)
FI (1) FI116474B (en)

Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100348803C (en) * 2004-11-16 2007-11-14 周兆弟 Pile connecting buckle and its prefabricated unit
US20090263189A9 (en) * 2007-04-13 2009-10-22 Kari Koivunen Joint for reinforced concrete pile sections
GB2463946A (en) * 2008-10-04 2010-04-07 Roxbury Patents Ltd Improvements in or relating to piles and pile joints
CN103386709A (en) * 2013-07-25 2013-11-13 明业建设集团有限公司 Shakeproof lift-preventing anti-bending preformed pile and manufacturing process of preformed pile
CN103882863A (en) * 2014-03-04 2014-06-25 姚瑜 Tubular pile end-plate-free and pulling resistant functional assembly
CN104989715A (en) * 2015-06-25 2015-10-21 周兆弟 Integrated nut for connecting piece
CN104989716A (en) * 2015-06-25 2015-10-21 周兆弟 Connecting nut for connecting piece
CN105114425A (en) * 2015-09-01 2015-12-02 许顺良 U-shaped bolt connecting mechanism for connecting piles
WO2016054187A1 (en) * 2014-09-30 2016-04-07 Miller Philip Glen Self-bracing, two-way moment frame precast system for industrial support structure and method of utilizing same
CN106337858A (en) * 2016-10-19 2017-01-18 周兆弟 Connecting piece provided with rotatable intermediate nut
CN105179398B (en) * 2015-10-09 2017-10-10 周兆弟 Flexible clamping formula connector
CN107882023A (en) * 2017-09-14 2018-04-06 江苏麦廊新材料科技有限公司 Resistance to plucking bending resistance quick union and concrete precast pile
CN108506591A (en) * 2018-04-28 2018-09-07 安徽砼宇特构科技有限公司 A kind of concrete plug equipped with Hermetical connecting structure
CN111101508A (en) * 2019-12-30 2020-05-05 嘉兴欣创混凝土制品有限公司 Quick butt joint subassembly and quick butt joint mechanism
CN112124203A (en) * 2020-09-03 2020-12-25 广州汽车集团股份有限公司 Spare outside rear-view mirror structure of car
CN112554181A (en) * 2020-11-30 2021-03-26 王玉中 Precast concrete tubular pile
CN112695746A (en) * 2020-12-28 2021-04-23 台州建筑安装工程公司 Combined concrete pipe pile for building construction

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101979778B (en) * 2010-10-07 2012-06-13 周兆弟 Method for butting concrete prefabricated member consisting of prefabricated member connector
CN109083140B (en) * 2018-09-07 2023-12-05 袁雪峰 Precast concrete anti-floating pile connection structure
CN109083139B (en) * 2018-09-07 2023-12-05 袁雪峰 Anti-pulling pile connecting structure
CN110056083B (en) * 2019-04-16 2020-04-10 武汉大学 Self-locking type FRP (fiber reinforced plastic) section beam column joint capable of being quickly assembled

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GB588478A (en) * 1945-02-21 1947-05-22 Carr Fastener Co Ltd Improved means for detachably securing rigid panels to supports
GB2029920A (en) * 1978-09-06 1980-03-26 Marier G W End connection of concrete posts or piles
CA1109303A (en) * 1978-11-30 1981-09-22 Jacques Brossard Method of anchoring a fastener to a base and anchoring bolt for use in same
WO1997038173A1 (en) * 1996-04-09 1997-10-16 Leimet Oy Clampjoint for concrete piles

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Publication number Priority date Publication date Assignee Title
GB588478A (en) * 1945-02-21 1947-05-22 Carr Fastener Co Ltd Improved means for detachably securing rigid panels to supports
GB2029920A (en) * 1978-09-06 1980-03-26 Marier G W End connection of concrete posts or piles
CA1109303A (en) * 1978-11-30 1981-09-22 Jacques Brossard Method of anchoring a fastener to a base and anchoring bolt for use in same
WO1997038173A1 (en) * 1996-04-09 1997-10-16 Leimet Oy Clampjoint for concrete piles

Cited By (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100348803C (en) * 2004-11-16 2007-11-14 周兆弟 Pile connecting buckle and its prefabricated unit
US9339944B2 (en) * 2007-04-13 2016-05-17 Smrf, Llc Casting guide for reinforced concrete pile sections
US20090263189A9 (en) * 2007-04-13 2009-10-22 Kari Koivunen Joint for reinforced concrete pile sections
GB2463946A (en) * 2008-10-04 2010-04-07 Roxbury Patents Ltd Improvements in or relating to piles and pile joints
CN103386709A (en) * 2013-07-25 2013-11-13 明业建设集团有限公司 Shakeproof lift-preventing anti-bending preformed pile and manufacturing process of preformed pile
CN103882863A (en) * 2014-03-04 2014-06-25 姚瑜 Tubular pile end-plate-free and pulling resistant functional assembly
US11162256B1 (en) 2014-09-30 2021-11-02 Philip Glen Miller Self-bracing, two-way moment frame precast system for industrial support structure and method of utilizing same
US10738463B2 (en) 2014-09-30 2020-08-11 Philip Glen Miller Self-bracing, two-way moment frame precast system for industrial support structure and method of utilizing same
WO2016054187A1 (en) * 2014-09-30 2016-04-07 Miller Philip Glen Self-bracing, two-way moment frame precast system for industrial support structure and method of utilizing same
CN104989715A (en) * 2015-06-25 2015-10-21 周兆弟 Integrated nut for connecting piece
CN104989716A (en) * 2015-06-25 2015-10-21 周兆弟 Connecting nut for connecting piece
CN105114425A (en) * 2015-09-01 2015-12-02 许顺良 U-shaped bolt connecting mechanism for connecting piles
CN105179398B (en) * 2015-10-09 2017-10-10 周兆弟 Flexible clamping formula connector
CN106337858A (en) * 2016-10-19 2017-01-18 周兆弟 Connecting piece provided with rotatable intermediate nut
CN107882023A (en) * 2017-09-14 2018-04-06 江苏麦廊新材料科技有限公司 Resistance to plucking bending resistance quick union and concrete precast pile
CN108506591A (en) * 2018-04-28 2018-09-07 安徽砼宇特构科技有限公司 A kind of concrete plug equipped with Hermetical connecting structure
CN111101508A (en) * 2019-12-30 2020-05-05 嘉兴欣创混凝土制品有限公司 Quick butt joint subassembly and quick butt joint mechanism
CN112124203A (en) * 2020-09-03 2020-12-25 广州汽车集团股份有限公司 Spare outside rear-view mirror structure of car
CN112554181A (en) * 2020-11-30 2021-03-26 王玉中 Precast concrete tubular pile
CN112554181B (en) * 2020-11-30 2022-09-23 宁波津和建材科技发展有限公司 Precast concrete tubular pile
CN112695746A (en) * 2020-12-28 2021-04-23 台州建筑安装工程公司 Combined concrete pipe pile for building construction

Also Published As

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ATE333539T1 (en) 2006-08-15
EP1288382A3 (en) 2004-01-14
DE60213168D1 (en) 2006-08-31
FI116474B (en) 2005-11-30
FI20011721A0 (en) 2001-08-28
EP1288382B1 (en) 2006-07-19
FI20011721A (en) 2003-03-01

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