KR20100102908A - Apparatus having a girder connection anchor plate and construction method for continuity of precast prestressed concrete girder bridges using the same apparatus - Google Patents

Abstract

PURPOSE: A device for connecting an anchor plate and a sequential construction method for a PSC girder bridge using the same are provided to remarkably reduce construction time and to reduce construction and maintenance costs. CONSTITUTION: A device(100) for connecting an anchor plate comprises anchor plates and connectors(220). Each anchor plate is integrally formed in the end of a girder(110) and has a vertical part, an upper connection part, and a lower connection part. Each connector comprises a fixing bolt(B) and a nut(N). The connectors are inserted into connection holes(132) and connect the anchor plates.

Description

Fixture plate connecting device and method of continuous construction of PSC girder bridge using the same

The present invention relates to a method for constructing a multi-span continuous bridge using a precast PSC (Prestressed Concrete) girder manufactured in a simple supporting state, and more particularly, to install a fixing plate connecting device at the end when the girder is manufactured, and a tension member And a fixing plate connecting device for continually connecting the girder and the bottom plate, which are bridge superstructures, by mounting the girder on the pier and connecting both fixing plates of the girder, and a method of continually constructing the PSC girder bridge using the same.

In general, there are two main purposes of sequential continuity when constructing multi-span continuous bridges using PSC girders made in a simple support state at the site near the bridge construction site.

The first is to improve the durability of the bridge by eliminating the expansion joints on the upper part of the branch to prevent vehicle deterioration and to prevent deterioration or damage of the branch from leaks or cracks, and the second is the structural continuity of the bridge superstructure. This is to improve the structural efficiency and economical efficiency by lowering the height of the girder or increasing the length of the girders by supporting a part of the bending parent moment acting on the point through the.

1A, 1B, and 1C illustrate a method of continually constructing a point portion of a conventional PSC girder.

First, as shown in FIG. 1a, the PSC girder 1 manufactured at the manufacturing site with a simple support is mounted on the pier 10, and then the concrete partition wall 21 is installed and the axial direction (vehicle) on the top plate 30 of the branch portion. After reinforcing the reinforcing bar 15 in the advancing direction), there is a method of placing and curing the concrete 20 to continue the bottom plate 30.

This method is the most economical method because it is easy to construct and does not require a separate continuity device, but because the bottom plate 30 is structurally continuous, the PSC girder 1 is not continuous and structurally inefficient.

In addition, although the reinforcing bar 15 arranged in the bottom plate 30 is designed to resist the tensile stress due to the bending parent moment generated in the cross section of the point portion, in practice, the bottom plate immediately after pouring the bottom plate concrete 20 Since the 30 acts only as a fixed load, the reinforcing bars 15 reinforced to the bottom plate 30 cannot support the tension in the axial direction of the point portion, so that the sequencing effect of the bottom plate is greatly reduced, and the construction of the bottom plate 30 is performed. When the secondary fixed load and the live load action, such as the weight of the post-packaging, there is a disadvantage that the tensile crack may occur in the upper surface bottom plate 30 of the branch.

And as shown in Figure 1b, after mounting the girder (1) made of a simple support on the piers 10, the strands or rods 35 for continuity of the branches on the upper end of both ends of the branch girders (1) In addition, a method of separately installing a fixing device (not shown) and introducing a tension force to continuous the girder 1 in the axial direction is also introduced.

This method is excellent in the continuity effect on the bending parent moment acting structurally on the continuity point, but the construction cost is increased because the girder must be provided with a separate strand or steel bar 35, anchorage (not shown) However, there is a problem that the process is complicated and the air is long.

And as shown in Figure 1c, a separate sheath (38, Heath) for continuity is placed inside the PSC girder (1) made of a simple support, and the PSC girder (1) mounted on the piers (10) After the tension member 40 is continuously inserted into the sheath 38, and the bottom plate 30 is hypothesized, tension is applied to a fixture (not shown) formed at the side or the top of both girders 1.

However, this method is difficult to secure the work space necessary for the tension work in the case of forming the anchorage at the end of the girder because the tension is possible after the completion of the placing and curing of the partition 21 and the bottom plate 30 In addition, when the anchorage is provided on the side of the girder (1), since the tension member and the anchorage must be provided on both sides of the girder, a separate reinforcement cross section is required and the anchorage is exposed to the outside, which is disadvantageous for the view of the bridge. In addition, since the tensioning is performed after continuously placing the tension members in at least two girders, frictional losses between the sheath and the tension members increase, which reduces the tension efficiency and reduces the continuity effect.

Furthermore, as in the prior art, the superstructure sequencing method described in FIGS. 1A, 1B, and 1C can be carried out after installing the concrete partition wall 21 at the point, so the partition wall and the bottom plate cannot be installed at the same time. When the flexural moment is applied to the continuation point at the lowering point due to the characteristics of the method, there is a fear that the bending crack is generated in the concrete partition wall 21.

2A shows a plan view and a front view of an end of a conventional girder 1. Conventional girder end is to resist the compressive and rupture stress (tensile stress) due to the tension force acting on the end concrete when the tension member 40 is fixed using the anchorage 42, and the shear and concentrated stress due to the point reaction force Reinforcement cross section 50 is formed larger than the cross section of the girder and the location of the anchorage 42 is a mortar construction to protect the tension member 40 and the wedge (aka wedge) (not shown) fixed to the anchorage by corrosion. In order to secure the space 39 is formed spaced apart by the L2 into the girder at the end.

However, such a conventional technique can not continue the two girders in the continuity point by a mechanical method, so the length L0 and L1 of the reinforcement section 50 of the girder 1 is relatively large when the girder is manufactured, and the girder 1 There is a problem in that the overall cross-sectional area of the manufacturing cost and self-weight is increased.

Figure 2b shows a fixing plate connecting device of the Republic of Korea Patent Application No. 10-2008-0083817 filed by the present applicant of a different structure and the method of sequential construction of the PS girder bridge using the same.

As shown in FIG. 2B, in the prior art, the continuation of the girder 1 is achieved by using the fixing plate connecting device 60 installed in the vertical direction at the end of the girder 1. However, this conventional technique connects the upper side of the girder 1 by coupling the bolts 67 so as to pass through the connecting holes 65a formed in the vertical plate 65, and the lower side of the fixing plate of the 'b' section The 70 is fixed to the upper plate 80 by a bolt 77.

Therefore, such a conventional technique is to connect to be able to cope with the fixed load caused by the bottom plate, cross beam, fence fence, pavement and live load on the vehicle after the mounting of the girder (1) on the piers (10) In order to increase the thickness of the vertical plate 65, the diameter of the connecting bolt 67 is inevitably larger.

As such, there is a need in the art for technology development to effectively improve various problems raised in connection with the conventional construction method of the PSC girder bridge.

The present invention is to solve the conventional problems as described above, the object of the fixing plate connecting device that can achieve the structurally robust construction of the PSC girder bridge point construction while ensuring economic feasibility using a simple connection structure and device and using the same It is to provide a continuous construction method of PSC girder bridge.

And another object of the present invention is to be able to install the bottom plate collectively after the sequential process of the PSC girder, the construction speed is very fast, the material and provisional equipment is minimized, the labor cost is greatly reduced, the construction cost according to the air shortening It is to provide a fixing plate connecting device that can be reduced and a continuous construction method of PSC girder bridge using the same.

In order to achieve the above object, the present invention is formed integrally with the end of the girder, made of a width larger than the abdominal width of the girder, the vertical portion formed in the vertical direction in the cross section of the girder, and the vertical portion An upper connection part formed in the longitudinal direction of the girder at an upper end, and a lower connection part formed in the longitudinal direction of the girder at the lower end of the vertical part, and the vertical part has a plurality of connection holes penetrating in the vertical direction from both outer sides of the girder; A fixing plate having an inverted '?' Type cross section formed; And a connector including a fixing bolt and a nut inserted into the connection hole to integrally connect the fixing plates of adjacent girders to each other. The connecting parts are integrally connected in the axial direction in the point portion, and the fixing plates are adjacent to each other. It provides a fixing plate connecting device that connects the upper ends of the girders to each other to support bending parent moments occurring at the point portions, and connects the lower ends of adjacent girders to each other and supports the bending constant moments occurring at the point portions, thereby continually girders. . Such a fixing plate connecting device of the present invention is significantly shorter than the conventional construction speed is shortened the air, the connection effect is excellent, the cause of the occurrence of cracks in the bottom plate of the branch is fundamentally eliminated, fixed load and girder weight It can effectively support the point parent generated by the live load, which can reduce the height of girders and increase the length of the ground, thereby improving the structural efficiency.

And in order to achieve the above object, the present invention is formed integrally with the end of the girder, made of a width larger than the abdominal width of the girder, the vertical portion formed in the vertical direction in the cross section of the girder, and the vertical An upper connection part formed in the longitudinal direction of the girder at the upper end of the part, and a lower connection part formed in the longitudinal direction of the girder at the lower end of the vertical part, and the vertical part has a plurality of connection holes in the longitudinal direction from both outer sides of the girder; Providing a fixing plate having an inverted '?' Shaped cross section formed at one or both ends of the girder when the PSC girder is manufactured, and tensioning and fixing the tension member provided in the girder to the fixing plate; Mounting a plurality of girders on a pier so that the fixing plate faces each other at a point portion; Inserting a barrier member made of steel between the fixing plate and the fixing plate, inserting a bolt into a connection hole passing through the fixing plate and the partition member, and fastening with a nut to continually girder the connector; Connecting a base to a lower connection portion extending from the lower portion of the fixing plate; Connecting a cover plate to an upper connection part extending from the upper part of the fixing plate; and providing a reinforcing bar to the bottom plate of the upper part of the girder and constructing the bottom plate. Through the continuous construction method of the PSC girder bridge as described above, the present invention can significantly shorten the construction speed and shorten the air compared to the conventional construction method, and the construction method is simple and the construction speed is greatly improved, thereby reducing the construction cost.

According to the present invention, the structure of the fixing plate connecting device and the method of constructing the connection part are simple, so that the construction is very simple compared to the conventional method in terms of workability. In particular, according to the present invention, the fixing plate connecting device is provided at the production site when the girder is manufactured, and the girder continuity structure is completed by simply connecting the bolts after the girder is mounted to the branch part, and the bottom plate construction is a subsequent process immediately after the construction of the connecting part. Since the process proceeds, the construction speed is significantly improved as compared with the conventional method, and the air is shortened.

In addition, according to the present invention, the tension member of the girder made of a simple support in terms of structure is completely connected with a mechanical connecting device, and the bottom plate is constructed after the connection part is constructed so that the cause of cracking of the bottom plate is fundamentally eliminated. In addition, it is possible to support the point portion moments generated by the fixed load and live load except the girder self weight, which can reduce the height of the girder and increase the length of the ground, thereby improving the structural efficiency. In addition, according to the present invention, only one support base may be installed per branch part, thereby reducing the construction cost and maintenance cost.

In addition, according to the present invention is made of a material that can be easily secured in the field, such as a thick plate for fixing plate, high-tensile bolts, such as fixing plate in the economic aspect, and the mass production is possible, The production cost is minimized, the construction method is simple, and the construction speed is greatly improved, so labor cost is greatly reduced and construction cost can be reduced due to shortening of air.

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

The fixing plate connecting device according to the present invention and the continuous construction method of the PSC girder bridge using the same can be applied to all precast PSC girder bridges having I-type, T-type, and box-shaped cross-sections. The present invention will be described with reference to a precast PSC girder having.

The fixing plate connecting device 100 of the present invention will be described with reference to FIGS. 3A to 5D.

Fixing plate connecting device 100 of the present invention is provided with a fixing plate 120 having a larger size than the end cross-sectional area or the girder abdomen width at the end of the girder 110, the fixing plate 120 is inverted '' Has a structure. Such a fixing plate 120 is integrally formed at one side or both ends of the girder 110, a plurality of holes in a position corresponding to the PC cone 134a disposed inside the girder in the vertical portion 130 of the fixing plate 136 is formed so that the tension member 134 and the wedge 134b is located.

The fixing plate 120 has an upper cross section 140 and a lower connecting portion 150 formed on the vertical portion 130 and upper and lower ends thereof, respectively, to have an inverted 'C' cross-sectional structure.

In addition, the fixing plate 120 has a plurality of studs S formed on the back of the vertical part 130, the upper connection part 140, and the lower connection part 150, respectively, to increase the bonding force with the concrete material of the girder 110. A plurality of connection holes 132, 142, and 152 are formed to be connected to each other by the fixing plate 120 and the bridge bearing 300 adjacent to each other and the fixing bolt B and the nut N.

Here, the material, thickness, width, and diameter and quantity of the connection holes 132, 142, and 152 of the fixing plate 120 are tension forces introduced into the girder 110, and parent and static moment acting on the point. It depends on the axial force and moment generated by the joint and the shear force on the point.

As described above, in the fixing plate connecting device 100 of the present invention, as shown in FIGS. 3A and 3B, a plurality of holes 136 are formed to fix the tension member 134 on the plate-shaped vertical portion 130. At least one connection hole 132 penetrating through the fixing plate 120 so that the one side fixing plate 120 and the other fixing plate 120 can be connected to each other after mounting both girders 110 on the piers 200. It is formed in the longitudinal direction (up and down, vertical direction) on both outer sides of the width of the girder 110.

That is, the connection holes 132 positioned to be outside the width of the abdomen of both girders 110 to simply connect the adjacent fixing plate 120 from the outside.

In addition, at least one stud S may be provided on the rear surfaces of the fixing plate 120 (vertical portion, upper and lower connecting portions) to integrate the fixing plate 120 with the concrete constituting the girder 110. have.

Such an inverted 'c' type fixing plate 120 is produced by bending a plate, or by welding a steel plate in the horizontal direction on the top and bottom of the plate. In particular, lengthening the length of the upper connecting portion 140 and the lower connecting portion 150, and installing the optimal number of studs (S) to further improve the connection between the girder 110 and the fixing plate 120 is made of concrete The advantages of being

Introduced when the tension member 134 is directly tensioned and fixed to the girder 110 through the hole 136 formed in the fixing plate 120 and the conventional wedge 134b by the fixing plate connecting device 100 of the present invention. Since the girder longitudinal compression force can be evenly distributed to the cross section of the girder 110 through the fixing plate 120, as shown in FIG. 3B, the reinforcement cross-sectional sizes L0 and L1 of the girder 110 to which the present invention is mounted. It can be seen that can be reduced compared to the size of the reinforcement cross-section of the conventional girder 1 can be seen in Figure 2a.

That is to say that by replacing the role of the reinforcing cross section of the conventional girder 1 of the fixing plate 120 of the present invention, the reinforcing cross section of the girder 110 to apply the fixing plate connecting device 100 of the present invention as shown in Figure 3b Length L0 and L1 can be formed smaller than the conventional girder 1 can be seen that the entire cross-sectional area of the girder 110 of the present invention can be reduced, thereby reducing the girder manufacturing cost and self-weight.

In addition, the present invention does not require a construction space (39, see Fig. 2a) for the construction of the mortar at the end of the conventional girder 1 as shown in Figure 2a because the tension member 134 is directly fixed to the fixing plate 120 after the tension It has the advantage of ease of construction and girder fabrication,

As the disappearance of the construction space, there is no loss of cross-sectional area due to the construction space, so that the shear surface including the girder end can resist the load. It can be seen that the resistance to the compressive force and, after the hypothesis, can resist the vertical force transmitted from the point reaction force, thereby improving the load resistance efficiency.

And as shown in Figure 4a, the fixing plate connecting device 100 of the present invention has a horizontal reinforcing material 122 or vertical reinforcing material (122a) on the rear to prevent deformation of the fixing plate 120 during connection construction to be described later It may be further formed. This is because the width of the vertical plate 130 of the fixing plate is larger than the width of the end face of the girder to prevent deformation of the fixing plate using the reinforcing materials 122 and 122a.

Alternatively, as shown in FIG. 4B, the vertical portion 130 of the fixing plate connecting device 100 press-processes the groove 138 to the size of the PC cone 134a on the rear surface thereof, and the tension member 134 and the wedge 134b. When the tension is fixed after the tension 134 and the wedge (134b) is preferably made of a structure that does not protrude out of the fixing plate 120.

In addition, since the bending parent is generated in the point portion immediately after the bottom plate 310 is poured, the compressive force acts on the lower end of the fixing plate connecting device 100 so that the vertical portion 130 of the fixing plate connecting device 100 is formed. Schematically, even if only about 1/2 of the height of the girder 110 can be exhibited a continuous function.

And the fixing plate connecting device 100 of the present invention, as shown in Figure 5a, the upper cover plate 160 provided on the upper portion of the fixing plate 120, the steel partition wall member 170 of approximately 'I' shape ), And a support upper plate (the same reference numeral as the lower cover plate) serving as a lower cover plate 180 or a lower cover plate provided at the lower portion of the fixing plate 120.

Look at the assembly method of the girder 110 by the fixing plate connecting device 100 of the present invention.

Fixing plate connecting device 100 of the present invention is connected to the end of the girder 110 in the axial direction at the point portion is installed for the purpose of supporting the bending moment generated in the point portion fixing plate connecting device 100 It is necessary to continuum the point bending parent by connecting in the manner described later from the top of the girder 110.

In addition, there is a possibility that bending constant moment may occur at the point due to bridge construction characteristics or settlement of the point, and thus, the fixing plate connecting device 100 may be connected to the bottom of the point girder 110 by the method described later, and thus the bending moment is constant. Continual construction is also carried out.

5A illustrates a connection assembly diagram of the fixing plate connecting device 100 of the present invention. The shape of the tension member 134 is fixed to the fixing plate 120 with the wedge 134b immediately after introducing the tension force to the girder 110 provided with the fixing plate connecting device 100 of the present invention, as shown in FIG. 5A.

That is, the fixing plate connecting device 100 of the present invention, as shown in Figure 5a has a plurality of holes in the vertical portion 130 constituting the fixing plate 120 to correspond to two or more or all of the fixing holes (134a) 136 is formed to fix the tension member 134 protruding through the hole to the fixing plate 120 by the wedge 134b. After the fixing, adjacent girders 110 are further continuous with each other.

As described above, in the fixing plate connecting device 100 of the present invention, when the girder 110 is installed at the point above the piers 200 for continuity of the branch parts, the fixing plate connecting device 100 integrally formed at both ends of the girder faces each other. The two girders are continuously connected to each other in a structure in which a high tension bolt B is inserted into the connection hole 132 of the vertical plate 130 formed in the fixing plate connecting device 100 facing each other and fixed with a nut N. (The high tension bolts (B) and nuts (N) as such are commonly referred to as connectors 220.)

In the fixing plate connecting device 100 of the present invention, the connecting hole 132 formed in the vertical portion 130 is installed as close as possible to each tension member fixing opening 134a in order to effectively connect both tension members 134 mechanically. It is preferable.

In addition, as described above, sequencing of the girder to which the fixing plate connecting device 100 of the present invention is applied, the fixing plate 120 of one girder is further fixed to the fixing plate 120 of the other girder since both girders are continuous by the connector. To be mechanically connected.

This is achieved by the connection of the girder by the upper cover plate 160, the lower cover plate 180 provided on the lower portion of the fixing plate 120 as described above.

In detail, the upper cover plate 160 is installed so that the upper surfaces of the fixing plate 120 are covered together, and a lower upper plate 180 formed integrally with the lower cover plate or the bridge support is installed on the lower surface, such an upper cover. The plate and the lower cover plate is connected through the connector 220 of the fixing plate and the high tension bolt (B) and nut (N).

Typically, the gap between the girders 110 and the girders 110 mounted on the point portion is about 200 mm or more, but in the case of applying the present invention, because the vertical plates 130 of the fixing plate are connected to each other and connected to the girders ( 110) and the girder 110 can be installed in close contact, and in the case of the girder continuously connected to each other by the upper cover plate and the lower cover plate, even if only one bridge support 300 is installed on the pier 200, both girders are installed. Since it can be supported, the width of the coping portion of the pier 200 can be significantly reduced compared to the conventional construction method has the advantage that can also reduce the pier construction cost.

And the fixing plate connecting device 100 of the present invention, as shown in Figure 5b, the connector 220 and the connection hole 132 between the vertical portion 130 of the fixing plate 120 respectively installed on both sides of the girder 110 By using the partition wall member 170 is to be installed.

The partition member 170 may be constructed using only a plate, but since a bending moment may occur in the axial direction perpendicular to the partition member 170, a conventional I-shaped steel may be cut or used as a built-up steel plate. It is preferable to manufacture and install so that it may become a shape.

In general, when the multi-span bridge continuous construction is performed using the PSC girder 110 made of a simple support, a large section is prepared to prepare for the structural uncertainty of the continuous structure of the branch part and to secure a work space for reinforcement of the continuous construction. Although constructing a concrete partition wall 21, but using the fixing plate connecting device 100 of the present invention, that is, the fixing plate 120, the upper cover plate 160 and the lower cover plate 180 of the girder 110 Since perfect continuity can be achieved, the cross-section of the partition member 170 can be designed and hypothesized to the level of cross beams that hypothesize the cross section of the partition member 170 within the girder 110.

Therefore, the partition member 170 of the present invention may be referred to as a multi-purpose configuration having a function of a conventional partition wall while serving as a cross beam.

Such a partition member 170 is made of a high-strength metal material, the member exposed to the outside air after construction is preferably to prevent corrosion by coating, ceramic coating, or hot dip galvanizing.

As shown in FIG. 5B, the partition member 170 may be constructed of an I-type steel, but in order to reduce the steel and simplify the structure of the partition, as illustrated in FIG. 5C, a bracing having an 'X' shape ( 172) Only the structure can complete the construction of the partition member 170.

In such a bracing 172 structure, the member is preferably coated, ceramic coated, or hot dip galvanized to prevent corrosion.

The fixing plate connecting device 100 of the present invention is fastened with a nut (N) by inserting a high-tensile bolt (B) in the connection hole 132 formed in the vertical portion 130 adjacent to each other as described above,

Fastening the connection holes 142 of the upper connecting portion 140 and the connecting holes 162 of the upper cover plate 160 with a high tension bolt (B) and a nut (N),

The connecting holes 152 of the lower connecting part 150 and the connecting holes 182 of the lower cover plate 180 are fastened with a high tension bolt B and a nut N.

The continuity construction of the final girder is completed.

Furthermore, as shown in FIG. 5A, in the case of the lower cover plate 180, a protrusion 181 is further formed on the upper surface of the lower cover plate 180 to connect the vertical plates 130 of the girder to each other. Before installing the top cover plate 160, as shown in Figure 5d,

After the non-shrink grouting is constructed in the closed space (P) formed between the fixing plate 120 and the fixing plate 120, by combining with the upper connection portion 140,

Corrosion of the tension member 134 and the wedge 134b located in the closed space can be prevented, and when the shrinkage grouting is performed in the closed space P, the compressive force acting in the girder longitudinal direction in the continuity structure is supported. The effect can be exerted.

Furthermore, looking at the manufacturing and installation procedure of the fixing plate connecting device 100 of the present invention as described above as follows.

Fixing plate connecting device 100 of the present invention is embedded at the same time when the girder (110), embedded in the formwork (not shown). When the concrete curing of the girder 110 is completed, the tension member 134 is fixed by using the tension member insertion hole 136 formed in the center of the fixing plate 120.

Then, before mounting the girders 110 to the piers 200 or shifts, the base 300 provided with the lower cover plates 180 may be installed on the piers 200 or shifts, and the lower cover plates may be described later. Support 300 including the 180 may be pre-installed on the bottom surface of one end girders 110.

In this process, the present invention mounts the plurality of girders 110 on the pier 200 to face each other, wherein the partition plate 170 made of steel faces the fixing plate 120 and the fixing plate 120 facing each other. Insert it.

When the mounting of the piers 200 of the girder 110 is completed as described above, the vertical portions 130 of the fixing plate 120 are connected using the high tension bolts B and the nuts N, and the lower cover plate 180 is disposed. To tighten the lower connection portion 150. In addition, in order to prevent corrosion of the fixing plate 120, the tension member 134, and the wedge 134b, non-contraction grouting is performed in the closed space P formed between the fixing plate 120 and the fixing plate 120.

Next, the upper cover plate 160 is coupled to the upper connection portion 140 of the fixing plate 120 by using a high tension bolt B and a nut N to complete the sequential construction.

When the sequential construction is completed as described above, after the formwork is installed on the upper surface of the girder 110 by the method of constructing the bottom plate, the reinforcing bars 312 are placed and the bottom plate 310 concrete is poured to complete the bridge upper structure.

Therefore, when the fixing plate connecting device 100 of the present invention is applied, the construction of the bottom plate 310 can be performed immediately after the girder 110 continuity process, and the air is greatly shortened.

6A and 6B, a continuous construction method of resisting bending constant moment acting at a point portion using the fixing plate connecting device 100 according to the present invention will be described in detail.

The continuous construction method according to the present invention is continuous to the top of the point girders 110 as the fixing plate connecting device 100 of the present invention described above, the lower connecting portion 150 and the lower cover plate or bridge at the bottom end of the girder 110 The base plate 180 integrally formed on the base 300 is integrally connected to the base plate 300 to provide a complete continuous structure.

When the girder 110 equipped with the fixing plate connecting device 100 of the present invention is mounted on the bridge, the bridge support 300 may be pre-installed on the pier 200 and the girder 110 may be mounted, but the girder 110 may be mounted thereon. ) Is introduced into the tension force, the expansion and contraction may occur in the girder 110 due to the effect of dry shrinkage, creep of the concrete, and the difference between the design drawings and construction details may occur due to manufacturing errors.

Therefore, as shown in Figure 6a, after connecting the bridge bearing 300 to the lower connection portion 150 provided on the lower end of one side girder 110, just before or just after the piers 200, the top of the piers 200 Temporarily mounted through the temporary support 330 to the support surface formed in.

In addition, the bridge bearing 300 may be constructed by performing non-contraction mortar 332 or grouting around the anchor bolt 333 on the receiving receiving surface previously formed on the bridge 200.

At this time, the temporary support 330 is adjustable to support the mounted girders 110 before the non-shrink mortar 332 is cured, and the temporary support 330 after the support 300 is completed. It can also be removed.

And the other girder 110 as shown in Figure 6b to face the girder 110, when the pier 200 is completed, the partition member 170 between the vertical portion 130 of the fixing plate 120 ) And connect the vertical portions 130 of the fixing plate 120 by using the high tension bolt B and the nut N of the connector 220.

In addition, the lower cover plate 180 is used to tighten the lower connection part 150 of both girders 110. In addition, in order to prevent corrosion of the fixing plate 120, the tension member 134, and the wedge 134b, the sealing plate P is formed between the fixing plate 120 and the fixing plate 120 (see FIG. 5D). Contract shrink grouting.

Next, the upper cover plate 160 is coupled to the upper connecting portion 140 of the fixing plate 120 provided on both side girders 110 using a high tension bolt (B) and a nut (N) to complete the sequential construction. .

As described above, in the case of connecting a plurality of precast girders 110 manufactured by a simple support, as shown in FIGS. 6A and 6B, only one bridge support 300 may be installed. It can be seen that the continuous structure can be provided, and thus there is an advantage that can reduce the coping portion width of the piers 200.

In addition, complex stresses such as vertical stress and burst stress are generated at the points of the girder 110. The lower cover plate 180 is integrally constructed at the lower connection portion 150 of the fixing plate 120, and thus is formed at the end of the girder 110. In addition, the fixing plate 120 may bear a part of the stress concentrated in the girder 110, thereby removing the cause of damage to the point portion due to the stress concentration.

After the girder 110 is mounted on the pier 200 as described above, immediately after both girder 110 is connected to the fixing plate connecting device 100, the girder 110 is supported by the girder 110, so that the continuous structure is In a stress-free state, the bending parent moment acts on the continuous structure immediately after the cross beam and the bottom plate 310 are poured.

Therefore, the fixing plate connecting device 100, the upper cover plate 160 and the lower cover plate 180 of the present invention may be designed to support at least the cross beam, the bottom plate 310, the construction load, packaging, fence fence self-weight. .

This is because the reinforcing bars 312 are reinforced to the bottom plate 310 in the axial direction by a method which will be described later, because the bending parent moment due to the use load (live load) may be designed to support the reinforcing bars 312 in the axial direction. .

Empirically, the ratio of the upper structure secondary fixed load (crossbeam, bottom plate 310, pavement, protective fence self-weight) and live load except for the girder 110 self-weight is approximately 6: 4, so that the fixing plate connecting device 100 of the present invention The load (bending moment) share ratio can be designed to be about 60%.

As described above, the sequential construction method using the fixing plate connecting device 100 of the present invention has an end reinforcing effect of the girder 110, and thus the girder 110 axial force acting on the point even when the end surface of the girder 110 is applied. It can safely resist overstress and shear force.

On the other hand, as shown in Figure 7, due to the settlement of the pier 200 there is a fear that the bending moment is generated in the continuous section on the pier 200, in order to cope with the lower connection portion 150 formed in the lower portion of the fixing plate 120 ) Are connected to each other by the lower cover plate 180 is structurally preferable.

On the other hand, the conventional continuous construction method described above, that is, the method of reinforcing the reinforcing bar 312 of the bottom plate 310 in the axial direction and the conventional method of placing the tension member 134 on the top of the point girders 110 to continually In the case where the unequal settlement of the piers 200 occurs as described above, bending cracks may occur in the partition member 170 and the bottom plate 310, but in the present invention, the lower connection parts 150 may be formed by the lower cover plate ( 180) to correspond firmly to the bending moment.

8 is connected to the girder 110 and the girder 110 in the axial direction by using the fixing plate connecting device 100 of the present invention in the axial direction, and after the girder 110 is a continuous construction, for the construction of the bottom plate Install the formwork and further reinforce the reinforcing bar 312 in the axial direction and the perpendicular direction to the top plate 310 of the girder 110, and the PSC girder bridge 400 by pouring and curing the bottom plate 310 concrete The completed step is shown.

In addition, it is preferable that the bottom plate 310 and the girder 110 be integrally constructed by constructing a plurality of studs S on the upper end of the upper cover plate 160.

In addition, after installing a plurality of studs on the upper end of the partition member 170 as shown in Figure 8, the bottom plate 310 is installed on the upper end of the partition member 170, and the partition member and the bottom plate 310 are integrated. It is desirable to be able to behave.

Therefore, according to the present invention, the construction of the bottom plate 310 can be continuously performed immediately after the point sequencing process is completed. Therefore, the construction speed is very fast compared to the prior art.

A social construction method according to the present invention will be described with reference to FIG. 9B.

After mounting the girder 110 provided with the fixing plate connecting device 100 according to the present invention on the piers 200 to correspond to the square, partition member manufactured to correspond to the square between both fixing plate connecting device 100 ( 170) and then insert the connector consisting of bolts and nuts to continue the girder (110). The bridge is completed by performing the same subsequent steps as described in the above embodiment.

Therefore, the PSC girder bridge 400 hypothesized by the present invention can be effectively applied to both a straight bridge as shown in FIG. 9A and a bridge as shown in FIG. 9B.

10 is a connector 220 on the upper surface of the upper connecting portion 140 of the fixing plate 120 in order to more firmly connect the upper connecting portion 140 and the upper cover plate 160 of the fixing plate connecting device 100 according to the present invention. ) Is installed by welding a plurality of bolts (B) in the vertical direction, and a connection hole 162 corresponding thereto is formed in the upper cover plate 160 to connect with the nut N of the connector 220. It is.

In addition, the plurality of bolts B of the connector 220 are installed downward in the vertical direction on the lower surface of the lower connection part 150 of the fixing plate 120, and the corresponding connection holes 182 are provided on the lower cover plate 180. It may be formed by connecting to the nut (N) of the connector (220).

And it can be seen that the reinforcing cross-section is omitted in the girder end is formed in the fixing plate connecting device 100 of the present invention shown in FIG. This is because the vertical portion 130 of the fixing plate connecting device 100 can support the compressive force acting in the longitudinal direction of the girder due to tension and tension of the tension member at the end of the girder, thereby reinforcing the conventional girder 1 without structural loss. The cross section can be omitted.

In particular, the connection hole 132 formed in the vertical portion 130 of the fixing plate connecting device 100 according to the present invention can be formed closer to the fixing unit 134a on both sides of the girder 110, one side girder tension member and the other side. The girder tension member can be connected more effectively, and the width and thickness of the vertical fixing plate 130 can be further reduced.

Therefore, according to the embodiment it is possible to form a plurality of connectors on the fixing plate 120 can reduce the diameter of the high-tensile bolt (B), it is provided a more robust connection structure.

Hereinafter, the advantages of the present invention will be described in comparison with the prior art.

First, the case of the installation method of the sequential installation method of the CS plate girder bridge using the fixing plate connecting device of the Korean Patent Application No. 10-2008-0083817 previously filed by the applicant.

The conventional technology is to connect the fixing plate using only the connection hole formed in the vertical portion, so that it can cope with the fixed load caused by the bottom plate, cross beam, protective fence, pavement and live load on the vehicle after the girder is mounted In order to connect, the thickness of the fixing plate is increased and the diameter of the connecting bolt is also large.

However, in the case of the present invention, since the upper cover plate 160 is added, the fixing plate 120 can be firmly connected in the axial direction, and the cross section of the vertical portion 130 can be greatly reduced. As such, when the load sharing ratios of the upper cover plate 160 and the vertical portion 130 are each 1/2 level in the continuity connection of the girder 110, theoretically, it is perpendicular to the patent application No. 10-2008-0083817. The thickness of the portion 130 can be reduced to about 1/2. In addition, according to the present invention, since the reinforcement cross section which is normally formed at the end of the girder 110 can be omitted, the width of the vertical portion 130 can be greatly reduced.

In addition, the present invention, because the vertical portion 130 is reinforced by the upper cover plate 160 formed by connecting to the vertical portion 130, it is possible to suppress the deformation of the vertical portion 130 during the load action.

In other words, the sequential construction method of the present invention connects the upper connecting portion 140 of the fixing plate 120 formed on both girders 110 using the upper cover plate 160 at the same time, so that the performance of the connecting portion is greatly improved compared to the prior application. Will be.

Furthermore, in the present invention, the high-strength bolt (B) is fastened in the connecting holes 132, 142, 152 exposed to both sides, the upper surface, and the lower surface of the girder 110, so as to secure a connection work space compared to the prior application. Workability and construction quality can be improved.

In addition, the present invention is characterized in that the partition member is formed on the fixing plate connecting device 100 at the same time, so that the separate partition construction process is omitted, and the construction speed is very fast as compared with the patent application No. 10-2008-0083817.

And prestressed reinforced concrete using PC steel wire and tee type steel plate of Patent No. 10-499976 according to the prior art and the bridge construction method using the same, Prestressed steel reinforced concrete beam using a steel plate on the upper and lower flanges of Patent 10-504266 and its manufacturing method , The continuous structure and the continuity method of the middle point portion of the prestressed concrete girder bridge of Patent 10-566653 will be described in comparison with the present invention.

The conventional techniques are about 50-60% of the bending moment moment acting on the center portion of the girders 110 at the point of the girder 110, and when the steel sheet is continuously constructed, the size of the steel sheet is large and the quantity is large. Shear connector is required, and due to the stress acting on the shear connector has the disadvantage of generating structurally unfavorable stress on the concrete on the top of both girders.

On the other hand, in the present invention, since the upper cover plate 160 is continuously formed on the fixing plate 120, the tension plate 134, the fixing hole 134a, and the tensile force transmitted from the fixing plate 120 are fixed to the fixing plate 120 and the upper portion. Since the structure to resist using the cover plate 160 to mechanically connect the tension member 134 of both girders 110 to provide a structurally effective connection method without the installation of a large number of shear connectors.

In addition, the prior art can be seen that the construction of a separate portion of the concrete partition wall 21 immediately before connecting the girder to the steel sheet and connecting the steel plate to the remaining partition member construction. However, once the steel plate is connected, constructing the concrete partition wall 21 in the lower part thereof is poor in workability and it is difficult to securely place concrete on the lower part of the steel plate, which may cause difficulty in securing quality. On the other hand, in the case of the present invention, since the separate partition member 170 construction process is included in the sequencing process, the construction speed is fast and quality control is easy.

In addition, the present invention is safer and more robust than the structure and method of continuation of the prestressed concrete beam middle point using the sequencing method of the prestressed concrete beam of patent 10-690395 and the sole plate of patent 10-529518.

In the prior art, after mounting both side girders with a predetermined clearance to the point portion, connecting the lower connection portion provided at the lower end of both ends of the girder by welding or the like, and placing the partition member on the upper surface of the connecting portion and continuous with one support It can be seen that the construction supporting the support girders is constructed.

As described above, the conventional technology is structurally supporting the vertical load due to the live load as well as the self-weight of the upper structure with the partition wall 21, but the partition member is installed to connect the girder in the perpendicular and axial directions of the girder, and acts on the girder end. Since it is not a cross section formed to resist the vertical force, it is impossible to safely support the vertical force acting on the end of the girder even if the reinforcing bar is reinforced. It may occur.

In the PSC girder bridge consisting of four girders, the vertical force (point reaction force) acting on the point of 30 m girder is approximately 100 tons (1,000 kN), which can safely support the point reaction by the post-installed bulkhead member. It is difficult to design the partition member cross section. This is because the girder and the girder can not be in close contact in the axial direction due to the construction characteristics of the conventional method.

However, in the case of the present invention, the lower connecting portion 150 provided at the lower ends of both girder 110 is firmly connected using the lower cover plate 180 in the horizontal direction, and extends to the lower connecting portion 150 in the vertical direction. The vertical portion 130 formed by the high tension bolt (B) is connected to provide a solid connection. In particular, when the present invention, the end of the girder 110 and the girder 110 is constructed with a minimum clearance, roughly the thickness of the partition member 170, so even if one support 300 is constructed on both side girders 110 Since the end of the support 300 can be directly supported by the vertical load (shear force) transmitted from the superstructure can be safely supported by the continuity structure of the present invention and effectively transferred to the substructure.

The advantages of the present invention will be described in contrast to another prior art beam connection member and steel beams in the prior art, which is a continuous structure of the precast PSC beam and a bridge construction method using the same.

The prior art is provided with a 'c' and an inverse 'c' connecting member at both ends of the girder, and includes a connecting member to fix the tension member by using a conventional anchorage (not shown), and the concrete inside the connecting member. After pouring, the continuity tension member is additionally placed in the groove penetrating the connecting member in the axial direction, and the tension force is introduced to achieve bridge continuity.

Therefore, since the prior art forms a steel partition member at the continuation point and achieves a continuous construction by using the steel partition member, the connection member of the closed end surface formed at the end of the girder is not directly resistant to the axial direction momentum. Since the connecting member is utilized only as a compression block in the continuous structure, it can be seen that the tension member is not connected by a mechanical method even if the tension member extending from the girder is fixed to one or both sides of the connection member. In addition, in the method of forming the support, since the support supports the compression block, it is necessary to form a vertical reinforcement material.

On the other hand, in the present invention, the tension member 134 is directly fixed to the tension member fixing opening 134a formed in the fixing plate 120, and the fixing plate 120 and the fixing plate 120 fixed at both ends of the girder 110 are fixed. Since the direct connection in a mechanical manner is possible to the continuity of the tension member 134, in addition to the upper cover plate 160 and the lower cover plate 180 by interconnecting to achieve a robust continuity structure in the axial direction.

In addition, the support 300 formed on the lower surface of the girder 110 does not support the connection member (compression block) as in the prior art, but directly supports the lower ends of both girders 110 so that the shear force transmitted from the upper structure is safely. I can support it.

And it will be described the advantages of the present invention in contrast to the stabilization method of the PS concrete girder fixing end by the fixing fixture fixing steel sheet of the prior art patent 10-691743.

The prior art is provided with a box-shaped reinforcement surrounding the end of the girder and a fixed steel plate on which the tension fixing unit is fixed to provide a method for effectively resisting the stress generated in the stress disturbance portion of the girder end.

However, it can be seen that the conventional technology does not interconnect the fixed steel plates formed at both end girders after being mounted at a point, and does not form a support under the fixed steel sheet, so it is not a girder continuity method. Therefore, the conventional technique is limited to the stabilization method of the girder anchoring end, but the fixing plate connecting device 100 and the sequential construction method provided in the present invention, as well as the reinforcement of the stress disturbance site, as in the conventional technique, the girder 110 This is applied to the continuous construction of

In addition, as described above, the conventional method for constructing the PSC girder through the multi-stage tension is applied, but this method may cause problems in bridge maintenance.

Another advantage of the present invention will be described in contrast to the conventional multi-stage tensioning process.

Since the PSC girder bridge 400 manufactured by the present invention is constructed and constructed of a plurality of girders 110, when some of the girders 110 constituting the bridge need to be replaced due to aging, etc. If only a part of the plate 310 is removed, the girder 110 and the partition member 170 which are continuously constructed are exposed. And since such a girder 110 and the partition member 170 is connected by a high tension bolt (B), after dismantling the connection, only the corresponding girder 110 can be replaced.

On the other hand, in the sequencing method by the conventional multi-stage tensioning method, since the secondary tension member applied to the sequencing is continuously arranged and tensioned in the girder in the axial direction, the entire secondary tension member is replaced when only one girder is replaced in the multi-span bridge. There is a disadvantage to be removed.

In addition, the fixing plate connecting device of the present invention and the PSC girder sequential construction method using the same perfectly connects the tension member 134 of the girder 110 made of a simple support in terms of the structure to the mechanical fixing plate connecting device 100. Since the bottom plate 310 is constructed after the connection part construction, the cause of cracking of the bottom plate 310 is fundamentally eliminated, and the branch part parent generated by the fixed load and the live load except the self-weight of the girder 110 is removed. Since it is possible to support the reduction of the height of the girder 110 and the increase in the length of the geodetic can improve the structural efficiency.

In addition, the fixing plate connecting device 100 of the present invention is composed of a thick plate constituting the fixing plate 120, a material such as a high tension bolt (B) and a nut (N) that can be easily obtained by the person in the field and mass production Because of this possible structure, the material and manufacturing cost is minimized, the construction method is simple, and the construction speed is greatly improved, so labor cost is greatly reduced and construction cost can be reduced due to shortening of air.

Although the present invention has been described in detail with reference to the accompanying drawings, the present invention is not limited to such a specific structure. Those skilled in the art will be able to variously modify or change the embodiments of the present invention without departing from the spirit and scope of the present invention as set forth in the claims below. Nevertheless, it is intended that it be clear in advance that all simple shapes or structural modifications of the components fall within the scope of the present invention.

1A, 1B and 1C are explanatory views showing a branched PSC girder sequencing method according to the prior art;

Figure 2a is a plan view and a front view showing a reinforced cross section of the girder according to the prior art, Figure 2b is a cross-sectional view showing a detailed coupling structure of the girder in the point PSC girder sequencing method according to the prior art;

Figure 3a, 3b is a side view, end plan view and front view of a girder with a fixing plate connecting device and a fixing plate connecting device according to the present invention;

Figure 4a, a detailed view showing embodiments of the horizontal and vertical reinforcement for preventing deformation of the fixing plate provided in the fixing plate connecting device according to the present invention; Figure 4b is a detailed view showing a PC cone installation method on the back of the fixing plate connecting device according to the present invention;

5A, 5B, 5C, and 5D are cross-sectional views illustrating a structure in which girders equipped with a fixing plate connecting device according to the present invention are disposed on a piers and coupled to each other to continually connect them;

Figure 6a, Figure 6b is a side view showing a method for mounting the PSC girders on a pier or alternating using a fixing plate connecting device according to the present invention;

Figure 7 is a side view showing a state in which the floating settlement of the piers in the two-span continuous bridge;

8 is a cross-sectional view showing a cross section of a bridge constructed by the method of sequential construction of the PSC girder bridge according to the present invention;

9A and 9B are plan views showing a structure in which a method of serializing a PSC girder bridge using a fixing plate connecting device according to the present invention is applied to a straight bridge and a bridge, respectively;

10A and 10B are exploded perspective views illustrating a modified embodiment structure of a fixing plate connecting device according to the present invention;

Description of the Related Art

1,110 ..... PSC Girder 10,200 ..... Pier

15,312 .... Rebar 20 ..... Concrete

30,310 ..... sole plate 35 ..... anchorage

38 ..... Sheath 40,134 ..... Tension

42,134a .... anchorage 50 ..... reinforced section

60 ..... fixing plate connector 65 ..... vertical plate

70 ..... fixing plate 80 ..... shift

100 .... fixing plate connector 120 ..... fixing plate

122 .... stiffeners 130 .... vertical

132,142,152,162,182 .... Connecting hole 134 .... tension material

136 ..... Hole 138 .... Home

140 .... Upper connection 150 .... Lower connection

170 ..... bulkhead member 172 .... bracing

160 .... upper cover 180 ..... lower cover

220 ..... end connection 300 ..... bridge feet

330 .... Temporary 332 ..... Non-shrink Maltar

400 .... PSC girder bridge B, N ..... bolts (or anchor bolts), nuts

L0, L1, L2 ... Reinforcement section length P ..... Closed space

Claims (13)

In the device for continuous superstructure of multi-span continuous bridge, It is formed integrally with the end of the girder 110, the width is greater than the central cross-section abdominal width of the girder 110, the vertical portion 130 formed in the vertical direction at the end of the girder 110 and the vertical An upper connection portion 140 formed in the girder longitudinal direction at the upper end of the unit 130 and a lower connection portion 150 formed in the girder longitudinal direction at the lower end of the vertical portion 130, the vertical portion 130 A fixing plate 120 having an inverted '?' Type cross section in which a plurality of connection holes 132 are penetrated in the vertical direction from both outer sides of the girder 110; And Including the connection hole 132, the connector 220 including a fixing bolt (B) and a nut (N) for integrally connecting the fixing plate 120 of the adjacent girders 110 to each other; End portions of the girders 110 are integrally connected in the axial direction, but the fixing plate 120 connects the upper ends of the adjacent girders 110 to each other to support the bending parents generated at the point portions, and adjacent girders 110. Fixing plate connecting device characterized in that to connect the lower end of the girder (110) while supporting the bending constant moment occurring in the point portion. According to claim 1, The fixing plate 120 has a stud (S) protruding on the back of the vertical portion 130, the upper connection portion 140 and the lower connection portion 150 to form a bonding force with the concrete girder 110. To increase, the vertical portion 130 is a fixing plate connecting device, characterized in that the hole 136 for the installation of the tension member 134 is formed. According to claim 2, The fixing plate 120 is the upper cover plate 160 coupled to the connection hole 142 of the upper connecting portion 140 through the connector 220, and the connecting hole of the lower connecting portion (150) Fixing plate connecting device, characterized in that it comprises a lower cover plate 180 coupled to the connector 152 through. According to claim 2, The fixing plate 120 is an upper cover plate 160 coupled to the connecting bolt (B) protruding upward from the upper portion of the upper connecting portion 140 through the connecting hole 162, and the lower connecting portion Fixing plate connecting device, characterized in that it comprises a lower cover plate 180 coupled to the connecting bolt (B) protruding downward from the bottom of the through 150 through the connection hole (182). According to claim 3 or 4, wherein the upper cover plate 160 is a flat structure that corresponds to the width of the upper connecting portion 140, the lower cover plate 180 corresponds to the width of the lower connecting portion 150. It is made of a 'ㅗ' type cross-sectional structure, the partition member 170 of the 'I' type cross section is disposed between the fixing plate 120 adjacent to each other, the mounting space of the wedge 134b for fixing the tension member 134 To secure the, the partition member 170 is a fixing plate connecting device, characterized in that to prevent corrosion by performing painting, ceramic coating or hot dip galvanizing. The wedge for fixing the tension member 134 is disposed in the fixing plate 120 by arranging a partition member 170 and a shim plate (not shown) having an 'I' cross section between adjacent girders 110. Fixing plate connecting device, characterized in that to secure the mounting space of (134b). According to claim 5, wherein the lower cover plate 180 is located in the lower portion of the bridge support 300, the support 300 is anchor bolt (B) and the non-shrink mortar (B) on the upper surface of the bridge (200) Fixing plate connecting device, characterized in that fixed to (332). The fixing plate connecting device of claim 1, wherein the fixing plate (120) has a plurality of horizontal or vertical reinforcing members (122) formed on the rear surface of the vertical portion (130) to structurally reinforce and prevent deformation. According to claim 1, wherein the fixing plate 120 is press-processed the groove 138 to the size of the PC cone on the back of the vertical portion 130, when the tension member 134 and the wedge 134b is fixed, the fixing plate ( 120) A fixing plate connecting device, characterized in that configured not to protrude outward. The fixing plate connecting device according to claim 5, wherein the partition member (170) comprises a bracing (172) member connecting adjacent girders (110). In the method of continuous superstructure of the multi-span continuous bridge, It is formed integrally with the end of the girder 110, made of a width larger than the central cross-section abdominal width of the girder 110, the vertical portion 130 is formed in a vertical direction to the cross section of the girder 110 and the vertical An upper connection portion 140 formed in the girder longitudinal direction at the upper end of the unit 130 and a lower connection portion 150 formed in the girder longitudinal direction at the lower end of the vertical portion 130, the vertical portion 130 One or both upper ends of the girder 110 when the PSC girder 110 is manufactured with the fixing plate 120 having an inverted 'c' cross section in which a plurality of connection holes 132 are penetrated in the longitudinal direction from both outer sides of the girder 110. It is provided on, and the tension member 134 in the fixing plate 120 and the fixing step; Mounting the plurality of girders 110 on the piers 200 such that the fixing plate 120 faces each other at a point portion; After inserting the partition member 170 made of steel between the fixing plate 120 and the fixing plate 120, a bolt () is formed in the connection hole 132 penetrating through the fixing plate 120 and the partition member 170. B) inserting and fastening with a nut (N) to continually girder 110 with the connector 220; Connecting the support 300 to a lower connection part 150 extending below the fixing plate 120; And Reinforcing the reinforcing bar (312) to the bottom plate 310 of the upper girder 110 and constructing the bottom plate 310; Continuous construction method of the PSC girder bridge comprising a. The method of claim 11, wherein the step of connecting the fixing plate 120 to the connector 220 to continually connect the girder 110 connects the vertical portions 130 of the fixing plate 120 to the connector 220, After fixing the lower cover plate 180 to the lower connection part 150, the fixing plate 120 and the fixing plate 120 to prevent corrosion of the fixing plate 120, the tension member 134, the wedge 134b. The non-shrink grouting is constructed in the closed space P formed therebetween, and the upper cover plate 160 is coupled to the upper connection part 140 of the fixing plate 120 by using the connector 220. Construction method of girder bridge. 12. The method of claim 11, wherein the step of connecting the support 300 to the lower connecting portion 150 extending to the lower portion of the fixing plate 120 is to the lower connecting portion 150 provided on the lower end of one side girder 110 The lower cover plate 180 and the support 300 are connected before the bridge 200 is mounted, temporarily mounted on the support surface formed on the bridge 200 through the temporary support 330, and then on the bridge 200 The non-condensation mortar (332) or grouting to fix the support (300), and after the completion of the support 300, the temporary support (330) characterized in that the construction of the PSC girder bridge.

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