KR20150145038A - Steel composite PSC truss U girder simple bridge and continous bridge - Google Patents

Abstract

The present invention relates to a simple bridge having a steel composite PSC truss U-girder comprising: a U-girder (40) which includes a concrete lower flange (10), a pair of concrete upper flanges (20), and a pair of truss webs (30); a concrete partition block (50) for an abutment point which connects the concrete lower flange (10), the concrete upper flanges (20), and the truss webs (30) to each other in both ends of the U-girder (40); a precast half deck (60) which is installed on the concrete upper flanges (20); first and second inner PS steel wires (W1, W2) which are installed inside the concrete lower flange (10); first and second outer PS steel wires (W3, W4) which are installed on the inner space of the U-girder (40); a pair of fixing blocks and fixing parts (71a, 71b) for the first and second inner PS steel wires, which fix the first and second inner PS steel wires (W1, W2), respectively; and a pair of fixing blocks and fixing parts (73a, 73b) for the first and second outer PS steel wires, which fix the first and second outer PS steel wires (W3, W4), respectively. Therefore, the present invention improves efficiency by improving the structure and tension method of a truss connection point, the fixing blocks, the fixing parts, a saddle shape, and the PC steel wires compared with a conventional steel composite PSC truss U-girder, and reduces the weight of the girder by reducing the amount of used concrete compared with a conventional PSC U-girder.

Description

Steel composite PSC truss U girder simple and continuous bridge steel composite PSC truss U girder simple bridge and continous bridge}

The present invention relates to steel composite PSC (prestressed concrete) truss U-girder bridges and continuous bridges.

Conventionally, PSC U girder is manufactured by post tension method or pre-tension method in units of span length, and it is used as a method of sequencing by slab at the inside point part after mounting to alternation and pier. However, The girder has a large rigidity, the useability is advantageous, and the construction cost is very economical. Therefore, even if the girder is excessively increased, the girder is required to be manufactured, transported, lifted, The applicability is very limited and it is rarely applied in Korea.

In recent years, PSC U girder has been constructed in small unit segment form, and the problem has been solved in manufacturing and installation by reducing the unit weight of U girder. However, the number of connection part of segment girder is very large, In the case of small bridges, it is not economical due to the burden of the equipment cost.

In addition, the conventional steel box girder bridges are light in weight compared with PSC U girders, and they are manufactured in segment units in the manufacturing site and are assembled and mounted in the field, so that installation is very simple and very common. However, This is an economical disadvantage.

Therefore, steel U-girder with lower cost than steel box girder is used. However, compared with PSC U girder, economical efficiency is much disadvantageous. There is a part of composite girder of conventional steel and concrete, but workability is not improved. There is no utilization.

That is, the conventional steel composite PSC truss U-girder uses a steel truss abdomen in the lower flange of the PSC, and the portion where the steel truss and the lower flange of the PSC are combined and the tensioning method and fixing portion of the PS steel strand are inefficient, The weight of the girder is heavy and the steel is widely used. Therefore, the girder is not generally used in Korea, and even in some cases, it is not well evaluated in terms of usability of the bridge. In addition, the development of technologies that are more structurally stable and usable together due to the collapse of the girders in the construction process is required, and thus the development of the technology has not been advanced so far. Therefore, it is necessary to develop a technique that can increase the economic efficiency by combining steel truss and PSC bottom flange most efficiently at the point where the steel truss and PSC bottom flange, which are the most sensitive technology and difficult to construct, are synthesized.

Patent 1: Korean Patent No. 10-1109665 Patent 2: Korean Patent No. 10-0784885

In order to solve the above problems, the present invention is composed of a steel composite concrete U girder having the advantages of the PSC and the advantages of the steel material, the lower flange being composed of the lower flange of the PSC and the abdomen being made of the steel truss abdomen capable of accommodating the prestress We will provide a steel composite PSC truss U girder simple bridge and continuous bridge which solves the workability of conventional steel truss.

The present invention also provides steel composite PSC truss U girder simple bridge and continuous bridge with low construction cost and light weight of girder.

A composite composite PSC truss U girder bridge in accordance with an exemplary embodiment of the present invention includes a concrete lower flange, a pair of concrete upper flanges, and a pair of truss belts connecting both sides of the concrete lower flange with a pair of concrete upper flanges U girder included; An alternate-point concrete block-type block connecting the concrete lower flange, a pair of concrete upper flanges, and a pair of truss belts at both ends of the U-girder; A precast half deck installed on the concrete upper flange; First and second internal tension PS steel wires installed inside the concrete lower flange; First and second external tension PS steel wires installed in the inner space of the U-girder; A pair of first and second inner tension PS wire fixing blocks and a fixing unit for respectively fixing the first and second inner tension PS steel wires; And a pair of first and second outer tension PS steel wire fixing blocks and a fixing portion for respectively fixing the first and second outer tension PS steel wires, wherein the first inner tension PS wire fixing block and the fixing portion are disposed at both ends And a second internal tension PS wire fixing block and a fixing unit are installed on the concrete lower flange spaced apart from both ends of the U girder, and the first and second external tension PS wire fixing blocks and the fixing unit are installed on the U- Wherein the first and second inner tension PS strands are tensioned in a girder fabrication station and the first and second outer tension PS steel strands are alternately mounted on the U girder, After the slab is placed on top of the deck, it can be strained.

A pair of outer saddle blocks joined to the concrete bottom flange at the inside of the second inner tension PS wire fixing block and the fixing unit to deflect the second outer tension PS steel wire; A pair of inner saddle blocks joined to the concrete lower flange at the inside of the pair of outer saddle blocks to deflect the first outer tension PS steel wire; An outer steel material disposed in contact with the inside of the truss portion from each of the inner and outer saddle blocks to the concrete upper flange; A steel material connecting an upper portion of the outer steel material; And an inner steel sheath for connecting the inner and outer saddle blocks on both sides of the current center of the steel material, wherein the upward force of the first and second outer tension PS steel rods is formed by joining the left and right outer steel strips and the inner steel strips, To the upper portion through the W-shaped support structure.

A pair of external tension PS wire fixing blocks and a fusing unit installed on the concrete lower flange between the first and second internal tension PS wire fixing blocks and the fixing unit; And a saddle tube for maintenance on the inner and outer saddle blocks.

The truss portion may include a plurality of steel pipe slant members having end portions sealed and staggered, a first connecting joining portion provided at both side ends of the steel pipe slant member to connect the steel pipe slant members to each other, And a second connecting joint portion provided at the first connecting joint portion for connecting the slant members of the steel pipe to each other, wherein the first connecting joint portion includes a first connecting plate provided on one side of the steel pipe inclined member and a second connecting plate provided on the other side, Wherein the second connecting joint includes a two-stage connecting plate provided on one side of the slant of the steel pipe, and a one-stage connecting plate provided on the other side of the slant, and the one-stage connecting plate of the first connecting joint of the steel pipe- And the first connection plate of the second connection joint of the steel pipe inclined material is inserted between the two connection plates of the second connection joint of the adjacent steel pipe inclined material, And can be coupled with the bolts.

In addition, side faces and bottom faces of the concrete lower flange can be wrapped in a U shape by a steel material.

The steel composite PSC truss U girder continuous bridge according to another exemplary embodiment of the present invention includes a concrete lower flange, a pair of concrete upper flanges, and a pair of truss belts connecting the both sides of the concrete lower flange and a pair of concrete upper flanges, U girder installed between the bridge and the pier and an inner bridge U girder installed between the bridge and the pier; An alternate-point concrete block-wall block connecting a concrete lower flange, a pair of concrete upper flanges, and a pair of truss belts at a connection point between the outer end of the outer span U-girder and the U- Secondary concrete bulkhead block; A precast half deck installed on the upper concrete flange of the inner side intergranular U girder; First and second internal tension PS steel wires installed inside the concrete lower flange of each of the above-described inner and intermediate diameter U girders; First and second external tension PS steel wires installed in the inner space portion of the inner side inter-girder girder; First and second internal tension PS steel wire fixing blocks and a fixing unit for respectively fixing the first and second internal tension PS steel wires; And a first and a second outer tension PS steel wire fixing block for fixing the first and second outer tension PS steel wires, respectively, and a fusing unit, wherein the first inner tension PS steel wire fixing block and the fixing unit are connected to each other, And the second inner tension PS wire fixing block and the fixing portion are installed on the concrete lower flange and spaced inward from both ends of the outer and inner side interspacing girders, And the fusing unit are respectively installed on both upper sides of the outer end of the outer span U-girder and on the upper both sides of the connection point between the outer and inner radii U-shaped girders, and the second outer torsion PS wire fixing block and the fusing unit are located on the outer side Wherein the first and second inner tension PS strands are tensioned in a girder fabrication zone and the first outer tension PS strands are disposed in a lower portion of the first outer tension PS strand fixing block and the fusing unit, And the second outer tension PS steel wire is laid on the upper part of the precast half deck, and then the second outer tension PS steel wire is laid on both ends And the girders between the outer span U and the girders of the outer span of the U spindle.

A pair of outer saddle blocks joined to the concrete lower flange at the inner side of the second inner tension PS girder fixing block and the inner side of the fixing unit to deflect the second outer tension PS steel wire, respectively; A pair of inner saddle blocks joined to the concrete lower flange at an inner side of the pair of outer saddle blocks to deflect the first outer tension PS steel wire; An outer steel material disposed in contact with the inside of the truss portion from each of the inner and outer saddle blocks to the concrete upper flange; A steel material connecting an upper portion of the outer steel material; And an inner steel sheath for connecting the inner and outer saddle blocks on both sides of the current center of the steel material, wherein the upward force of the first and second outer tension PS steel rods is formed by joining the left and right outer steel strips and the inner steel strips, To the upper portion through the W-shaped support structure.

In addition, the position of the second outer tension PS steel wire in the inner saddle block of the inner sagittal U-shaped girder may be made higher than the position of the first outer tension PS steel wire to balance the moments between the outer span U girder and the inner saddle U- have.

Further, the upper end of the outer flange of the concrete between the outer end of the outer span U-girder and the second inner tension PS wire fixing block and the fusing unit adjacent to the outer end of the outer span U- An external tension PS line fixing block and a fixing unit for management; And a saddle tube for maintenance provided on the inner and outer saddle blocks, wherein, when in use, the outer tension PS wire fixing block for maintenance and the saddle tube for maintenance use a saddle tube for maintenance, The external tension for the connecting maintenance can be more tense with PS liner.

The truss portion may include a plurality of steel pipe slant members having end portions sealed and staggered, a first connecting joining portion provided at both side ends of the steel pipe slant member to connect the steel pipe slant members to each other, And a second connecting joint portion provided at the first connecting joint portion for connecting the slant members of the steel pipe to each other, wherein the first connecting joint portion includes a first connecting plate provided on one side of the steel pipe inclined member and a second connecting plate provided on the other side, Wherein the second connecting joint includes a two-stage connecting plate provided on one side of the slant of the steel pipe, and a one-stage connecting plate provided on the other side of the slant, and the one-stage connecting plate of the first connecting joint of the steel pipe- And the first connection plate of the second connection joint of the steel pipe inclined material is inserted between the two connection plates of the second connection joint of the adjacent steel pipe inclined material, And can be coupled with the bolts.

In addition, side faces and bottom faces of the concrete lower flange can be wrapped in a U shape by a steel material.

A composite composite PSC truss U girder bridge in accordance with another embodiment of the present invention includes a concrete lower flange, a pair of concrete upper flanges, and a pair of trusses connecting a pair of concrete upper flanges with both sides of the concrete lower flange, U girder, including abdomen, with alternating ends, segment U girder, bridge pier provided on bridge pier segment U girder, and span midway segment installed midway between bridge pier and bridge pier U girder; An alternating fulcrum concrete partitioning block connecting the concrete lower flange, a pair of concrete upper flanges, and a pair of truss belts at the outer end of the alternating fulcrum segment U girder and at the center of the bridge pier segment segment U girder, Block concrete block walls; A precast half deck installed on a concrete upper flange of the segment U girder; First, second and third internal tension PS strands installed within the concrete lower flange of the segment U girder; First and second outer tension PS steel wires installed in the inner space of the segment U girder; First, second, and third inner PS PS wire liner fixing blocks and fusers respectively fixing the first, second, and third inner tension PS liner lines; And a first and a second outer tension PS steel wire fixing block for fixing the first and second outer tension PS steel wires, respectively, and the fusing unit, wherein the first inner tension PS steel wire fixing block and the fusing unit are disposed at both ends of the U- Wherein the second internal tensional PS liner fixation block and the fusing section are mounted on the concrete lower flange spaced inwardly from both ends of each segment U girder, Wherein the first outer tension PS liner fixation block and the fusing section are provided on the concrete lower flange on each of the segment U girders for connecting the segment U girders to each other, And the second external tension PS wire fixing block and the fusing unit are installed on both sides of the upper portion and the upper portion of the concrete bridge block, Wherein the first and second inner tension PS strands are tensioned in a girder fabrication zone and the third inner tension PS girder is tensioned in a girder fabrication zone, The PS strand is tensioned by connecting each of the segment U girders to the alternate and pierced segments and then connecting the adjacent segment U girders to each other and the first outer tension PS strand after the tension of the third inner tension PS strand, And the second outer tension PS steel wire is laid on the upper portion of the precast half deck and then the girders between the alternate flank segments U and the girders of both the alternate flank segments at both ends are connected together have.

A second internal tensional PS line fixation block on the alternating fulcrum segment U-girder and an external saddle block joined to the concrete bottom flange within the fusing unit to deflect the second external tensional PS line; A pair of inner saddle blocks joined to the concrete bottom flange between the outer saddle block and the inner end of the alternate flank segment U girder to deflect the first outer tension PS steel wire; A connecting joint concrete block for deflecting the second outer tension PS steel wire on the concrete lower flange at both ends of the pierced portion segment U girder; A pair of inner saddle blocks joined to the concrete lower flange spaced apart from both ends of the span mid segment U girder to bias the first outer tension PS steel wire; An outer steel material disposed in contact with the inside of the truss portion from each of the inner and outer saddle blocks to the concrete upper flange; A steel material connecting an upper portion of the outer steel material; And an inner steel sheath for connecting the inner and outer saddle blocks on both sides of the current center of the steel material, wherein the upward force of the first and second outer tension PS steel rods is formed by joining the left and right outer steel strips and the inner steel strips, And can be supported by the connecting joint concrete block.

Also, an upper end portion of the concrete lower flange between the outer end of the alternating fulcrum segment U-girder and the second inner tensional PS steel wire fixing block and the fusing portion adjacent to the outer end portion of the alternate fulcrum segment U- An outer tension PS wire fixing block and a fixing unit for maintenance on both sides; And a saddle tube for maintenance provided on the inner and outer saddle blocks, wherein, when in use, the outer tension PS wire fixing block for maintenance and the saddle tube for maintenance use a saddle tube for maintenance, You can tie more tightly with an external tension PS liner for maintenance.

The truss portion may include a plurality of steel pipe slant members having end portions sealed and staggered, a first connecting joining portion provided at both side ends of the steel pipe slant member to connect the steel pipe slant members to each other, And a second connecting joint portion provided at the first connecting joint portion for connecting the slant members of the steel pipe to each other, wherein the first connecting joint portion includes a first connecting plate provided on one side of the steel pipe inclined member and a second connecting plate provided on the other side, Wherein the second connecting joint includes a two-stage connecting plate provided on one side of the slant of the steel pipe, and a one-stage connecting plate provided on the other side of the slant, and the one-stage connecting plate of the first connecting joint of the steel pipe- And the first connection plate of the second connection joint of the steel pipe inclined material is inserted between the two connection plates of the second connection joint of the adjacent steel pipe inclined material, And can be coupled with the bolts.

In addition, side faces and bottom faces of the concrete lower flange can be wrapped in a U shape by a steel material.

Through the present invention, the advantages of PSC and steel material can be reduced to a selected girder and the length of the girder can be reduced, and it is possible to construct a truss point portion, a fixing block, a saddle shape, a PC steel wire And the tension method can be improved to increase the efficiency.

Also, compared to the conventional PSC U girder, the weight of the girder can be reduced by reducing the amount of concrete used, and the use of steel can be reduced compared to the steel box girder or the steel U-girder.

In addition, since the weight of the girder is light, it is easy to mount and is less restricted to the terrain condition, and it is possible to provide an effect of improving the workability such as manufacturing and mounting.

In addition, when the prestress is introduced, it is possible to provide an effect of uniformly and efficiently transmitting the upward force to the upper portion of the girder.

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a view showing a state in which a steel composite PSC truss U girder bridge is installed according to an example of the present invention. Fig.
2 is a longitudinal sectional view showing a steel composite PSC truss U girder simple bridge according to an example of the present invention.
3A to 3F are cross-sectional views taken along line AA, BB, CC, DD, EE, and FF of FIG. 2 showing longitudinal cross-sectional views of a steel composite PSC truss U girder bridge in accordance with an example of the present invention.
Fig. 4 is a view showing a bridge installation state of a composite composite PSC truss U girder bridge according to another example of the present invention. Fig.
5 is a vertical sectional view showing a steel composite PSC truss U girder continuous bridge according to another example of the present invention.
6A is a longitudinal sectional view showing an outer span U girder of a composite composite PSC truss U girder continuous girder bridge according to another example of the present invention.
Fig. 6B is a longitudinal sectional view showing an inter-sway U girder in a steel composite PSC truss U girder continuous girder bridge according to another example of the present invention.
7A-7N are cross-sectional views taken along line AA, BB, CC, DD, EE, FF, GG, HH, II, JJ, KK of FIG. 5 showing a longitudinal section view of a composite composite PSC truss U girder bridge according to another example of the present invention. , LL, MM, and NN, respectively.
Fig. 8 is a view showing a bridge installation state of a composite composite PSC truss U girder bridge according to another example of the present invention. Fig.
Fig. 9 is a vertical sectional view showing a steel composite PSC truss U girder continuous bridge according to another example of the present invention. Fig.
10A is a vertical sectional view showing an alternate flank segment U girder of a steel composite PSC truss U girder continuous bridge according to another example of the present invention.
Fig. 10B is a vertical sectional view showing a girder of a bridge pier segment segment of a steel composite PSC truss U girder continuous bridge according to another example of the present invention. Fig.
Fig. 10C is a vertical sectional view showing a girder of a spanwise central segment U of a steel composite PSC truss U girder continuous bridge according to another example of the present invention. Fig.
11A to 11K are cross-sectional views taken along line AA, BB, CC, DD, EE, FF, GG, HH, II, JJ, KK line.
Figs. 12A to 12C are side views, cross-sectional views and perspective views showing trusses of a steel composite PSC truss U girder applied to a steel composite PSC truss U girder bridges and continuous bridges of the present invention.

Hereinafter, some embodiments of the present invention will be described in detail with reference to exemplary drawings. In the drawings, like reference numerals are used to refer to like elements throughout the drawings, even if they are shown in different drawings. In the following description of the embodiments of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the difference that the embodiments of the present invention are not conclusive.

In describing the components of the embodiment of the present invention, terms such as first, second, A, B, (a), and (b) may be used. These terms are intended to distinguish the constituent elements from other constituent elements, and the terms do not limit the nature, order or order of the constituent elements. When a component is described as being "connected", "coupled", or "connected" to another component, the component may be directly connected or connected to the other component, May be "connected "," coupled "or" connected ".

Hereinafter, the construction of a steel composite PSC truss U girder bridge according to an example of the present invention will be described in detail with reference to the drawings.

Fig. 1 is a vertical cross-sectional view showing a composite composite PSC truss U-girder bridges, Fig. 2 is a vertical cross-sectional view showing a composite composite PSC truss U girder bridge, CC, DD, EE, and FF lines.

1 to 3F, a composite composite PSC truss U girder bridge in accordance with an exemplary embodiment of the present invention is characterized in that the U girder 40 is installed between the two alternations 1 in a short span, It may also be provided between the bridge pier 2 (see Fig. 4) and the bridge pier 2 and the bridge pier 2. Fig.

The U girder 40 includes a concrete lower flange 10, a pair of concrete upper flanges 20, a pair of truss belts 20 connecting a pair of concrete upper flanges 20 with both sides of the concrete lower flange 10 30).

A pair of alternate focal point concrete partition blocks 50 connecting the concrete lower flange 10, the pair of concrete upper flanges 20 and the pair of truss portions 30 are provided at both ends of the U girder 40 And a precast half deck 60 is installed on the concrete upper flange 20. [

First and second inner tension PS steel wires W1 and W2 are installed in the concrete lower flange 10 and first and second outer tension PS steel wires W3 and W4 are installed in the inner space portion of the U girder 40. [ do.

The first and second inner tension PS steel wires W1 and W2 are tensioned by installing a precast half deck 60 on the concrete upper flange 20 after the U girder 40 is manufactured in the girder manufacturing site, The load on the U-girder 40, the pre-cast half deck 60 and the slab is taken into account, since the load on the slab is put into consideration.

A first inner tension PS wire fixing block and a fixing portion 71a and a second inner tension PS wire fixing block and a fixing portion 71b are installed to fix the first and second inner tension PS wires W1 and W2, The first internal tension PS wire fixing block and the fixing portion 71a are installed at both ends of the U girder 40 and the second internal tension PS wire fixing block and the fixing portion 71b are provided at both ends of the U girder 40 Spaced at both ends and mounted on the concrete lower flange 10. [

On the other hand, the first and second outer tension PS steel wires W3 and W4 are strained after the U-girder 40 is mounted on the alternating (1) or pier 2 and the slab is placed on top of the precast half deck 60 , And live load.

A first outer tension PS steel wire fixing block and a fixing portion 73a and a second outer tension PS steel wire fixing block and a fixing portion 73b are installed to fix the first and second outer tension PS steel wires W3 and W4, The first outer tension PS steel wire fixing block and the fixing portion 73a are installed on the alternate end portion concrete partition wall block 50 at both ends of the U girder 40. The second outer tension PS steel wire fixing block and the fixing portion 73a 73b are provided on the alternate-point concrete partition wall block 50 at both ends of the U girder 40 and are installed below the first outer tension PS steel wire fixing block and the fixing portion 73a.

A pair of inner and outer saddle blocks 81 and 82 are provided to deflect the first and second outer tension PS steel wires W3 and W4 and the outer saddle block 82 is connected to a second inner tension PS wire And the inner side saddle block 81 is joined inside the pair of outer side saddle blocks 82 in a pair of symmetrical shapes on both sides of the concrete lower flange 10 inside the fixing block and the fixing part 71b, The inner and outer saddle blocks 81 and 82 are joined to the inner and outer saddle blocks 81 and 82 in a pair of symmetrical shapes on both sides of the inner and outer saddle blocks 10 and 10, , W4 to the U-girder (40).

At this time, the height of the saddle tube for deflecting the PS steel wire provided on the inner and outer saddle blocks 81 and 82 is set at the same height at the lower ends of the inner and outer saddle blocks 81 and 82 at four points, The upward force of the steel wires W3 and W4 is equalized at each point.

The inner and outer saddle blocks 81 and 82 are composed of a steel current 87 and outer and inner steel strips 85 and 86. The outer steel strip 85 is placed in contact with the inside of the truss portion 30 from each of the inner and outer saddle blocks 81 and 82 to the concrete upper flange 20 and the upper portion of the outer steel strip 85 And inner and outer saddle blocks 81 and 82 are connected to the central portion of the steel current sheath 87 and the inner steel sheath 86 to connect the first and second outer tension PS steel wires W3 and W4 The upward force is transmitted to the upper portion through the W-shaped support structure formed by the left and right outer steel sheathing members 85 and the inner steel sheathing members 86 and the first and second outer tension PS The upward force of the steel wires W3 and W4 is most effectively transmitted to the upper portion.

This W-support structure allows the upward force of the first and second outer PS tension wires W3 and W4 to be effectively transmitted to the U girder 40 without the thickness of the truss 30 being increased. Since the truss stomach 30 and the outer steel sheath material 85, the steel material sheath 87, the inner steel sheath material 86 and the concrete lower flange 10 have a truss structure, the first and second outer strap PS liners W3, W4 to the U-girder 40 in a stable manner. This applies equally to the steel composite PSC truss U girder continuous bridge according to another example of the present invention to be described later and the steel composite PSC truss segment U girder continuous bridge according to another example.

In addition, a pair of external tension PS wire fixing blocks for maintenance are provided on the concrete lower flange 10 between the first and second internal tension PS wire fixing blocks and the fixing portions 71a and 71b for maintenance tension when necessary during use. And the saddle tube 74a for maintenance can be installed in the fixing unit 74 and the inner and outer saddle blocks 81 and 82. [

Hereinafter, the construction of the steel composite PSC truss U girder bridge according to another example of the present invention will be described in detail with reference to the drawings.

Fig. 4 is a vertical cross-sectional view showing a composite composite PSC truss U girder bridging bridge, Fig. 5 is a longitudinal section view showing a composite composite PSC truss U girder bridge, Figs. 6a and 6b are cross- 7A to 7N are cross-sectional views taken along line AA, BB, CC, DD, EE, FF, GG, HH, II, JJ, KK, LL, MM and NN in FIG. 5 .

4 to 7n, a composite composite PSC truss U girder bridge according to another embodiment of the present invention includes two outer span U girders 110 installed between alternation 1 and bridge 2, U girder 120 installed between the bridge 2 and the pier 2 is connected and the number of inter-sagittal U girders 120 can be further increased if necessary.

The outer span U girder 110 and the inner intergrowth U girder 120 are respectively connected to a concrete lower flange 10, a pair of concrete upper flanges 20, a pair of concrete upper flanges 20 And a pair of truss portions 30 for connecting the truss portions 30 to each other.

The concrete lower flange 10, the pair of concrete upper flanges 20, and the pair of truss belts 20, respectively, at the connection point between the outer end of the outer span U girder 110 and the outer and inner inter- And a concrete bridge partition block 53 connected to the concrete upper part flange 20 of the inner side interliner U and the inner side interliner U A cast half deck 60 is installed.

First and second internal tension PS steel wires W1 and W2 are provided in the concrete lower flange 10 of each of the inter-sideward U girders 110 and 120, The first and second outer tension PS steel wires W3 and W4 are installed in the inner space portion of the main body portion.

The first and second inner tension PS strands W1 and W2 are strained at the girder fabrication site after manufacturing the inner and interdepth side U girders 110 and 120. [ The first and second inner tension PS steel wires W1 and W2 take charge of the inner and interdisk U girder 110 and the precast half deck 60 until the slab is poured.

A first inner tension PS wire fixing block and a fixing portion 71a and a second inner tension PS wire fixing block and a fixing portion 71b are installed to fix the first and second inner tension PS wires W1 and W2, do. The first internal tension PS wire fixing block and the fixing portion 71a are provided at both lower ends of the inner and outer diameter U girders 110 and 120. The second inner tension PS wire fixing block and the fixing portion 71a are provided at both ends, Are spaced inward from both ends of the inter-sidewall U girders 110, 120 and are mounted on the concrete lower flange 10. [

On the other hand, the first outer tension PS steel wire W3 is fixed to the alternating (1) or the pier 2 in succession to the inter-sideward U girders 110 and 120, and the construction and operation of the concrete bridge block 53 After installing the permanent co-ordinate system, the U-girder 110 and 120 adjacent to the inter-sided inter-girder girders 110 and 120 are connected to each other, and then the slab load is applied.

The second outer tension PS steel wire W4 is formed by laying a slab on top of the precast half deck 60 and then connecting both outer girder U girders 110 and inner girder U girders 120 therebetween, They are nervous, and are in charge of the live load.

A first outer tension PS steel wire fixing block and a fixing portion 73a and a second outer tension PS steel wire fixing block and a fixing portion 73b are installed to fix the first and second outer tension PS steel wires W3 and W4, do. The first outer tension PS steel wire fixing block and the fixing portion 73a are respectively installed on the outer upper end of the outer span U girder 110 and the upper portions on both sides of the connection point between the outer and inner radially between U girders 110 and 120, The two outer tension PS steel wire fixation block and fusing portion 73b are located on the outer end of the outer span U girder 110 and below the first outer tension PS steel wire fixation block and fusing portion 73a.

The first and second outer tension PS steel wires W3 and W4 are joined together with the bridgehead concrete block walls 53 And inter-sideward U girders 110 and 120 are connected in series.

For example, in the case of the first outer torsion PS steel wire W3, starting from the upper end of the outer end of the left outer span U girder 110, the direction is switched by a pair of inner saddle blocks 81, And extends to the upper portion of the inter-sideline U girder 120. [ The first outer tension PS steel wire W3 installed on the inner sagittal U-girder 120 starts from above the inner point (pier) of the outer span U girder 110 on one side and is paired with a pair of inner sagittal U- To the upper portion of the inner span of the outer span U-girder 110 on the other side via the inner saddle block 81 of Fig. That is, the first outer tension PS steel wire W3 is mainly installed on one U-girder, and its end extends to the adjacent U-girder, so that the U-girder is continuously connected to each other so as to behave as a continuous beam.

The second outer tension PS steel wire W4 is installed between the second outer tension PS steel wire fixing block and the fixing portion 73b provided outside the upper portions of both outer span U girder 110 and is connected to both outer span U girder 110, And the inter-sideward U girder 120 therebetween are connected and tightened together. That is, the second outer tension PS steel wire W4 starts from the second outer tension PS steel wire fixing block and the fixing portion 73b provided outside the upper outer side of the left outer span U girder 110, U girder blocks 82 and 82 and a pair of outer saddle blocks 82 and inner and outer intergranular U girders 110 and 120 of the inter-saddle U girder 120, A second outer tension PS wire fixing block provided on the upper outer side of the upper and right outer span U girder 110, and a fixing portion 73b.

At this time, first and second outer tension PS steel wires W3 and W4 are installed at the same height at the center portion of the outer span U girder 110 and at the center portion of the inner arc gap U girder 120, (W4) is higher than the height of the first external tension PS wire (W3). This is because the eccentric distance of the second outer-tension PS steel wire W4 in the inter-sagittal U-girder 120 is set to be smaller than the eccentric distance of the outer-span U-girder 110 so that the bending moment of the inner sagittal U- U < / RTI > girder 110. < RTI ID =

In addition, a pair of inner and outer saddle blocks 81 and 82 are provided for deflecting the first and second outer tension PS steel wires W3 and W4. The outer saddle block 82 is provided with an inner inter- The inner saddle block 81 is joined in a pair of symmetrical shapes to the concrete lower flange 10 at the inside of the second inner tension PS wire fixing block and the fixing portion 71b of each of the inner saddle blocks 110 and 120, U girder 110 and 120 in a pair of symmetrical shapes on both sides of the concrete lower flange 10 from the inside of a pair of outer saddle blocks 82. The inner and outer saddle blocks 81 and 82 are connected to the upward and downward forces of the first and second outer tension PS steel wires W3 and W4 applied to the inner and outer saddle blocks 81 and 82, , 120).

The height of the saddle tube for deflecting the PS steel wire provided on the inner and outer saddle blocks 81 and 82 in the outer span U girder 110 is set at the same height at the lower ends of the inner and outer saddle blocks 81 and 82 at all four points Which allows the upward force of the first and second outer tension PS wires W3 and W4 to be transmitted equally at each point. The height of the saddle tube for deflection of the PS steel wire in the inner and outer saddle blocks 81 and 82 in the inner sagittal U girder 120 is set such that the moment of the inner sagittal U girder 120 is smaller than the moment of the outer span U girder 110 The height of the saddle tube for deflecting the PS steel wire in the inner saddle block 81 and the saddle tube for deflecting the PS steel wire in the outer saddle block 82 should be different. That is, the position of the saddle tube for deflecting the PS steel wire in the outer saddle block 82 is made higher than the position of the saddle tube for deflecting the PS steel wire in the inner saddle block 81, so that the second outer strained PS steel wire W4 And the moment balance between the inter-sideward U girders 110 and 120 is adjusted.

The inner and outer saddle blocks 81 and 82 are composed of a steel current 87 and outer and inner steel strips 85 and 86. The outer steel strip 85 is placed in contact with the inside of the truss portion 30 from each of the inner and outer saddle blocks 81 and 82 to the concrete upper flange 20 and the upper portion of the outer steel strip 85 The inner and outer saddle blocks 81 and 82 are connected to the central portion of the steel material current 87 and the inner and outer steel saddle joints 86 to connect the first and second outer tension PS steel wires W3 and W4 Is supported by the left and right outer steel sheathing members 85 and the inner steel sheathing member 86 to form upper and lower outer side saddle blocks 81 and 82, The upward force of the tension PS wires W3 and W4 is most effectively transmitted to the upper portion.

In addition, for maintenance tension when necessary during use, the outer end of the outer span U-girder 110 and the upper portion of the concrete lower flange 10 between the second inner tension PS wire fixing block and the fixing portion 71b adjacent thereto, The outer tension PS wire fixing block and the fixing portion 74 may be provided on both sides of the connection point of the inner sagittal U girders 110 and 120. In the inner and outer saddle blocks 81 and 82, The saddle tube 74a can be installed. The outer tensional PS girder fixing block for maintenance, the fusing unit 74 and the saddle tube 74a for maintenance are used to connect the outer and inner sideward U girders 110 and 120, Can be more relaxed with external tension PS liner.

Hereinafter, the construction of the steel composite PSC truss U girder continuous bridge according to another example of the present invention will be described in detail with reference to the drawings.

9 is a longitudinal sectional view showing a steel composite PSC truss U girder continuous bridge according to still another example, and Fig. 10A is a cross-sectional view showing a steel composite PSC truss U girder bridge in accordance with still another example, 10c are longitudinal sectional views showing the alternate flank segment U girder, the bridge pier segment segment U girder, and the span center segment segment U girder, respectively. 11A to 11K are cross-sectional views taken along line A-A, B-C, C-D, E-E, F-G, G-H, I-I, J-J and K-K in FIG.

8 to 11K, a steel composite PSC truss U girder continuous bridge according to another example of the present invention includes an alternating fulcrum segment U girder 210, a pier portion segment U girder 220, U girder 230, and each segment is continuously connected.

The alternate flank segment U girder 210 is installed at one end in alternation 1 and the piercing flank segment U girder 220 is installed on the pier 2 and the span center segment U girder 230 is connected to the pier 2) and the bridge pier 2.

The alternate flank segment U-girder 210 and the pierced flank segment U-girder 220 and the spanwise middle segment U-girder 230 are each comprised of a concrete lower flange 10, a pair of concrete upper flanges 20, And a pair of truss portions 30 for connecting the pair of concrete upper flanges 20 to both sides of the concrete upper flange 20.

The concrete lower flange 10 and the pair of concrete upper flanges 20 and the pair of truss belts 30 at the outer end of the alternate flank segment U girder 210 and at the center of the piercing flank segment U girder 220 And a concrete bridge partition block 53 is provided on the concrete upper part flange 20 of each of the segment U girders 210, 220 and 230. The pre-cast half part 50, A deck 60 is installed.

First, second and third internal tension PS steel wires W1, W2 and W5 are installed in the concrete lower flange 10 of each segment U girder 210, 220 and 230, and each segment U girder 210, 220, 230 are provided with first and second outer tension PS steel wires W3, W4.

The first and second inner tension PS steel wires W1 and W2 are tensioned inside the concrete lower flange 10 after being manufactured at the girder manufacturing site. And supports the loads of the segment U girders 210, 220, and 230 and the precast half deck 60 until the slab is placed. The third internal tension PS wire W5 connects each segment U girder 210, 220 and 230 to alternating segment 1 and bridge bridge 2 and then connects adjacent segment U girders 210, I am nervous. Of course, in order to install each segment U girder 210, 220, 230, a temporary bridge pierce (see FIG. 8) as well as alternation 1 and bridge 2 are used.

A first inner tension PS wire fixing block and a fixing portion 71a, a second inner tension PS wire fixing block, and a fixing portion (not shown) for fixing the first, second, and third inner tension PS wires W1, W2, 71b, a third internal tension PS wire fixing block, and a fixing portion 71c. The first internal tension PS wire fixing block and the fixing portion 71a are installed at the lower ends of both ends of the segment U girders 210, 220 and 230. The second internal tension PS wire fixing block and the fixing portion 71b are installed at the respective Are spaced inwardly from both ends of the segment U girders 210, 220, 230 and are installed on the concrete lower flange 10. The third internal tension PS wire fixing block and the fusing portion 71c are for connecting the segment U girders 210, 220 and 230 to each other and are connected to the concrete lower portions of the connection points of the segment U girders 210, Is installed on the flange (10).

On the other hand, the first outer tension PS wire W3 is tensioned by connecting neighboring segment U girders 210, 220 and 230 after the tension of the third inner tension PS wire W5, W3) is responsible for the continuous connection of the segments U, 210, 220, 230 and the slab load of the segment U girders 210, 220, 230 before placing the slab after installing the permanent co-ordinate apparatus at the neighboring pier 2.

The second external tension PS steel wire W4 is constructed by placing the slab on top of the precast half deck 60 and then connecting both the alternating fulcrum segment U girder 210 and the segment U girders 220 and 230 therebetween Batch tension.

A first outer tension PS steel wire fixing block and a fixing portion 73a and a second outer tension PS steel wire fixing block and a fixing portion 73b are installed to fix the first and second outer tension PS steel wires W3 and W4, do. The first outer tension PS liner fixation block and fixture 73a are installed on both the upper outer side of the alternate flank segment U girder 210 and the upper portion of the pierced flank concrete block 53, The fusing block and fusing portion 73b are located on the upper outer side of the alternate flank segment U girder 210 and below the first outer torsion PS liner fusing block and fusing portion 73a.

The third inner tension PS wire W5 and the first and second outer tension PS wires W3 and W4 connect the segment U girders 210, 220 and 230 in succession.

The third inner tension PS wire W5 is connected to the third inner tension PS wire fixing block provided on each segment U girders 210, 220 and 230 and to the adjacent segment U girders 210, 220 and 230 in the fixing portion 71c. To the third internal tension PS wire fixing block and the fixing portion 71c provided at the fixing portion 71c. The first outer tension PS wire W3 is connected to the first outer tension PS wire fixing block provided in the alternate flank segment U girder 210 and to the first outer tension PS wire fixing block One outer tension PS wire fixation block and fixture 73a are tied up and another first outer tension PS wire W3 is installed on the first outer tension PS wire fixation block And from the fixing portion 73a to the first outer tension PS wire fixing block and the fixing portion 73a of the other pier portion segment U girder 220 through the adjacent span center segment U girder 230 and tightened. The third inner tension PS wire W5 and the first outer tension PS wire W3 are tensioned in span units by connecting the adjacent segment U girders to each other.

And the second outer tension PS steel wire W4 is installed in a second outer tension PS steel wire fixing block and a fixing portion 73b provided outside the upper portion of both the alternate flank segment U girder 210, (210) and the segment U girders (220, 230) therebetween to collectively tighten.

In addition, inner and outer saddle blocks 81 and 82 are provided for deflecting the first and second outer tension PS strands, the outer saddle block 82 having a second inner tension PS And is joined to the concrete lower flange 10 inside the steel wire fixing block and the fixing portion 71b. The medial saddle block 81 is joined in a pair of symmetrical shapes to the concrete bottom flange 10 between the lateral saddle block 82 and the medial end in the alternate flank segment U girder 210, (230) are spaced apart at both ends and joined to the concrete lower flange (10) in a pair of symmetrical shapes. The inner and outer saddle blocks 81 and 82 are used to move the upward and upward force of the first and second outer tension PS steel wires W3 and W4 applied to the inner and outer saddle blocks 81 and 82 to the segment U girders 210 and 220 , 230). In the bridge pier segment segment U girder 220, the jointed concrete block 89 provided on the concrete lower flange 10 at both ends is formed by the adjacent alternate fulcrum segment U girder 210 or span center segment segment U girder 230, Deflects the second external tensile PS wire W4 together with the jointed concrete block 89 of the second external tension PS.

The height of the saddle tube for deflection of the PS steel wire provided on the inner saddle block 81 of the inner and outer saddle blocks 81 and 82 and the span intermediate segment girder 230 of the alternate flank segment U- Both of the inner and outer saddle blocks 81 and 82 should be installed at the same height so that the upward force of the first and second outer tension PS wires W3 and W4 can be uniformly transmitted at each point.

The inner and outer saddle blocks 81 and 82 are composed of a steel current 87 and outer and inner steel strips 85 and 86. The outer steel strip 85 is placed in contact with the inside of the truss portion 30 from each of the inner and outer saddle blocks 81 and 82 to the concrete upper flange 20 and the upper portion of the outer steel strip 85 The inner and outer saddle blocks 81 and 82 are connected to the central portion of the steel material current 87 and the inner and outer steel saddle joints 86 to connect the first and second outer tension PS steel wires W3 and W4 Is transmitted to the upper portion through the W-shaped support structure formed by the left and right outer steel sheathing members 85 and the inner steel sheathing members 86. The upward and downward forces acting on the outer and inner saddle blocks 81 and 82 The upward force of the tension PS wires W3 and W4 is most effective and evenly transmitted to the upper portion. Also, the upward force of the first and second external tension PS steel wires W3 and W4 is also supported by the jointed concrete block 89.

The upper end of the concrete lower flange 10 between the outer end of the alternating fulcrum segment U girder 210 and the second inner tensional PS liner fusing block and fusing portion 71b adjacent to the outer end of the alternating fulcrum segment U girder 210, And an external tension PS wire fixing block and a fusing unit 74 for maintenance on both sides of the upper portion of the concrete bridge partition block 53 of the segment U girders 210, 220 and 230, A saddle tube 74a for maintenance may be provided in the saddle blocks 81, The outer segment of the segment U-girders 210, 220 and 230 are connected to each other during use by using the outer tension PS line fixing block for maintenance and the fusing unit 74 and the saddle tube 74a for maintenance, Tension can be more tense with PS liner.

Hereinafter, the abdomen structure of the steel composite PSC truss U girder of the examples of the present invention will be described in detail with reference to the drawings.

12A to 12C are perspective views showing a side view, a cross-sectional view and a truss portion showing a steel composite PSC truss U girder applied to a steel composite PSC truss U girder simple bridge and a continuous bridge.

12A to 12C, a truss part 30 to be applied to the steel composite PSC truss U girder bridges and continuous bridges of the present invention includes a steel pipe inclined material 31, a first connecting joint 33, And the first and second connecting joints 33 and 37 of the truss portion 30 are embedded in the concrete lower flange and the upper flanges 10 and 20 so as to engage with each other.

A first connecting joint portion (33) is provided at both side ends of the steel pipe inclined material (31) and a second connecting portion (33) is provided at both end sides of the steel pipe inclined material (31) A joining portion 37 is provided to connect the steel pipe inclination members 31 to each other.

The first connection joint portion 33 is provided on the end portion of the steel pipe inclination member 31 in the axial direction and is provided with a first connection plate 34 at one side and a second connection plate 35 at the other side, The one-end connecting plate 34 of the joining portion 33 is inserted between the two-step connecting plates 35 of the first connecting joining portion 33 of the adjacent steel pipe inclining member 31 and is coupled by bolt or welding.

The second connection joint portion 37 is provided on a side surface of the end portion of the steel pipe inclination member 31 and is provided at one side thereof (the side where the first connection plate 34 of the first connection joint portion 33 is provided) And the first connecting plate 38 of the second connecting joining portion 37 is provided on the other side of the second connecting joining portion 37 of the adjacent steel pipe inclining member 31 And is inserted between the connecting plates 39 and joined by bolts, welding or the like.

In the case of a girder, various loads such as a wind load or an earthquake load act in addition to a vertical load or a horizontal load due to a dead load or a live load, and the load is applied to the connection between the truss portion 30 and the concrete lower flange, There is a problem in the part.

The first connecting joint portion 33 and the second connecting joint portion 37 of the steel pipe inclined material 31 are coupled so that they do not move relative to each other and the first and second connecting joint portions 33 and 37 The concrete lower flange and the upper flange 10 and 20 are attached to the concrete lower flange and the upper flanges 10 and 20 so that the truss abdomen 30 and the concrete lower flange 10 and the upper flanges 10 and 20 are attached to each other against the externally applied vertical load, horizontal load, torsional load, Combine the liver firmly. The bolts that engage the first and second connecting joints 33 and 37 further enhance the coupling and may further include additional bolts on the sides of the first connecting joint 33 and the second connecting joint 37, The joint between the truss portion 30 and the concrete lower flange and the upper flanges 10 and 20 may be further strengthened by providing a pre-heat insulating solution (not shown) by welding or the like.

On the other hand, as shown in FIG. 12B, the structure of the concrete lower flange 10 may be a structure in which a side face and a lower face of the concrete lower flange 10 are surrounded by a steel material in a U-shape.

As the concrete lower flange 10 is wrapped with a U-shaped steel, it is not only beautiful in appearance like a steel box, but also requires a long span and a low profile structure. The construction cost can be reduced and the concrete of the concrete lower flange 10 is surrounded and confined by the U-shaped steel material, so that the strength of the concrete of the concrete lower flange 10 is increased. The durability of the concrete lower flange 10 is increased.

Since the U-shaped steel material composing the concrete lower flange 10 also serves as a formwork of the concrete lower flange 10, it is possible to easily construct the concrete lower flange 10 without using a separate formwork in the construction site, When a long span girder is applied, a girder consisting of only steel which does not have concrete poured into the concrete lower flange 10 is mounted on the alternating (1) or pier (2), and concrete is placed on the concrete lower flange (10) It is also possible to apply a construction method which is tense with a steel wire. In this case, because the weight of the girder is small, it is very easy to install and can easily be installed even in the case of a long-haul. Therefore, after the concrete in the concrete lower flange 10 is preliminarily laid, it is mounted on the alternation 1 or the pier 2. Alternatively, the girder is first placed on the alternation 1 or the pier 2. Then, It is possible to selectively apply the method of pouring the concrete part according to the site conditions.

While the present invention has been described in connection with what is presently considered to be the most practical and preferred embodiment, it is to be understood that the invention is not limited to the disclosed embodiments. That is, within the scope of the present invention, all of the components may be selectively coupled to one or more of them. Furthermore, the terms "comprises", "comprising", or "having" described above mean that a component can be implanted unless otherwise specifically stated, But should be construed as including other elements. All terms, including technical and scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs, unless otherwise defined. Commonly used terms, such as predefined terms, should be interpreted to be consistent with the contextual meanings of the related art, and are not to be construed as ideal or overly formal, unless expressly defined to the contrary.

The foregoing description is merely illustrative of the technical idea of the present invention, and various changes and modifications may be made by those skilled in the art without departing from the essential characteristics of the present invention. Therefore, the embodiments disclosed in the present invention are intended to illustrate rather than limit the scope of the present invention, and the scope of the technical idea of the present invention is not limited by these embodiments. The scope of protection of the present invention should be construed according to the following claims, and all technical ideas within the scope of equivalents should be construed as falling within the scope of the present invention.

1: shift
2: Pier
10: Concrete bottom flange
20: Concrete upper flange
30: truss abdomen
31: steel pipe inclined material
33: first connection joint
34: 1-stage connection plate
35: Two-stage connection plate
37: second connection joint
38: 1 stage connection plate
39: Two-stage connection plate
40: U girder
50: Concrete partition block
53: Concrete partition block
60: Precast half deck
71a: first internal tension PS wire fixing block and fixing unit
71b: second internal tension PS wire fixing block and fusing unit
71c: third internal tension PS wire fixing block and fixing unit
73a: first external tension PS wire fixing block and fixing unit
73b: second outer tension PS wire fixing block and fixing unit
74: External tension PS stainless steel fixing block and fixing part for maintenance
74a: Saddle tube for maintenance
81: inner saddle block
82: lateral saddle block
85: outer steel material
86: Inner steel workpiece
87: Steel material current
89: Concrete block of connection joint
110: Outer span U girder
120: Internal side girder U girder
210: Alternating fulcrum segment U girder
220: Bridge pierce segment U girder
230: Span center segment U girder
W1: 1st internal tension PS liner
W2: 2nd internal tension PS liner
W3: 1st outer tension PS liner
W4: 2nd outer tension PS liner
W5: 3rd internal tension PS liner

Claims (14)

A pair of concrete upper flanges 20 and a pair of truss belts 30 connecting a pair of concrete upper flanges 20 with both sides of the concrete lower flange 10 A U-girder 40;
An alternate-point concrete partition wall block 50 connecting the concrete lower flange 10, a pair of concrete upper flanges 20 and a pair of truss portions 30 at both ends of the U-girder 40;
A precast half deck 60 installed on the concrete upper flange 20;
First and second internal tension PS steel wires W1 and W2 installed in the concrete lower flange 10;
First and second outer tension PS steel wires W3 and W4 installed in the inner space of the U girder 40;
A pair of first and second inner tension PS wire fixing blocks and fixing portions 71a and 71b for fixing the first and second inner tension PS wires W1 and W2, respectively; And
And a pair of first and second outer tension PS steel wire fixing blocks and fusers 73a and 73b for fixing the first and second outer tension PS steel wires W3 and W4 respectively,
The first inner tension PS wire fixing block and the fixing portion 71a are installed at both ends of the U girder 40 and the second inner tension PS wire fixing block and the fixing portion 71b are installed at both ends of the U girder 40. [ And is disposed on the concrete lower flange 10,
The first and second outer tension PS wire fixing blocks and fixing portions 73a and 73b are sequentially installed downward from both ends of the U girder 40,
The first and second internal tension PS steel wires W1 and W2 are strained at the girder fabrication site,
The first and second outer tension PS steel wires W3 and W4 are connected to each other by a U-girder 40 in alternation 1 and a steel composite PSC Truss U girder simple bridge.
The method according to claim 1,
A pair of outer saddle blocks 82 joined to the concrete lower flange 10 inside the second inner tension PS wire fixing block and the fixing portion 71b to deflect the second outer tension PS wire W4;
A pair of inner saddle blocks (81) joined to the concrete lower flange (10) inside the pair of outer saddle blocks (82) to deflect the first outer tension PS steel wire (W3);
An outer steel stock material 85 installed in contact with the inner side of the truss portion 30 from each of the inner and outer saddle blocks 81 and 82 to the concrete upper flange 20;
A steel material present 87 connecting the upper portion of the outer steel material 85; And
Further comprising an inner steel sheath (86) connecting the central portion of the steel current sheave (87) with the inner and outer saddle blocks (81, 82) on both sides,
The upward force of the first and second outer tension PS steel wires W3 and W4 is transmitted to the upper portion through the W-shaped support structure by the left and right outer steel sheathing members 85 and the inner steel sheathing members 86, U girder simplicity.
3. The method of claim 2,
A pair of external tension PS steel wire fixing blocks and a fixing section 74 installed on the concrete lower flange 10 between the first and second internal tension PS steel wire fixing blocks and the fixing sections 71a and 71b; And
Further comprising a saddle tube (74a) for maintenance on the inner and outer saddle blocks (81, 82).
A pair of concrete upper flanges 20 and a pair of truss belts 30 connecting a pair of concrete upper flanges 20 with both sides of the concrete lower flange 10 An outer span U girder 110 installed between the alternation 1 and the pier 2 and an inner siderite U girder 120 installed between the pier 2 and the pier 2;
The concrete lower flange 10, the pair of concrete upper flanges 20, and the pair of the inner and lower inter-girder U girders 110, 120 at the connection point between the outer end of the outer span U- An alternate-point concrete block-wall block 50 and a bridge-concrete block-concrete block 53 connecting the truss portion 30;
A precast half deck 60 installed on the concrete upper flange 20 of the inter-sidelobe U girders 110, 120;
First and second internal tension PS steel wires W1 and W2 installed inside the concrete lower flange 10 of each of the inner and outer interdepth U girders 110 and 120;
First and second outer tension PS steel wires W3 and W4 installed in the inner space portions of the inner and outer diameter U girders 110 and 120;
First and second inner tension PS wire fixing blocks and fixing portions 71a and 71b for fixing the first and second inner tension PS wires W1 and W2, respectively; And
A first and a second outer tension PS steel wire fixing block and fixing portions 73a and 73b for fixing the first and second outer tension PS steel wires W3 and W4 respectively,
The first inner tension PS wire fixing block and the fixing portion 71a are installed at both lower ends of the inner and outer barrel U girders 110 and 120, Are spaced inward from both ends of the inter-sidewall U girder (110, 120) and installed on the concrete lower flange (10)
The first outer tension PS wire fixing block and the fixing portion 73a are installed at the upper ends of the outer ends of the outer span U girder 110 and at the upper portions of both sides of the connection point between the outer and inner spacers U and 120. [ The second outer tension PS wire fixing block and the fixing portion 73b are installed on the outer end of the outer span U girder 110 and below the first outer tension PS wire fixing block and the fixing portion 73a And,
The first and second internal tension PS steel wires W1 and W2 are strained at the girder fabrication site,
The first outer tension PS steel wire W3 is formed by successively mounting the outer and inner inter-glassy U girders 110 and 120 to the alternation 1 and the pier 2 and then connecting the outer and inner inter- 110 and 120,
The second outer tension PS steel wire W4 is formed by placing a slab on the precast half deck 60 and then joining all the girders between the outer ends U girders 110 at both ends to form a composite composite PSC truss U girder continuous bridge.
5. The method of claim 4,
The second outer intact PS wire strand W4 is bonded to the concrete lower flange 10 at the inner side of the second inner intact PS wire liner fixing block and the fusing portion 71b of each of the inner and outer interdepth U girders 110 and 120, A pair of outer saddle blocks 82 for deflecting the outer saddle blocks 82;
A pair of inner saddle blocks (81) joined to the concrete lower flange (10) inside the pair of outer saddle blocks (82) to deflect the first outer tension PS steel wire (W3);
An outer steel stock material 85 installed in contact with the inner side of the truss portion 30 from each of the inner and outer saddle blocks 81 and 82 to the concrete upper flange 20;
A steel material present 87 connecting the upper portion of the outer steel material 85; And
Further comprising an inner steel sheath (86) connecting the central portion of the steel current sheave (87) with the inner and outer saddle blocks (81, 82) on both sides,
The upward force of the first and second outer tension PS steel wires W3 and W4 is transmitted to the upper portion through the W-shaped support structure by the left and right outer steel sheathing members 85 and the inner steel sheathing members 86, U girder continuous bridge.
6. The method of claim 5,
The position of the second outer tension PS steel wire W4 in the inner saddle block 81 of the inner sagittal U-shaped girder 120 is made higher than the position of the first outer tension PS steel wire W3, 110) and inner side girder (U) girder (120).
The method according to claim 6,
The upper end of the concrete lower flange 10 between the outer end of the outer span U girder 110 and the second inner tension PS wire fixing block and the fusing portion 71b adjacent to the outer end of the outer span U girder 110, , 120), and a fusing unit (74) for external maintenance; And
Further comprising a maintenance saddle tube (74a) provided on the inner and outer saddle blocks (81, 82)
The outer tension PS line fixing line for maintenance and the saddle tube 74a for maintenance use the outer tension PS line for maintenance to connect the adjacent girders to each other, Composite PSC truss U girder continuous bridge.
A pair of concrete upper flanges 20 and a pair of truss belts 30 connecting a pair of concrete upper flanges 20 with both sides of the concrete lower flange 10 A bridgehead segment U girder 210 which is provided at one end in the alternation 1 and a bridgehead segment U girder 220 which is installed on the bridge bridge 2 and between the bridge bridge 2 and the bridge bridge 2 A middle span segment U girder 230 installed midway between spans of the span;
The concrete lower flange 10, the pair of concrete upper flanges 20, and the pair of trusses 21, 22, 22, and 24 are formed at the outer end of the alternating fulcrum segment U girder 210 and at the center of the bridge pier segment U- An alternate-point concrete block-wall block 50 and a bridge-concrete block-concrete block 53 connecting the abdomen 30;
A precast half deck 60 installed on the concrete upper flange 20 of the segment U girders 210, 220, 230;
First, second and third internal tension PS steel wires W1, W2 and W5 installed inside the concrete lower flange 10 of the segment U girders 210, 220 and 230;
First and second outer tension PS steel wires W3 and W4 installed in the inner space of the segment U girders 210, 220 and 230;
First, second and third inner PS PS wire fixing blocks and fusers 71a, 71b and 71c for fixing the first, second and third inner tension PS steel wires W1, W2 and W5, respectively; And
A first and a second outer tension PS wire fixing block and fusers 73a and 73b for fixing the first and second outer tension PS wires W3 and W4 respectively,
The first internal tension PS wire fixing block and the fixing portion 71a are installed at the lower ends of both ends of the segment U girders 210, 220 and 230, and the second internal tension PS wire fixing block and the fixing portion 71a Are installed on the concrete lower flange 10 spaced inward from both ends of the segment U girders 210, 220 and 230 and the third internal tension PS wire fixing block and the fixing portion 71c 220 and 230 connected to each of the segment U girders 210, 220 and 230 and installed on concrete lower flanges 10 at both connection points of the U girders 210, 220 and 230,
The first outer tension PS steel wire fixing block and the fixing portion 73a are installed on the upper outer side of the alternate flank segment U girder 210 and on both sides of the upper portion of the pier portion second concrete block 53, The outer tension PS steel wire fixing block and the fixing portion 73b are installed on the upper outer side of the alternate flank segment U girder 210 and below the first outer tension PS steel wire fixing block and fixing portion 73a,
The first and second internal tension PS steel wires W1 and W2 are strained at the girder fabrication site,
The third internally tensioned PS steel wire W5 passes the segment U girders 210, 220 and 230 to the alternating segment 1 and the bridge bridge 2 and then the adjacent segment U girders 210, 220 and 230 ),
The first outer tension PS wire W3 is tensioned by connecting the adjacent segment U girders 210, 220 and 230 after the third inner tension PS wire W5 is tensed,
The second outer tension PS steel wire W4 is formed by placing a slab on top of the precast half deck 60 and then joining all the girders between the alternate flank segment U girders 210 at both ends to form a composite steel composite PSC truss U girder continuous bridge.
9. The method of claim 8,
A second inner tension PS wire fixing block on the alternate flank segment U girder 210 and an inner side of the fixing portion 71b are joined to the concrete lower flange 10 to deflect the second outer tension PS wire W4 An outer saddle block 82;
Between the outer saddle block 82 and the inner end of the alternating fulcrum segment U girder 210 to form a pair of inner saddles 242 which are joined to the concrete lower flange 10 to deflect the first outer tension PS steel wire W3, Block 81;
A connecting joint concrete block 89 for deflecting the second outer tension PS steel wire W4 on the concrete lower flange 10 at both ends of the pierced portion segment U girder 220;
A pair of inner saddle blocks 81 joined to the concrete lower flange 10 spaced from both ends of the span center segment girder 230 to deflect the first outer tension PS steel wire W3;
An outer steel stock material 85 installed in contact with the inner side of the truss portion 30 from each of the inner and outer saddle blocks 81 and 82 to the concrete upper flange 20;
A steel material present 87 connecting the upper portion of the outer steel material 85; And
Further comprising an inner steel sheath (86) connecting the central portion of the steel current sheave (87) with the inner and outer saddle blocks (81, 82) on both sides,
The upward force of the first and second outer tension PS steel wires W3 and W4 is transmitted to the W joint support structure formed by the left and right outer steel sheathing members 85 and the inner steel sheathing members 86 and the connecting joint concrete block 89 Supported by steel composite PSC truss U girder continuous bridge.
The method of claim 9, wherein
An upper portion of the concrete lower flange 10 between the outer end of the alternating fulcrum segment U girder 210 and the second inner tensional PS strand fusing block and fusing portion 71b adjacent to the outer end portion of the alternating fulcrum segment U girder 210, 220) for external maintenance of the pivot point of the concrete pillar block (53) and the fusing unit (74); And
Further comprising a maintenance saddle tube (74a) provided on the inner and outer saddle blocks (81, 82)
If necessary, the outer tension PS line fixing block for maintenance and the saddle tube 74a for maintenance use a saddle tube 74a for maintenance to connect the neighboring girders to the outer tension PS line for maintenance, Composite PSC truss U girder continuous bridge.
4. The method according to any one of claims 1 to 3,
The truss portion 30 includes a plurality of steel pipe slant members 31 each having a closed end and arranged in a staggered fashion and a plurality of steel pipe slant members 31 provided at both side ends of the steel pipe slant member 31 for connecting the steel pipe slant members 31 to each other And a second connection joining portion 37 provided at both ends of the steel pipe inclination member 31 and connecting the steel pipe inclination members 31 to each other,
The first connection joint 33 includes a first connection plate 34 provided at one side of the steel pipe inclined material 31 and a second connection plate 35 provided at the other side,
The second connection joint 37 includes a two-stage connection plate 39 provided at one side of the steel pipe slant 31 and a one-stage connection plate 38 provided at the other side,
The one-end connection plate 34 of the first connection joint 33 of the steel pipe inclination member 31 is inserted between the two-step connection plates 35 of the first connection joint 33 of the adjacent steel pipe inclination member 31 And is coupled with a bolt,
The one-end connection plate 38 of the second connection joint 37 of the steel pipe inclination member 31 is inserted between the two-step connection plates 39 of the second connection joining portion 37 of the adjacent steel pipe inclination member 31 Steel composite PSC truss U-girder bridges joined by bolts.
12. The method of claim 11,
A composite composite PSC truss U-girder bridge with U-shaped side and bottom surfaces of the concrete lower flange 10.
11. The method according to any one of claims 4 to 10,
The truss portion 30 includes a plurality of steel pipe slant members 31 each having a closed end and arranged in a staggered fashion and a plurality of steel pipe slant members 31 provided at both side ends of the steel pipe slant member 31 for connecting the steel pipe slant members 31 to each other And a second connection joining portion 37 provided at both ends of the steel pipe inclination member 31 and connecting the steel pipe inclination members 31 to each other,
The first connection joint 33 includes a first connection plate 34 provided at one side of the steel pipe inclined material 31 and a second connection plate 35 provided at the other side,
The second connection joint 37 includes a two-stage connection plate 39 provided at one side of the steel pipe slant 31 and a one-stage connection plate 38 provided at the other side,
The one-end connection plate 34 of the first connection joint 33 of the steel pipe inclination member 31 is inserted between the two-step connection plates 35 of the first connection joint 33 of the adjacent steel pipe inclination member 31 And is coupled with a bolt,
The one-end connection plate 38 of the second connection joint 37 of the steel pipe inclination member 31 is inserted between the two-step connection plates 39 of the second connection joining portion 37 of the adjacent steel pipe inclination member 31 Steel composite PSC truss U girder bridges joined by bolts.
14. The method of claim 13,
A composite composite PSC truss U girder bridging girder which surrounds the sides and bottom surfaces of the concrete lower flange 10 in a U shape.

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