Formwork system for wet joint pouring of standard bridge deck sections

Abstract

This utility model belongs to the field of bridge construction technology and discloses a template system for pouring wet joints in standard sections of bridge decks. It includes a support frame and template components. The support frame is detachably installed on the side main beam of a large bridge via connectors. A height adjustment component is provided at the top of the support frame to adjust the height of the template components. The template components include steel plates forming the template support surface. Multiple support frames are fixedly connected to the outer side of the steel plates, and these support frames are equidistantly arranged along the length of the bridge deck. A longitudinal distribution beam is fixedly connected to the bottom of the support frames, and the longitudinal distribution beam presses against the height adjustment component. The modular design of this utility model allows for segmental continuous construction of the template, and it can be used for wet joints throughout the entire bridge, resulting in significant long-term economic benefits. The use of standardized, lightweight steel template units enables the template to achieve movable sliding formwork and reusability. The simplified operation process and rapid installation and dismantling greatly reduce labor costs and labor intensity.

Description

Technical Field

[0001] This utility model relates to the field of bridge construction technology, and in particular to a template system for wet joint casting of standard sections of bridge deck. Background Technology

[0002] In the field of bridge construction, the construction quality of wet joints in bridge decks is crucial to the stability and durability of the overall bridge structure.

[0003] Traditional formwork systems for wet joint pouring of bridge decks have many limitations. Firstly, early formwork often used wood, whose material properties make it prone to deformation and damage after repeated use. This results in poor concrete quality at the wet joints, making it difficult to guarantee surface smoothness and gloss, thus affecting the bridge's appearance. Secondly, wooden formwork has poor waterproofing, making it susceptible to moisture and rot in humid environments, reducing its lifespan and increasing construction costs.

[0004] On the other hand, some simple template systems are complicated to install and dismantle, consuming a lot of manpower and time.

[0005] To address this, a template system for wet joint pouring of standard bridge deck sections is proposed. Utility Model Content

[0006] The purpose of this invention is to provide a template system for the wet joint casting of standard bridge deck sections, thereby solving or at least alleviating one or more of the above-mentioned problems and other problems existing in the prior art.

[0007] To achieve the above objectives, the main technical solutions adopted by this utility model include:

[0008] The formwork system for the wet joint pouring of the standard section of the bridge deck includes a support and a formwork assembly. The support is detachably installed on the side main beam of the super bridge through connectors. The top of the support is provided with a height adjustment component for adjusting the height of the formwork assembly.

[0009] The template assembly includes a steel plate forming a template support surface. Multiple support frames are fixedly connected to the outer side of the steel plate. The multiple support frames are equidistantly arranged along the length of the bridge deck. A longitudinal distribution beam is fixedly connected to the bottom of the support frame, and the longitudinal distribution beam presses on the height adjustment component.

[0010] In the template system for wet joint casting of standard bridge deck sections according to the present invention, the support frame includes a second upright and a horizontal bar. The bottom of the second upright is fixedly connected to one end of the horizontal bar, and the other end of the horizontal bar is fixedly connected to the upper end of the second upright through a second diagonal bar. The second upright, the horizontal bar, and the second diagonal bar form a triangular stable structure, and the steel plate is fixed on the second diagonal bar.

[0011] In the template system for wet joint casting of standard bridge deck sections according to this utility model, the longitudinal distribution beam is an I-beam, and the longitudinal distribution beam is fixedly connected to the crossbar by a third bolt.

[0012] In the template system for wet joint casting of standard bridge deck sections according to the present invention, the support includes a base support, a first upright and a top support. The top of the first upright is fixedly connected to the bottom of the first upright, and the bottom of the first upright is fixedly connected to the top of the base support. A first diagonal brace is fixedly connected between the top support and the base support. The base support, the first upright, the top support and the first diagonal brace form a triangular stable structure.

[0013] In the template system for wet joint casting of standard bridge deck sections according to the present invention, the connecting member includes a fixing seat, the fixing seat is fixed to the upper end of the first upright, the fixing seat is located below the top support, the fixing seat is fixed to the bottom of the side main beam by a second bolt, and the top support is fixed to the top of the side main beam by a first bolt.

[0014] In the template system for wet joint casting of standard bridge deck sections according to the present invention, the height adjustment component includes a base, the base is fixed to the top of the top support, the top of the base is rotatably connected to an internal threaded sleeve, the internal thread of the internal threaded sleeve is connected to a stud, the top of the stud is fixedly connected to a U-shaped seat, and the longitudinal distribution beam is pressed inside the U-shaped seat.

[0015] In the template system for wet joint casting of standard bridge deck sections according to this utility model, a handle is fixedly connected to the outer wall of the internal threaded sleeve.

[0016] In the template system for wet joint casting of standard bridge deck sections according to this utility model, a guardrail is fixedly installed on the second upright.

[0017] This utility model has at least the following beneficial effects:

[0018] The modular design allows the formwork to be constructed in segments in a continuous flow, and it can be used for wet joints of the entire bridge, resulting in significant long-term economic benefits.

[0019] By adopting standardized and lightweight steel formwork units, the formwork can be moved and reused. The simplified operation process and quick installation and disassembly greatly reduce labor costs and labor intensity.

[0020] Significantly reduce or eliminate the costs associated with renting, transporting, installing, and dismantling a large amount of auxiliary materials such as steel pipes, couplers, and timber required for traditional full-span scaffolding;

[0021] In cases where there are highways, railways, or rivers under the bridge, the system creates a closed operating area on the bridge deck, minimizing disruption to traffic or navigation under the bridge and eliminating the need for road closures or navigation disruptions. Attached Figure Description

[0022] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings:

[0023] Figure 1 This is a schematic diagram of the structure of this utility model;

[0024] Figure 2 This is a schematic diagram of the structure of the bracket of this utility model;

[0025] Figure 3 for Figure 1 A magnified structural diagram of part A in the diagram;

[0026] Figure 4 for Figure 1 A magnified structural diagram of part B in the diagram.

[0027] Explanation of icon numbers:

[0028] 1. Bracket; 101. Base support; 102. First upright; 103. Top support; 104. First diagonal brace; 105. First bolt; 106. Fixing base; 107. Second bolt;

[0029] 2. Height adjustment component; 201. Base; 202. Internal threaded sleeve; 2021. Handle; 203. Stud; 204. U-shaped seat;

[0030] 3. Template components; 301. Second upright; 302. Horizontal bar; 303. Second diagonal bar; 304. Steel plate;

[0031] 4. Guardrails;

[0032] 5. Longitudinal distribution beam;

[0033] 6. The third bolt. Detailed Implementation

[0034] The following will describe in detail the implementation of this application with reference to the accompanying drawings and embodiments, so that the implementation process of how this application uses technical means to solve technical problems and achieve technical effects can be fully understood and implemented accordingly.

[0035] Please refer to Figures 1 to 4As shown, the embodiment of this utility model provides a template system for the wet joint casting of standard sections of bridge deck, including a support 1 and a template assembly 3. The support 1 is detachably installed on the side main beam of the super bridge through a connector. The top of the support 1 is provided with a height adjustment component 2 for adjusting the height of the template assembly 3. The template assembly 3 includes a steel plate 304, which forms a template support surface. Multiple support frames are fixedly connected to the outside of the steel plate 304. The multiple support frames are equidistantly arranged along the length of the super bridge deck. A longitudinal distribution beam 5 is fixedly connected to the bottom of the support frame, and the longitudinal distribution beam 5 presses on the height adjustment component 2.

[0036] The support frame 1 is installed on the side main beam via connectors, serving as the supporting foundation for the formwork assembly 3. The height adjustment component 2, through the threaded engagement of the internal threaded sleeve 202 and the stud 203, allows for adjustment of the vertical height of the formwork assembly 3. The steel plate 304 of the formwork assembly 3 serves as the direct bearing surface for the concrete; its outer side transfers the load to the longitudinal distribution beams 5 via the support frame, and finally to the support frame 1 via the height adjustment component 2. The equidistant arrangement of the longitudinal distribution beams 5 ensures uniform load distribution and avoids localized stress concentration.

[0037] In this embodiment, the support frame includes a second upright 301 and a crossbar 302. The bottom of the second upright 301 is fixedly connected to one end of the crossbar 302, and the other end of the crossbar 302 is fixedly connected to the upper end of the second upright 301 through a second diagonal bar 303. The second upright 301, the crossbar 302, and the second diagonal bar 303 form a triangular stable structure, and the steel plate 304 is fixed on the second diagonal bar 303.

[0038] The support frame adopts a triangular stabilizing structure, utilizing the geometric stability of triangles to enhance overall rigidity. The second upright 301 vertically supports the horizontal bar 302, and the second diagonal bar 303, as a diagonal member, converts the lateral load into axial force, preventing structural deformation. The steel plate 304 is fixed to the second diagonal bar 303, and the lateral pressure of the concrete is transferred to the horizontal bar 302 and the longitudinal distribution beam 5 through the rigid connection of the diagonal bar, ensuring the flatness and strength of the formwork support surface.

[0039] In this embodiment, the longitudinal distribution beam 5 is an I-beam, and the longitudinal distribution beam 5 is fixedly connected to the crossbar 302 by the third bolt 6.

[0040] The longitudinal distribution beam 5 is an I-beam, utilizing the cross-sectional properties of its flanges and web to withstand bending moments and shear forces. It is rigidly connected to the cross member 302 via the third bolt 6, uniformly distributing the load transmitted by the support frame along the bridge's longitudinal direction. The high moment of inertia of the I-beam makes it less prone to deflection over long spans, ensuring the stability of the formwork assembly 3. The bolted connection facilitates on-site installation and disassembly, while providing reliable shear and tensile strength.

[0041] In this embodiment, the support 1 includes a base 101, a first upright 102, and a top support 103. The top of the first upright 102 is fixedly connected to the bottom of the first upright 102, and the bottom of the first upright 102 is fixedly connected to the top of the base 101. A first diagonal rod 104 is fixedly connected between the top support 103 and the base 101. The base 101, the first upright 102, the top support 103, and the first diagonal rod 104 form a triangular stable structure.

[0042] The triangular stabilizing structure of bracket 1 resists horizontal and vertical loads through geometric constraints. The bottom support 101 is fixed to the bottom of the side main beam, and the top support 103 is connected to the top of the side main beam via the first bolt 105, forming a stable support with upper and lower clamping. The first diagonal brace 104 enhances the lateral displacement resistance of the uprights, transferring the load to the foundation through the uprights. This structure, through the rigid triangular connection, effectively disperses the concentrated load during wet joint construction.

[0043] In this embodiment, the connector includes a fixing seat 106, which is fixed to the upper end of the first upright 102. The fixing seat 106 is located below the top support 103. The fixing seat 106 is fixed to the bottom of the side main beam by a second bolt 107, and the top support 103 is fixed to the top of the side main beam by a first bolt 105.

[0044] The connectors employ a "top and bottom clamping" method: the top support 103 is connected to the top of the side main beam via a first bolt 105, and the fixing seat 106 is connected to the bottom of the side main beam via a second bolt 107, forming a mechanical lock on the side main beam. This dual-point anchoring method ensures a reliable connection between the support 1 and the side main beam, preventing horizontal slippage and vertical displacement. The fixing seat 106 is located below the top support 103, forming a force couple balance system together with the top support, enhancing anti-overturning capability.

[0045] In this embodiment, the height adjustment component 2 includes a base 201, which is fixed to the top of the top support 103. The top of the base 201 is rotatably connected to an internal threaded sleeve 202, and the internal thread of the internal threaded sleeve 202 is connected to a stud 203. The top of the stud 203 is fixedly connected to a U-shaped seat 204, and the longitudinal distribution beam 5 is pressed inside the U-shaped seat 204.

[0046] Height adjustment component 2 achieves height adjustment via threaded transmission: when the internal threaded sleeve 202 is rotated, the stud 203 undergoes axial displacement due to the threaded engagement, driving the U-shaped seat 204 to rise or fall, thereby adjusting the height of the longitudinal distribution beam 5. The base 201 is fixed to the top support 103, providing stable support; the groove of the U-shaped seat 204 engages with the longitudinal distribution beam 5, limiting its lateral displacement. This mechanical adjustment method offers high precision, adaptability to different wet joint elevation requirements, and ease of operation.

[0047] In this embodiment, a handle 2021 is fixedly connected to the outer wall of the internal threaded sleeve 202.

[0048] The handle 2021 serves as the operating interface, allowing construction personnel to manually rotate the internal threaded sleeve 202. Utilizing the lever principle, the required torque for adjustment is reduced, improving operational efficiency. The fixed connection of the handle ensures reliable transmission between the internal threaded sleeve 202 and the stud 203 during rotation, preventing slippage or free rotation, thus achieving precise height adjustment.

[0049] In this embodiment, a guardrail 4 is fixedly installed on the second upright 301. The guardrail 4 allows the template assembly 3 to temporarily serve as an operating platform for workers to tie steel bars, significantly reducing the psychological burden and risk of slipping for the workers.

[0050] The specific operation includes the following steps:

[0051] 1. Pre-construction preparation

[0052] After the corresponding stage of steel main girder installation, bridge deck hoisting, and secondary tensioning of stay cables are completed, the stability of the side main girder structure in the wet joint construction area is confirmed, and debris on the surface of the side main girder is cleaned to provide basic conditions for the installation of the support.

[0053] 2. Mounting bracket 1

[0054] Assemble bracket 1: Connect the base support 101, the first upright 102, the top support 103 and the first diagonal brace 104 in a triangular stable structure. The base support 101 is made of 10# channel steel, and the upright 102, diagonal brace 104 and top support 103 are made of 50 angle steel. All of them are made of Q235 steel and are fixed by connecting bolts to form a single bracket unit.

[0055] Fix the bracket to the side main beam: Use the connector to install the bracket 1 on the side main beam, and use the second bolt 107 to fix the fixing seat 106 to the bottom of the side main beam; at the same time, use the first bolt 105 to fix the top support 103 to the top of the side main beam, so as to realize the detachable connection between the bracket 1 and the side main beam.

[0056] Support arrangement: Six support pieces are arranged on each side along the bridge direction to ensure overall stability.

[0057] 3. Install height adjustment component 2

[0058] The base 201 of the height adjustment component 2 is fixed on the top of the top support 103, and the internal threaded sleeve 202, stud 203 and U-shaped seat 204 are installed in sequence for assembly.

[0059] 4. Install longitudinal distribution beam 5

[0060] The longitudinal distribution beam 5 is placed inside the U-shaped seat 204 of the height adjustment component 2, so that it is stably pressed in the U-shaped seat 204. The position is initially adjusted to ensure smoothness along the bridge direction. The longitudinal distribution beam 5 is made of I10 I-beam.

[0061] 5. Install template component 3

[0062] Assemble template component 3: Fix multiple support frames at equal intervals along the length of the bridge deck to the outside of the steel plate 304 so that the steel plate 304 forms a template support surface; fix the crossbar 302 of the support frame to the longitudinal distribution beam 5 with the third bolt 6 to ensure the stability of the load transfer path.

[0063] Installation in place: The assembled template component 3 is hoisted onto the longitudinal distribution beam 5 as a whole, so that the crossbar 302 is precisely connected with the longitudinal distribution beam 5 to complete the fixation.

[0064] 6. Template height and sealing adjustment

[0065] Height adjustment: By rotating the handle 2021 of the height adjustment component 2, the internal threaded sleeve 202 is rotated, and the stud 203 is raised and lowered by the thread transmission. Then, the height of the template assembly 3 is adjusted by the U-shaped seat 204 and the longitudinal distribution beam 5 to ensure that the support surface of the steel plate 304 meets the design elevation of the wet joint.

[0066] Sealing inspection: Confirm that the 304 steel plate and the precast slab are tightly bonded. A sealing strip can be installed on the contact surface between the 304 steel plate and the precast slab. The sealing strip can be pre-fixed to the 304 steel plate to prevent grout leakage.

[0067] 7. Concrete pouring and vibration

[0068] Concrete is poured into the wet joint using template assembly 3, and vibrator is used to thoroughly compact the concrete to ensure it is dense. The stability of template 3 and support 1 is checked during the pouring process.

[0069] 8. Demolding operation

[0070] After the wet joint concrete reaches the design strength, rotate the handle 2021 in the opposite direction to make the internal threaded sleeve 202 drive the stud 203 to descend. The height of the longitudinal distribution beam 5 and the formwork assembly 3 is reduced through the U-shaped seat 204, so that the steel plate 304 is separated from the concrete surface, and the demolding is completed.

[0071] 9. Relocation Construction

[0072] Install the next segment support 1 and height adjustment component 2, slide the template assembly 3 to the next segment position, repeat steps 4-8 to carry out the pouring construction of the wet joint of the next segment, and at the same time remove the previous segment support 1 and height adjustment component 2.

[0073] It should be noted that the formwork component 3 is hoisted and moved as a whole through the pre-set lifting points on the beam surface. During assembly, the support 1, height adjustment component 2, and formwork component 3 only need to be assembled once.

[0074] The foregoing description illustrates and describes several preferred embodiments of the present invention. However, as previously stated, it should be understood that the present invention is not limited to the forms disclosed herein and should not be construed as excluding other embodiments. It can be used in various other combinations, modifications, and environments, and can be altered within the scope of the present invention's conception through the foregoing teachings or related technical or knowledge. Any modifications and variations made by those skilled in the art that do not depart from the spirit and scope of the present invention should be within the protection scope of the appended claims.

Claims

1. A formwork system for wet joint casting of standard bridge deck sections, characterized in that, It includes a support (1) and a template assembly (3). The support (1) is detachably installed on the side main beam of the super bridge via a connector. The top of the support (1) is provided with a height adjustment component (2) for adjusting the height of the template assembly (3). The template assembly (3) includes a steel plate (304), which forms a template support surface. Multiple support frames are fixedly connected to the outer side of the steel plate (304). The multiple support frames are equidistantly arranged along the length of the bridge deck. A longitudinal distribution beam (5) is fixedly connected to the bottom of the support frame. The longitudinal distribution beam (5) presses on the height adjustment component (2).

2. The formwork system for wet joint casting of standard bridge deck sections according to claim 1, characterized in that: The support frame includes a second upright (301) and a crossbar (302). The bottom of the second upright (301) is fixedly connected to one end of the crossbar (302). The other end of the crossbar (302) is fixedly connected to the upper end of the second upright (301) through a second diagonal bar (303). The second upright (301), the crossbar (302), and the second diagonal bar (303) form a triangular stable structure. The steel plate (304) is fixed on the second diagonal bar (303).

3. The formwork system for wet joint casting of standard bridge deck sections according to claim 2, characterized in that: The longitudinal distribution beam (5) is an I-beam, and the longitudinal distribution beam (5) is fixedly connected to the crossbar (302) by the third bolt (6).

4. The formwork system for wet joint casting of standard bridge deck sections according to claim 3, characterized in that: The bracket (1) includes a base (101), a first upright (102), and a top support (103). The top of the first upright (102) is fixedly connected to the bottom of the first upright (102), and the bottom of the first upright (102) is fixedly connected to the top of the base (101). A first diagonal rod (104) is fixedly connected between the top support (103) and the base (101). The base (101), the first upright (102), the top support (103), and the first diagonal rod (104) form a triangular stable structure.

5. The formwork system for wet joint casting of standard bridge deck sections according to claim 4, characterized in that: The connector includes a fixing seat (106), which is fixed to the upper end of the first upright (102). The fixing seat (106) is located below the top support (103). The fixing seat (106) is fixed to the bottom of the side main beam by a second bolt (107). The top support (103) is fixed to the top of the side main beam by a first bolt (105).

6. The formwork system for wet joint casting of standard bridge deck sections according to claim 4, characterized in that: The height adjustment component (2) includes a base (201), which is fixed to the top of the top support (103). The top of the base (201) is rotatably connected to an internal threaded sleeve (202), and the internal thread of the internal threaded sleeve (202) is connected to a stud (203). The top of the stud (203) is fixedly connected to a U-shaped seat (204), and the longitudinal distribution beam (5) is pressed inside the U-shaped seat (204).

7. The formwork system for wet joint casting of standard bridge deck sections according to claim 6, characterized in that: The outer wall of the internal threaded sleeve (202) is fixedly connected to a handle (2021).

8. The formwork system for wet joint casting of standard bridge deck sections according to claim 2, characterized in that: A guardrail (4) is fixedly installed on the second upright (301).

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