EP1288382B1 - A joint for reinforced concrete pile sections - Google Patents
A joint for reinforced concrete pile sections Download PDFInfo
- Publication number
- EP1288382B1 EP1288382B1 EP02396128A EP02396128A EP1288382B1 EP 1288382 B1 EP1288382 B1 EP 1288382B1 EP 02396128 A EP02396128 A EP 02396128A EP 02396128 A EP02396128 A EP 02396128A EP 1288382 B1 EP1288382 B1 EP 1288382B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- spring
- groove
- annular
- joint
- section
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 239000011150 reinforced concrete Substances 0.000 title claims abstract description 30
- 239000011435 rock Substances 0.000 claims description 8
- 230000000694 effects Effects 0.000 claims description 4
- 210000001503 joint Anatomy 0.000 description 9
- 239000004567 concrete Substances 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- 238000003780 insertion Methods 0.000 description 2
- 230000037431 insertion Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 208000034656 Contusions Diseases 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000004873 anchoring Methods 0.000 description 1
- 208000034526 bruise Diseases 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/18—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons
- E04B1/20—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons the supporting parts consisting of concrete, e.g. reinforced concrete, or other stonelike material
- E04B1/21—Connections specially adapted therefor
- E04B1/215—Connections specially adapted therefor comprising metallic plates or parts
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/22—Piles
- E02D5/52—Piles composed of separable parts, e.g. telescopic tubes ; Piles composed of segments
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/18—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons
- E04B1/20—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons the supporting parts consisting of concrete, e.g. reinforced concrete, or other stonelike material
- E04B1/21—Connections 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 document WO 97 38173 A describes a joint for joining concrete piles provided with two clamp joints in the corners of the piles.
- the clamp joints are locked by means of pins, which are pushed from side through the channels.
- the pins turn around the locking bars forming toroids because of plastical deformation.
- the opposite surfaces are parallel. However, in the longitudinal direction the opposite surfaces can be slightly sphenoid so that the wedge-sized property extends evenly along the entire length of the insert pin.
- the document CA-A-1 109 303 describes an anchoring bolt to be secured to a building structure.
- the bolt In the bolt there is a conical surface bevelled at approximately 45° and an expansion ring made of malleable material around the conical surface.
- the bolt is anchored to a pre-drilled hole by adapting axial force to the conical surface by using a thread and a nut at the outer end of the bolt. In consequence the ring will expand and press against the walls of the hole.
- the mechanism is not suitable for a joint between two pieces, as described in the invention.
- the document GB 588 478 A describes a stud and socket fastener for attaching two panels together.
- a spring ring In the fastener there is a spring ring, which is locked to a stud member.
- the document GB-A-2 029 920 describes a joint for joining concrete pillars end to end. At the ends of the pillars there are circular grooves, which together form a locking channel. The locking of the pillars is achieved by positioning a locking rod into the locking channel.
- 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 by the characterizing features of appended claim 1.
- 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 21 a 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 21 b 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
Description
- 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, such as 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, such as a dead hole having a circular cross-section and provided with an annular groove,
- a spring-like locking element, such as 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.
- 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.
- The document WO 97 38173 A describes a joint for joining concrete piles provided with two clamp joints in the corners of the piles. The clamp joints are locked by means of pins, which are pushed from side through the channels. The pins turn around the locking bars forming toroids because of plastical deformation. In the direction of the toroid diameter the opposite surfaces are parallel. However, in the longitudinal direction the opposite surfaces can be slightly sphenoid so that the wedge-sized property extends evenly along the entire length of the insert pin.
- The document CA-A-1 109 303 describes an anchoring bolt to be secured to a building structure. In the bolt there is a conical surface bevelled at approximately 45° and an expansion ring made of malleable material around the conical surface. The bolt is anchored to a pre-drilled hole by adapting axial force to the conical surface by using a thread and a nut at the outer end of the bolt. In consequence the ring will expand and press against the walls of the hole. The mechanism is not suitable for a joint between two pieces, as described in the invention.
- The document GB 588 478 A describes a stud and socket fastener for attaching two panels together. In the fastener there is a spring ring, which is locked to a stud member.
- The document GB-A-2 029 920 describes a joint for joining concrete pillars end to end. At the ends of the pillars there are circular grooves, which together form a locking channel. The locking of the pillars is achieved by positioning a locking rod into the locking channel.
- 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.
- 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, such as reinforced concrete pillars, is characterized by the characterizing features of appended
claim 1. - 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 groove 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.
- In the following, the invention will be described in detail by the aid of examples with reference to the attached drawings, wherein
-
- 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.
- Fig. 1 illustrates a situation where two reinforced
concrete pillars pillars elements element end plate edge collar 22a and 22b welded on it andanchor bars 23a and 23b welded to theend plates - The joining
element 20a of the reinforcedconcrete pillar 10a shown above the other one in Fig. 1 comprises a cylindrical projectingpart 30 welded to theend plate 21 a and having anannular groove 31 in the outer surface of its cylinder barrel. The inner end of thecylinder 30 is closed by abottom plate 32. Similarly, the joiningelement 20b of the reinforcedconcrete pillar 10b shown below the other one in Fig. 1 comprises acylindrical cavity 40 welded to theend plate 21 b and having anannular groove 41 in the inner surface of its cylinder barrel. Thiscylinder 40, too, is provided with abottom plate 42. The extremity of the cylindrical projectingpart 30 is shaped as aconical surface 33, which, when the reinforcedconcrete pillars annular spring 50 in thegroove 31 of thecavity 40 to open until the spring falls into thegroove 31 of the projectingpart 30, locking the joint between the joiningelements concrete pillars - 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 concrete pillars - Fig. 2 presents the structure of the joining
elements concrete pillars cylindrical part 30 attached to theend plate 21a of theupper pillar 10a has aconical end 33 and anannular groove 31. It can be seen from the figure that one 34 of the side walls of theannular groove 31 is inclined, forming an angle α with a plane perpendicular to the longitudinal axis of thecylinder 30. Since theprojection 30 is a round cylinder, theinclined 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 theannular spring 50 to be wedged against this surface, locking the joiningelements cylinder 40 of the joiningelement 20b of thelower pillar 10b is provided with an internalannular groove 41 of rectangular cross-section, with a severedannular 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 concrete pillars elements annular spring 50 to be effectively locked against theconical surface 34, measurement a must be smaller than or equal to measurement b. - Fig. 3 shows the reinforced
concrete pillars annular spring 50 latched in thegroove 31 of the projectingpart 30 of the joining element of the upper reinforcedconcrete pillar 10a. Since theannular spring 50 was expanded by theconical surface 33 of the projectingpart 30 during the insertion movement, in the locked state of the joint theannular spring 50 is still exerting compression. Thus, theannular spring 50 is wedged against theconical surface 34 of thegroove 31. When the pillar thus extended is jolted by impacts applied to the end of the upper pillar, each impact will cause theannular spring 50 to be more and more tightly wedged against theconical 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 theconical surface 34 is additionally ensured by using screws 51a and 51b that press the annular spring towards the bottom of thegroove 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 thegroove 31 of the cylindrical projectingpart 30 and theannular spring 50 have a wedge-shaped cross-section, i.e. both have conical surfaces, which are placed against each other. In this case, theannular spring 50 is wedged still more effectively into thegroove 31, interlocking the projectingpart 30 and thecavity 40 of the joining elements. - Fig. 6 presents an alternative
annular spring 50, according to which theannular spring 50 has a circular cross-section. - Fig. 7 presents a joint between a reinforced
concrete pillar 10 and arock shoe 60 in vertical section. The structure of this joint fully corresponds to the above-described joint between two pillars. Thus, arock shoe 60 as shown here can be joined to the end of any pillar. In therock shoe 60, anactual shoe part 61 is fastened with ascrew 62 to aframe part 63, which corresponds to thecylinder 40 of the joiningelement 20b at the end of apillar 10b. Thisframe cylinder 63 has inside it a corresponding cavity and anannular groove 65 for anannular spring 50. Theframe cylinder 63 is attached to anend plate 64, which meets theend plate 21 of the pillar. - Fig. 8 presents an alternative joint between reinforced
concrete pillars annular spring 50 is placed in thegroove 31 of rectangular cross-section of the projectingpart 30. In this case, the mouth of thecavity 40 has aconical shape 43 that compresses theannular spring 50 as the pillars are being joined together. Once the projectingpart 30 has been inserted all the way down into the cavity, theannular spring 50 will expand into thegroove 41 in thecavity 40 and get wedged against the conical surface 44. As compared with the above-described other embodiments, the operation of theannular 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 thegroove 41 in thecavity 40 must be located on the opposite side. - 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.
Claims (7)
- 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), such as 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 second connecting element consisting of a cavity, such as a dead hole, having a circular cross-section and provided with an annular groove (41, 65),- a spring-like locking element (50), such as 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- in the connecting elements (20a, 20b) the groove (31) of the first connecting element (20a) and/or the groove (41) of the second connecting element (20b) is wedge-shaped in the cross-section; or both the groove of the cylindrical projecting part (30) and the spring-like locking element (50) is wedge-shaped in the cross-section such that the conical wedge surface of the spring-like locking element (50) mainly corresponds to the conical surface of the annular groove (31) of the projecting part (30); so that impacts applied to the end of the second object to be joined (10b, 60) will cause the annular spring to be more and more tightly wedged into the groove.
- 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).
- 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.
- Joint according to claim 1, or 2, 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 groove (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.
- Joint according to any one of claims 1 or 2, characterized in that the spring-like locking element (50) is a severed annular spring of circular cross-section.
- Joint according to any one of claims 1-5, characterized in that- the first object (10) to be joined is a reinforced concrete pillar and- the second object (60) to be joined is a rock shoe and that- the connecting elements (20a, 20b) of the reinforced concrete pillar (10) and the rock shoe (60) are locked together by means of the spring-like looking element which is an annular spring (50) fitted into the annular grooves (31, 65) of the connecting elements, at least one of said grooves having a wedge-like shape.
- Joint according to any one of claims 1-6, characterized in that the annular groove (41) in the cavity (40) of the second connecting 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).
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FI20011721A FI116474B (en) | 2001-08-28 | 2001-08-28 | Connection of pieces such as reinforced concrete piles |
FI20011721 | 2001-08-28 |
Publications (3)
Publication Number | Publication Date |
---|---|
EP1288382A2 EP1288382A2 (en) | 2003-03-05 |
EP1288382A3 EP1288382A3 (en) | 2004-01-14 |
EP1288382B1 true EP1288382B1 (en) | 2006-07-19 |
Family
ID=8561807
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
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) |
Families Citing this family (21)
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 |
CN101979778B (en) * | 2010-10-07 | 2012-06-13 | 周兆弟 | Method for butting concrete prefabricated member consisting of prefabricated member connector |
CN103386709B (en) * | 2013-07-25 | 2015-07-29 | 明业建设集团有限公司 | A kind of shockproof resistance to plucking bending resistance prefabricated pile and prefabricated pile manufacture craft |
CN103882863B (en) * | 2014-03-04 | 2015-09-09 | 姚瑜 | A kind of pile tube is exempted from end plate and to be held concurrently resistance to plucking functional unit |
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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 |
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Family Cites Families (4)
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 |
FI961552A0 (en) * | 1996-04-09 | 1996-04-09 | Leimet Oy | Laosfog Foer betongpaolar |
-
2001
- 2001-08-28 FI FI20011721A patent/FI116474B/en not_active IP Right Cessation
-
2002
- 2002-08-26 DE DE60213168T patent/DE60213168D1/en not_active Expired - Lifetime
- 2002-08-26 AT AT02396128T patent/ATE333539T1/en not_active IP Right Cessation
- 2002-08-26 EP EP02396128A patent/EP1288382B1/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
EP1288382A2 (en) | 2003-03-05 |
DE60213168D1 (en) | 2006-08-31 |
FI20011721A (en) | 2003-03-01 |
ATE333539T1 (en) | 2006-08-15 |
EP1288382A3 (en) | 2004-01-14 |
FI20011721A0 (en) | 2001-08-28 |
FI116474B (en) | 2005-11-30 |
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