KR20100111883A - Method for constructing beam reinforced concrete in delay joint sections by using coupler - Google Patents

Abstract

PURPOSE: A construction method for a beam steel bar in a delay joint section using a coupler is provided to prevent cracking in a beam due to the dry shrinkage of concrete, since the coupler is re-coupled before filling concrete in a delay joint section. CONSTITUTION: A construction method for a beam steel bar in a delay joint section using a coupler comprises following steps. A mold is installed. A pre-concrete placing slab and a pre-concrete placing beam are formed by the placing of concrete after a slab steel bar and a first beam steel bar are arranged. The mold is installed on the side of the pre-concrete placing slab and the pre-concrete placing beam. A slab steel bar and a second slab steel bar are arranged, a first beam steel bar(110) and a second steel bar(120) are connected by a coupler(130), and then concrete is poured for the formation of the post-concrete placing slab and the post-concrete placing beam.

Description

METHODS FOR CONSTRUCTING BEAM REINFORCED CONCRETE IN DELAY JOINT SECTIONS BY USING COUPLER}

The present invention relates to a method of constructing a prosthesis of a delay joint section using a coupler, and in detail, after fastening the prosthesis of the slab to be post-installed using a coupler to the prosthesis of the pre-slabed slab The present invention relates to a method of reinforcing reinforcement of a delay joint section using a coupler to release the coupler before curing the poured slab and to refit the coupler again before filling concrete in the delay joint section.

In general, there is an increasing number of constructions using delay joints to relieve stress due to inequality when joining new and old slabs during remodeling.

In addition, the slab construction of the main integrated underground parking lot is usually cut into construction joints using formwork or metal laths, but it absorbs the dry shrinkage of the slab post-installation section by the main part and binding force from the post-casting slab section. Since the cracks are more likely to occur, and through cracking leads to a higher risk of leakage, there is an increasing number of applications using a delay joint as an alternative.

When using a delay joint, the most important factor is whether the slab and the reinforcing bar are cut. In general, all slab reinforcing bars are cut, and the prosthetic bar has a great effect on workability depending on whether or not to cut the prosthetic bar.

However, when the prosthetic reinforcement is not cut, there is a problem in that the crack is generated in the beam by the concrete dry shrinkage, and there is a problem in that the stress of the reinforcement is increased by the concrete dry shrinkage.

The present invention is to solve the problems as described above, after coupling the prosthetic reinforcement of the slab to be post-installed using a coupler to the prosthetic reinforcement of the pre-installed slab after placing the concrete coupler before curing of the post-installed slab Provides a method of prosthetic reinforcement for delay joint sections using a coupler to prevent stress from occurring and to re-join the coupler before filling concrete in the delay joint section to prevent cracks in the beam due to concrete shrinkage Its purpose is to.

Features of the present invention for achieving the above object,

A preliminary placing process of installing the formwork, reinforcing the slab reinforcing bars and the first reinforcing bars, and then placing concrete to form the precast slab and the precast beam; Forming the formwork on the side of the first placing slab and the first placing beams, except the delay joint section spaced from the first placing slab and the first placing beams, and reinforce the slab reinforcement and the second reinforcing bar, the first reinforcing bar A post-installation process of forming a post-pouring slab and a post-pouring beam by jointing the second reinforcing bar with a coupler and then pouring concrete; A prosthetic joint release step of releasing the coupling of the coupler before full curing of the post-pouring beam to prevent stress between the first and second prosthesis; And a delay joint filling process of connecting concrete to the delay joint section immediately after fastening the coupler after a predetermined period of time and connecting the pre-pouring slab and the post-pouring slab and the pre-pouring beam and the post-pouring beam.

Here, the coupler is a screw joint type or a single joint type.

Here, the first prosthesis and the second prosthesis is a threaded portion is formed at one end so that the screwed coupler is screwed.

Here, the screw joint type coupler is a connecting prosthesis having threaded portions formed at both ends for ease of fastening when the delay joint section is wide when the coupler is re-fastened, and the first prosthesis and the second coupler using two couplers. Tighten the prosthesis.

Here, the thread processing portion of the first prosthesis or the second prosthesis is formed longer than the length of the thread processing portion of the second prosthesis or the first prosthesis, the coupler when releasing the screw joint type coupler To completely move toward the first or second prosthesis.

Here, the first prosthesis and the second prosthesis have a length at which the ends are spaced apart from each other when fastened by the coupler to prevent stress transmission by contact.

Here, the lock nut for pressing the screw joint type coupler is further provided to prevent cracking due to the play of the first or second prosthetic reinforcement.

Here, the prosthetic reinforcement joint release step to release the screw coupling portion of the first prosthetic reinforcement and the second prosthetic reinforcement after releasing the coupling.

According to the method of construction of the prosthetic reinforcement of the delay joint section using the present invention coupler configured as described above, after fastening the reinforcement of the slab to be post-installed using the coupler to the reinforcement of the pre-placed slab after pouring concrete The stress is prevented by releasing the coupler before curing of the poured slab, and the coupler is re-fastened again before the concrete is filled in the delay joint section to prevent cracks in the beam due to the shrinkage of the concrete.

Hereinafter, with reference to the accompanying drawings a method of constructing a prosthesis of the delay joint section using a coupler according to the present invention will be described in detail.

In the following description of the present invention, if it is determined that a detailed description of a related known function or configuration may unnecessarily obscure the subject matter of the present invention, the detailed description thereof will be omitted. Terms to be described later are terms defined in consideration of functions in the present invention, and may vary according to intentions or customs of users and operators. Therefore, the definition should be based on the contents throughout this specification.

1 is a perspective view showing a configuration of a coupler and a prosthesis applied to a method of constructing a prosthetic reinforcement of a delay joint section using a coupler according to the present invention, FIG. 2 is a cross-sectional view of FIG. 1, and FIGS. 7 is a perspective view illustrating a configuration of a coupler and a prosthesis applied to a prosthesis construction method of a delay joint section using a coupler according to an embodiment, and FIGS. 7 to 10 are beams of a delay joint section using a coupler according to the present invention. It is a process chart to explain the method of constructing rebar.

1 to 10, in the method of constructing the prosthetic reinforcement of the delay joint section using the coupler according to the present invention, a formwork (not shown) is installed, and the first placing slab reinforcement 101 and the first prosthetic reinforcement 110 are installed. After placing the concrete to place the pre-pouring slab 102 and the pre-pouring beam 103 to form a pre-pouring slab (S100); Formwork (not shown) is installed on the sides of the pre-stacking slab 102 and the pre-casting beam 103, except for the delay joint section DJ spaced a predetermined distance from the pre-stacking slab 102 and the pre-casting beam 103. Reinforce the post-installation slab reinforcement 104 and the second prosthesis 120, but after the first prosthesis 110 and the second prosthesis 120 are joined using the coupler 130, the concrete is poured. A post pour process (S110) for forming a post pour slab 105 and a post pour beam 106; Prosthetic bar joint release step (S120) of releasing the coupling of the coupler 130 before the complete curing of the post-pouring beam 106 to prevent the stress between the first reinforcement 110 and the second reinforcement (120); And when the drying contraction of the post-pouring slab 105 and the post-pouring beam 106 is completed after a predetermined period of time, the coupler 130 is re-fastened and the concrete is filled in the delay joint section (DJ). 102 is a delay joint filling process (S130) for connecting the post-pouring slab 105 and the pre-pouring beam 103 and the post-pouring beam 106.

On the other hand, the method of prosthetic reinforcement of the delay joint section using the coupler according to the present invention according to the present invention with reference to the drawings in more detail for each process as follows.

`` Pasting process: S100 ''

First, when remodeling, when constructing slabs using delay joints, such as joining of old and new slabs and slabs of main integrated underground parking lot, divide the certain sections into pre-pouring and post-pouring sections, and between the pre-pouring section and the post-pouring section. Form a delay joint section.

That is, formwork is installed in order to construct the first placing slab and the first placing beam, and after placing the first placing slab reinforcement 101 and the first reinforcing bar 110 in the corresponding section, the concrete is poured by placing the first placing slab 102 and A first place beam 103 is formed.

At this time, the pre-slab slab 101 and the first prosthetic reinforcement 110 are exposed to the delay joint section DJ, and the end of the first prosthetic reinforcement 110, that is, the portion exposed to the delay joint section DJ. At the end, a thread processing part 111 is formed.

`` Foot casting process: S110 ''

When curing of the pre-stacking slab 102 and the pre-pouring beam 103 is completed, formwork is installed to construct the post-pouring slab 105 and the post-pouring beam 106, and the post-pouring slab reinforcing bar ( 104) and the second prosthesis 120 is reinforced.

At this time, the post-installation slab reinforcement 104 and the second prosthesis 120 are exposed to the delay joint section DJ, and the end of the second prosthesis 120, that is, the portion exposed to the delay joint section DJ. At the end is formed a screw machining portion 121.

In addition, the first prosthesis 110 and the second prosthesis 120 has a length (L1) that is spaced apart from each other at the ends thereof when fastened by the coupler 130 to prevent stress transfer by contact, The length L2 of the thread machining portion 121 of the second prosthesis 120 is formed longer than the length L1 of the thread machining portion 111 of the first prosthesis 110 so as to fasten the coupler 130. When the coupling is released, the coupler is completely moved to the second prosthesis 120 side. On the contrary, the length L1 of the thread processing part 111 of the first prosthesis 110 may be longer than the length L2 of the thread processing part 121 of the second prosthesis 120.

When the reinforcement is completed, the thread processing unit 111 of the first prosthesis 110 and the thread processing unit 121 of the second prosthesis 120 are fastened to each other through the coupler 130.

At the same time, when the first prosthesis and the second prosthesis are jointed, the first placing slab reinforcement 101 and the post placing slab reinforcing bar 104 exposed to the delay joint section DJ may be overlapped.

At this time, when the coupler is re-joined, when the delay joint section (DJ) is wide, two couplers (using the connecting prosthesis 140 formed with thread processing parts 141 at both ends as shown in FIG. 3 for ease of fastening) 130 may be used to fasten the first prosthesis 110 and the second prosthesis 120.

In addition, the screw processing unit 141 of the second prosthesis 120, as shown in FIG. 4, the coupler 130 to prevent cracking due to the play between the first prosthesis 110 and the second prosthesis 120. The lock nut 131 may be further provided, and the lock nut 131 may be formed on the longer side of the first prosthesis 110 or the second prosthesis 120.

In addition, the coupler 130 may be a knitted joint coupler (ie, a method of not forming a threaded portion on the prosthesis and connecting by using a knitted body) instead of a screwed joint as shown in FIGS. 5 and 6. have.

Then, when the joint of the first prosthesis 110 and the second prosthesis 120 is completed, the concrete is poured to form the post-pouring slab 105 and the post-pouring beam 106.

《Prosthetic Rebar Joint Release Process: S120》

Then, the coupler 130 at the time of complete curing (after about 12 hours after the concrete is cast) of the post-pouring beam 106 to prevent the stress between the first and second reinforcing bars 110 and 120. Rotating the coupler 130 is completely moved to the second prosthesis 120 side to release the joint of the first prosthesis 110 and the second prosthesis 120. At this time, the coupler is moved to the second prosthesis 120 side, and then foreign matter is attached or rusted to the thread processing unit 111 of the first prosthesis 110 and the screw processing unit 121 of the second prosthesis 120. In order to prevent the occurrence of the tape, a cloth or a cap is used to provide the threaded portion 111 of the first prosthesis 110 and the threaded portion 121 of the second prosthesis 120.

《Delay Joint Filling Process: S130》

Then, after a certain period of time (approximately 4-6 weeks), the coupler 130 is used to rejoin the first and second prosthetics 110 and the second prosthesis 120, and then the concrete is placed in the delay joint section DJ. The filling is completed by connecting the pre-pouring slab 102 and the post-pouring slab 105 and the pre-pouring beam 103 and the post-pouring beam 106 to complete the construction.

As those skilled in the art would realize, the described embodiments may be modified in various ways, all without departing from the spirit or scope of the present invention. It is to be understood, however, that the present invention is not limited to the specific forms referred to in the description, but rather includes all modifications, equivalents, and substitutions within the spirit and scope of the invention as defined by the appended claims. Should be.

1 is a perspective view showing a configuration of a coupler and a prosthesis applied to a method of constructing a prosthesis of a delay joint section using a coupler according to the present invention;

2 is a cross-sectional view of FIG.

3 to 6 is a view showing the configuration of the coupler and the prosthesis applied to the prosthetic construction method of the delay joint section using a coupler according to another embodiment of the present invention,

7 to 10 is a process chart for explaining the prosthesis construction method of the delay joint section using a coupler according to the present invention.

<Explanation of symbols on main parts of the drawings>

101: reinforcement slab reinforcement 102: reinforcement slab

103: Strut casting 104: Reinforced slab rebar

105: post-installation slab 106: post-installation beam

110, 120: 1st, 2nd reinforcing bar 111, 121: thread processing part

130: coupler 131: lock nut

Claims (8)

A preliminary casting process of installing the formwork, reinforcing the slab reinforcing bars and the first reinforcing bars, and then placing concrete to form the precast slab and the precast beam; Forming the formwork on the side of the first placing slab and the first placing beams, except the delay joint section spaced from the first placing slab and the first placing beams, and reinforce the slab reinforcement and the second reinforcing bar, the first reinforcing bar A post-installation process of forming a post-pouring slab and a post-pouring beam by jointing the second reinforcing bar with a coupler and then pouring concrete; A prosthetic joint release step of releasing the coupling of the coupler before full curing of the post-pouring beam to prevent stress between the first and second prosthesis; And A coupler comprising a delay joint filling process for connecting a pre-slab slab, a post-slab slab, a pre-pour beam and a post-pour beam by filling concrete in the delay joint section immediately after reconnecting the coupler after a certain period of time. Construction method of prosthetic reinforcement of used delay joint section. The method of claim 1, The coupler is, Prosthetic reinforcement method of the delay joint section using a coupler, characterized in that the screw joint method or a knitted joint method. The method of claim 2, The first prosthesis and the second prosthesis, Prosthesis construction method of the delay joint section using a coupler, characterized in that the screw processing portion is formed at one end so that the screw joint coupler is screwed. The method of claim 3, wherein The screw joint type coupler, Coupler for connecting the first and second prosthetic reinforcement by using two couplers and a connecting prosthesis having a threaded portion formed at both ends for ease of fastening when the delay joint section is wide when the coupler is refastened. Prosthesis construction method of delay joint section using The method of claim 2, Thread processing part of the first or second reinforcing bar, It is formed longer than the length of the thread processing portion of the second prosthesis or the first prosthesis, so that the coupler is completely moved to the first prosthesis or the second prosthesis side when releasing the fastening of the screw joint coupler Prosthesis construction method of delay joint section using a coupler. The method of claim 5, In the thread processing part of the first or second reinforcement, And a lock nut for press-fitting the screw-coupled coupler to prevent cracking by the play of the first or second prosthetic reinforcing bars. The method of claim 1, The first prosthesis and the second prosthesis, Prosthesis construction method of the delay joint section using a coupler, characterized in that the end has a length that is spaced apart from each other when fastened by the coupler to prevent stress transfer by contact. The method of claim 3, wherein The prosthetic reinforcement joint release process, Prosthesis reinforcement method of the delay joint section using a coupler characterized in that to maintain the threaded portion of the first prosthesis and the second prosthesis after releasing the fastening of the screw joint type coupler.

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