Pi-shaped steel-concrete composite beam top plate manufacturing method

Abstract

The invention provides a manufacturing die for a top plate of a steel-concrete composite beam shaped like a Pi. The manufacturing die is used for manufacturing the top plate of the steel-concrete composite beam shaped like the Pi. The process of manufacturing the bridge top plate comprises the steps that the left steel beam and the right steel beam are well installed, the manufacturing mold of the steel-concrete composite beam top plate shaped like the Chinese character'pi 'is well assembled, and therefore a bridge deck plate cavity is formed, a steel bar framework is built in the bridge deck plate cavity, concrete is poured into the bridge deck plate cavity, and the steel bars are poured after the concrete is solidified, so that the bridge deck plate is formed. And the manufacturing method of the top plate of the Pi-shaped steel-concrete composite beam is removed, the bridge deck is left, and the left steel beam and the right steel beam form the Pi-shaped steel-concrete composite beam. The mold has the advantage that the concrete does not easily smudge the lower surface of the top plate of the steel beam, and the problem that the construction cost is increased due to the fact that the concrete pollutes the lower surface of the top plate when an existing mold is used for pouring the inverted-U-shaped steel-concrete composite beam top plate is solved.

Description

Technical Field

[0001] The invention relates to the technical field of bridge construction, and in particular to a method for manufacturing a top plate of a vaulted steel-concrete composite beam. Background Art

[0002] During the construction of the bridge, the arched steel-concrete composite beam will be prefabricated, and then the arched steel-concrete composite beam will be hoisted onto the bridge pier. The arched steel-concrete composite beam includes a bridge deck of concrete structure, a left steel beam and a right steel beam, the lower surface of the bridge deck is provided with a left convex strip and a right convex strip extending in the longitudinal direction of the bridge, the left steel beam and the right steel beam are distributed along the transverse direction and extend in the longitudinal direction of the bridge, the left steel beam includes a left top plate, a left vertical plate and a left bottom plate, the left top plate, the left vertical plate and the left bottom plate are connected together in an "I" shape, and the left top plate is fixed on the lower surface of the left convex strip, the right steel beam includes a right top plate, a right vertical plate and a right bottom plate, the right top plate, the right vertical plate and the right bottom plate are connected together in an "I" shape, and the right top plate is fixed on the lower surface of the right convex strip. The existing prefabricated v-shaped steel-concrete composite beam top plate is a mold that also wraps the steel beam, which will cause concrete to penetrate and pollute the lower surfaces of the left and right top plates. When the lower surface of the top plate is treated for corrosion in the later stage, the concrete on the lower surface of the top plate needs to be removed, which increases the construction cost. Summary of the invention

[0003] The present invention aims to provide a method for manufacturing a top plate of a steel-concrete composite beam in which concrete is not easy to contaminate the lower surface of the top plate of the steel beam, thereby solving the problem that when the top plate of the steel-concrete composite beam is cast in an existing mold, concrete contaminates the lower surface of the top plate, resulting in increased construction costs.

[0004] In order to achieve the above-mentioned invention object, the present invention adopts the following technology: a method for manufacturing a top plate of a v-shaped steel-concrete composite beam, the v-shaped steel-concrete composite beam comprises a bridge deck of a concrete structure, a left steel beam and a right steel beam, the lower surface of the bridge deck is provided with a left convex strip and a right convex strip extending in the longitudinal bridge direction, the left steel beam and the right steel beam are distributed in the transverse bridge direction and extend in the longitudinal bridge direction, the left steel beam comprises a left top plate, a left vertical plate and a left bottom plate, the left top plate, the left vertical plate and the left bottom plate are connected together in an "I" shape, the left top plate is fixed on the lower surface of the left convex strip, the right steel beam comprises a right top plate, a right vertical plate and a right bottom plate, the right top plate, the right vertical plate and the right bottom plate are connected together in an "I" shape, the right top plate is fixed on the lower surface of the right convex strip, and is characterized in that it is completed by a v-shaped steel-concrete composite beam top plate manufacturing mold, the v-shaped steel-concrete composite beam top plate manufacturing mold comprises a left mold, a middle mold and a right mold distributed in the transverse bridge direction, the left The vertical plate is located between the left mold and the middle mold, the right vertical plate is located between the right mold and the middle mold, the left mold includes a left mold and a left mold chassis supporting the left mold, the right mold includes a right mold and a right mold chassis supporting the right mold, the middle mold includes a middle mold and a middle mold chassis supporting the middle mold, the left mold, the left top plate, the middle mold, the right top plate and the right mold form a bridge deck cavity for casting the bridge deck; the process of making the bridge top plate is to install the left steel beam and the right steel beam, assemble the top plate making mold of the steel-concrete composite beam to form a bridge deck cavity, build a steel skeleton in the bridge deck cavity, pour concrete into the bridge deck cavity, pour the steel bars after the concrete is solidified to form a bridge deck, remove the top plate making method of the steel-concrete composite beam, and leave the bridge deck, the left steel beam and the right steel beam to form the steel-concrete composite beam. The steel beam can be used as part of the mold.

[0005] Preferably, the left side surface of the left convex strip, the right side surface of the left convex strip, the left side surface of the right convex strip and the right side surface of the right convex strip are all inclined surfaces inclined downward, the intermediate template includes a middle support plate, a left support plate whose right end is hinged to the middle support plate, and a right support plate whose left end is hinged to the middle support plate, the middle support plate is fixed to the upper end of the intermediate mold chassis, the left end of the left support plate is hinged to the upper end of the left push-pull cylinder, the lower end of the left push-pull cylinder is hinged to the intermediate mold chassis, the left support plate is used to form the right side surface of the left convex strip, the right end of the right support plate is hinged to the upper end of the right push-pull cylinder, the lower end of the right push-pull cylinder is hinged to the intermediate mold chassis, and the right support plate is used to form the left side surface of the right convex strip; when demoulding, the left support plate is first disengaged by the contraction of the left push-pull cylinder and the right support plate is disengaged by the contraction of the right push-pull cylinder, so that demoulding is more labor-saving and convenient.

[0006] Preferably, the intermediate mold chassis includes a bracket, a plurality of lifting cylinders supporting the bracket and a top frame arranged on the bracket, the middle support plate is fixed on the upper end of the top frame, and the lower ends of the left push-pull cylinder and the right push-pull cylinder are hinged on the top frame or the bracket; during the demoulding process, when the left and right support plates are disengaged, the lifting cylinder contracts to disengage the middle support plate, further improving the convenience and labor saving during demoulding.

[0007] Preferably, when the left support plate is connected to the left top plate, the left top plate abuts against the upper surface of the left support plate, and when the right support plate is connected to the right top plate, the right top plate abuts against the upper surface of the right support plate. This can increase the area of ​​the bridge deck wrapping the left bottom plate and the right top plate, thereby reducing the amount of subsequent anti-corrosion treatment of the left and right steel beams. This reduces the construction cost.

[0008] Preferably, the left side template includes a left middle supporting plate, a left baffle plate connected to the left end of the left middle supporting plate, and a right supporting plate connected to the right end of the left middle supporting plate, and the right supporting plate is used to form the left side surface of the left convex strip; the right side template includes a right middle supporting plate, a right baffle plate connected to the right end of the right middle supporting plate, and a left supporting plate connected to the left end of the middle supporting plate, and the left supporting plate is used to form the right side surface of the right convex strip.

[0009] Preferably, when the right supporting plate is connected to the left top plate, the left top plate abuts against the upper surface of the right supporting plate; when the left supporting plate is connected to the right top plate, the right top plate abuts against the upper surface of the left supporting plate. This can increase the area of ​​the bridge deck wrapping the left bottom plate and the right top plate, thereby reducing the amount of subsequent anti-corrosion treatment of the left and right steel beams. This reduces the construction cost.

[0010] Preferably, the left mold further includes a left slide rail and a left telescopic mechanism, the right end of the left slide rail is higher than the left end, the left mold chassis is slidably connected to the left slide rail, and the left telescopic mechanism is used to drive the left mold chassis to move on the left slide rail; the right mold further includes a right slide rail and a right telescopic mechanism, the left end of the right slide rail is higher than the right end, the right mold chassis is slidably connected to the right slide rail, and the right telescopic mechanism is used to drive the right mold chassis to move on the right slide rail; when demoulding, the telescopic mechanism is used to drive the left and right molds to move obliquely to achieve disengagement. The mold is opened by pulling down obliquely, thereby reducing the impact on the bridge deck during mold opening and making mold opening more labor-saving.

[0011] Preferably, the left telescopic mechanism is a left oil cylinder, the left bottom plate is supported on the left bottom frame, one end of the left oil cylinder is hinged to the left mold bottom frame, and the other end is hinged to the left bottom frame; the right telescopic mechanism is a right oil cylinder, the right bottom plate is supported on the right bottom frame, one end of the right oil cylinder is hinged to the right mold bottom frame, and the other end is hinged to the right bottom frame. The structure is simple and practical.

[0012] Preferably, a "T"-shaped left slide groove is provided at the lower end of the left mold chassis, the left side slide rail includes a left slide rail part slide plate and a left slide rail connecting plate connected to the middle of the lower surface of the left slide rail part slide rail, the supporting slide rail part slide rail is inserted into the left slide groove and slides with the left slide groove and hooks together; a "T"-shaped right slide groove is provided at the lower end of the right mold chassis, the right side slide rail includes a right slide rail part slide plate and a right slide rail connecting plate connected to the middle of the lower surface of the right slide rail part slide rail, the supporting slide rail part slide rail is inserted into the right slide groove and slides with the right slide groove and hooks together. It can improve the reliability during sliding and will not cause derailment.

[0013] Beneficial effects: good reliability during hoisting, low hoisting cost, and less damage to the arched steel-concrete composite beam. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 A schematic diagram of a structure for making a mold for the top plate of a steel-concrete composite beam; Figure 2 for Figure 1 A local enlarged schematic diagram of point A; Figure 3 A schematic diagram of another structure for making a mold for the top plate of a steel-concrete composite beam; Figure 4 for Figure 3 A local enlarged schematic diagram of point B.

[0015] In the figure: bridge deck 1, left steel beam 2, right steel beam 3, left convex strip 4, right convex strip 5, left top plate 6, left vertical plate 7, left bottom plate 8, right top plate 9, right vertical plate 10, right bottom plate 11, left formwork 12, left mold chassis 13, left middle supporting plate 14, left baffle 15, right supporting plate 16, left chassis 17, right formwork 18, right mold chassis 19, right middle supporting plate 20, right baffle 21, left supporting plate 22, right chassis 23 , middle template 24, middle mold base frame 25, middle tray 26, left tray 27, right tray 28, left push-pull cylinder 29, right push-pull cylinder 30, bracket 31, lifting cylinder 32, top frame 33, left slide rail 34, left telescopic mechanism 35, left slide groove 36, left slide rail slide plate 37, left slide rail connecting plate 38, right telescopic mechanism 39, right slide groove 40, right slide rail slide plate 41, right slide rail connecting plate 42, right slide rail 43. DETAILED DESCRIPTION

[0016] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0017] Example 1, see Figure 1 and Figure 2 , a method for manufacturing a top plate of a v-shaped steel-concrete composite beam is completed by a mold for manufacturing a top plate of a v-shaped steel-concrete composite beam. The v-shaped steel-concrete composite beam includes a bridge deck 1 of a concrete structure, a left steel beam 2 and a right steel beam 3. A left convex strip 4 and a right convex strip 5 extending in the longitudinal direction of the bridge are provided on the lower surface of the bridge deck. The left steel beam and the right steel beam are distributed along the transverse direction and extend in the longitudinal direction of the bridge. The left steel beam includes a left top plate 6, a left vertical plate 7 and a left bottom plate 8. The left top plate, the left vertical plate and the left bottom plate are connected together in an "I" shape. The left top plate is fixed on the lower surface of the left convex strip. The right steel beam includes a right top plate 9, a right vertical plate 10 and a right bottom plate 11. The right top plate, the right vertical plate and the right bottom plate are connected together in an "I" shape. The right top plate is fixed on the lower surface of the right convex strip. The left side surface of the left convex strip, the right side surface of the left convex strip, the left side surface of the right convex strip and the right side surface of the right convex strip are all inclined surfaces inclined downward.

[0018] The mold for making the top plate of the v-shaped steel-concrete composite beam includes a left mold, a middle mold and a right mold distributed along the transverse bridge direction. The left vertical plate is located between the left mold and the middle mold, and the right vertical plate is located between the right mold and the middle mold. The left mold includes a left template 12 and a left mold base frame 13 supporting the left template. The left template includes a left middle supporting plate 14, a left baffle plate 15 connected to the left end of the left middle supporting plate, and a right supporting plate 16 connected to the right end of the left middle supporting plate. The right supporting plate is used to form the left side of the left convex strip. When the right supporting plate is connected to the left top plate, the left top plate abuts on the upper surface of the right supporting plate. The left bottom plate is supported on the left base frame 17. The right mold includes a right template 18 and a right mold base frame 19 supporting the right template. The right template includes a right middle supporting plate 20, a right baffle plate 21 connected to the right end of the right middle supporting plate, and a left supporting plate 22 connected to the left end of the middle supporting plate. The left supporting plate is used to form the right side of the right convex strip. When the left supporting plate is connected to the right top plate, the right top plate abuts against the upper surface of the left supporting plate. The right bottom plate is supported on the right bottom frame 23. The intermediate mold includes an intermediate template 24 and an intermediate mold bottom frame 25 supporting the intermediate template. The intermediate template includes a middle supporting plate 26, a left supporting plate 27 whose right end is hinged to the middle supporting plate, and a right supporting plate 28 whose left end is hinged to the middle supporting plate. The middle supporting plate is fixed to the upper end of the bottom frame of the intermediate mold. The left end of the left supporting plate is hinged to the upper end of the left push-pull cylinder 29, and the lower end of the left push-pull cylinder is hinged to the bottom frame of the intermediate mold. The left supporting plate is used to form the right side surface of the left convex strip, the right end of the right supporting plate is hinged to the upper end of the right push-pull cylinder 30, and the lower end of the right push-pull cylinder is hinged to the bottom frame of the intermediate mold. The right supporting plate is used to form the left side surface of the right convex strip. The left side formwork, the left top plate, the middle formwork, the right top plate and the right side formwork form a bridge deck cavity for casting the bridge deck; when the left support plate is connected to the left top plate, the left top plate abuts against the upper surface of the left support plate, and when the right support plate is connected to the right top plate, the right top plate abuts against the upper surface of the right support plate.

[0019] The process of making the bridge top plate is to install the left steel beam and the right steel beam, assemble the method for making the top plate of the steel-concrete composite beam to form a bridge deck cavity, build a steel skeleton in the bridge deck cavity, pour concrete into the bridge deck cavity, pour the steel bars after the concrete solidifies to form the bridge deck, remove the method for making the top plate of the steel-concrete composite beam, and leave the bridge deck, the left steel beam and the right steel beam to form the steel-concrete composite beam. When demoulding, the left support plate is disengaged by contracting the left push-pull cylinder and the right support plate is disengaged by contracting the right push-pull cylinder.

[0020] Embodiment 2 is different from Embodiment 1 in that: See also Figure 3 and Figure 4The middle mold chassis includes a bracket 31, a plurality of lifting cylinders 32 supporting the bracket and a top frame 33 arranged on the bracket. The middle support plate is fixed on the upper end of the top frame. The lower ends of the left push-pull cylinder and the lower ends of the right push-pull cylinder are hinged on the top frame or the bracket. When the left and right support plates are disengaged during demoulding, the lifting cylinder contracts to disengage the middle support plate. The left mold also includes a left slide rail 34 and a left telescopic mechanism 35. The right end of the left slide rail is higher than the left end. The left mold chassis is slidably connected to the left slide rail. Specifically: a "T"-shaped left slide groove 36 is provided at the lower end of the left mold chassis. The left slide rail includes a left slide rail slide plate 37 and a left slide rail connecting plate 38 connected to the middle of the lower surface of the left slide rail slide plate. The slide rail slide plate is inserted into the left slide groove and slides with the left slide groove and is hooked together. The left telescopic mechanism is used to drive the left mold chassis to move on the left slide rail. Specifically, the left telescopic mechanism is a left oil cylinder. One end of the left oil cylinder is hinged to the left mold chassis, and the other end is hinged to the left chassis. The right mold also includes a right slide rail 43 and a right telescopic mechanism 39. The left end of the right slide rail is higher than the right end. The right mold chassis is slidably connected to the right slide rail. Specifically, a "T"-shaped right slide groove 40 is provided at the lower end of the right mold chassis. The right slide rail includes a right slide rail slide plate 41 and a right slide rail connecting plate 42 connected to the middle of the lower surface of the right slide rail slide plate. The slide rail slide plate is inserted into the right slide groove and slides and hooks with the right slide groove. The right telescopic mechanism is used to drive the right mold chassis to move on the right slide rail. Specifically, the right telescopic mechanism is a right oil cylinder. One end of the right oil cylinder is hinged to the right mold chassis, and the other end is hinged to the right chassis.

[0021] When demoulding, the left and right molds are tilted and moved by the telescopic mechanism to achieve disengagement.

[0022] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0023] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A method for manufacturing a top plate of a v-shaped steel-concrete composite beam, wherein the v-shaped steel-concrete composite beam comprises a bridge deck of a concrete structure, a left steel beam and a right steel beam, wherein a left convex strip and a right convex strip extending in the longitudinal direction of the bridge are arranged on the lower surface of the bridge deck, wherein the left steel beam and the right steel beam are distributed in the transverse direction of the bridge and extend in the longitudinal direction of the bridge, wherein the left steel beam comprises a left top plate, a left vertical plate and a left bottom plate, wherein the left top plate, the left vertical plate and the left bottom plate are connected together in an "I" shape, wherein the left top plate is fixed on the lower surface of the left convex strip, wherein the right steel beam comprises a right top plate, a right vertical plate and a right bottom plate, wherein the right top plate, the right vertical plate and the right bottom plate are connected together in an "I" shape, wherein the right top plate is fixed on the lower surface of the right convex strip, wherein the The process is completed by making a mold for the top plate of a v-shaped steel-concrete composite beam, which includes a left mold, a middle mold and a right mold distributed along the transverse direction of the bridge, a left vertical plate is located between the left mold and the middle mold, and the right vertical plate is located between the right mold and the middle mold. The left mold includes a left template and a left mold chassis supporting the left template, the right mold includes a right template and a right mold chassis supporting the right template, and the middle mold includes an intermediate template and an intermediate mold chassis supporting the intermediate template. The left template, the left top plate, the middle template, the right top plate and the right template form a bridge deck cavity for casting the bridge deck; the process of making the bridge top plate is to install the left steel beam and the right steel beam, assemble the mold for making the top plate of the v-shaped steel-concrete composite beam to form a bridge deck cavity, build a steel skeleton in the bridge deck cavity, pour concrete into the bridge deck cavity, pour the steel bars after the concrete is solidified to form a bridge deck, and remove the manufacturing method of the top plate of the v-shaped steel-concrete composite beam, leaving the bridge deck, the left steel beam and the right steel beam to form the v-shaped steel-concrete composite beam.

2. The method for manufacturing the top plate of a steel-concrete composite beam according to claim 1, characterized in that: The left side surface of the left convex strip, the right side surface of the left convex strip, the left side surface of the right convex strip and the right side surface of the right convex strip are all downwardly inclined surfaces, the intermediate template includes a middle support plate, a left support plate whose right end is hinged to the middle support plate, and a right support plate whose left end is hinged to the middle support plate, the middle support plate is fixed to the upper end of the intermediate mold base, the left end of the left support plate is hinged to the upper end of the left push-pull cylinder, the lower end of the left push-pull cylinder is hinged to the intermediate mold base, the left support plate is used to form the right side surface of the left convex strip, the right end of the right support plate is hinged to the upper end of the right push-pull cylinder, the lower end of the right push-pull cylinder is hinged to the intermediate mold base, and the right support plate is used to form the left side surface of the right convex strip; when demolding, the left support plate is first disengaged by contraction of the left push-pull cylinder and the right support plate is disengaged by contraction of the right push-pull cylinder.

3. The method for manufacturing the top plate of a steel-concrete composite beam according to claim 2, characterized in that: The intermediate mold base frame includes a bracket, a plurality of lifting cylinders supporting the bracket and a top frame arranged on the bracket, the middle support plate is fixed on the upper end of the top frame, and the lower ends of the left push-pull cylinder and the right push-pull cylinder are hinged on the top frame or the bracket; during the demoulding process, when the left support plate and the right support plate are disengaged, the lifting cylinder contracts to disengage the middle support plate.

4. A method for manufacturing a top plate of a steel-concrete composite beam according to claim 2 or 3, characterized in that: When the left support plate is connected to the left top plate, the left top plate abuts against the upper surface of the left support plate, and when the right support plate is connected to the right top plate, the right top plate abuts against the upper surface of the right support plate.

5. A method for manufacturing a top plate of a steel-concrete composite beam according to claim 2 or 3, characterized in that: The left side template includes a left middle supporting plate, a left baffle plate connected to the left end of the left middle supporting plate, and a right supporting plate connected to the right end of the left middle supporting plate, and the right supporting plate is used to form the left side surface of the left convex strip; the right side template includes a right middle supporting plate, a right baffle plate connected to the right end of the right middle supporting plate, and a left supporting plate connected to the left end of the middle supporting plate, and the left supporting plate is used to form the right side surface of the right convex strip.

6. The method for manufacturing the top plate of a steel-concrete composite beam according to claim 5, characterized in that: When the right supporting plate is connected to the left top plate, the left top plate abuts against the upper surface of the right supporting plate; when the left supporting plate is connected to the right top plate, the right top plate abuts against the upper surface of the left supporting plate.

7. The method for manufacturing the top plate of a steel-concrete composite beam according to claim 6, characterized in that: The left mold also includes a left slide rail and a left telescopic mechanism, the right end of the left slide rail is higher than the left end, the left mold base is slidably connected to the left slide rail, and the left telescopic mechanism is used to drive the left mold base to move on the left slide rail; the right mold also includes a right slide rail and a right telescopic mechanism, the left end of the right slide rail is higher than the right end, the right mold base is slidably connected to the right slide rail, and the right telescopic mechanism is used to drive the right mold base to move on the right slide rail; when demolding, the telescopic mechanism is used to drive the left and right molds to tilt and move to achieve disengagement through the telescopic movement of the telescopic mechanism.

8. The method for manufacturing the top plate of a steel-concrete composite beam according to claim 7, characterized in that: The left telescopic mechanism is a left oil cylinder, the left bottom plate is supported on the left base frame, one end of the left oil cylinder is hinged to the left mold base frame, and the other end is hinged to the left base frame; the right telescopic mechanism is a right oil cylinder, the right bottom plate is supported on the right base frame, one end of the right oil cylinder is hinged to the right mold base frame, and the other end is hinged to the right base frame.

9. The method for manufacturing the top plate of a vaulted steel-concrete composite beam according to claim 7, characterized in that: A "T"-shaped left slide groove is provided at the lower end of the left mold chassis, and the left side slide rail includes a left slide rail portion slide plate and a left slide rail connecting plate connected to the middle of the lower surface of the left slide rail portion slide plate, and the supporting slide rail portion slide plate is inserted into the left slide groove and slides with the left slide groove and is hooked together; a "T"-shaped right slide groove is provided at the lower end of the right mold chassis, and the right side slide rail includes a right slide rail portion slide plate and a right slide rail connecting plate connected to the middle of the lower surface of the right slide rail portion slide plate, and the supporting slide rail portion slide plate is inserted into the right slide groove and slides with the right slide groove and is hooked together.

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