A mobile trolley suitable for double-layer double-width bridge post-pouring section construction

Abstract

This utility model discloses a mobile trolley suitable for the construction of post-cast sections of double-layer, double-span bridges. It includes a support frame with several support legs evenly distributed at the bottom, and several wheels spaced apart at the bottom of the support frame and beside the support legs. Connectors are provided on the sides of the support frame, with their outer bottom ends connected to a bottom lifting cylinder and a horizontal cylinder. A top lifting cylinder and a longitudinal beam are sequentially fixed to the top of the support frame, and a pad beam is placed on top of the longitudinal beam. A temporary frame for supporting the post-cast section construction is mounted on the pad beam, and a bottom formwork platform is placed on top of the temporary frame. The support legs are adjustable in height, and the wheels are driven by a drive motor. This mobile trolley can flexibly adjust its height and position to adapt to different cross-sectional dimensions and construction environments, improve formwork positioning accuracy, and has high moving efficiency, meeting the needs of large-span or variable-section construction.

Description

Technical Field

[0001] This utility model relates to the field of cast-in-place bridge joint technology, and in particular to a mobile trolley suitable for the construction of post-cast sections of double-layer double-span bridges. Background Technology

[0002] In the construction of bridges combining road and rail, designers often design double-deck bridges, taking into account limited bridge site resources and the traffic demands of both the road and rail. The top deck of the double-deck bridge typically features a dual-span structure. During the construction of such double-span bridges, the connecting section is called the post-cast section, which must be poured after both spans of the bridge have been completed.

[0003] In existing technologies, the post-cast section is generally handled using a suspension method, which involves anchoring the bottom formwork to the already cast bridge using rebar or similar materials. However, this method not only damages the existing bridge structure but also suffers from difficulties in adjustment. With technological advancements, mobile formwork equipment has emerged in the tunnel engineering field to support the formwork system and enable continuous concrete pouring. However, the height and position adjustment capabilities of these mobile formwork equipment are limited, making it difficult to adapt to the needs of different cross-sectional dimensions or complex construction environments. Insufficient formwork positioning accuracy also affects the quality of concrete pouring. Summary of the Invention

[0004] The purpose of this utility model is to provide a mobile trolley suitable for the construction of post-cast sections of double-layer, double-span bridges.

[0005] The purpose of this utility model is achieved as follows:

[0006] A mobile trolley suitable for the construction of post-cast sections of double-layer, double-span bridges is characterized by: a support frame, with a plurality of support legs evenly arranged at the bottom of the support frame, and a plurality of traveling wheels spaced apart at the bottom of the support frame and beside the support legs, the traveling wheels and the support legs being on the same horizontal axis; a connector is provided on the side of the support frame, the outer bottom end of the connector being connected to the top of the bottom lifting cylinder, and the bottom of the bottom lifting cylinder being connected to the top of the horizontal cylinder; a top lifting cylinder and a longitudinal beam are sequentially fixed on the top of the support frame, and the top lifting cylinder can push the longitudinal beam to move up and down; a pad beam is provided on the top of the longitudinal beam.

[0007] Furthermore, a temporary frame for supporting the construction of the post-cast section is set on the pad beam, and a bottom formwork platform is set on top of the temporary frame. The structure of the bottom formwork platform is different in different locations.

[0008] Furthermore, the support leg has a height-adjustable structure, and the top of the support leg is connected and fixed to the bottom of the support frame.

[0009] Furthermore, a drive motor is installed inside the walking wheels.

[0010] Furthermore, the support frame is a frame structure, which is made up of multiple horizontal and vertical steel beams welded or bolted together. The longitudinal beams and pad beams are all steel structural members made of I-beams or channel steel. The longitudinal beams and pad beams are arranged perpendicularly to each other and serve as the load-bearing structure and construction platform of the temporary frame.

[0011] Furthermore, the temporary frame is a detachable structure, consisting of multiple standard members connected by bolts. The standard members are made of aluminum alloy. The top of the temporary frame is equipped with a connecting device for fixing the bottom formwork platform. The connecting device is a slot or bolt hole. The bottom formwork platform is divided into a mid-span casting section and a side-span casting section according to the casting area. The bottom formwork platform of the mid-span casting section is an integral steel plate structure, while the bottom formwork platform of the side-span casting section is a segmented frame structure with side forms.

[0012] Compared with the prior art, the beneficial effects of this utility model are:

[0013] 1. The height of the longitudinal beams, pad beams, temporary frames, and bottom formwork platform above the support frame can be flexibly adjusted through the top lifting cylinder, which can adapt to the construction requirements of bridges of different heights and post-cast sections of different heights, and solve the problem of limited height adjustment capability of existing fixed support structures.

[0014] 2. The support legs are adjustable in height and height, and with the horizontal cylinder, they can be adjusted not only in the vertical direction, but also in the horizontal direction. This makes the formwork positioning more accurate, effectively improves the quality of concrete pouring, and makes up for the lack of horizontal adjustment capability of some existing mobile trolleys.

[0015] 3. The temporary frame on the support beam is a detachable structure, which is convenient for assembly and disassembly according to construction needs;

[0016] 4. The bottom formwork platform is divided into the middle span pouring section and the side span pouring section according to the pouring area. The integral steel plate structure of the middle span pouring section and the segmented frame structure with side formwork of the side span pouring section can meet the pouring requirements of different positions and improve the adaptability of the mobile trolley to different construction environments.

[0017] 5. This mobile trolley can flexibly adjust its height and position to adapt to different cross-sectional dimensions and construction environments, improve the positioning accuracy of the template, and has high moving efficiency, which can meet the construction needs of large spans or variable cross sections. Attached Figure Description

[0018] Figure 1 This is a front view of the mobile trolley of this utility model;

[0019] Figure 2 This is a schematic diagram of the mid-span cross-section of the mobile trolley of this utility model;

[0020] Figure 3 for Figure 1 A side view;

[0021] Figure 4 This is a top view of the cross-section of the present invention;

[0022] Figure 5 This is a plan view of the present invention;

[0023] Figure 6 for Figure 1 A schematic diagram of the construction status;

[0024] Figure 7 for Figure 2 A schematic diagram of the construction status;

[0025] Figure 8 for Figure 3 A schematic diagram of the construction status;

[0026] Figure 9 This is a schematic diagram of the cross-sectional state of the mobile trolley descending after the pouring of the present invention is completed;

[0027] Figure 10 This is a schematic diagram of the cross-sectional state of the mobile trolley supported by the traveling wheels after the trolley has been lowered according to this utility model;

[0028] Figure 11 for Figure 10 A side view;

[0029] In the diagram: 1. Horizontal hydraulic cylinder; 2. Bottom lifting hydraulic cylinder; 3. Support frame; 4. Top lifting hydraulic cylinder; 5. Temporary frame; 6. Bottom formwork platform; 7. Longitudinal beam; 8. Support leg; 9. Traveling wheel; 10. Pad beam; 11. Connector; 12. Bridge; 13. Post-cast section. Detailed Implementation

[0030] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0031] A mobile trolley suitable for the construction of post-cast sections of double-layer, double-span bridges includes a support frame 3. Several support legs 8 are evenly arranged at the bottom of the support frame 3, and several traveling wheels 9 are installed at intervals at the bottom of the support frame 3 and beside the support legs 8. The traveling wheels 9 and the support legs 8 are on the same horizontal axis. A connector 11 is provided on the side of the support frame 3. The outer bottom end of the connector 11 is connected to the top of the bottom lifting cylinder 2, and the bottom of the bottom lifting cylinder 2 is connected to the top of the horizontal cylinder 1. A top lifting cylinder 4 and a longitudinal beam 7 are fixed sequentially on the top of the support frame 3. The top lifting cylinder 4 can push the longitudinal beam 7 to move up and down. A pad beam 10 is provided on the top of the longitudinal beam 7.

[0032] A temporary frame 5 for supporting the construction of the post-cast section is set on the pad beam 10, and a bottom formwork platform 6 is set on the top of the temporary frame 5. The bottom formwork platform 6 has different structures at different locations.

[0033] The support leg 8 is a height-adjustable structure, and the top of the support leg 8 is connected and fixed to the bottom of the support frame 3.

[0034] A drive motor is installed inside the walking wheel 9.

[0035] The support frame 3 is a frame structure, which is made of multiple horizontal and vertical steel beams welded or bolted together. The longitudinal beams 7 and pad beams 10 are steel structural members made of I-beams or channel steel. The longitudinal beams 7 and pad beams 10 are arranged perpendicularly to each other and serve as the load-bearing structure and construction platform of the temporary frame 5.

[0036] The temporary frame 5 is a detachable structure, which is composed of multiple standard rods connected by bolts. The standard rods are made of aluminum alloy. The top of the temporary frame 5 is equipped with a connecting device for fixing the bottom formwork platform 6. The connecting device is a slot or bolt hole. The bottom formwork platform 6 is divided into a middle span casting section and a side span casting section according to the casting area. The bottom formwork platform 6 of the middle span casting section is an integral steel plate structure, while the bottom formwork platform 6 of the side span casting section is a segmented frame structure with side formwork.

[0037] Installation process:

[0038] 1. Select a suitable site at the construction site to assemble the mobile trolley; first, assemble the various rods of the support frame 3 according to the design requirements by welding or bolting to ensure a firm connection and form a stable frame structure.

[0039] 2. Install several support legs 8 at the bottom of the support frame 3. Make sure the support legs 8 are evenly distributed to ensure the overall stability of the moving trolley.

[0040] 3. Install connector 11, bottom lifting cylinder 2 and horizontal cylinder 1 on the side of support frame 3, and install top lifting cylinder 4 on top of support frame 3, and ensure that bottom lifting cylinder 2 and top lifting cylinder 4 are installed in accurate positions, reliably connected and able to work normally.

[0041] 4. Install the traveling wheels 9 on the bottom of the support frame 3, which is coaxial with the support legs 8, and install a drive motor to enable the traveling wheels 9 to drive, making it easy for the mobile trolley to move on the construction site.

[0042] 5. Construct the longitudinal beam 7 and the pad beam 10, and connect the longitudinal beam 7 to the support frame 3 through the top lifting cylinder 4 to ensure that the longitudinal beam 7 can be raised and lowered smoothly under the push of the top lifting cylinder 4;

[0043] 6. Build a temporary frame 5 on the pad beam 10 according to construction needs. Use standard aluminum alloy rods and assemble them by bolt connection. Install a connecting device, such as a slot or bolt hole, on the top of the temporary frame 5 to fix the bottom formwork platform 6.

[0044] 7. Select a suitable bottom formwork platform 6 according to the pouring area. The middle span pouring section adopts an integral steel plate structure bottom formwork platform, and the side span pouring section adopts a segmented frame structure bottom formwork platform with side formwork. The bottom formwork platform is installed on the connecting device on the top of the temporary frame 5.

[0045] Working principle:

[0046] 1. After the mobile trolley is assembled, conduct a comprehensive inspection of all components to ensure that all connections are secure and that all cylinders, motors and other equipment are installed correctly and without damage.

[0047] 2. Start the drive motor, test the operation of the walking wheels 9, check whether the mobile trolley can move smoothly and whether the walking direction is accurate, and at the same time test whether the walking speed meets the construction requirements.

[0048] 3. Operate the bottom lifting cylinder 2 and the top lifting cylinder 4 to test the lifting function of the horizontal cylinder 1 and the longitudinal beam 7 respectively, check whether the lifting process is smooth and whether there is any jamming, and measure whether the lifting height meets the adjustment range required for construction.

[0049] 4. Start the horizontal cylinder 1 to test the horizontal adjustment function of the moving trolley, observe whether the moving trolley can move flexibly in the horizontal direction, and whether the adjustment accuracy meets the requirements of template positioning.

[0050] 5. Check whether the connection between the temporary frame 5 and the bottom formwork platform 6 is firm, and whether the structure of the bottom formwork platform 6 is stable. In particular, for the segmented frame structure with side formwork in the side span pouring section, ensure that the side formwork is installed firmly and there is no risk of grout leakage.

[0051] 6. According to the construction plan, move the mobile trolley to the construction position of the post-cast section 13 of the bridge 12 using the traveling wheels 9. During the movement, pay attention to the surrounding environment to ensure construction safety. After reaching the designated position, adjust the bottom lifting cylinder 2 and the support leg 8 to lower the horizontal cylinder 1 and the mobile trolley respectively, and let the support leg 8 support the mobile trolley. At this time, the traveling wheels 9 are in a free state. Use the horizontal cylinder 1 to adjust the position of the mobile trolley to ensure that the bottom formwork platform 6 and the post-cast section 13 of the bridge 12 are precisely aligned.

[0052] 7. For the mid-span pouring section, use the connecting device at the top of the temporary frame 5 to fix the bottom formwork platform 6 of the integral steel plate structure, and adjust the height and level of the bottom formwork platform according to the design requirements; for the side span pouring section, install the segmented frame structure bottom formwork platform with side formwork section by section on the temporary frame. After the connection is firm, carefully adjust the position and angle of each section of the bottom formwork platform to ensure that the side formwork fits tightly with the bridge structure and prevent grout leakage during the pouring process.

[0053] 8. After the formwork installation and adjustment are completed and inspected and approved, concrete pouring operations are carried out. Construction personnel climb onto the support beam 10 and then enter the area above the bottom formwork platform 6 to carry out concrete pouring operations. During the pouring process, the position and height of the moving trolley are adjusted in a timely manner according to the progress and requirements of concrete pouring to ensure the continuity and uniformity of concrete pouring. For example, if the bottom formwork platform 6 is found to sink or shift during the pouring process, it can be adjusted in time by using the top lifting cylinder 4.

[0054] 9. After the pouring is completed, the top lifting cylinder 4 falls back, lowering the longitudinal beam 7, pad beam 10, temporary frame 5, and bottom formwork platform together to below the lowest elevation of the post-pouring section; then the bottom lifting cylinder 2 retracts to disengage the horizontal cylinder 1, the support leg 8 slowly retracts, and the moving trolley is gradually lowered until the traveling wheel 9 supports the entire moving trolley, then it retracts 2cm to be in a disengaged state; then the drive motor on the traveling wheel 9 drives the entire moving trolley to move and construct the next post-pouring section 13.

[0055] While the present invention has been disclosed above, it is not limited thereto. Any person skilled in the art can make various modifications and alterations without departing from the spirit and scope of the present invention; therefore, the scope of protection of the present invention should be determined by the scope defined in the claims.

Claims

1. A mobile trolley suitable for the post-cast section construction of double-deck, double-span bridges, characterized in that: The system includes a support frame with several support legs evenly distributed at its bottom. Several traveling wheels are also installed at intervals at the bottom of the support frame and beside the support legs, with the traveling wheels and support legs on the same horizontal axis. Connectors are provided on the side of the support frame, with the outer bottom end of the connector connected to the top of the bottom lifting cylinder. The bottom of the bottom lifting cylinder is connected to the top of the horizontal cylinder. A top lifting cylinder and a longitudinal beam are sequentially fixed on the top of the support frame. The top lifting cylinder can push the longitudinal beam to move up and down. A pad beam is provided on the top of the longitudinal beam.

2. The mobile trolley for post-cast section construction of double-layer, double-span bridges according to claim 1, characterized in that: A temporary frame for supporting the construction of the post-cast section is set on the pad beam, and a bottom formwork platform is set on the top of the temporary frame. The structure of the bottom formwork platform is different in different locations.

3. The mobile trolley for post-cast section construction of double-layer, double-span bridges according to claim 2, characterized in that: The bottom formwork platform is divided into the middle span pouring section and the side span pouring section according to the pouring area. The bottom formwork platform of the middle span pouring section is an integral steel plate structure, while the bottom formwork platform of the side span pouring section is a segmented frame structure with side formwork.

4. The mobile trolley for post-cast section construction of double-layer, double-span bridges according to claim 1, characterized in that: The support legs are height-adjustable, and the top of the support legs is fixedly connected to the bottom of the support frame.

5. The mobile trolley for post-cast section construction of double-deck, double-span bridges according to claim 1, characterized in that: A drive motor is installed inside the walking wheels.

6. The mobile trolley for post-cast section construction of double-layer, double-span bridges according to claim 1, characterized in that: The support frame is a frame structure, which is made up of multiple horizontal and vertical steel beams welded or bolted together. The longitudinal beams and pad beams are all steel structural members made of I-beams or channel steel. The longitudinal beams and pad beams are arranged perpendicularly to each other and serve as the load-bearing structure and construction platform of the temporary frame.

7. The mobile trolley for post-cast section construction of double-layer, double-span bridges according to claim 1, characterized in that: The temporary frame is a detachable structure, consisting of multiple standard rods connected by bolts. The standard rods are made of aluminum alloy. The top of the temporary frame is equipped with a connecting device for fixing the bottom formwork platform. The connecting device consists of slots or bolt holes.

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