The present invention relates to a contactless coupler capable of securing workability and efficiency in precast structure construction by allowing connecting rebars drawn from block-out spaces (S) of precast structures to be connected to each other in a contactless manner without direction connection using a coupler when connecting the connecting rebars to each other, a precast structure manufactured using the same, and a construction method thereof, the contactless coupler includes the connecting rebars drawn from the communicating block-out spaces (S) of the precast structures adjacent to each other, respectively and a plurality of contactless ring connection members disposed to be spaced apart around the connecting rebars that are adjacent and separated from each other and fill the block-out spaces (S) while surrounding the connecting rebars, and the connecting rebars adjacent to each other are connected to each other without the coupler by a frictional force generated by the contactless ring connection members being buried in a finishing grout with which the block-out spaces (S) are filled.
Legal claims defining the scope of protection, as filed with the USPTO.
. A contactless coupler comprising:
. The contactless coupler of, wherein the contactless ring connection member () includes a plurality of circular rings disposed to be spaced apart around the connecting rebars () and further formed with protrusions so that a contact area with the finishing grout () is increased.
. The contactless coupler of, further comprising a rib connector () including both horizontal channel bodies () in which a plurality of joint grooves () are formed so that left and right side surfaces of the contactless ring connection members () set around both connecting rebars () are insertable and configured to secure connection performance at a connection joint surface of the precast structure () by a frictional force by being installed through the block-out spaces (S) adjacent to and communicating with each other and then buried in the finishing grout ().
. The contactless coupler of, wherein a rebar head () is further installed on the connecting rebar () so that the contactless ring connection members () are installed around the connecting rebar () on which the rebar head () is installed, and the connecting rebars () adjacent to each other are connected to each other without a coupler by a frictional force generated by the rebar head () being buried in the finishing grout () with which the block-out spaces (S) are filled.
. The contactless coupler of, wherein the rebar head () includes: an enlarged body portion () that is separated and installed to surround an outer peripheral surface of the connecting rebar (); end fixing portions () formed integrally in a ring shape at both side ends of the enlarged body portion () and installed on an upper surface to be in contact with an end fixing device (); and an enlarged node connection portion () in which an enlarged node portion () is detachably formed as a fastener formed on an outer peripheral surface between the end fixing portions () on both sides of the enlarged body portion ().
. The contactless coupler of, wherein on an inner surface of the enlarged body portion (), an inner groove () in which a node and a rib of the connecting rebar () are accommodated is further formed at a region where the enlarged body portion () and the connecting rebar () are in contact with each other, and the inner groove () is filled with metal melted by welding, and
. The contactless coupler of, wherein the enlarged node connection portion () has concave portions and convex portions continuously formed as a fastener at a region in which the enlarged node connection portion is in contact with the finishing grout () so that an adhesive force is securable, and the enlarged node portion () is installed on the enlarged node connection portion () that is the fastener to expand an attachment area so that the adhesive force is improved and acupressure performance is also adjustable depending on a direction.
. The contactless coupler of, wherein the enlarged node portion () is installed in a ring shape in which a threaded portion is formed on an inner surface fastened to the enlarged node connection portion () to be detachable and the enlarged node body () is installed in a form perpendicular to the connecting rebar () so that the acupressure performance is securable.
. The contactless coupler of, wherein the end fixing device () is fixed to the connecting rebar () by compressing, the end fixing device () is fastened to the fastener formed on the end fixing portion () by screw fastening, and the rebar head () is attached to the connecting rebar () by pressing by compressing and fixing the enlarged node body () to the connecting rebar () as the end fixing device () is rotated on the connecting rebar ().
. The contactless coupler of, wherein on the inner surface of the enlarged body portion (), the enlarged body portion () and the connecting rebar () are formed so that a node and a rib of the connecting rebar () are in direct contact and the enlarged body portion () is compressed to a final connecting rebar () as a compressible material, and
. A precast structure manufactured using a contactless coupler including connecting rebars drawn from block-out spaces (S) adjacent to and communicating with each other, respectively, comprising a plurality of contactless ring connection members disposed to be spaced apart around the connecting rebars that are adjacent and separated from each other and fill the block-out spaces (S) while surrounding the connecting rebars,
. The precast structure of, wherein a rebar head () is further installed on the connecting rebar () so that the contactless ring connection members () are installed around the connecting rebar () on which the rebar head () is installed, and the connecting rebars () adjacent to each other are connected to each other without a coupler by a frictional force generated by the rebar head () being buried in the finishing grout () with which the block-out spaces (S) are filled.
. A method of constructing a precast structure manufactured using a contactless coupler, comprising:
. The method of, further comprising, after the step (b), (c) a step of connecting the connecting rebars () adjacent to each other without a coupler by a frictional force generated by the contactless ring connection members () and the rib connector () being buried in a finishing grout () with which the block-out spaces (S) are filled.
. The method of, wherein a rebar head () is further installed on the connecting rebar () in the step (a) so that the contactless ring connection members () are installed around the connecting rebar () on which the rebar head () is installed, the connecting rebars () adjacent to each other are connected to each other without a coupler by a frictional force generated by the rebar head () being buried in a finishing grout () with which the block-out spaces (S) are filled, and the rebar head () includes an enlarged body portion () that is separated and installed to surround an outer peripheral surface of the connecting rebar (), end fixing portions () formed integrally in a ring shape at both side ends of the enlarged body portion () and installed on an upper surface to be in contact with an end fixing device (), and an enlarged node connection portion () in which an enlarged node portion () is detachably formed as a fastener formed on an outer peripheral surface between the end fixing portions () on both sides of the enlarged body portion ().
. The method of, wherein the precast structure () in the step (a) includes a culvert, an underground tunnel, and an above-ground tunnel as a steel concrete member manufactured in advance using a formwork, and the separate connecting rebars () are connected to each other without a coupler by the contactless coupler () even when the connecting rebars are not on the same central axis.
Complete technical specification and implementation details from the patent document.
The present invention relates to a contactless coupler and a precast structure manufactured using the same. More specifically, the present invention relates to a contactless coupler capable of sufficiently securing workability and efficiency in precast structure construction by allowing connecting rebars drawn from block-out spaces (S) of precast structures to be connected to each other in a contactless manner without direct connection using a coupler when connecting the connecting rebars to each other, a precast structure manufactured using the same, and a construction method thereof.
shows an exemplary view of coupler construction of precast members PCand PCin the related art.
That is, the precast members PCand PCare constructed by being separately manufactured and connected, and for the connection construction, it can be seen that connecting rebars CRand CRdrawn from the precast members in block-out parts exposed to the outside are connected to each other using couplersand.
That is, the connection is made in a manner of directly fastening connecting rebars ETand ETusing the couplersandby fastening the female couplerto the connecting rebar of one precast member PC, fastening the male couplerto the connecting rebar of the other precast member PC, and inserting and fastening the male couplerinto the female coupler.
Accordingly, since couplersandare connected to the connecting rebars ETand ETin a manner of rotating and fastening threaded portions, bolts, and nuts, a bolt and nut fastening work is repeated, and thus a problem of having to sacrifice some of the workability and constructability occurs. In addition, when the connecting rebars ETand ETare not located on the same central axis due to manufacturing or construction errors of the precast members PCand PC, in some cases, it is not possible to insert and fasten the male couplerinto the female coupler, and since the couplersandare very expensive, there is a limit to securing economic efficiency.
shows an exemplary view of connection construction using an enlarged headof a concrete member in the related art.
The concrete member may be manufactured as a precast member but may also be constructed by pouring and curing cast-in-place concrete using formwork.
Accordingly, it can be seen that before pouring cast-in-place concrete on two adjacent concrete members, the connecting rebarsmay be set in an X-shape, and the concrete members may be connected to each other by pouring cast-in-place concrete.
In this case, it can be seen that an enlarged headmay be formed at a split endof the connecting rebarto surround the end, thereby increasing the anchoring performance of the end of the connecting rebar.
That is, the connecting rebaris used as a deformed rebar, but it can be seen that, in order to increase friction while increasing a contact area with concrete, a ring-shaped enlarged headmay be integrated in advance with the endof the connecting rebar.
shows an exemplary view of a fixing device for tendons that installs tendons in the concrete member (girder or the like) in the related art and mounts the tendons to the concrete member.
Tendons are used to introduce prestress into concrete members, and the tendons are usually made of PC steel strands so that the prestress is introduced through a reaction force caused by anchoring after tension.
Accordingly, an anchoring deviceis used to anchor the tendons to the concrete member,
The anchoring devicehas a basic structure including an anchoring plateand an anchor head, and
In this case, a large number of tendonsare usually installed, and are installed inside a sheathwhen installed using a post-tension method.
In the anchoring process, since significant local stress is concentrated on the concrete memberwhen the anchoring platecomes into contact with the concrete member, it can be seen that a reinforcing rebaris formed integrally with the anchor headinside the concrete member.
Accordingly, it can be seen that in order to connect the precast concrete members (precast members) to each other, in the related art, a method of simply connecting a connecting rebar directly using a coupler and then finishing the connecting with finishing grouting may be used, and it can be seen that in order to secure the anchorage performance of the connecting rebar, a large number of enlarged heads may be formed to be spaced apart on the connecting rebar,
Accordingly, the present invention is directed to providing a contactless coupler capable of securing sufficient anchoring performance required for connection while allowing connecting rebars to be connected to each other in a contactless manner in order to connect the precast structures to each other in externally exposed spaces (block-out spaces (S)), rather than a manner of mechanically connecting the connecting rebars by directly contacting the connecting rebars like a coupler in the related art, and a precast structure manufactured using the same.
In addition, the present invention is directed to providing a contactless coupler capable of securing workability and constructability while effectively resisting shear and separation forces at a connection joint surface by enhancing a binding force by wrapping connecting rebars in connecting rebars to each other in a contactless manner, thereby allowing quick and economical connection work of precast structures, and a precast structure manufactured using the same.
A contactless coupler of the present invention to achieve the above problem includes connecting rebars drawn from communicating block-out spaces (S) of precast structures adjacent to each other, respectively and a plurality of contactless ring connection members disposed to be spaced apart around the connecting rebars that are adjacent and separated from each other and fill the block-out spaces (S) while surrounding the connecting rebars, in which the connecting rebars adjacent to each other are connected to each other without a coupler by a frictional force generated by the contactless ring connection members being buried in a finishing grout with which the block-out spaces (S) are filled.
Also, a precast structure manufactured using a contactless coupler of the present invention including connecting rebars drawn from block-out spaces (S) adjacent to and communicating with each other includes a plurality of contactless ring connection members disposed to be spaced apart around the connecting rebars that are adjacent and separated from each other and fill the block-out spaces (S) while surrounding the connecting rebars, in which the connecting rebars adjacent to each other are connected to each other without a coupler by a frictional force generated by the contactless ring connection members being buried in a finishing grout with which the block-out spaces (S) are filled.
A method of constructing a precast structure manufactured using a contactless coupler of the present invention, includes (a) a step of allowing connecting rebars to be separated from each other and adjacent to each other by adjoining the precast structures in which the connecting rebars drawn from block-out spaces (S), respectively, are formed so that the block-out spaces (S) communicate with each other and (b) a step of disposing a plurality of contactless ring connection members to be spaced apart around the connecting rebars separated from each other and fill the block-out spaces (S) while surrounding the connecting rebars and installing the contactless ring connection members using a rib connector that includes both horizontal channel bodies in which a plurality of joint grooves are formed so that left and right side surfaces of the contactless ring connection members set around both connecting rebars are insertable and is installed through the block-out spaces (S) adjacent to and communicating with each other.
According to the present invention, since, rather than connecting rebars exposed to the outside while directly contacting the connecting rebars to each other and connecting the connecting rebars to each other by a fastening force, a frictional force is effectively utilized by finishing grouting that fills block-out spaces around the connecting rebars and a rebar head capable of being formed in advance on the connecting rebars is used, it is possible to effectively secure workability and constructability for connection work of the connecting rebars.
In addition, as the rebar head can be integrated in advance with the connecting rebars or installed at a site, the rebar head can be installed to enable optimization to secure a frictional force and a fixation force, thereby maximizing the connection performance of a precast structure.
In addition, according to the present invention, by further installing contactless ring connection members and a rib connector around the connecting rebar, in addition to the rebar head, it is possible to provide reinforcement while restraining cured finishing grouting around the connecting rebar and simplify installation, so that it is possible to provide a contactless coupler that allows quick and economical precast structure connection, and a precast structure manufactured using the same.
A contactless coupler including connecting rebars drawn from communicating block-out spaces (S) of precast structures adjacent to each other, respectively, and a plurality of contactless ring connection members disposed to be spaced apart around the connecting rebars that are adjacent and separated from each other and fill the block-out spaces (S) while surrounding the connecting rebars, in which the connecting rebars adjacent to each other are connected to each other without a coupler by a frictional force generated by the contactless ring connection members being buried in a finishing grout with which the block-out spaces (S) are filled, is considered as the best mode.
Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art may easily perform the present invention. However, the present invention may be implemented in many different forms and is not limited to the embodiments described herein. In the drawings, in order to clarify the present invention, parts that are not related to description are omitted and like reference numerals represent like elements throughout the specification.
In the entire specification, when a part “includes” or “comprises” a component, unless described to the contrary, the term “includes” or “comprises” does not indicate that the part excludes another component but instead indicates that the part may further include the other component.
is an exemplary view of a contactless couplerof the present invention,is an exemplary view of a rib connectorof the present invention, andare exemplary views of a rebar headof the present invention.
Referring to, since the contactless couplerstructurally connects connecting rebarsof a precast structureby installing a contactless ring connection memberand a rib connectorin block-out spaces S around the connecting rebarswithout direct contact with the connecting rebars, the name, “contactless” is used in that there is no need for work to mechanically connect the connecting rebarsto each other using a coupler or the like,
Since when the connecting rebarsare connected in the contactless method, the connecting rebarsare not directly connected to each other, manufacturing and construction errors of the precast structuremay also be absorbed, thereby securing constructability and workability.
In this case, after transporting the precast structuresmanufactured in advance at a factory, or the like, to a site, the present invention structurally connects the precast structuresto each other using the contactless couplerand may be applied to various precast structuressuch as culverts and tunnels.
To this end, as shown in, the contactless coupleris used to connect the connecting rebarsof the precast structureto each other in a contactless manner and includes a rebar headand contactless ring connection members, a rib connector, and a finishing grout.
First, the precast structureis a steel concrete member manufactured in advance using formwork at a factory, and tendons (not shown) may be further installed thereon to introduce prestress,
For example, the precast structuremay be considered a module member for construction by manufacturing various reinforced concrete structures such as culverts, underground and above-ground tunnels, and the like in a precast method and connecting the concrete structures to each other.
In this case, for manufacturing, transportation and construction, the precast structurehas no choice but to be manufactured to a certain size,
In order to connect the precast structuresto each other at the site, referring to, the connecting rebars CRand CRdrawn from the block-out spaces S are usually connected to each other using couplersand, and the block-out spaces S are finished with grout so that the precast members PCand PCare connected to each other.
However, structural couplers are expensive, and when the central axes of the connecting rebars CRand CRadjacent to each other drawn from the block-out spaces S do not coincide, in some cases, fastening is not possible, so the precast members PCand PCare inevitably affected by construction and manufacturing errors.
In addition, torque to fasten the couplersandhas to be consistently introduced, but in some cases, quality control becomes difficult due to site conditions.
Accordingly, as shown in, the present invention does not use the couplersandin the related art, which have to directly fasten the connecting rebarsadjacent to each other, By installing the contactless ring connection membersdisposed to be spaced apart to surround the connecting rebarsand allowing the contactless ring connection membersto also be buried by the finishing grout, the integration of the connecting rebarsis complemented by an anchoring force caused by a frictional force caused by the finishing grout.
In addition, the rib connectoris installed to facilitate setting while preventing the position of the contactless ring connection membersfrom being changed due to the finishing groutwith which the block-out spaces S are filled.
The rib connectoris installed through the block-out spaces S and also serves to secure connection performance at a connection joint surface of the precast structure.
In addition, the rebar headis further formed on the connecting rebars, and the block-out spaces S are filled with the finishing groutso that the rebar headis buried, thereby using a method of connecting the connecting rebarsto each other by the anchoring force caused by the frictional force.
Accordingly, the rebar headis formed in the form of an enlarged head formed to contact both connecting rebarsof the precast structure, as shown in.
It can be seen that the rebar headmay be formed in the form of a cylindrical block with anchoring performance while contacting the connecting rebars, and a plurality of rebar headsare formed on the respective connecting rebarsby being spaced apart from each other.
The rebar headwill be described with reference toas follows.
The rebar headmay be installed on the connecting rebarby welding as shown inor mechanically installed on the connecting rebaras shown in, thereby sufficiently securing workability and constructability.
In this case, welding-type in the welding-type rebar headmeans that an enlarged node bodyis fixed to the connecting rebarby welding, and as shown in, the rebar headincludes the enlarged node body, end fixing devices, and an enlarged node portion.
Accordingly, as shown in, the enlarged node bodyis formed to be, for example, divided (partitioned) into two parts and installed to surround and contact an outer peripheral surface of the connecting rebar, which allows workers to simply assemble and install the enlarged node bodyon the outer peripheral surface of the connecting rebarthat extend and protrude from the precast structure, and the enlarged node bodyincludes an enlarged body portion, an end fixing portion, and an enlarged node connection portion
First, as shown in, the enlarged body portionmay be divided into at least two parts to be installed to surround and contact the outer peripheral surface of the connecting rebar.
Unknown
October 23, 2025
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