WO2024025223A1

WO2024025223A1 - Contactless coupler, precast structure manufactured using same, and method for constructing same

Info

Publication number: WO2024025223A1
Application number: PCT/KR2023/010116
Authority: WO
Inventors: 김건수; 박기태
Original assignee: 한국건설기술연구원
Priority date: 2022-07-28
Filing date: 2023-07-14
Publication date: 2024-02-01
Also published as: KR20240015848A

Abstract

The present invention relates to a contactless coupler, and a precast structure manufactured using same, wherein when extending connection rebars are connected to each other in block-out spaces (S) of precast structures, the connection rebars can be connected in a contactless manner even without being directly connected using a coupler, thereby ensuring the workability and efficiency of precast structure construction. The contactless coupler includes: connection rebars respectively extending to block-out spaces (S) of precast structures adjacent to each other, the spaces (S) communicating with each other; and a plurality of contactless ring connection members spaced from the periphery of the connection rebars adjacent to be separated from each other, the plurality of contactless ring connection members being arranged to fill the block-out spaces (S) while surrounding the connection rebars. Therefore, the adjacent connection rebars can be connected to each other without a coupler by the friction generated by the contactless ring connection members embedded in a finishing grout filled in the block-out spaces (S).

Description

Non-contact coupler, precast structure manufactured using it, and its construction method

The present invention relates to a non-contact coupler and a precast structure manufactured using the same. More specifically, in connecting the connecting reinforcing bars drawn from the blockout space (S) of the precast structure, it is possible to connect the connecting reinforcing bars to each other in a non-contact manner without directly connecting them using a coupler, so that the precast structure It relates to a non-contact coupler that can sufficiently ensure workability and efficiency of construction, a precast structure manufactured using the same, and a construction method thereof.

Figure 1a shows an example of coupler construction of conventional precast members (PC1, PC2).

In other words, the precast members (PC1, PC2) are manufactured separately and constructed to be connected. For this connection construction, the connecting reinforcing bars (CR1, CR2) extracted from the precast members in the externally exposed blockout portion are connected to the coupler (1). You can see that they are connected using ,2).

That is, the female coupler (2) is fastened to the connecting reinforcing bar of one precast member (PC1), the male coupler (1) is fastened to the connecting reinforcing bar of the other precast member (PC2), and the male coupler (1) By inserting and fastening into the female coupler (2), the connecting reinforcing bars (ET1, ET2) are directly fastened using the couplers (1 and 2).

Accordingly, since the couplers (1, 2) are connected to the connecting reinforcing bars (ET1, ET2) by rotating the threaded portion, bolts, and nuts, the bolt and nut fastening work is repeated, which means sacrificing some workability and constructability. A problem arises.

In addition, if the connecting reinforcing bars (ET1, ET2) are not located on the same central axis due to manufacturing or construction errors of the precast members (PC1, PC2), they are inserted into the male coupler (1) and the female coupler (2). There were cases where it was impossible to fasten, and the couplers (1, 2) were very expensive, so there was a limit to securing economic feasibility.

Figure 1b shows an example of connection construction using the enlarged head 20 of a conventional concrete member.

The concrete member may be manufactured as a precast member, but may also be constructed by pouring and curing cast-in-place concrete using a formwork.

It can be seen that the concrete members can be connected to each other by setting the connecting reinforcing bars (10) in an

At this time, it can be seen that the enlarged head 21 is formed at the split end 20 of the connecting reinforcing bar 10 to surround the end, thereby increasing the anchoring performance of the end of the connecting reinforcing bar 10.

In other words, the connecting reinforcing bar (10) is used as a deformed reinforcing bar, but the ring-shaped enlarged head (20) can be integrated in advance with the end (20) of the connecting reinforcing bar (10) in order to increase the friction force while increasing the contact area with the concrete. You can see that there is.

Figure 1c shows an example of a fixing device for tension members that installs tension members in a conventional concrete member (girder, etc.) and anchors them to the concrete member.

Tension members are used to introduce prestress into concrete members, and these tendons are usually made of PC steel strands so that prestress is introduced through reaction force caused by settling after tension.

Accordingly, the anchoring device 30 is used to anchor the tensioned tendon to the concrete member,

This fixing device 30 has a basic structure of a fixing plate 31 and an anchor head 32,

The tension member 33 set to penetrate the anchoring plate 31 is tensioned and then anchored by a wedge (not shown) inserted into the through hole of the anchor head 32.

At this time, a plurality of tension members 33 are usually installed, and when installed by the post-tension method, they are installed inside the sheath 34.

In this anchoring process, when the anchor plate 31 comes into contact with the concrete member 35, significant local stress is concentrated, so it can be seen that the reinforcing bar 36 is formed integrally with the anchor head 37 inside the concrete member. .

Accordingly, it can be seen that in order to connect conventional precast concrete members (precast members) to each other, a method can be used to simply connect the connecting reinforcing bars directly using a coupler and then finish them with finishing grouting, and the anchoring performance of the connecting reinforcing bars can be improved. In order to secure the

When introducing prestress by tendons, it can be seen that the reinforcing bars 36 can be formed in a spiral shape to reinforce the local stress caused by the introduced prestress, but these reinforcing bars 36 are used to reinforce concrete according to the introduction of prestress. It can be seen that it is only used as a means.

Accordingly, in order to connect precast structures to each other in an externally exposed space (block-out space (S)), the present invention uses a non-contact method of connecting connecting reinforcing bars, rather than mechanically connecting them by directly contacting the connecting reinforcing bars like a conventional coupler. The technical task is to provide a non-contact coupler that can be connected to each other while securing sufficient anchoring performance required for connection, and a precast structure manufactured using the same.

In addition, the present invention connects the connecting reinforcing bars to each other in a non-contact manner, and improves the binding force by wrapping the connecting reinforcing bars, thereby effectively resisting the shear force and separation force at the joint surface and ensuring workability and constructability, thereby providing a quick and economical pre-freezing structure. The technical challenge is to provide a non-contact coupler capable of connecting cast structures and a precast structure manufactured using it.

The non-contact coupler of the present invention for achieving the above problem includes connecting reinforcing bars each drawn out in the communicating blockout space (S) of adjacent precast structures; And a plurality of non-contact ring connection members arranged to fill the block-out space (S) while being spaced around the adjacent and separated connection reinforcing bars and surrounding the connection reinforcing bars; including, filled in the block-out space (S) The friction force generated by embedding the non-contact ring connecting member in the finishing grout allows adjacent connecting reinforcing bars to be connected to each other without a coupler.

In addition, the precast structure manufactured using the non-contact coupler of the present invention is a precast structure manufactured using a non-contact coupler provided with connecting reinforcing bars each drawn out in the block-out space (S) adjacent to and communicating with each other. , a plurality of non-contact ring connection members arranged to fill the block-out space (S) while being spaced around the connecting reinforcing bars that are adjacent and separated from each other and surrounding the connecting reinforcing bars; including, filling the block-out space (S) The non-contact ring connecting member is embedded in the finishing grout, and the friction generated causes adjacent connecting reinforcing bars to be connected to each other without a coupler.

The method of constructing a precast structure manufactured using the non-contact coupler of the present invention is (a) adjacent to each other the precast structures in which connecting reinforcing bars are drawn out in the block-out space (S), so that the block-out space (S) is formed. A step of allowing the connecting reinforcing bars to communicate with each other and be separated from each other and adjacent to each other; (b) Arrange a number of non-contact ring connection members spaced apart from each other around the connection reinforcement bars to fill the block-out space (S) while surrounding the connection reinforcement bars, and place the left side of the non-contact ring connection members set around both connection reinforcement bars. , Installing using a rib connector installed through a block-out space (S) adjacent to each other and communicating with both horizontal channel body parts formed with a plurality of joining grooves so that the right side can be inserted; do.

According to the present invention, rather than connecting the connecting reinforcing bars exposed to the outside by directly contacting each other and combining them with each other by fastening force, friction force is effectively used by finishing grouting filled in the block-out space around the connecting reinforcing bars, but the connecting reinforcing bars are connected. Since a rebar head that can be formed in advance on the rebar is used, workability and constructability for connecting rebars can be effectively secured.

In addition, the head for the rebar can be integrated in advance with the connecting rebar, or installed in a way that can be installed in the field and optimized to secure friction and anchorage, thereby maximizing the connection performance of the precast structure.

In addition, according to the present invention, in addition to the head for the rebar, a non-contact ring connecting member and a rib connector are further installed around the connecting rebar, thereby constraining and reinforcing the cured finish grouting around the connecting rebar, and simple installation work is possible, making it quick and economical. It is possible to provide a non-contact coupler capable of connecting precast structures and a precast structure manufactured using the same.

Figure 1a is an example of coupler construction of a conventional precast member,

Figure 1b is an example of connection construction using an enlarged head of a conventional concrete member,

Figure 1c is an illustration of a fixing device for tension members that installs tension members in a conventional concrete member and anchors them to the concrete member;

2A is an illustration of a non-contact coupler of the present invention,

Figure 2b is an illustration of the rib connector of the present invention,

3A and 3B are exemplary views of the head for rebar of the present invention;

Figure 4 is an example of a precast structure manufactured using the non-contact coupler of the present invention;

Figures 5a, 5b, and 5c show examples of manufacturing a precast structure manufactured using the non-contact coupler of the present invention.

Connecting reinforcing bars drawn from each connected blockout space (S) of adjacent precast structures; And a plurality of non-contact ring connection members arranged to fill the block-out space (S) while being spaced around the adjacent and separated connection reinforcing bars and surrounding the connection reinforcing bars; including, filled in the block-out space (S) The best form is a non-contact coupler that allows adjacent connecting reinforcing bars to be connected to each other without a coupler by the friction generated by embedding the non-contact ring connecting member in the finishing grout.

Below, with reference to the attached drawings, embodiments of the present invention will be described in detail so that those skilled in the art can easily implement the present invention. However, the present invention may be implemented in many different forms and is not limited to the embodiments described herein. In order to clearly explain the present invention in the drawings, parts that are not related to the description are omitted, and similar parts are given similar reference numerals throughout the specification.

Throughout the specification, when a part is said to “include” a certain element, this means that it may further include other elements rather than excluding other elements, unless specifically stated to the contrary.

[Non-contact coupler (100) of the present invention]

Figure 2A is an exemplary diagram of the non-contact coupler 100 of the present invention, Figure 2B is an exemplary diagram of the rib connector 130 of the present invention, and Figures 3A and 3B are exemplary diagrams of the rebar head 110 of the present invention. It was done.

Referring to FIGS. 2A and 2B, the non-contact gutter 100 does not directly contact the connecting reinforcing bar 210 of the precast structure 200, but is located in the block-out space (S) around the connecting reinforcing bar 210. Since the non-contact ring connecting member 120 and the rib connector 130 are installed to structurally connect each other, the non-contact type is non-contact in that there is no need for work to mechanically connect the connecting reinforcing bars 210 themselves using couplers, etc. The name will be used,

When the connecting reinforcing bars 210 are connected in this non-contact method, the manufacturing and construction errors of the precast structure 200 can be absorbed because the connecting reinforcing bars 210 are not directly connected to each other, thereby ensuring constructability and workability. It becomes possible.

At this time, the precast structure 200 is manufactured in advance at a factory and transported to the site, and then structurally connected to each other using the non-contact coupler 100, and is used in various precast structures 200 such as culverts and tunnels. Application becomes possible.

For this purpose, the non-contact coupler 100 is used to connect the connecting reinforcing bars 210 of the precast structure 200 to each other in a non-contact manner, as shown in FIGS. 2A and 2B, and includes a reinforcing bar head 110 and a non-contact ring connecting member 120. ), rib connector 130, and finishing grout 140.

First, the precast structure 200 is a steel concrete member manufactured in advance at a factory using a formwork, and tension members (not shown) may be further installed to introduce prestress,

For example, it can be said to be a module member for constructing various reinforced concrete structures, such as culverts, underground and above-ground tunnels, by manufacturing them using the precast method and connecting them to each other.

At this time, for manufacturing, transportation and construction, the precast structure 200 has no choice but to be manufactured to a certain size.

In order to connect them to each other in the field, referring to Figure 1a, the connecting reinforcing bars (CR1, CR2) drawn into the block-out space (S) are usually connected to each other using couplers (1, 2), and the block-out space ( S) is finished with grout to connect the precast members (PC1, PC2) to each other.

However, structural couplers are expensive, and if the central axes of the adjacent connecting rebars (CR1, CR2) drawn into the block-out space (S) do not match each other, they may not be fastened, so the precast members (PC1, PC2) It is inevitably affected by construction and manufacturing errors.

In addition, a constant torque must be introduced to fasten the couplers (1, 2), but quality control becomes difficult due to field conditions.

Accordingly, as shown in Figure 2a, the present invention does not use the conventional couplers 1 and 2, which require directly fastening the connecting reinforcing bars 210 adjacent to each other,

By installing a non-contact ring connecting member 120 arranged to be spaced apart and surrounding the connecting reinforcing bar 210, and allowing the non-contact ring connecting member 120 to also be embedded by the finishing grout 140, the finishing grout 140 The integration of the connecting reinforcing bars 210 is complemented by the anchoring force caused by the friction force.

In addition, a rib connector 130 is installed to facilitate setting while preventing the position of the non-contact ring connection member 120 from changing due to the finishing grout 140 filled in the block-out space (S).

This rib connector 130 is installed to penetrate the block-out space (S) and also plays a role in securing connection performance at the connection joint surface of the precast structure 200.

In addition, a reinforcing bar head 110 is further formed on the connecting reinforcing bar 210, and the finishing grout 140 is filled in the block-out space S so that the reinforcing bar head 110 is embedded, thereby creating a fixation force due to friction. A method of connecting the connecting reinforcing bars 210 to each other is used.

Accordingly, the head 110 for the reinforcing bar is formed in the form of an enlarged head formed to contact both connecting reinforcing bars 210 of the precast structure 200, as shown in FIG. 2a.

It can be seen that the head 110 for these reinforcing bars can be formed in the form of a cylindrical block with anchoring performance while contacting the connecting reinforcing bars 210, and a plurality of them are spaced apart from each other to form each connecting reinforcing bar 210.

The rebar head 110 will be described with reference to FIGS. 3A and 3B as follows.

The head 110 for the reinforcing bar can be installed on the connecting reinforcing bar 210 by welding as shown in FIG. 3a or mechanically installed on the connecting reinforcing bar 210 as shown in FIG. 3b, thereby ensuring sufficient workability and constructability. I do it.

At this time, in the welded rebar head 110, the meaning of welding means that the enlarged joint body 111 is fixed to the connecting reinforcing bar 210 by welding. As shown in Figure 3a, the enlarged joint body 111, It includes an end fixing device 112 and an enlarged nodule 113.

Accordingly, the enlarged joint body portion 111 is divided (divided) into two parts, for example, as shown in Figure 3a, and is formed so that it can be installed in contact with the outer peripheral surface of the connecting reinforcing bar 210, which is a connecting reinforcing bar extending and protruding from the precast structure 200. (210) It is designed to allow workers to simply assemble and install the outer peripheral surface, and includes an enlarged body portion (111a), an end fixing portion (111b), and an enlarged joint connection portion (111c).

First, the enlarged body portion 111a is divided into at least two pieces, as shown in FIG. 3A, and is installed so as to surround and contact the outer peripheral surface of the connecting reinforcing bar 210.

At this time, the area where the enlarged body portion 111a and the connecting reinforcing bar 210 come into contact with each other is formed with an inner groove 111d on the inner surface where the nodes and ribs of the connecting reinforcing bar 210 are accommodated, so that the worker can place the above at any position. The enlarged body portion 111a can be easily set, and the desired number can be installed. By welding, the inner groove 111d is filled with the used metal to ensure secure installation.

Next, the end fixing part 111b is formed integrally in a ring shape at both side ends of the enlarged body 111a, as shown in Figure 3a, to ensure workability, and is attached to the outer peripheral surface with an end fixing device (described later) 112) comes into contact with it.

This end fixing device 112 is intended to maintain the temporarily joined form of the divided enlarged body portions 111a, and can be removed after the enlarged body portions 111a are fixed and installed by welding.

That is, the head 110 for a welded rebar of the present invention is a metal used by welding (arc welding, etc.) the enlarged body portion 111a to the connection surface of the enlarged body portion 111a divided into the connecting reinforcing bar 210. (There may be differences depending on the material of the welding rod, etc.) is filled in the inner groove (111d) to enable secure fixed installation.

At this time, in order to fill the inner groove (111d) with the molten metal, a welding hole exposing the inner groove (111d) is formed in the enlarged joint body portion 111, or a reinforcing bar connecting both ends of the expanded joint body portion 111 is formed. A method of filling by folding using the separation from (210) can be used.

Next, the enlarged joint connecting portion 111c is a fastening portion formed on the outer peripheral surface between the end fixing portions 111b on both sides of the enlarged body portion 111a, as shown in FIG. 3A, so that the enlarged joint portion 113 is detachably installed. It plays a role.

This enlarged joint connection part (111c) is a fastening part, and concave and convex parts are continuously formed at the area in contact with concrete to ensure basic adhesion, but an enlarged joint part 113, which will be described later, is added to this enlarged joint connection part 111c. By installing it, the attachment area is expanded to improve attachment force, and acupressure performance can be adjusted according to direction.

Next, as shown in Figure 3a, the end fixing device 112 fixes the enlarged torso 111a to the connecting reinforcing bar 210 by welding in a state where the enlarged torso 111a of the enlarged joint torso 111 is installed. For installation, for example, it is formed in a ring shape with an inner surface corresponding to the outer peripheral surface of the end fixing portion (111b).

Accordingly, by setting the end fixing device 112 in contact with the end fixing part 111b, it serves to maintain the divided enlarged body part 111a in a joined state, and the enlarged body part 111a is formed by welding. It is fixedly installed on the connecting rebar (210).

It is preferable that two of these end fixing devices 112 are installed at the ends on both sides of the enlarged joint body 111. Although not shown, there is a problem in securing adhesion even if they are installed only at one end of the enlarged joint body 111. If not, it is possible.

In addition, the end fixing device 112 is fixed and installed by welding the enlarged body portion 111a to the connecting reinforcing bar 210 by welding (arc welding, etc.) after allowing the connecting reinforcing bar 210 to penetrate in advance, It can be separated from the end fixing part 111b, and can be formed into a ring shape using an insulating material (ceramic, etc.).

Next, as shown in FIG. 3a, the enlarged joint portion 113 additionally secures the adhesion force with the finishing grout 140 of the reinforcing bar head 110 installed on the connecting reinforcing bar 210 and allows adjustment of acupressure performance according to direction. It was done.

That is, an enlarged joint connection portion 111c is formed as a screw fastening portion on the outer peripheral surface of the enlarged body portion 111a of the enlarged joint body portion 111 discussed above, and basically secures adhesion to the finishing grout 140 by using concave portions and convex portions. It can be secured by

In order to secure additional adhesion by expanding the attachment area, an additional enlarged joint portion 113 is installed to be detachable from the enlarged joint connection portion 111c.

In other words, it is installed in the form of a ring with a threaded portion formed on the inner surface fastened to the enlarged joint connection portion 111c to enable detachment, and the enlarged joint body portion 111 is installed in a form perpendicular to the connecting reinforcing bar 210 to improve acupressure performance. can be secured.

Next, referring to Figure 3b, the mechanical rebar head 110 includes an enlarged joint body portion 111, an end fixing device 112, and an enlarged joint portion 113 compared to the welded rebar head 110. It is the same to do so, and here the mechanical meaning means that the enlarged joint body portion 111 is fixed by compression by rotating the end fixing device 112 to the connecting reinforcing bar 210.

Accordingly, as shown in Figure 3b, the enlarged joint body portion 111 is also divided into two and formed to be installed surrounding the outer peripheral surface of the connecting reinforcing bar 210, which is a connecting reinforcing bar extending and protruding from the precast structure 200. (210) It is designed to allow workers to simply assemble and install the outer peripheral surface, and includes an enlarged body portion (111a), an end fixing portion (111b), and an enlarged joint connection portion (111c), which is the same as the welding type.

Accordingly, the enlarged body portion 111a is divided into at least two parts, as shown in FIG. 3b, and is formed to surround the connecting reinforcing bar 210, so that it can be installed to surround the outer peripheral surface of the connecting reinforcing bar 210.

At this time, compared to the welded reinforcing bar head 110, the area where the enlarged body portion 111a and the connecting reinforcing bar 210 come into contact with each other are formed to directly contact the nodes and ribs of the connecting reinforcing bar 210, unlike the inner groove ( There is a difference in preventing 111d) from being formed,

Accordingly, it can be seen that the enlarged body portion 111a is made of a material that can be compressed and is in direct contact with the ribs and nodes of the connecting reinforcing bar 210 so that it can be finally compressed by the end fixing device 112. As a result, the worker can arbitrarily press it. It is the same as being able to simply set the enlarged body portion 111a at the location and install the desired number.

As shown in Figure 3b, the end fixing portion 111b is formed integrally with both side ends of the enlarged body portion 111a, and a screw portion is formed on the upper surface so that the end fixing device 112 does not simply contact,

While being integrated into the threaded portion by screwing, the end fixing device 112 serves to integrate the enlarged body portion 111a with the connecting reinforcing bar 210 by pressing the end fixing portion 111b to the outer peripheral surface of the connecting reinforcing bar 210. It is different from the welded rebar head 110 discussed above in that it does this.

The enlarged joint connecting portion 111c is a fastening portion formed on the outer peripheral surface between the end fixing portions 111b on both sides of the enlarged body portion 111a, as shown in Figure 3b, and serves to ensure that the enlarged joint portion 113 is detachably installed. It is the same to do

Additionally, the mechanical rebar head 110 of the present invention connects the enlarged body portion 111a to the reinforcing bar 210, and the enlarged joint portion 113, along with the end fixing portion 111b, is mechanically operated by the enlarged joint connection portion 111c. It is different from the welded rebar head 110 discussed earlier in that it also plays the role of allowing additional compression.

This enlarged joint connection part (111c) is a fastening part, and concave and convex parts are continuously formed at the area in contact with concrete, so that basic adhesion can be secured, but by additionally installing an enlarged joint part 113 on this enlarged joint connection part 111c. By expanding the attachment area, the attachment force is improved, and acupressure performance can be adjusted according to direction.

Next, the end fixing device 112 is used to fix and install the enlarged torso 111a on the connecting reinforcing bar 210 in a state where the enlarged torso 111a of the enlarged joint body 111 is installed, as shown in FIG. 3b. It is the same as that formed in a ring shape with an inner surface corresponding to the bent portion of the end fixing portion (111b).

However, the end fixing device 112 is screwed to the fastening part formed at the bend of the end fixing part 111b, and the end fixing device 112 is pressed against the connecting reinforcing bar 210 by rotating it. There is a difference in the role of fixing the enlarged joint body portion 111 to the connecting reinforcing bar 210.

It is preferable that two end fixing devices 112 are installed at both ends of the enlarged joint body 111. Although not shown, there is a problem in securing attachment even if they are installed only at one end of the enlarged joint body 111. If not, the possibilities are the same,

In addition, the end fixing device 112 allows the connecting reinforcing bar 210 to penetrate in advance, sets the enlarged joint body 111, and compresses the enlarged jointed body 111 to the connecting reinforcing bar 210. It can be installed fixedly, and it is preferable not to separate and remove it.

As shown in FIG. 3b, the enlarged joint portion 113 additionally secures the adhesion force of the mechanical reinforcing bar head 110 installed on the connecting reinforcing bar 210 to the concrete and also enables adjustment of acupressure performance according to direction. do.

As expected, an enlarged joint connection portion (111c) is formed as a screw fastening portion on the outer peripheral surface of the enlarged body portion (111a) of the enlarged joint body portion (111) seen above, and basically secures adhesion to the finishing grout (140) by using concave and convex portions. It can be secured by

In order to further secure attachment force by expanding the attachment area, an enlarged joint portion 113 is additionally installed to be detachable from the enlarged joint connection portion 111c.

That is, it is installed in the form of a ring with a threaded portion formed on the inner surface fastened to the enlarged joint connection portion 111c, making it detachable, and the enlarged joint portion 113 is installed in a form perpendicular to the connecting reinforcing bar 210 to improve acupressure performance. can be secured.

Next, as shown in FIGS. 2A and 2B, the non-contact ring connecting member 120 is spaced apart around the connecting reinforcing bar 210 and is arranged to fill the block-out space S to surround the connecting reinforcing bar 210 to form a finishing grout. By allowing it to be reclaimed by (140),

It is designed to complement the integration of the connecting reinforcing bars (210) by anchoring force caused by friction caused by the finishing grout (140).

It can be seen that this non-contact ring connection member 120 is formed in a circular ring shape. That is, the connecting reinforcing bars 210 adjacent to each other are separated from each other, but since the non-contact ring connecting member 120 can be arranged to be spaced apart from each other around the connecting reinforcing bars 210 adjacent to each other, the connecting reinforcing bars 210 adjacent to each other ) serves to structurally connect them to each other using frictional force with the finishing grout 140.

Although it is shown in the form of a circular ring, it can be formed in various shapes as long as it can be placed in the block-out space (S) and wrapped around the connecting reinforcing bar 210.

Using the non-contact ring connection member 120 in the form of a plurality of circular rings in this way increases the contact area with the finishing grout 140 and has the advantage of being able to use a ready-made product as is. To this end, a number of The fiber can be coated so that the projections can be formed naturally.

Accordingly, if the worker sets the connecting reinforcing bars 210 on one side so that they are spaced apart from one another and the connecting reinforcing bars 210 on the other side are set adjacent to each other, the worker can also set them so that they are spaced apart from each other, which greatly improves workability.

Next, as shown in FIGS. 2A and 2B, the rib connector 130 allows a plurality of circular ring-shaped non-contact ring connection members 120 to be quickly installed at regular intervals in the block-out space S, while allowing them to connect to each other. After being installed through the adjacent communicating blockout space (S), it is embedded in the finishing grout (140) to ensure connection performance at the connection surface (D) of the precast structure (200) by friction force. It is for.

Accordingly, according to FIGS. 2A and 2B, a horizontal channel in which a plurality of joint grooves 132 are formed so that the left and right sides of the non-contact ring connecting member 120 in the form of a circular ring set around both connecting reinforcing bars 210 can be inserted It can be seen that the body portion 131 can be used.

Accordingly, the horizontal channel body 131 is spaced apart from each other in the form of a horizontal plate, so that both connecting reinforcing bars 210 and a plurality of circular ring-shaped non-contact ring connecting members 120 are set between them, and the precast structure ( 200), it is installed to cross the joint surface of the precast structure to more effectively resist the shear force acting on the joint surface of the precast structure.

The joint groove 132 is positioned so that both sides of the circular ring-shaped non-contact ring connecting member 120 are inserted and contacted between the two horizontal channel body portions 131. It plays a role in fixing the.

Accordingly, according to FIG. 2C, the side of the non-contact ring connection member 120 in the form of a circular ring, which is formed in a semicircular shape, an inclined semicircular shape, an L-shaped locking sphere shape, a trapezoidal shape, etc., is inserted and caught.

Accordingly, it is desirable to first install the non-contact ring connection member 120 in the form of a circular ring to surround the connecting reinforcing bar 210 by first joining and integrating it with the rib connector 130, and each spaced apart rib connector 130 is It is natural that multiple connections can be made in the longitudinal direction, and the side joints of the non-contact ring connection member 120 in the form of a circular ring do not necessarily have to be installed so that two are spaced apart from each other.

There is no limit to the number of installations, such as two on one side and two correspondingly on the other side.

Next, the finishing grout 140 is a rebar head 110 formed in the blockout space (S) formed in communication with each other at the connection joint surface (D) of the precast structure 200, as shown in FIGS. 2A and 2B. , the non-contact ring connection member 120, and the rib connector 130 are embedded and finished to integrate them with each other.

Therefore, it does not matter whether non-shrinking mortar or concrete is used, and the fixing performance and the precast structure 200 can be integrated through friction with the rebar head 110, the non-contact ring connection member 120, and the rib connector 130. It plays a role in doing that.

[Precast structure (200) manufactured using the non-contact coupler (100) of the present invention]

Figure 4 shows an example of a precast structure 200 manufactured using the non-contact coupler 100 of the present invention.

As the precast structure 200, FIG. 4 illustrates an L-shaped retaining wall.

It can be seen that this L-shaped retaining wall is formed of a bottom plate 230 and a wall 240, and this L-shaped retaining wall has a block-out space ( It can be seen that a number of S) are spaced apart in the longitudinal direction (direction of connection to the L-shaped retaining wall).

Accordingly, connecting reinforcing bars 210 to be connected to each other are exposed in the block-out space (S) of the bottom plate 230 and the wall 240,

The reinforcing bar head 110 is installed separately at the site to the connecting reinforcing bar 210. When this reinforcing bar head 110 is used, the exposed extension length of the connecting reinforcing bar 210 can be minimized, making the connection more effective. Connection work of the rebar 210 becomes possible.

As a result, after each reinforcing bar head 110 is installed on the connecting reinforcing bar 210, the non-contact ring connecting member 120 is installed all at once using the rib connector 130.

Of course, it is okay to install them separately, but depending on site conditions, they can be installed all at once to enable quick work.

It can be seen that the rib connector 130 of the non-contact ring connection member 120 is set to penetrate the connection joint surface (D).

Accordingly, the final precast structure (A) is formed by pouring and curing the finishing grout (140) in the block-out space (S) so that the connecting reinforcing bar (210) on which the rib connector (130) is installed is embedded in the non-contact ring connecting member (120). They are structurally connected to each other.

[Construction method of precast structure (200) using non-contact coupler (100) of the present invention]

Figures 5a, 5b, and 5c show a construction flowchart of the precast structure 200 manufactured using the non-contact coupler 100 of the present invention.

Accordingly, according to Figure 5a, the precast structure 200 with the reinforcing head 110 of the non-contact coupler 100 installed on the connecting reinforcing bar 210 is manufactured in advance at a factory, etc., is brought into the site, and the connecting surfaces D are in contact with each other. You can see that the construction is being done so that they can be joined together.

The precast structure 200 is manufactured to integrate a number of reinforced concrete members by connecting them to each other, and can be a final culvert, etc., and has a box-shaped blockout part to structurally connect and integrate the connecting reinforcing bars 210. The space (S) is formed in advance.

Accordingly, according to FIG. 5A, the blockout spaces S of adjacent precast structures 200 are connected to each other and the connecting reinforcing bars 210 are installed to be connected to each other on the same axis using a conventional coupler. Construction errors, Problems occur if they do not match due to manufacturing errors.

In the present invention, without using a coupler, the reinforcing bar head 110, the non-contact ring connecting member 120, and the rib connector 130 are installed in a non-contact manner, and the connecting reinforcing bars 210 are connected to each other by filling the finishing grout 140. This will allow you to connect and install it.

At this time, referring to Figure 5a, it can be seen that connecting reinforcing bars 210 are drawn out in the blockout space (S) of both precast structures 200, and a reinforcing bar head ( 110) can be seen to be formed as one piece.

As the head 110 for such a rebar, a welded or mechanical rebar head 110 can be used, as shown in FIGS. 3A and 3B, and includes an enlarged joint body portion 111, an end fixing device 112, and an enlarged joint portion ( 113) can be formed to include.

Next, according to FIG. 5B, the non-contact ring connecting member 120 is arranged to surround the connecting reinforcing bars 210 adjacent to each other by using rib connectors 130 to be spaced apart around the connecting reinforcing bars 210.

Since the non-contact ring connecting member 120 is formed in the shape of a circular ring, it can be installed by inserting it into the connecting reinforcing bar 210, which improves workability and allows multiple initial settings to be spaced apart from each other.

These non-contact ring connection members 120 can be distributed throughout the communicating block-out space (S) and embedded by the finishing grout 140, so that the fixing force caused by the friction force caused by the finishing grout 140 This makes it possible to complement the integration of the connecting reinforcing bars 210.

At this time, two horizontal channel body portions 131 of the rib connector 130 are spaced apart from each other in the form of horizontal plates, and both connecting reinforcing bars 210 and a plurality of circular ring-shaped non-contact ring connecting members 120 are set between them. , It is installed across the connection joint surface of the precast structure 200 to more effectively resist the shear force acting on the connection joint surface of the precast structure, and the joint groove 132 is formed on both horizontal channel bodies 131. ) As we have seen, it serves to fix the position of the non-contact ring connection member 120 by inserting both sides of the non-contact ring connection member 120 in the form of a circular ring into contact between the two sides.

Next, as shown in Figure 5c, final finishing is performed by filling the block-out space (S) with finishing grout 140 so that the connecting reinforcing bars 210 connected to each other by the rib connector 130 and the non-contact ring connecting member 120 are buried. It will be done.

The rebar head 110, the non-contact ring connection member 120, and the rib connector 130 formed in the blockout subspace (S) formed in communication with each other on the connection surface (D) of the precast structure 200 are buried. Finishing grout (140) using non-shrink mortar, concrete, etc. is filled, and when finally cured, fixation performance and precast structure are improved through friction with the rebar head (110), non-contact ring connection member (120), and rib connector (130). Integration of (200) becomes possible.

The description of the present invention described above is for illustrative purposes, and those skilled in the art can understand that the present invention can be easily modified into other specific forms without changing the technical idea or essential features of the present invention. There will be. Therefore, the embodiments described above should be understood in all respects as illustrative and not restrictive. For example, each component described as unitary may be implemented in a distributed manner, and similarly, components described as distributed may also be implemented in a combined form.

The scope of the present invention is indicated by the claims described below rather than the detailed description above, and all changes or modified forms derived from the meaning and scope of the claims and their equivalent concepts should be construed as being included in the scope of the present invention. do.

Claims

Connecting reinforcing bars drawn from each connected blockout space (S) of adjacent precast structures; And a plurality of non-contact ring connection members arranged to fill the block-out space (S) while being spaced around the adjacent and separated connection reinforcing bars and surrounding the connection reinforcing bars; including, filled in the block-out space (S) A non-contact coupler that allows adjacent connecting rebars to be connected to each other without a coupler by the friction generated by embedding the non-contact ring connecting member in the finishing grout.
According to paragraph 1,

The non-contact ring connection member 120 includes a circular ring, and is a non-contact type in which a plurality of the non-contact ring connection members 120 are spaced apart around the connecting reinforcing bars 210, and further form protrusions to increase the contact area with the finishing grout 140. Coupler.
According to paragraph 1,

It includes both horizontal channel body portions 131 in which a plurality of joint grooves 132 are formed so that the left and right sides of the non-contact ring connecting member 120 set around both connecting reinforcing bars 210 can be inserted, and are adjacent to each other and communicate with each other. After being installed through the block-out space (S), it is embedded in the finishing grout 140 and further includes a rib connector 130 that secures connection performance at the joint surface of the precast structure 200 by friction force. Non-contact coupler.
According to paragraph 1,

A reinforcing bar head 110 is further installed on the connecting reinforcing bar 210, so that a non-contact ring connecting member 120 is installed around the connecting reinforcing bar 210 on which the reinforcing bar head 110 is installed, and the blockout space ( A non-contact coupler that allows adjacent connecting reinforcing bars (210) to be connected to each other without a coupler by the friction force generated by the reinforcing bar head (110) being embedded in the finishing grout (140) filled in S).
According to paragraph 4,

The rebar head 110 is

An enlarged body portion (111a) that is separated and installed to surround the outer peripheral surface of the connecting reinforcing bar (210); An end fixing portion (111b) formed integrally in a ring shape at both side ends of the enlarged body portion (111a) and installed on the upper surface to be in contact with the end fixing device 112; And an enlarged joint connecting portion (111c) formed on the outer peripheral surface between the end fixing portions (111b) on both sides of the enlarged body portion (111a) and in which the enlarged joint portion (113) is detachably formed. A non-contact coupler comprising a.
According to clause 5,

On the inner surface of the enlarged body portion 111a, an inner groove 111d in which the nodes and ribs of the connecting reinforcing bar 210 are accommodated is further formed at the area where the enlarged body portion 111a and the connecting reinforcing bar 210 are in contact with each other. , so that the inner groove (111d) is filled with molten metal by welding.

A non-contact coupler in which the enlarged body portion (111a) is fixed to the connecting reinforcing bar (210) by welding so that the reinforcing bar head (110) is attached to the connecting reinforcing bar (210) by welding.
According to clause 6,

The enlarged joint connection part 111c is a fastening part, and a concave part and a convex part are continuously formed at the area in contact with the finishing grout 140 to ensure adhesion, and the enlarged joint connection part 111c, which is the fastening part, is provided with an enlarged joint part ( 113) is installed to expand the attachment area, improve adhesion, and enable adjustment of acupressure performance according to direction.
In clause 7,

The enlarged joint portion 113 is installed in the form of a ring with a threaded portion formed on the inner surface fastened to the enlarged joint connection portion 111c to enable detachment, and the enlarged joint body portion 111 is perpendicular to the connecting reinforcing bar 210. A non-contact coupler that is installed in a certain shape to ensure acupressure performance.
In clause 7,

The end fixing device 112 is fixed to the connecting reinforcing bar 210 by pressing, and the end fixing device 112 is fastened to the fastening part formed in the end fixing part 111b by screwing, and the connecting reinforcing bar 210 ) As the end fixing device 112 is rotated, the enlarged joint body portion 111 is pressed and fixed to the connecting reinforcing bar 210, so that the reinforcing bar head 110 is attached to the connecting reinforcing bar 210 by pressing. A non-contact coupler that makes it possible.
According to clause 9,

On the inner surface of the enlarged body portion 111a, the enlarged body portion 111a and the connecting reinforcing bar 210 are formed so that the nodes and ribs of the connecting reinforcing bar 210 are in direct contact, and the enlarged body portion 111a is compressed. As a possible material, it is pressed to the final connecting rebar (210),

The enlarged joint connection part 111c is a fastening part, and a concave part and a convex part are continuously formed at the area in contact with the finishing grout 140 to ensure adhesion, and the enlarged joint connection part 111c, which is the fastening part, is provided with an enlarged joint part ( 113), a non-contact coupler that improves adhesion by expanding the attachment area and allows adjustment of acupressure performance depending on direction.
In a precast structure manufactured using a non-contact coupler having connecting reinforcing bars each drawn out in block-out space (S) adjacent to each other and communicating with each other, connecting reinforcing bars are spaced apart around the connecting reinforcing bars that are adjacent and separated from each other. A plurality of non-contact ring connecting members arranged to surround and fill the block-out space (S), including a friction force generated by the non-contact ring connecting members being embedded in the finishing grout filled in the block-out space (S) A precast structure manufactured using a non-contact coupler that allows adjacent connecting rebars to be connected to each other without a coupler.
According to clause 11,

A reinforcing bar head 110 is further installed on the connecting reinforcing bar 210, so that a non-contact ring connecting member 120 is installed around the connecting reinforcing bar 210 on which the reinforcing bar head 110 is installed, and the blockout space ( A precast structure manufactured using a non-contact coupler that allows adjacent connecting rebars 210 to be connected to each other without a coupler by the friction generated by the rebar head 110 being embedded in the finishing grout 140 filled in S). .
(a) adjoining precast structures in which connecting reinforcing bars drawn out from each block-out space (S) are formed so that the block-out spaces (S) communicate with each other so that the connecting reinforcing bars are separated from each other and adjacent to each other;

(b) Arrange a number of non-contact ring connection members to be spaced around the separated connecting reinforcing bars and fill the block-out space (S) while surrounding the connecting reinforcing bars. The left side of the non-contact ring connecting members set around both connecting reinforcing bars is ,A non-contact method comprising: installing using a rib connector installed through a block-out space (S) adjacent to each other and communicating with both horizontal channel body parts having a plurality of joint grooves formed so that the right side can be inserted; A method of constructing a precast structure using a coupler.
According to clause 13,

After step (b) above,

The non-contact ring connection member 120 and the rib connector 130 are embedded in the finishing grout 140 filled in the block-out space (S), and the adjacent connecting reinforcing bars 210 are connected to each other without a coupler by the friction force generated. A method of constructing a precast structure manufactured using a non-contact coupler further comprising a step (c) of making it possible to do so.
According to clause 13,

A reinforcing bar head 110 is further installed on the connecting reinforcing bar 210 in step (a), so that a non-contact ring connecting member 120 is installed around the connecting reinforcing bar 210 on which the reinforcing bar head 110 is installed, The reinforcing bar head 110 is embedded in the finishing grout 140 filled in the block-out space (S), so that the adjacent connecting reinforcing bars 210 are connected to each other without a coupler by the friction force generated, and the reinforcing bar head (110) is an enlarged body portion (111a) that is separated and installed to surround the outer peripheral surface of the connecting reinforcing bar (210); An end fixing portion (111b) formed integrally in a ring shape at both side ends of the enlarged body portion (111a) and installed on the upper surface to be in contact with the end fixing device 112; And an enlarged joint connecting portion (111c) formed on the outer peripheral surface between the end fixing portions (111b) on both sides of the enlarged body portion (111a) and in which the enlarged joint portion (113) is detachably formed. A non-contact coupler comprising a. Precast structure construction method manufactured using.
According to clause 13,

The precast structure 200 in step (a) is a steel concrete member manufactured in advance using a formwork, and includes a culvert, an underground tunnel, and an above-ground tunnel, and the separate connecting reinforcing bars 210 are not on the same central axis line. A method of constructing a precast structure manufactured using a non-contact coupler that allows them to be connected to each other without a coupler by the non-contact coupler (100).