Non-contact coupler, precast structure manufactured using the same, and construction method thereof

Abstract

In connecting the connecting reinforcing bars drawn out to the block-out part space (S) of the precast structure to each other, even without directly connecting them using a coupler, since the connecting reinforcing bars can be connected in a non-contact manner, it relates to a non-contact coupler capable of ensuring the workability and efficiency of precast structure construction and a precast structure manufactured using the same. The non-contact coupler includes: connecting reinforcing bars respectively drawn out to the communicated block-out part spaces (S) of precast structures adjacent to each other; and a number of non-contact ring connecting members arranged so as to surround the connecting reinforcing bars at intervals around the adjacent and mutually separated connecting reinforcing bars and fill the block-out part space (S). By the frictional force generated when the non-contact ring connecting members are embedded in the finishing grout filled in the block-out part space (S), the connecting reinforcing bars adjacent to each other are to be connected to each other without a coupler.

Description

Technical Field

[0001] 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 out from the block-out part space S of the precast structure to each other, even without directly connecting them using a coupler, it is possible to connect the connecting reinforcing bars to each other in a non-contact manner, so that the workability and efficiency of precast structure construction can be sufficiently ensured. The present invention relates to a non-contact coupler, a precast structure manufactured using the same, and a construction method thereof.

Background Art

[0002] FIG. 1a illustrates an example of coupler construction of conventional precast members PC1 and PC2.

[0003] That is, the precast members PC1 and PC2 are separately manufactured and constructed to be connected. It can be seen that the connecting reinforcing bars CR1 and CR2 drawn out from the precast members at the block-out parts exposed to the outside for such connecting construction are connected using couplers 1 and 2.

[0004] That is, a female coupler 2 is fastened to the connecting reinforcing bar of one side's precast member PC1, and a male coupler 1 is fastened to the connecting reinforcing bar of the other side's precast member PC2, and the male coupler 1 is inserted and fastened to the female coupler 2, so that the connecting reinforcing bars ET1 and ET2 are directly fastened using the couplers 1 and 2 directly.

[0005] In this way, the couplers 1 and 2 are connected to the connecting reinforcing bars ET1 and ET2 by screwing and rotating the bolts and nuts to fasten them to each other, so the fastening work of the bolts and nuts is repeated, which means that problems will occur where the workability and constructability have to be partially sacrificed.

[0006] In addition, when the connecting reinforcing bars ET1 and ET2 are not located on the same central axis due to manufacturing errors and construction errors of the precast members PC1 and PC2, there are cases where it is impossible to insert and fasten the male coupler 1 to the female coupler 2. Since the couplers 1 and 2 are very expensive, there is a limit to ensuring economy.

[0007] Figure 1b illustrates an example of a connection construction using the enlarged head 20 of a conventional concrete member.

[0008] The concrete member may be manufactured as a precast member, or may be constructed by casting and curing in-situ concrete using a mold.

[0009] It can be seen that two adjacent concrete members can be connected to each other by setting the connecting reinforcing bars 10 in a "X" shape before casting the in-situ concrete and then casting the in-situ concrete.

[0010] At this time, it can be seen that the fixing performance of the end of the connecting reinforcing bar 10 can be increased by forming an enlarged head 21 around the end of the divided end 20 of the connecting reinforcing bar 10.

[0011] That is, although the connecting reinforcing bar 10 is used as a deformed reinforcing bar, it can be seen that a ring-shaped enlarged head 20 can be integrally formed in advance at the end 20 of the connecting reinforcing bar 10 in order to increase the frictional force while increasing the contact area with the concrete.

[0012] Figure 1c illustrates an example of a fixing device for a tendon installed in a conventional concrete member (such as a girder) and fixed to the concrete member.

[0013] The tendon is for introducing prestress into the concrete member. Such a tendon is usually made of a wire stronger than PC steel, and prestress is introduced by the reaction force after tensioning and fixing.

[0014] The fixing device 30 is for fixing a tensioned tension member to a concrete member.

[0015] Such a fixing device 30 has a fixing plate 31 and an anchor head 32 as its basic components.

[0016] The tension member 33 set to penetrate the fixing plate 31 will be fixed by a wedge (not shown) inserted into the through hole of the anchor head 32 after tensioning.

[0017] At this time, usually a large number of tension members 33 are installed, and when installed by the post-tensioning method, they will be installed inside the sheath 34.

[0018] In such a fixing process, since a considerable local stress will concentrate on the concrete member 35 when the fixing plate 31 comes into contact, it can be seen that the reinforcing bars 36 are integrally formed with the fixing head 37 inside the concrete member.

[0019] Therefore, it can be seen that the conventional method of using a coupler to simply directly connect the connecting bars to connect precast concrete members (precast members) to each other and then finish with finishing grouting can be used, and it can be seen that enlarged heads are formed on the connecting bars at intervals to ensure the fixing performance of the connecting bars.

[0020] When prestress is introduced by the tension member, it can be seen that the reinforcing bars 36 are formed in a spiral shape for reinforcement against the local stress caused by the introduced prestress, but it can be seen that such reinforcing bars 36 are only used as a means of concrete reinforcement by prestress introduction.

Summary of the Invention

Problems to be Solved by the Invention

[0021] Therefore, the present invention aims to solve the technical problem of providing a non-contact coupler that can connect coupling reinforcing bars in a non-contact manner while ensuring sufficient fixing performance required for connection, rather than the conventional method of mechanically connecting by contacting the direct coupling reinforcing bars to connect precast structures in a space (block-out part space S) exposed to the outside of each other.

[0022] In addition, the present invention aims to solve the technical problem of providing a non-contact coupler that can ensure workability and constructability while effectively resisting shear force and separation force at the connection joint surface by enhancing the restraint force around the coupling reinforcing bars when connecting the coupling reinforcing bars in a non-contact manner, enabling a quick and economical precast structure connection work, and a precast structure manufactured using the same.

Means for Solving the Problems

[0023] The non-contact coupler of the present invention for achieving the above object includes: coupling reinforcing bars respectively drawn out into the communicated block-out part spaces S of precast structures adjacent to each other; and a number of non-contact ring connection members arranged to surround the coupling reinforcing bars while being separated from each other around the adjacent and separated coupling reinforcing bars and filled in the block-out part space S. The non-contact ring connection members are embedded in the finishing grout filled in the block-out part space S, and the adjacent coupling reinforcing bars are connected to each other without a coupler by the frictional force generated.

[0024] In addition, a precast structure manufactured using the non-contact coupler of the present invention is a precast structure manufactured using one non-contact coupler having connecting reinforcing bars respectively drawn out into block-out part spaces S that communicate with each other adjacent to each other. In the precast structure, a large number of non-contact ring connecting members are arranged so as to surround the connecting reinforcing bars at intervals around the connecting reinforcing bars that are adjacent to each other and separated from each other, and so as to fill the block-out part space S; The non-contact ring connecting members are embedded in the finishing grout filled in the block-out part space S, and the connecting reinforcing bars adjacent to each other are connected to each other without a coupler by the frictional force generated thereby.

[0025] The method for constructing a precast structure manufactured using the non-contact coupler of the present invention includes: (a) a step of arranging precast structures each having connecting reinforcing bars drawn out into block-out part spaces S adjacent to each other so that the block-out part spaces S communicate with each other and the connecting reinforcing bars are separated from each other and adjacent to each other; (b) A large number of non-contact ring connecting members are arranged so as to surround the connecting reinforcing bars at intervals around the connecting reinforcing bars separated from each other, and so as to fill the block-out part space S. However, both horizontal channel body parts in which a large number of joining grooves are formed so that the left and right side surfaces of the non-contact ring connecting members set around both connecting reinforcing bars can be inserted are included, and a rib connector installed through the block-out part spaces S that communicate with each other adjacent to each other is used for installation.

Advantages of the Invention

[0026] According to the present invention, instead of directly connecting the connecting reinforcing bars exposed to the outside to each other by fastening force, the frictional force is effectively utilized by the finishing grouting filled in the block-out part space around the connecting reinforcing bars. However, since a head for reinforcing bars that can be formed in advance on the connecting reinforcing bars is used, workability and constructability for the connecting work of the connecting reinforcing bars can be effectively ensured.

[0027] In addition, the head for reinforcing bars can be pre-integrated with the connecting reinforcing bars, or can be installed on-site. However, by installing it in such a way that optimization for ensuring frictional force and fixing force is possible, the connection performance of precast structures can be maximized.

[0028] Moreover, according to the present invention, in addition to the head for reinforcing bars, a non-contact ring connecting member and a rib connector are further installed around the connecting reinforcing bars, and while restraining the cured finishing grouting around the connecting reinforcing bars, it is reinforced, and since simple installation work is possible, a non-contact coupler capable of quickly and economically connecting precast structures and a precast structure manufactured using the same can be provided.

Brief Description of the Drawings

[0029]

Fig. 1a

Fig. 1b

Fig. 1c

Fig. 2a

Fig. 2b

Fig. 3a

Fig. 3b

Fig. 4

Fig. 5a

Fig. 5b

Fig. 5c

Best Mode for Carrying Out the Invention

[0030] Connected reinforcing bars respectively drawn out into the communicating block-out part spaces S of adjacent precast structures; and a number of non-contact ring connecting members arranged so as to surround the connected reinforcing bars at intervals around the adjacent and mutually separated connected reinforcing bars and to fill the block-out part space S. The non-contact coupler is in its best mode such that the non-contact ring connecting members are embedded in the finishing grout filled in the block-out part space S, and the adjacent connected reinforcing bars are connected to each other without a coupler by the frictional force generated.

[0031] Hereinafter, embodiments of the present invention will be described in detail so that those having ordinary knowledge in the technical field to which the present invention pertains can easily implement it with reference to the attached drawings. However, the present invention can be embodied in various different forms and is not limited to the embodiments described here. And, parts not related to the description are omitted in order to clearly explain the present invention in the drawings, and similar reference numerals are given to similar parts throughout the specification.

[0032] Throughout the specification, when a certain part "includes" a certain component, this means that other components can be further included without excluding other components unless otherwise stated to the contrary.

[0033] [Non-contact Coupler 100 of the Present Invention]

[0034] Figure 2a is an exemplary drawing of the non-contact coupler 100 of the present invention, Figure 2b is an exemplary drawing of the rib connector 130 of the present invention, and Figures 3a and 3b are exemplary drawings of the head 110 for reinforcing bars of the present invention.

[0035] Referring to FIGS. 2a and 2b, the non-contact coupler 100 is structurally connected by installing a non-contact ring connecting member 120 and a rib connector 130 in the block-out space S around the connecting reinforcement 210 without directly contacting the connecting reinforcement 210 of the precast structure 200. Therefore, the name "non-contact" is used in that it eliminates the need for the operation of connecting the connecting reinforcement 210 itself to each other using a mechanical coupler or the like.

[0036] When connecting the connecting reinforcement 210 in such a non-contact manner, since the connecting reinforcement 210 is not directly connected to each other, the manufacturing errors and construction errors of the precast structure 200 can be absorbed, ensuring constructability and workability.

[0037] At this time, the precast structure 200 is prefabricated in a factory or the like and then transported to the site, and then the present invention structurally connects them to each other using the non-contact coupler 100, making it applicable to various precast structures 200 such as culverts and tunnels.

[0038] For this reason, as shown in FIGS. 2a and 2b, the non-contact coupler 100 is for connecting the connecting reinforcement 210 of the precast structure 200 to each other in a non-contact manner, and includes a head 110 for reinforcement, a non-contact ring connecting member 120, a rib connector 130, and a finishing grout 140.

[0039] First, the precast structure 200 is a reinforced concrete member prefabricated in a factory using a mold in advance, and a tension member (not shown) for prestress introduction may be further installed.

[0040] For example, it can be said to be a modular member for manufacturing and connecting various reinforced concrete structures such as culverts, underground and above-ground tunnels by the precast method for construction.

[0041] At this time, the precast structure 200 must be manufactured in a certain size for manufacturing, transportation, and construction.

[0042] To connect these on-site with each other, referring to Fig. 1a, the connecting reinforcing bars CR1, CR2 drawn out to the normal block-out part space S are connected to each other using couplers 1, 2, and the block-out part space S is finished with grout to connect the precast members PC1, PC2 to each other.

[0043] However, in the case of structural couplers, they are expensive, and when the central axes of the adjacent connecting reinforcing bars CR1, CR2 drawn out to the block-out part space S do not coincide with each other, it may be impossible to fasten them, so the construction and manufacturing errors of the precast members PC1, PC2 are inevitably affected.

[0044] Also, a constant torque for fastening the couplers 1, 2 must be introduced, but there may be cases where it is difficult to conduct quality control under on-site conditions.

[0045] Therefore, as shown in Fig. 2a, the present invention does not use the conventional couplers 1, 2 that require direct fastening of the adjacent connecting reinforcing bars 210 to each other,

[0046] and installs a non-contact ring connecting member 120 that is arranged to surround the connecting reinforcing bar 210 at intervals, and the non-contact ring connecting member 120 is also filled with the finishing grout 140 so as to be filled, thereby complementing the integration of the connecting reinforcing bar 210 by the fixing force due to the frictional force of the finishing grout 140.

[0047] Also, in order to facilitate setting while preventing the position of the non-contact ring connecting member 120 from fluctuating due to the finishing grout 140 filled in the block-out part space S, a rib connector 130 is installed.

[0048] Such a rib connector 130 is installed so as to penetrate the block-out part space S and also serves to ensure the connection performance at the connection joint surface of the precast structure 200.

[0049] 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 part space S so that such a reinforcing bar head 110 is filled, and the connecting reinforcing bars 210 are connected to each other by the fixing force due to friction.

[0050] Therefore, the reinforcing bar head 110 is formed in an enlarged head form that is formed so as to be in contact with both connecting reinforcing bars 210 of the precast structure 200 as shown in FIG. 2a.

[0051] It can be seen that such a reinforcing bar head 110 can be formed in a cylindrical block form while being in contact with the connecting reinforcing bar 210, and a large number of them are formed on each connecting reinforcing bar 210 while being separated from each other.

[0052] Such a reinforcing bar head 110 will be described with reference to FIGS. 3a and 3b as follows.

[0053] The reinforcing bar head 110 can be installed on the connecting reinforcing bar 210 in a welding type as shown in FIG. 3a or in a mechanical type as shown in FIG. 3b, so that workability and constructability can be sufficiently ensured.

[0054] At this time, the meaning of the welding type with the welded reinforcing bar head 110 is that the enlarged joint body 111 is fixed to the connecting reinforcing bar 210 by welding, and as shown in FIG. 3a, it includes the enlarged joint body 111, the end fixing device 112, and the enlarged joint part 113.

[0055] The enlarged joint body 111 is formed so that, for example, it can be divided into two parts as shown in FIG. 3a and installed in contact with the outer peripheral surface of the connecting reinforcing bar 210. This is such that an operator can easily assemble and install it on the outer peripheral surface of the connecting reinforcing bar 210 extending and protruding from the precast structure 200, and it includes the enlarged body part 111a, the end fixing part 111b, and the enlarged joint connecting part 111c.

[0056] First, as shown in Fig. 3a, the enlarged barrel part 111a can be installed so as to be divided into at least two parts and surround and contact the outer peripheral surface of the connecting reinforcing bar 210.

[0057] At this time, since the inner groove 111d for accommodating the joints and ribs of the connecting reinforcing bar 210 is formed on the inner surface at the part where the enlarged barrel part 111a and the connecting reinforcing bar 210 are in contact with each other, the operator can easily set the enlarged barrel part 111a at an arbitrary position and install the desired number of them. Then, the inner groove 111d is filled with the melted metal by welding so as to enable reliable fixed installation.

[0058] Next, as shown in Fig. 3a, the end fixing part 111b is integrally formed in a ring shape at both side ends of the enlarged barrel part 111a to ensure workability, and the end fixing device 112 described later is to be in contact with the outer peripheral surface.

[0059] Such an end fixing device 112 is for maintaining the temporarily combined form of the divided enlarged barrel parts 111a with each other, and can be removed after the enlarged barrel part 111a is fixedly installed by welding.

[0060] That is, the welded head 110 for reinforcing bars of the present invention ensures reliable fixed installation by welding (such as arc welding) the enlarged barrel part 111a to the connecting surface of the enlarged barrel part 111a divided on the connecting reinforcing bar 210 so that the melted metal (which may vary depending on the material of the welding rod, etc.) is filled in the inner groove 111d.

[0061] At this time, in order to fill the inner groove 111d with the melted metal, a welding hole through which the inner groove 111d is exposed can be formed in the enlarged joint barrel part 111, or a method of filling by welding using the gap between both ends of the enlarged joint barrel part 111 and the connecting reinforcing bar 210 can be used.

[0062] Next, as shown in Fig. 3a, the enlarged joint connecting part 111c serves as a fastening part formed on the outer peripheral surface between the fixing parts 111b at both side ends of the enlarged barrel part 111a, and is installed so that the enlarged joint part 113 can be detached and attached.

[0063] Such an enlarged joint connecting part 111c is formed with concave and convex parts continuously formed at the part in contact with the concrete as a fastening part, and it is possible to ensure basic adhesion. However, by additionally installing the enlarged joint part 113 described later on such an enlarged joint connecting part 111c, the adhesion area can be enlarged to improve the adhesion force, and it is also possible to adjust the finger pressure performance according to the direction.

[0064] Next, as shown in Fig. 3a, the end fixing device 112 is for fixing and installing the enlarged barrel part 111a of the enlarged joint barrel part 111 to the connecting reinforcing bar 210 by welding in a state where the enlarged barrel part 111a of the enlarged joint barrel part 111 is installed, and is formed, for example, in a ring shape having an inner surface corresponding to the outer peripheral surface of the end fixing part 111b.

[0065] Therefore, it serves to maintain the state in which the divided enlarged barrel parts 111a are aligned by setting the end fixing device 112 in contact with the end fixing part 111b, and the enlarged barrel part 111a is fixedly installed on the connecting reinforcing bar 210 by welding.

[0066] It is preferable that two such end fixing devices 112 are installed at both side ends of the enlarged joint barrel part 111. Although not shown in the figure, it is also possible to install only on one side end of the enlarged joint barrel part 111 as long as there is no problem in ensuring the adhesion force.

[0067] In addition, after the connecting reinforcing bar 210 penetrates through the end fixing device 112 in advance, the enlarged barrel part 111a is welded and fixedly installed to the connecting reinforcing bar 210 by welding (such as arc welding), and then it can be separated from the end fixing part 111b, and a ring-shaped one formed using an insulating material (such as ceramic) can be used.

[0068] Next, as shown in Fig. 3a, the enlarged joint part 113 is configured to be able to adjust the finger pressure performance according to the direction while additionally ensuring the adhesion force with the finishing grout 140 of the reinforcing bar head 110 installed on the connecting reinforcing bar 210.

[0069] That is, an enlarged joint connecting part 111c is formed as a screw fastening part on the outer peripheral surface of the enlarged joint body part 111a of the enlarged joint body part 111 detailed above. Basically, the adhesion force with the finishing grout 140 can be ensured by concave and convex parts,

[0070] but in order to expand the adhesion area and additionally ensure the adhesion force, the enlarged joint part 113 is additionally installed so as to be detachable from the enlarged joint connecting part 111c.

[0071] That is, it is installed in a ring form with a screw part formed on the inner surface fastened to the enlarged joint connecting part 111c so that it can be detached, and the enlarged joint body part 111 is installed in a form orthogonal to the connecting reinforcing bar 210 so that the finger pressure performance can be ensured.

[0072] Next, referring to Fig. 3b, the mechanical type reinforcing bar head 110 is the same as including the enlarged joint body part 111, the end fixing device 112, and the enlarged joint part 113 in comparison with the welded type reinforcing bar head 110. Here, the meaning of mechanical type is that the enlarged joint body part 111 is fixed by crimping by rotating and fastening the end fixing device 112 to the connecting reinforcing bar 210.

[0073] Therefore, the enlarged joint body part 111 is formed so as to be similarly divided into two parts as shown in Fig. 3b and installed to surround the outer peripheral surface of the connecting reinforcing bar 210. This is such that an operator can easily assemble and install it on the outer peripheral surface of the connecting reinforcing bar 210 extending and protruding from the precast structure 200, and it is the same as the welded type in including the enlarged body part 111a, the end fixing part 111b, and the enlarged joint connecting part 111c.

[0074] Therefore, the enlarged barrel portion 111a is formed to be similarly divided into at least two parts so as to surround the connecting reinforcing bar 210 as shown in Fig. 3b, and is installed so as to surround the outer peripheral surface of the connecting reinforcing bar 210, which is the same.

[0075] At this time, compared with the welded reinforcing bar head 110, the difference lies in that the part where the enlarged barrel portion 111a and the connecting reinforcing bar 210 are in contact with each other is formed to directly contact the joints and ribs of the connecting reinforcing bar 210 as they are, and no inner groove 111d is formed separately.

[0076] It can be seen that the enlarged barrel portion 111a is made of a crimpable material and can be finally crimped by the end fixing device 112 so as to directly contact the ribs and joints of the connecting reinforcing bar 210. As a result, the operator can easily set the enlarged barrel portion 111a at any position and install the desired number, which is the same.

[0077] As shown in Fig. 3b, the end fixing portion 111b is integrally formed at both side ends of the enlarged barrel portion 111a, and a screw portion is formed on the upper surface so that the end fixing device 112 does not simply contact.

[0078] In terms of the role that the end fixing device 112 crimps the end fixing portion 111b to the outer peripheral surface of the connecting reinforcing bar 210 while being integrated by screw fastening to integrate the enlarged barrel portion 111a with the connecting reinforcing bar 210, there is a difference from the welded reinforcing bar head 110 examined above.

[0079] As shown in Fig. 3b, the enlarged joint connecting portion 111c serves the same role of being installed so that the enlarged joint portion 113 can be detached as a fastening portion formed on the outer peripheral surface between the both side end fixing portions 111b of the enlarged barrel portion 111a.

[0080] In addition, the mechanical rebar head 110 of the present invention also serves a role in that the enlarged barrel portion 111a can be additionally compression-bonded mechanically to the connecting rebar 210 together with the end fixing portion 111b, and the enlarged joint portion 113 can be added by the enlarged joint connecting portion 111c. This is different from the welded rebar head 110 examined in detail above.

[0081] Such an enlarged joint connecting portion 111c is formed with concave and convex portions continuously formed at the portion in contact with the concrete as a fastening portion, and it is possible to ensure basic adhesion. By additionally installing the enlarged joint portion 113 on such an enlarged joint connecting portion 111c, the adhesion area is enlarged to improve the adhesion force, and it is the same that it is also possible to adjust the finger pressure performance depending on the direction.

[0082] Next, as shown in FIG. 3b, the end fixing device 112 is for fixedly installing the enlarged barrel portion 111a on the connecting rebar 210 in a state where the enlarged barrel portion 111a of the enlarged joint barrel portion 111 is installed, and is formed in a ring shape having an inner surface corresponding to the bent portion of the end fixing portion 111b.

[0083] However, there is a difference in that the end fixing device 112 is fastened to the fastening portion formed at the bent portion of the end fixing portion 111b by screw fastening, and the end fixing device 112 is rotated on the connecting rebar 210 to be compression-bonded to fixedly install the enlarged joint barrel portion 111 on the connecting rebar 210.

[0084] It is preferable to install two such end fixing devices 112 at both side ends of the enlarged joint barrel portion 111. Although not shown in the figure, it is the same that it is also possible to install only at one side end of the enlarged joint barrel portion 111 if there is no problem in ensuring the adhesion force.

[0085] In addition, after the connecting rebar 210 penetrates through the end fixing device 112 in advance, the enlarged joint barrel portion 111 is set, and the enlarged joint barrel portion 111 may be fixedly installed on the connecting rebar 210 by compression bonding, and it is preferably not separated and removed separately.

[0086] The enlarged joint portion 113 is the same in that, as shown in Fig. 3b, while additionally ensuring the adhesion to the concrete of the mechanical rebar head 110 installed on the connecting rebar 210, it is also possible to adjust the finger pressure performance according to the direction.

[0087] As described above in detail, an enlarged joint connecting 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. Basically, the adhesion to the finishing grout 140 can be ensured by concave and convex portions,

[0088] In order to expand the adhesion area and additionally ensure the adhesion, the enlarged joint portion 113 is installed so as to be detachable from the enlarged joint connecting portion 111c.

[0089] That is, it is installed in a ring form with a screw portion formed on the inner surface fastened to the enlarged joint connecting portion 111c so that it can be detached, and the enlarged joint portion 113 is installed in a form orthogonal to the connecting rebar 210 so as to ensure the finger pressure performance.

[0090] Next, as shown in Figs. 2a and 2b, the non-contact ring connecting member 120 is arranged so as to fill the block-out portion space S surrounding the connecting rebar 210 at intervals around the connecting rebar 210 and be filled with the finishing grout 140,

[0091] Thereby, the integration of the connecting rebar 210 is complemented by the fixing force due to the frictional force of the finishing grout 140.

[0092] It can be seen that such a non-contact ring connecting member 120 uses a circular ring form. That is, although the adjacent connecting rebars 210 are separated from each other, a large number of non-contact ring connecting members 120 can be arranged at intervals around the adjacent connecting rebars 210. Therefore, it serves to structurally connect the adjacent connecting rebars 210 by utilizing the frictional force with the finishing grout 140.

[0093] Although it is illustrated in a circular ring form, it can be arranged in the block-out part space S and can be formed in various forms as long as it can surround the connecting reinforcement 210.

[0094] When using a large number of non-contact ring connecting members 120 in the form of circular rings in this way, the contact area with the finishing grout 140 increases, and there is an advantage that existing products can be used as they are. For this reason, the outer peripheral surface of the circular ring can be coated with floss so that a large number of protrusions and the like can be naturally formed.

[0095] Therefore, when the operator sets a large number of them to be separated around the connecting reinforcement 210 on one side and the connecting reinforcement 210 on the other side is set adjacent to it, it is only necessary to set a large number of them to be separated from each other in the same way, so the workability is very excellent.

[0096] Next, as shown in FIGS. 2a and 2b, the rib connector 130 is installed in the block-out part space S at a constant interval quickly so that a large number of non-contact ring connecting members 120 in the form of circular rings can be installed. After being installed through the block-out part space S that communicates with each other adjacent to each other, it is filled in the finishing grout 140 to ensure the connection performance at the connection joint surface D of the precast structure 200 by frictional force.

[0097] According to FIGS. 2a and 2b, it can be seen that the horizontal channel body 131 in which a large number of joint grooves 132 are formed can be used so that the left and right side surfaces of the non-contact ring connecting member 120 in the form of a circular ring set around both connecting reinforcements 210 can be inserted.

[0098] The horizontal channel body 131 is in the form of a horizontal plate and is arranged such that two of them are spaced apart from each other, with both connecting steel bars 210 and a large number of non-contact ring connecting members 120 in the form of circular rings set therebetween. It is installed so as to cross the connecting joint surface of the precast structure 200, enabling it to effectively resist the shear force acting on the connecting joint surface of the precast structure.

[0099] By inserting and contacting both side surfaces of the non-contact ring connecting member 120 in the form of a circular ring between the two horizontal channel bodies 132, the joint groove 132 serves to fix the position of the non-contact ring connecting member 120 in the form of a circular ring.

[0100] According to FIG. 2c, it is formed in a semi-circular shape, an inclined semi-circular shape, an "L" - shaped locking tool shape, a trapezoidal shape, etc., such that the side surface of the non-contact ring connecting member 120 in the form of a circular ring is inserted and locked.

[0101] Therefore, it is preferable to first join and integrate the non-contact ring connecting member 120 in the form of a circular ring to the rib connector 130 and install the integrated one so as to surround the connecting steel bar 210. Needless to say, a large number of separated rib connectors 130 can be installed to be connected in the length direction. Since the joining of the side surfaces of the non-contact ring connecting member 120 in the form of a circular ring does not necessarily have to be installed with two separated from each other,

[0102] For example, two can be installed on one side and two corresponding to this can be installed on the other side. There is no particular limitation on the number of installations.

[0103] Next, as shown in FIGS. 2a and 2b, the finishing grout 140 is formed in the block-out part space S formed by communicating with each other at the connecting joint surface D of the precast structure 200, and serves to fill and finish the reinforcing bar head 110, the non-contact ring connecting member 120, and the rib connector 130 formed therein, and integrate them with each other.

[0104] Therefore, non-shrinking mortar, concrete, etc. may be used, and the head 110 for reinforcing bars, the non-contact ring connecting member 120, and the rib connector 130 will play a role of enabling the fixing performance and the integration of the precast structure 200 through frictional force.

[0105] [Precast structure 200 fabricated using the non-contact coupler 100 of the present invention]

[0106] FIG. 4 illustrates an exemplary view of a precast structure 200 fabricated using the non-contact coupler 100 of the present invention.

[0107] In FIG. 4, an L-shaped retaining wall is illustrated as the precast structure 200.

[0108] It can be seen that such an L-shaped retaining wall is formed by a bottom plate 230 and a wall body 240, and it can be seen that a large number of block-out part spaces S, which must horizontally and continuously connect the bottom plate 230 and the wall body 240, are formed at intervals in the vertical direction (the L-shaped retaining wall connection direction).

[0109] Connecting reinforcing bars 210 that must be connected to each other are exposed in the block-out part space S between the bottom plate 230 and the wall body 240.

[0110] The head 110 for reinforcing bars will be separately installed on-site on the connecting reinforcing bars 210. When using such heads 110 for reinforcing bars, the exposed extended length of the connecting reinforcing bars 210 can be minimized, so that a more effective connection operation of the connecting reinforcing bars 210 becomes possible.

[0111] Thereafter, after the heads 110 for reinforcing bars are respectively installed on the connecting reinforcing bars 210, the non-contact ring connecting member 120 will be installed at once using the rib connector 130.

[0112] Of course, they may be installed individually, but depending on the site conditions, installation at once enables rapid work.

[0113] It can be understood that such a non-contact ring connecting member 120 is set so that the rib connector 130 penetrates the connecting joint surface D.

[0114] Therefore, the final cast structure A is structurally connected to each other by placing and curing the finishing grout 140 in the block-out part space S so that the connecting reinforcing bars 210 where the rib connector 130 is installed and the non-contact ring connecting member 120 are filled.

[0115] [Construction method of precast structure 200 using the non-contact coupler 100 of the present invention]

[0116] FIGS. 5a, 5b and 5c illustrate a construction flowchart of a precast structure 200 manufactured using the non-contact coupler 100 of the present invention.

[0117] According to FIG. 5a, it can be seen that a precast structure 200 in which the reinforcing bar head 110 of the non-contact coupler 100 is installed on the connecting reinforcing bar 210 in advance at a factory or the like is manufactured and transported to the site, and construction is carried out so that the connecting joint surfaces D can be joined to each other in contact with each other.

[0118] The precast structure 200 is manufactured by connecting a large number of reinforced concrete members to each other and integrating them, and can be a final culvert or the like. A box-shaped block-out part space S is formed in advance so that the connecting reinforcing bars 210 can be structurally connected and integrated.

[0119] According to FIG. 5a, the block-out part spaces S of the precast structures 200 adjacent to each other communicate with each other, so that the connecting reinforcing bars 210 are on the same axis as each other and are installed to be connected using a conventional coupler. However, if they do not match due to construction errors or manufacturing errors, problems will occur.

[0120] The present invention enables the installation of the reinforcing bar head 110, non-contact ring connecting member 120, and rib connector 130 in a non-contact manner without using a coupler, and filling with finishing grout 140 so that the connecting reinforcing bars 210 can be connected to each other.

[0121] At this time, referring to FIG. 5a, it can be seen that the connecting reinforcing bar 210 is drawn out in the block-out portion space S of both precast structures 200, and it can be seen that the reinforcing bar head 110 is integrally formed on the outer peripheral surface of the connecting reinforcing bar 210.

[0122] As such a reinforcing bar head 110, as shown in FIGS. 3a and 3b, a welded or mechanical reinforcing bar head 110 can be used and formed to include an enlarged joint body 111, an end fixing device 112, and an enlarged joint portion 113.

[0123] Next, according to FIG. 5b, the non-contact ring connecting member 120 is arranged around the connecting reinforcing bars 210 using the rib connector 130 so as to be spaced apart and surround the connecting reinforcing bars 210 adjacent to each other.

[0124] Since the non-contact ring connecting member 120 is formed in a circular ring shape, it can be installed by being inserted into the connecting reinforcing bar 210, so the workability is very excellent, and a large number can be initially set so as to be spaced apart from each other.

[0125] Such a non-contact ring connecting member 120 can be dispersedly arranged throughout the communicated block-out portion space S and filled with the finishing grout 140, so that the integration of the connecting reinforcing bars 210 can be complemented by the fixing force due to the frictional force of the finishing grout 140.

[0126] At this time, the horizontal channel body 131 of the rib connector 130 is in the form of a horizontal plate and is set in two separated forms with both connecting reinforcing bars 210 and a large number of non-contact ring-shaped connecting members 120 in the form of circular rings in between, and is installed across the connecting joint surface of the precast structure 200 so as to be able to more effectively resist the shear force acting on the connecting joint surface of the precast structure. The joint groove 132 is formed between both horizontal channel bodies 131 so that both side surfaces of the non-contact ring-shaped connecting member 120 in the form of a circular ring are inserted and contacted, and as described above, it serves to fix the position of the non-contact ring-shaped connecting member 120.

[0127] Next, as shown in FIG. 5c, the finishing grout 140 is filled into the block-out part space S so that the connecting reinforcing bar 210 connected by the rib connector 130 and the non-contact ring-shaped connecting member 120 is filled and finally finished.

[0128] The finishing grout 140 using non-shrinking mortar, concrete, etc. is filled into the block-out part space S formed on the connecting joint surface D of the precast structure 200 and formed by communicating with each other so that the reinforcing bar head 110, the non-contact ring-shaped connecting member 120, and the rib connector 130 are filled. When finally cured, the fixing performance and the integration with the precast structure 200 are possible through the frictional force with the reinforcing bar head 110, the non-contact ring-shaped connecting member 120, and the rib connector 130.

[0129] The above description of the present invention is for illustrative purposes, and those with ordinary knowledge in the technical field to which the present invention belongs will be able to understand that it can be easily deformed into other specific forms without changing the technical idea and essential features of the present invention. Therefore, it should be understood that the embodiments described above are illustrative in all respects and not restrictive. For example, each component described in a single form may be implemented in a distributed manner, and similarly, the components described as being distributed may also be implemented in a combined form.

[0130] The scope of the present invention is shown by the claims described below rather than by the above detailed description, and all changes or modified forms derived from the meaning and scope of the claims and the concept of their equivalents should be construed as being included within the scope of the present invention.

Claims

1. Coupling reinforcing bars respectively drawn out to the communicated block-out part spaces S of precast structures adjacent to each other; and a number of non-contact ring coupling members arranged so as to surround the coupling reinforcing bars at intervals around the coupling reinforcing bars adjacent to each other and separated from each other while filling the block-out part space (S), wherein the non-contact ring coupling members are embedded in the finishing grout filled in the block-out part space (S), and the adjacent coupling reinforcing bars are coupled to each other without a coupler by the frictional force generated thereby. A non-contact coupler.

2. The non-contact ring coupling member (120) includes a circular ring, and a number of them are arranged at intervals around the coupling reinforcing bars (210), and protrusions can be further formed so as to increase the contact area with the finishing grout (140). The non-contact coupler according to Claim 1.

3. Including both horizontal channel body parts (131) in which a number of joining grooves (132) are formed so that the left and right side surfaces of the non-contact ring coupling member (120) set around both coupling reinforcing bars (210) can be inserted, and after being installed through the block-out part spaces (S) communicated adjacent to each other, further including a rib connector (130) that is embedded in the finishing grout (140) to ensure the coupling performance at the coupling joint surface of the precast structure (200) by frictional force. The non-contact coupler according to Claim 1.

4. A reinforcing bar head (110) is further installed on the coupling reinforcing bar (210), and the non-contact ring coupling member (120) is installed around the coupling reinforcing bar (210) on which the reinforcing bar head (110) is installed, and the reinforcing bar head (110) is embedded in the finishing grout (140) filled in the block-out part space (S), and the adjacent coupling reinforcing bars (210) are coupled to each other without a coupler by the frictional force generated thereby. The non-contact coupler according to Claim 1.

5. The reinforcing bar head (110) is An enlarged barrel portion (111a) that can be installed so as to surround the outer peripheral surface of the separated connected reinforcing bar (210); an end fixing portion (111b) that is integrally formed in a ring shape at both side ends of the enlarged barrel portion (111a) and is installed so that an end fixing device (112) contacts the upper surface; and an enlarged joint connecting portion (111c) in which an enlarged joint portion 113 is detachably formed as a fastening portion formed on the outer peripheral surface between both side end fixing portions (111b) of the enlarged barrel portion (111a); The non-contact coupler according to claim 4, comprising:

6. On the inner surface of the enlarged barrel portion (111a), an inner groove (111d) for accommodating the joints and ribs of the connecting reinforcing bar (210) is further formed at a portion where the enlarged barrel portion (111a) and the connecting reinforcing bar (210) are in contact with each other, and the inner groove (111d) is filled with metal melted by welding. The non-contact coupler according to claim 5, wherein the enlarged barrel portion (111a) is fixed to the connecting reinforcing bar (210) by welding so that the reinforcing bar head (110) adheres to the connecting reinforcing bar (210) by welding.

7. The enlarged joint connecting portion (111c) is formed with a continuous concave portion and convex portion at a portion in contact with the finishing grout (140) as a fastening portion so as to ensure adhesion, and an enlarged joint portion (113) is installed in the enlarged joint connecting portion (111c) as the fastening portion to expand the adhesion area, improve the adhesion force, and enable adjustment of the finger pressure performance according to the direction. The non-contact coupler according to claim 6.

8. The enlarged joint portion (113) is installed in a ring shape with a threaded portion formed on the inner surface fastened to the enlarged joint connecting portion (111c) so as to be detachable, and the enlarged joint barrel portion (111) is installed in a form perpendicular to the connecting reinforcing bar (210) to ensure finger pressure performance. The non-contact coupler according to claim 7.

9. The end fixing device (112) is fixed to the connecting reinforcing bar (210) by crimping, the end fixing device (112) is screwed and fastened to a fastening portion formed on the end fixing portion (111b), and the enlarged joint barrel portion (111) is crimped and fixed to the connecting reinforcing bar (210) by rotating the end fixing device (112) on the connecting reinforcing bar (210) so that the reinforcing bar head (110) adheres to the connecting reinforcing bar (210) by crimping. The non-contact coupler according to claim 7.

10. On the inner surface of the enlarged barrel part (111a), the enlarged barrel part (111a) and the connecting reinforcing bar (210) are formed such that the joints and ribs of the connecting reinforcing bar (210) are in direct contact. However, the enlarged barrel part (111a) is made of a material that can be crimped and is crimped to the final connecting reinforcing bar (210). In the enlarged joint connecting part (111c), a concave part and a convex part are continuously formed at the part in contact with the finishing grout (140) as a fastening part to ensure adhesion. An enlarged joint part (113) is installed in the enlarged joint connecting part (111c) which is the fastening part to expand the adhesion area and improve the adhesion force, and it is also possible to adjust the finger pressure performance according to the direction. The non-contact coupler according to claim 9.

11. In a precast structure manufactured using a single non-contact coupler having connecting reinforcing bars respectively drawn out into block-out part spaces (S) that are adjacent to and communicate with each other, a large number of non-contact ring connecting members are arranged while surrounding the connecting reinforcing bars at intervals around the connecting reinforcing bars that are adjacent and separated from each other so as to fill the block-out part spaces (S). The non-contact ring connecting members are embedded in the finishing grout filled in the block-out part spaces (S), and the connecting reinforcing bars adjacent to each other are connected to each other without a coupler by the frictional force generated. A precast structure manufactured using a non-contact coupler.

12. A reinforcing bar head (110) is further installed on the connecting reinforcing bar (210), and 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 part space (S), and the connecting reinforcing bars (210) adjacent to each other are connected to each other without a coupler by the frictional force generated. A precast structure manufactured using the non-contact coupler according to claim 11.

13. (a) A step of bringing precast structures each having connecting reinforcing bars drawn out into block-out part spaces (S) adjacent to each other so that the block-out part spaces (S) communicate with each other and the connecting reinforcing bars are separated from each other and adjacent to each other; (b) arranging a plurality of non-contact ring connecting members while surrounding the connecting reinforcing bars separated from each other and spaced apart around the connecting reinforcing bars so as to fill the block-out part space (S), including both horizontal channel barrel parts in which a plurality of joining grooves are formed so that the left and right side surfaces of the non-contact ring connecting members set around both connecting reinforcing bars can be inserted, and installing using a rib connector installed through the block-out part spaces (S) communicated with each other adjacent to each other; A precast structure construction method manufactured using a non-contact coupler, including the step of:

14. After the step (b), (c) a step of filling the finishing grout (140) filled in the block-out part space (S) with the non-contact ring connecting member (120) and the rib connector (130) so that the connecting reinforcing bars (210) adjacent to each other are connected to each other without a coupler by the frictional force generated by the embedding; A precast structure construction method manufactured using the non-contact coupler according to claim 13, further including the step of:

15. A reinforcing bar head (110) is further installed on the connecting reinforcing bar (210) in the step (a) so that the 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 finishing grout (140) filled in the block-out part space (S) is filled with the reinforcing bar head (110). The connecting reinforcing bars (210) adjacent to each other are connected to each other without a coupler by the frictional force generated by the embedding, and the reinforcing bar head (110) is installed so as to be divided and surround the outer peripheral surface of the connecting reinforcing bar (210). An enlarged barrel part (111a) that can be installed; an end fixing part (111b) formed integrally in a ring shape at both side end parts of the enlarged barrel part (111a) so that the end fixing device (112) contacts the upper surface; and an enlarged joint connecting part (111c) in which an enlarged joint part (113) is detachably formed as a fastening part formed on the outer peripheral surface between both side end fixing parts (111b) of the enlarged barrel part (111a); A precast structure construction method manufactured using the non-contact coupler according to claim 13, including the step of:

16. The precast structure (200) in the step (a) is a reinforced concrete member manufactured in advance using a mold, including a culvert, underground and above-ground tunnels, and enabling uncoupled connection by the non-contact coupler 100 even when the connecting reinforcing bars (210) separated from each other are not on the same central axis. A method for constructing a precast structure using the non-contact coupler according to claim 13.

Images