KR20210076836A - Girder structure and construction method for continuity of supporting portion of girder using the same - Google Patents

Abstract

Disclosed is a girder structure, comprising: a girder body; a buried member for connection having a lower part which is inserted and fixed to the lower side of the upper surface of a longitudinal one end of the girder body and an upper part which is bent and extended toward a neighboring girder structure adjacent to the girder structure on one side in the longitudinal direction; and a support member extending in a transverse direction to support the inside of the bent portion of the buried member for connection, wherein the longitudinal one end of the upper part of the buried member for connection may be connected to the other end of the buried member for connection of the neighboring girder structure for continuation between the girder structure and the neighboring girder structure. Accordingly, the girder structure enables efficient continuation of a supporting portion of a girder with high constructability, thereby reducing the positive moment of a slab load acting on the girder.

Description

Girder structure and method for continuous construction of girder branch using same {GIRDER STRUCTURE AND CONSTRUCTION METHOD FOR CONTINUITY OF SUPPORTING PORTION OF GIRDER USING THE SAME}

The present application relates to a girder structure and a continuous construction method of a girder branch using the same.

Conventionally, when constructing a bridge, girders are mounted on abutments and piers, and between the girders facing longitudinally on the piers and the neighboring girders are simply cast on site with concrete, and floor plate (slab) concrete is cast on site. However, in this case, since the girder bears the load of the floor plate in the unhardened concrete state in the simple beam state, the static moment applied to the girder could be large, and accordingly, the mold height and the amount of steel dose (for example, prestressing The steel dose of the applied bridge) was increased.

To compensate for this, the girder is mounted on the abutment and the pier, and the reinforcing bar of the girder and the reinforcing bar of the neighboring girder are connected to each other in the part between the girder and the neighboring girder facing longitudinally on the pier. A technology of pouring concrete on the floor plate after continuation has been disclosed. However, according to this technique, since the reinforcing bars of the girder and the reinforcing bars of the neighboring girder have to be connected within a rather narrow and deep space between the girder and the neighboring girder, there was an aspect that the workability was deteriorated.

The background technology of the present application is disclosed in Korean Patent Application Laid-Open No. 10-2009-0116606.

The present application is intended to solve the problems of the prior art described above, and it is possible to serialize the branch parts efficiently with high workability compared to the prior art, and thereby reduce the static moment of the load of the deck plate acting on the girder to lower the mold height of the girder or An object of the present invention is to provide a girder structure capable of reducing required materials and a continuous construction method of a girder branch using the same.

However, the technical problems to be achieved by the embodiment of the present application are not limited to the technical problems as described above, and other technical problems may exist.

As a technical means for achieving the above technical problem, a girder structure according to an aspect of the present application, a girder body; The lower part is inserted and fixed to the lower side of the upper surface of one end of the girder body in the longitudinal direction, the upper part is bent in a direction toward the neighboring girder structure in the longitudinal direction with respect to the girder structure extending in the direction; And a support member extending in the transverse direction to support the inside of the bent portion of the embedding member for the connection, wherein the longitudinal one end of the upper part of the embedding member for the connection is the continuation of the girder structure and the neighboring girder structure For this, it may be connected to the other end of the embedding member for connection of the neighboring girder structure.

A continuous girder point part construction method according to an aspect of the present application, a girder point part continuous construction method using a girder structure according to an aspect of the present application, comprises the steps of: (a) preparing the girder structure and the neighboring girder structure; (b) disposing the girder structure and the neighboring girder structure so that one longitudinal end of the girder structure and the other longitudinal end of the neighboring girder structure are opposite to the longitudinal direction on the pier; and (c) connecting (stiffening) the girder structure and the neighboring girder structure to continuous branching.

The above-described problem solving means are merely exemplary, and should not be construed as limiting the present application. In addition to the exemplary embodiments described above, additional embodiments may exist in the drawings and detailed description.

According to the above-described problem solving means of the present application, since the girder structure and the neighboring girder structure can be made continuation by the connection between the embedded reinforcement for connection, the girder structure bears the load of the floor plate in a continuous beam state, so it is simple Compared to the beam state, the positive moment in the middle of the girder can be reduced as negative moment is generated due to continuation at the branch, so economical efficiency that can reduce the height of the girder or the amount of material required (eg, steel dose) This can be secured.

In addition, according to the problem solving means of the present application described above, the upper part of the embedded reinforcement for connection of the girder structure is bent and extended in the direction toward the neighboring girder structure and can be connected with the embedded reinforcement for connection of the neighboring girder structure, so between the embedded reinforcement for connection Since the connection can be made from the upper side of the girder structure, not between the girder structure and the neighboring girder structure, the embedded member for connection can be easily connected, and thus the connection between the longitudinal reinforcing bars between the girder structure and the neighboring girder structure is Since the number of omitted or connected can be reduced, constructability can be secured.

1 is a schematic longitudinal cross-sectional view of a girder structure according to an embodiment of the present application and a connected portion of a neighboring girder structure in order to explain a girder structure according to an embodiment of the present application.
FIG. 2 is a schematic cross-sectional view taken along line AA of FIG. 1 .
3 is a connection part of a girder structure and a neighboring girder structure according to an embodiment of the present application for explaining the connection between the longitudinal reinforcing bars of the girder structure according to an embodiment of the present application, the bending of the lower part of the embedding member for connection, etc. It is a schematic longitudinal cross-sectional view.
Figure 4 is a schematic longitudinal cross-sectional view of the connecting portion of the girder structure and the neighboring girder structure according to an embodiment of the present application for explaining the bending of the lower portion of the embedding member for the connection of the girder structure according to an embodiment of the present application.
FIG. 5 is a schematic cross-sectional view of BB of FIG. 4 .
6 is a schematic perspective view of a supporting member having a closed cross-section of a girder structure according to an embodiment of the present application.
7 is a schematic perspective view of a support member having a closed cross-section of a girder structure according to an embodiment of the present application when viewed from an angle different from FIG. 6 .
8 is a schematic perspective view of a supporting member having a cross-section in which at least a portion of the girder structure is opened according to an embodiment of the present application.
Figure 9a is a schematic conceptual perspective view for explaining the longitudinal reinforcement inserted into the groove and the grooved support member of the girder structure according to an embodiment of the present application.
Figure 9b is a schematic perspective view of a support member in which longitudinal reinforcement is inserted into the groove of the girder structure according to an embodiment of the present application.
10 is a schematic side view of a support member having longitudinal reinforcement inserted into the groove of the girder structure according to an embodiment of the present application.
11A and 11B are schematic perspective views for explaining a method of manufacturing a support member in which a groove of a girder structure is formed according to an embodiment of the present application.
12 and 13 are schematic longitudinal sectional views for explaining the steps of arranging the girder structure and the neighboring girder structure of the girder point part continuous construction method according to an embodiment of the present application.
Figure 14 is a schematic longitudinal section for explaining the step of connecting one end of the embedding member for the connection of the girder structure and the other end of the embedding member for the connection of the neighboring girder structure of the girder point part continuation construction method according to an embodiment of the present application; It is also
FIG. 15 is a schematic cross-sectional view of CC of FIG. 14 .
16 is a schematic conceptual diagram for explaining the generation of a negative moment according to the continuous construction method of the girder point part according to an embodiment of the present application.

Hereinafter, embodiments of the present application will be described in detail with reference to the accompanying drawings so that those of ordinary skill in the art to which the present application pertains can easily implement. However, the present application may be embodied in several different forms and is not limited to the embodiments described herein. And in order to clearly explain the present application in the drawings, parts irrelevant to the description are omitted, and similar reference numerals are attached to similar parts throughout the specification.

Throughout this specification, when a part is "connected" to another part, it is not only "directly connected" but also "indirectly connected" or "electrically connected" with another element interposed therebetween. "Including cases where

Throughout this specification, when it is said that a member is positioned "on", "on", "on", "under", "under", or "under" another member, this means that a member is positioned on the other member. It includes not only the case where they are in contact, but also the case where another member exists between two members.

Throughout this specification, when a part "includes" a certain component, it means that other components may be further included, rather than excluding other components, unless otherwise stated.

In addition, in the description of the embodiments of the present application, terms related to directions or positions (upper, upper, lower, lower, longitudinal, longitudinal end, other longitudinal end, lateral direction, etc.) It is set based on the placement status. For example, when looking at FIG. 1 , the 12 o'clock direction is generally the upper side, the overall 12 o'clock direction is the upper side, the 6 o'clock direction is generally the lower side, the overall 6 o'clock direction is the lower side, the overall 3 The o'clock and 9 o'clock direction may be the longitudinal direction, the end generally facing the 3 o'clock direction may be one longitudinal end, and the end generally facing the 9 o'clock direction may be the other longitudinal end. In addition, referring to FIG. 2 , the overall 3 o'clock-9 o'clock direction may be a horizontal direction or the like. Also, for reference, the longitudinal direction may mean a longitudinal direction in which the bridge extends.

The present application relates to a girder structure and a continuous construction method of a girder branch using the same.

First, a girder structure (hereinafter referred to as 'bone girder structure') 1 according to an embodiment of the present application will be described.

1 is a schematic longitudinal cross-sectional view of a part continuous with a neighboring girder structure of a girder structure according to an embodiment of the present application to explain a girder structure according to an embodiment of the present application, FIG. 2 is a schematic view of AA of FIG. It is a cross section.

1 and 2 , the present girder structure 1 includes a girder body 11 . The girder body 11 may be a PSC (PreStressed Concrete) girder type or a reinforced concrete girder type, but is not limited thereto, and may be any one of various girder types applicable to the present disclosure. As another example, the girder body 11 may be a steel girder type. In addition, the girder body 11 may be a girder to which prestressing by a steel wire is applied. In addition, the girder body 11 may be a precast (precast) girder pre-fabricated in a factory or a separate manufacturing site other than the field.

In addition, referring to FIG. 1 , the present girder structure 1 includes an embedding member 12 for connection. The embedding member for connection 12 is inserted and fixed to the lower side of the upper surface of one end of the longitudinal end of the girder body 11, and the neighboring girder structure (1') adjacent to the girder structure (1) viewed from the upper side in the longitudinal direction. is bent and extended in the direction toward the

For example, referring to FIG. 1 , the lower portion of the embedding member 12 for connection may extend downward in the girder body 11 . At this time, the embedding member 12 for connection may have an insertion length greater than or equal to the fixing length and be fixed in the form of being inserted into the girder body 11 to be fixed.

3 is a connection part of a girder structure and a neighboring girder structure according to an embodiment of the present application for explaining the connection between the longitudinal reinforcing bars of the girder structure according to an embodiment of the present application, bending of the lower portion of the embedding member for connection, etc. It is a schematic longitudinal cross-sectional view, and Figure 4 is a schematic view of a part of the girder structure and the neighboring girder structure connected according to an embodiment of the present application for explaining the bending of the lower portion of the embedded member for connection of the girder structure according to an embodiment of the present application It is a longitudinal cross-sectional view, and FIG. 5 is a schematic cross-sectional view of BB of FIG. 4 .

3 and 4, a portion inserted into the girder body 11 of the embedding member 12 for connection may be bent. For example, depending on the shape of the girder structure 1, the fixing length of the embedding member 12 for the connection to the girder body 11 is not secured when the lower part of the embedding member 12 for connection extends only downward. can't Referring to FIG. 5, the connecting embedding member 12 (for example, in FIG. 5, in the transverse direction (3 o'clock - 9 o'clock direction) is the outermost side disposed in the low-profile part of the girder (for example, the girder flange part). The embedding member 12 for connection disposed in the fixing length may not be secured. In this case, the lower portion of the embedding member 12 for connection may be bent in a direction other than downward.

Illustratively, referring to FIG. 3 , the lower portion of the embedding member 12 for connection may be bent into a hook shape (a letter “U” shape extending downward and then bending and extending upward again). Or as another example, referring to FIG. 4 , the part (lower part) inserted into the girder body 11 of the embedding member 12 for connection may be bent (bent) so that the end thereof extends to the other side in the longitudinal direction. Referring to FIG. 4 as a specific example, the portion (lower) inserted into the girder body 11 of the embedding member 12 for connection is obliquely inclined in the vertical downward or the other longitudinal direction (for example, an inclination of 45°) It may be extended downwardly, and then bent again to the other side in the longitudinal direction, so that the end thereof may be provided to face the other side in the longitudinal direction.

In addition, when the girder body 11 includes a concrete part (for example, PSC girder type or reinforced concrete (RC) girder type), the lower portion of the embedding member 12 for connection may be embedded in the concrete part. In addition, when the girder body 11 is a steel girder type, the embedding member 12 for connection may be fixed to the girder body 11 by welding, bolting, or the like.

In addition, referring to FIG. 1 , the embedding member 12 for connection of the present girder structure 1 has an upper portion protruding upward of the girder body 11 and facing the neighboring girder structure 1 ′ (longitudinal one side direction). ) can be bent.

The embedding member 12 for connection may be a bar-shaped member that extends long in the longitudinal direction and is bent at least once or more. For example, the embedding member 12 for connection may be a reinforcing bar. More preferably, the embedding member 12 for connection may be a deformed reinforcing bar. In this case, the bonding force (attachment) of the embedding member 12 for the connection to the concrete portion of the girder body 11 or the concrete portion of the bottom plate (slab) may be increased.

In addition, the longitudinal one end of the upper part of the embedding member for connection 12 is for the continuation of the present girder structure 1 and the neighboring girder structure 1', the embedding member 12 for the connection of the neighboring girder structure 1'. is connected to the other end (the other end of the upper part) of In this way, the present girder structure 1 can be connected by the adjacent girder structure 1 and the embedding member 12 for each connection, so that they can be continuous.

For example, one end of the embedding member 12 for connection and the other end of the embedding member 12 for connection of the neighboring girder structure 1' may be connected through welding or coupling. For example, referring to FIGS. 1 and 2 , the other end of the welding reinforcing bar 14 is welded to one end of the embedding member 12 for connection of the present girder structure 1, and the neighboring girder structure 1') By welding one end of the welding reinforcing bar 14 to the other end of the embedding member 12 for the connection, one end of the embedding member 12 for connection and the embedding member 12 for the connection of the neighboring girder structure 1' The other end may be welded by a welding reinforcing bar 14 .

According to the above-mentioned bar, the present girder structure 1 and the neighboring girder structure 1' are the longitudinal one end of the connecting embedding member 12 that protrudes to the upper side of the girder body 11 and is bent and the neighboring girder structure 1' ) of the girder body 11, by being connected to the other longitudinal end of the protruding and bent connection embedding member 12, it can be connected.

Accordingly, unlike the method in which the reinforcing bars of the girder (longitudinal reinforcing bars) and the reinforcing bars of the neighboring girder are connected in the gap between the conventional girder and the neighboring girder, according to the present girder structure 1, the upper side of the main girder structure 1 Since the connection of the embedding member 12 for the connection of the girder structure 1 and the embedding member for the connection of the neighboring girder structure 1' can be made, the connection between the embedding member 12 for connection can be made more easily have.

In addition, the longitudinal reinforcement 111 of at least a part of the girder structure 1 viewed between the girder body 11 of the present girder structure 1 and the girder body 11 of the neighboring girder structure 1' and the neighboring girder structure Even if the connection of at least a part of the longitudinal reinforcing bar 111 of (1') is made, as described above, the embedding member 12 for connection from the upper side of the main girder structure 1 and the neighboring girder structure 1' Since the connection is made, the number of connections between the longitudinal reinforcing bars 111 between the girder body 11 of the present girder structure 1 and the girder body 11 of the neighboring girder structure 1' can be reduced. Accordingly, efficient construction can be achieved.

In addition, referring to FIG. 3 , at least a portion of the longitudinal reinforcement 111 may be exposed. For example, at least a portion of the longitudinal reinforcement 111 may be exposed to the outside (eg, the upper side) of the girder body 11 . In this case, the girder body 11 may be formed with a block-out portion 112 exposing at least a portion of the longitudinal reinforcement 111 to the outside (upper side). The block-out part 112 may be formed in a form in which at least a portion of the upper surface of the girder body 11 is depressed downward or in a stepped form. In addition, the exposed longitudinal reinforcement 111 may be connected to the exposed longitudinal reinforcement 111 of the neighboring girder structure (1'). The connection between the longitudinal reinforcing bars 111 may be made by welding, a coupler, or the like, and FIG. 3 shows that the connection between the longitudinal reinforcing bars 111 is made by welding by the welding reinforcing bar 14 .

In addition, referring to FIG. 3 , a portion inserted into the girder body 11 of the longitudinal reinforcing bar 111 may be bent. This may be in order to secure the fixing length of the longitudinal reinforcing bar 111 . Since this configuration corresponds to the configuration in which the part inserted into the girder body 11 of the above-described embedding member 12 for connection is bent, a detailed description thereof will be omitted.

6 is a schematic perspective view of a supporting member having a closed cross-section of a girder structure according to an embodiment of the present application, and FIG. 7 is a closed girder structure according to an embodiment of the present application viewed from an angle different from FIG. It is a schematic perspective view of a supporting member having a figure cross-section, and FIG. 8 is a schematic perspective view of a supporting member having an open cross-section in which at least a portion of the girder structure according to an embodiment of the present application is opened.

In addition, referring to FIG. 1 , the girder structure 1 is provided in the transverse direction to support the inside of the bent portion (bent portion between the upper and lower portions of the embedding member 12 for connection) of the connection embedding member 12 . It includes a supporting member 13 that is arranged to extend. The support member 13 may support the embedding member 12 for connection. Since the connecting embedding member 12 has an upper part bent with respect to the lower part and extended in the longitudinal direction, a tensile force may be applied when a negative moment is generated at the girder point part, and the supporting member 13 is the connecting embedding member 12 ) to prevent the bending state (bent state or angle) from being deformed (changed) by the tensile force, it is possible to support the embedding member 12 for the connection.

Specifically, referring to FIGS. 6 to 8 , the support member 13 may include a tube member 131 having a hollow interior and extending in the transverse direction. 6 and 7 , the tube member 131 may have a closed shape in cross section. Alternatively, referring to FIG. 8 , the tube member 131 may have a cross-section in which at least a portion is opened.

Referring to FIG. 2 , the tube member 131 may be arranged to extend in the transverse direction so that its elongated longitudinal direction is parallel to the transverse direction. Also, referring to FIG. 2 , the embedding member 12 for connection may be arranged in plurality at intervals along the transverse direction with respect to the pipe member 131 extending in the transverse direction as described above.

In addition, as described above, the girder body 11 may be a girder type including reinforcing bars and a concrete part, and referring to FIGS. 1 and 2 , the supporting member 13 (eg, the pipe member 131) is At least a portion may be disposed to be embedded in the concrete portion of the girder body (11). For example, the lower portion of the pipe member 131 may be embedded in the concrete portion of the girder body (11). In addition, a portion of the tube member 131 may be exposed to the outside (eg, the upper side) of the girder body 11 . Accordingly, the pipe member 131 may be fixed to the concrete part of the girder body 11 . In addition, at least a portion of the tube member 131 (eg, the upper portion of the tube member 131) may be embedded in the concrete portion of the bottom plate. In this case, the pipe member 131 may be precast to be embedded in the concrete part of the floor plate.

In addition, the support member 13 (for example, the tube member 131) has an outer peripheral surface portion opposite to the inner side of the bent portion of the embedding member 12 for connection The curved surface of the inner side of the bent portion of the embedding member 12 for connection It may include a curved surface corresponding to the shape. In other words, the tube member 131 is a curved shape in which the outer peripheral surface portion opposite to the inner side of the bent portion of the connecting embedding member 12 engages the curved shape of the inner side of the bent portion of the connecting embedding member 12 and more than a predetermined curved shape. can have For example, when the curved shape of the inner side of the bent portion of the connecting embedding member 12 is a curved surface in which one or more radii of curvature are combined, the inner side of the bent portion of the connecting embedding member 12 of the pipe member 131 and The opposing outer peripheral portion may have a curved shape in which corresponding radii of curvature are combined within an error range.

In addition, referring to FIGS. 6 to 8 , the support member 13 crosses the tube member 131 in the vertical direction, the upper end protrudes upward of the tube member 131 , and the lower end of the tube member 131 . It may include a penetrating member 132 disposed to protrude downward. For example, the penetrating member 132 may be a reinforcing bar. More preferably, it may be a deformed reinforcing bar. In addition, in the tube member 131 , a hole through which the penetrating member 132 can pass may be formed at upper and lower sides thereof so that the penetrating member 132 may be disposed in a transverse state in the vertical direction.

In addition, referring to FIG. 3 , the penetrating member 132 may be disposed so that the lower end thereof is embedded in the girder body 11 . For example, the lower end of the penetrating member 132 may be embedded in the concrete part of the girder body 11 . The penetrating member 132 may serve as a stud that increases the coupling force of the pipe member 131 to the girder body 11 .

In addition, the upper end of the penetrating member 132 protruding upward of the tube member 131 may be embedded in the bottom plate (eg, the concrete part of the bottom plate). Accordingly, the penetrating member 132 may serve as a stud for the bottom plate of the pipe member 131 .

In addition, referring to FIGS. 6 to 8 , the support member 13 may include a cementitious filling part 133 filled in the tube member 131 . Accordingly, the penetrating member 132 may be fixed with respect to the tube member 131 . For example, the support member 13 is formed by disposing the penetrating member 132 with respect to the tube member 131 and filling and curing the material forming the cementitious filling portion 133 in the tube member 131 to form the cementitious filling portion ( 133) can be formed. Alternatively, the penetrating member 132 may be fixed to the pipe member 131 independently (separately) from the cementitious filling part 133 by welding or the like. Here, the material forming the cementitious filling part 133 may be understood as a concept encompassing materials including cement. For example, the cementitious filling part 133 may be formed by filling materials such as concrete, mortar, and cement milk.

In addition, referring to FIGS. 3 and 5 , the supporting member 13 may be disposed such that the pipe member 13 is mounted on the longitudinal reinforcement 111 of the girder body 11 . For example, when precasting (pre-fabrication) of the present girder structure 1, by arranging it in such a way that it is mounted on the longitudinal reinforcing bar 111, the convenience of pre-production can be increased.

Figure 9a is a schematic conceptual perspective view for explaining the longitudinal reinforcement inserted into the groove and the grooved support member of the girder structure according to an embodiment of the present application, Figure 9b is a groove of the girder structure according to an embodiment of the present application It is a schematic perspective view of a supporting member having longitudinal reinforcing bars inserted therein, and FIG. 10- is a schematic side view of a supporting member having longitudinal reinforcing bars inserted into the groove of the girder structure according to an embodiment of the present application, FIGS. 11a and 11b is a schematic perspective view for explaining a method of manufacturing a support member in which a groove of a girder structure is formed according to an embodiment of the present application.

9A to 10 , a groove 1311 recessed from the lower side to the upper side may be formed in the support member 13 to allow the longitudinal reinforcing bar 111 to be inserted. The groove 1311 may be formed to have a width greater than or equal to the diameter of the longitudinal reinforcing bar 111 so that the longitudinal reinforcing bar 111 can be inserted in the transverse direction, and the longitudinal reinforcing bar 111 in the longitudinal direction. The groove 1311 may be formed to be opened so as to pass through the groove 1311 in the longitudinal direction. For example, referring to FIGS. 9B and 10 , the groove 1311 is cut along the longitudinal direction by a predetermined width greater than or equal to the diameter of the longitudinal reinforcing bar 111 so that the longitudinal reinforcing bar 111 can be fitted or engaged. It may be formed in one form.

Also, referring to FIGS. 11A and 11B , the groove 1311 may be formed as follows. Before the cementitious filling part 133 is formed in the pipe member 131, the pipe member 131 is cut to correspond to the groove 1311 of the pipe member 131 (the pipe member of the groove 1311) 131) is formed, and a thickness corresponding to the longitudinal reinforcing bar 111 (that is, a thickness corresponding to the thickness of the longitudinal reinforcing bar 111 (the same thickness considering the error range))) (8) is inserted, the material forming the cementitious filling portion 133 in the tube member 131 is poured (filled), and the plate 8 is removed before the poured material is completely cured, so that the groove 1311 is formed. can be formed. In addition, the groove 1311 is known or developed in the future by various methods (for example, a method of forming the cementitious filling part 133 in the tube member 131 and then performing a cutting process corresponding to the incised groove area. ) can be formed by Accordingly, the support member 13 may be more stably mounted on the longitudinal reinforcing bar 111 by being coupled to the longitudinal reinforcing bar 111 .

Hereinafter, a continuous construction method of a girder branch according to an embodiment of the present application using a girder structure according to an embodiment of the present application (hereinafter referred to as 'this girder branch continuous construction method') will be described. However, since this girder branch continuous construction method uses a girder structure according to an embodiment of the present application salpinned above, the same reference numerals are used for the same or similar configuration as described in the girder structure according to an embodiment of the present application. , overlapping descriptions will be simplified or omitted.

The present girder branch continuous construction method includes a step (first step) of preparing the main girder structure 1 and the neighboring girder structure 1'. The present girder structure 1 and the neighboring girder structure 1' may be manufactured in a precast form at a separate manufacturing site. Illustratively, when the girder body 11 of the present girder structure 1 is of the PSC girder type, the girder body 11 performs processes such as reinforcement, duct installation, formwork installation, concrete pouring, concrete curing and prestress introduction. It can be manufactured in a precast form through In addition, the embedding member 12 and the supporting member 13 for the connection of the present girder structure 1 may be disposed in the middle of the process in which the girder body 11 is precast. Illustratively, the embedding member 12 and the supporting member 13 for the connection may be disposed at a preset position before the concrete pouring process proceeds.

In addition, referring to FIGS. 12 and 13 , in this girder point part continuous construction method, one longitudinal end of the girder structure 1 and the other longitudinal end of the neighboring girder structure 1 ′ are longitudinal on the pier 9 . and disposing the girder structure 1 and the neighboring girder structure 1' (second step) so as to be opposite to each other.

Figure 14 is a schematic longitudinal section for explaining the step of connecting one end of the embedding member for the connection of the girder structure and the other end of the embedding member for the connection of the neighboring girder structure of the girder branch continuous construction method according to an embodiment of the present application; FIG. 15 is a schematic cross-sectional view of CC of FIG. 14 .

The present girder branch continuous construction method includes a step (third step) of connecting (strengthening) the main girder structure 1 and the neighboring girder structure 1' to form a continuous branch.

Specifically, referring to FIGS. 14 and 15 , the third step is welding or coupling one end of the embedding member 12 for connection and the other end of the embedding member 12 for connection of the neighboring girder structure 1 ′. It may include a step of connecting through (step 3-1).

In addition, referring to FIGS. 1 and 2 , the third step includes a portion in which the connection embedded member 12 of the present girder structure 1 and the connection embedded member 12 of the neighboring girder structure 1 ′ are connected. It may include a step (step 3-2) of pouring concrete corresponding to the area to be used. For example, in step 3-2, concrete is poured so that a bottom plate (slab) is formed, and the embedding member 12 for connection of the present girder structure 1 and the embedding member for connection of the neighboring girder structure 1' are embedded. A portion to which the member 12 is connected (eg, between the main girder structure 1 and the neighboring girder structure 1') may be poured. If necessary, for the performance of step 3-2, a formwork may be installed before step 3-2.

In addition, the process (work) of pouring the floor plate (slab) concrete can be performed separately from this after the process of pouring concrete between the main girder structure 1 and the neighboring girder structure 1' with concrete is performed. . However, according to the present application, since the present girder structure 1 and the neighboring girder structure 1' can be connected (step 3-1) by the embedded reinforcing bar 12 for connection, when performing step 3-2 , Concrete pouring between the present girder structure 1 and the neighboring girder structure 1' and concrete pouring for the formation of a floor plate can be simultaneously performed through one process. As such, according to the present application, concrete pouring between the main girder structure 1 and the neighboring girder structure 1' and concrete pouring for forming a floor plate can be simultaneously performed, reducing air and improving workability compared to the prior art. can be secured.

16 is a schematic conceptual diagram for explaining the generation of a negative moment according to the continuous construction method of the girder point part according to an embodiment of the present application.

Referring to FIG. 16 , in the related art, between the girder and the neighboring girder was simply cast on-site with concrete and the floor plate (slab) concrete was cast on-site. Accordingly, the girder bears the load of the floor plate in the state of a simple beam, and the static moment can be large. Accordingly, there is a problem that the mold height and the amount of material required (eg, the amount of steel) increase.

On the other hand, according to the present application, the continuation of the girder can be made by the connection between the main girder structure 1 and the neighboring girder structure 1' for connection between the embedded reinforcing bars 12, and the present girder structure 1 is a continuous beam. It bears the load of the floor plate in the state of being, and as a negative moment occurs at the branch, the positive moment generated at the middle of the girder may decrease, reducing the length of the girder or reducing the amount of material required (eg, steel dose). can be reduced For example, according to the present application, the amount of steel wire can be reduced by 15% compared to the same height, and the height of the steel wire can be reduced by 15% compared to the same height.

The foregoing description of the present application is for illustration, and those of ordinary skill in the art to which the present application pertains will understand that it can be easily modified into other specific forms without changing the technical spirit or essential features of the present application. Therefore, it should be understood that the embodiments described above are illustrative in all respects and not restrictive. For example, each component described as a single type may be implemented in a dispersed form, and likewise components described as distributed may be implemented in a combined form.

The scope of the present application is indicated by the following claims rather than the above detailed description, and all changes or modifications derived from the meaning and scope of the claims and their equivalents should be construed as being included in the scope of the present application.

1: girder structure
1': neighbor girder structure
11: girder body
111: longitudinal reinforcement
112: block out part
12: embedded member for connection
13: support member
131: tube member
133: cementitious filling part
1311: Home
9: Pier

Claims (6)

In the girder structure,
girder body;
The lower part is inserted and fixed to the lower side of the upper surface of one end of the girder body in the longitudinal direction, the upper part is bent in the direction toward the neighboring girder structure in the longitudinal direction with respect to the girder structure extending in the direction; and
Comprising a support member extending in the transverse direction to support the inside of the bent portion of the embedding member for connection,
The longitudinal one end of the upper part of the embedding member for connection is connected to the other end of the embedding member for connection of the neighboring girder structure, for continuation of the girder structure and the neighboring girder structure,
The girder body is of a girder type comprising a reinforcing bar and a concrete part, a girder structure. According to claim 1,
The support member, at least a part of the girder structure will be arranged so as to be embedded in the concrete portion of the girder body. According to claim 1,
The support member, the outer peripheral portion opposite to the inner side of the bent portion of the embedding member for connection includes a curved surface corresponding to the curved surface shape of the inner side of the bent portion of the embedding member for connection, girder structure. According to claim 1,
One end of the embedding member for the connection and the other end of the embedding member for the connection of the neighboring girder structure will be connected through welding or coupling, the girder structure. As a method of continuous construction of girder points using the girder structure according to claim 1,
(a) preparing the girder structure and the neighboring girder structure;
(b) disposing the girder structure and the neighboring girder structure so that one longitudinal end of the girder structure and the other longitudinal end of the neighboring girder structure are opposite to the longitudinal direction on the pier; and
(c) connecting the girder structure and the neighboring girder structure, comprising the step of continuous branching, girder branch continuous construction method. 6. The method of claim 5,
The step (c) is,
(c1) connecting one end of the embedding member for connection and the other end of the embedding member for connection of the neighboring girder structure through welding or coupling; and
(d2) the girder branch continuous construction method comprising the step of pouring concrete in response to the area including the part where the connection embedded member of the girder structure and the connection embedded member of the neighboring girder structure are connected.

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