Flexible closure slip and guide for bridge closure

Abstract

The application discloses a flexible closed sliding and guiding device for bridge side span closure, which comprises a sliding system, wherein a bottom mold plate and an upper mold plate are arranged in parallel from bottom to top, opposite sides of the bottom mold plate are provided with flexible sealing belts, a flexible closed cavity filled with lubricating oil is formed between the bottom mold plate and the upper mold plate, two groups of guiding side molds are arranged on both sides of the flexible sealing belts, the bottom mold plate is connected with the bottoms of the two groups of guiding side molds respectively, the upper mold plate is abutted with the inner walls of the two groups of guiding side molds respectively, and a balance cross beam section is cast between the top of the upper mold plate and the two groups of guiding side molds. The flexible closed sliding and guiding device for bridge side span closure makes full use of the construction mold plate of the balance cross beam section, realizes the closed surface sliding between the balance cross beam section and the bottom mold plate, realizes the closure process of the bridge side span in combination with the guiding of the side mold, and effectively improves the work efficiency.

Description

Technical Field

[0001] This invention relates to the field of bridge construction technology. More specifically, this invention relates to a flexible, closed sliding and guiding device for the closure of bridge side spans. Background Technology

[0002] A cable-stayed bridge consists of cables, towers, a main girder, and a bridge deck. The load on the bridge deck is transferred to the cables via the main girder, and then from the cables to the towers. Cable-stayed bridges are an important type of modern long-span bridge, especially when constructing large-span bridges across canyons, bays, large rivers, or other locations where it is difficult to build bridge piers. Suspension bridges and cable-stayed bridges are often chosen in these situations. When closing the side spans of a conventional cable-stayed bridge, the construction method is usually referenced to continuous steel structure construction, with cast-in-place sections and closure sections. When the volume of the cast-in-place section is large, a scaffolding method is required. After counterweighting the side spans, a stiffening frame is used to fix the cast-in-place section to the side spans, and then the side spans are closed using the incremental launching method. For example, the patent application number 201922070476.3 discloses an integral closure device for the side span of a rigid frame bridge. It uses the side pier bracket and cantilever hanging basket to build a stable rigid working platform. On this working platform, the closure section and the side pier cast-in-place section are integrally molded and cast in place. However, this mechanism requires a large number of hoisting equipment, which makes the construction efficiency low and the construction difficult. Summary of the Invention

[0003] One objective of this invention is to provide a flexible closed sliding and guiding device for bridge side span closure, enabling sliding of the closed surface between the counterweight span beam segment and the bottom formwork. Combined with the guidance of the side formwork, this facilitates the closure process of the bridge side span, effectively improving work efficiency.

[0004] To achieve these objectives and other advantages according to the invention, according to one aspect of the invention, a flexible closed sliding and guiding device for bridge side span closure is provided, comprising a sliding system having a bottom template and an upper template arranged from bottom to top, the bottom template having flexible sealing strips on opposite sides to form a flexible closed cavity containing lubricating oil between the bottom template and the upper template, the sliding system having two sets of guide side molds arranged on both sides near the flexible sealing strips, the bottom template having both sides connected to the bottom of the two sets of guide side molds respectively, the upper template having both sides abutting against the inner walls of the two sets of guide side molds respectively, and a counterweight span segment being cast between the top of the upper template and the two sets of guide side molds.

[0005] Preferably, it also includes multiple vertically extending and arranged in multiple columns of support steel pipe piles, each support steel pipe pile having a groove on its top, and a support beam installed in the groove of each column of multiple support steel pipe piles, with the top of the multiple support beams supporting the bottom template.

[0006] Preferably, multiple cross braces are connected between each pair of adjacent support steel pipe piles.

[0007] Preferably, one end of the upper template and the two sets of guide side templates is provided with an extension that extends beyond the bottom template. 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 cap, a side pier single wall pier, and a side pier cap beam connected sequentially from bottom to top. A pot bearing 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 template. The top of the pot bearing supports the extension.

[0008] Preferably, the end of the counterweight span segment away from the side pier assembly is connected to multiple cantilever main beam segments via a closure segment, and multiple stay cables are installed at the top of the multiple cantilever main beam segments to connect with the main tower of the bridge.

[0009] Preferably, the bottom of the bottom template is fixedly equipped with multiple bottom template crossbeams and multiple bottom template longitudinal beams.

[0010] Preferably, each set of guide side molds has multiple side mold transverse ribs and multiple side mold longitudinal ribs fixedly installed on its outer side.

[0011] Preferably, the bottom template is a steel plate.

[0012] Preferably, the upper template is a cold-rolled steel plate.

[0013] The present invention has at least the following beneficial effects: The flexible closed sliding and guiding device for bridge side span closure described in the present invention makes full use of the construction formwork of the counterweight span beam segment, so as to realize the sliding of the closed surface between the counterweight span beam segment and the bottom formwork. Combined with the guidance of the side formwork, the closure process of the bridge side span is realized, which effectively improves the work efficiency.

[0014] Other advantages, objectives and features of the present invention will become apparent in part from the following description, and in part from those skilled in the art through study and practice of the invention. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of one technical solution of the present invention;

[0016] Figure 2 This is a cross-sectional view of one technical solution of the present invention;

[0017] Figure 3 This is a schematic diagram of the sliding system described in one technical solution of the present invention. Detailed Implementation

[0018] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments, so that those skilled in the art can implement it based on the description.

[0019] It should be understood that terms such as “having,” “comprising,” and “including” as used herein do not exclude the presence or addition of one or more other elements or combinations thereof.

[0020] It should be noted that, unless otherwise specified, the experimental methods described in the following embodiments are conventional methods, and the reagents and materials described are commercially available. In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "setting" should be interpreted broadly. For example, they can refer to fixed connection or setting, detachable connection or setting, or integral connection or setting. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances. The terms "lateral," "longitudinal," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this invention and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.

[0021] like Figures 1-3 As shown, the present invention provides a flexible closed sliding and guiding device for bridge side span closure, including a sliding system 300, which has a bottom template 100 and an upper template 101 arranged from bottom to top. Flexible sealing strips 102 are provided on opposite sides of the bottom template 100, forming a flexible closed cavity 103 containing lubricating oil between the bottom template 100 and the upper template 101. Two sets of guide side molds 104 are arranged on both sides of the sliding system 300 near the flexible sealing strips 102. The two sides of the bottom template 100 are respectively connected to the bottom of the two sets of guide side molds 104, and the two sides of the upper template 101 abut against the inner walls of the two sets of guide side molds 104. A counterweight span section 105 is cast between the top of the upper template 101 and the two sets of guide side molds 104.

[0022] In this technical solution, the flexible closed sliding and guiding device for bridge side span closure is provided with a sliding system 300 in the original construction template of the counterweight span beam segment 105. The counterweight span beam segment 105 is cast and formed, and symmetrically installed with outwardly inclined guide side molds 104 on its front and rear sides. A bottom template 100 is installed at the bottom. Flexible sealing strips 102 are connected to the front and rear sides of the bottom template 100 to form a groove-shaped structure. The upper template 101 covers the groove, so that a flexible closed cavity 103 is formed between the bottom template 100, the upper template 101 and the flexible sealing strips 102 on both sides. Lubricating oil is injected into the flexible closed cavity 103. The front and rear sides of the bottom template 100 are connected to the bottom of the two sets of guide side molds 104, and the front and rear sides of the upper template 101 abut against the inner walls of the two sets of guide side molds 104. During use, concrete is poured between the upper template 101 and the two sets of guide side molds 104 to form a counterweight span section 105. After curing, the counterweight span section 105 is located on the upper template 101. As the upper template 101 slides along the top surface of the flexible closed cavity 103, the bottom template 100 and the two sets of guide side molds 104 remain stationary during the sliding process. At the same time, the two sets of guide side molds 104 act as guide structures, limiting the sliding direction of the counterweight span section 105. The counterweight span section 105 moves relative to the bottom template 100 and the two sets of guide side molds 104, realizing the closure process of the bridge side span. This invention fully utilizes the casting formwork of the counterweight span section 105, using the bottom formwork 100 as the sliding surface and the side formwork as the guide, saving on the installation of auxiliary structures and improving work efficiency. Lubricating oil is applied between the bottom formwork 100 and the upper formwork 101, and flexible sealing strips 102 are connected to both sides of the bottom formwork 100 to prevent lubricating oil leakage. A flexible closed cavity 103 is also provided, with the top surface of the flexible closed cavity 103 on the bottom formwork 100 serving as the sliding surface, enabling relative movement between surfaces. Compared to open multi-point sliding, the sliding process is more stable and controllable. Furthermore, due to the large volume and weight of the bridge structure, the single closed-surface sliding system effectively avoids structural deformation caused by stress concentration. The guiding action of the guide side formwork 104 ensures that the counterweight span section 105 moves freely longitudinally along a preset controlled trajectory during the side span closure process, effectively improving construction efficiency.

[0023] In another technical solution, multiple vertically extending and arranged in multiple rows of support steel pipe piles 200 are also included. Each support steel pipe pile 200 has a groove 201 at its top. A support beam 202 is installed within the groove 201 of each row of support steel pipe piles 200. The tops of the support beams 202 support the bottom formwork 100. In this technical solution, multiple support steel pipe piles 200 are provided at the bottom of the bottom formwork 100, arranged in multiple rows. A support beam 202 is installed at the top of each row of support steel pipe piles 200, and each support steel pipe pile 200 has a cuboid groove 201 at its top for the support beam 202 to accommodate. The tops of the support beams 202 support the bottom formwork 100, providing support for the sliding system 300, the two sets of guide side molds 104, and the counterweight span section 105, thereby improving structural stability.

[0024] In another technical solution, multiple support cross braces 203 are connected between every two adjacent support steel pipe piles 200. In this technical solution, multiple support cross braces 203 are vertically connected between two adjacent support steel pipe piles 200, which improves the stability of the structure.

[0025] In another technical solution, one end of the upper template 101 and the two sets of guide side templates 104 is provided with an extension that extends beyond the bottom template 100. A side pier assembly is installed at the bottom of the extension. The side pier assembly includes a side pier pile foundation 110, a side pier cap 111, a side pier single wall pier 112, and a side pier cap beam 113 connected sequentially from bottom to top. A pot bearing 114 is slidably installed on the top of the side pier cap beam. Its sliding direction is consistent with the length extension direction of the bottom template 100. The top of the pot bearing 114 supports the extension. In this technical solution, the left ends of the upper template 101 and the two sets of guide side templates 104 extend beyond the left end of the bottom template 100 as extensions. A movable pot bearing 114 is installed below the extension. The pot bearing can be a pot bearing rubber bearing disclosed in the prior art. The bottom of the pot bearing is sequentially equipped with a side pier cap beam 113, a side pier single wall pier 112, a side pier foundation 111, and a side pier pile foundation 110 to support the pot bearing. The moving direction of the pot bearing 114 is consistent with the length extension direction of the counterweight span beam segment 105, satisfying the horizontal movement of the counterweight span beam segment 105.

[0026] In another technical solution, the end of the counterweight span 105 furthest from the side pier assembly is connected to multiple cantilever main beam segments 400 via a closure section 402. Multiple stay cables 401 are installed at the top of the multiple cantilever main beam segments 400 and connected to the main tower of the bridge. In this technical solution, as... Figure 1As shown, the closing section 402, multiple cantilevered main beam sections 400, and the main tower of the bridge are located at the right end of the counterweight span section 105. The stay cable 401 extends to the upper right. The sliding system 300 drives the counterweight span section 105 to slide, realizing the side span closing process.

[0027] In another technical solution, multiple bottom formwork crossbeams 120 and multiple bottom formwork longitudinal beams 121 are fixedly installed at the bottom of the bottom formwork 100. In this technical solution, the bottom formwork crossbeams 120 and bottom formwork longitudinal beams 121 are provided to fix 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 section 105. The multiple bottom formwork crossbeams 120 and multiple bottom formwork longitudinal beams 121 are all perpendicular to each other, improving structural stability.

[0028] In another technical solution, multiple side mold transverse ribs 122 and multiple side mold longitudinal ribs 123 are fixedly installed on the outer side of each set of guide side molds 104. In this technical solution, the side mold transverse ribs 122 and side mold longitudinal ribs 123 are provided to fix the guide side molds 104. The length direction of the multiple side mold longitudinal ribs 123 is consistent with the length extension direction of the counterweight span section 105. The multiple side mold transverse ribs 122 and multiple side mold longitudinal ribs 123 are all perpendicular to each other, which improves the structural stability.

[0029] In another technical solution, the bottom formwork 100 is a steel plate. In this technical solution, the bottom formwork 100 is made of steel, which reduces sliding friction and ensures the smooth sliding of the counterweight span beam 105.

[0030] In another technical solution, the upper template 101 is made of cold-rolled steel plate. Using cold-rolled steel plate in this solution makes the surface of the upper template 101 smoother, reducing friction and facilitating the smooth sliding of the counterweight span section 105.

[0031] Although embodiments of the present invention have been disclosed above, they are not limited to the applications listed in the specification and embodiments. They can be applied to various fields suitable for the present invention. For those skilled in the art, other modifications can be easily made. Therefore, without departing from the general concept defined by the claims and their equivalents, the present invention is not limited to the specific details and illustrations shown and described herein.

Claims

1. A flexible closure jacking and guiding device for bridge closure, characterized in that, The sliding system is provided with a bottom mold plate and an upper mold plate in parallel with each other from bottom to top, the opposite sides of the bottom mold plate are provided with flexible sealing strips, so that a flexible closed cavity containing lubricating oil is formed between the bottom mold plate and the upper mold plate, two groups of guide side molds are arranged near the two sides of the flexible sealing strips, the two sides of the bottom mold plate are connected with the bottoms of the two groups of guide side molds respectively, the two sides of the upper mold plate are abutted with the inner walls of the two groups of guide side molds respectively, and the top of the upper mold plate is poured with a balance cross beam section between the two groups of guide side molds.

2. The flexible containment and launching device for bridge closure gap closure of claim 1, wherein, A plurality of support steel pipe piles extending vertically and arranged in multiple columns are further included, the top of each support steel pipe pile is provided with a groove, the grooves of the support steel pipe piles in each column are provided with support cross beams, and the top of the plurality of support cross beams supports the bottom mold plate.

3. The flexible containment launching and guiding apparatus for closure gap closure of a bridge span as claimed in claim 2 wherein, A plurality of support cross braces are connected between each two adjacent support steel pipe piles.

4. The flexible containment and launching device for bridge closure gap closure of claim 1, wherein, One end of the upper mold plate and the two groups of guide side molds is provided with an extension part beyond the bottom mold plate, the bottom of the extension part is provided with a side pier assembly, the side pier assembly includes a side pier pile foundation, a side pier pile cap, a side pier single-wall pier and a side pier cap beam connected in sequence from bottom to top, the top of the side pier cap beam is slidably provided with a pot support, the sliding direction of the pot support is consistent with the length extension direction of the bottom mold plate, and the top of the pot support supports the extension part.

5. The flexible containment and launching device for bridge closure gap closure of claim 4, wherein, The balance cross beam section is connected with a plurality of cantilever main beam sections through a closing section away from the side pier assembly, and the top of the plurality of cantilever main beam sections is provided with a plurality of stay cables connected with the main tower of the bridge.

6. The flexible containment launching and guiding apparatus for closure gap closure of bridges as claimed in claim 1 wherein, The bottom of the bottom mold plate is fixedly provided with a plurality of bottom mold cross beams and a plurality of bottom mold longitudinal beams.

7. The flexible containment launching and guiding apparatus for closure gap closure of bridges as claimed in claim 1 wherein, The outer side of each group of guide side molds is fixedly provided with a plurality of side mold cross ribs and a plurality of side mold longitudinal ribs.

8. The flexible containment and launching device for bridge deck closure as claimed in claim 1, wherein, The bottom mold plate is a steel plate.

9. The flexible containment launching and guiding apparatus for closure of bridge deck gaps as claimed in claim 1 wherein, The upper mold plate is a cold-rolled steel plate.

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