KR101472027B1 - Method of building concrete structure using attachment plates adjoining ends of concrete beam with walls of abutments - Google Patents

Abstract

The present invention relates to a technique for constructing a concrete structure by mounting a beam made of concrete such as a PSC beam or a composite beam on an alternating wall, and a beam attached with an attachment for improving the mutual confinement effect is mounted on the alternate wall It is easy to construct concrete structure by placing concrete on top of both alternate walls and bottom plate, and the fracture between wall and upper structure is sure. The attachment of the present invention is formed of a continuous plate having a stud bolt. A bolt hole is formed at one end of the pivot plate to be engaged with the beam side portion, and a through hole is formed at the other end. Since the alternating wall and beams are connected in the form of a fissure, the shape of the concrete structure is reduced, and the cost of construction is reduced as well as the maintenance of the structure is simplified. The step of constructing comprises attaching and fixing an attachment to the end of the beam by making an attachment; Constructing each of the alternating walls in such a manner that a support portion is provided at the upper end of the wall and a vertical reinforcing bar is projected; Placing the beam on a receiving portion and installing a horizontal reinforcing bar through the through hole; And placing the concrete on the top of the wall and the bottom plate to integrate the beam and the wall.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a method of constructing a concrete structure using alternating wall and a binding attachment of a concrete beam end,

The present invention relates to a method of constructing a concrete structure using a binding attachment of an alternating wall and a concrete beam end. More particularly, the present invention relates to a method of constructing a concrete structure using an attachment for firmly binding an alternating wall and a concrete beam end, To a construction method in which a concrete beam with an attachment is mounted on an alternating wall constructed and then a mold is installed on a beam without any movement and a concrete is laid to construct various types of structures.

In general, a concrete structure such as a ramen bridge is constructed by mounting a pre-fabricated concrete beam on an alternating wall and pouring concrete into the beam, thereby connecting the alternating wall and the beam integrally. In this case, the geometry of the beam end is important.

FIGS. 9A and 9B are a partial side sectional view and a beam sectional view for explaining connection with a wall body according to a sectional shape of a general concrete beam. FIG. As shown in Figs. 9A and 9B, the end portion of the concrete beam 1 is usually formed in a rectangular (square) shape. When a beam is connected to the alternating wall 2 by using such a beam 1, when a bending moment 5 acts on the beam end as shown in FIG. 9A, the beam 1 embedded in the wall 2, It is difficult to expect a sufficient restraining force due to the lack of toughness and the effect of shear connection at the interface between the end portion and the poured concrete 4, and there is a great possibility that cracks due to shearing at the connecting portion are likely to occur. As described above, when the concrete beam 1 and the alternating wall member 2 are connected to each other, there is a problem of insufficient shear resistance at the beam interface.

FIG. 1 shows a conventional long-span prestressed concrete girder-type ramen bridge and its construction method according to Korean Patent Registration No. 10-0946716 (entitled "Moment Redistribution"). In the prior art, the wall upper end 3 on which the beam 1 is mounted is expanded in the form of a bracket. 1, after the PSC (prestressed concrete) beam 1 is mounted on the extended upper wall 3 of the alternating wall, the reinforcing tensile member 12 is installed across the horizontal through- And then the concrete is poured into the wall top 3 and the bottom plate 3 'to integrate the alternating wall 2 and the upper structure 4 together. This method is a method of integrating the side surface of the end of the PSC beam 1 with the concrete laid by using the rod-like tension member 12, and the beam constraint effect through the shear reinforcement at the interface due to the lack of rigidity of the rod- . Further, if the number of the tension members 12 increases, the safety of the ends of the PSC beam 1 may be hindered by the increase of the through holes 10. [ In addition, since the end of the PSC beam is separated from the axis of the alternating wall body 2 and is simply supported on the bracket-shaped wall upper end portion 3, the stability is lowered and the supporting portion 7 at the lower end of the PSC beam end is exposed to the outside, Lt; / RTI >

(1) Korean Patent Registration No. 100946716 (title of the invention: Long-span prestressed concrete girder-type ramen bridge through moment redistribution and its construction method)

An object of the present invention is to provide a method of constructing a concrete structure using an alternate wall and a binding attachment of a concrete beam end.

An object of the present invention is to provide an attachment to be attached to a beam end in order to solve the problem of insufficient shear resistance at a beam interface at the time of connecting a concrete beam and an alternating wall.

The present invention relates to a method for constructing a concrete structure such as a ramen bridge in which a beam having an attachment attached to both ends of a beam is mounted on an upper portion of an alternating wall and a concrete is poured on a bottom plate including an upper portion of the wall, This is because the alternating wall and the beam are reliably connected in the form of a fulcrum by the attachment, so that the mold height is reduced and the construction cost is reduced as compared with the conventional simple bridge type beam bridge.

The present invention also provides a method of constructing a concrete structure that reduces the height of a beam by improving the load-carrying performance due to a secondary dead load and a live load, by using the attachment installed at the end of the beam to break the upper part of the alternate wall and the beam. do.

Another object of the present invention is to provide a method of constructing a concrete structure by connecting a top of an alternating wall and a beam directly to each other, thereby eliminating a calibration device and constructing a structure of a raymen bridge structure favorable for maintenance.

Another object of the present invention is to provide a method of constructing a concrete structure in which workability in the field is improved by applying a simple screwing method to a bolt provided at an end of a beam in attaching an attachment which is a binding means.

In addition, studs are installed on the left and right side of the straight plate to construct the attachment to increase the adhesive force and fixation effect with concrete. Through holes are provided and the straight plate, the horizontal and vertical reinforcing bars and the concrete to be pushed are integrally joined, The present invention also provides a method for constructing a concrete structure.

It is another object of the present invention to provide a method of constructing a concrete structure that can reduce the height of a beam bridge and improve the compatibility with a surrounding landscape by structurally breaking the bridge structure with a lower structure such as a wall or a pier.

In order to achieve the above object, the present invention provides an attachment to be attached to both sides of both ends of a concrete beam in order to bind a concrete beam end with an alternating wall, wherein one end is attached to the end of the beam, A pivot plate (202) protruding beyond the end of the beam and not attached to the beam; A plurality of stud bolts 206 protruding from the side of the flexible plate 202 except the side directly attached to the beam; And a plurality of bolt holes (204) formed in the continuous plate (202) so that a bolt (110) protruding from the side of the beam to which the continuous plate (202) Thereby providing an attachment for the end portion.

Preferably, the end of the continuous plate 202 has a through hole or a through-hole 208 through which the horizontal reinforcing bar 210 penetrates after the beam is fixed.

Preferably, the stud bolt 206 is replaced by an angle or U-shaped steel.

In order to achieve the above object, the present invention provides a method of constructing a concrete structure, comprising the steps of: preparing a binding attachment for an alternating wall and a concrete beam end, attaching and fixing the attachment to the concrete beam end (S80) ; A step (S82) of constructing each alternate wall in such a form that a support part is provided on the upper part of the alternating wall and the vertical reinforcing steel is projected; And a step (S86) of mounting the beam on the receiving unit, installing a mold on the top and bottom of the wall, and pouring concrete to integrate the beam and the wall.

Preferably, the attaching and fixing step (S80) is characterized in that the attachment, which is separately manufactured at the time of beam manufacturing, is installed in a mold and integrated with the beam.

Preferably, the step further comprises a step (S84) of mounting the beam on the receiving portion and installing a horizontal reinforcing bar through a through hole or a through groove formed in the attachment.

Preferably, the material of the receiving portion is a steel pipe, a steel bar, a steel plate, or an H-shaped steel.

The present invention provides a binding attachment of an alternating wall and a concrete beam end to provide an attachment to an end of a beam to provide a simple construction and an excellent connection effect with alternating walls when a concrete structure such as a ramen bridge is installed . In addition, after the alternating wall and the beam are connected, since the secondary dead load and the live load, which are operated afterwards, are supported by the beam of smaller cross section, various types of structures can be constructed at low cost.

Also, installation of the attachment is a connection method in which a pre-manufactured attachment is attached to a beam end portion using a bolt in the field, so that the construction is good.

Further, the attachment embedded in the upper portion of the wall serves to integrate the beam end with the wall by the effect of enlarging the attachment area and the effect of the stud bolts installed on the reinforcing plate. That is, the reinforcing plate and the stud bolt protruding from the alternating wall, the attachment reinforcing plate and the stud bolt, and the horizontal reinforcing bar penetrating through the end of the reinforcing plate reinforce the shear reinforcement.

The present invention effectively bends the beam and the wall to secure the bending stiffness at the connection portion, which reduces the height of the conventional simple beam bridge and eliminates the need for a coaxial apparatus, facilitating maintenance and greatly reducing the material cost and construction cost.

In addition, the present invention is an excellent technique for application to urban construction with a lot of traffic flow and traffic volume.

1 is a detailed view of a connection between a wall connection part and a PSC beam of the prior art.
2A and 2B are three-dimensional views of an alternating wall of a ramen bridge of the present invention.
Fig. 3 is a schematic side view of the completion of the ramen bridge of the present invention.
4 is a perspective view of a beam end embedded with a bolt in a side portion.
5A and 5B are a perspective view and a front view of the attachment according to the present invention.
6 is a detailed view showing a state before the wall and the beam end are joined before placing the beam on the alternating wall of the present invention.
FIG. 7 is a detailed view of a wall connection portion in which a concrete is inserted so that a wall and a beam end are coupled after the beam is mounted on the alternate wall of the present invention.
FIG. 8 is a construction flow chart for explaining a method of constructing a concrete structure using an alternating wall of the present invention and a binding attachment of a concrete beam end; FIG.
FIGS. 9A and 9B are a partial side sectional view and a beam sectional view for explaining connection with a wall body according to a sectional shape of a general concrete beam. FIG.
FIGS. 9c and 9d are a partial side sectional view and a beam sectional view for explaining connection with a wall body according to the sectional shape of a concrete beam in which the attachment of the present invention is installed. FIG.
10A and 10B are comparative bending moments of a ramen bridge and a simple support bridge.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

First, when the shear resistance at the beam interface is insufficient at the connection between the concrete beam and the alternating wall, cracks due to shearing are likely to occur at the connection site.

First, it is a shear reinforcement device attached to both ends of the fabricated beam. Two sets of attachments are attached to the sides of the beam end parallel to each other, which significantly increases the surface area of the beam end in contact with the concrete and increases the shear resistance so that the wall and the beam move together.

Second, the structure of the attachment. The attachment consists of a straight plate, a stud bolt, a through hole and a bolt hole. Stud bolts are welded to the left and right sides of the straight plate, bolt holes are provided at one end of the straight plate, and through holes are provided at the other end.

Third, it is the base. The receiving portion is preferably composed of a steel pipe and is fixed to the wall by a hook at the lower end. The beams are supported up to concrete pouring of the upper wall and bottom plate including the beam mounting.

Fourth, concrete pouring of upper wall and bottom plate. After the beam is mounted, the formwork is installed on the beam without any extra effort and the concrete of the upper wall and the bottom plate is laid to connect the alternating wall to the beam. The alternating wall and the beam are surely connected by the attachment in the form of the steel, Type beam bridges, and the construction cost is also reduced.

According to an aspect of the present invention, there is provided an attachment attached to both sides of both ends of a concrete beam of the present invention, wherein one end is attached to the end of the beam and the other end is projected past the end of the beam, A straight plate not attached to the plate; A plurality of stud bolts protruding from the side of the continuous plate except a side directly attached to the beam; And a plurality of bolt holes formed in the continuous plate so that a bolt protruding from the side of the beam to which the vertical plate is attached is inserted to greatly increase the surface area contacting the concrete at the beam end and increase the shear resistance, The beam can move in unison. At this time, a through hole or a through-hole may be provided at the end of the continuous plate to allow the horizontal reinforcing steel to penetrate after beam mounting.

According to another aspect of the present invention, there is provided a method of constructing a concrete structure according to the present invention, comprising the steps of: preparing a binding attachment of an alternating wall and a concrete beam end; attaching and fixing the attachment to the concrete beam end; Constructing each of the alternating walls in such a manner that a supporting portion is provided at the upper end of the alternating wall and the vertical reinforcing bars are projected; And placing the beam on a receiving portion and inserting the beam and the wall together by placing a mold on top of the wall and a bottom plate and pouring the concrete so that the alternating wall and the beam are surely connected As a result, mold height is reduced, construction is easy, and construction cost is reduced.

As described above, by using the attachment of the present invention, a beam attached with an attachment to both ends of the beam is mounted on the upper part of the alternating wall, and concrete is placed on the upper and lower walls of the alternating wall to rigidly joint the ends of the wall and the beam , It is possible to construct various types of structures which are advantageous for maintenance by reducing the mold height and eliminating the calibration device.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, with reference to the accompanying drawings, a description will be made of a binding attachment of an alternating wall and a concrete beam end according to a preferred embodiment of the present invention.

As shown in FIG. 4, the attachment 200 attached to and fixed to the side of the beam end portion is an attachment of the beam, which acts to firmly connect the beam and the alternating wall. As shown in FIGS. 4, 5A, and 5B, 200 comprises a continuous plate 202, a plurality of stud bolts 206, a plurality of through holes or grooves 208, and a plurality of bolt holes 204. A plurality of stud bolts 206 are welded to the left and right sides of the continuous plate 202. A plurality of bolt holes 204 are formed in a part of the flexible plate 202 and a through hole or a through hole 208 ) Can be installed. It is also possible to use an angle or U-shaped steel in place of the stud bolt 206 as a shearing mechanism. The attachment 200 is fastened and fixed to the bolt 110 buried in a protruding attachment form on the end of the beam 100 through the bolt hole 204. Further, a horizontal reinforcing bar (not shown) penetrates through the through hole or through-hole 208 of the flexible plate 202 after the beam is fixed. The pivot plate 202, the plurality of stud bolts 206, and the plurality of bolts 110 serve to break the alternating wall and the concrete beam to be described later.

8 is a flowchart for explaining a method of constructing a ramen bridge using a beam having the attachment of the present invention. A method of constructing a ramen bridge using a beam having the attachment of the present invention will be described with reference to the flowchart of FIG.

Referring to FIG. 8, a method of constructing a rammen bridge using a beam equipped with an attachment of the present invention comprises the steps of: preparing an attachment and attaching and fixing an attachment to the beam end (S80); A step (S82) of constructing each alternate wall in such a form that a support part is provided on the upper part of the alternating wall and the vertical reinforcing steel is projected; (S84) of mounting the beam on the receiving unit and inserting the horizontal reinforcing bar through a through hole or a through groove (208) formed in the attachment; And a step (S86) of installing the beams on the upper and lower walls and pouring the concrete to integrate the beam and the wall.

Figures 2a and 2b show alternate wall solid views of the ramen bridge of the present invention. In order to construct the ramen bridges of the present invention, as shown in Figs. 2A and 2B, alternating walls are provided at the starting point and the end point of a bridge such as a ramen bridges. The alternating wall is composed of a columnar alternation 20 consisting of a base bottom plate 22 and a column 24 and a top wall 26 and a bottom bottom plate 22 ' (20 '). ≪ / RTI > The alternating walls 20 and 20 'are composed of the bottom plates 22 and 22' and the upper walls 26 and 26 ', and are constructed as soon as the beams are mounted.

During the wall construction, the vertical reinforcing bars 28 and 28 'connected to the walls 20 and 20' are protruded from the walls to form the receiving portions 30 as shown in FIGS. 2A and 2B. A hook 32 is attached to the lower end of the receiving unit 30 and is firmly fixed to the wall. The steel pipe receiving unit 30 serves to temporarily support the upper end of the wall including the weight of the beam and the bottom plate concrete When concrete is poured, it is buried. A steel pipe, a steel bar, a steel plate, an H-shaped steel or the like can be preferably used as the material of the receiving portion 30. [ However, the material of the receiving portion 30 can be used regardless of the material, as long as it acts as a spacer for putting the concrete between the beam and the alternating portion so that the concrete is poured alternately with the beam. Wood can also be used. The hooks 32 serve to increase the binding force when the concrete is placed in the alternating wall by the reinforcing bars.

In addition, the vertical reinforcing bars 28 and 28 'protruding from the upper ends of the walls 20 and 20' are connected to the upper reinforcing bars to serve the moment of the right corner. The connecting method is screw connection, And so on.

Next, as shown in FIG. 6, the beam 100 to which the attachment 200 is attached is mounted on the upper end of the wall 20, 20 'of the alternate 2. The attachment 200 is manufactured at the factory or at the yard. 4, the attachment 200 is connected to the beam end by a bolt fastening method of a bolt hole 204 formed in the attachment 200 and a bolt 110 formed in the beam end, And an attachment 200 is provided in the attachment portion.

Also, instead of attaching the attachment 200 to the beam, the attachment 200 may be installed in the formwork to form the beam in an integrated state.

7, the attachment 200 is mounted on the upper end of the wall 20 so that the end of the attachment 200 is inserted or abutted in the vertical reinforcing bar. At this time, a stopper or the like may be provided at the lower end of the mounted beam to prevent the beam from moving.

7, the horizontal reinforcing bar 210 is inserted through the through-hole or the through-hole 208 of the attachment 200. As shown in FIG. At this time, it is preferably installed in contact with the vertical reinforcing bars (28, 28 '). Next, the bottom plate form is installed without using the wall formwork and the beam outside the wall 20, and the concrete is poured into the top of the wall and the bottom plate.

Hereinafter, with reference to FIGS. 9A to 9D, it is assumed that the attachment 200 is compared with the combined beam in detail.

Figs. 9A and 9B show a case where beams are directly connected without attachments, and Figs. 9C and 9D are general diagrams in which a wall and a beam are connected using an attachment. 9A, when the bending moment (flexural load) 5 acts on the beam 1, the end of the beam has a shear shape of the beam end so that the beam end and the front end of the alternating wall 2 It is difficult to expect a sufficient restraining effect because of the connection effect and the bonding force.

On the other hand, when the attachment 200 is used as shown in FIG. 9C, the attachment area to be coupled with the wall 20 by the attachment 200 is greatly increased, and the adhesion of the stud bolt 206 So that the end of the beam 100 becomes integral with the wall 20. That is, the vertical reinforcement bars 28 and 28 'projected from the alternating (2) wall 20 and the horizontal reinforcement bars 210 passing through the continuous plate 202 and the continuous plate 202 of the attachment 200 are reinforced As a result, the wall and the beam move together. Therefore, even when a bending moment (flexural load) 50 acts on the beam 100, a sufficient restraining effect between the beam end and the alternate wall due to the binding force of the attachment 200 can be expected.

Next, the schematic structure of the simple bridge type and the ramen bridge type of the present invention will be compared with reference to FIGS. 10A and 10B. 10A, only the moment P is generated in the beam during the load operation. In the ramen bridge type of FIG. 10B, however, the load is distributed to the beam center portion and the end portion due to the constraining effect of the both end walls 20, (P), and the beam end (N) is divided into two parts. Therefore, since the bending moment value of the asphalt pavement load or live load, which is the overhead load after the wall 20 and the beam 100 are folded, is reduced to about 1/2 of a simple bridge, And the bridge device 10a is eliminated, so that bridge management becomes easier.

As described above, by using the attachment according to the present invention, the concrete beam is broken on the alternating wall body, so that the construction is simple and the connection effect with the alternating wall body is excellent. In addition, after the alternating wall and the beam are connected, since the secondary dead load and the live load, which are operated afterwards, are supported by the beam of smaller cross section, various types of structures can be constructed at low cost.

Also, installation of the attachment is a connection method in which a pre-manufactured attachment is attached to a beam end portion using a bolt in the field, so that the construction is good.

Further, the attachment embedded in the upper portion of the wall serves to integrate the beam end with the wall by the effect of enlarging the attachment area and the effect of the stud bolts installed on the reinforcing plate. That is, the reinforcing plate and the stud bolt protruding from the alternating wall, the attachment reinforcing plate and the stud bolt, and the horizontal reinforcing bar penetrating through the end of the reinforcing plate reinforce the shear reinforcement.

The present invention effectively bends the beam and the wall to secure the bending stiffness at the connection portion, which reduces the height of the conventional simple beam bridge and eliminates the need for a coaxial apparatus, facilitating maintenance and greatly reducing the material cost and construction cost.

In addition, the present invention is a technology excellent in application not only to the raymen bridge but also to the urban area construction where the river flow and the traffic volume are large.

2 ... shift 20, 20 '... wall
22, 22 '... foundation bottom 24, 24' ... pillars
28, 28 '... vertical rebar 30 ... base
32 ... hook 100 ... concrete beam
110 ... bolt 200 ... attachment
202 ... straight plate 204 ... bolt hole
206 ... Stud bolt 208 ... Through hole or through hole
210 ... horizontal rebar

Claims (10)

delete delete delete In a method of constructing a concrete structure,
In order to engage the ends of the alternating walls 20 and 20 'and the concrete beam 100, one end is attached to the end of the beam so that a bolt projectingly attached to the side of the beam is inserted and the other end is connected to the end of the beam A plurality of stud bolts 206 protruding from the side of the soft plate 202 except a side directly attached to the beam, a plurality of stud bolts 206 protruding from the beam, A plurality of bolt holes 204 formed in the pivoting plate 202 so that the pivoting plate 110 is inserted and attached to the pivoting plate 202 and a through hole through which the horizontal reinforcing bar 210 is inserted through the end of the pivoting plate 202, (S80) of attaching and fixing the attachment (200) to the end of the concrete beam by manufacturing an attachment (200) having a through hole (208);
A step (S82) of constructing each alternate wall in such a form that the receiving portion (30) is provided at the upper end of the alternating wall and the vertical reinforcing bars (28, 28 ') are projected;
The step (S84) of mounting the beam 100 on the receiving portion 30 and inserting the horizontal reinforcing bar 210 through a through hole or a through groove 208 formed in the attachment 200; And
The step S86 of mounting the beam 100 on the receiving unit 30 and integrating the beam 100 and the walls 20 and 20 'by installing the concrete on the upper and lower walls of the wall A method of constructing a concrete structure. 5. The method according to claim 4, wherein the attaching and fixing step (S80) is performed in a state where the attachment separately manufactured at the time of beam manufacturing is installed in a mold and integrated with the beam.
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