KR20140139703A - Steel Connector Between Precast Segments and Connection Method - Google Patents

Abstract

The present invention relates to a coupling device for easily coupling precast segments. In particular, when an upper PSC girder of a bridge is manufactured by segments, the segments are easily coupled to each other. A steel coupler formed with bolt holes is installed on an end of the segment so as to easily couple the segments, and the segments are coupled to each other only by fastening bolts, like connection of a general steel bridge. The segment attached with the coupler can be manufactured at a factory or at a spot. If the coupler is employed, since a coupling portion between the segments of a continuous bridge is not placed at a pier, but placed at an inflection point, the constructability of the continuous bridge is improved. Since the segments are coupled to each other by the bolts, the reliability of the coupling portion is improved. Also, since concrete placing is not required for the coupling portion between the segments, the period of construction is shortened. In addition, since the coupler is made of steel, and the segments are made of concrete, it is economical.

Description

TECHNICAL FIELD [0001] The present invention relates to a steel member for joining precast segments,

The present invention relates to a connecting device for facilitating the connection between a precast segment and a segment, and more particularly, it relates to a technique which can greatly facilitate joining of a segment and a segment when the upper PSC girder of a bridge is formed into segmented segments.

Although the present invention can be applied to all pre-cast intercompany connections, the following description is limited to bridges using split PSC girders with high applicability.

Bridges are largely divided into steel and concrete depending on the material of the upper part, and various types of superstructures are made by using them.

Here, a precast concrete girder, that is, a post tension prestressed concrete girder (hereinafter referred to as PSC girder), which can be manufactured at a factory or on site, will be described.

In the present invention, in order to unify the terms, the girder and the beam will be referred to as the common girder.

In response to the changing times, there is a tendency to use many precast girders for air shortening these days.

The precast girders are classified into concrete girders with steel wires inserted, that is, PSC girder series and preplaced girder series made of steel beams in concrete.

The PSC girder system secures the site of the site in the field, inserts and tensions the concrete after pouring and curing the concrete using the form, lifts the girder with the crane and mounts it on the upper part, A patent for tensing a steel wire through a second order, and a patent for a connection method for a continuous point portion.

In addition, if it is difficult to secure the site for the construction site at the construction site, the girder is produced in the form of a segment at the factory, and there is a method of connecting the segments at the site to complete a single girder and mounting the girder.

In the method of connecting the segments to each other, epoxy is applied to the joint surface of the segment provided with the shear-key, and the steel wire is tensioned to complete one girder. At this time, the concrete in the joints is resistant to the earth pressure stress by using high strength concrete.

The preplaced girder series

The construction site is secured at the site, and the concrete is inserted and cured in the flange of the steel beam with the prefabrication in the steel beam, and then the girder is lifted with the crane, There is also a method of completing the upper portion by pouring a patent to further tension the steel wire.

Also, if the field production is not feasible, the preflex girder can also be manufactured as a segment in the factory. When the concrete is placed on the flange of the steel beam, the flange is exposed on the end side, Bolt connection is possible. After pouring concrete into the joint, tension the steel wire to complete one girder.

The above-mentioned precast girders are technologies that are currently commercialized as technologies necessary for lowering the mold height, realizing the long span, shortening the air, and securing the economical efficiency.

For PSC girder:

The PSC girder is mostly constructed as a simple beam. However, if two simple beams are continuously connected at consecutive points over two spans, additional reinforcement is required. In addition, it is economical to design the girder with a different section height because it generates a moment greater than that at the center of the span. However, PSC girders in actual construction are manufactured with simple beams and then sequenced. There are disadvantages.

Since the PSC girder which is made by connecting the segment and the segment needs to use high strength concrete, it can be manufactured only at the factory due to the quality control. Also, the precise construction management is required at the joint surface even when the segment is connected to the site after it is transported to the site. It is necessary to precisely control the tension so that tensile cracks do not occur at the upper part of the joint surface of the girder in the case of the tensional strain.

For preflex girders:

In case of preflex girder, there is a disadvantage that extra equipment is needed to introduce prefabrication in addition to formwork in the field production, and steel material is used in large quantity by using steel beam.

In addition, the segmented preflex girders made for continuous sanding are bolted to the seg- ments in the field, but the concrete is laid again on the joints, which means that concrete curing time is required before placing on the upper part .

In order to facilitate the connection of the segment and the segment, the present invention provides a connection member made of a steel material at the end portion of a concrete segment to enable a prefabricated connection of the segment and the segment by bolt fastening to be.

First, in the present invention, the terms of segments and girders are classified as follows.

A segment is a unit made of a single concrete pouring, and a girder is a connection assembly of two or more segments.

The cross-sectional shape of the connecting material is divided into a square, an I-type, and a double I-type, and the shape of the connecting material has a slight difference depending on the assembling order of the segments.

That is, in the order of assembling the segments, after assembling the segments after the segments are manufactured, the steel wire is tensioned and fixed at one time to form the girders, and after the assembly, the steel wire is tensioned and fixed to each segment after the segments are manufactured, There is a difference in the shape of the connecting material depending on whether it is a connecting material applied to the tension method after the assembly or a connecting material applied to the pre-assembling tension method.

The difference is that the connecting material applied to the tensioning method after assembly has a sheath tube exposed or a hole for a sheath hole, and a connecting material applied to the pre-assembly tension method is provided with a steel wire fixing port for fixing the steel wire.

In the production of the segment, reinforcement and sheath pipe embedding is the same as the existing PSC girder.

The following describes the connection method between the connector and the connector.

It is the connection method to the connecting material which is used first in the tension method after assembly.

When installing a mold for producing a segment, the connecting material is installed at one end or both ends of the segment, and concrete is laid and cured to complete one segment. The shape of the connecting member is formed into a rectangular shape or an I-shaped cross-sectional shape identical to that of the segment, so as to surround the segment. When making a segment, insert a bolt in the bolt hole of the connecting material before the concrete is inserted so that the head of the bolt is located inside the connecting material. Then, the bolt head is tag welded with the connecting material so that the bolt does not move. Of course, it is natural to weld the shear joints inside the joints in order to integrate the joints with the concrete.

The finished segment can be assembled by simply connecting another segment. In this connection method, the segments and the segments are put in contact with each other, and the connecting plate is fastened to the screw of the bolt protruded in the connecting member and the nut is tightened.

Although the segment with the connecting material after the assembly process can be manufactured at a factory, it is advantageous in that the quality of the connecting portion can be secured even if it is manufactured in the field since the connecting method of the connecting portion between the segments is simple.

The following is the connection method for the connecting material used in the tension method before assembling.

As described above, the steel connecting material is used. However, since the shape of the connecting material is partially modified to add a fixing device for the steel wire to the connecting material, since each of the segments before the connection has a prestressing effect, There is a feature that there is no need to separate wire tension work behind.

Particularly, when the above-mentioned connecting material for the pre-assembly tension method is used at the inflection point of the bending moment in the continuous beam, the continuity and the workability of the continuous beam are greatly improved.

Since the connection between the segments using the connecting material is connected to the connecting plate only by the connecting plate and the bolt like a general steel bridge, the structure of the connecting portion is clearly examined, the connecting portion is easy to assemble, the quality control is excellent, .

The present invention is a technique for designing a connection member made of a steel material so that a segment and a segment can be easily connected to a bolt in making a prefabricated PSC girder,

Segments with this connector can be made at the plant or site,

With this connector, it is possible to place the connection portion at the bending moment inflection point instead of the bridge point when connecting the segments in the continuous bridge,

Segment-to-segment connections are bolt-based,

The air can be shortened because most of the concrete is not poured into the connection part when assembling between the segments.

Also, the joint is only steel, and the segment is concrete, so it is economical.

1 is a perspective view of a segment-perspective view having a rectangular connecting member for a post-
FIG. 2 is a perspective view of a rectangular connecting material-
Figure 3 is a cross-sectional view of the < RTI ID = 0.0 >
Fig. 4 is a cross-sectional view showing the shape of the square connecting member-
Fig. 5 is a view showing a state in which the bolt fastening of the rectangular connecting member-
Figure 6 is a cross-sectional view of an open rectangular connector-
Fig. 7 is a cross-sectional view of the I-
Fig. 8 is a cross-sectional view of the I-
Fig. 9 is a cross-sectional view of an embedded I-
Fig. 10 is a cross-sectional view of an I-
Fig. 11 is a cross-sectional view of the I-
Fig. 12 is a simplified block diagram of a segment having a post-
FIG. 13 is a cross-
Figure 14 is a cross-
15 is a cross-sectional view of a side-by-side segment-perspective view having a double I-
Figure 16 is a cross-sectional view of a point segment having a double I-type connector for pre-assembly tension method and a center segment-
17 is a double I-type connector for a tension method before assembling - detail drawing
18 shows a double I-type connector for a tension method before assembling -
Figure 19 shows a double I-type connector for tensioning before assembly -
FIG. 20 is a view showing a two-span continuous splicing sequence of a segment having a connecting material for pre-
Fig. 21 is a longitudinal sectional view of a double I-type cross-sectional connector for a pre-assembly tension method
Fig. 22 is an example of various span applications of a segment having a connecting material for pre-assembly tension method.
23 is an example of a curved bridge application of a segment having a connecting material for pre-assembly tension method -
24 shows a double I-type connector for pre-assembly tension method capable of continuous tension -
25 shows a method of assembling a segment having a double I-type connecting material for pre-assembly tension method capable of continuous tension
26 shows a connection segment connecting a segment having a connecting material after the assembly process and a segment having a connecting material before the assembly process;
Fig. 27 shows a connection method of a girder and a segment using a connecting segment in the case of continuous two-span connection;
28 is a perspective view showing a box-
Fig. 29 is a perspective view of a box-
Fig. 30 is a schematic view showing an example of application of a segment having a connecting material for pre-
31 is an example of a ramen bridge application using a segment having a connecting material for pre-assembly tension method -
32 is a perspective view of an embedded double I-type connector for tensioning before assembling -
Fig. 33 is a sectional view of the connecting double I-
Fig. 34 is a perspective view of the embedded I-type connector-
35 is a cross-sectional view of the connecting I-
Fig. 36 is a schematic view showing an example of application of a segment having a buried I-type connecting material for a pre-

Hereinafter, a connector according to the present invention will be described in detail with reference to the accompanying drawings.

This connector can be applied to all cross-sectional segments, for example hollow box-shaped cross-section and I-shaped cross-section.

In all segments, reinforcing bars are placed before the concrete is poured. In order to integrate the concrete with the concrete, a shear connection member and a steel bar or a reinforcing bar resistant to tension and compression are welded inside the connection member. And therefore it is not shown in this figure.

Further, in the present invention, the primary wire and the secondary wire are separately used for easy understanding. This is to show that the wire tension can be integrated or divided according to the application load or the use, for example, maintenance, etc. , It should not be construed to limit only the first and second, ie, two, circuits.

Hereinafter, a segment having a hollow box-shaped cross section will be described in detail as a representative cross section, and the other will be briefly described.

First, a typical connecting material applicable to the post-assembly tension method will be described.

FIGS. 1 to 5 are views of a rectangular connector 110 for a tension method after assembly.

1 shows a segment with the rectangular coupling 110, wherein (a) is an end segment 101 located on the end side of the present girder, (b) shows a center segment 100 located at the center of the present girder, to be.

The body of the end segment 101 is reinforced concrete 103. Fixing ports 104 and 105 for fixing the steel wire are formed at one end and a rectangular connecting member 110 made of steel is provided at the other end .

The body of the center segment 100 is reinforced concrete 102, and both ends of the connecting member 110 made of steel are installed.

2 shows a front side and a rear side of one connecting member 110. As shown in FIG.

The connecting member 110 is composed of an upper plate 111 and a lower plate 113, a baffle plate 112 and a blocking plate 114. The upper plate and the lower plate and the baffle plate are provided with holes to insert the bolts 115 from the inside, (115) Tag the head so that it does not move. The shield plate 114 is provided with a sheath hole 121 for allowing the steel wire to pass therethrough, and a sheath pipe 120 is welded to the back surface of the barrier plate.

When the mold for forming the segment is installed, the connecting member 110 is also installed. At this time, the blocking plate 114 serves also as a mold for ending the segment, and the inside of the connecting member is filled with concrete when the concrete is poured .

3 shows the shape of the end segments 101 and the center segment 100 before they are connected.

4 shows the shape before the nut 119 is fastened to the bolt 115 in a state where the segments are aligned with each other.

Insert the connecting plates 116 and 117 with the holes 118 in the upper and lower and left and right side bolts 115 in the state of returning the segments and tighten the nuts 119 by turning them. At this time, since bolt fastening is one-side fastening, it is preferable to use F13T among high tension bolts.

FIG. 5 is a view showing that the bolt fastening is completed at the connecting portion of the rectangular coupling member 110.

6 is a perspective view of an open rectangular coupling member 130 in which the blocking plate 114 is removed from the rectangular coupling member 110. FIG.

Actually, the concrete was filled in the joint material. However, the concrete was transparently treated to show the shape of the bolt inside the joint material.

The sheath pipe 120 is secured to a position by weaving with a reinforcing bar or the like, and is preloaded before the concrete is poured. The arrangement of the sheath tube 120 is the same as that of the rectangular connector 110 of FIG. Further, since there is no blocking plate 114, a mold for end finishing must be separately provided when a segment is manufactured. The connection method of the open rectangular connection member 130 is the same as that of the rectangular connection member 110.

7 to 8 are views of the I-type connector 150 for the post-assembly tension method.

7 is a perspective view of the I-type connector 150. FIG.

The connecting member is an I-shaped member having the same shape as the end surface of the segment and has an upper plate 151, a lower plate 153, two baffle plates 152 on the abdomen, four side plates 155 on the upper and lower flange portions, The swash plate 156 and the blocking plate 154 are different from each other only in the shape of the plate, and the role of the plate and the connection method of the coupling members are the same as those of the rectangular coupling member 110.

8 is a front and rear view of the I-type connector 150 for a tension method after assembly.

8 (a) shows the end segment 141 and the center segment 140 as an arrangement of each segment before connection.

The configuration including the end segments 141 and the sheath tube and the fastening port of the center segment 140 is the same as the end segment 101 and the center segment 100 of FIGS.

8 (b) and 8 (c) show the shape before the connection at the connecting portion of the segment having the I-type connecting material 150, and FIGS. 8 (d) and 8 (e) show the shape after connection.

The connecting plate (157) is attached to the flange and the bumper plate, respectively, and is fixed by a nut.

9 to 11 are views of the embedded I-type connector 170 for the post-assembly tension method.

Fig. 9 is a perspective view of the connector 170. Fig.

The connecting member 170 is not a shape wrapped around the segment end portion but is a segment in which the concrete is inserted by partially inserting the connecting member 170 into the segment end concrete. (See Figs. 11 (b) and 11 (c)) after the segments are connected by bolts, the concrete is poured into the joints in the same manner as the segment concrete cross- As a result, the connecting portion including the bolt is not exposed to the outside, so that the appearance is improved.

The connecting member 170 is composed of an upper plate 171, a lower plate 173 and a bumper plate 172, and bolt holes 118 are formed in each plate. The sheath tube 120 is exposed for torsional tension after the segment connection. The sheath tube is connected to the sheath tube of the butt-connecting segment using a simple connector 175 (see FIG. 11 (c) .

10 shows a state before connection of the embedded I-shaped connector 170 for the post-assembly method, wherein (a) shows the end segment segment 161 and the center segment 160 as an arrangement of each segment before connection, and b) and (c) show the shape of the connecting portion of the segment having the embedded I-type connector 170 before connection.

11A and 11B show a state after the connection of the embedded I-shaped connector 170 for the tension method after the assembly, in which (a) is a layout of each segment after the connection, and (b) and (c) After connecting the connecting segment of the segment, the connecting plate is bolted, the sheath pipe is connected, and the concrete (176) is laid on the connecting portion.

12 is a cross-sectional view showing a segment having a rectangular connecting member 110, an open rectangular connecting member 130, an I-type connecting member 150, and a buried I-type connecting member 170 applied to the post- And FIG. 3 is a view showing a construction sequence of a simple beam when the girders are connected to each other. FIG. 3 is a schematic representation of the segments 100 and 101 having the rectangular coupling member 110.

12 (a), the segments 100 and 101 having the connecting member 110 are arranged, and (b) the connecting portions are fastened with bolts and nuts to assemble each segment into a single girder. (c) Insert a primary strand at one end of the girder and strain the strand to create a prefabricated PSC girder. (d) Lift the girder through a crane and mount it on the top of the bridge. (e) The bottom plate concrete is poured, the secondary steel wire is inserted, and the tension is fixed to complete the upper part.

When the segment having the embedded I-type connector 170 is to be connected, the bolts are fastened in FIG. 12 (b), and the concrete is laid on the connector so that the connector is not exposed.

Figs. 13 to 14 show cross-sectional shapes of segments applicable to both the post-assembly tension method and pre-assembly tension method,

Fig. 13 (a) is a schematic diagram of a longitudinal sectional view of a segment, and Fig. 13 (b) is a hollow box-shaped cross section.

14 (a) is a schematic diagram of a segment longitudinal cross-sectional view, and Fig. 14 (b) shows a general I-shaped cross-sectional shape.

The following describes typical connecting materials applicable to the pre-assembly tension method.

15 to 23 are views of the double I-type connector 210 for the pre-assembly tension method.

15 to 16 are perspective views of a segment having a double I-type connector for a pre-assembly tension method.

15 shows a perspective view of the sagittal segment 201 and a shape of a steel wire disposed in the sagittal segment.

The body of the sideward spacer segment is a reinforced concrete (203), and fixation ports (104, 105) capable of fixing a steel wire are formed at one end and a double I-type connection material (210) made of steel at the other end.

16 shows the point segment 200 and the center segment 206 at the same time. The appearance of the point segment and the center segment is the same, but there is a difference in the shape of the steel wire disposed inside the segment concrete 202.

The body of the point segment and the center segment is reinforced concrete (202), and both ends are provided with a double I-type connecting material (210) made of steel.

15 and 16, in the method of manufacturing a segment to which the link member 210 is applied,

The reinforcing steel rod and the sheath pipe are installed and the connecting member 210 is installed at one end or both ends of the concrete concrete pouring and curing primary steel wire is tensioned and fixed to form one segment, that is, the sidewall segment 201 or the point segment 200, Or the center segment 206 is completed.

17 is a perspective view of the connecting member 210 at the connecting portion of the sidewise segment 201 having the connecting member 210 and the connecting segment 210. [

The connecting member 210 is composed of an upper plate 211 and a lower plate 213 and two baffle plates 212 and a blocking plate 214 and in particular a plurality of steel wire fixing ports 204 and 208. The upper plate and the lower plate, The bolt 115 is inserted from the inside, and the head of the bolt 115 is welded by tag so as not to move. At this time, only the bolt holes 218 are provided on the upper and lower plates corresponding to the outer sides of the two baffle plates. In the middle of the upper plate 211, a concrete pouring hole 215 for pouring concrete is placed after connecting the bolts between the segments. The blocking plate 214 is provided with fixing ports 204 and 208 for fixing the steel wire, and the blocking plate 214 serves also as a mold for closing the end of the segment when the segment is manufactured.

Figs. 18 and 19 show the connection before and after connection of the double I-type connector 210 for the pre-assembly tension method.

Figure 18 is a view of the connection between the sideward segment 201 and the point segment 200 before connection

(a) is a sectional view of the coupling member. Since the inner space surrounded by the bumper plate 212 and the upper plate 211 is closed when the segments and the segments are connected, the bolts 115 are installed in advance and the friction bolts are connected on one side. (b) is a longitudinal sectional view of the inter-segment connection portion. The first fixing member 204 for fixing the first steel wire before assembling the segment and the second fixing member 208 for fixing the second steel wire after the segment is assembled are assembled together with the sheath tube 120 together with the sheath tube 120, Respectively.

19 is a cross-sectional view of the connection between the sidewall segment 201 and the point segment 200

(a) is a sectional view of the coupling member. Align the connecting plates 216, 219, 217 and tighten the nuts 119 to complete the inter-segment connection. After the connection, it is preferable to fill the inside of the bumper plate with concrete by pouring the concrete 209 through a hole (215, Fig. 17) for pouring the concrete into the top plate. (b) is a longitudinal sectional view of the connection portion.

20 is a two-span continuous beam-tightness flow chart of a segment having a double I-type connecting material 210 for the pre-assembly tension method. (a) Primary strand 221 Lists each strained segment. (b) The sideward segment 201 and the point segment 200 are connected by bolts. In this case, as a segment arrangement in (a) and a segment-to-segment bolting method in (b), there is a method of installing a vent, mounting each segment with a crane and then bolt-tightening the bolts, There is a method, which can be chosen according to the conditions of the field. (c) The bottom plate concrete is poured, and the secondary steel wire 222 is tightened to complete the upper part of the bridge.

FIG. 21 is a cross-sectional side view of the double I-type connecting material 210. The point girder 223 installed at the continuous point portion which receives a large amount of momentum increases the section height, The cross-sectional girder 224 may be designed to have a reasonable girder design by reducing the cross-sectional height. In order to connect the segments having different cross-sectional heights, the cross-sectional girder 224 has a double I- Sectional connectors 225 and 226 were used.

FIG. 22 shows various span applications of segments with the pre-assembly tensioning joints 210, 225, and 226. (a) is a two-span application of a segment having the double I-type connector 210, and consists of a sidewall segment 201 and a point segment 200. (b) is a two-span application of a segment having the double I-shaped cross-sectional connectors 225 and 226, and consists of a sidewall segment 224 and a point segment 223. (c) is a three-span application of the segment with the double I-type connector 210, consisting of a sideways segment 201, a point segment 200 and a center segment 206.

21 and 22 (b), the concept of introducing a slanting cross-section into the connecting member is applicable to all the connecting members used in the present invention.

23 is a perspective view of the double I-type connector 210. The double I-type connector 210 is formed in a straight line shape in which the upper and lower plates of the connector 210 are bent when viewed from a plane, Directional coupling member 229 having a planar cross-sectional shape and segments 227 and 228 having such a cross-directional coupling member 229. As shown in FIG. This only changes the planar shape of the joint, but it is no different from other pre-assembly tension joints. As shown in Fig. 23 (a), the segments are arranged, and the segments are connected to each other by bolts as shown in Fig. 23 (b). (c) shows a plan view of a twisted span bridge bridge when the four-way coupling member 229 is applied. In Figure (c), each represents an alternation, and the dotted line in the middle oval represents the bridge. In the case of applying the four-way connecting member 229 as described above, since the length of the end plate of the bottom plate can be reduced as shown in FIG. 23 (c), unlike other PSC girder bridges,

The concept of introducing a planar warp directional linking member 229 into a segment as shown in FIG. 23 can be applied to all the linking members for pre-assembly tension method used in the present invention.

Hereinafter, the connection member 210 for the pre-assembly tension method described above will be briefly described as modified shapes.

24 to 25 show a double I-type connector 240 for pre-assembly tension method capable of continuous tension. In other words, the difference from the double I-type connector 210 is that the secondary wire fixing port 208 for tensioning the secondary wire is not removed after the segment is assembled, the sheath tube 120 for secondary wire is exposed at the same position, By connecting the sheath pipe 120, it is advantageous that the entire girder to which the bolt connection is completed can be continuous with one steel wire.

25 shows the connection of the segment 242 and the segment 241 having the connecting material 240 in the simple beam only receiving the positive moment. the end segment 242 and the center segment 241 after the primary wire fixing 204 are connected to each other by bolts as shown in (d) and then the sheath tube 120 is fastened And the concrete 209 is poured through the concrete pouring hole 215 as shown in FIG. 5 (b), and the concrete 249 is poured on the finished surface 248 with the pouring die.

Then, the bottom plate concrete is poured and the secondary steel wire is continuously inserted into the entire girder through the sheath pipe 120, and then the secondary steel wire is tightened at the end of the girder to complete the upper part of the bridge. At this time, a thin wire is inserted into the sheath tube 120 for the secondary wire for each segment before the segment connection. When the wires are connected to each other at the connection portion when the segments are connected to each other, when the secondary wire is inserted, Since it is provided, the insertion of the secondary wire becomes easy.

26-27 illustrate a perspective view of a connection segment and a connection method for a connection segment 250 that enables connection of a segment having a connecting material after the assembly process and a segment having a connecting material for a pre-assembly process.

26 is a perspective view of the connecting segment 250. One of the segments is provided with a typical rectangular connecting member 110 for a post-assembly tension method and the other of the segments is provided with a double I-type connecting member 210 ) Is installed.

Fig. 27 is a schematic diagram of a connection method of segments in the case of continuous span of two spans. Fig. (a) shows a left span girder 251, a point segment 200, and a right span girder 252. (b) shows the segments and the connecting members constituting the left span girder. The connecting segment 250 having the end segment 101 and the center segment 100 having the rectangular connecting member 110 and the other end of the rectangular connecting member 110 and the double I-type connecting member 210 is connected at the connecting portion The steel wire is inserted into the sheath pipe 120 and the steel wire is tensed and fixed at the end of the assembled girder 251 to complete the left span girder 251 (see Fig. 27 (c)). (d) The right span girder 252 is assembled like the left span girder. (e) shows the point segment 200 with the double I-type connector 210 for pre-assembly tension method where the steel wire is already tensioned at both ends of the segment. Then, the left span girder 251, the branch segment 200 and the right span girder 252 are bolted to complete the two span continuous beams as shown in (f).

The connection segments 250 of FIG. 26 can be variously combined depending on what type of connection material is installed at both ends of the segment.

Figs. 28 to 31 show a perspective view of the box-shaped coupling member 260 for the pre-assembly tension method and before and after connection of the connection portions.

The box-shaped connecting member 260 is formed in a hollow form so that the fixing port can be installed. The fixing port is installed on the blocking plate 263 inside the connecting member. When the connecting member is connected, the inside is closed, Since it is difficult, install a connecting plate only on the outer surface of the joint, and fasten it with friction on one side.

Fig. 30 shows that the central segment 261 (see Fig. 29) with the box-shaped linking member 260 can be applied not only to simple bridge and continuous bridge but also to ramen bridge. In the case of the ramen bridge, first the foundation is laid, and the concrete and the part of the upper part of the wall are poured to form a cantilever type mineboil 270. At this time, in order to connect with the center segment 261, the coupling member 260 is installed at the end of the minambuk 270 as shown in (a), and the concrete is cured by integrally casting the concrete. As shown in (b), the connection between the min-nan bomb 270 and the center segment 261 is completed by connecting the coupling member 260 and the coupling member 260 with bolts.

FIG. 31 is a perspective view of a ramen bridge application using the center segment 261 having the pre-assembly tension joint method 260, and all the segments having a pre-assembly tension joint method can be applied to such a ramen bridge.

32 to 33 illustrate an embedded double I-type connecting material 280 in which a part of the double I-type connecting material for the pre-assembly method is embedded in the concrete of the segment. After the bolts are connected between the segments and the segments, So that the connecting material is not exposed to the outside.

34 to 35 illustrate an embedded I-type connector 290 in which a part of the I-shaped connector is embedded in a concrete of a segment. After the connection of the bolts between the segments as shown in FIGS. 35B and 35D, 292) so as to prevent the connector from being exposed.

Figure 36 shows that the central segment 291 with the embedded I-type connector 290 is applicable to simple bridge and continuous bridge as well as to ramen bridge. The application method is the same as the connection method of the center segment 261 having the box-shaped coupling member 260 of FIG. 30. The difference is that the mold is connected to the connection portion after the connection of the bolts between the segments as shown in FIG. 36 (b) By placing the concrete 292, the connecting material is not exposed to the outside.

The drawings of the above embodiments are merely illustrative of the basic form of the connector necessary for explaining the present invention.

The present invention relates to a connecting member and a connecting method for connecting a segment made of a concrete and a segment, in which a connecting member made of a steel material is used for connecting a segment and a segment, and a bolt is used for connecting the connecting member and the connecting member It corresponds to the feature of the present invention. However, even if the connection between the connection members is replaced with welding instead of a bolt, it is also within the scope of the present invention, since any person skilled in the art can easily access it.

Although the above embodiment has been described by taking a PSC girder suitable for using the connecting material of the present invention as an example, it is considered that a simple and reliable connection can be made when using the connecting material between various precast products.

Therefore, the scope of the present invention should not be construed as being limited to the above embodiments, and the technical spirit of the present invention is included in the scope of the present invention.

100, 101 - Segment for tension method after assembly
110 - Rectangular connector for tensioning after assembly
111 - Top plate
112 -
113 - bottom plate
114 - Blockade
115 - Volts
116, 117 - connecting plate
118 - Bolt hole
120 - Sheath tube
121 - Sheath hole
200, 201, 206 - Segment for tension method before assembly
204, 208 - Steel wire fixture
210 - Double I type connector for strain relief before assembly

Claims (8)

A connecting material provided at one end or both ends of a segment for connecting a precast segment for segmented PSC girders and a precast segment,
The connecting member
An upper plate and a lower plate made of steel, at least one baffle plate, and a blocking plate formed at a right angle with the segment;
For bolted connection with adjacent segments to be connected, bolt holes are respectively formed in the upper and lower plates and in the bumper plates;
When the mold is formed for the segment, the mold is installed at the end of the segment together with the mold; A pre-cast segment-to-segment steel joint member
The method according to claim 1,
In order to integrate the connector and the segment,
A plurality of tension bars for tension and compression resistance are installed on the inner side of the barrier plate contacting the concrete of the segment by welding or the like perpendicular to the barrier plate;
A shear connection member such as a stud is installed on the inner side and the bumper side of the upper plate and the lower plate of the connecting member contacting the concrete of the segment by welding; A pre-cast segment-to-segment steel joint member
The method according to claim 1,
The cross-
Having a double I-shaped cross section in the form of a quadrangle or an arrangement of two I-type or I-type;
The side surface of the link member
The upper and lower surfaces are horizontal, or the upper surface is horizontal and the lower surface has an inclined cross-sectional shape;
The planar shape of the linking member,
Parallel straight lines, but parallel straight lines in the curved direction when applied to curved bridges; A pre-cast segment-to-segment steel joint member The method according to claim 1,
Depending on the shape in which the connecting member is provided at the end of the segment,
A shape in which the connecting member surrounds an end of the segment; or,
A shape in which a part of the connecting member is embedded inward at the end of the segment; or,
A shape in which only a part of the upper plate and a part of the lower plate of the link member surround the upper and lower surfaces of the segment end; A pre-cast segment-to-segment steel joint member The method according to claim 1,
In other words, it can be classified into a tension method after assembly and a post tension tension method in which a steel wire is directly tensioned and fixed to the segment by post tension after concrete curing in manufacturing the segment.
The connecting member, which is required for applying the post-assembly tension method,
To ensure the continuity of the steel wire connection with the adjacent segment to be connected, a hole for connecting the sheath pipe to the front surface of the joint member or exposing the sheath pipe itself; And
The coupling member, which is required for applying the pre-assembly tension method,
Having a steel wire fixture for fixing the steel wire and fixing the front surface of the joint member so that the segment can have a self-prestressing effect; A pre-cast segment-to-segment steel joint member The method of claim 1, 2, 3, 4, or 5,
At the time of fabricating the connector,
A bolt hole is formed in the connecting member and a bolt is inserted therein if necessary.
A bolt hole positioned in the cross-section of the connecting member to be filled with concrete afterward; and,
A bolt hole at a position where the inside of the end surface of the connecting member is closed by the upper and lower plates and the bumper plate of the connecting member when the segment is connected to the segment; Inserting a bolt outwardly from the inner side of the cross-section of the connecting member, and preventing the bolt head from being moved by tag welding to the connecting member; A pre-cast segment-to-segment steel joint member The method according to any one of claims 1, 2, 3, 4, 5, and 6,
In the case of the connecting material necessary for applying the post-assembly tension method,
1. A method for connecting a segment and an end of a segment with the linking member,
Installing the connecting material at an end of the segment, and pouring and curing the concrete;
Installing a connecting plate on the upper plate, the lower plate, and the bumper plate of the connecting member to connect the segments to be connected to the segments provided with the connecting member, and inserting and tightening bolts and nuts; Respectively,
When the connecting member having a shape in which a part of the connecting member described in claim 3 is connected is cemented by placing a concrete in the connecting part so that the connecting part is not exposed to the outside, And connecting the pre-cast segments to each other. The method according to any one of claims 1, 2, 3, 4, 5, and 6,
In the case of the connecting material having the steel wire fixing holes necessary for applying the pre-assembly tension method,
1. A method for connecting a segment and an end of a segment with the linking member,
Installing the connecting material at an end of the segment, and pouring and curing the concrete;
Inserting a steel wire into the sheath tube of the segment provided with the connecting member to tense and fix the steel wire;
Attaching a connecting plate to the upper plate, the lower plate, and the bumper plate of the connecting member to connect the segment to be connected with the segment, and inserting and tightening bolts and nuts; Respectively,
When the connecting member having a shape in which a part of the connecting member described in claim 3 is connected is cemented by placing a concrete in the connecting part so that the connecting part is not exposed to the outside, And connecting the pre-cast segments to each other.

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