KR20200022143A - Girder launching system using rail and trolley - Google Patents

Abstract

The present invention relates to a girder launching system using a rail and a trolley, comprising: tower supports coupled to upper sides of piers of a bridge; lateral rails coupled to upper sides of the tower supports to be laterally installed; a main truss which is longitudinally installed on the upper sides of lateral rails, and includes a pair of left and right trusses; roller assemblies which are installed between the lateral rails and the main truss to be laterally moved on the lateral rails, and include rollers to allow the main truss to be longitudinally moved; and a front winch and a rear winch installed between the pair of trusses of the main truss to be longitudinally moved, wherein the front winch is installed in the front and the rear winch is installed in the back. By introducing rails and a trolley system, a girder is received from the rear of the girder launching system by the trolley system and mounted to allow the main truss to continuously move forward, thereby remarkably reducing the construction time and costs of the girder.

Description

Girder launching system using rail and trolley}

The present invention relates to a girder launching system using a rail and a trolley, and more particularly, to a technology capable of reducing girder construction period and construction cost by transporting and supplying girder to the rear of the main truss using the rail and trolley from the rear. will be.

In general, bridges are structures that are constructed across roads, rivers, valleys, and the like, and are composed of bridges (including shifts), girders, and slabs. Such bridges first construct piers at regular intervals in the longitudinal direction, mount girders on these piers, and then construct slabs on top of the girders.

Normally the pier is constructed directly in the field, the girders are mounted to the pre-fabricated to the upper side of the pier. A girder launching system is known for mounting girders on top of piers.

For example, Korean Patent No. 10-1239621, 'Beam Launching Method' is known (see FIGS. 5A and 5B). This prior art is provided with "cross rail 150 and the under roller 160 to the bridge 210, the front end and the rear end bottom is formed so that the height gradually increases toward the middle portion between the tip and the rear end The roller guide part 300 formed in the shape of a curved downward parabola having the largest height in the middle part launches the beam launcher 100 mounted on the bottom of the front and rear end struts 170 and 180 to be supported by the under roller 160. Beam launching method using an end strut formed with a roller guide portion (see claim 1), characterized in that it comprises a step of making a simple, the inclination angle of the front end struts and rear end struts installed on the front and rear of the mold truss is simplified. It can be adjusted in the field while preventing the launch of the mold truss 110, so that the safe and efficient launching of the mold truss And a launching beam method provided with a roller guide strut end portion is formed for that purpose.

However, in the case of the beam launching method and the apparatuses used therein, the air of the bridge construction is considerably longer because the mold truss must repeat the process of continuously reciprocating the front to install the girder and the rear to which the girder is supplied. There is a problem.

Therefore, it is required to develop a technology that can shorten the air and reduce the construction cost of the bridge by improving the girder supply method.

Patent 1: Republic of Korea Patent No. 10-1239621

In order to solve the above problems, by introducing the rail and trolley system, the girder is supplied by the trolley system, the main truss is continuously moved forward only, so that the construction period and construction cost of the girder can be greatly reduced. And to provide a girder launching system using a trolley.

A girder launching system using a rail and a trolley according to an example of the present invention includes: tower supports coupled to upper sides of bridges of a bridge; Transverse rails installed in the transverse direction coupled to the upper side of the tower supports; Main trusses which are installed in the longitudinal direction on the upper side of the transverse rails including a pair of left and right trusses; Roller assemblies installed between the transverse rail and the main truss, the roller assemblies including rollers which are movable in the transverse direction on the transverse rail and move in the longitudinal direction; And a front winch installed at the front and a rear winch installed at the rear to be installed between the pair of trusses of the main truss to be movable in the longitudinal direction.

The apparatus may further include a rail installed at the rear lower side of the main truss and a trolley system installed at an upper side of the rail, mounted on the upper side of the trolley system, and transported to the rear lower side of the main truss by the trolley system. After lifting the girder directly to the front winch and the rear winch may be characterized by moving to the mounting position.

In addition, the process of lifting the girder by the front winch and the rear winch is to lift the front part of the girder with the front winch and move a forward distance with the rear trolley of the trolley system, and then lift the rear part of the girder with the rear winch. It may be characterized by.

In addition, the rail may be installed on the upper side of the adjacent pair of girders of the girders mounted while the main truss moves forward.

In addition, sleepers may be installed between the rails and the girders at a predetermined interval.

In addition, the trolley system may include a front trolley installed at the front, a rear trolley installed at the rear of the front trolley, and may include a power generating device coupled to the front trolley or the rear trolley.

In addition, the front trolley and the rear trolley is provided with a girder support device for supporting girders on the left and right, the girder support device may be characterized in that it is rotatably coupled to the front trolley and the rear trolley and stretchable at the same time.

In addition, the power generator, the front and rear trolley may be characterized in that the width can be adjusted to the width of the rail.

In addition, the girder construction method using a girder launching system using a rail and a trolley according to an example of the present invention, the front girder and the rear winch installed on the main truss girders transported to the rear near the shift first and the front of the shift Installing in a first span between the piers; The main truss is forwarded so as to be supported by a first transverse rail provided at the alternating position, a second transverse rail provided at an upper side of the first pier, and a third transverse rail provided at an upper side of the second pier in front of the first pier. Self-propelled with; Removing the first horizontal rail by lowering the rear leg provided at the rear of the main truss while supporting the rear of the main truss; Mounting a girder on the trolley system provided at the rear of the shift and transporting the trolley system to the rear near the first pier by the driving of the trolley system; Lifting the transported girders by the front winch and the rear winch and moving forward to move to a second span hypothesis position between the first and second piers; Moving the main truss in the lateral direction to mount a girder on the second span; in order to perform construction.

In addition, the process of lifting the conveyed girder by the front winch and the rear winch, after lifting the front part of the girder with the front winch and moving forward a certain distance with the rear trolley of the trolley system and then the girder with the rear winch It may be characterized by lifting the rear portion of the.

In addition, a rail to which the trolley system is movable may be installed at the girder mounted on the rear of the shift and the first span, and a sleeper may be installed at a lower side of the rail.

Through the present invention, the chain installed in the longitudinal direction of the main truss is installed by winding the chain wheels in a zigzag, the main truss, the front winch and the rear winch can be smoothly running in the longitudinal direction even if the longitudinal inclination increases Can be provided.

In addition, the circumference of the wire 94, the entire main truss is completely rounded and can provide an effect that the structural stability of the main truss is significantly increased.

In addition, by introducing the holding system 100, it is possible to provide an effect of stably fixing the main truss to the roller assembly.

In addition, by introducing the fixing system 110, it is possible to provide the effect that the front winch and the rear winch can be stably fixed to the roller assembly.

In addition, by introducing the rail and the trolley system, by supplying the girder by the trolley system, the main truss continues to move forward only, it can provide an effect that the construction period and the construction cost of the girder can be greatly reduced.

1 is a perspective view illustrating a girder launching system of a girder launching system using a used rail and a trolley according to an example of the present invention.
2A and 2B are side and enlarged views illustrating the chain and the chain wheel of the girder launching system according to an example of the present invention.
2C to 2E are side views, top views, front views, and partial enlarged views showing a state in which the main wire is wound around the main truss, and the holding system 100 is fixed to the main truss.
2F-2H are side, front, and top views illustrating a fastening system 110 that secures the front winch and the rear winch to a roller assembly.
3A is a front view illustrating a state in which girder is transported using a rail and a trolley.
3B is a front view showing the girder launching system lifting a girder transported using a rail and a trolley.
4A to 4H are views illustrating a process of installing a girder through a girder launching system using a rail and a trolley according to an example of the present invention.
5 is a diagram of the prior art.

Hereinafter, some embodiments of the present invention will be described in detail with reference to the accompanying drawings. In adding reference numerals to the elements of each drawing, the same elements are designated by the same reference numerals as much as possible even though they are shown in 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 disturbs the understanding of the embodiment 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 may be another component between each component. May be “connected”, “coupled” or “connected”.

Hereinafter, a girder launching system using a rail and a trolley according to an example of the present invention will be described in detail with reference to FIGS. 1 to 4.

Referring to FIG. 1, a girder launching system using a rail and a trolley according to an example of the present invention includes: tower supports 10 coupled to upper sides of bridges 1; Transverse rails 20 are coupled to the upper side of the tower support 10 installed in the transverse direction; Main trusses 30 which are installed in the longitudinal direction on the upper side of the transverse rails including a pair of left and right trusses; Installed between the transverse rail 20 and the main truss 30 includes a roller that is movable on the transverse rail 20 in the lateral direction and at the same time the main truss 30 is movable in the longitudinal direction. Roller assemblies 40; And a front winch 50 installed at a front side and a rear winch 52 installed at a rear side between the pair of trusses of the main truss 30 so as to be movable in the longitudinal direction.

In this embodiment, the longitudinal direction refers to the axial direction, and the transverse direction refers to the direction perpendicular to the axial axis. The front also refers to the direction in which the girder launching system advances to mount the girder, and the rear refers to the opposite direction.

The present embodiment may include tower supports 10 installed between the positions where girders are to be installed above the pier 1 (including shifts). That is, the tower supports 10 may be installed between the girders. The tower support 10 in the drawing is formed in a truss shape, but is not limited thereto. That is, the tower support 10 may also have other shapes such as pillars that can safely and firmly support the transverse rails 20.

The transverse rails 20 may be installed above the tower supports 10. That is, the transverse rails 20 may be coupled to the upper side of the tower supports 10 coupled to the upper side of the pier 1 in the transverse direction. The height of the horizontal rail 20, that is, the height of the tower support 10 is preferably higher than the upper side of the girder to be installed.

The main truss 30 may be installed on the lateral rail 20 to move the girder while moving in the longitudinal direction and the lateral direction. The main truss 30 may include a pair of left and right trusses and a connecting truss connecting the left and right pair of trusses. An H beam or the like may be used instead of the connecting truss. Main truss 30 may be installed long in the longitudinal direction on the upper side of the transverse rails (20). In general, the main truss 30 should have a length more than enough to span three transverse rails 20 installed in the longitudinal direction. That is, when the main truss 30 travels in the longitudinal direction from the upper side of the horizontal rails 20 which are spaced apart in the longitudinal direction, the main trusses 30 may be prevented from falling by spanning the at least two transverse rails 20.

Roller assemblies 40 may be installed between the horizontal rail 20 and the main truss 30. Exactly, it is installed between the horizontal rail 20 and each of a pair of left and right trusses. The roller assemblies 40 comprise a plurality of rollers. That is, the rollers are installed at the lower side to move in the lateral direction on the horizontal rail 20, and the rollers are installed at the upper side to allow the main truss 30 to move in the longitudinal direction. Therefore, the rollers installed on the lower side of the shaft is in the longitudinal direction, the rollers installed on the upper side may be formed in the transverse direction. In addition, the roller assembly 40 may be configured to be rotatable by connecting the lower portion and the upper portion with a pin. That is, when the main truss 30 approaches the roller assembly 40, the upper side of the roller assembly 40 may be properly rotated so that the main truss 30 may be easily climbed onto the roller assembly 40.

The roller assembly 40 allows the main truss 30 to move in the longitudinal and transverse directions on the transverse rail 20. That is, after lifting the girder with the front winch 50 and the rear winch 52, which will be described later, the main truss 30 slides on the upper side of the roller assembly 40 to move in the longitudinal direction, and the roller assembly 40 is laterally lateral. The girder may be mounted at a desired position by moving laterally on the rail 20. After lifting the girder with the front winch 50 and the rear winch 52, the main truss 30 may move in the longitudinal direction after first moving in the longitudinal direction on the main truss 30. This may be appropriately selected in consideration of the center of gravity including the weight of the main truss 30 and the front winch 50 and the rear winch 52 and the girder.

The front winch 50 and the rear winch 52 are installed between the pair of trusses of the main truss 30. After the front winch 50 and the rear winch 52 lifts the girder, the front winch 50 moves in the longitudinal direction on the main truss 30 to lower the position to be mounted.

2A and 2B, chains 80 and front winches 50 and rear winches are installed in each of the left and right pair of trusses in a longitudinal direction and both ends are fixed to the front and rear of the pair of trusses, respectively. The chain wheels 82 may be further provided at 52.

The chains 80 are installed by zigzag winding the chain wheels 82 up and down, and the front winch 50 and the rear winch 52 do not slide along the main truss 30 as the chain wheels 82 rotate. Can move in the longitudinal direction.

The movement power of the front winch 50 and the rear winch 52 is determined by the chain wheels 82 provided on both sides of the front winch 50 and the rear winch 52 and the chain 80 provided on the pair of trusses. Can be delivered through. That is, the chains 80 are vertically installed on each of the left and right pair of trusses, and both ends of the chains 80 may be fixed to the front and rear of the pair of trusses, respectively. In addition, a plurality of chain wheels 82 provided in the longitudinal direction on both sides of the front winch 50 and the rear winch 52 may be installed in a row in the longitudinal direction, or may be installed in a zigzag shape in the vertical direction as shown in the figure. . In any case, the chains 80 may be installed by winding the chain wheels 82 in a vertical direction.

When power is supplied, the driving chain wheel 82 of the chain wheels 82 rotates, thereby causing the chain 80 wound around the chain wheels 82 to be tensioned forward or rearward, and thus with the front winch 50. The rear winch 52 is moved forward or rearward on the main truss 30. Sliding is prevented by the chain 80 wound around the chain wheels 82 in a zigzag shape, so that the front winch 50 and the rear winch 52 can safely proceed in the longitudinal direction without slipping on the main truss 30. When the main truss 30 is inclined by the height difference of the pier 1, the front winch 50 and the rear winch 52 do not slip, and thus the girder may be safely transported by moving on the main truss 30.

2C to 2E, the main truss 30 may be tensioned by a round wire 94 that tightens the entire main truss 30. That is, the lower rollers 90 are respectively installed at the front and rear lower sides of each of the left and right pair of trusses, and the upper rollers 92 are respectively installed at the front and rear upper sides of the pair of trusses, respectively, It is possible to install a one-round wire 94, which is wound around the rollers 90 and the upper rollers 92.

Specifically, the rotary shafts of the lower rollers 90 are installed in the transverse direction, and the rotary shafts of the upper rollers 92 are installed in the longitudinal direction, and the peripheral wire 94 is the front lower roller 90 of the one truss and the front upper part. Roller 92, the front upper roller 92 of the other truss, the front lower roller 90, the rear lower roller 90, the rear upper roller 92, the rear upper roller 92 of the one truss, the rear lower roller (90), the front lower roller (90) in turn in order to be able to take a round after the tension can be connected. That is, the one-round wire 94 is a U-shaped concave in the center when viewed from the side, n-shaped when viewed from the front and the main truss by tensioning the rollers up, down, left and right in a state that is not fixed at any point The structural rigidity of 30 can be greatly increased. The main truss 30 of the present embodiment is not only magnificent in length but also may be exposed to strong wind or the like when moving on the roller assembly 40 mounted on the lateral rail 20 after lifting the girder of weight, and thus structurally unstable elements. Although having a one-round wire 94 is firmly tensioned can increase the structural rigidity.

In addition, the girder launching system using a rail and a trolley according to an example of the present invention may include a holding system 100 for fixing the main truss 30 to the roller assembly 40.

The holding system 100 may include a holding flange 102 coupled to a point of the one-way wire 94 positioned between the front lower roller 90 and the rear lower roller 90. A through hole may be formed in the holding flange 102, and a holding pin 104 may be inserted into the through hole. In addition, a through hole corresponding to the through hole formed in the holding flange 102 may be formed in the roller assembly 40. That is, by matching the through hole formed in the holding flange 102 coupled to one point of the one-way wire 94 with the through hole formed in the roller assembly 40, the holding pin 104 is inserted and coupled to the main truss ( 30) can be fixed. That is, the front winch 50 receives the girder supplied from the rear trolley system 70 which is described later by the main truss 30 in a stable state by fixing the main truss 30 to the roller assembly 40 by the holding system 100. After lifting through the rear winch 52 can be mounted on the desired position. In the case of simply fixing one point of the truss to the roller assembly 40 without the holding system 100 coupled to the one-round wire 94, it is difficult to maintain a stable fixed state due to the characteristics of the main truss 30 having a long length and a heavy weight. This embodiment can be said to be a solution.

2F to 2H, a girder launching system using a rail and a trolley according to an example of the present invention includes a fixing system 110 for fixing the front winch 50 and the rear winch 52 to the roller assembly 40. It may further include. The fixing system 110 is installed on the front, rear and left and right sides of the front winch 50 and the rear winch 52, respectively, and the inclined rollers 112 are installed to be inclined so as to converge on the virtual axis of the lower side. Winding the rollers 112 to the front wire 114 toward the lower virtual one axis, the rear right and left inclined rollers 112 to the rear wire 116 toward the virtual one axis, the front wire It may include a fixing pin 118 for fixing the 114 and the rear wire 116.

The fixing of the front wire 114 and the rear wire 116 may be coupled to the roller assembly 40 with the fixing pins 118 using the holes of the ring after forming the rings therein. In addition, the V-shaped angle connecting the ends of the front wire 114 and the rear wire 116 is coupled to form a hole in the center of the angle, and then using the hole fixed to the roller assembly 40 ( 118).

In addition, the front wire 114 and the rear wire 116 may be installed only on the outside of the main truss 30, only on the inside of the main truss 30, or may be installed on both the inside and the outside. In other words, it may be installed outside the main truss 30, that is, outside the left and right pair of trusses, or installed inside the main truss 30, that is, inside the left and right pair of trusses, or both. When the front wire 114 and the rear wire 116 are installed on both the outside and the inside of the main truss 30, the front winch 50 and the rear winch 52 can be more stably fixed. Fixing system 110 using the inclined rollers 112, the front wire 114 and the rear wire 116, the front winch (50) and the rear winch (52) by tightening the overall tension rather than a point, very stable State can be maintained.

The fixing system 110 may be used to advance the main truss 30 in the longitudinal direction. That is, when the front winch 50 or the rear winch 52 is fixed to the roller assembly 40 and the chain wheel 82 of the front winch 50 or the rear winch 52 is rotated with power, the main truss 30 is Will move. Therefore, after fixing the front winch 50 or the rear winch 52 by using the fixing system 110, the main truss 30 can be moved to a desired point. This allows the main truss 30 to move without slipping even when the longitudinal slope is large.

3 and 4, the girder launching system using the rail and the trolley according to an example of the present invention is a trolley system installed on the rail 60 and the rail 60 is installed on the rear lower side of the main truss 30. 70 may be included.

The rail 60 may be installed on the upper side of the ground at the rear of the first span 7 to perform the first girder construction. In addition, the main truss 30 may be installed above the girder after the girder is moved forward. Rail 60 is installed on the upper side of the girder is completed, it is possible to transport the girder to the rear of the main truss 30 as the main truss 30 moves forward. Therefore, the construction of the girder can proceed quickly by continuously moving the main truss 30 without reciprocating back and forth.

The rail 60 may be installed in a pair of neighboring girders among a plurality of girders. The rail 60 is installed in a pair of neighboring girders, and is preferably installed in a pair of girders which are usually installed in the middle.

Sleepers may be installed at regular intervals between the rails 60 and the girders. That is, the sleeper can be fixed using a shear bar or the like provided on the upper side of the girder, and the rail 60 can be installed on the upper side of the sleeper.

The trolley system 70 is coupled to the front trolley 72 installed at the front, the rear trolley 74 installed at the rear of the front trolley 72, the front trolley 72 or the rear trolley 74 for power. It may include a power generating device 76 for generating.

The front trolley 72 and the rear trolley 74 of the trolley system 70 can be moved together by the girder mounted on the upper side in a separated state. In this case, since the front trolley 72 and the rear trolley 74 are separated, the girders of various lengths can be easily transported. In addition, a connection member for connecting the front trolley 72 and the rear trolley 74 may be provided. This can ensure stability by integrating the front trolley 72 and the rear trolley 74 by the connecting member.

A power generator 76 may be coupled to the front trolley 72 or the rear trolley 74 of the trolley system 70. That is, power is transmitted to the trolley on one side of the front trolley 72 or the rear trolley 74 by the power generator 76, and the power is transferred to the other trolley through the girder mounted on the upper side to move together. have.

The power generating device 76, the front trolley 72 and the rear trolley 74 may adjust the width to match the width of the rail (60). That is, the spacing interval of the girders installed on the upper side of the bridge (1) for each construction bridge can be different, by adjusting the width of the power generating device 76, the front trolley 72 and the rear trolley 74, Girders can be easily transported regardless of width.

Girder support device 78 may be installed on the left and right sides of the front trolley 72 and the rear trolley 74 of the trolley system 70. The girder support device 78 may support in both directions so that the girder mounted on the front trolley 72 and the rear trolley 74 does not fall left and right. The girder support device 78 may be rotatably hinged to each of the left and right sides of the front trolley 72 and the rear trolley 74. In addition, the girder support device 78 may be formed to be stretchable. Therefore, the girder support device 78 can easily support girders of various sizes and shapes, and can also be in close contact with the side of the girder.

In addition, the girder support device 78 may be formed to be adjustable in length. Therefore, the length of the girder support device 78 is extended or reduced, so that the length of the girder support device 78 can be adjusted according to the size of the girder, and the girder support device 78 can be closely adhered to the side of the girder to stably support the girder. In addition, the girder support device 78 may be adjusted in size by hydraulic pressure. This can automatically support the girders.

Therefore, the girder is mounted on the upper side of the front trolley 72 and the rear trolley 74 of the trolley system 70, and the girder is transported to the rear lower side of the main truss 30 by the trolley system 70. After lifting the girder with the front winch 50 and the rear winch 52 and moving to the girder construction position, the main truss 30 of the girder launching system needs to reciprocate the front and rear to receive and install the girder. The construction period of girder can be remarkably shortened.

In addition, the process of lifting the girder by the front winch (50) and the rear winch (52), the front winch (50) by lifting the front portion of the girder by moving a certain distance in front of the rear winch (52). You can lift wealth. That is, after transporting the girder to the rear lower portion of the main truss 30 to the trolley system 70, the front winch 50 first lifts the front part of the girder and moves forward with the rear trolley 74 by a predetermined distance. Thereafter, the rear part of the girder may be lifted by the rear winch 52 and the girder may be transported by the front winch 50 and the rear winch 52. This method can lift the girder in the state where the main truss 30 is protruded rearward shortly, so that the rear part of the main truss 30 does not need to be supported by the rear leg 32. Therefore, the front and rear movement of the main truss 30 and the lowering and raising of the rear leg 32 are unnecessary, so that the girder mounting operation can be performed quickly.

Hereinafter, a girder construction method using a girder launching system using a rail and a trolley as an example of the present invention will be described in detail with reference to FIGS. 3 and 4.

This embodiment may omit the description of the configuration described in the above embodiment. Description of the configuration omitted description may be inferred to the description of the above-described embodiment.

In the girder construction method using the girder launching system using the rail and the trolley which is an example of the present invention, girders transported to the rear near the shift are alternated by using the front winch 50 and the rear winch 52 installed on the main truss 30. And installing in the first span 7 between the first piers 3 in front of the shift; The first truss 30 is installed at the alternating position, the second transverse rail 24 provided above the first pier 3, and the first pier 3 in front of the first truss 3. Self-propelling forward to be supported by a third transverse rail 26 provided above the second piers 5; Removing the first horizontal rail (22) by lowering the rear leg (32) provided at the rear of the main truss (30) while supporting the rear of the main truss (30); Mounting a girder on the trolley system 70 provided at the rear of the shift and transporting the trolley system 70 to the rear near the first piers 3 by self-driving; After lifting the transported girders by the front winch 50 and the rear winch 52 and moving forward to the second span 9 temporary position between the first pier 3 and the second pier 5. Moving; Mounting the girder to the second span (9) by moving the main truss 30 in the lateral direction; can be constructed in order.

In the step of installing the girders in the first span 7, the girders prepared in advance in the production site may be transported to the vicinity of the alternating rear using a straddle carrier or a trailer and a crane. Thereafter, the transported girders may be moved and mounted between the first span 7, that is, between the shift and the first pier 3 in front of the shift using the front winch 50 and the rear winch 52. In this step, the main truss 30 can be moved by moving in the lateral direction after self-advancement.

In the step of self-propelling the main truss 30, after the girder mounting work of the first span 7 is completed, the main truss 30 is temporarily pushed forward so that the front of the main truss 30 is the third transverse rail 26 above the second piers 5. ) Until it is supported. Accordingly, the main truss 30 includes the first transverse rail 22 at the alternate position, the second transverse rail 24 at the upper side of the first pier 3, and the third transverse rail 26 at the upper side of the second pier 5. This step is to advance to support the three points.

Removing the first transverse rail 22, the rear leg 32 provided on the rear of the main truss 30 is lowered to support the rear of the main truss 30, that is, the rear of the main truss 30 Is slightly lifted and the first transverse rail 22 is removed. This is for transporting the girder through the rail 60 on the upper side of the girder mounted on the ground and the first span 7 on the rear side of the shift.

The step of transporting the girder to the rear near the first pier 3 is the step of transporting the girder to the rear near the first pier 3 using the trolley system 70.

In this embodiment, the rails 60 may be installed on the girder on the rear side of the shift and the first span 7 which is installed first, and the sleepers may be installed below the rails 60. The rail 60 may be installed in advance on two girders of the center portion of the plurality of girders installed in the first span 7. That is, it is preferable to install the sleeper and the rail 60 in advance on the selected girder before mounting the girder to the first span (7).

The girders to be installed in the second span 9 are transported to the vicinity of the rear of the first piers 3 using the rail 60 and the trolley system 70 installed on the girders, so that the main truss 30 reciprocates back and forth. The girder installation can be carried out very quickly by avoiding any time lost.

The step of moving the girder to the second span (9) temporary position, the front winch (50) and the rear winch (52) lifted the girder transported to near the rear of the first piers (3) and then moves forward to the first Moving between the pier 3 and the second pier 5.

In the step of moving the girder to the second span (9) temporary position, after lifting the front part of the girder with the front winch (50), after moving a predetermined distance forward with the rear trolley (74) of the trolley system (70) The winch 52 can lift the rear portion of the girder. This has the advantage that the main truss 30 can be lifted in a state slightly protruded to the rear.

In the foregoing 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 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 thereto. The scope of protection of the present invention should be interpreted by the following claims, and all technical ideas within the scope equivalent thereto should be construed as being included in the scope of the present invention.

1: piers
3: first piers
5: second piers
7: first span
9: second span
10: Tower Support
20: Cross rail
22: first cross rail
24: 2nd cross rail
26: 3rd side rail
30: main truss
32: rear leg
40: roller assembly
50: front winch
52: rear winch
60: rail
70: trolley system
72: front trolley
74: rear trolley
76: power generating device
78: girder support device
80: chain
82: chain wheel
90: lower roller
92: upper roller
94: round wire
100: holding system
102: holding flange
104: holding pin
110: fixed system
112: inclined roller
114: front wire
116: rear wire
118: push pin

Claims (11)

Tower supports coupled to the pier's upper sides of the bridge;
Transverse rails are installed in the transverse direction coupled to the upper side of the tower supports;
Main trusses which are installed in the longitudinal direction on the upper side of the transverse rails including a pair of left and right trusses;
Roller assemblies installed between the transverse rail and the main truss, the roller assemblies including rollers capable of moving in the transverse direction on the transverse rail and allowing the main truss to move in the longitudinal direction; And
A girder launching system using a rail and a trolley including; a front winch installed at a front side and a rear winch installed at a rear side between the pair of trusses of the main truss to be movable in the longitudinal direction.
The method according to claim 1,
And a trolley system installed above the rail and a rail installed below the main truss,
The girder is mounted on the upper side of the trolley system, and is transported to the rear lower side of the main truss by the trolley system. And girder launching system using trolley.
The method according to claim 2,
The step of lifting the girder by the front winch and the rear winch is to lift the front part of the girder with the front winch, and move the front part with the rear trolley of the trolley system, and then lift the rear part of the girder with the rear winch. Launching system using rail and trolley.
The method according to claim 2,
The rail is a girder launching system using a rail and trolley, characterized in that installed on the upper side of the adjacent pair of girders of the girders mounted while the main truss moves forward.
The method according to claim 4,
A girder launching system using a rail and a trolley, wherein sleepers are installed at regular intervals between the rail and the girder.
The method according to claim 2,
The trolley system is a front trolley installed in the front, the rear trolley installed in the rear of the front trolley, girder launch system using a rail and trolley, characterized in that it comprises a power generating device coupled to the front trolley or rear trolley.
The method according to claim 6,
The front trolley and the rear trolley is provided with a girder support device for supporting girders on the left and right,
The girder support device is a girder launching system using a rail and a trolley, which is rotatably coupled to the front trolley and the rear trolley.
The method according to claim 6,
The girder launching system using a rail and a trolley, wherein the power generating device, the front trolley and the rear trolley can adjust their width to match the width of the rail.
In the girder construction method using the girder launching system using the rail and trolley,
Installing girders carried to the rear near the shift in a first span between the shift and the first piers in front of the shift using a front winch and a rear winch installed on the main truss;
The main truss is forwarded so as to be supported by a first transverse rail provided at the alternating position, a second transverse rail provided at an upper side of the first pier, and a third transverse rail provided at an upper side of the second pier in front of the first pier. Self-propelled with;
Removing the first horizontal rail by lowering the rear leg provided at the rear of the main truss while supporting the rear of the main truss;
Mounting a girder on the trolley system provided at the rear of the shift and transporting the trolley system to the rear near the first pier by the driving of the trolley system;
Lifting the transported girders by the front winch and the rear winch and moving forward to move to a second span hypothesis position between the first and second piers;
Moving the main truss in a lateral direction to mount a girder on the second span; a girder construction method using a girder launching system using a rail and a trolley to be sequentially installed.
The method according to claim 9,
The process of lifting the transported girders by the front winch and the rear winch may include lifting the front part of the girder with the front winch, and then moving a forward distance with the rear trolley of the trolley system to the rear of the girder with the rear winch. Girder construction method using a girder launching system using a rail and trolley, characterized in that lifting the part.
The method according to claim 9 or 10,
Girder construction using a girder launching system using a rail and trolley, characterized in that the rail is installed on the girder mounted on the rear of the shift and the first span, the sleeper is installed on the lower side of the rail. Way.

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