KR20090105503A - Joint box girder bridge use the wire to pull for the vertical and horizontal method besides - Google Patents

Abstract

PURPOSE: A joint box girder for bridge using steel wires strained in vertical and horizontal directions and a construction method thereof are provided to achieve rigid bridge deck structure by enhancing subsidence protection on the upper flange part of the girder body. CONSTITUTION: A joint box girder for bridge comprises a plurality of girder bodies(110), a sheath pipe(120), a first PC steel wire(130), and a second PC steel wire(140). The girder body includes a hollow part(111), a side wall(113), upper and lower flanges(115,116), and a second connection hole(117). The sheath pipe is inserted and connected into a first connection hole(114) and the second connection hole. The first PC steel wire is strained and fixed in the sheath pipe fitted to the first connection hole. The second PC steel wire is strained and fixed the sheath pipe fitted to the second connection hole.

Description

Joint box girder bridge use the wire to pull for the vertical and horizontal method besides}

The present invention relates to a box girder for bridges, and more particularly, to carry a lightweight girder body pre-fabricated in a factory at a bridge construction site to a bridge construction site through the tension of the first PC steel wire so that they are the same length as the span distance. By tightly binding each other in the longitudinal direction so that the bridge can be constructed, the internal cores installed permanently in the girder are discharged during the bridge construction to reduce the weight of the girder to ensure the safety of the bridge, as well as the girder bodies that are bound in the longitudinal direction. Tightening and fixing the contact portion of the girder bodies and the second PC steel wire tightly to each other in the lateral direction so that the bridge can be constructed, the stiffness of the upper flange portion and the upper flange portion formed on the girder body Segmental type using steel wires tensioned in the longitudinal and transverse directions to achieve a superior bridge construction It relates to ryangyong box girder and its construction methods.

Generally, a bridge is a structure in which roads, railways, waterways, etc., are constructed to cross natural obstacles or other passages such as rivers, valleys, and straits.

At this time, the bridge top plate and the girder supporting the load of the vehicle and the pedestrian is called the upper structure, the lower structure is a bridge, the shift supporting the upper structure, which serves to transmit the force transmitted from the upper structure to the ground.

Such bridges include a girder bridge that horizontally installs the girder according to its structure, a simple beam bridge that simply supports a mold or a jute truss at both ends, and one mold or jute truss. Continuous bridges supported at the point above the point and the Gerber bridge to fix the structure of the indefinite structure by placing the hinge in a suitable place other than the point of continuous bridge, and the truss bridge using trusses instead of girder Arch bridge using arch or arch truss which support both ends of the curved or curved truss upward to prevent the horizontal movement of both ends, and Rahmen bridge with the main structure of the structure Wow, build a tower on both sides of the cable, tie it up and bridge it from the suspension bridge and in appearance similar to the suspension bridge, Is connected to a cable-stayed bridge is divided into (Cable stayed bridge) that support the mold directly.

Girder bridge is a bridge mainly composed of girders and classified into I type, box type and U type according to the shape of the girder.

At this time, the I type girder is simple to manufacture compared to the box type girder, and because it is a structure made of concrete, there is no concern about corrosion, and thus maintenance is relatively simple. Mainly used for span bridges.

In addition, the box girders are widely used for long span bridges of 50m or more because the shape of the structure is a box-shaped closed end surface and the torsional rigidity is large.

1 is a perspective view showing a conventional box girders.

Referring to FIG. 1, a box-shaped girder 10 has a cross-sectional shape in a box shape, and a space 11 in which a permanent inner core 17 is embedded is formed therein.

At this time, the space 11 is formed by both side walls 13, the lower flange portion 14 and the upper flange portion 15, the upper flange portion 15 is wider than the lower flange portion 14 It is formed.

In addition, the side wall 13 has a PC steel wire 16 therein is built in the form of a parabola in the sheath tube, the tension is fixed after both ends.

However, such a conventional box-type girder has the following problems.

Conventional box girders are difficult to transport because they are themselves heavy objects, and are manufactured and constructed on site. Accordingly, foreign matters are introduced in the manufacturing process, which causes the defect of the product, and the manufacturing process is sensitive to climate change, which causes delays in the manufacturing process and bridge construction depending on the climate.

In addition, since there is no separate connection means for the joint between the girder and the girder, the stiffness of the joint is weak, and the deflection occurs at the joint due to the load generated by the traffic vehicle after a predetermined period of time after construction. There was this.

The present invention has been made in view of the problems of the conventional box-shaped girders, the object of the first PC steel wire to transport the lightweight girder body pre-fabricated in the factory at the bridge construction site to the bridge construction site so that they are the same length as the span distance By allowing the bridge to be constructed by tightly binding each other in the longitudinal direction through tension, the internal core that is permanently installed in the girder can be discharged during the bridge construction to reduce the weight of the girder to secure the safety of the bridge. By making concrete curing process in the factory, it is possible to prevent foreign material inflow during product manufacturing and maintain the high quality of the product, and to use the steel wire which is tensioned in the longitudinal and transverse directions so that it can be easily manufactured regardless of climate change. Provided is a box girder for segmented bridges and its construction method.

Another object of the present invention is to allow the construction of the bridge by tightly binding the girder bodies and the girder bodies which are bound in the longitudinal direction by the first PC steel wire and the second PC steel wire to each other in the transverse direction. Box girder for segmented bridges using longitudinal and lateral tension wires to achieve strong bridge top facilities with excellent deflection stiffness in the contact area between upper flange and upper flange formed on the girder body Provide construction method.

The present invention for achieving the above object

In the box girder for bridges that are connected to the lower facilities of the bridge to be in contact with each other in the longitudinal and transverse directions,

The bridge box girder is

A plurality of bridges are connected in contact with each other by the distance of the bridge, and a hollow portion is formed on the inner side, and sidewalls having a plurality of first connecting holes forming downward parabolic lines are formed on both sides of the hollow portion toward the middle of the span. A plurality of girder bodies having upper and lower flange portions formed at a lower portion thereof, forming a downward parabolic line toward both ends of the upper flange portion, and a second connecting hole forming an upper parabolic line at an intermediate portion thereof;

A sheath tube inserted into and connected to the first and second connection holes;

A first PC steel wire inserted into a sheath tube inserted into and connected to the first connection hole so as to integrate the plurality of girder bodies in the longitudinal direction;

Girder bodies integrated by the first PC steel wire and the second PC steel wire is inserted into the sheath tube inserted into the second connection hole to be integrated in the transverse direction, the second PC steel wire.

On the other hand, look at the construction method of the box-girder for the segmented bridge using the above-described tension in the longitudinal and transverse direction;

Transporting a plurality of pre-fabricated girder bodies to a bridge construction site through concrete pouring in a factory;

Longitudinally connecting the transported girder bodies to be the same length as the span distance;

Inserting the sheath tube and the first PC steel wire into the first connection hole of the girder bodies communicating with each other, and then lengthening and integrating the girder bodies in the longitudinal direction;

Translating the girder bodies and the girder bodies integrally longitudinally by the first PC steel wire in the transverse direction to have a length equal to the width of the bridge;

Inserting the sheath tube and the second PC steel wire into the second connection hole of the girder body in communication with each other, and then tensioning and integrating the girder bodies and the girder bodies in a transverse direction;

Constructing a cross-packaging on top of the girder body is constructed.

According to the present invention, the bridge construction by carrying the lightweight girder body pre-fabricated in the factory at the bridge construction site to the bridge construction site to closely bind each other in the longitudinal direction through the tension of the first PC steel wire so that they are the same length as the span distance By making it possible, the internal core permanently installed in the girder is discharged during the bridge construction to reduce the weight of the girder to ensure the safety of the bridge, and to maintain the high quality of the product by blocking the inflow of foreign substances in advance. Of course, there is an effect that can be easily produced regardless of climate change.

In addition, the upper flange portion formed on the girder body and the upper portion formed by girder bodies and the girder bodies, which are bound in the longitudinal direction, by tensioning and fixing the second PC steel wire, thereby tightly binding each other in the lateral direction to construct a bridge. The rigidity of the deflection on the contact area of the flange part makes it possible to achieve a solid bridge overhead facility.

Hereinafter, with reference to the accompanying drawings will be described in detail the box girder for the segmented bridge using a steel wire tensioned in the longitudinal and transverse direction of the present invention.

Figure 2 is a perspective view showing a box girder for segmented bridges using steel wires tensioned in the longitudinal and transverse directions according to a preferred embodiment of the present invention, Figure 3 is a longitudinal and transverse direction in accordance with a preferred embodiment of the present invention 4 is an exploded perspective view illustrating a box girder for segmented bridges using tensioned steel wires, and FIG. 4 is a first PC wire of segmented bridge box girder using steel wires tensioned in the longitudinal and transverse directions according to a preferred embodiment of the present invention. Figure 5 is a longitudinal cross-sectional view showing a connection relationship of, Figure 5 is a cross-sectional view showing the connection relationship of the second PC steel wire of the box-girder for segmented bridges using the steel wire tensioned in the longitudinal and transverse direction in accordance with a preferred embodiment of the present invention.

2 and 5, the box box girder 100 of the present invention is connected to the lower facilities of the bridge to be in contact with each other in the longitudinal direction and the transverse direction, the upper facilities of the bridge to be installed, span through the concrete pouring Girder body 110 is made of a plurality of segments to have the same length as the distance; Sheath pipe 120 is connected to the girder body 110; The first PC steel wire 130 for integrating the girder body 110 in the longitudinal direction and the second PC steel wire 140 for integrating the girder body 110 in the lateral direction.

On the other hand, the girder body 110 is manufactured through concrete pouring in the factory by the span distance. In this case, the girder body 110 has a hollow portion 111 formed therein, and sidewalls 113 are formed on both sides of the hollow portion 111.

Here, the side wall 113 is formed with a plurality of first connecting holes 114 therein.

At this time, the first connection hole 114 is preferably formed to form a parabolic downward toward the middle of the span when connecting the girder body 110 in the longitudinal direction.

In addition, an upper flange portion 115 is formed at an upper portion of the hollow portion 111, a lower flange portion 116 is formed at a lower portion thereof, and the upper flange portion 115 has a second connection hole 117 therein. ) Is formed.

In this case, the second connecting hole 117 is preferably formed to form a downward parabolic line at both ends, and to form an upward parabolic line at the middle portion.

Here, the sheath pipe 120 is inserted into each of the first connection hole 114 and the second connection hole 117 communicating with each other, thereby protecting the first PC steel wire 130 and the second PC steel wire 140. do.

On the other hand, the first PC steel wire 130 is inserted into the sheath tube 120 is inserted into the first connection hole 114.

Accordingly, when both ends of the first PC steel wire 130 is tensioned and fixed, the plurality of girder bodies 110 are in close contact with each other and integrated in the longitudinal direction.

In this case, the plurality of grooves 150 formed on one side of the girder body 110 are inserted into the plurality of protrusions 160 formed on the other side of the girder body 110 making surface contact with the surface.

Accordingly, the longitudinal contact portion of the girder body 110 can achieve a more intimate connection relationship. Here, the groove 150 and the protrusion 160 may not be formed at the shortest part seated on the pier P (see FIG. 6).

On the other hand, the second PC steel wire 140 is inserted into the sheath tube 120 is inserted into the first connection hole 114.

Accordingly, when both ends of the second PC steel wire 140 is tensioned and fixed, the girder bodies 110 and the girder bodies 110 integrated by the first PC steel wire 130 are integrated in the lateral direction.

At this time, the fixing of the first PC steel wire 130 and the second PC steel wire 140 is made through a known anchorage, a detailed description thereof will be omitted.

Accordingly, the box girder for segmented bridges using steel wires tensioned in the longitudinal and transverse directions of the present invention can secure the safety of the bridge by reducing the weight of the girder by discharging the inner core permanently installed in the girder during the construction of the bridge. By making concrete curing process at the factory during the girder manufacturing process, foreign material inflow can be prevented in advance to maintain the high quality of the product, and it can be easily manufactured regardless of climate change. It will be described in detail with reference to the drawings.

6 is a side view showing a construction state of the box-girder for the segmented bridge using steel wires tensioned in the longitudinal and transverse directions according to a preferred embodiment of the present invention.

Referring to FIG. 6, first, a plurality of girder bodies 110 manufactured in advance at the factory are connected to have the same length as the span distance of the bridge. At this time, the first connection hole 114 is to communicate with each other.

At this time, the groove portion 150 formed on one side of the girder body 110 is inserted into the protrusion 160 formed on the other side of the girder body 110 in contact with the surface.

Thereafter, the sheath tube 120 and the first PC steel wire 130 are inserted into the first connection hole 114, and then the first PC steel wire 130 is tensioned and fixed.

Accordingly, the girder bodies 110 connected to each other are integrated in the longitudinal direction by the first PC steel wire 130 and have a large deflection rigidity.

Thereafter, the girder bodies 110 and the girder bodies 110 connected by the first PC steel wire 130 are positioned in contact with each other so that the second flange 117 communicates with each other. After the sheath tube 120 and the second PC steel wire 140 is inserted into the second connection hole 117, the second PC steel wire 140 is tensioned and fixed.

Accordingly, the girder body 110 and the girder body 110 are integrated in the transverse direction by the second PC steel wire 140 and at the same time the portion of the upper flange portion 115 and the upper flange portion 115 in contact with each other. Improves durability by increasing the stiffness of deflection.

On the other hand, look at the construction method using the box-girder 100 for the segmented bridge using the above-described series of longitudinal and tensioned steel wire;

The girder body 110 is pre-fabricated through concrete pouring in the factory to the bridge construction site to connect the girder bodies 110 in the longitudinal direction to have the same length as the span distance.

Thereafter, the sheath tube 120 and the first PC steel wire 130 is inserted into the first connection hole 114 of the girder bodies 110 communicated with each other, and after tension, the girder bodies 110 are integrated in the longitudinal direction. Let's do it.

Thereafter, the girder bodies 110 and the girder bodies 110 integrated in the longitudinal direction by the first PC steel wire 130 are in surface contact in the transverse direction to have the same length as the width of the bridge.

Thereafter, the sheath tube 120 and the second PC steel wire 140 is inserted into the second connection hole 117 of the girder body 110 in communication with each other, and then tensioned and settled to the girder bodies 110 and the girder body ( 110 are integrated in the transverse direction.

Thereafter, the bridge box girder 100 connected in this way is installed between the bridge pi (P) and the bridge (P), and then the bridge construction on the top of the girder body (110).

Accordingly, the present invention is a segmental bridge box girder using a steel wire tensioned in the longitudinal direction and the transverse direction by making a plurality of girder body to make this segment by tightly binding through the first PC steel wire during construction, the interior of the It can maintain the hollow part without the inner core, thereby reducing the weight of the bridge deck facility, thereby ensuring the safety of the bridge, and building the bridge by closely binding the girder bodies to each other through the second PC steel wire. By doing so, the rigidity of the sag bridge over the upper flange portion and the contact portion of the upper flange portion is excellent to achieve a solid bridge upper facility.

1 is a perspective view showing a conventional box girder,

2 is a perspective view showing a box girder for segmented bridges using steel wires tensioned in the longitudinal and transverse directions according to a preferred embodiment of the present invention;

3 is an exploded perspective view showing a box girder for segmented bridges using steel wires tensioned in the longitudinal and transverse directions according to a preferred embodiment of the present invention;

Figure 4 is a longitudinal cross-sectional view showing the connection relationship between the first PC steel wire of the box girder for segmented bridges using steel wires tensioned in the longitudinal and transverse directions in accordance with a preferred embodiment of the present invention,

5 is a cross-sectional view showing a connection relationship between the second PC steel wire of the box girder for segmented bridges using steel wires tensioned in the longitudinal and transverse directions in accordance with a preferred embodiment of the present invention, and

Figure 6 is a side view showing the construction state of the box-girder for segmented bridges using steel wires tensioned in the longitudinal and transverse directions in accordance with a preferred embodiment of the present invention.

<Explanation of symbols for the main parts of the drawings>

110: girder body 113: side wall

115: upper flange portion 116: lower flange portion

120: sheath pipe 130: first PC steel wire

140: second PC steel wire 150: groove

160: protrusion P: piers

Claims (3)

In the box girder for bridges that are connected to the lower facilities of the bridge in contact with each other in the longitudinal and transverse directions, The bridge box girder 100 A plurality of bridges are connected in contact with each other by the distance of the bridge, the hollow portion 111 is formed on the inside, and the plurality of first connecting holes 114 forming a downward parabola toward the middle of the span on both sides of the hollow portion 111 Sidewalls 113 having the upper and lower flanges 115 and 116 are formed on the upper and lower portions of the hollow portion 111, and form a downward parabola toward both ends of the upper flange portion 115, A plurality of girder bodies 110 in which a second connecting hole 117 forming an upward parabola is formed in the middle portion; Sheath pipe 120 inserted into the first connecting hole 114 and the second connecting hole 117; The first PC steel wire 130, which is inserted into the sheath tube 120 is connected to the first connecting hole 114 and tensioned, so as to integrate the plurality of girder body 110 in the longitudinal direction and The girder body 110 and the girder body 110 integrated by the first PC steel wire 130 are inserted into the sheath tube 120 inserted into the second connecting hole 117 so as to integrate the girder body 110 in the transverse direction. Box girder for segmented bridges using steel wires tensioned in the longitudinal and transverse directions, characterized by comprising a second PC steel wire 140, which is tensioned and settled. The method of claim 1, A plurality of grooves 150 are formed on one side to closely contact the girder body 110, and a plurality of protrusions 160 are integrally formed on the other side making contact with the grooves 150. Box girder for segmented bridges using steel wires tensioned in longitudinal and transverse directions. Transporting a plurality of girder bodies 110 prepared in advance through concrete pouring in a factory to a bridge construction site; Longitudinally connecting the transported girder bodies 110 to a length equal to the span distance; Inserting the sheath tube 120 and the first PC steel wire 130 in the first connection hole 114 of the girder body 110 in communication with each other after the tension, and settled to integrate the girder body 110 in the longitudinal direction. ; Surface-contacting the girder bodies 110 and the girder bodies 110 integrated in the longitudinal direction by the first PC steel wire 130 so as to have the same length as the width of the bridge; The sheath tube 120 and the second PC steel wire 140 is inserted into the second connection hole 117 of the girder body 110 in communication with each other and then tensioned, and then settled to the girder bodies 110 and the girder body 110. Integrating them transversely; The construction method of the segment girder box girder using a steel wire tensioned in the longitudinal and transverse direction, characterized in that the construction including the; constructing the cross-section packaging on top of the girder body (110).

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