KR101715199B1 - Sheath connecting member and precast prestress concrete structure construction method therewith - Google Patents

Sheath connecting member and precast prestress concrete structure construction method therewith Download PDF

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Publication number
KR101715199B1
KR101715199B1 KR1020150073506A KR20150073506A KR101715199B1 KR 101715199 B1 KR101715199 B1 KR 101715199B1 KR 1020150073506 A KR1020150073506 A KR 1020150073506A KR 20150073506 A KR20150073506 A KR 20150073506A KR 101715199 B1 KR101715199 B1 KR 101715199B1
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KR
South Korea
Prior art keywords
sheath
concrete structure
precast concrete
precast
sealing member
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KR1020150073506A
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Korean (ko)
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KR20160139146A (en
Inventor
이상윤
송재준
이정미
황윤국
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한국건설기술연구원
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Priority to KR1020150073506A priority Critical patent/KR101715199B1/en
Publication of KR20160139146A publication Critical patent/KR20160139146A/en
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    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C5/00—Reinforcing elements, e.g. for concrete; Auxiliary elements therefor
    • E04C5/08—Members specially adapted to be used in prestressed constructions

Abstract

It is possible to effectively connect the adjacent sheaths provided on the precast prestressed concrete structure continuously on the connecting portion and effectively seal the filling material filled in the connecting portion by using the sealing member and to precisely secure the spacing space of the precasted prestressed concrete structure And a method of constructing a precast concrete structure using the same.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a sheath connecting member and a precast concrete structure using the sheath connecting member,

The present invention relates to a sheath connecting member and a method of constructing a precast concrete structure using the same. More specifically, it is possible to effectively connect the adjacent sheaths provided on the pre-cast prestressed concrete structure continuously on the connecting portion, effectively seal the filling material filled in the connecting portion by using the sealing member, and prevent the spacing of the precast prestressed concrete structure And a method of constructing a precast concrete structure using the same.

FIG. 1 shows a connection method of the sheath 33 in a precast concrete structure such as a PSC girder.

The PSC girder A is arranged such that a PC steel wire penetrating the PSC girder in the longitudinal direction passes through the upper portion of the continuous focal point portion in a state where the PSC girder A is adjacent to each other at a continuous focal point such as a pier.

The PC steel girder 31 penetrating the PSC girder in the longitudinal direction is inserted into the sheath 33 disposed in advance in the PSC girder. The PC steel girder is connected to the continuous sheath 11 And the continuous point portion sheath 11 is connected to the sheaths 33 previously arranged on the PSC girder.

At this time, if the sheath 33 and the continuous portion sheath 11 are not tightly connected to each other, the filling material will have to permeate into the sheaths when the filling material such as concrete or mortar is placed thereafter.

As shown in FIG. 1, a work space (B, a kind of notched portion) for connecting a sheath is separately formed on the upper portion of the PSC girder, and the continuous portion side sheath 11 is manually connected. In this case, There is a problem in that it takes a lot of time and effort to connect the continuous-point portion sheath 11.

Further, when the work space (B) can not be secured, sealing may be performed using a material such as styrofoam. Because the styrofoam has a low adhesive force or a low strength of the material, the styrofoam is dropped in the process of filling the filler. There is a problem that a large amount of filler can leak.

When the filling material leaks into the sheath and becomes hardened, it interferes with the insertion of the PC steel wire into the sheath, and there is a discontinuous interface with the mortar and the like which is filled in the sheath. Therefore, it is difficult to precisely introduce the prestress due to the tension and fixing of the PC steel wire Lt; / RTI >

Accordingly, it is possible to secure the connection interval more quickly and stably at the connection site of the precast concrete structure, and to easily connect the adjacent sheath at the connection site, and at the time of filling the connection site with the filler The present invention has been made in view of the above problems, and it is an object of the present invention to provide a sheath connecting member and a method of constructing a precast prestressed concrete structure using the sheath connecting member capable of efficiently performing precast prestressed concrete structure.

In order to achieve the above object,

First, a sheath connecting member capable of easily connecting neighboring sheaths while stably setting precast concrete structures at regular intervals is provided.

The sheath connecting member includes a sheath penetrating portion inserted into the inner surface of the adjacent sheath and an extended head portion formed along the outer peripheral surface of the one end of the sheath penetrating portion.

The sheath connecting member is inserted into the sheath like a rubber stopper so that the extended head is disposed around the sheath to adjust the spacing of the adjacent precast concrete structures by the thickness of the extended head.

Secondly, the sheath penetration portion of the sheath connecting member is formed so as to be thinner in the longitudinal direction so as to be closely attached to the inner surface of the sheath by penetrating the sheath, so that the connecting portion between the sheath- So that the durability of the connection portion can be ensured.

Thirdly, protrusions due to the formation of grooves are formed in the back surface and the front surface of the extension head, thereby ensuring sufficient adhesion to the connection end surface of the precast concrete structure and facilitating deformation of the rubber head. It is possible to sufficiently secure the adhesion performance with the concrete connection end face that is not smoothly finished.

Fourthly, the inner diameter of the extension head has a tapered inner diameter increasing from the inner side to the outer side, and the outer diameter is formed to be larger than the sheath diameter of the adjacent precast concrete structure. Thus, when the PC steel wire is inserted into the sheath, The PC steel wire is prevented from being clogged by the step of the adjacent precast concrete structure.

Fifth, the connection end faces of the precast concrete structures are processed into shear keys and shear grooves to fill the filler materials such as mortar and concrete. In order to seal them, a sealing groove is formed in the lower connection end face of the precast concrete structure, Is fixed to the sealing groove.

The sealing member is formed of a rubber material so that one side of the sealing member can be inserted into the opening groove. Also, the sealing groove and the connecting end face may not be smooth and may not be closely contacted. So that an intermediate notched groove can be formed. Thus, deformation and restoration that can be easily inserted into the sealing groove can be achieved.

The sheath connecting member according to the present invention and the precast prestressed concrete structure construction method using the sheath connecting member according to the present invention greatly facilitate the connection of the adjacent precast prestressed concrete structures to sheathing. Even if the precast prestressed concrete structures are stepped due to a construction error, So that the insertion of the PC steel wire into the sheath does not occur.

The sheath connecting member is simple to install and mount in the sheath with a rubber material and is easy to install and can closely adhere to the adjacent precast concrete structures. The sheath connecting member has a function of precisely spacing the precast concrete structure and connecting the sheath And it is also possible that the filling material is not stuck to the inside of the sheath, thereby making it possible to connect the precast precast concrete structure more efficiently.

Further, by using a sealing member together, it is possible to more effectively seal the sealing portion of the sheath connecting portion.

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is an installation view of a sheath connecting member of a conventional precast prestressed concrete structure (girder)
FIGS. 2A and 2B are an exploded perspective view and an installation sectional view of the sheath connecting member of the present invention,
3 is a perspective view and an installation perspective view of a sealing member of the present invention,
FIGS. 4A, 4B, 4C, and 4D are flowcharts of a method of constructing a precast concrete structure using a sheath connecting member and a sealing member.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings, which will be readily apparent to those skilled in the art. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. In order to clearly illustrate the present invention, parts not related to the description are omitted, and similar parts are denoted by like reference characters throughout the specification.

Throughout the specification, when an element is referred to as "comprising ", it means that it can include other elements as well, without excluding other elements unless specifically stated otherwise.

[Sheath connecting member 100 of the present invention]

2A and 2B are an exploded perspective view and an installation perspective view of the sheath connecting member 100 of the present invention.

The sheath connecting member 100 has a function of connecting the sheaths 210 previously installed in the precast prestressed concrete structures 200a and 200b adjacent to each other and having the connecting end faces 240 separated from each other,

A function of setting the pre-cast prestressed concrete structures 200a and 200b to have a spacing space S1,

And has a function of preventing the filler material 400 from permeating into the interconnected sheath 210.

The sheath connecting member 100 includes a sheath penetration part 110 and an extension head part 120 formed along the outer peripheral surface of the one end of the sheath penetrated part as shown in FIG. The extension 110 is installed inside the sheath 210 so that the extension head 120 is connected to the connection end surface 240 of the sheath 210 such that the one side 121 is in contact with the sheath 210. [

The inner diameter d1 of the sheath penetration portion 110 is equal to the diameter of the sheath 210 so that the inner diameter d1 is the same but the outer diameter d2 of the sheath penetration portion 110 And is formed so as to become smaller.

The outer diameter d2 of the distal end of the sheath penetration part 110 is smaller than the diameter d4 of the extended head connection part so that the penetration is easy and the inner diameter of the sheath 210 can be reliably adhered.

Since the diameter of the sheath 210 which is usually used is determined, the inner and outer diameters of the sheath penetration part 110 are determined on the basis of the determined diameter. The sheath may be formed as a thin corrugated tube and may be deformed. I.e., the tapered outside diameter d3, the thickness of which is reduced.

Thus, the inner diameter d1 is maintained at the same diameter so as not to interfere with the PC stranded wire insertion.

Since the sheath-penetrated portion 110 is made of a rubber material and has elasticity, it can be stably attached to the sheath.

The extension head 120 is an annular head of a rubber material integrally formed at the tip of the sheath penetration part 110 and is set so that the one side surface 121 is in contact with the connection end surface 240.

The extension head 120 has a diameter larger than the outer diameter of the sheath penetration portion 110 and has a constant thickness T so that the spacing of the precast concrete structures 200a and 200b can be adjusted according to the thickness .

When the precast concrete structures 200a and 200b are initially set using a chain block or the like and then the precast concrete structures 200a and 200b are set to contact the extended head 120, So that it can be easily adjusted.

At this time, grooves are formed in the one side surface 121 and the other side surface 122 to form the protrusions 123. The protrusions 123 are in contact with the connection end surface 240 as shown in FIG. 2B, Even if the electrode 240 is formed so as not to be smooth, the contact area can be widened and the adhesion performance can be improved.

The inner diameter of the extension head 120 is formed to have a tapered inner diameter d3 that increases toward the sheath 210 of the adjacent precast concrete structures 200a and 200b.

The inner diameter d4 of the other side wall 122 of the extended head 120 is formed to be larger than the diameter of the sheath 210 of the adjacent precast concrete structures 200a and 200b, It can be seen that it is prevented from being caught inside the sheath connecting member 100 when it is inserted.

It can be seen that, even if a step due to a construction error or the like occurs when setting the precast concrete structures 200a and 200b adjacent to each other, that is, even if the central axes of the sheath are not present on the same straight line, the PC stranded wire can be easily installed.

As a result, the extended head part 120 is formed so that one side surface and the other side surface are in contact with the connection end surface of the adjacent precast concrete structures 200a and 200b to secure the connection space S of adjacent sheaths as shown in FIG. 2B As shown in FIG. 3, even if the filler material 400 is filled in the spacing space of the precast concrete structures 200a and 200b, the filler material 400 does not penetrate into the sheath.

[Sealing member (500) of the present invention]

Fig. 3 shows an installation cross-sectional view of the sealing member 500 of the present invention.

Referring to FIG. 3, the precast concrete structures 200 are formed to be spaced apart from each other to form a spacing space S1. The sheath connecting member 100 is installed in the spacing space, It can be seen that the front end groove 220 is formed in the connection end face 240.

The shear grooves 220 and the spacing space S1 are filled with the filler material 400 to form the adjacent precast concrete structures 200 integrally with each other.

The filler material 400 is filled in the upper part of the spacing space S1. If the lower part of the connection end face of the precast concrete structure 200 is not blocked, the filler material 400 is forced to leak.

A sealing member 500 for preventing leakage of the filler 400 is provided. Since the sealing member 500 is installed between the connection end faces, the block member is made of a rubber material so as to be installed with elasticity.

Since the sealing function is inevitably deteriorated if the sealing member 500 is simply installed, the sealing groove 230 is formed below the connection end surface 240 of the precast concrete structure 200, Only one side of the sealing member 500 is fitted and fixed to the base 230.

That is, the sealing member 500 may be formed of a rubber material so that one side of the sealing member 500 can be inserted into the sealing groove 230, and the sealing groove and the connecting end face may not be closely contacted, The protrusions 520 are formed on one side surface and the other side surface 510 which are in contact with the end surfaces by forming grooves, and in particular, an intermediate notch groove 530 (a through groove extending from one side outer surface to the middle portion) So that deformation and restoration that can be easily inserted into the sealing groove can be performed.

The sealing member 500 sufficiently exhibits its installation and sealing functions and contributes to the integration of the precast concrete structures 200a and 200b.

[Construction method of precast prestressed concrete structure using the sheath connecting member and sealing member of the present invention]

4A, 4B, 4C, and 4D show a flowchart of a method of constructing the precast concrete structures 200a, 200b using the sheath connecting member 100 and the sealing member 500. FIG.

First, the precast concrete structures 200a and 200b may be precast decks, beam members, or the like and may be girders for bridges.

The precast prestressed concrete structures 200a and 200b are provided with a sheath 210 therein and the precast prestressed concrete structures 200a and 200b can be manufactured to have a certain size for manufacturing,

The PC stranded wire 300 is inserted into the sheath 210 to tense and fix both ends so that the prestressed concrete structures 200a and 200b are pressed together while introducing the prestress.

However, since the connecting portions of the precast concrete structures 200a and 200b are set to form the spacing space S1, it is not easy to set a certain spacing space S1 even if a chain block or the like is used. no.

As shown in FIG. 2A, the pre-cast prestressed concrete structures 200a and 200b are initially set adjacent to each other, and then the sheath connecting member 100 is inserted into the sheath 210.

The sheath penetration portion 110 is closely fitted to the inner surface of the sheath so that the expansion head portion 120 can be brought into close contact with the connection end surface 240 also.

In addition, the sealing member 500 previously installed in the sealing groove 230 formed in the lower portion of the connection end face 240 of the precast concrete structures 200a and 200b is installed.

Next, as shown in FIG. 4B, the connection end surface 240 of the precast concrete structure 200b without the sheath connecting member 100 is set to contact with the other side surface of the extended head 120, The other side surface of the sealing member 500 is also set to contact the connection end surface 240.

Since the sheath connecting member 100 and the sealing member 500 are resilient and a certain spacing S1 can be ensured by setting the sheath connection member 100 until a certain compression deformation occurs, the precast concrete structures 200a and 200b, So that the adjacent sheaths 210 can be connected to each other by the extended head 120. [

Therefore, the sheaths are connected to each other by the extended head portion in the spaced space, so that the insertion of the PC stranded wire is very easy.

4C, the filling material 400 is filled in the spacing space S1 so that the filling material 400 does not leak to the outside of the lower part by the sealing member 500, Thereby integrating the precast prestressed concrete structure 200.

Next, as shown in FIG. 4D, the PC strand 300 is inserted to penetrate through the adjacent sheath 210 and the extended head 120, and is then fixed by tension using a tension jack or the like (not shown) to introduce the prestress. The sheath 210 is also filled with mortar or the like to finish the inside of the sheath.

It will be understood by those skilled in the art that the foregoing description of the present invention is for illustrative purposes only and that those of ordinary skill in the art can readily understand that various changes and modifications may be made without departing from the spirit or essential characteristics of the present invention. will be. It is therefore to be understood that the above-described embodiments are illustrative in all aspects and not restrictive. For example, each component described as a single entity may be distributed and implemented, and components described as being distributed may also be implemented in a combined form.

The scope of the present invention is defined by the appended claims rather than the detailed description and all changes or modifications derived from the meaning and scope of the claims and their equivalents are to be construed as being included within the scope of the present invention do.

100: sheath connecting member
110: Sheath penetration
120: Extension head
200a, 200b: precast prestressed concrete structure
210: Sheets
220: Shear groove
230: Sealing groove
300: PC Strand
400: filler
500: sealing member

Claims (15)

Is installed in the spacing space (S1) of the precast concrete structures (200a, 200b)
A sheath-shaped penetration 110 in the form of a tube extending in intimate contact with the inner surface of the exposed sheath 210 of the precast prestressed concrete structure 200a; And
The annular head integrally formed at the front end of the instant sheath penetration part 110 is formed as a circular head having one side surface 121 contacting the connection end surface 240 of the precast concrete structure 200a and the other surface 122 being adjacent And an extended head portion (120) set in contact with the cast prestressed concrete structure (200b)
The extension head 120 is made of rubber and has elasticity and is installed in close contact with the sheath and the connection end face. The extension head 120 has a diameter larger than the outer diameter of the sheath insertion portion 110 and has a constant thickness T, The spacing space of the precast concrete structures 200a and 200b is adjusted according to the thickness,
A sealing member 520 having protrusions 520 formed on one side surface and the other side surface 510 so that the filling material 400 filled in the upper portion of the spacing space S1 is not leaked to the lower side of the connection end surface of the precast concrete structure 200 500, and the sealing member 500 is installed between the connecting end surfaces, so that a block type of rubber material is used so as to have elasticity,
The sealing member 500 is formed with a sealing groove 230 formed below the connection end face 240 of the precast concrete structure 200 and the protrusion 520 of the sealing member 500 ) Are formed,
An intermediate notched groove 530 is formed in the sealing member 500 so that deformation and restoration that can be easily inserted into the sealing groove can be performed. delete The method according to claim 1,
The inner diameter d4 of the other side 122 of the extension head 120 is formed to be larger than the diameter of the sheath 210 of the adjacent precast concrete structures 200a and 200b to insert the PC stranded wire 300 into the sheath So as not to be caught inside the sheath connecting member (100). delete The method according to claim 1,
Wherein the sheath penetration portion has an inner diameter of the same diameter and an outer diameter of the sheath penetration portion has a tapered outer diameter d2 such that the outer diameter becomes smaller toward the extension length direction of the sheath penetration portion. delete The method according to claim 1,
The protrusion 123 may be formed on one side surface 121 and the other side surface 122 of the extended head 120 so that the protrusion 123 contacts the connecting end surface 240 of the precast concrete structure 200a, And a sheath connecting member for contacting adjacent precast concrete structures 200b. delete delete delete (a) setting precast prestressed concrete structures 200a and 200b to form spaced-apart spaces S1 from each other;
(b) Sheath penetration part 110 of the sheath connecting member 100 of the first embodiment is inserted into close contact with the sheath 210 formed in the precast concrete structure 200a, Shaped prismatic concrete structure 200a having a tapered inner diameter that increases in diameter toward the adjacent prestressed concrete structure 200b toward the adjacent prestressed concrete structure 200b, Exposing the extension head (120) set in contact with the connection end face (240) to the spacing space (S1);
(c) The other side 122 of the extended head is pressed to be connected to the connection end surface of the adjacent precast concrete structure 200b, and the precast concrete structure 200a or 200b is moved by the sheath connecting member 100 Setting a mutually spaced spacing (S1); And
(d) filling and curing the filling material (400) in the spacing space (S1)
In the step (b)
The extension head 120 is made of rubber and has elasticity and is installed in close contact with the sheath and the connection end face. The extension head 120 has a diameter larger than the outer diameter of the sheath insertion portion 110 and has a constant thickness T, The spacing space of the precast concrete structures 200a and 200b is adjusted according to the thickness,
In the step (c)
the protrusions 530 are formed on one side surface and the other side surface 510 so that the filler material 400 filled in the space S1 in the step (d) does not leak to the lower side of the connection end surface of the precast concrete structure 200 The sealing member 500 is provided between the connecting end faces, so that the block member is made of a rubber material so as to have elasticity,
The sealing member 500 is formed with a sealing groove 230 formed below the connection end face 240 of the precast concrete structure 200 and the protrusion 520 of the sealing member 500 And an intermediate notched groove 530 is formed in the sealing member 500 to allow deformation and restoration that can be easily fitted in the sealing groove, Construction method of cast prestressed concrete structure. delete 12. The method of claim 11,
After the step (d), the PC strand 300 is inserted into the sheaths 210 of the precast concrete structures 200a and 200b so as to penetrate the extended head, and the precast concrete structures 200a and 200b (E) fixing the pre-cast concrete structure to the pre-cast concrete structure. delete delete
KR1020150073506A 2015-05-27 2015-05-27 Sheath connecting member and precast prestress concrete structure construction method therewith KR101715199B1 (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20210071338A (en) 2019-12-06 2021-06-16 한국건설기술연구원 Spacer for concrete precast member and slab construction method therewith

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004324330A (en) * 2003-04-28 2004-11-18 Takenaka Komuten Co Ltd Construction method of joint of precast concrete members and connecting pipe used for it

Family Cites Families (3)

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Publication number Priority date Publication date Assignee Title
JPH0791881B2 (en) * 1991-11-22 1995-10-09 株式会社ピー・エス Sheath joint for stuffed concrete
JP2580476B2 (en) * 1993-10-30 1997-02-12 ハツミ産業株式会社 PC concrete panel and its construction method
KR100569578B1 (en) * 2004-04-08 2006-04-10 삼성물산 주식회사 Joint of metal curtain wall

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004324330A (en) * 2003-04-28 2004-11-18 Takenaka Komuten Co Ltd Construction method of joint of precast concrete members and connecting pipe used for it

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20210071338A (en) 2019-12-06 2021-06-16 한국건설기술연구원 Spacer for concrete precast member and slab construction method therewith

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