KR20100013426A - Mold apparatus for forming concrete girder of bridge - Google Patents

Abstract

PURPOSE: A form system for molding a concrete girder of a bridge is provided to manufacture a concrete girder of a trapezoid shape installed in a straight section and a curved section. CONSTITUTION: A form system for molding a concrete girder of a bridge comprises a base frame(2), a bottom base form(6), outer forms(10), inner forms(14), second side frames(16), a suspension device(20), a second side frame movement unit, a first side frame movement unit, a suspension device movement unit, and a base plate(50). The bottom base form is installed on the base frame. The outer forms are installed in the inner sides of first side frames(8) to be respectively symmetrical. The second side frames support the inner forms. The suspension device hangs the second side frames on the top of the base frame. The first side frame movement unit moves the suspension device. The base plate molds a base surface of the concrete girder.

Description

Mold apparatus for forming concrete girder of bridges

The present invention relates to a formwork, and more particularly to a formwork for forming concrete girder for bridges.

Bridge work should be done in order to install trains, roads, etc. in the air on the ground or above the water. There are various bridge construction methods, but basically, girders are continuously placed on the piers constructed at regular intervals, and slabs or railway tracks are installed on them. In particular, the present invention relates to girders that can be used for driving purposes of tracked vehicles, such as trains, as shown in FIGS. 1 is a cross-sectional configuration of the bridge, Figure 2 is a perspective view of the girder to be provided by the formwork device of the present invention.

A concrete foundation 100 is placed on the ground, and a piers 102 are constructed on the foundation. A girder 104 having a substantially U-shaped cross section is placed on the pier 102 and a track 106 for the tracked vehicle is placed on the girder 104. The girder 104 has a flat bottom plate 108 and a side plate 110 extending upwardly inclined outwardly from both sides of the bottom plate and one end extending toward the center in a state connected to the upper end of the side plate 110. The upper plate 112 is configured. Accordingly, the cross section of the girder 104 takes the form of a wide bowl. The width of the girder 104 is about 7 to 9 m. The top plate 112 functions as a platform and has a width that is at least one worker can pass and a handrail is installed at the edge of the top plate 112. In order to couple the girder 104 to each other on the surface of the girders 102, the projections (commonly referred to as 'keys') are referred to on one side of the side surface. The groove is formed in the shear key is inserted. A plurality of shear keys 114 and grooves are formed along the shear surface of the girder. In addition, the girder 104 is provided with a plurality of steel wire holes 116 along the shear surface in the longitudinal direction thereof. This wire hole 116 is a passage for inserting a wire for the PSC beam.

An object of the present invention is to provide a formwork apparatus for manufacturing concrete girder for bridges as shown in FIG. Furthermore, it is to provide a formwork apparatus having a system capable of manufacturing trapezoidal girders installed in a curved section as well as a straight section. It is also an object of the present invention to provide a formwork device that allows the connection of the girder and the girder accurately.

The above object is to form a concrete girder for a bridge consisting of a bottom plate, a side plate installed to extend symmetrically upward from each side of the bottom plate;

A base frame installed flat at a constant height from the ground; A bottom bottom foam installed on the base frame to form a bottom of the bottom plate; First side frame frames symmetrically installed on both sides of the base frame; An outer surface foam symmetrically installed on the inner side of the first side frame to form an outer surface of the side plate; An inner side foam for forming an inner surface of the side plate; A second side frame for supporting the inner side foam; Suspending means for allowing the second side frame to be suspended above the base frame; A second side frame starting part for allowing the second side frame to be hinged to a position adjacent to the outer side surface foam selectively in a suspended state by the suspending means; A first side frame starting part for activating the first side frame to selectively adjoin both sides of the base frame; Suspension means starting unit for starting the suspending means so that the second side frame can be selectively positioned directly above the base frame; A curling plate for molding the curling surface of the girder; It is achieved by a formwork for forming concrete girder for bridges, characterized in that it comprises a frame for supporting the plate.

The present invention further includes a top plate forming means for simultaneously forming a top plate that is integrally installed on the side plate top to parallel to the bottom plate for the function of the platform; The upper plate forming means is formed integrally with the inner surface foam and the upper plate foam to be activated together with the inner surface foam; It is characterized in that it comprises a corner form which is installed on the top of the first side frame as to close the corner portions of both upper ends of the girder.

According to another embodiment of the present invention is characterized in that the molding foam for forming one side of the surface of the girder is formed by the surface of the cured girder already; A girder carriage for moving the base frame on which the already cured girders are placed; The girder carriage is installed to be movable along the rail installed at the base frame bottom, and furthermore, the hydraulic jack is installed at the top so that the length is changed in the vertical direction so that the base frame can be lifted and then moved.

According to the above configuration, there is provided a formwork apparatus that can easily manufacture a concrete girder for bridges as shown in Figure 2 having a predetermined unit length. The operator can carry the molded girders and install them immediately at the construction site, making the bridge construction simple. In addition, a formwork device is provided that can produce a girder installed in a straight section or curved section of the bridge as a single device. Also provided is a formwork device that uses the surface of the already cured girders as part of the formwork so that it can be precisely male and female combined with the already cured girders.

Hereinafter, with reference to the accompanying drawings in the detailed description of the present invention will be described in more detail. 3 is a schematic perspective view of a formwork apparatus for forming a concrete girder for bridges according to an embodiment of the present invention. 4 to 5 are schematic perspective views of the formwork apparatus for forming concrete girder for bridges showing the working state. 6 to 8 is a front configuration diagram according to the progress of the work. 9 is a side view. 10 is a plan configuration diagram of the girder continuously installed in the curve section, Figure 11 is a schematic plan configuration diagram of the girder and the formwork device. For the girder, reference numerals given through FIG. 2 are used.

The present invention; 2 is composed of a bottom plate 108, a side plate 110 installed to extend upward from both sides of the bottom plate 108, and an upper plate 112 installed on an upper side of the side plate 110 so as to extend toward the center. It is for forming a concrete girder (hereinafter referred to as 'girder') for the bridge as shown. The girder 104 is generally manufactured to a certain unit length (for example, 3 ~ 3.5m) and then transported to the construction site for use.

The base frame 2 on which the bottom plate 108 is mounted is installed to be spaced apart from the ground by a plurality of legs 4 at a predetermined height. A bottom bottom foam 6 for forming the bottom surface 108a of the bottom plate 108 is installed on the base frame. Screws 4a are installed at the ends of each leg 4 of the base frame 2 to adjust the horizontality of the bottom bottom foam 6.

The first side frame 8 is installed symmetrically on both sides of the base frame 2. The outer side foam 10 is installed symmetrically on the inner side of the first side frame 8 to form the outer surface 110a of the side plate 110, respectively. The first side frame 8 is provided so as to be movable in opposite directions, respectively, by the first side frame starting part.

 The inner side foam 14 is supported by the second side frame 16 to form the side plate inner surface 110b of the girder. Suspending means 20 allows the second side frame 16 to be suspended above the base frame 2. The suspending means starting section activates the suspending means 20 so that the second side frame 16 can be selectively positioned directly above the base frame 2.

The suspension means starting section will now be described. The second side frame 16 may be selectively installed on the base frame 2 by being installed to be movable along the rail 22 to which the suspending means 20 is attached to the ground. At the bottom of the suspending means 20, first wheels 24 rolling along the rails 22 are provided. The rail 22 is positioned at the point where the second side frame 16 is completely out of the base frame 2 (see FIGS. 3 and 9) or the second side frame 16 is located directly above the base frame 2. Installed so long as possible (see the state of FIGS. 6 and 7).

The second side frame actuating portion causes the second side frame 16 to be hinged to a position adjacent to the inner side form 14, optionally suspended in suspension by the suspending means 20. When the first side frame 8 and the base frame 2 are as close to each other as possible by the first side frame moving part, the bottom bottom foam 6 and the outer side foam 10 are in contact with each other without a gap and the bottom plate bottom of the girder ( 108a and the outer surface 110a of the side plate are formed.

The top plate of the girder may be an optional component and may be described as absorbed by the side plate. Top plate forming means for forming the top plate is formed integrally with the inner surface foam and the upper plate foam (12) to be activated together with the inner surface foam; As to close the corner portions of both upper ends of the girder may include an edge form 18 is installed on the top of the first side frame. The top plate forming means will depend on the specific shape of the top plate 112, and those skilled in the art will be able to form any number of forms depending on the shape required.

Hereinafter, the suspension means 20 will be described in detail. Suspension means 20 is a bogie 26, the first wheel 24 is installed on the bottom; A pillar body 28 which is erected in a straight direction at the rear end of the trolley 26; And a loop frame 30 installed at an upper end of the pillar body 28 so as to extend in parallel with the bogie. The bogie 26 and the loop frame 30 extend in the same direction, so that the suspension means 20 has a dichroic shape with reference to FIG. As shown in FIG. 9, the loop frame 30 takes the form of an elongated cantilever beam, and the tip of the loop frame 30 is prevented from sagging due to the weight of the loop frame 30 and the second side frame 16. Deflection prevention 32 is installed in the. The sagging prevention member 32 is supported on the upper surface of the fixture such as the base frame 2 after the formwork is coalesced. A screw 26a is also installed in the trolley 26 to selectively fix the trolley.

Each frame constituting the three-dimensional shape of the formwork of the present invention is made of H-shaped steel or L-shaped steel and the like to reduce the unit weight and increase the strength. However, the drawings are briefly expressed in the form of a quadrangular rod.

Hereinafter, the first side frame starter will be described with reference to FIGS. 3 and 6. The first side frame support 34 of the truss structure is fixed to the ground, and the first cylinder 36 is installed at the boundary between the first side frame 8 and the first side frame support 34. Rails for easy movement may be provided at the boundary between the first side frame 8 and the first side frame support 34. One side of the first cylinder 36 is subjected to the length conversion in the state connected to the first side frame (8), the other side to the first side frame support (34). As a result, the first side frame 8 is moved to the left and right in the drawing as shown in FIGS. 6 and 8 to allow selective coalescing of the bottom bottom form and the outer form. In some cases, as shown in FIG. 6, the first side frame 8 may be separated to the outside while facing slightly downward, which is a boundary between the first side frame 8 and the first side frame support 34. This can be set at an angle.

Hereinafter, the second side frame starting part will be described in detail with reference to FIGS. 3 and 6. The second side frame moving part is the upper end of the loop frame through a rotation lever 38 rotatably connected to the loop frame 30 and a bracket 40 fixed in a right triangle shape to the lower part of the roof frame 30. It is connected to 30 and the other end includes a second cylinder 42 is connected to the lower end of the rotation lever 38. According to an embodiment of the present invention, the second side frame 16 has a jointed portion, which is formed based on the hinge axis so that the distal end of the second side frame 16 does not hit the cured girder when the foam is separated. It is to transform. That is, the distal end 16a of the second side frame can move in the form of a joint by the length change of the third cylinder 46.

On the other hand, a copper plate for forming the copper surface of the girder should be installed. According to an embodiment of the present invention, the first girder is cast concrete on both sides of the copper plate, but from then on one of the copper girder to perform the function of the gold plate. Substituting the already made girders on one side of the girder is for the precise combination of girders and girders. This is an easy measure for minimizing the error of the connecting part when connecting the girders in the field. In order to make the girders function as one side of the board, it is necessary to position the girders at the front end of the base frame 2. This will be described later.

The copper plate frame 48 is for supporting the copper plate 50. The shear plate 50 is provided with a shear key forming portion 52 for forming the shear key 114 (see FIG. 2). And the pipe hole 54 for perforating the PSC steel wire is perforated. Long steel pipes are introduced into these steel holes before they are placed. This round pipe is integrated with the girder by curing.

When one girder is cured, the base frame 2 used in the girder supports the girder and is moved from the position of "A" in FIG. 5 or FIG. 9 to the position of "B". And a new base frame (2 ') is to be installed in the empty space of "A" again. In addition, the fixing bar 56 is connected between the existing base frame 2 and the newly installed base frame 2 'so that the position between each other is fixed.

According to the present invention, there is further provided a base frame moving part for moving the cured girder. The girder may be lifted up by air using a crane and then transported, but according to the present embodiment, the base frame 2 is lifted only slightly by the hydraulic jack 58 and then moved. The base frame moving part includes a girder carriage 60 in the form of a bogie that is linearly moved along the rail 22 and a lifting hydraulic jack 58 which can be changed in the vertical direction. The crane hydraulic jack 58 is installed on the upper surface of the girder transfer table 60. The girder carriage 60 includes a lower body frame 66 on which a speed reducer 62 and a second wheel 64 are installed; An upper body frame 68 mounted on the lower frame 66 to allow relative position movement; And a fourth cylinder 70 is installed to finely move the upper frame 68 to the left and right on the drawing (see the L1 section of Figs. 6 and 11) with respect to the lower frame 66. The fourth cylinder 70 is connected to the lower frame 66 on one side and the upper frame 68 on the other side through the lug. At the boundary between the upper frame 68 and the lower frame 66, friction plates are involved to allow their relative frictional movements.

The girder transfer table 60 floats the base frame 2 and the cured girder as if it were a forklift, and transports it to the right side of the drawing of FIG. The feed distance should correspond to the length of the girder.

Hereinafter, another embodiment of the present invention will be described. This embodiment is for producing a girder installed in the bridge of the curved section. First, the conceptual content will be described with reference to the plan view of FIGS. 10 to 11. Since the girder is a place where a track such as a train is placed, there is a limit in the curvature, so it does not have a large curvature as shown. That is, FIGS. 10 to 11 exaggerate the curvature and the like somewhat for ease of understanding.

 The girder 104 installed in the curved section is not an exact rectangle as shown in FIG. 10 and should be made in a substantially trapezoidal shape. The first side P1 and the second side P2 of the girder are parallel to each other, and the third side P3 has an angle of up to 4 to 5 ° with respect to the side P3 'perpendicular to the first side. α).

The present invention proposes a system capable of finely adjusting the position of each form of the formwork device to produce a girder having such a trapezoidal planar shape. 11 is a schematic representation of the relationship between the girder used in the curved portion and the formwork thereof in a plan view. It has already been mentioned that the cured girders 104 'function as a curling plate for the newly formed girders 104. The already cured girders 104 'are moved by the girder carriage 60 to the lower position in the figure of FIG. 11 (to the right in FIG. 9). Furthermore, the newly formed girders 104 and the already cured girders 104 ′ should be connected in a crooked state at a predetermined angle β. According to this, the tip 104'a of the already cured girder should be moved by the section of L1 and the outer side form 10 for forming the outer surface of one side plate of the new girder 104 should be retracted backward by the section of L2. something to do. Meanwhile, the copper plate 50 of the girder 104 to be newly formed should also undergo an angle change by the section of L3 as necessary.

The means for moving the already cured girders 104 'by the interval of L1 is the fourth cylinder 70 described above. And the means for moving the outer side foam 50 by the section of L2 is the fifth cylinder (72). One end of the fifth cylinder 72 is connected to the first side frame 8 and the other end is connected to the outer side foam 10, and three to four are installed along the height direction of the first side frame 8. In addition, the fifth cylinders 72 are respectively installed on the first side frame 8 positioned independently on both sides of the base frame. Of course, the first side frame 8 and the outer surface foam 10 are connected to allow relative flow. Relative flow is a slight slip (5 to 15 cm).

The copper plate 50 may also move as much as the section of L3 by the sixth cylinder 74. As a result, the copper plate 50 may be installed in a twisted state in an arbitrary left and right direction in the drawing of FIG. 11.

Hereinafter, an operation state will be described with reference to the accompanying drawings. 3 shows a state in which only the base frame 2 and the first side frame 8 are merged. And the copper plate frame 48 is provided in the front and rear ends of the base frame 2, respectively. The illustrated state is a state of curing the girder for the first time. In this state, a circular pipe for making the steel wire hole 116 through the copper plate 50 is installed in the pipe hole 54. And in order to mold the bottom plate 108 of the girder, the concrete is placed on the bottom bottom foam 6 to a certain thickness and placed to pass for a predetermined time.

After the bottom plate has hardened to some extent, the second side frame 16 is moved to the upper part of the base frame 2 with the suspension means starting part suspended from the suspension means 20 and positioned at the point shown in FIG. 4 ( 6, the formwork is completely coalesced by the second side frame starting part. Thereafter, the fixing rod 76 is manually installed between the second side frame 16 to fix the inner side foam 14 (see FIG. 7). And the concrete is poured to form the side plate 110 of the girder. Then, the state of FIG. 7 is obtained.

When the concrete is completely cured as time passes, the outer side foam 10 is opened to the left and right sides as shown in FIG. 8 by the first side frame starting portion, and the second side frame starting portion is the inner side foam 14. To separate. And the suspending means starting unit causes the suspending means 20 to retreat to the position shown in FIG. Thereafter, the girder carriage 60 moves under the base frame 2 to lift the base frame 2 to transfer the cured girders 104 'to the position shown in FIG. Cured girders (104 ') from now on will function as one side of the copper plate. And at the point where the base frame 2 was originally installed, a new base frame 2 'is installed to form a new girder.

Each of the cylinders 36, 42, 46, 70, 72, and 74 described above is used to encompass a hydraulic cylinder actuated by hydraulic pressure, or a screw jack length converted by mechanical means. In particular, it is more preferable for the third and sixth cylinders 46 and 74 to be screw jacks for the convenience of construction.

1 is a cross-sectional configuration of the bridge, Figure 2 is a perspective view of the girder to be provided by the formwork device of the present invention.

3 is a schematic perspective view of a formwork apparatus for forming a concrete girder for bridges according to an embodiment of the present invention.

4 to 5 are schematic perspective views of the formwork apparatus for forming concrete girder for bridges showing the working state.

6 to 8 is a front configuration diagram of the formwork apparatus according to the progress of the operation.

9 is a side configuration diagram of a formwork apparatus for forming concrete girder for bridges according to an embodiment of the present invention.

10 is a plan configuration diagram of the girder continuously installed in the curve section, Figure 11 is a schematic plan configuration diagram of the girder and the formwork device.

Explanation of symbols on the main parts of the drawings

2 ; Baseframe 6; Floor foam

8 ; First side frame 10; Outer Foam

12; Top plate 14; Inner side foam

16; Second side frame 18; Corner foam

20; Suspension means 22; rail

26; Balance 28; Column

30; Loop frame 48; Curling board frame

36,42,46,70,72,74; 1, 2, 3, 4, 5, 6 cylinder

50; Copper plate 60; Girder

104; Girder

Claims (4)

For forming a concrete girder 104 for the bridge consisting of a bottom plate (108), the side plate (110) is installed to extend symmetrically upward from both sides of the bottom plate (108); A base frame (2) spaced apart from the ground by a certain height; A bottom bottom foam (6) installed on the base frame (2) to form the bottom (108a) of the bottom plate; First side frame (8) which is installed symmetrically on both sides of the base frame (2); An outer surface foam 10 symmetrically installed inside the first side frame 8 to form an outer surface 110a of the side plate; An inner side foam 14 for forming an inner surface of the side plate; A second side frame (16) for supporting the inner side foam (14); Suspending means (20) for allowing the second side frame (16) to be suspended above the base frame (2); A second side frame starting part for allowing the second side frame 16 to be hinged to a position adjacent to the outer side surface form 10 in a suspended state by the suspending means 20; A first side frame starting part for starting the first side frame (8) to selectively adjoin both sides of the base frame (2); Suspension means starting unit for activating the suspending means 20 so that the second side frame 16 can be selectively positioned directly above the base frame 2; A copper plate 50 for forming a copper surface of the girder 104; Formwork apparatus for forming concrete girder for bridges, characterized in that it comprises a copper plate frame (48) for supporting the copper plate (50). The method of claim 1, further comprising a top plate forming means for simultaneously forming a top plate (112) integrally installed at the top of the side plate in parallel with the bottom plate for the function of the platform; The upper plate forming means is formed integrally with the inner surface form 14, the upper plate form 12 to be activated together with the inner surface form (14); Forming apparatus for forming a concrete girder for the bridge, characterized in that for closing the corners of both upper ends of the girder 104 includes a corner form (18) installed on the top of the first side frame (8) . The method of claim 1, wherein the forming foam for forming one side of the surface of the girder is to be formed by the surface of the cured girders 104 '; A girder carriage (60) for positioning the base frame (2) on which the cured girders are placed; The girder carriage 60 is installed to be movable along the rail 22 installed at the bottom of the base frame 2, and furthermore, the hydraulic jack 58 is installed at the top so that the length thereof varies in the vertical direction. Formwork for forming concrete girder for bridges, characterized in that the position can be moved after lifting). According to claim 3, The girder carriage (60) comprises a lower frame (66) in which the reducer (62) and the second wheel (64) is installed; An upper body frame 68 mounted on the lower frame 66 to allow relative position movement; And a fourth cylinder 70 having one side connected to the lower body frame 66 and the other side connected to the upper frame 68 so that the upper body frame 68 can be finely moved from side to side with respect to the lower body frame 66. Formwork for forming concrete girder for bridges.

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