A cap beam construction system and method

Abstract

The present invention discloses a cap beam construction system and method, comprising a template system, a construction platform system and a support system, wherein the template system is arranged on the construction platform, the support system is arranged above the bridge pier, and embedded parts are arranged in the bridge pier, and the embedded parts are used to install the support system; a lifting mechanism for lifting the construction platform system is arranged on the support system, so that the construction platform system can move along the length direction of the bridge pier, and the support system can be used to stably support the construction platform system after it is lifted into place; the cap beam construction system in this scheme can assemble the construction platform system on the ground along the size of the bridge pier, and then lift the construction platform system through the lifting mechanism of the support system, when lifted to a predetermined position, fix the construction platform system and the support system, and then assemble the template system, and pour concrete to prepare the cap beam, and through this scheme, the time for assembling the construction platform system at high altitude can be reduced.

Description

Technical Field

[0001] The invention relates to the technical field of bridge construction, and in particular to a cap beam construction system and method. Background Art

[0002] Highway bridges are generally columnar piers. Depending on the width of the bridge, the piers are usually double or triple columns. Due to the small diameter of the piers and the large spacing between the piers, it is necessary to use hoops or set up supports for the construction of the cap beam. At present, hoops are generally used for construction. When hoops are used for construction, the traditional method is generally to place sand cylinders, jacks or triangular pull blocks on the hoop legs, and then install I-beams longitudinally on the above components to form a longitudinal support system. The above-mentioned methods of erecting longitudinal and transverse beam support brackets have defects such as long installation and dismantling time, continuous high-altitude operations, many high-altitude hoisting times, and low platform stability. Summary of the invention

[0003] The purpose of the present invention is to provide a cap beam construction system and method to solve the problems in the prior art of erecting longitudinal and transverse beam support brackets, such as long installation and dismantling time, continuous high-altitude operations, multiple high-altitude hoisting times, and low platform stability.

[0004] The present invention is achieved through the following scheme:

[0005] A cap beam construction system includes a formwork system, a construction platform system and a support system, wherein the construction platform system is arranged around a bridge pier, the formwork system is arranged on the construction platform, the support system is arranged above the bridge pier, and embedded parts are arranged in the bridge pier, and the embedded parts are used to install the support system; a lifting mechanism for lifting the construction platform system is arranged on the support system, so that the construction platform system can move along the length direction of the bridge pier, and the support system can be used to stably support the construction platform system after it is lifted into place.

[0006] Based on the structure of the above-mentioned cap beam construction system, the support system includes a vertical frame, a main truss and a control system; the vertical frame is provided with a connecting portion connected to the embedded parts in the pier, the main truss is connected to the vertical frame, the lifting mechanism is arranged on the main truss, and the control system is communicatively connected with the lifting mechanism.

[0007] Based on the structure of the cap beam construction system, the lifting mechanism is symmetrically arranged along the connecting line direction of the bridge piers to be constructed, and at least 4 are arranged. Each lifting mechanism is provided with a hook, and is connected to the construction platform system through the hook; the lifting mechanism includes a guide groove, a connector, a lifting motor, a steel rope, a hook and a walking part; the guide groove is symmetrically arranged along the length direction of the connector, the lifting motor is arranged on the connector, the steel rope is connected to the output end of the lifting motor, and the hook is arranged on the steel rope. A guide rail is arranged on the main truss 4, the shape and size of the guide rail are adapted to the guide groove, the guide groove can move along the length direction of the guide rail, and the walking part is arranged on the connector; the walking part includes a walking tooth and a locking part, the main truss is provided with a rack matching the walking tooth, the walking wheel can be driven to move along the length direction of the rack, and the locking part can lock the position of the connector; the locking part protects the telescopic part, the main truss is provided with a locking hole matching the telescopic part, and the telescopic part locks the lifting mechanism after passing through the locking hole.

[0008] Based on the structure of the above-mentioned cap beam construction system, the construction platform system includes a longitudinal beam, a transverse beam, a walking platform and a railing. The longitudinal beam is arranged parallel to the connecting direction of the piers to be constructed, and a buffer portion is also arranged on the contact portion between the construction platform system and the pier; the buffer portion is arranged on the contact portion between the longitudinal beam and the pier; the transverse beam is arranged on the longitudinal beam, and the walking platform is arranged on the transverse beam, and the walking platform is arranged in a ring along the outer circle of the piers to be constructed.

[0009] Based on the structure of the cap beam construction system, the buffer part is an axle-shaped roller, and at least two axle-shaped rollers are arranged along the width direction of the longitudinal beam, and the edges of the axle-shaped rollers protrude from the boundaries of the longitudinal beam.

[0010] Based on the structure of the above-mentioned cap beam construction system, the rotating shaft of the shaft-type roller is fixed in the length direction of the longitudinal beam, so that the shaft-type roller can rotate along the width direction of the longitudinal beam. Tie rods are arranged between adjacent longitudinal beams, and the spacing between adjacent tie rods is slightly larger than the diameter of the bridge.

[0011] Based on the structure of the above-mentioned cap beam construction system, the formwork system includes a bottom formwork, a side formwork and an end formwork; the bottom formwork is arranged on the cross beam, and an opening for the pier to pass through is arranged on the bottom formwork, the end formwork is arranged on both sides of the length direction of the bottom formwork, and the side formwork is arranged on both sides of the width direction of the bottom formwork, and the bottom formwork, side formwork and end formwork as a whole form a cavity structure for casting the cap beam.

[0012] The present invention provides a cap beam construction method, which is characterized by:

[0013] Step 1: During the concrete pouring construction on the top of the pier, embed the embedded parts on the top of the pier;

[0014] Step 2: Assemble the construction platform system around the bridge pier on the ground;

[0015] Step 3: Installing a formwork system on the construction platform system;

[0016] Step 4: Install and build the support system on top of the pier;

[0017] Step 5: Using the support system to hoist the construction platform system and the formwork system as a whole;

[0018] Step 6: Use the support system to lock and stabilize the construction platform system to achieve the first force system conversion;

[0019] Step 7: pouring concrete and curing;

[0020] Step 8: Unlock the construction platform system to realize the second force system conversion, and use the support system to hoist the construction platform system and the formwork system to the ground as a whole;

[0021] Step 9: Dismantle the formwork system and construction platform system;

[0022] Step 10: Dismantle and lift the support system.

[0023] The specific steps of step two are: assemble the longitudinal beams in sequence on the ground of the piers to be constructed, and limit the piers through adjacent pull rods so that the shaft-shaped rollers on the longitudinal beams are in contact with the surface of the piers, and then arrange the cross beams in sequence along the length direction of the longitudinal beams. After the cross beams are arranged, assemble the bottom formwork between the piers to be constructed on the cross beams so that the openings on the bottom formwork match the positions of the piers, and then arrange the walking platform and railings around the piers to be constructed; the specific steps of step five are: connect the hooks of multiple lifting mechanisms with the cross beams adjacent to their lower sides, start the control system of the lifting mechanism, and move the construction platform system and the template system along the length direction of the piers through the lifting mechanism. During the movement, the shaft-shaped rollers of the longitudinal beams are always in contact with the surface of the piers.

[0024] The specific method of step six is: adjust the elevation of the bottom formwork on the construction platform system, fix the longitudinal beam, cross beam and main truss with fixings, and then loosen the hook of the lifting mechanism from the cross beam to realize the first force system conversion. At this time, the support structure formed by the upright frame, main truss and pier supports the construction platform system; the specific steps of step eight are to connect the hook of the lifting mechanism to the corresponding position of the cross beam again, remove the fixings, and untie the longitudinal beam and cross beam from the main truss respectively. At this time, the weight of the construction platform system is again supported by the upright frame and lifting mechanism to realize the second force system conversion.

[0025] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0026] 1. The cap beam construction system in this scheme can assemble the construction platform system on the ground along the size of the bridge pier, and then lift the construction platform system through the lifting mechanism of the support system. When lifted to the predetermined position, the construction platform system and the support system are fixed, and then the formwork system is assembled and concrete is poured to prepare the cap beam. Through this scheme, the time for assembling the construction platform system at high altitude can be greatly reduced, and most of the construction work steps can be carried out on the ground, which reduces the danger of the entire cap beam construction process. At the same time, most of the entire construction process adopts mechanized operations, which can greatly reduce the construction time and reduce labor costs.

[0027] 2. In the cap beam construction method of this scheme, most of the operations are completed with the assistance of mechanization, which greatly reduces the intensity of manual labor. At the same time, through the conversion of the force system twice in this process, the construction platform system can be quickly installed, positioned, and disassembled and lowered, which increases the flexibility of this process, reduces the use of lifting equipment, and saves the overall assembly time. At the same time, this process is equipped with axial rollers, which can effectively protect the surface of the pier. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a side structural schematic diagram of the cap beam construction system in the present invention;

[0029] Figure 2 It is a schematic diagram when the lifting mechanism pulls the construction platform system to a predetermined position;

[0030] Figure 3 It is a top view structural schematic diagram of the cap beam construction system in the present invention;

[0031] Figure 4 It is a structural schematic diagram of the template system in the present invention;

[0032] Description of the drawings: 1. Lifting mechanism; 2. Buffer part; 3. Vertical frame; 4. Main truss; 5. Connecting part; 6. Longitudinal beam; 7. Cross beam; 8. Walking platform; 9. Handrail; 10. Pull rod; 11. Bottom form; 12. Side form; 13. End form; 14. Pier; 15. Guide groove; 16. Connector; 17. Lifting motor; 18. Steel rope; 19. Guide rail; 20; Walking teeth; 21. Rack; 22. Telescopic part; 23. Locking hole. DETAILED DESCRIPTION

[0033] All features disclosed in this specification, or steps in all methods or processes disclosed, except mutually exclusive features and / or steps, can be combined in any manner.

[0034] Any feature disclosed in this specification (including any additional claims and abstract), unless otherwise stated, may be replaced by other alternative features that are equivalent or have similar purposes. That is, unless otherwise stated, each feature is only an example of a series of equivalent or similar features.

[0035] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by the terms "up", "down", "left", "right", 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, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0036] In addition, the terms "first", "second", etc. are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first", "second", etc. may explicitly or implicitly include one or more of the features.

[0037] Example 1

[0038] like Figures 1 to 4 As shown, the present invention provides a technical solution:

[0039] A cap beam construction system, which at least includes but is not limited to a formwork system, a construction platform system and a support system, wherein the support system is connected to a bridge pier 14, the construction platform system is arranged around the bridge pier 14, and the formwork system is arranged on the construction platform. Specifically, the support system is arranged above the bridge pier, and embedded parts are arranged in the bridge pier, and the embedded parts are used to install the support system. A lifting mechanism 1 for lifting the construction platform system is arranged on the support system, so that the construction platform system can move along the length direction of the bridge pier 14, and the support system can be used to stably support the construction platform system after it is lifted into place.

[0040] Based on the above structure, the construction platform system can be assembled on the ground along the size of the bridge pier 14, and then the construction platform system can be lifted by the lifting mechanism 1 of the support system. When lifted to the predetermined position, the construction platform system and the support system are fixed, and then the formwork system is assembled, and concrete is poured to prepare the cap beam. Through this solution, the time for assembling the construction platform system at high altitude can be greatly reduced, and most of the construction work steps can be carried out on the ground, reducing the danger of the entire cap beam construction process. At the same time, most of the entire construction process adopts mechanized operations, which can greatly reduce construction time and reduce labor costs.

[0041] As an example, the support system may include a frame 3, a main truss 4 and a control system; the frame 3 is provided with a connecting portion 5 connected to the embedded parts in the pier 14, the main truss 4 is connected to the frame 3, the lifting mechanism 1 is arranged on the main truss 4, and the control system is communicatively connected to the lifting mechanism 1.

[0042] Based on the above structure, the frame 3 forms a stable supporting structure with the pier 14 through the connecting part 5, which is used to provide supporting force when lifting the construction platform system. The construction platform system can be lifted by the lifting mechanism 1, and then the construction platform system is tied and fixed to the main truss 4 to achieve the fixation of the construction platform system. The connecting part can be a connecting bolt or a connecting screw hole, and a stable structure can be formed by fixing the prefabricated parts prefabricated in the pier.

[0043] As an example, the lifting mechanisms 1 are symmetrically arranged along the length direction of the main truss 4, and are arranged in at least four numbers. Each lifting mechanism 1 is provided with a hook, which is connected to the construction platform system through the hook. At least four hooks can stably lift and lower the construction platform system.

[0044] Specifically, the lifting mechanism may include a guide groove 15, a connector 16, a lifting motor 17, a steel rope 18, a hook and a walking part; the guide groove 15 is symmetrically arranged along the length direction of the connector 16, the lifting motor 17 is arranged on the connector 16, the steel rope 18 is connected to the output end of the lifting motor 17, and the hook is arranged on the steel rope 18. A guide rail 19 is arranged on the main truss 4, the shape and size of the guide rail 19 are adapted to the guide groove 15, the guide groove 15 can move along the length direction of the guide rail 19, and the walking part is arranged on the connector 16.

[0045] Based on the above structure, the walking part can drive the lifting mechanism as a whole to move to a certain extent along the length direction of the guide rail 19, and adjust the position of the hook in turn. The steel rope 18 can be retracted and released through the lifting motor 17 to realize external stretching operations.

[0046] As an example, the walking part may include walking teeth 20 and a locking part. A rack 21 matching the walking teeth 20 is provided on the main truss. The walking wheel can be driven to move along the length direction of the rack 21, and the locking part can lock the position of the connector 16.

[0047] The locking portion may include a telescopic portion 22 . A locking hole 23 matching the telescopic portion 22 is provided on the main truss. The telescopic portion 22 locks the lifting mechanism after passing through the locking hole 23 .

[0048] The telescopic portion 22 may be an electric telescopic tube, a telescopic air cylinder or a telescopic oil cylinder.

[0049] As an example, the construction platform system may include a longitudinal beam 6, a transverse beam 7, a walking platform 8 and a railing 9. The longitudinal beam 6 is arranged parallel to the connecting direction of the piers 14 to be constructed, and a buffer portion is also arranged on the contact portion between the construction platform system and the pier; the buffer portion 2 is arranged on the contact portion between the longitudinal beam 6 and the pier 14. During the process of lifting or lowering the construction platform system, the buffer portion 2 is always in contact with the surface of the pier 14 to prevent the longitudinal beam 6 from causing damage to the surface of the pier 14 during the movement.

[0050] The cross beam 7 is arranged on the longitudinal beam 6, and the cross beam 7 and the longitudinal beam 6 are connected as an integral unit through a connecting piece. The longitudinal beam 6 provides a paving space and a supporting structure for the cross beam 7. The cross beam 7 and the longitudinal beam form a stable frame structure on the plane along the pier 14. During assembly, the cross beam 7 is arranged to avoid the pier 14 so that the entire frame structure can completely wrap the pier 14.

[0051] The walking platform is arranged on the cross beam 7 and is fixedly connected to the cross beam 7. The walking platform is arranged in a ring along the outer circle of the piers 14 to be constructed. For example, when there are two piers 14, the walking platform is arranged along the outer circle of the two piers 14 to form a closed-loop passage wrapping the two piers 14; when there are three piers 14, the walking platform is arranged along the outer circle of the three piers 14 to form a closed-loop passage wrapping the three piers 14; the operating personnel can work on the walking platform.

[0052] As an example, the buffer part 2 can be an axial roller, and at least two axial rollers are arranged along the width direction of the longitudinal beam 6, and the edges of the axial rollers protrude from the boundary of the longitudinal beam 6, so that when the longitudinal beam 6 contacts the pier 14, the axial rollers are always in contact with the pier 14 to protect it.

[0053] As an example, the rotating shaft of the axial roller is fixed in the length direction of the longitudinal beam 6, so that the axial roller can rotate along the width direction of the longitudinal beam 6, and finally the longitudinal beam 6 can be more stable when rolling on the bridge pier 14.

[0054] As an example, the railing 9 is arranged along the edge of the walking platform, and the railing 9 is arranged perpendicular to the walking platform. The railing 9 can prevent the construction workers from falling from the walking platform, providing them with safety protection.

[0055] As an example, tie rods 10 are provided between adjacent longitudinal beams 6, and the spacing between adjacent tie rods 10 is slightly larger than the diameter of the bridge.

[0056] Based on the above structure, the adjacent longitudinal beams 6 can be tightened by the pull rod 10, so that the axial rollers fit tightly against the surface of the pier 14, thereby improving the stability of the construction platform system during movement. At the same time, the pier 14 is limited by the pull rod 10 to prevent the longitudinal beam 6 from shaking left and right during movement.

[0057] As an example, the formwork system may include a bottom form 11, a side form 12 and an end form 13; the bottom form 11 is arranged on the cross beam 7, and an opening is provided on the bottom form 11 for the pier 14 to pass through, so that the cap beam can form an integrated structure with the pier 14 after casting is completed.

[0058] The end molds 13 are arranged on both sides of the length direction of the bottom mold 11, and the side molds 12 are arranged on both sides of the width direction of the bottom mold 11. The bottom mold 11, the side molds 12 and the end molds 13 form a cavity structure for casting the cap beam as a whole.

[0059] Through the cap beam construction system, the cap beam can be cast and constructed quickly, stably, efficiently and safely without causing damage to the side wall of the pier 14.

[0060] Example 2

[0061] Based on the construction system of the above-mentioned embodiment 1, this embodiment provides a cap beam construction method, which is specifically as follows:

[0062] Step 1: When pouring concrete on the top of the pier 14, embed embedded parts on the top of the pier 14; the embedded parts can be nuts or sleeves, and 3 or 4 embedded parts are reserved for each pier 14, arranged in an equilateral triangle or square, which is convenient for fixing with the later frame 3.

[0063] Step 2: Assemble the construction platform system around the pier 14 on the ground; assemble the longitudinal beams 6 on the ground of the piers 14 to be constructed in sequence, and limit the piers 14 through the adjacent pull rods 10, so that the axial rollers on the longitudinal beams 6 are in contact with the surface of the piers 14, and then arrange the cross beams 7 along the length direction of the longitudinal beams 6 in sequence. After the cross beams 7 are arranged, the bottom mold 11 is assembled on the cross beams 7 between the piers 14 to be constructed, so that the opening on the bottom mold 11 matches the position of the piers 14, and then the walking platform and handrails 9 are arranged around the piers 14 to be constructed.

[0064] Step 3: Install the formwork system on the construction platform system; fix the frame 3 of the support system in the embedded part on the top of the pier 14 through the connecting part 5, so that the frame 3 and the pier 14 form a stable supporting structure, then hoist the main truss 4 and connect it to the frame 3, and install the lifting mechanism 1 on the main truss 4.

[0065] Step 4: Install and build the support system on the top of the pier by fixing the support system to the embedded parts.

[0066] Step 5: Use the support system to lift the construction platform system and the formwork system as a whole; connect the hooks of multiple lifting mechanisms 1 to the crossbeam 7 adjacent to their lower sides, start the control system of the lifting mechanism 1, and move the construction platform system and the formwork system along the length direction of the pier 14 through the lifting mechanism 1. During the movement, the axial rollers of the longitudinal beam 6 are always in contact with the surface of the pier 14.

[0067] Step 6: Use the support system to lock and stabilize the construction platform system to achieve the first force system conversion, adjust the elevation of the bottom formwork 11 on the construction platform system, fix the longitudinal beam 6, the cross beam 7 and the main truss 4 with fixing parts, and then loosen the hook of the lifting mechanism 1 and the cross beam 7 to achieve the first force system conversion. At this time, the support structure formed by the vertical frame 3, the main truss 4 and the bridge pier 14 supports the construction platform system. After locking, the template is hoisted, and the template parts of the end formwork 13 and the side formwork 12 are directly lifted by the lifting mechanism 1, and the end formwork 13 and the side formwork 12 are assembled along the circumferential position of the bottom formwork 11. This solution does not require the assistance of a crane, and its construction system can efficiently, autonomously and flexibly lift the remaining templates, increase the versatility of the lifting mechanism 1, and save the overall construction operation time.

[0068] Step seven: pouring concrete and curing: pouring concrete in the cavity formed by the bottom mold 11, the end mold 13 and the side mold 12, and curing the cast cap beam structure.

[0069] Step 8: Unlock the construction platform system; connect the hook of the lifting mechanism 1 to the corresponding position of the cross beam 7 again, remove the fixing parts, and untie the longitudinal beam 6 and the cross beam 7 from the main truss 4 respectively. At this time, the weight of the construction platform system is supported by the frame 3 and the lifting mechanism 1 again, realizing the second force system conversion.

[0070] Step 9: Disassemble the formwork system and the construction platform system; use multiple lifting mechanisms 1 to synchronously lower the construction platform system horizontally. When the construction platform system is no more than 5 cm above the ground, remove the bottom form 11. After the bottom form 11 falls on the beam 7, the construction platform system and the bottom form 11 are synchronously lowered to the ground. When the concrete strength of the cap beam structure reaches the predetermined requirement, the end form 13 and the side form 12 are pulled and removed by the lifting mechanism 1.

[0071] Step 10: Disassemble and hoist the support system. After transporting the construction platform system, disconnect the hook of the lifting mechanism 1 from the crossbeam 7 and lift the hook to reset it. Finally, use the lifting equipment to lift the disassembled lifting mechanism 1, main truss 4, and vertical frame 3 to the ground.

[0072] In this process method, most of the operations are completed with the assistance of mechanization, which greatly reduces the intensity of manual labor. At the same time, through the conversion of two force systems in this process, the construction platform system can be quickly installed, positioned, and disassembled and lowered, which increases the flexibility of this process, reduces the use of lifting equipment, and saves the overall assembly time. At the same time, axial rollers are provided in this process to effectively protect the surface of the pier 14.

[0073] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A cap beam construction method of a cap beam construction system, characterized in that: The cap beam construction system includes a formwork system, a construction platform system and a support system. The construction platform system is arranged around the bridge pier, the formwork system is arranged on the construction platform, the support system is arranged above the bridge pier, and embedded parts are arranged in the bridge pier, and the embedded parts are used to install the support system; a lifting mechanism for lifting the construction platform system is arranged on the support system, so that the construction platform system can move along the length direction of the bridge pier, and the support system can be used to stably support the construction platform system after it is lifted into place; The support system includes a stand, a main truss and a control system; the stand is provided with a connection portion connected to the embedded parts in the pier, the main truss is connected to the stand, the lifting mechanism is provided on the main truss, and the control system is connected to the lifting mechanism in communication; The lifting mechanism is symmetrically arranged along the connecting direction of the piers to be constructed, and at least 4 of them are arranged. Each lifting mechanism is provided with a hook, which is connected to the construction platform system through the hook; the lifting mechanism includes a guide groove, a connector, a lifting motor, a steel rope, a hook and a walking part; the guide groove is symmetrically arranged along the length direction of the connector, the lifting motor is arranged on the connector, the steel rope is connected to the output end of the lifting motor, and the hook is arranged on the steel rope; a guide rail is arranged on the main truss, the shape and size of the guide rail are adapted to the guide groove, the guide groove can move along the length direction of the guide rail, and the walking part is arranged on the connector; the walking part includes a walking tooth and a locking part, a rack matching the walking tooth is arranged on the main truss, the walking wheel can be driven to move along the length direction of the rack, and the locking part can lock the position of the connector; the locking part protects the telescopic part, a locking hole matching the telescopic part is arranged on the main truss, and the telescopic part locks the lifting mechanism after passing through the locking hole; The construction platform system includes a longitudinal beam, a transverse beam, a walking platform and a handrail. The longitudinal beam is arranged parallel to the connecting direction of the piers to be constructed. A buffer is also arranged on the contact part between the construction platform system and the piers. The buffer is arranged on the contact part between the longitudinal beam and the piers. The transverse beam is arranged on the longitudinal beam, and the walking platform is arranged on the transverse beam. The walking platform is arranged in a ring shape along the outer circle of the piers to be constructed. The construction method of cap beam is as follows: Step 1: During the concrete pouring construction on the top of the pier, embed the embedded parts on the top of the pier; Step 2: Assemble the construction platform system around the bridge pier on the ground; Step 3: Installing a formwork system on the construction platform system; Step 4: Install and build the support system on top of the pier; Step 5: Using the support system to hoist the construction platform system and the formwork system as a whole; Step 6: Use the support system to lock and stabilize the construction platform system to achieve the first force system conversion; specifically, adjust the bottom formwork elevation on the construction platform system, fix the longitudinal beam, cross beam and main truss with fixing parts, and then loosen the hook of the lifting mechanism from the cross beam to achieve the first force system conversion. At this time, the support structure formed by the upright frame, main truss and pier supports the construction platform system, and after locking, the end formwork and side formwork in the formwork system are hoisted by the lifting mechanism; Step 7: pouring concrete and curing; Step 8: Unlock the construction platform system to achieve the second force system conversion, and use the support system to hoist the construction platform system and the formwork system to the ground as a whole; specifically, connect the hook of the lifting mechanism to the corresponding position of the beam again, remove the fixing parts, and untie the longitudinal beam and the cross beam from the main truss respectively. At this time, the weight of the construction platform system is supported by the frame and the lifting mechanism again, and the second force system conversion is achieved; Step 9: Dismantle the formwork system and construction platform system; Step 10: Dismantle and lift the support system.

2. The cap beam construction method according to claim 1, characterized in that: The buffer part is an axle-shaped roller, and at least two axle-shaped rollers are arranged along the width direction of the longitudinal beam, and the edges of the axle-shaped rollers protrude from the boundary of the longitudinal beam.

3. The cap beam construction method according to claim 2, characterized in that: The rotating shaft of the shaft-shaped roller is fixed in the length direction of the longitudinal beam, so that the shaft-shaped roller can rotate along the width direction of the longitudinal beam. Tie rods are arranged between adjacent longitudinal beams, and the spacing between adjacent tie rods is slightly larger than the diameter of the bridge.

4. The cap beam construction method according to claim 2, characterized in that: The specific steps of step two are to assemble the longitudinal beams in sequence on the ground of the piers to be constructed, and limit the piers through adjacent pull rods so that the shaft-shaped rollers on the longitudinal beams are in contact with the surface of the piers, and then arrange the cross beams in sequence along the length direction of the longitudinal beams. After the cross beams are arranged, the bottom formwork is assembled between the piers to be constructed on the cross beams so that the openings on the bottom formwork match the positions of the piers, and then a walking platform and railings are arranged around the piers to be constructed; the specific steps of step five are to connect the hooks of multiple lifting mechanisms with the cross beams adjacent to their lower sides, start the control system of the lifting mechanism, and move the construction platform system and the template system along the length direction of the piers through the lifting mechanism. During the movement, the shaft-shaped rollers of the longitudinal beams are always in contact with the surface of the piers.

5. The cap beam construction method according to any one of claims 1 to 3, characterized in that: The formwork system includes a bottom form, a side form and an end form; the bottom form is arranged on the cross beam, and an opening for the bridge pier to pass through is arranged on the bottom form, the end form is arranged on both sides of the length direction of the bottom form, and the side form is arranged on both sides of the width direction of the bottom form, and the bottom form, side form and end form as a whole form a cavity structure for casting the cap beam.

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