KR102035492B1 - Semi cable stayed bridge structure - Google Patents

Abstract

The present invention provides a semi cable-stayed girder bridge structure. According to the present invention, a tower is constructed to be separated from a pier. A column unit segment and a saddle unit segment are individually manufactured. So, constructability and quality of the tower are improved. Moreover, the tower and a girder are composed, and an operation structure is formed by integrated composition of the tower and the girder. So, the semi cable-stayed girder bridge structure can lower the height of the tower and provide a longer span at the same time. The semi cable-stayed girder bridge structure includes: the pier; the girder installed on the upper side of the pier in a longitudinal direction which is an axial direction; the tower installed on the upper side of the pier; a bottom slab installed on the upper side of the girder; and inclined cables fixing the girder to the tower. A lower end of the tower is integrally connected to the side of the girder. At the same time, the lower end of the tower is separated from the pier on the lower side. So, the lower end of the tower has the same operational structure as that of the girder.

Description

Semi cable stayed bridge structure

The present invention relates to a structure of a semi cable-stayed bridge, and more particularly, to a semi cable-stayed bridge structure that can be constructed at an economical cost even in a small and medium span.

The cable-stayed bridge is a structure in which the cable-bearing cable including the backstay cable bears the dead weight, the live load, and all other loads, and the span length is determined by the height of the pylon and the number of the cable-stayed cable. This cable-stayed bridge is a construction method applied to ultra long span bridges, and it is exceptionally applied when long spans such as seas, valleys, and rivers are required along with suspension bridges and arch bridges, and is mainly applied to long spans of 300 to 600m or more. The main disadvantage of the cable-stayed bridge is that the height of the pylon is about 20% of the span length, the cable is expensive, the construction cost is very expensive, and the structure is not commonly used due to special maintenance.

Therefore, it is designed to reduce construction cost and to be applied to medium to long spans. The extra-dose bridge is a bridge where the girder bears the dead load and the cable shares the live load. That is, the Extra-Dose Bridge has been widely used in recent years as a technology to overcome the limitations of the span length or girder height of the existing steel girder or concrete girder by using a cable while using the existing steel girder or concrete girder. Extradoze bridge is mainly used in span section of 50 ~ 200m based on steel girder or concrete girder.

Although the extradose bridge has good applicability in consideration of aesthetics, economics and constructability in middle and long spans, the height of the pylon should be about 10% of the minimum span length. It is not universally used. In other words, since the Extradoze Bridge is large and the main tower is integrated with the piers, most of the bottom of the pylon is constructed in the foundation ground and integrated together with the piers, so that the pylon is the new extension of the main cable. It corresponds. In other words, the pylon must flexibly cope with the construction of the cable, so the height of the pylon should be about 10% of the span length. If the height of the pylon is low, the cable must bear all the amount of expansion of the upper girder, so the cable is very consumed, and the construction is complicated, resulting in an uneconomical structure. Since the construction of the pylons is also carried out with cast-in-place concrete structures, it is a complex construction structure that requires very careful consideration for cost increase, construction quality, and safety management. In addition, the main cable side fixing parts attached to both sides of the girder also form steel or concrete cross beam brackets by attaching steel or concrete cross beams on both sides of the steel or concrete girder, and extend the bottom plate slab on the upper surface of the bottom plate slab. Install the cable anchorage on the side of the steel or concrete crossbeam bracket in the structure to form the main cable side anchorage. Such a structure is fixed and supported by steel or concrete cross beam brackets and an extended bottom plate slab, and is a structure in which a large tension cannot be introduced into the main cable side fixing part. Due to the low resistance of the main cable side fixing part, the load must be distributed and settled in several places, so many side fixing blocks are required. In addition, since only the main cable is settled, when the main cable is replaced, a separate large-scale girder supporting construction vent should be installed at the bottom of the girder. There is a limit to sex, so it is not universalized.

In this regard, the development of a new semi- cable-stayed bridge with a new structure, which can be freely applied to small spans, and has aesthetics, workability, and economics, is required.

Patent 1: Republic of Korea Patent No. 10-0840409

In order to solve the above problems, the main column is to be separated from the piers and constructed, and the pillar segment and the saddle segment, respectively, to provide a semi- cable-stayed bridge structure that can increase the excellent construction and quality of the main column.

In addition, by synthesizing the main tower and the girder, by forming the movable structure in the integrated configuration of the main tower and the girder, it is possible to reduce the height of the main tower and at the same time to provide a semi- cable-stayed bridge structure that can achieve a long span.

Semi cable-stayed bridge structure according to an example of the present invention; A girder installed in a longitudinal direction in an axial direction on an upper side of the pier; A main tower installed above the pier; A bottom plate slab installed on an upper side of the girder; And inclined cables fixing the girder to the main tower, wherein the lower end of the main tower is integrally coupled to the side of the girder and is separated from the lower piers, thereby having the same movable structure as the girder. You can do

The main tower may include pillar segment segments installed in the upper side of the pier and vertically separated from each other, and saddle segment segments installed on the pillar segments, and the pillar segment segments and the pillar segment segments. The saddle segment is coupled to each other, the shear block portion protruding on one side is inserted into the shear pocket portion which is concave on the other side, and is coupled to each other by connecting coupling holes which mutually couple both sides, and at the same time the column segment and the saddle segment The PS steel may be characterized in that the overall tension is coupled.

In addition, the connecting coupler is a side-shaped steel plate is formed so that the concave portion is exposed to the outside, the bottom steel plate is formed to be coupled to one end of the side steel plate and the joint bolt is inserted into the through hole of the bottom steel plate and fastened And, it may be characterized in that it comprises a pair of anchor reinforcing bar is coupled to the concave portion of the side steel plate, the c-shaped shear reinforcing bar is coupled to the convex portion that is the rear surface of the side steel plate.

In addition, the saddle portion segment has an arc-shaped steel bird is installed on the upper surface as a wide fan shape of the upper side, the steel bird is a main installation groove for installing the main cable on the upper surface, for further tension or maintenance It may be characterized by including an auxiliary installation groove for cable installation.

In addition, it includes an arc-shaped inner steel birds are installed on the inside of the saddle portion segment, the inner steel birds may be characterized in that it includes an auxiliary installation for installing additional tension or maintenance cable in the inner side. .

In addition, the coupling of the lower end of the main column and the girder, the protrusion girder coupled to the side of the girder, the connecting joint steel plate is coupled to the end of the protruding girder formed through-holes, embedded in the main tower and protrudes laterally at the same time the connection An anchor bolt is inserted into the through-hole of the bonded steel sheet, it may be characterized in that it comprises a nut fastened to the anchor bolt protruding into the connection bonded steel sheet.

In addition, the coupling of the lower end of the main column and the girder, the protruding girder coupled to the side of the girder, the connection joint reinforcing the side at the same time as being embedded in the main tower, the connection reinforcing bar is installed to be inserted into the interior of the protruding girder After the concrete is poured into the protruding giraffe may be characterized in that it is coupled.

In addition, the coupling of the girder and the cable is coupled to the side of the girder extending in the transverse direction, a pair of outer braces coupled to the side of the girder to converge toward the outer end of the inner brace, the inner brace and one End braces for coupling the pair of outer braces, the fixing member is coupled to the outside of the end brace, characterized in that it comprises a fixing tool formed in the fixing member is inserted into the cable is coupled.

In addition, it may be characterized in that it further comprises an inclined brace connected to both ends of the end brace at the inner end of the inner brace of the girder.

In addition, the main tower may be configured in pairs at both ends of the pier, one in the center of the pier, or three at the center and both ends of the pier.

Through the present invention, the main column is separated from the bridge piers and manufactured by the pillar segment and the saddle segment, respectively, the construction and the excellent quality can be increased.

In addition, by synthesizing and coupling the main column and the girder, the main tower and the girder form a movable structure in an integrated configuration, it is possible to reduce the height of the main tower and at the same time can achieve a long span.

In addition, it is economical to reduce the number of cable installation by improving the coupling structure of the cable and girder to introduce a large tension force.

In addition, by providing an auxiliary installation groove, an auxiliary installation hole, a fixing hole, etc. for the additional tension or maintenance cable installation, maintenance can be easy and cost can be saved.

Figure 1a is a side view showing a structure of a semi- cable-stayed bridge according to an example of the present invention.
1B is a side view showing a state in which internal steel birds are installed as an example of the present invention.
Figure 2a is a plan view showing a bottom plate slab and a steel frame structure of the lower side of the semi- cable-stayed bridge structure according to an example of the present invention.
Figure 2b is a cross-sectional view showing a state of construction using a single pylon of the present invention.
Figure 2c is a cross-sectional view showing a state of construction using the segment pylon of the present invention.
Figure 2d is an enlarged cross-sectional view showing the coupling of the lower end and the girder of the main column of the present invention.
FIG. 2E is a top view of FIG. 2D.
Figure 2f is a cross sectional view showing the portion to which the cable of the present invention is coupled;
FIG. 2G is a detailed plan view of the portion to which the cable of FIG. 2F is coupled; FIG.
FIG. 2H is a longitudinal cross-sectional view and FIG. 2G.
3A to 3H are views when the steel girder of FIGS. 2A to 2H is configured of a concrete girder.
4A is a longitudinal sectional and cross sectional view of a single pylon of the present invention.
4B is a longitudinal sectional view and a cross sectional view of a segment pylon of the present invention.
4C is a partially enlarged view of the column segment of the present invention.
4d is an enlarged view of the saddle portion segment of the present invention.
Figure 4e is an enlarged view of the steel birds of the present invention.
Figure 4f is an enlarged view of the interior steel birds of the present invention installed.
Figure 4g is a detailed view of the coupling coupler of the present invention.
4H is another embodiment of a segment pylon of the present invention.
4I is a state in which the segment pylon is installed in the center of the steel girders of the present invention.
4J is the cable anchoring portion of FIG. 4I.
4K is a state in which the segment pylon is installed in the center of the concrete girder of the present invention.

Hereinafter, some embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the reference numerals to the components of the drawings, the same components are to have the same reference numerals as much as possible even if displayed on different drawings. In addition, in describing the embodiments of the present invention, when it is determined that a detailed description of a related well-known configuration or function interferes with the understanding of the embodiments of the present invention, the detailed description thereof will be omitted.

In addition, 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 only for distinguishing the components from other components, and the nature, order or order of the components are not limited by the terms. If a component is described as being "connected", "coupled" or "connected" to another component, that component may be directly connected or connected to that other component, but there is another component between each component. May be “connected”, “coupled” or “connected”.

Hereinafter, with reference to FIGS. 1 to 4, the structure of a semi cable-stayed bridge according to an example of the present invention will be described in detail.

Semi cable-stayed bridge structure according to an example of the present invention, the bridge (10); A girder 20 installed in a longitudinal direction in an axial direction on an upper side of the pier 10; A main tower 30 installed above the pier 10; Bottom plate slab 40 is installed on the upper side of the girder 20; And inclined cables 50 for fixing the girder 20 to the main tower 30.

This embodiment can be usefully applied to medium and small liver. The main column 30 of the present embodiment may be separated from the pier 10 and simultaneously coupled to the girder 20 to be movable with the girder 20 at the top of the pier 10. That is, the main tower 30 and the girder 20 are integrated and separated from the lower piers 10 so that the height of the main tower 30 can be reduced, so that medium and small span bridges can be economically constructed. The main tower 30 may be constructed as a single main tower 30, or may be constructed by combining and then separating and manufacturing into segments as described below.

Pier 10 is installed on the ground to support the girder 20 and the main column 30, which is the configuration of the bridge, the alternating or other piers may be installed at points spaced apart in the longitudinal direction.

Girder 20 is installed in the longitudinal direction in the axial direction on the upper side of the pier 10, it may be installed over the adjacent alternating or pier. The girder 20 may be provided in plural so as to be spaced apart from each other in the lateral direction from the upper side of the piers 10. In addition, the girder 20 may be installed in a continuous beam form in the longitudinal direction from the upper side of the piers 10, or may be installed in a simple beam form. Horizontal beams may be installed between the girders 20 in the lateral direction to couple the girders 20 to each other. The girder 20 of the present embodiment may use steel, steel composite or iron-based concrete girder 20. Girder supports may be installed between the piers 10 and the girders 20.

The main tower 30 may be installed above the pier 10, and a main tower support may be installed between the main tower 30 and the pier 10. The main tower 30 may include columnar segments 32 and saddle portion segments 34. Pillar segments 32 may be provided in the upper side of the piers 10 and may be composed of a plurality separated in the vertical direction. The column segment segments 32 may be separately manufactured and stacked in a vertical direction. The height of the main column 30 may be adjusted by the number of the column segment segments 32. The pillar segment 32 may be manufactured in a shape of a rectangle or oval of both ends of the rectangle.

Coupling between the column segment segments 32 and the column segment segment 32 and the saddle segment segment 34 is installed so that the shear block portion protruding on one side is fitted to the shear pocket portion concave on the other side, and both sides mutually It may be coupled to each other by the connecting coupling spheres 36. Hereinafter, the column segments 32 and the saddle segment 34 may be referred to simply as segments.

One side of each segment, the upper side or the lower side is formed with a protruding shear block portion, the other side of the lower side or the upper side may be formed a shear pocket portion that is formed concave to accommodate the shear block portion. The shear block portion may be tightly fitted by being formed to correspond to the shear pocket portion well. Then, they may be coupled to each other by coupling couplers 36 that connect the segments to each other. In this embodiment, by constructing the main column 30 through the combination of the plurality of divided column segment 32 and the saddle portion segment 34, the workability can be improved.

The connection coupler 36 is a bottom-shaped steel plate 362 that is formed to expose the concave portion to the outside, the bottom steel plate 364 and through-hole formed by being coupled to one end of the side steel plate 362 and the bottom steel plate ( Joining bolts inserted into the through holes of 364 and a pair of anchor bars 366 coupled to the concave portions of the side steel plates 362 and the convex portions formed on the convex portions that are the rear surfaces of the side steel plates 362. Shear reinforcement 368 may be included.

The side plate 362 may be installed on the outer side while being the upper or lower end of the segment. For example, if the segment is a rectangular cross section it is preferably installed at the corners. That is, the side steel plate 362 may be installed at the corners of the upper end and the lower end of the segment, the concave portion may be exposed to the outside, and the convex portion may be attached to the inner concrete or the like.

Bottom plate 364 may be coupled to the upper or lower end of the side plate (362). That is, bottom plate 364 may be coupled to the upper or lower end of the segment. The joint bolts may be coupled to the adjacent segments by being inserted into the through holes of both bottom steel plates 364 of the adjacent segments.

One side of the anchor reinforcing bar 366 may be coupled to the recessed portion of the side steel plate 362, in detail, by welding or the like on the opposite side to which the bottom steel sheet 364 is coupled. The other side of the anchor reinforcement 366 may be embedded in the concrete of the segment or welded to the steel of the segment. In addition, between the pair of anchor reinforcing bars 366, the main reinforcing bar may be coupled by welding or the like.

The shear reinforcing bars 368 may have a c-shape to be coupled to the convex parts that are rear surfaces of the side steel plates 362. The shear reinforcement 368 may be embedded in the inner concrete of the segment, or may be coupled to the inner reinforcing bar of the segment at the same time.

Wherein the connection coupling sphere column segment 32 and the saddle portion segment 34 when the outer surface is made of a steel composite structure. It may be specified to weld together steels of the outer surface.

Saddle portion segment 34 may have a wide fan shape on the upper side. The saddle portion segment 34 may include arc-shaped steel birds 342 on the upper surface thereof. Steel birds 342 may be formed in the upper surface of the main installation groove for the installation of the main cable 50, and the auxiliary installation groove for installing the additional tension or maintenance cable 50. The main installation groove and the auxiliary installation groove may be formed in an arc shape in the axial direction, the cross section may be hemispherical. That is, after the main cable 50 installed in the axial direction is disposed in an arc shape on the upper side of the main column 30, both ends may be coupled to the girder 20 in the front-rear direction.

The saddle protection cap of the arc shape may be additionally installed on the upper side of the steel birds (342). The saddle protection cap may protect the cable 50 and the steel birds 342 by covering the upper side of the cable (50) installed in the steel birds (342) and steel birds (342).

In addition, an inner steel saddle 344 having an arc shape may be installed inside the saddle portion segment 34. The inner steel birds 344 are for installing the additional tension or maintenance cable 50 to the inside may include an auxiliary installation hole of the shape. Naturally, the main cable may be installed in the auxiliary installation groove or the auxiliary installation port.

The auxiliary installation groove or auxiliary installation port can be easily used when the main cable 50 is replaced. That is, in the case where the main cable 50 is to be replaced by aging, the main cable 50 may be replaced after the temporary cable 50 is installed in the auxiliary installation groove or the auxiliary installation port to support the load. That is, when the main cable is replaced, the replacement work can be performed after installing the cable using the auxiliary installation groove or the auxiliary installation hole without installing a separate large-scale girder support temporary vent under the girder.

The pillar segment 32 and the saddle segment 34 may be tension-coupled as a whole by the PS steel. To this end, the pillar segment 32 and the saddle segment 34 may be provided with a sheath tube for installation of the PS steel along the longitudinal direction in the corner portion.

Both ends of the PS steel may be fixed to the bottom of the column segment 32 and the saddle segment (34). The saddle portion segment 34 may have a protrusion fixing portion for fixing the PS steel. The protrusion fixing part is formed to protrude to the side of the saddle portion segment 34 so that the PS steel material can be tensioned and fixed without being affected by the steel birds 342. The main tower 30 can be structurally increased by the tension of the segments as a whole by the PS steel.

The main tower 30 may be made of steel composite or reinforced concrete, and divided into pillar segment 32 and saddle segment (34), the main tower because it is manufactured at the factory and transported to the site for assembly construction 30) quality can be improved and workability can be increased.

The main tower 30 of the present embodiment may be installed on both sides of the pier 10 in the transverse direction, one installed in the center of the pier 10, or three at both the central portion and both sides of the pier 10. That is, by adjusting the number of the main tower 30 in consideration of the size of the bridge to be installed, etc., it is possible to construct a semi cable-stayed bridge structure having both economic efficiency and workability.

The lower end of the main tower 30 may be combined with the girder 20. The lower end of the main tower 30 and the girder 20 may be coupled to each other, including a protruding crossbeam 60, a connection joint steel plate 62, an anchor bolt, a nut, and the like.

Protruding crossbeam 60 may be a steel structure, or a steel composite structure. That is, the protruding crossbeam 60 is coupled to the side of the girder 20, it may protrude in the transverse direction. An end portion of the protruding crossbeam 60 may be provided with a connection bonding steel plate 62. A plurality of through holes may be formed in the connection joint steel plate 62, and anchor bolts may be inserted and coupled to the through holes. That is, the anchor bolt is embedded or coupled to the main tower 30 and at the same time protrudes to the side, it can be fastened with a nut after being inserted into the through-hole of the connection joint steel plate 62. That is, the nut may be coupled to the anchor bolt protruding inwardly of the connection joint steel plate 62 so that the main tower 30 and the protruding crossbeam 60 may be coupled to each other. In the case of a rigid composite structure, concrete may be poured inside the connection bonding steel plate 62. A reinforcing material may be coupled to the inside of the connection joint steel plate 62 to be embedded in the concrete being poured on the protruding crossbeam 60. The reinforcing material may be a strong coupling of the main tower 30 and the girder 20 by reinforcing the bonding force and shear force of the connection joint steel plate 62 and concrete.

In addition, the protruding street beam 60 may be a concrete structure. In the case of a concrete structure, a connection joint rebar may be installed between the lower end of the main tower 30 and the protruding crossbeam 60. Connection reinforcing bars may be first embedded in the main tower 30 and then made to be exposed to the side and then coupled by placing concrete on the protruding girder 60.

In addition, a bottom plate slab extension portion in which the bottom plate slab 40 extends laterally may be formed at an upper side of a point at which the lower end of the main tower 30 and the protruding crossbeam 60 are coupled. The bottom plate slab extension portion can further solidify the coupling of the main column 30 and the girder 20.

Therefore, the main tower 30 and the girder 20 are integrally formed through the above-described methods to form a movable structure, and thus, the height of the main tower 30 can be lowered and a long span can be achieved. Can be constructed.

The inclined cables 50 may fix the girder 20 to the main column 30. That is, both ends of the cable 50 are coupled to the girder 20 and the center portion is installed to span the steel birds 342 of the main tower 30, thereby fixing the girder 20 to the main tower 30. .

The coupling of the girder 20 and the cable 50, the inner brace 70, the outer brace 72. End brace 74, the fixing member 76, may be made of a fixing device. The inner brace 70 is coupled to the side of the girder 20 may be installed to extend in the transverse direction. That is, the inner brace 70 may extend in the direction perpendicular to the side of the girder 20, that is, in the transverse direction. The inner brace 70 may be formed of concrete or steel.

The outer brace 72 is coupled to the side of the girder 20 is installed to converge toward the outer end of the inner brace 70, it may be installed in pairs. That is, the outer brace 72 is composed of a pair and are coupled to both sides of the inner brace 70 and the side of the girder 20, respectively, can be installed to be inclined to gradually converge toward the end of the inner brace 70. The outer brace 72 may be formed of concrete or steel.

The end brace 74 may couple the outer end of the inner brace 70 and the pair of outer braces 72 to each other. That is, the center portion of the end brace 74 is coupled to the end of the inner brace 70, both ends are coupled to the outer brace 72, thereby the inner brace 70, the outer brace 72, the end brace 74 Can be integrated into one structure. End brace 74 may be formed of concrete or steel.

The fixing member 76 may be coupled to the outside of the end brace 74. That is, the end brace 74 may be coupled inclined in the same direction as the inclination of the cable 50. The fixing unit is installed in the fixing member 76 may be inserted into the cable 50 is coupled.

A maintenance fixing unit may be further formed near the fixing unit. That is, when the additional tension cable 50 or the maintenance cable 50 is installed, the cables 50 are inserted into the maintenance fixing unit and can be easily coupled.

The inner brace 70, the outer brace 72, the end brace 74 and the like can be coupled to each other at the bottom side of the bottom plate slab extension that protrudes outward from the bottom plate slab (40). This coupling structure can reduce the number of installation of the cable 50 by strengthening the coupling structure of the girder 20 and the cable 50.

The inner brace 70 may further include an inclined brace 75 connected to both end portions of the end brace 74 from the inner end. This can significantly increase the stability of the cable 50 coupling by making the girder 20 and the cable 50 coupling structure to the truss structure.

In the above description, all elements constituting the embodiments of the present invention are described as being combined or operating in combination, but the present invention is not necessarily limited to the embodiments. That is, within the scope of the present invention, all of the components may be configured or operated by selectively combining one or more of them. In addition, the terms "comprise", "comprise" or "having" described above mean that the corresponding component may be inherent unless specifically stated otherwise, and thus excludes other components. It should be construed that it may further include other components instead. All terms, including technical and scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art unless otherwise defined. Terms used generally, such as terms defined in a dictionary, should be interpreted to coincide with the contextual meaning of the related art, and shall not be interpreted in an ideal or excessively formal sense unless explicitly defined in the present invention.

The above description is merely illustrative of the technical idea of the present invention, and those skilled in the art to which the present invention pertains may make various modifications and changes without departing from the essential characteristics of the present invention. Therefore, the embodiments disclosed in the present invention are not intended to limit the technical idea of the present invention but to describe the present invention, and the scope of the technical idea of the present invention is not limited by these embodiments. The protection scope of the present invention should be interpreted by the following claims, and all technical ideas within the equivalent scope should be interpreted as being included in the scope of the present invention.

10: pier
20: girder
30: pylon
32: column segment
34: Saddle Segment
342: steelbirds
344: internal steel birds
36: connector
362: side plate
364: bottom plate
366: anchor rebar
368: shear rebar
40: slab slab
50: cable (main cable, maintenance cable, etc.)
60: protrusion crossbeam
62: connection bonded steel sheet
70: inner brace
72: outer brace
74: end brace
75: Sloped Brace
76: fixing member

Claims (10)

delete delete pier; A girder installed in a longitudinal direction in an axial direction on an upper side of the pier; A main tower installed above the pier; A bottom plate slab installed on an upper side of the girder; And inclined cables fixing the girder to the pylon;
The lower end of the main column is integrally coupled to the side of the girder and at the same time separated from the lower piers, and has the same movable structure as the girder,
The main tower includes column segment segments installed in an upper side of the pier and vertically separated, and saddle segment segments installed in upper portions of the column segment segments.
Coupling between the column segment segments and the column segment segment and the saddle segment segment is inserted into a shear pocket portion protruding from one side of the shear block portion protruding from one side, and coupled to each other by connecting couplers coupling the two sides to each other. At the same time, the column segment and the saddle segment are totally tensioned by the PS steel,
The connecting coupler is a side steel plate having an L-shape installed to expose the concave portion to the outside, the bottom steel plate is formed to be coupled to one end of the side steel plate, the joint bolt is inserted into the through hole of the bottom steel plate and fastened; And a pair of anchor reinforcing bars coupled to the concave portion of the side steel plate, and a c-shaped shear reinforcing bar coupled to the convex portion that is the rear surface of the side steel plate. pier; A girder installed in a longitudinal direction in an axial direction on an upper side of the pier; A main tower installed above the pier; A bottom plate slab installed on an upper side of the girder; And inclined cables fixing the girder to the pylon;
The lower end of the main column is integrally coupled to the side of the girder and at the same time separated from the lower piers, and has the same movable structure as the girder,
The main tower includes column segment segments installed in an upper side of the pier and vertically separated, and saddle segment segments installed in upper portions of the column segment segments.
Coupling between the column segment segments and the column segment segment and the saddle segment segment is inserted into a shear pocket portion protruding from one side of the shear block portion protruding from one side, and coupled to each other by connecting couplers coupling the two sides to each other. At the same time, the column segment and the saddle segment are totally tensioned by the PS steel,
The saddle portion segment includes arc-shaped steel birds installed on the upper surface of the broad fan-shaped upper side,
The steel birds are semi-stayed bridge structure, characterized in that it comprises a main installation groove for installing the main cable on the upper surface, and an auxiliary installation groove for installing additional tension or maintenance cable. pier; A girder installed in a longitudinal direction in an axial direction on an upper side of the pier; A main tower installed above the pier; A bottom plate slab installed on an upper side of the girder; And inclined cables fixing the girder to the pylon;
The lower end of the main column is integrally coupled to the side of the girder and at the same time separated from the lower piers, and has the same movable structure as the girder,
The main tower includes column segment segments installed in an upper side of the pier and vertically separated, and saddle segment segments installed in upper portions of the column segment segments.
Coupling between the column segment segments and the column segment segment and the saddle segment segment is inserted into a shear pocket portion protruding on one side and concave on the other side, and coupled to each other by connecting couplers which mutually couple both sides. At the same time, the column segment and the saddle segment are totally tensioned by the PS steel,
Includes arc-shaped inner steel birds installed inside the saddle portion segment,
The internal steel birds are semi-stayed bridge structure, characterized in that it comprises an auxiliary installation for installing additional tension or maintenance cable inside. The method according to any one of claims 3 to 5,
Coupling of the lower end of the main column and the girder is a protruding crossbeam coupled to the side of the girder, the connecting joint steel plate is coupled to the end of the protruding crossbeam, the through-hole is formed, is embedded in the main tower and protrudes laterally at the same time and the connection Semi-screw cable structure comprising an anchor bolt inserted into the through-hole of the steel plate, the nut is fastened to the anchor bolt protruding into the connection bonded steel sheet. The method according to any one of claims 3 to 5,
Combination of the lower end of the main tower and the girder, the protruding girder coupled to the side of the girder, the connection reinforcing bar projected to the side at the same time buried in the main tower, the connecting reinforcing bar is installed to be inserted into the interior of the protruding girder After the semi cable-stayed bridge structure characterized in that the concrete is poured into the protruding giraffe. pier; A girder installed in a longitudinal direction in an axial direction on an upper side of the pier; A main tower installed above the pier; A bottom plate slab installed on an upper side of the girder; And inclined cables fixing the girder to the pylon;
The lower end of the main column is integrally coupled to the side of the girder and at the same time separated from the lower piers, and has the same movable structure as the girder,
The coupling of the girder and the cable is coupled to the side of the girder, the inner brace extending in the transverse direction, the pair of outer brace, coupled to the side of the girder converged toward the outer end of the inner brace, the pair of the inner brace Semi-screw cable structure comprising an end brace for coupling the outer brace of the fixing member, the fixing member is coupled to the outside of the end brace, the fixing member is formed in the fixing member is inserted into the cable. The method according to claim 8,
Semi insulated bridge structure further comprises an inclined brace connected to both ends of the end brace at the inner end of the inner brace of the girder. The method according to any one of claims 3 to 5,
The main tower is composed of a pair at both ends of the pier, one in the center of the pier, or a semi-stayed bridge structure, characterized in that consisting of three at the center and both ends of the pier.

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