Prestressed bridge self-supporting construction structure

Abstract

The utility model discloses a prestressed bridge self -supporting construction structure sets up on support platform, including outer formwork and inner formwork, the outer formwork fixed setting is at the top of support platform, the inner formwork includes scaffold, and the both sides of scaffold are connected with first board spare through side edge support subassembly setting respectively, and the top of scaffold is connected with second board spare through height adjusting subassembly setting, and the both ends of second board spare are rotatably connected with third board spare through bolt subassembly between adjacent first board spare. Through above -mentioned setting, utilize bolt subassembly and make the both ends of third board spare connect with first board spare and second board spare respectively, can to the top of first part beam body is chiseled and washed after, makes first board spare and third board spare and leaves the gap between, and the foreign matter of convenient cleaning falls between the inner formwork and outer formwork.

Description

Technical Field

[0001] This utility model belongs to the technical field of bridge construction equipment, specifically relating to a prestressed bridge self-supporting construction structure. Background Technology

[0002] Bridges are structures built to cross natural or man-made obstacles, and their main function is to connect two places so that vehicles and pedestrians can pass smoothly. Box girders are a common superstructure form in bridge engineering. Their main body is a hollow box-shaped structure, consisting of a top plate, a bottom plate, and two side webs, and they have strong bending and torsional resistance.

[0003] When constructing cast-in-place box girders, it is usually necessary to erect a support platform at the bottom and install the beam casting formwork on the top of the support platform. In the current technology, box girder casting generally adopts a layered casting method. This method applies temporary prestress to the first part of the beam that has reached the design strength, so that the first part of the beam and the support platform share the load. This reduces the load-bearing capacity requirements of the support platform, reduces the amount of material used for the support platform, and shortens the construction period for building and dismantling the support platform.

[0004] In actual construction, the inner and outer formwork of the pouring formwork are usually erected in one go. Before the second pouring, the formwork surface needs to be washed and the surface of the first part of the beam needs to be roughened to remove loose stones. However, the foreign objects generated by washing and roughening are easy to fall into the gap between the inner and outer formwork and are difficult to clean. Utility Model Content

[0005] The present invention aims to provide a self-supporting construction structure for prestressed bridges to solve the problem in the prior art of cleaning foreign objects between the inner and outer formwork before the second pour when the box girder is poured in layers.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A prestressed bridge self-supporting construction structure, set on a support platform, includes an outer formwork and an inner formwork frame. The outer formwork is fixedly set on the top of the support platform. The inner formwork frame includes a scaffold. First plates are connected to both sides of the scaffold via side support components. A second plate is connected to the top of the scaffold via a height adjustment component. A third plate is rotatably connected to the two ends of the second plate and the adjacent first plate via pin components. Fixed shafts are provided at both ends of the third plate, and insertion holes are provided at both ends of the fixed shafts. The pin components include pins that slide into the insertion holes. Connecting seats are fixedly set on both sides of the first and second plates near the third plate. Limiting holes are provided on the connecting seats opposite to the insertion holes.

[0008] The principle and effects of this technical solution:

[0009] During construction, the outer formwork is first erected on the support platform, and the bottom plate and web reinforcement are tied to the top of the outer formwork. Then, the inner formwork frame is erected on the top of the outer formwork, and corrugated pipes are embedded between the outer formwork and the inner formwork frame. When pouring the first part of the beam, its upper edge is positioned within the horizontal projection of the third plate. After the strength of the first part of the beam reaches the design value, temporary prestress is applied using the corrugated pipes. Then, the top of the first part of the beam is roughened, and the top of the inner formwork frame is flushed. At this time, the pin assembly is released from the connection between the third plate and the first plate, and foreign objects are flushed out through the gap between the third plate and the first plate. After the cleaning work is completed, the pin assembly is used again to connect the third plate and the first plate.

[0010] With the above setup, the two ends of the third plate are connected to the first and second plates respectively by the pin assembly. After the top of the first beam is roughened and washed, a gap is left between the first and third plates, which facilitates the removal of foreign objects that fall between the inner mold frame and the outer mold.

[0011] In this invention, a first connecting plate and a second connecting plate are fixedly arranged at intervals on the side of the first plate near the scaffold. The scaffold includes a first horizontal bar and a second horizontal bar arranged at intervals. The side support assembly includes a first telescopic member, a second telescopic member, and a third telescopic member. The two ends of the first telescopic member are rotatably connected to the ends of the first connecting plate and the first horizontal bar, respectively. The two ends of the second telescopic member are rotatably connected to the ends of the second connecting plate and the first horizontal bar, respectively. The two ends of the third telescopic member are rotatably connected to the ends of the second connecting plate and the second horizontal bar, respectively. Through this arrangement, the installation position of the first plate can be adjusted by adjusting the overall length of the first, second, and third telescopic members, and the first plate can be fixed after being adjusted to the appropriate position.

[0012] In this invention, a support frame is fixedly installed at the bottom of the second plate. The height adjustment assembly includes a threaded rod slidably inserted into the top of the scaffold. A U-shaped frame that mates with the support frame is fixedly installed at the top of the threaded rod. A support plate is fitted onto the outer wall of the threaded rod, and the bottom of the support plate abuts against the top of the scaffold. Through this arrangement, by rotating the support plate, the distance between the U-shaped frame and the support plate can be adjusted, thereby adjusting the height of the U-shaped frame and ultimately achieving the purpose of adjusting the installation height of the second plate.

[0013] In this invention, the side walls of the support frame are provided with through mounting holes spaced apart, and the two inner side walls of the U-shaped frame are symmetrically provided with transversely arranged through slots. After the bolt members are passed through the through slots and mounting holes in sequence, lock nuts are fitted onto the ends of the bolt members until the bolt caps and lock nuts respectively press against the two sides of the U-shaped frame. Through the above arrangement, the horizontal installation position of the second plate can be finely adjusted.

[0014] In this invention, a through groove is formed on the inner sidewall of the insertion hole, and a lever that slides through the groove is fixedly provided on the outer sidewall of the pin. This design allows the operator to easily slide the pin.

[0015] In this invention, the pin assembly further includes a compression spring, which is disposed within the insertion hole between the pin and the end wall of the insertion hole. This arrangement utilizes the spring force to push the pin outward, ensuring that the pin remains continuously inserted into the limiting hole during use.

[0016] In this invention, side plates are fixedly installed at both ends of the first, second, and third plates near the scaffold side, and each side plate has through holes spaced apart. This arrangement allows fastening bolts to pass through two adjacent through holes, enhancing the connection strength of the device. Attached Figure Description

[0017] Figure 1 This is an isometric view of the overall structure of this utility model;

[0018] Figure 2 This utility model provides a partially magnified isometric view. Figure 1 ;

[0019] Figure 3 This utility model provides a partially magnified isometric view. Figure 2 ;

[0020] Figure 4 This is an exploded view of some components of this utility model. Detailed Implementation

[0021] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments:

[0022] The reference numerals in the accompanying drawings include: 10, outer template; 20, scaffolding; 21, first horizontal bar; 22, second horizontal bar; 30, first plate; 31, first connecting plate; 32, second connecting plate; 40, second plate; 41, support frame; 42, mounting hole; 50, third plate; 51, fixed shaft; 52, insertion hole; 53, connecting seat; 54, limiting hole; 55, sliding groove; 61, pin; 62, lever; 63, compression spring; 71, first telescopic rod; 72, second telescopic rod; 73, third telescopic rod; 81, threaded rod; 82, U-shaped frame; 821, through groove; 83, support plate; 90, side plate; 91, through hole; 100, first part of the beam.

[0023] Example:

[0024] As attached Figure 1-4 As shown, this utility model discloses a prestressed bridge self-supporting construction structure, set on a support platform (not shown in the figure), including an outer formwork 10 and an inner formwork frame. The outer formwork 10 is fixedly set on the top of the support platform by a cup-buckle bracket (not shown in the figure). The inner formwork frame includes a scaffold 20. The two sides of the scaffold 20 are respectively connected to a first plate 30 by a side support assembly. The top of the scaffold 20 is connected to a second plate 40 by a height adjustment assembly. The two ends of the second plate 40 are respectively rotatably connected to the adjacent first plate 30 by a pin assembly. The two ends of the third plate 50 are respectively provided with a fixed shaft 51. The two ends of the fixed shaft 51 are respectively provided with a insertion hole 52. The pin assembly includes a pin 61 that slides into the insertion hole 52. The first plate 30 and the second plate 40 are respectively fixedly set with a connecting seat 53 on both sides near the end of the third plate 50. The connecting seat 53 is provided with a limiting hole 54 opposite to the insertion hole 52.

[0025] In this embodiment, the first plate 30 is fixedly provided with a first connecting plate 31 and a second connecting plate 32 at intervals on the side near the scaffold 20. The scaffold 20 includes a first horizontal bar 21 and a second horizontal bar 22 arranged at intervals. The side support assembly includes a first telescopic rod 71, a second telescopic rod 72, and a third telescopic rod 73. The two ends of the first telescopic rod 71 are rotatably connected to the ends of the first connecting plate 31 and the first horizontal bar 21, respectively. The two ends of the second telescopic rod 72 are rotatably connected to the ends of the second connecting plate 32 and the first horizontal bar 21, respectively. The two ends of the third telescopic rod 73 are rotatably connected to the ends of the second connecting plate 32 and the second horizontal bar 22, respectively. Each telescopic rod includes a bidirectional screw and a sleeve fitted at both ends of the bidirectional screw. The end of the sleeve is rotatably connected to the adjacent first plate 30, first horizontal bar 21, or second horizontal bar 22.

[0026] In this embodiment, a support frame 41 is fixedly provided at the bottom of the second plate 40. The height adjustment component includes a threaded rod 81 that is slidably inserted into the top of the scaffold 20. A U-shaped frame 82 that cooperates with the support frame 41 is fixedly provided at the top of the threaded rod 81. A support plate 83 is fitted on the outer side wall of the threaded rod 81. The bottom of the support plate 83 abuts against the top of the scaffold 20.

[0027] In this embodiment, the sidewalls of the support frame 41 are provided with through mounting holes 42 at intervals, and the two inner sidewalls of the U-shaped frame 82 are symmetrically provided with transversely arranged through slots 821.

[0028] In this embodiment, the inner sidewall of the insertion hole 52 is provided with a through groove 55, and the outer sidewall of the pin 61 is fixedly provided with a lever 62 that slides through the groove 55.

[0029] In this embodiment, the pin assembly further includes a compression spring 63, which is disposed within the insertion hole 52 between the pin 61 and the end wall of the insertion hole 52.

[0030] In this embodiment, side plates 90 are fixedly installed at both ends of the first plate 30, the second plate 40 and the third plate 50 near the scaffold 20, and through holes 91 are spaced apart on the side plates 90.

[0031] The specific implementation process is as follows:

[0032] During construction, the outer formwork 10 is first erected on the support platform, and the bottom plate and web reinforcement are tied to the top of the outer formwork 10. Then, the inner formwork frame is erected on the top of the outer formwork 10, and corrugated pipes are embedded between the outer formwork 10 and the inner formwork frame. When pouring the first part of the beam 100, its upper edge is positioned within the horizontal projection of the third plate 50. After the strength of the first part of the beam 100 reaches the design value, temporary prestress is applied using the corrugated pipes. Then, the top of the first part of the beam 100 is roughened, and the top of the inner formwork frame is washed. At this time, the connection between the pin assembly and the third plate 50 and the first plate 30 is released, and foreign objects are flushed out through the gap between the third plate 50 and the first plate 30. After the cleaning work is completed, the pin assembly is used again to connect the third plate 50 and the first plate 30.

[0033] The parts of the device not covered herein are the same as or can be implemented using existing technologies.

[0034] The above descriptions are merely embodiments of this utility model. Commonly known technical solutions or characteristics are not described in detail here. It should be noted that those skilled in the art can make various modifications and improvements without departing from the technical solution of this utility model. These modifications and improvements should also be considered within the scope of protection of this utility model, and will not affect the effectiveness of the implementation of this utility model or the practicality of the patent. The scope of protection claimed in this application should be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. A self-supporting construction structure for prestressed bridges, mounted on a support platform, characterized in that, include: The outer template is fixedly installed on the top of the support platform; An inner mold frame, comprising a scaffold, with first plates connected to both sides of the scaffold via side support components, and a second plate connected to the top of the scaffold via a height adjustment component. The two ends of the second plate are rotatably connected to the adjacent first plate via pin components. The third plate is provided with a fixed shaft at both ends, and the fixed shaft is provided with a insertion hole at both ends. The pin assembly includes a pin that is slidably inserted into the insertion hole. The first plate and the second plate are respectively provided with connecting seats on both sides near the end of the third plate. The connecting seats are provided with limiting holes opposite to the insertion holes.

2. The prestressed bridge self-supporting construction structure as described in claim 1, characterized in that: The first plate is fixedly provided with a first connecting plate and a second connecting plate at intervals on the side near the scaffold. The scaffold includes a first horizontal bar and a second horizontal bar arranged at intervals. The side support assembly includes a first telescopic member, a second telescopic member, and a third telescopic member. The two ends of the first telescopic member are rotatably connected to the ends of the first connecting plate and the first horizontal bar, respectively. The two ends of the second telescopic member are rotatably connected to the ends of the second connecting plate and the first horizontal bar, respectively. The two ends of the third telescopic member are rotatably connected to the ends of the second connecting plate and the second horizontal bar, respectively.

3. The prestressed bridge self-supporting construction structure as described in claim 1, characterized in that: The bottom of the second plate is fixedly provided with a support frame. The height adjustment component includes a threaded rod that is slidably inserted into the top of the scaffold. The top of the threaded rod is fixedly provided with a U-shaped frame that cooperates with the support frame. The outer side wall of the threaded rod is fitted with a support plate. The bottom of the support plate abuts against the top of the scaffold.

4. The prestressed bridge self-supporting construction structure as described in claim 3, characterized in that: The side walls of the support frame are provided with through mounting holes at intervals, and the two inner side walls of the U-shaped frame are symmetrically provided with through slots arranged in the transverse direction.

5. The prestressed bridge self-supporting construction structure as described in claim 1, characterized in that: The inner wall of the insertion hole is provided with a through groove, and the outer wall of the pin is fixedly provided with a lever that slides through the groove.

6. The prestressed bridge self-supporting construction structure as described in claim 5, characterized in that: The pin assembly also includes a compression spring, which is disposed within the insertion hole between the pin and the end wall of the insertion hole.

7. The prestressed bridge self-supporting construction structure as described in claim 1, characterized in that: Side plates are fixedly installed at both ends of the first plate, the second plate and the third plate near the scaffold, and through holes are spaced apart on each side plate.

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