KR101642049B1 - Member for connecting sheath of precast concrete structure, and construction method using the same - Google Patents

Abstract

It is possible to prevent the mortar from penetrating into the interior of the sheath in the process of filling the mortar by using the sheath connecting member at the connecting portion of the precast concrete member, It is possible to minimize the width of the connecting portion of the precast concrete member, thereby minimizing the amount of the piling of the worksite. And a method of constructing a precast concrete structure using the sheath connecting member, which can improve the workability of the precast concrete member, is provided.

Description

TECHNICAL FIELD The present invention relates to a member for connecting a sheath of a precast concrete structure and a method of constructing a precast concrete structure using the same.

The present invention relates to a sheath connection of a precast concrete structure. More particularly, when a precast concrete structure is constructed by connecting precast concrete members, a sheath The present invention relates to a member for sheath connection and a method of constructing a precast concrete structure using the same.

Recently, a prestressed concrete structure, for example, a prestressed concrete bridge using a PS (Pre Stressed) steel sheet, Kangseon Line or a steel bar, is being actively applied to highways, national roads and local roads. This prestressed concrete structure is divided into a pre-tension method and a post-tension method according to the introduction time of the prestress. Here, the prestress is a method of applying tensile stress to compensate for the weak defects of the concrete Quot; refers to a force that increases tensile stress by applying a compressive force to a portion in advance.

The pre-tension method is a method of providing compressive force to the structure by introducing the prestress by the curing of the concrete by tilting the PS steel in a tense state. In addition, the post tension method is a method in which the tension is applied to the linear This is a method of introducing a prestress into a hydraulic jack by inserting a PS steel into a sheath after the sheath (sheath pipe) is buried and then the upper concrete is placed and cured. In particular, after the PS steel is strained, an empty space in the sheath is grouted It is a method of filling and completing a bridge.

Among the two methods of introducing the prestress, the pre-tension method is a state in which the PS steel (strand or steel bar) and the concrete are in close contact with each other without any gap. In the post tension method, after inserting the concrete, Then, grouting is performed. Since the construction of the current prestressed concrete bridge is mostly done by the post tension method, sufficient grouting must be done to protect the PS steel in the sheath as well as its performance.

Meanwhile, in the construction of a precast concrete structure having a connecting portion without a loop reinforcement or a reinforcing loop joint, mortar is filled in the connecting portion of precast concrete members that are spaced apart at regular intervals, and the post tension By introducing the prestress by the method, the precast concrete members are connected and integrated with each other.

In order to prevent the mortar from penetrating into the sheath previously installed in the precast concrete member in the process of filling the mortar with the connection portion of the precast concrete member, the sheath must be tightly connected.

Meanwhile, as a conventional sheath connecting method, a sheath connecting work space is formed in advance at the connecting portion of the precast concrete member, and the sheath is manually connected. However, when the sheath connection work space is formed at the connection portion of the precast concrete member, the amount of work poured into the work space is increased, and the time and workload for manually connecting the sheath are increased.

In the case of another sheath connecting method according to the related art, when a sheath connecting work space is not secured, a material such as styrofoam is preliminarily attached to the connecting portion of the precast concrete member around the exposed end face so that the mortar penetrates into the sheath .

However, when such sealing work space is not secured and sealing is performed using a material such as styrofoam, the strength of the adhesive force or the material is low, so that the styrofoam is dropped during the clogging of the mortar, Of the mortar can penetrate.

Korean Patent No. 10-557341 filed on Feb. 21, 2003, entitled "Prestress apparatus and method of constructing a prestressing structure using this apparatus" Korean Patent No. 10-1326170 filed on Mar. 23, 2012, entitled "PS Seam Segment Having Connection Fitting Stands, PS Seam Girders and Modular PS Seating Gutter Bridges Using Such Segments, Korean Patent No. 10-368745 filed on Feb. 9, 2000, entitled "Assembling method of reinforcing bars and sheath pipes for bridges and their jigs" Korean Patent Publication No. 2011-73025 (published on June 29, 2011), entitled " Korean Patent No. 10-1128347 filed on June 3, 2009, entitled "Formwork for girders"

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems and an object of the present invention is to prevent a mortar from penetrating into a sheath in a process of filling a mortar by using a sheath connecting member at a connecting portion of a sheath which is a connecting portion of a precast concrete member. And a method for constructing a precast concrete structure using the same.

Another object of the present invention is to provide a precast concrete structure which can be stably and quickly connected by using a sheath connecting member which is fastened in a pair in a transverse direction at a connecting portion of a precast concrete member, And a method of constructing a precast concrete structure using the same.

As a means for achieving the above-mentioned technical object, the sheath connecting member of the precast concrete structure according to the present invention is characterized in that the sheath connecting member includes a first and a second sheath, which are provided in the first and second precast concrete members, A sheath connecting member for a cast concrete structure, comprising: an A-shaped rubber pipe inserted into an inner circumferential surface of a first sheath provided on a first precast concrete member; A B-type rubber tube formed in a shape corresponding to the A-shaped rubber tube and fastened to the A-shaped rubber tube and inserted into an inner peripheral surface of a second sheath provided on the second precast concrete member; And a plastic tube which is respectively inserted into the inner circumferential surfaces of the A- and B-type rubber tubes to maintain the shape of the inside of the A- and B-type rubber tubes, wherein the A- and B- And the mortar is prevented from penetrating into the first and second sheaths when the mortar is poured into the connecting portions of the first and second precast concrete members.

Each of the A-type rubber tube and the B-type rubber tube is formed of a rubber material and is formed into a cylindrical shape or an elliptical shape corresponding to the sectional shape of the first and second sheaths.

The A-shaped rubber tube may include an A-shaped rubber tube penetrating portion inserted into the inner circumferential surface of the first sheath, the A-shaped rubber tube penetrating portion having an outer diameter reduced in an inner direction of the first sheath; An A-shaped rubber tube head formed to be in close contact with a side surface of the first precast concrete member; An A-shaped rubber tube tightening protrusion formed on an inner outer peripheral surface of the A-shaped rubber tube head so as to be in close contact with the first precast concrete member; An A-shaped rubber tube fastening protrusion formed on an outer side of the A-type rubber tube head to closely contact the A-type rubber tube and the B-type rubber tube; And an A-shaped rubber tube formed on the outer side of the A-shaped rubber tube so as to serve as a guide capable of accommodating manufacturing errors of the first and second precast concrete members when the A-shaped rubber tube and the B- Shaped rubber tube guide protrusion.

Here, the B-type rubber pipe may include a B-type rubber pipe penetrating part inserted into the inner circumferential surface of the second sheath, the B-type rubber pipe penetrating part being formed such that an outer diameter thereof decreases in an inner direction of the second sheath; A B-shaped rubber tube head which is formed in close contact with a side surface of the second precast concrete member and is fastened to the head of the A-shaped rubber tube; A B-type rubber tube tightening protrusion formed on an inner peripheral surface of the B-shaped rubber tube head so as to be in close contact with the second precast concrete member; And a B-type rubber tube concave portion formed on an outer side of the B-type rubber tube head portion to insert the A-type rubber tube fastening protrusion.

When the first and second precast concrete members are in close contact with each other, a plurality of bonding surfaces are formed between the A-type rubber pipe and the B-type rubber pipe to prevent the mortar from penetrating. And the manufacturing error of the first and second precast concrete members is accommodated by the guide projection or the concave portion of the B-type rubber tube.

Here, the plastic tube is applied to prevent deformation when a large amount of deformation occurs in the penetration portion in the process of inserting rubber-type A-type and B-type rubber tubes, and the plastic tube is made of a cylindrical It can be a plastic tube.

When the guide protrusion is formed on the A-type rubber pipe, the B-type rubber pipe is automatically inserted into the A-type rubber pipe when the first and second precast concrete members are in close contact with each other, 1 and the second precast concrete member, and the fastening surfaces of the A-type rubber pipe and the B-type rubber pipe serve as a guide capable of preventing the mortar from penetrating the primary joint surface .

When the guide protrusion is not formed on the A-type rubber tube, when the first and second precast concrete members are in close contact with each other, the concave portion of the B-type rubber tube and the concave portion of the A- It is possible to accommodate manufacturing errors of the first and second precast concrete members.

According to another aspect of the present invention, there is provided a method of constructing a precast concrete structure using a sheath connecting member according to the present invention, comprising the steps of: preparing first and second precast concrete members respectively installed in first and second precast concrete members, A method of constructing a precast concrete structure using a sheath connecting member for transversely connecting sheaths, the method comprising the steps of: a) joining a sheath connecting member made of an A- and B-type rubber pipes and a plastic tube to first and second precast concrete Inserting the first and second sheaths into the inner circumferential surface of the first and second sheaths, respectively, b) installing a rubber mold for the mortar pouring into the connecting portions of the first and second precast concrete members; c) closing the first and second precast concrete members so that the A-type rubber pipe and the B-type rubber pipe are fastened to each other; d) placing and curing mortar vertically in the connecting portions of the first and second precast concrete members; e) disposing a tensioning material in the first and second sheaths and introducing a tensioning force using a tensioning device; And f) injecting the grout injection material into the first and second sheaths, wherein the A-type rubber tube and the B-type rubber tube in step a) are tightly fastened to each other to form the first and second precast When the mortar is poured into the connecting portion of the concrete member, the mortar is prevented from penetrating into the first and second sheaths.

The sheath connecting member in the step a) includes an A-shaped rubber pipe inserted into the inner circumferential surface of the first sheath provided on the first precast concrete member; A B-shaped rubber tube formed in a shape corresponding to the A-shaped rubber pipe and fastened to the A-shaped rubber pipe and inserted into an inner peripheral surface of a second sheath provided on the second precast concrete member; And a plastic tube inserted into the inner circumferential surfaces of the A- and B-shaped rubber tubes, respectively, in order to maintain the shape of the inside of the A- and B-shaped rubber tubes.

Here, the A-type rubber tube and the B-type rubber tube in step a) are each formed of a rubber material, and may be formed into a cylindrical shape or an elliptical shape corresponding to the sectional shape of the first and second sheaths.

Here, the form of step b) may be fixed to a position adjacent to the outside of the connection part of the first and second precast concrete members using a screw or concrete nail fixing device.

In this case, a groove having a predetermined thickness is formed in any one of the first and second precast concrete members to fix the form of the step b) to the correct position.

In the step c), when the first and second precast concrete members are closely contacted, the mortar is prevented from being infiltrated by the bonding surfaces of the A-type rubber pipe and the B-type rubber pipe, and the A- The manufacturing error of the first and second precast concrete members can be accommodated by the formed guide protrusion or the recess formed in the B-shaped rubber pipe.

In the step c), the first and second precast concrete members are mounted slightly wider than the target spacing, and then the first and second precast concrete members are closely contacted with the target space by using a device such as a chain block .

Here, the tensions in step e) may be PS steel of a strand or steel bar.

Here, the grout injection material in step f) may be Grout Milk or Mortar.

According to the present invention, it is possible to prevent the mortar from penetrating into the sheath in the course of filling the mortar by using the sheath connecting member at the connecting portion of the precast concrete member.

According to the present invention, by using a sheath connecting member to be coupled in a pair in the transverse direction at the connecting portion of the precast concrete member, stable and quick connection portion construction can be performed, and accordingly, work for connecting the precast concrete member is simple Accordingly, the process for installing the formwork and the sheath connection is simplified, which can shorten the construction period and reduce the construction cost.

According to the present invention, since the sheath is not manually connected, the width of the connecting portion of the precast concrete member can be minimized, thereby minimizing the amount of on-site pouring and improving the workability of the precast concrete member.

1 is a view showing a member for connecting a sheath of a precast concrete structure according to an embodiment of the present invention.
2 is a view illustrating an A-shaped rubber pipe and a B-shaped rubber pipe in a sheath connecting member of a precast concrete structure according to an embodiment of the present invention.
3 is a view illustrating a mortar pouring die installed at a connection portion of a precast concrete member according to an embodiment of the present invention.
FIGS. 4A and 4B are views illustrating connection of sheaths of a precast concrete structure using a sheath connecting member according to an embodiment of the present invention, respectively.
5 is a flowchart illustrating an operation method of a precast concrete structure using a sheath connecting member according to an embodiment of the present invention.
6A to 6F are views for explaining a concrete method of constructing a precast concrete structure using a sheath connecting member according to an embodiment of the present invention.

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.

[Member for sheath connection (100) of precast concrete structure]

FIG. 1 is a view showing a member for connecting a sheath of a precast concrete structure according to an embodiment of the present invention. FIG. 2 is a cross-sectional view of an A- - < / RTI >

Referring to FIG. 1, a sheath connecting member 100 of a precast concrete structure according to an embodiment of the present invention includes first and second sheath connecting members 210a and 210b at a connecting portion of the first and second precast concrete members 210a and 210b, Shaped rubber tube 110, a B-shaped rubber tube 120 and plastic tubes 130a and 130b, which are members for sheath connection for connecting the first and second tubes 220a and 220b in the lateral direction. 2, the A-type rubber tube 110 includes a penetration portion 111, a head portion 112, a contact protrusion 113, a fastening protrusion 114, and a guide protrusion 115 Type rubber tube 120 includes a penetration portion 121, a head portion 122, a contact projection 123, and a concave portion 124. The B-

The A-type rubber tube 110 is inserted into the inner circumferential surface of the first sheath 220a provided on the first precast concrete member 210a, and the B-type rubber tube 120 is inserted into the inner surface of the first sheath 220a. Shaped rubber tube 110 and is inserted into the inner circumferential surface of the second sheath 220b installed on the second precast concrete member 210b so as to be connected to the A- . That is, the rubber-made cylindrical rubber pipes 110 and 120 are rubber pipes made up of a pair of A- and B-shaped pipes, and the first and second concrete pipes 210a and 210b are connected to each other at a connecting portion of the first and second precast concrete members 210a and 210b. When the first and second precast concrete members 210a and 210b are in close contact with each other to connect the sheaths 220a and 220b,

The guide protrusions 115 of the A-type rubber pipe 110 and the concave portions 124 of the B-type rubber pipe 120 are formed by the manufacturing errors of the first and second precast concrete members 210a and 210b As shown in FIG.

The plastic pipes 130a and 130b prevent deformation when a large deformation occurs in the penetration parts 111 and 121 in the process of inserting the rubber pipes 110 and 120 of the rubber material. Type and B-type rubber pipes 110 and 120, respectively, if necessary to maintain the shape of the A- and B-type rubber pipes 110 and 120. The A- and B- ). Specifically, since the A-type and B-type rubber pipes 110 and 120 have small rigidity and are easily deformed, the plastic pipes 130a and 130b are formed on the inner peripheral surfaces of the A- and B- Shaped rubber pipes 110 and 120 are inserted into the first and second sheaths 220a and 220b to prevent the A- and B-shaped rubber pipes 110 and 120 from being deformed, 220b, respectively.

Accordingly, the A-type rubber pipe 110 and the B-type rubber pipe 120 are tightly fastened to each other, and when the mortar 240 is poured into the connecting portion of the first and second precast concrete members 210a and 210b It is possible to prevent the mortar 240 from penetrating into the first and second sheaths 220a and 220b.

2, the A-shaped rubber tube intrusion portion 111 is inserted into the inner circumferential surface of the first sheath 220a and is formed such that the outer diameter of the first sheath 220a decreases toward the inside of the first sheath 220a. That is, the A-shaped rubber tube intrusion portion 111 is inserted into the inner circumferential surface of the first sheath 220a and is formed so that the insertion outer diameter gradually decreases inward of the first sheath 220a, The rubber tube 110 is tightly fitted with the inner circumferential surface of the first sheath 220a during the penetration of the rubber tube 110 into the first sheath 220a.

The A-shaped rubber tube head 112 is formed in close contact with the side surface of the first precast concrete member 210a.

The A-shaped rubber tube contact protrusion 113 is formed on the inner peripheral surface of the A-shaped rubber tube head 112 so as to be in close contact with the first precast concrete member 210a. In other words, the A-type rubber tube contact protrusion 113 can be deformed to easily adhere to the rubber-concrete contact surface, so that even when the concrete surface of the first precast concrete member 210a is not smooth, A confined joint surface can be formed.

The A-type rubber tube fastening protrusion 114 is formed outside the A-type rubber tube head 112 such that the A-type rubber tube 110 and the B-type rubber tube 120 are in close contact with each other.

The A-type rubber tube fastening guide protrusion 115 is formed in such a manner that the A-type rubber tube 110 covers the B-type rubber tube 120 and functions as a guide. Respectively.

The B-type rubber tube intrusion portion 121 is inserted into the inner circumferential surface of the second sheath 220b and is formed so that the outer diameter of the second sheath 220b decreases inward. That is, the B-type rubber tube penetration portion 121 is inserted into the inner circumferential surface of the second sheath 220b, and the insertion outer diameter gradually decreases toward the inside of the second sheath 220b, (120b) is inserted into the second sheath (220b) while being tightly fitted with the inner circumferential surface of the second sheath (220b).

The B-type rubber tube head 122 is formed in close contact with the side surface of the second precast concrete member 210b and forms a contact surface with the A-type rubber tube head 112. For example, in the case where the A-type rubber tube head portion 122 is formed with a contact surface with the outer side of the A-type rubber tube head portion 112 and the A-type rubber tube guide protrusion 115 is formed, And is formed so as to be covered by the A-type rubber tube guide protrusion 115.

The B-type rubber tube contact protrusion 123 is formed on the inner peripheral surface of the B-type rubber tube head 122 so as to be in close contact with the second precast concrete member 210b. That is, the B-type rubber tube contact protrusions 123 can be deformed to easily adhere to the rubber-concrete contact surface, so that even when the concrete surface of the second precast concrete member 210b is not smooth, A confined joint surface can be formed.

The B-type rubber tube concave portion 124 is formed on the outside of the B-type rubber tube head portion 122 so that the A-type rubber tube fastening protrusion 114 is inserted. Accordingly, the A-shaped rubber tube fastening protrusion 114 formed on the front surface of the A-shaped rubber tube 110 and the B-shaped rubber tube recessed portion 124 formed on the front surface of the B- So that a more reliable joining surface can be formed on the joining surface between the rubber and the rubber.

Therefore, when the first and second precast concrete members 210a and 210b are closely contacted with each other, the mortar 240 is prevented from penetrating between the A-type rubber pipe 110 and the B- And the first and second precast concrete members 210a and 210b are formed by the guide protrusions 115 of the A-type rubber pipe or the concave portions 124 of the B-type rubber pipe. The error will be accommodated.

For example, when the guide protrusion 115 is formed on the A-type rubber pipe 110, when the first and second precast concrete members 210a and 210b are closely contacted with each other, the B- Is automatically inserted into the A-type rubber pipe 110 to serve as a guide capable of accommodating manufacturing errors of the first and second precast concrete members 210a and 210b, and the A- 110 and the B-type rubber tube 120 form a primary bonding surface for preventing the mortar 240 from penetrating.

When the guide protrusion 115 is not formed on the A-type rubber pipe 110, when the first and second precast concrete members 210a and 210b are closely contacted with each other, the B- The manufacturing errors of the first and second precast concrete members 210a and 210b can be accommodated by the clearance between the concave portion 124 of the A-shaped rubber pipe 110 and the fastening protrusion 114 of the A- .

Therefore, the sheath connecting member 100 according to the embodiment of the present invention may be formed in a circular shape to connect the sheaths 220a and 220b having circular cross sections and may be applied to connect the sheaths 220a and 220b having the elliptical cross- It may be manufactured and applied in an elliptical shape. That is, each of the A-type rubber tube 110 and the B-type rubber tube 120 is formed of a rubber material and formed into a cylindrical shape or an elliptical shape corresponding to the sectional shape of the first and second sheaths 220a and 220b .

[Construction method of precast concrete structure using sheath connecting member 100]

FIG. 3 is a view showing a mortar pouring formwork installed in a connection portion of a precast concrete member according to an embodiment of the present invention. FIGS. 4A and 4B are views showing a pre- 4A shows a state before the first and second precast concrete members 210a and 210b are brought into close contact with each other, and FIG. 4B shows a state where the first and second precast concrete members < RTI ID = Type rubber tube 110 and the B-type rubber tube 120 are automatically engaged with each other.

As shown in FIG. 3, the mold 230 for molding mortar, which is installed at the connection portion of the precast concrete member according to the embodiment of the present invention, includes the first and second precast concrete members 210a and 210b As shown in FIG. For example, the mold 230 is a sealing member made of a rubber material and has protrusions 231 and grooves 232, and is fixed to the first and second precast concrete 230 using a fixing device such as a screw or a concrete nail. It can be fixed at a position adjacent to the outside of the connection part of the members 210a and 210b.

4A and 4B, the sheath connecting member 100 is connected to the first and second precast concrete members 100 and 100 by using the sheath connecting member according to the embodiment of the present invention. A part of the first and second precast concrete members 210a and 210b are inserted into the first and second sheaths 220a and 220b exposed at the connection portions of the members 210a and 210b, The rubber-rubber and rubber-concrete surfaces of the A-type and B-type rubber pipes 110 and 120 are tightly adhered to each other according to the characteristics of the rubber material so that the first and second pre- The structure prevents the mortar 240 injected into the connection portions of the concrete members 210a and 210b from penetrating into the first and second sheaths 220a and 220b.

FIG. 5 is an operational flowchart of a method of constructing a precast concrete structure using a sheath connecting member according to an embodiment of the present invention. FIGS. 6A to 6F are views illustrating a method of assembling a precast concrete structure using a sheath connecting member according to an embodiment of the present invention The concrete construction method of the precast concrete structure is specifically described below.

5 and 6A to 6F, a method of constructing a precast concrete structure using a sheath connecting member according to an embodiment of the present invention includes the steps of forming a first precast concrete member 210a and a second precast concrete member 210b, A method of constructing a precast concrete structure using a sheath connecting member for horizontally connecting the installed first and second sheaths 220a and 220b includes first and second A-type and B-type rubber pipes 110 and 120, The sheath connecting member 100 consisting of the first and second precast concrete members 130a and 130b is inserted into the inner circumferential surfaces of the first and second sheaths 220a and 220b previously installed on the first and second precast concrete members 210a and 210b S110). 2, the sheath connecting member 100 includes an A-shaped rubber tube (not shown) inserted into an inner circumferential surface of a first sheath 220a provided on the first precast concrete member 210a, 110); Shaped rubber tube 110 and is inserted into the inner circumferential surface of the second sheath 220b installed on the second precast concrete member 210b A B-type rubber tube 120; And plastic pipes 130a and 130b inserted into the inner circumferential surfaces of the A- and B-shaped rubber pipes 110 and 120 to maintain the shape of the A- and B-shaped rubber pipes 110 and 120, respectively can do. Each of the A-type rubber tube 110 and the B-type rubber tube 120 is formed of a rubber material and is formed into a cylindrical shape or an elliptical shape corresponding to the sectional shape of the first and second sheaths 220a and 220b But are not limited to,

Next, a mold 230 of a rubber material for putting mortar is installed at a connecting portion of the first and second precast concrete members 210a and 210b (S120). For example, the mold 230 is a sealing member made of a rubber material and is fixed at a position adjacent to the outside of the connection portion of the first and second precast concrete members 210a and 210b using a fixing device such as a screw or a concrete nail Can be fixed. In order to fix the mold 230 of the rubber material to the correct position as shown by a reference A, a groove having a predetermined thickness is formed on either one of the first and second precast concrete blocks 210a and 210b .

Next, the first and second precast concrete members 210a and 210b are brought into close contact with each other so that the A-type rubber pipe 110 and the B-type rubber pipe 120 can be fastened to each other (S130). For example, after the first and second precast concrete members 210a and 210b are mounted slightly wider than the target spacing, the first and second precast concrete members 210a and 210b may be fixed by using equipment such as a chain block (not shown) The concrete members 210a and 210b are brought into close contact with each other up to the target space. At this time, the sheath connecting member 100 and the rubber mold 230 are brought into close contact with the first and second precast concrete members 210a and 210b, respectively, to form a sealed joint surface. Therefore, the A-type rubber pipe 110 and the B-type rubber pipe 120 are tightly fastened to each other so that when the mortar 240 is poured into the connecting portion of the first and second precast concrete members 210a and 210b, The first and second sheaths 220a and 220b are prevented from penetrating the first and second sheaths 220a and 220b.

Next, the mortar 240 is vertically laid on the connecting portions of the first and second precast concrete members 210a and 210b (S140). Accordingly, the mortar 240 is prevented from penetrating into the first and second sheaths 220a and 220b by the sheath connecting member 100.

Next, after the curing of the mortar 240 is completed, a PS steel material 250, for example, a strand or steel bar is disposed in the first and second sheaths 220a and 220b, A tensile force is applied to the first and second precast concrete members 210a and 210b by using a tension device (not shown) of the first precast concrete member 210a (S150).

Next, after a tension force is introduced into the first and second precast concrete members 210a and 210b, a grout injection material 260, for example, grout milk, is injected into the first and second sheaths 220a and 220b. (Grout Milk) or mortar (Mortar) (S160).

At this time, the grouting material 260 is prevented from leaking to the outside of the first and second sheaths 220a and 220b by the sheath connecting member 100. Grouting for injecting the grout injection material 260 is performed by tensioning the PS steel material 250 inserted into the first and second sheaths 220a and 220b and then compressing the PS steel material 250 from an external harmful substance such as chloride The first and second sheaths 220a and 220b are tightly filled with grout milk or mortar 260 as a cementitious material.

In the method of constructing a precast concrete structure using a sheath connecting member according to an embodiment of the present invention, when the first and second precast concrete members 210a and 210b are closely contacted, the A-type rubber pipe 110 and the B -Type rubber tube 120 is formed with a plurality of bonding surfaces for preventing the mortar 240 from infiltrating, and the guide protrusion 115 of the A-type rubber tube or the concave portion of the B- 124 to accommodate manufacturing errors of the first and second precast concrete members 210a, 210b.

As a result, according to the embodiment of the present invention, the sheath connecting member is used at the connecting portion of the precast concrete member to prevent the penetration of the mortar into the sheath in the process of filling the mortar. In addition, by using a sheath connecting member which is fastened in a pair in the transverse direction at the connecting portion of the precast concrete member, stable and quick connection can be made, and work for connecting the precast concrete member is simplified, This simplifies the process of installing the formwork and connecting the sheath, thus shortening the construction period and reducing the construction cost. In addition, since the sheath is not required to be connected by additional manual operation, the width of the connection portion of the precast concrete member is minimized, thereby minimizing the amount of on-site pouring and improving the workability of the precast concrete member.

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: member for connecting the sheath
110: A-type Rubber Tube (A-type Rubber Tube)
120: B-type rubber tube
130a, 130b: plastic tube
111: A-type rubber tube penetration part
112: A-type rubber tube head
113: A-type rubber tube contact projection
114: A-type rubber tube fastening projection
115: A-type rubber tube guide projection
121: B-type rubber tube penetration part
122: B-type rubber tube head
123: B-type rubber tube contact projection
124: B-type rubber tube concave portion
210a, 210b: a precast concrete member
220a, 220b: Sheath,
230: Rubber mold
240: Connection mortar
250: Tension material (PS steel)
260: grouting material (grout milk or mortar)

Claims (18)

The sheath connecting member of a precast concrete structure for laterally connecting first and second sheaths (220a, 220b) provided in first and second precast concrete members (210a, 210b), respectively,
An A-type rubber tube 110 inserted into the inner circumferential surface of the first sheath 220a provided on the first precast concrete member 210a;
Type rubber tube 110 and is inserted into the inner circumferential surface of the second sheath 220b provided on the second precast concrete member 210b and formed into a shape corresponding to the A- A B-type rubber tube 120; And
An A-shaped rubber tube penetration portion 111 formed to reduce the outer diameter in the inner direction of the first sheath 220a to maintain the shape of the inside of the A-type and B-type rubber pipes 110 and 120, And plastic pipes 130a and 130b respectively inserted into the inner circumferential surface of the B-shaped rubber pipe penetration part 121 formed so as to have an outer diameter decreasing inward of the sheath 220b,
The A-type rubber pipe 110 and the B-type rubber pipe 120 are tightly joined to each other so that when the mortar 240 is poured into the connecting portion of the first and second precast concrete members 210a and 210b, (240) from penetrating into the first and second sheaths (220a, 220b)
The A-shaped rubber tube 110 includes an A-shaped rubber tube penetration part 111 inserted into the inner circumferential surface of the first sheath 220a and having an outer diameter reduced toward the inner side of the first sheath 220a. An A-shaped rubber tube head 112 formed to be in close contact with a side surface of the first precast concrete member 210a; An A-shaped rubber tube contact protrusion 113 formed on an inner peripheral surface of the A-shaped rubber tube head 112 so as to be in close contact with the first precast concrete member 210a; An A-type rubber tube fastening protrusion 114 formed on the outside of the A-type rubber tube head 112 so that the A-type rubber tube 110 and the B-type rubber tube 120 are in close contact with each other; Shaped rubber tube 110 and the B-shaped rubber tube 120 when the first and second precast concrete members 210a and 210b are closely contacted with each other, And an A-shaped rubber pipe guide protrusion (115) formed outside the A-shaped rubber pipe head (112). The method according to claim 1,
Each of the A-shaped rubber pipe 110 and the B-shaped rubber pipe 120 is formed of a rubber material and has a cylindrical or elliptical shape corresponding to the sectional shape of the first and second sheaths 220a and 220b A member for connecting a sheath of a precast concrete structure. delete 2. The B-type rubber tube (120) according to claim 1, wherein the B-
A B-type rubber tube intrusion portion 121 inserted into the inner circumferential surface of the second sheath 220b and formed to have an outer diameter reduced inward of the second sheath 220b;
A B-type rubber tube head 122 formed to be in close contact with the side surface of the second precast concrete member 210b and fastened to the A-type rubber tube head 112;
A B-type rubber tube contact protrusion 123 formed on the inner peripheral surface of the B-shaped rubber tube head 122 so as to be in close contact with the second precast concrete member 210b; And
And a B-type rubber tube concave portion (124) formed on the outer side of the B-type rubber tube head portion (122) so that the A-type rubber tube fastening protrusion (114) is inserted. 5. The method of claim 4,
When the first and second precast concrete members 210a and 210b are closely contacted with each other, a plurality of layers (not shown) are formed between the A-type rubber pipe 110 and the B- And a manufacturing error of the first and second precast concrete members 210a and 210b is formed by the A-type rubber tube guide protrusion 115 or the concave portion 124 of the B- Wherein the sheath connecting member is a member for connecting the sheath of the precast concrete structure. 5. The method of claim 4,
When the first and second precast concrete members 210a and 210b are in close contact with each other, the B-shaped rubber pipe 120 is formed in the A -Type rubber tube 110 and serves as a guide capable of receiving a manufacturing error of the first and second precast concrete members 210a and 210b, Wherein the fastening surface of the B-type rubber tube (120) forms a primary joint surface to prevent the mortar (240) from penetrating. 5. The method of claim 4,
When the guide protrusion 115 is not formed on the A-type rubber pipe 110, when the first and second precast concrete members 210a and 210b are closely contacted with each other, The manufacturing error of the first and second precast concrete members 210a and 210b is accommodated by the gap between the concave portion 124 and the fastening protrusion 114 of the A- Members for sheath connection of precast concrete structures. delete A method of constructing a precast concrete structure using a sheath connecting member for horizontally connecting first and second sheaths (220a, 220b) provided in first and second precast concrete members (210a, 210b)
a) A sheath connecting member 100 composed of rubber pipes 110 and 120 and plastic pipes 130a and 130b is installed in the first and second precast concrete members 210a and 210b in advance Respectively, into the inner circumferential surfaces of the first and second sheaths 220a and 220b;
b) installing a mold 230 of a rubber material for putting mortar on the connecting portions of the first and second precast concrete members 210a and 210b;
c) bringing the first and second precast concrete members (210a, 210b) into close contact so that the A-type rubber pipe (110) and the B-type rubber pipe (120) can be fastened to each other;
d) placing and curing the mortar 240 in a direction perpendicular to the connecting portions of the first and second precast concrete members 210a and 210b;
e) placing a tension member (250) in the first and second sheaths (220a, 220b) and introducing a tension force using a tension device; And
f) injecting a grout injection material (260) into the first and second sheaths (220a, 220b)
The A-type rubber pipe 110 and the B-type rubber pipe 120 in the step a) are tightly coupled to each other so that the mortar 240 is inserted into the connection part of the first and second precast concrete members 210a and 210b Thereby preventing the mortar 240 from penetrating into the first and second sheaths 220a and 220b,
The plastic pipes 130a and 130b of the step a) are formed so that the outer diameter of the plastic pipes 130a and 130b decreases toward the inner side of the first sheath 220a to maintain the shape of the A- and B- Shaped rubber tube penetration portion 111 and the B-shaped rubber tube penetration portion 121 formed to reduce the outer diameter of the second sheath 220b inward, respectively,
The A-shaped rubber tube 110 includes an A-shaped rubber tube penetration part 111 inserted into the inner circumferential surface of the first sheath 220a and having an outer diameter reduced toward the inner side of the first sheath 220a. An A-shaped rubber tube head 112 formed to be in close contact with a side surface of the first precast concrete member 210a; An A-shaped rubber tube contact protrusion 113 formed on an inner peripheral surface of the A-shaped rubber tube head 112 so as to be in close contact with the first precast concrete member 210a; An A-type rubber tube fastening protrusion 114 formed on the outside of the A-type rubber tube head 112 so that the A-type rubber tube 110 and the B-type rubber tube 120 are in close contact with each other; Shaped rubber tube 110 and the B-shaped rubber tube 120 when the first and second precast concrete members 210a and 210b are closely contacted with each other, And an A-shaped rubber pipe guide protrusion (115) formed outside the A-shaped rubber pipe head (112). 10. The method of claim 9,
The B-type rubber pipe 120 in the step a) is formed in a shape corresponding to the A-type rubber pipe 110 and is fastened to the A-type rubber pipe 110, and the second precast concrete member 210b, Is inserted into the inner circumferential surface of the second sheath (220b) installed on the first sheath (220). 10. The method of claim 9,
Each of the A-shaped rubber tube 110 and the B-shaped rubber tube 120 in step a) is formed of a rubber material and has a cylindrical or oval shape corresponding to the sectional shape of the first and second sheaths 220a and 220b Wherein the pre-cast concrete structure is formed by using a sheath connecting member. 10. The method of claim 9,
Wherein the mold 230 in the step b) is fixed to a position adjacent to the outside of the connection part of the first and second precast concrete members 210a and 210b using a screw or concrete nail fixing device. CONSTRUCTION METHOD FOR PRECAST CONCRETE STRUCTURE USING WIPO Patent Application WO / 10. The method of claim 9,
Wherein a groove having a predetermined thickness is formed on any one of the first and second precast concrete members (210a, 210b) to fix the formwork (230) of the step (b) A Method of Construction of Precast Concrete Structure Using. 10. The method of claim 9,
When the first and second precast concrete members 210a and 210b are closely contacted with each other in step c), the mortar 240 is bonded to the A-shaped rubber pipe 110 and the B- And the first and second precast concrete members 110 and 120 are prevented by the guide protrusion 115 formed on the A-shaped rubber pipe 110 or the concave portion 124 formed on the B- (210a, 210b). The method for constructing a precast concrete structure using the sheath connecting member according to claim 1, 15. The method of claim 14,
In step c), the first and second precast concrete members 210a and 210b are mounted slightly wider than the target spacing, and then the first and second precast concrete members 210a and 210b And 210b are brought into close contact with each other up to a target spacing, thereby forming a precast concrete structure. 10. The method of claim 9,
Wherein the prestressing material 250 of step e) is a PS steel material of a strand or a steel bar. 10. The method of claim 9,
Wherein the grout injection material (260) in step (f) is grout milk or mortar. 27. A method of constructing a precast concrete structure, comprising the steps of: A precast concrete structure constructed by a method of constructing a precast concrete structure using the sheath connecting member according to any one of claims 9 to 17.

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