Flexible closed sliding and guiding device for bridge side span closure

Abstract

Disclosed in the present invention is a flexible closed sliding and guiding device for bridge side span closure, comprising a sliding system, wherein the sliding system is provided with a bottom formwork and an upper formwork which are parallel to each other from bottom to top. Flexible sealing strips are arranged on two opposite sides of the bottom formwork, so that a flexible closed cavity containing lubricating oil is formed between the bottom formwork and the upper formwork; two sets of guiding side formworks are arranged on the two sides of the sliding system close to the flexible sealing strips; two sides of the bottom formwork are respectively connected to the bottoms of the two sets of guiding side formworks; two sides of the upper formwork respectively abut against the inner walls of the two sets of guiding side formworks; a balanced weight span beam section is poured between the top of the upper formwork and the two sets of guiding side formworks. In the flexible closed sliding and guiding device for bridge side span closure of the present invention, the construction formwork of the balanced weight span beam section is fully utilized, so that the sliding of a closed surface is realized between the balanced weight span beam section and the bottom formwork, and the bridge side span closure process is realized by means of the guiding of the side formworks, thereby effectively improving the working efficiency.

Description

Flexible closed sliding and guiding device for bridge side span closure Technical Field

[0001] The present invention relates to the technical field of bridge construction, and more particularly to a flexible closed sliding and guiding device for closing a side span of a bridge. Background Art

[0002] A cable-stayed bridge consists of cables, towers, main beams, and a bridge deck. The deck load is transmitted to the cables via the main beams, and then to the towers. Cable-stayed bridges are an important form of modern large-span bridge structures. Suspension bridges and cable-stayed bridges are often chosen, especially when constructing large bridges with large spans across canyons, bays, large rivers, and other places where piers are difficult to build. When closing the side spans of the main beams of conventional cable-stayed bridges, the continuous steel structure construction method is usually used as a reference, and cast-in-place sections and closure sections are set. When the volume of the cast-in-place section is large, it is necessary to use the scaffolding method to construct the cast-in-place section. After counterweighting the side span, a rigid frame is used to fix the cast-in-place section to the side span, and then the side span is closed using the jacking method. For example, the patent application number 201922070476.3 discloses an integral closure device for the side span of a rigid frame bridge, which utilizes the side pier bracket and the cantilever hanging basket to build a stable rigid working platform. On this working platform, the closure section and the cast-in-place section of the side pier are integrally molded and cast in place. However, this mechanism requires a large amount of lifting equipment, which makes the construction efficiency low and the construction difficult.

[0003] Summary of the Invention

[0004] One purpose of the present invention is to provide a flexible closed sliding and guiding device for closing the side span of a bridge, so that the sliding of the closed surface between the counterweight span beam section and the bottom template can be realized, and the closing process of the bridge side span can be realized by combining the guidance of the side template, thereby effectively improving the working efficiency.

[0005] In order to achieve these objects and other advantages according to the present invention, according to one aspect of the present invention, the present invention provides a flexible closed sliding and guiding device for closing the side span of a bridge, including a sliding system, which is provided with a bottom formwork and an upper formwork parallel to each other from bottom to top, and flexible sealing belts are provided on opposite sides of the bottom formwork to form a flexible closed cavity containing lubricating oil between the bottom formwork and the upper formwork, and two groups of guide side formworks are provided on both sides of the sliding system near the flexible sealing belt, and the two sides of the bottom formwork are respectively connected to the bottom of the two groups of guide side formworks, and the two sides of the upper formwork are respectively abutted against the inner walls of the two groups of guide side formworks, and a counterweight span beam section is cast between the top of the upper formwork and the two groups of guide side formworks.

[0006] Preferably, it also includes a plurality of support steel pipe piles extending vertically and arranged in multiple columns, each support steel pipe pile has a groove on the top, support beams are installed in the grooves of the multiple support steel pipe piles in each column, and the tops of the multiple support beams support the bottom template.

[0007] Preferably, a plurality of support cross braces are connected between every two adjacent support steel pipe piles.

[0008] Preferably, an extension is provided at one end of the upper formwork and the two sets of guide side forms extending beyond the bottom formwork, and a side pier assembly is installed at the bottom of the extension. The side pier assembly includes a side pier pile foundation, a side pier pedestal, a side pier single-wall pier and a side pier cap beam connected in sequence from bottom to top. A pot-type support is slidably installed on the top of the side pier cap beam, and its sliding direction is consistent with the length extension direction of the bottom formwork. The top of the pot support supports the extension.

[0009] Preferably, the end of the counterweight span beam section away from the side pier assembly is connected to multiple cantilever main beam sections through a closing section, and multiple inclined cables are set on the top of the multiple cantilever main beam sections to be connected to the main tower of the bridge.

[0010] Preferably, a plurality of bottom mold cross beams and a plurality of bottom mold longitudinal beams are fixedly installed on the bottom of the bottom mold plate.

[0011] Preferably, a plurality of side mold transverse ribs and a plurality of side mold longitudinal ribs are fixedly mounted on the outer side of each set of guide side molds.

[0012] Preferably, the bottom template is a steel plate.

[0013] Preferably, the upper template is a cold-rolled steel plate.

[0014] The present invention includes at least the following beneficial effects: the flexible closed sliding and guiding device for closing the side span of the bridge described in the present invention fully utilizes the construction template of the counterweight span beam section, so that the sliding of the closed surface is achieved between the counterweight span beam section and the bottom template, and combined with the guidance of the side template, the closing process of the bridge side span is realized, thereby effectively improving work efficiency.

[0015] Other advantages, objectives and features of the present invention will be reflected in part from the following description and will be understood by those skilled in the art through study and practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] FIG1 is a schematic structural diagram of a technical solution of the present invention;

[0017] FIG2 is a cross-sectional view of a technical solution of the present invention;

[0018] FIG3 is a schematic structural diagram of the sliding system in a technical solution of the present invention. DETAILED DESCRIPTION

[0019] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments so that those skilled in the art can implement the invention with reference to the description.

[0020] It should be understood that terms such as “having”, “including” and “comprising” used herein do not preclude the existence or addition of one or more other elements or combinations thereof.

[0021] It should be noted that the experimental methods described in the following embodiments are conventional methods unless otherwise specified, and the reagents and materials are commercially available unless otherwise specified. In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "set" should be understood in a broad sense, for example, they can be fixedly connected or set, or detachably connected or set, or integrally connected or set. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances. The directions or positional relationships indicated by the terms "transverse", "longitudinal", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc. are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description. They do not indicate or imply that the devices or elements referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as limiting the present invention.

[0022] As shown in Figures 1 to 3, the present invention provides a flexible closed sliding and guiding device for closing the side span of a bridge, including a sliding system 300, which is provided with a bottom template 100 and an upper template 101 parallel to each other from bottom to top, and flexible sealing belts 102 are provided on opposite sides of the bottom template 100, so that a flexible closed cavity 103 containing lubricating oil is formed between the bottom template 100 and the upper template 101, and the sliding system 300 is provided with two groups of guide side templates 104 on both sides near the flexible sealing belt 102, and the two sides of the bottom template 100 are respectively connected to the bottom of the two groups of guide side templates 104, and the two sides of the upper template 101 are respectively abutted against the inner walls of the two groups of guide side templates 104, and a counterweight span beam section 105 is cast between the top of the upper template 101 and the two groups of guide side templates 104.

[0023] In the present technical solution, the flexible closed sliding and guiding device for closing the side span of the bridge is provided with a sliding system 300 in the original construction template of the counterweight span beam section 105. The counterweight span beam section 105 is cast and formed, and outward-inclined guide side molds 104 are symmetrically installed on its front and rear sides. A bottom template 100 is installed on the bottom. The front and rear sides of the bottom template 100 are connected with flexible sealing belts 102 to form a groove-shaped structure. The upper template 101 covers the top of the groove to form a flexible closed cavity 103 between the bottom template 100, the upper template 101 and the flexible sealing belts 102 on both sides. Lubricating oil is injected into the flexible closed cavity 103, and the front and rear sides of the bottom template 100 are docked with the bottom of the two groups of guide side molds 104, and the front and rear sides of the upper template 101 abut against the inner walls of the two groups of guide side molds 104. When in use, concrete is poured between the upper formwork 101 and the two sets of guide side forms 104 to form a counterweight span beam section 105. The solidified counterweight span beam section 105 is located on the upper formwork 101. As the upper formwork 101 slides along the top surface of the flexible closed cavity 103, the bottom formwork 100 and the two sets of guide side forms 104 remain stationary during the sliding process. At the same time, the two sets of guide side forms 104 serve as guide structures to limit the sliding direction of the counterweight span beam section 105. The counterweight span beam section 105 moves relative to the bottom formwork 100 and the two sets of guide side forms 104 to realize the closing process of the bridge side span. The present invention makes full use of the casting construction template of the counterweight span beam section 105, with the bottom template 100 as the sliding surface and the side template as the guide, which saves the installation of auxiliary structures and improves work efficiency; lubricating oil is coated between the bottom template 100 and the upper template 101, and flexible sealing belts 102 are connected on both sides of the bottom template 100 to prevent the lubricating oil from being exposed. At the same time, a flexible closed cavity 103 is provided, and the top surface of the flexible closed cavity 103 on the bottom template 100 is used as the sliding surface to achieve relative movement between surfaces. Compared with open multi-point sliding, the sliding process is more stable and controllable, and due to the large volume and weight of the bridge body, a single closed surface sliding system can effectively avoid the problem of structural deformation caused by stress concentration; through the guiding effect of the guiding side template 104, it is guaranteed that the counterweight span beam section 105 can move freely longitudinally according to the preset controlled trajectory during the side span closing process, effectively improving construction efficiency.

[0024] In another technical solution, a plurality of support steel pipe piles 200 extending vertically and arranged in multiple rows are further included. A groove 201 is provided at the top of each support steel pipe pile 200. A support crossbeam 202 is installed in the groove 201 of the plurality of support steel pipe piles 200 in each row. The tops of the plurality of support crossbeams 202 support the bottom formwork 100. In this technical solution, a plurality of support steel pipe piles 200 are provided at the bottom of the bottom formwork 100. The plurality of support steel pipe piles 200 are arranged in multiple rows. A support crossbeam 202 is installed at the top of the support steel pipe piles 200 in each row. A rectangular groove 201 is provided at the top of each support steel pipe pile 200 for accommodating the support crossbeam 202. The tops of the support crossbeams 202 support the bottom formwork 100, providing support for the sliding system 300, the two sets of guide side forms 104, and the counterweight span beam section 105, thereby improving structural stability.

[0025] In another technical solution, a plurality of support cross braces 203 are connected between each two adjacent support steel pipe piles 200. In this technical solution, a plurality of support cross braces 203 are vertically connected between each two adjacent support steel pipe piles 200 to improve the stability of the structure.

[0026] In another technical solution, an extension portion is provided at one end of the upper formwork 101 and the two sets of guide side forms 104 extending beyond the bottom formwork 100, and a side pier assembly is installed at the bottom of the extension portion. The side pier assembly includes a side pier pile foundation 110, a side pier pedestal 111, a side pier single-wall pier 112 and a side pier cap beam 113 connected in sequence from bottom to top. A pot-type support 114 is slidably installed on the top of the side pier cap beam, and its sliding direction is consistent with the length extension direction of the bottom formwork 100. The top of the pot support 114 supports the extension portion. In this technical solution, the left ends of the upper formwork 101 and the two sets of guide side forms 104 extend beyond the left end of the bottom formwork 100 and are set as extensions, and a movable pot-type support 114 is installed below the extension. The pot-type support can be a pot-type rubber support disclosed in the prior art, and the bottom thereof is sequentially installed with a side pier cap beam 113, a side pier single-wall pier 112, a side pier base 111 and a side pier pile foundation 110 for supporting the pot-type support. The moving direction of the pot-type support 114 is consistent with the length extension direction of the counterweight span beam section 105, so as to meet the horizontal movement of the counterweight span beam section 105.

[0027] In another technical solution, the end of the counterweight span section 105 away from the side pier assembly is connected to multiple cantilever main beam sections 400 via a closure section 402. Multiple inclined cables 401 are installed on the tops of the multiple cantilever main beam sections 400 to connect to the bridge's main tower. In this technical solution, as shown in Figure 1, the closure section 402, multiple cantilever main beam sections 400, and the bridge's main tower are located at the right end of the counterweight span section 105. The inclined cables 401 extend to the upper right. The sliding system 300 drives the counterweight span section 105 to slide, completing the side span closure process.

[0028] In another technical solution, a plurality of bottom formwork cross beams 120 and a plurality of bottom formwork longitudinal beams 121 are fixedly mounted on the bottom of the bottom formwork 100. In this technical solution, the bottom formwork cross beams 120 and bottom formwork longitudinal beams 121 are provided to secure the bottom formwork 100. The length direction of each bottom formwork longitudinal beam 121 is consistent with the length extension direction of the counterweight span beam section 105. The plurality of bottom formwork cross beams 120 and the plurality of bottom formwork longitudinal beams 121 are perpendicular to each other, thereby improving structural stability.

[0029] In another technical solution, a plurality of side form transverse ribs 122 and a plurality of side form longitudinal ribs 123 are fixedly mounted on the outside of each set of guide side forms 104. In this technical solution, the side form transverse ribs 122 and side form longitudinal ribs 123 are provided to fix the guide side forms 104. The length direction of the plurality of side form longitudinal ribs 123 is consistent with the length extension direction of the counterweight span beam section 105. The plurality of side form transverse ribs 122 and the plurality of side form longitudinal ribs 123 are perpendicular to each other, thereby improving structural stability.

[0030] In another technical solution, the bottom template 100 is a steel plate. In this technical solution, the bottom template 100 is made of steel material to reduce sliding friction and ensure smooth sliding of the counterweight span beam section 105.

[0031] In another technical solution, the upper template 101 is a cold-rolled steel plate. In this technical solution, the cold-rolled steel plate is used, and the surface of the upper template 101 is smoother, which reduces friction and facilitates the smooth sliding of the counterweight span beam section 105.

[0032] Although the embodiments of the present invention have been disclosed above, they are not limited to the applications listed in the description and implementation methods. They can be fully applied to various fields suitable for the present invention. For those familiar with the art, additional modifications can be easily implemented. Therefore, without departing from the general concept defined by the claims and the scope of equivalents, the present invention is not limited to the specific details and illustrations shown and described herein.

Claims

1. A flexible closed sliding and guiding device for closing the side span of a bridge, characterized in that: The sliding system comprises a bottom template and an upper template which are parallel to each other from bottom to top, and flexible sealing belts are arranged on opposite sides of the bottom template to form a flexible closed cavity containing lubricating oil between the bottom template and the upper template, and two groups of guide side templates are arranged on both sides of the sliding system close to the flexible sealing belt, and the two sides of the bottom template are respectively connected to the bottoms of the two groups of guide side templates, and the two sides of the upper template are respectively abutted against the inner walls of the two groups of guide side templates, and a counterweight span beam section is cast between the top of the upper template and the two groups of guide side templates.

2. The flexible closed sliding and guiding device for closing the side span of a bridge according to claim 1, characterized in that: It also includes a plurality of support steel pipe piles extending vertically and arranged in a plurality of rows, each support steel pipe pile having a groove on the top, support cross beams installed in the grooves of the plurality of support steel pipe piles in each row, and the tops of the plurality of support cross beams support the bottom template.

3. The flexible closed sliding and guiding device for closing the side span of a bridge according to claim 2, characterized in that: A plurality of support cross braces are connected between every two adjacent support steel pipe piles.

4. The flexible closed sliding and guiding device for closing the side span of a bridge according to claim 1, characterized in that: An extension portion is arranged at one end of the upper formwork and the two sets of guide side forms, extending beyond the bottom formwork; a side pier assembly is installed at the bottom of the extension portion; the side pier assembly includes a side pier pile foundation, a side pier cap, a side pier single-wall pier and a side pier cap beam connected in sequence from bottom to top; a pot-type support is slidably installed on the top of the side pier cap beam, and its sliding direction is consistent with the length extension direction of the bottom formwork; the top of the pot-type support supports the extension portion.

5. The flexible closed sliding and guiding device for closing the side span of a bridge as claimed in claim 4, characterized in that: One end of the counterweight span beam section away from the side pier assembly is connected to a plurality of cantilever main beam sections through a closing section, and a plurality of inclined cables are arranged on the top of the plurality of cantilever main beam sections to be connected to the main tower of the bridge.

6. The flexible closed sliding and guiding device for closing the side span of a bridge according to claim 1, characterized in that: A plurality of bottom mold cross beams and a plurality of bottom mold longitudinal beams are fixedly installed at the bottom of the bottom mold plate.

7. The flexible closed sliding and guiding device for closing the side span of a bridge according to claim 1, characterized in that: A plurality of side form transverse ribs and a plurality of side form longitudinal ribs are fixedly installed on the outer side of each set of guide side forms.

8. The flexible closed sliding and guiding device for closing the side span of a bridge according to claim 1, characterized in that: The bottom template is a steel plate.

9. The flexible closed sliding and guiding device for closing the side span of a bridge according to claim 1, characterized in that: The upper template is a cold-rolled steel plate.

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