KR101293646B1 - Bridge construction method using arch support connection member - Google Patents

Abstract

PURPOSE: A bridge construction method using a supporting point connection member is provided to improve the connection rigidity of a continuous supporting point and to facilitate the serialization of various cross-sectional shapes of the girders. CONSTITUTION: A bridge construction method using a supporting point connection member comprises the following steps: constructing the pillar part (421) of a bridge post (420) on the ground and laterally installing a stepped coping part (300); installing girders (200) on the top surface of the stepped part to adjacently place the girders with respect to each other in a continuous supporting point; interconnecting and serializing adjacent girders on both lateral sides of the stepped coping part using an arch type supporting point connection member (100); and applying supporting point concrete (C) in the continuous supporting point and composing both girders, the stepped coping part, and the arch type supporting point connection member.

Description

Bridge construction method using arcuate point connection member {BRIDGE CONSTRUCTION METHOD USING ARCH SUPPORT CONNECTION MEMBER}

The present invention relates to a bridge construction method using the arcuate branch connection member. More specifically, the present invention relates to a multi-span bridge construction method capable of effectively continuizing various girders such as U type girders, PSC girders, and U type steel boxes in stepped coping portions of continuous points.

Recently, a prefabricated pier construction method has been developed and used in the factory to manufacture precast pier segments and to assemble them in the field.

Since these segments are manufactured in a certain place, they are advantageous for manufacturing high-quality members because they are easy to control quality, and because segments can be continuously produced, they are advantageous only for formwork, and segment production can be performed in parallel with foundation work. The air can be shortened.

Therefore, in the field, after constructing the foundation concrete including foundation trench from the top of the terrain, the pier and upper structures (coping, girder, top plate, etc.) made of a plurality of segments are sequentially raised by crane or crane, and then assembled. The bridge will be constructed in this way.

When the bridge is constructed by the prefabricated method, the bridge and the upper structure (coping, girder, top plate, etc.) of each segment are lifted by a crane or a crane. have. Therefore, many methods for reducing the load on the segment have been devised.

In particular, in the case of piers, since the column part receives mainly a compressive load and the coping part receives a bending load, the cross section of the coping part is large in most cases.

Accordingly, there have been attempts to reduce the size of the coping portion within a range where the load-bearing capacity of the coping portion is not degraded.

Accordingly, as shown in FIGS. 1A and 1B, the steel wire 33 is embedded in the upper portion and the lower portion 34 is formed in the lower portion of the vertical wall portion 31 and the vertical wall portion 31 in the longitudinal direction. The coping part 30 of the bridge which consists of the support part 32 in which one side part of the girder 40 is settled is introduced.

That is, in the conventional coping part, leaving only the support part 32 and removing the remaining parts, introducing the hollow 35 into the abdomen of the coping part 30 and receiving a compression force at the bottom of the coping part 34. In addition, a coping part construction method for installing a coping part in a segmented manner in the column part by arranging the steel wire 33 at the upper end of the coping part is introduced.

Such a pier may be referred to as a largely no-coping bridge because the conventional coping portion may be omitted.

At this time, when constructing the non-coping bridge in multiple spans, it is necessary to continually girder 40 from each other in the axial direction (longitudinal direction) in the continuous point portion (pier installation portion), which is introduced in FIG. 1C. .

That is, as a bridge having a continuous point portion in which the girder 12 arranged in the axial direction with the coping portion 11 formed on the upper portion of the pier pillar 20 and supporting the concrete bottom plate of the upper portion is rigid,

In the continuous point portion, the coping portion 11 is formed of a stepped coping portion having a concave stepped portion 11a formed at both sides in the axial direction of an upper end thereof, and a rod is inserted into the stepped coping portion 11a in the axial direction. A through hole is formed,

The girder 12 lying on both sides of the coping portion 11 in the axial direction has a cutout portion 13 corresponding to the stepped portion of the stepped coping portion, and a coupling plate 14 having a through hole formed therein. It is integrally provided at the end of the girder in the axial direction perpendicular to the

The end of the girder is placed in the stepped portion of the stepped coping portion so that the stepped portion 11a and the cutout portion 13 engage with both sides of the stepped coping portion in the axial direction, and the coupling rod 15 penetrates the coping portion 11. After being disposed through the hole formed in the ball and the coupling plate 14, the fastening member is coupled and fixed to the end of the coupling rod at the rear of the coupling plate 14, so that the stepped coping portion 11a and the girder 12 are integrally formed. To be combined.

As a result, it can be seen that the girder adjacent to each other by the coupling rod 15 formed in the stepped coping portion 11a at the continuous point portion to be continuous.

However, this method is particularly limited in use because the girders are suitable for steel plate girders and could not play a significant role in enhancing continuous point connection stiffness.

Therefore, in the non-copping bridge in which the girder is installed on the stepped coping portion in the continuous point portion, the girder having various cross-sectional shapes such as U-shaped girder, PSC girder, and U-shaped steel box girder can be easily continuous. The problem to be solved to provide a bridge construction method using an arcuate point connecting member that can be improved while still being connected to the continuous point.

Accordingly,

First, the arcuate branch connection member is used. The arcuate branch connection member serves to structurally connect both girders adjacent to the continuous branch portion via the stepped coping portion installed on the non-copping bridge.

The arcuate point connection member is to be formed in the panel of the arch shape and the end connection steel is protruded on the end face and the end connection plate is to be further formed on the end connection steel end.

Accordingly, the end connection plate is anchored in the upper flange of the adjacent girders (formed in the support groove) so that the girders can be continuously continuous at the continuous points.

Secondly, the girder connected to each other in the continuous point portion is to cast the point concrete to allow the stepped coping portion, the arcuate point connection member and the girders are combined with each other so that the continuous point portion of the non-coping bridge can be hardened.

To this end, the present invention comprises the steps of installing the pillar portion of the bridge on the ground and the stepped coping portion consisting of a stepped portion extending in both sides of the vertical wall and the vertical wall on the upper surface of the pillar portion to extend in the transverse direction; Installing the girders formed with support grooves derived by exposing the anchor to the upper flange upper surface on the stepped portion is placed so that the girders are adjacent to each other in the continuous point portion: and end connecting steel protrudes from both end surfaces And connecting the arcuate branch connection members having end connection plates formed on the end surfaces of the end connection steels to the upper surfaces of the girders adjacent to each other, thereby continuing the girder with each other.

The connection between the adjacent girder and the arcuate branch connection member is made by allowing the anchor formed in the inner surface of the support groove formed in the girder to pass through the end connecting plate and fastening the anchor to the connecting nut on the back of the end connecting plate. It provides a bridge construction method using an arcuate point connection member.

The present invention is made by constructing the coping portion of the bridge to the precast segment it is possible to construct a non-coping bridge construction more quickly and easy quality control.

In addition, the coping portion is a stepped coping portion is installed so that the girder is mounted on the stepped coping portion, there is no need for bridge support for the girder installation, and the continuous point portion is rigid, no need for expansion joint is possible construction of excellent coping-free bridge construction Done.

In addition, it is possible to easily connect adjacent girders by using the arcuate branch connection member in the continuous branch portion, so that the girder can be easily continuous and the arched branch connection member is embedded in the branch concrete to enhance the connection stiffness of the continuous branch portion. Can be structurally advantageous.

The scope of the present invention is shown by the following claims rather than the above 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 invention. do.

1a and 1b is a construction view and cross-sectional view of a conventional non-coping bridge,
Figure 1c is a construction point continuous point portion of the conventional no-coping bridge,
Figure 2a and Figure 2b is a connection configuration diagram and operation state diagram of the arched point connection member and girder of the present invention,
3a, 3b and 3c is a connection configuration of the arcuate branch connection member according to the girder cross section of the present invention,
4a, 4b and 4c is a construction sequence diagram of the bridge using the arcuate point connecting member of the present invention.

DETAILED DESCRIPTION Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art may easily implement the present invention. 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 the drawings, parts irrelevant to the description are omitted in order to clearly describe the present invention, and like reference numerals designate like parts throughout the specification.

[Architecture point connecting member 100]

2A and 2B illustrate a perspective view and an operational state diagram of the arcuate branch connection member 100 and the girder 200 according to the present invention.

The arcuate branch connection member 100 includes an arcuate connection panel 110, an end connection steel 120 and an end connection plate 130.

The arcuate connection panel 110 is a precast concrete panel that is curved upward and is prefabricated at the factory. When the load (bending moment) is applied, the arcuate connection panel 110 serves to transfer the load to both ends by the axial force (P). Done.

Therefore, since it is manufactured in the factory, it is easy to control the quality and is manufactured to have a thin thickness, so that there is an advantage in carrying and constructability.

At this time, it is preferable to form a plurality of studs 111 on the upper surface so that it can be effectively synthesized in the pour point concrete (C) to be described later.

Both end surfaces A of the arcuate connection panel 110 are formed so as to protrude the end connection steel 120 is arranged so that a plurality of them are spaced apart from each other.

The end connection steel 120 is to be formed together with the arc-shaped connecting panel 110 by using the I-shaped steel.

The end connection steel 120 is embedded in the continuous point in connecting the adjacent girder 200 to the arcuate connection panel 110, the rigidity of the connection portion of the girder 200 and the arcuate branch connection member 100 Will have the function to increase.

When the end connection steel 120 using the I-shaped steel can be used to cut the ready-made I-shaped steel is very economical and easy to manufacture and deploy.

The end connection plate 130 is integrally welded to the end surface of the end connection steel 120, and the anchor 210 formed in the girder 200 is penetrated through the connection nut 220 as described below. It is possible to connect the 200 to the arcuate point connecting member 100.

Accordingly, the end connection plate 130 uses a plurality of through holes 131 formed in the steel plate.

Such arcuate branch connection member 100 has a function to allow the girder 200 to be continuous with each other in the continuous point portion for this purpose, both ends of the arcuate branch connection member 100 on the upper surface of the girder 200 The support groove 230 is formed to be inserted and supported.

Therefore, when the arcuate point connection member 100 is installed, its end can be simply inserted into the support groove 230 and then supported to support the construction.

Since the girder 200 and the arcuate branch connection member 100 are not continuous by the support of the arcuate branch connection member 100, the anchor 210 is formed on the inner side surface B of the support groove 230. It is formed to protrude.

The anchor 210 uses a bolt and the anchor 210 is disposed to penetrate the through hole 131 of the end connection plate 130 formed at the end of the arcuate connection panel 110.

Accordingly, the anchor 210 is fastened by the connection nut 220 on the rear surface of the end connection plate 130 so that the final arcuate point connection member 100 and the girder 200 may be continuous with each other.

The end of the girder 200 is such that the cutout portion D having a shape corresponding to the stepped portion is formed so that the end portion is mounted on the stepped coping portion 300 to be described later.

As such, when the arcuate branch connection member 100 and the girder 200 are continuous with each other by the anchor and the connecting nut, the branch concrete C is poured by a mold not shown. The member 100, the girder 200, and the stepped coping part 300 are embedded in the point concrete C to be synthesized with each other.

In this regard, the branch connection member is referred to as a buried branch connection member in that the branch connection member is embedded in the branch concrete.

Accordingly, when the bridge concrete is cured and the bridge construction is completed, the bending parent moment is generated at the continuous point part due to the self weight and the shared load of the girder. The bending parent moment acts on the arcuate point connecting member 100.

Therefore, the arcuate branch connection member 100 transmits the bending parent moment to both ends by the axial force (P), and both ends are supported by the support grooves 230 of the girder 200, thereby connecting the connection stiffness of the continuous point portion. It can be seen that it can be effectively secured by the arcuate branch connection member 100.

In addition, the arcuate branch connection member 100 is embedded in the branch concrete (C) has a function to promote the connection rigidity of the continuous branch portion.

In addition, if the forming position of the support groove 230 is disposed at a position spaced apart from the continuous point in the axial direction, it is possible to be less affected by the bending parent, so that it is possible to more safely manage the connection site vulnerable to the load.

[Construction of arcuate point connecting member 100 according to girder 200]

3A, 3B, and 3C illustrate construction examples of the arcuate branch connection member 100 of the present invention according to the type of the girder 200.

First, FIG. 3A illustrates an application example of the PSC girder 200a.

That is, the PSC girder 200a is a beam member formed of an upper flange, an abdomen, and a lower flange in an I-shaped cross section, and is a reinforced concrete girder in which prestress is introduced in a longitudinal direction by internal PC steel.

It can be seen that a cutout portion D is formed at a lower portion of the PSC girder 200a so as to be mounted on the stepped coping portion 300, and the cutout portion D is cut out. The lower flange and the lower abdomen in the shape of a groove may be formed.

It can be seen that the support groove 230 described above is formed on the upper surface of the upper flange of the PSC girder 200a, and the anchor 210 protrudes from the support groove inner surface B.

Accordingly, the anchor 210 penetrates through the through hole 131 of the end connection plate 130 of the arcuate point connection member 100, and the anchor 210 ends at the back of the connection plate with the connection nut 220. It is to be fastened to the connection plate 130.

3B is an application example of the U-shaped girder 200b.

That is, the U-shaped girder 200b is a beam member formed in both sidewalls and a lower flange in a U-shaped cross section, and is a reinforced concrete girder in which prestress is introduced in a longitudinal direction by PC steels in both sidewalls.

Both ends of the U-shaped girder (200b) can be seen that the cutout portion (D) is also formed on the lower portion so that it can be mounted on the stepped coping portion (300). It may be formed in the lower flange and the lower side walls in the form of a groove.

It can be seen that the support groove 230 described above is formed on the upper surface of the upper flange of the U-shaped girder 200b, and the anchor 210 is formed to protrude from the inner surface of the support groove.

In the same manner, the anchor 210 penetrates through the through hole 131 of the end connection plate 130 of the arcuate point connection member 100, and the anchor 210 is connected to the connection nut 220 on the back of the connection plate. Is fastened to the end connection plate 130.

3C is an application example of the U-shaped steel girder 200c.

That is, the U-shaped steel girder 200c is composed of both steel beams and a lower flange formed of an upper flange and an abdomen in a U-shaped cross section.

In this case, the support groove 230 described above cannot be formed because it is made of steel, and in the case of the U-shaped steel girder 200c, the support block 240 is additionally formed on the upper flange upper surface.

That is, for example, a support block 231 having a triangular block shape is formed on the upper surface of the upper flange by welding so that the support groove 230 may be formed, and an anchor is formed on the inner side of the support groove formed in the support block 231. 210 is formed, and the support plate 130 is in contact with the support groove of the support block 231.

Therefore, both side surfaces of the support block 231 are welded to the upper side of the side wall support plate 232 for supporting the support block 231 to the upper flange, as described above, the end connection plate of the arcuate point connection member 100 ( The anchor 210 penetrates through the through hole 131 of the 130, and the anchor 210 is fastened to the end connection plate 130 by the connection nut 220 on the rear surface of the connection plate 130.

Thus, both ends of the U-shaped steel girder (200c) can also be seen that the cutout portion (D) is formed at the lower portion so that it can be installed on the stepped coping portion (300). It may be formed in the lower flange and the lower side walls in the form of a groove.

As a result, it can be seen that the arcuate branch connection member 100 of the present invention has usability that can be easily applied to various girder cross sections.

[Bridge construction method using arcuate point connecting member 100]

Since the bridge construction method is based on the continuous point portion (E), it becomes a multi-span bridge construction. The multi-span bridge is installed by first shifting the pier and the pier in the axial direction, and mounting the girder 200 on the shift and the upper portion of the bridge, but using the stepped coping part 300 installed on the pier.

After the girder 200 is mounted on the stepped coping part 300, the final slab is constructed by integrally pouring the point concrete and the slab concrete. Specifically, it looks like trimming.

First, as shown in FIG. 4A, the bridge lower structure, that is, the shift 410 and the bridge 420 are spaced apart from each other in the direction of the bridge.

At this time, the pier 420 constructs the pillar portion 421 on the ground and installs the stepped coping portion 300 in the lateral direction instead of the conventional coping portion.

Accordingly, the stepped coping part 300 may use a precast reinforced concrete member including a vertical wall 310 and a stepped part 320 extending to both sides of the lower side of the vertical wall.

As a result, the pillar portion 421 is first installed in the field by a cast-in-place concrete method, and then the stepped coping part 300 brought into the site is installed on the pillar portion 421 upper surface.

Next, the girder 200 described above is mounted between the piers and the piers and between the piers and the piers.

That is, as shown in FIG. 4B, since the cutting portions D are formed at both lower ends of the girder 200, the girders 200 may be installed in the axial direction (the longitudinal direction) in the alternating and pier directions by simply mounting them. .

Next, the girder 200 adjacent to both sides of the stepped coping part 300 is connected to each other by using the arcuate branch connection member 100 as described above to be continuous.

This connection is made by connecting the anchor 210 of the support groove 230 formed in the girder 200 through the end connection plate 130 of the arcuate branch connection member 100 and fastening it to the connection nut 220.

Next, as shown in Fig. 4c, by placing the base concrete (C) using the formwork not shown in the continuous point portion (E), both girders 200, stepped coping portion 300 and arcuate in the continuous point portion The point connecting member 100 is to be synthesized with each other and the point concrete is to be poured together with the slab concrete to be completed with the slab of the bridge to complete the bridge.

The final bridge according to the present invention can be seen that when the traffic load is applied to the girder supporting the slab of the bridge will generate a bending moment and the bending point in the continuous point portion.

Accordingly, the bending parent moment is transmitted to the arcuate point connecting member 100 positioned in the continuous point portion, and the arcuate point connecting member 100 transmits the bending parent moment to the girders by axial force.

At this time, the portion where both ends of the arcuate point connecting member 100 is connected to the girder is formed in a position spaced laterally, rather than located in the continuous point portion to avoid the position where the bending parent moment occurs to the load It is desirable to be able to protect vulnerable connections.

100: arcuate branch connection member
110: arched connection panel
120: end connecting steel 130: end connecting plate
200: girder 200a: PSC girder
200b: U type girder 200C: U type girder
210: anchor 220: connecting nut
230: support groove 240: support block
300: stepped coping part
310: vertical wall
320: stepped portion
410: shift
420: piers
421: pillar
A: End face of the arcuate connecting panel
B: inner side of support groove
C: Branch Concrete
D: Cutout of girder

Claims (5)

Construction of the pillar portion 411 of the piers 410 on the ground and the stepped coping portion 300 composed of a vertical wall 310 and a stepped portion 320 extending to both sides below the vertical wall on the upper surface of the pillar portion. Installing to extend in a direction;
The step of installing the girder so that the girder adjacent to each other in the continuous point portion is installed so that the girder 200 is formed on the upper surface of the step portion 320, the support groove 230 formed by the anchor 210 is exposed on the upper surface of the upper flange; And
An end connection steel 120 protrudes from both end surfaces, and an arcuate point connection member 100 having an end connection plate 130 formed on an end surface of the end connection steel is connected to the upper surfaces of the girders adjacent to each other to form a girder 200. Continuum)
The connection between the adjacent girders 200 and the arcuate branch connection member 100 is such that the anchor 210 formed on the inner surface B of the support groove 230 formed in the girder passes through the end connecting plate 130. And bridge construction method using the arcuate point connection member, characterized in that the anchor 210 is fastened to the connection nut 220 on the back of the end connection plate 130. The method of claim 1,
Arching point connection member, characterized in that the adjacent point girder 200, the arched point connection member 100 and the stepped coping portion 300 is synthesized with each other by pouring the point concrete (C) to the continuous point portion Bridge construction method using The method of claim 1,
The connecting portion of the girder 200 and the arcuate point connecting member 100 is characterized in that the support groove is formed on the upper surface of the upper flange of the girder so as to be located at a position outside the continuous point E of the multi-span bridge. Bridge construction method using an arcuate point connecting member. The method of claim 1,
The girder 200 includes an I-shaped PSC girder or a U-shaped girder and has a cutout portion D corresponding to a stepped portion of a stepped coping portion at a lower portion thereof so as to be mounted on the stepped coping portion 300. Bridge construction method using an arcuate point connection member, characterized in that to be formed. The method of claim 1,
The girder 200 is a U-shaped steel girder to form a support block 240 on the upper surface of the upper flange, the support block is a triangular block-shaped support block 231 is formed by welding on the upper surface of the upper flange, the support Forming an anchor 210 in the block 231,
On both sides of the support block 231, the side wall support plate 232 supporting the support block 231 is welded to the upper surface of the upper flange to form a support groove 230 having an anchor installed on the upper surface of the U-shaped steel girder. Bridge construction method using the arched point connection member to be.

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