Bridge bearing platform construction device and construction method thereof

Abstract

The invention provides a bridge bearing platform construction device and a construction method thereof.The bridge bearing platform construction device comprises a reinforcing mesh frame and a bearing platform steel formwork frame, the radial periphery of the reinforcing mesh frame is annularly sleeved with the bearing platform steel formwork frame, and sleeve assemblies are arranged at the longitudinal and transverse opposite ends of the bearing platform steel formwork frame in an array and penetrating mode; the two ends of the sleeve assembly extend out of the bearing platform steel formwork frame correspondingly, lifting supporting assemblies are arranged between the upper end and the lower end of the interior of the reinforcing mesh frame at intervals in an array mode, transverse beam sets are transversely arranged at the upper end of the bearing platform steel formwork frame at intervals in an array mode, and longitudinal beam sets are longitudinally arranged on the adjacent pair of transverse beam sets at intervals. Suspender assemblies are arranged on the transverse beam groups and the longitudinal beam groups in an array mode, and the lower ends of the suspender assemblies hoist the upper end of the reinforcing mesh frame.

Description

Technical Field

[0001] The invention belongs to the technical field of bridge engineering, and in particular relates to a bridge cap construction device and a construction method thereof. Background Art

[0002] During the construction of bridge piers, the steel mesh frame needs to be pre-supported and fixed inside when it is tied, and then the pier steel formwork is spliced ​​and fixed on the outer periphery of the steel mesh frame. The traditional method is to weld steel bars inside the steel mesh frame for support, and fix the pier steel formwork by welding steel bars after splicing. These steel bars are temporary steel bars and cannot be removed after pouring concrete, resulting in a waste of resources. Summary of the invention

[0003] In order to solve the above-mentioned technical problems, the purpose of the present invention is to provide a bridge pedestal construction device and a construction method thereof, which realizes temporary support of the steel mesh frame and temporary fixation of the pedestal steel formwork frame through a liftable lifting support assembly and a detachable sleeve assembly. After the construction is completed, the lifting support assembly and the sleeve assembly can be disassembled and continued to be used, which effectively saves resources.

[0004] In order to achieve the above object, the technical solution adopted by the present invention is:

[0005] A bridge pedestal construction device comprises a steel mesh frame and a pedestal steel formwork frame, wherein the radial outer peripheral ring of the steel mesh frame is sleeved around the pedestal steel formwork frame, sleeve assemblies are arranged in an array at both longitudinal and transverse opposite ends of the pedestal steel formwork frame, and both ends of the sleeve assemblies extend out of the pedestal steel formwork frame respectively, and lifting support assemblies are arranged in an array between the upper and lower ends of the steel mesh frame, a transverse beam group is arranged in an array at transverse intervals at the upper end of the pedestal steel formwork frame, and a longitudinal beam group is arranged in a longitudinal interval on an adjacent pair of transverse beam groups, and a suspension rod assembly is arranged in an array on the transverse beam group and the longitudinal beam group, and the lower end of the suspension rod assembly suspends the upper end of the steel mesh frame.

[0006] Furthermore, the sleeve assembly includes a plastic sleeve, a steel wire rope, a steel wire rope pull rod and a locking nut, both ends of the plastic sleeve are embedded in the base steel formwork frame, both ends of the steel wire rope are connected to the steel wire rope pull rod, the steel wire rope and one end of the steel wire rope pull rod are sleeved in the plastic sleeve, the other end of the steel wire rope pull rod passes through the plastic sleeve and extends out of the base steel formwork frame, and the other end of the extended steel wire rope pull rod is sleeved with a locking nut that is abutted against the outer peripheral surface of the base steel formwork frame.

[0007] Furthermore, the sleeve assembly also includes a sealing joint, which is sleeved on the outer periphery of the plastic sleeve located inside the base steel formwork frame, and one end of the sealing joint is in contact with the inner circumference of the base steel formwork frame.

[0008] Furthermore, the lifting support assembly includes a support leg and a telescopic rod, the upper end of the support leg is connected to the lower end of the telescopic rod, the lower end of the support leg is arranged on the inner bottom surface of the steel mesh frame, and the upper end of the telescopic rod supports the inner top surface of the steel mesh frame.

[0009] Furthermore, the telescopic rod includes a sleeve and a screw rod, the lower end of the screw rod is movably connected to the inner periphery of the upper end of the sleeve, the lower end of the sleeve is connected to the supporting leg, and the upper end of the screw rod supports the inner periphery top surface of the steel mesh frame.

[0010] Furthermore, the transverse beam group includes a pair of transverse beams arranged at relative intervals, and the longitudinal beam group includes a pair of longitudinal beams arranged at relative intervals; the hanger assembly includes a pad, a hanger and a hanger nut, and the pads are arranged on a pair of the transverse beams or a pair of the longitudinal beams, the hanger is passed through the pad and both ends extend out of the pad, the lower end of the hanger is hung on the upper end of the steel mesh frame, and the upper end of the hanger is screwed to the hanger nut that abuts against the upper end surface of the pad.

[0011] Furthermore, the steel mesh frame includes a bottom steel mesh, a top steel mesh and a vertical steel mesh, the bottom steel mesh and the top steel mesh are arranged in parallel and spaced apart from each other, the vertical steel mesh is enclosed between the bottom steel mesh and the top steel mesh and its upper and lower ends are respectively connected to the edges of the bottom steel mesh and the top steel mesh; the lower end of the suspension rod assembly suspends the top steel mesh, and the lifting support assembly is vertically arranged between the bottom steel mesh and the top steel mesh.

[0012] Furthermore, the foundation steel formwork frame is formed by splicing and enclosing a number of foundation steel formworks.

[0013] Furthermore, a wire rope pulling machine is arranged on the peripheral ground of the foundation steel formwork, a support frame is arranged in the peripheral foundation pit of the foundation steel formwork, a guide wheel is arranged on the support frame, and the wire rope pulling machine is used to pull the wire rope through the guide wheel.

[0014] The present invention also provides a bridge cap construction method, which uses a bridge cap construction device of the present invention, comprising the following steps:

[0015] Step 1: Excavate and shape the foundation pit, break out the pile foundation steel cage pile head in the foundation pit, adjust the leaked pier body steel bars into a trumpet shape, and pour concrete in the foundation pit to form a concrete foundation;

[0016] Step 2: Tie the bottom steel mesh of the steel mesh frame on the concrete foundation, place a lifting support assembly on the bottom steel mesh, tie the top steel mesh of the steel mesh frame on the lifting support assembly, and tie the vertical steel mesh of the steel mesh frame between the bottom steel mesh and the top steel mesh;

[0017] Step 3: splicing the cap steel formwork on the periphery of the steel mesh frame to form a cap steel formwork frame, and fixing the cap steel formwork frame by arraying nested sleeve assemblies on a pair of the cap steel formworks opposite to each other on both sides of the cap steel formwork frame;

[0018] Step 4: sequentially erecting a transverse beam group and a longitudinal beam group on the cap steel formwork frame, installing sleeve assemblies on the transverse beam group and the longitudinal beam group to suspend and fix the top steel mesh of the steel mesh frame;

[0019] Step 5: Adjust the height of the lifting support assembly to lower it and take it out of the steel mesh frame, and pour concrete in the cap steel formwork frame;

[0020] Step 6: After the concrete solidifies, disassemble the sleeve assembly and the foundation steel formwork frame.

[0021] Due to the adoption of the above technical solution, the present invention has the following advantages and effects:

[0022] (1) The present invention provides a bridge pedestal reinforcement construction device and a construction method thereof. By using a sleeve assembly and a lifting support assembly, a reinforcement mesh frame and a pedestal steel formwork frame can be quickly fixed. This design simplifies the traditional welding connection support, reduces manpower requirements, and improves construction efficiency. At the same time, the design of the sleeve assembly and the lifting support assembly allows these components to be disassembled and reused after a casting is completed, thereby reducing material costs and saving resources.

[0023] (2) The present invention provides a bridge pedestal reinforcement construction device and a construction method thereof. The layout of the sleeve assembly and the tensioning mechanism ensure the stability of the pedestal steel formwork frame. The steel mesh frame is suspended stably during the construction process by the hanger assembly, thereby ensuring the structural safety during the concrete pouring process. At the same time, the lifting support assembly allows the height of the steel mesh frame to be adjusted according to actual needs, which provides flexibility for the construction of bridge pedestals of different sizes and shapes. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the main structure of the present invention.

[0025] Figure 2 It is a side view structural schematic diagram of the present invention.

[0026] The accompanying drawings are marked as follows: 1-base steel formwork, 2-transverse beam group, 3-longitudinal beam group, 4-longitudinal steel bars, 5-transverse steel bars, 6-pier body steel bars, 7-pad, 8-suspension rod, 9-clamp plate, 10-locking nut, 11-wire rope rod, 12-wire rope, 13-plastic sleeve, 14-sealing joint, 15-support frame, 16-guide wheel, 17-wire rope pulling machine, 18-support leg, 19-telescopic rod, 20-foundation pit, 21-concrete, 22-ground. DETAILED DESCRIPTION

[0027] The embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings so that the purpose, features and advantages of the present invention can be more clearly understood. It should be understood that the embodiments shown in the accompanying drawings are not intended to limit the scope of the present invention, but are only intended to illustrate the essential spirit of the technical solution of the present invention.

[0028] like Figure 1-Figure 2 The present invention provides a bridge pedestal construction device, comprising a steel mesh frame, a radial outer peripheral spacer ring of the steel mesh frame is sleeved with a pedestal steel formwork frame, sleeve assemblies are arranged in array at both longitudinal and transverse opposite ends of the pedestal steel formwork frame, and both ends of the sleeve assemblies extend out of the pedestal steel formwork frame respectively, a lifting support assembly is arranged in array between the upper and lower ends of the steel mesh frame, a transverse beam group 2 is arranged in array at the upper end of the pedestal steel formwork frame at transverse intervals, a longitudinal beam group 3 is arranged in longitudinal intervals on a pair of adjacent transverse beam groups 2, a suspension rod assembly is arranged in array on both the transverse beam group 2 and the longitudinal beam group 3, and the lower end of the suspension rod assembly suspends the upper end of the steel mesh frame.

[0029] Specifically, the foundation pit 20 is first excavated and formed on the construction ground 22, the pile foundation steel cage pile head is broken out, the pier body steel bars 6 are cleaned, straightened and moved into a trumpet shape, the design elevation is measured and the concrete foundation is poured, the construction device is placed on the concrete foundation, and after the foundation steel formwork frame is fixed by the construction device, the casing assembly and the lifting support assembly of the construction device can be disassembled, and then the concrete 21 is poured, and the disassembled casing assembly and lifting support assembly can be reused.

[0030] The steel mesh frame is a closed rectangular or cube frame body, and the cross section of the cap steel formwork frame is a rectangular or square closed ring structure, and the cap steel formwork frame is formed by splicing and enclosing a plurality of cap steel formworks 1. The outer peripheral spacing ring between the cap steel formwork frame and the steel mesh frame. The interior of the steel mesh frame is the pier body steel bar 6, and the pier body steel bar 6 extends out of the steel mesh frame. The steel mesh frame is formed by binding a plurality of transverse steel bars 5 and longitudinal steel bars 4.

[0031] The sleeve assembly is arranged in multiple layers in the longitudinal and transverse directions of the cap steel formwork frame, and each layer of the sleeve assembly is arranged at intervals. The longitudinal and transverse sleeve assemblies tighten and fix the outer periphery of the cap steel formwork frame. The outer periphery of the cap steel formwork frame is provided with tension holes, and the two ends of the sleeve assembly are nested in the tension holes, and the sleeve assembly passes through the steel mesh frame.

[0032] Furthermore, the sleeve assembly includes a plastic sleeve 13, a steel wire rope 12, a steel wire rope pull rod 11 and a locking nut 10. Both ends of the plastic sleeve 13 are embedded in the foundation steel formwork frame. Both ends of the steel wire rope 12 are connected to the steel wire rope pull rod 11. The steel wire rope 12 and one end of the steel wire rope pull rod 11 are sleeved in the plastic sleeve 13. The other end of the steel wire rope pull rod 11 passes through the plastic sleeve 13 and extends out of the foundation steel formwork frame. The other end of the extended steel wire rope pull rod 11 is sleeved with a locking nut 10, and one end of the locking nut 10 is abutted against the outer peripheral surface of the foundation steel formwork frame.

[0033] Specifically, both ends of the plastic sleeve 13 are nested in the tensioning holes, both ends of the steel wire rope 12 are welded to one end of the steel wire rope pull rod 11, and the other end of the steel wire rope pull rod 11 has an external thread on its outer periphery, which is threadedly connected to the locking nut 10 for locking. The steel wire rope pull rod 11 at both ends of the steel wire rope 12 is locked by the locking nut 10 to tighten and fix the opposite ends of the steel formwork frame of the base.

[0034] Furthermore, the sleeve assembly also includes a sealing joint 14, which is sleeved on the outer periphery of the plastic sleeve 13 located inside the base steel formwork frame, and one end of the sealing joint 14 is in contact with the inner peripheral surface of the base steel formwork frame.

[0035] Specifically, one end of the sealing joint 14 is in a bell-mouth shape, and the end of the bell-mouth fits the inner circumference of the steel formwork frame of the cap. The sealing joint 14 is located in the annular space between the steel formwork frame of the cap and the steel mesh frame. The sealing joint 14 is used to prevent concrete from penetrating into the gap between the plastic sleeve 13 and the steel formwork frame of the cap when pouring concrete 21.

[0036] Furthermore, the lifting support assembly includes a support leg 18 and a telescopic rod 19, the upper end of the support leg 18 is connected to the lower end of the telescopic rod 19, the lower end of the support leg 18 is arranged on the inner bottom surface of the steel mesh frame, and the upper end of the telescopic rod 19 supports the inner top surface of the steel mesh frame.

[0037] Specifically, the support leg 18 is a three-claw support structure or a multi-claw support structure with a support rod. The upper ends of the multiple support rods are hinged and connected to the telescopic rod 19. When the telescopic rod 19 is lifted upward, the support rods can shrink inward and become one. When the lower end of the support rod is supported, the lower end of the support rod can be freely opened to a certain angle to achieve fixation.

[0038] Furthermore, the telescopic rod 19 includes a sleeve and a screw rod, the lower end of the screw rod is movably connected to the inner circumference of the upper end of the sleeve, the lower end of the sleeve is connected to the support leg 18, and the upper end of the screw rod supports the inner circumference top surface of the steel mesh frame. The sleeve and the screw rod are threadedly connected, and the height of the telescopic rod 19 can be raised and lowered by rotating the screw rod forward and backward.

[0039] Of course, as a kind of preference, the telescopic rod 19 can also be selected as an electric telescopic rod or a hydraulic telescopic rod. At this moment, the telescopic rod does not need manual control.

[0040] Furthermore, the transverse beam group 2 includes a pair of transverse beams arranged at relative intervals, and the longitudinal beam group 3 includes a pair of longitudinal beams arranged at relative intervals; the suspension rod assembly includes a pad 7, a suspension screw rod 8 and a suspension rod nut, the pad 7 is arranged on a pair of transverse beams or a pair of longitudinal beams, the suspension screw rod 8 is passed through the pad 7 and both ends of the pad 7 extend out of the pad 7, the lower end of the suspension screw rod 8 is hung on the upper end of the steel mesh frame, the upper end of the suspension screw rod 8 is screwed on the suspension rod nut, and one end of the suspension rod nut is against the upper end surface of the pad 7.

[0041] Specifically, in the present invention, the length of the longitudinal beam is less than the length of the transverse beam. The transverse beam groups 2 are sequentially arranged at intervals at the longitudinal ends of the cap steel formwork frame, and the opposite ends of the cap steel formwork frame support the transverse beam groups 2. According to the length of the steel mesh frame, at least two groups of transverse beam groups 2 are arranged at both ends of the cap steel formwork frame, and at least two groups of longitudinal beam groups 3 are supported on each of the two groups of transverse beam groups 2. At least the two ends of the longitudinal beam group 3 are respectively provided with a suspension rod assembly, and the transverse beam group 2 is provided with a suspension rod assembly at intervals.

[0042] The pad 7 of the suspension rod assembly is supported on a pair of spaced transverse beams or longitudinal beams, and the hanging wire rod 8 extends downward through the gap between the pair of transverse beams or longitudinal beams and is hooked to the upper end of the steel mesh frame to suspend and fix the steel mesh frame. A suspension rod nut is sleeved on the upper end of the pad 7 to tighten the hanging wire rod 8.

[0043] Furthermore, the steel mesh frame includes a bottom steel mesh, a top steel mesh and a vertical steel mesh, and the bottom steel mesh, the top steel mesh and the vertical steel mesh are welded and tied by longitudinal steel bars 4 and transverse steel bars 5. The bottom steel mesh and the top steel mesh are arranged parallel and spaced apart from each other, and the vertical steel bars are arranged between the bottom steel mesh and the top steel mesh. The vertical steel mesh is enclosed at the edge of the bottom steel mesh and the top steel mesh, and its upper and lower ends are respectively connected to the edge of the bottom steel mesh and the top steel mesh to form a steel mesh frame. The hanging wire rod 8 at the lower end of the suspension rod assembly suspends the top steel mesh, and the lifting support assembly is vertically arranged between the bottom steel mesh and the top steel mesh. The bottom of the lifting support assembly is located on the concrete cushion layer of the space of the bottom steel mesh, and the top of the lifting support assembly supports the top steel mesh.

[0044] Furthermore, in order to facilitate the pulling out of the wire rope 12 and the wire rope pull rod 11, a wire rope pulling machine 17 is arranged on the outer peripheral ground 22 of the foundation steel formwork frame, and a support frame 15 is arranged in the foundation pit 20 on the outer periphery of the foundation steel formwork frame. A guide wheel 16 is arranged on the support frame 15, and the wire rope pulling machine 17 is used to pull the wire rope 12 through the guide wheel 16.

[0045] Specifically, during traction, a spare steel wire is provided on the wire rope pulling machine 17, and the spare steel wire is passed around the guide wheel 16 and connected to the wire rope pull rod 11 to pull the wire rope 12 and the wire rope pull rod 11. The support frame 15 is movably arranged on the concrete foundation of the outer periphery of the steel formwork frame of the foundation, and when it is necessary to pull out the wire rope 12 and the wire rope pull rod 11 at different positions, it is only necessary to move the support frame 15 to the corresponding position.

[0046] The present invention also provides a bridge cap construction method, which uses a bridge cap construction device of the present invention, comprising the following steps:

[0047] Step 1: Excavate the foundation pit 20, break the pile foundation steel cage pile head in the foundation pit 20, clean the pier body steel bars 6 of the leaked pile foundation steel cage pile head and adjust them into a trumpet shape, measure the design elevation and pour concrete 21 in the foundation pit 20 to form a concrete foundation.

[0048] Step 2: first place the bottom transverse steel bars 5 on the concrete foundation, place the bottom longitudinal steel bars 4 on the bottom transverse steel bars 5 and tie them with the bottom transverse steel bars 5 to form a bottom steel mesh;

[0049] A lifting support assembly is placed on the bottom steel mesh according to the design requirements, and the bottom of the lifting support assembly is located on the concrete cushion layer of the space of the bottom steel mesh; a support plate is placed on the upper end of the lifting support assembly, and the top-layer transverse steel bars 5 are placed on the support plate. The top-layer longitudinal steel bars 4 are placed on the top-layer transverse steel bars 5 and tied with the top-layer transverse steel bars 5 to form a top-layer steel mesh;

[0050] Vertical transverse steel bars 5 and vertical longitudinal steel bars 4 are tied to the outer peripheral edges of the bottom steel mesh and the top steel mesh to form a vertical steel mesh. The upper and lower ends of the vertical steel mesh are tied and connected to the bottom steel mesh and the top steel mesh respectively.

[0051] Step 3: Splice the cap steel formwork 1 on the periphery of the steel mesh frame to form a cap steel formwork frame, array nested sleeve components on a pair of cap steel formworks 1 on the horizontal and vertical sides of the cap steel formwork frame, and fix the cap steel formwork frame through the sleeve components after adjusting the linear position of the cap steel formwork 1;

[0052] Step 4: On the top of the pedestal steel formwork frame, set up the transverse beam group 2 and the longitudinal beam group 3 in sequence according to the design requirements, place the clamping plates 9 on the bottom of the transverse beam group 2 on both sides of the pedestal steel formwork 1, install the hanger assembly on the transverse beam group 2 and the longitudinal beam group 3, and suspend and fix the top steel mesh of the steel mesh frame through the hanger assembly.

[0053] Step 5: After adjusting the height of the lifting support assembly and lowering it, take it out from the mesh of the top steel mesh of the steel mesh frame, and pour concrete 21 in the cap steel formwork frame;

[0054] Step 6: After the concrete 21 solidifies, the sleeve assembly and the cap steel formwork frame are disassembled, the steel wire rope of the sleeve assembly is pulled out, and only the plastic sleeve 13 of the sleeve assembly is retained in the concrete 21.

[0055] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A bridge cap construction device, characterized in that: It includes a steel mesh frame and a base steel formwork frame, the radial outer periphery of the steel mesh frame is annularly sleeved around the base steel formwork frame, both longitudinal and transverse opposite ends of the base steel formwork frame are arrayed with sleeve assemblies, both ends of the sleeve assemblies respectively extend from the base steel formwork frame, lifting support assemblies are arrayed between the upper and lower ends of the steel mesh frame, a transverse beam group is arrayed at the upper end of the base steel formwork frame at transverse intervals, a longitudinal beam group is longitudinally intervally arranged on an adjacent pair of transverse beam groups, a suspension rod assembly is arrayed on the transverse beam group and the longitudinal beam group, and the lower end of the suspension rod assembly suspends the upper end of the steel mesh frame.

2. A bridge cap construction device according to claim 1, characterized in that: The sleeve assembly includes a plastic sleeve, a steel wire rope, a steel wire rope pull rod and a locking nut. Both ends of the plastic sleeve are embedded in the base steel formwork frame. Both ends of the steel wire rope are connected to the steel wire rope pull rod. The steel wire rope and one end of the steel wire rope pull rod are sleeved in the plastic sleeve. The other end of the steel wire rope pull rod passes through the plastic sleeve and extends out of the base steel formwork frame. The other end of the extended steel wire rope pull rod is sleeved with a locking nut that resists the outer peripheral surface of the base steel formwork frame.

3. A bridge cap construction device according to claim 2, characterized in that: The sleeve assembly also includes a sealing joint, which is sleeved on the outer periphery of a plastic sleeve located inside the base steel formwork frame, and one end of the sealing joint is in contact with the inner circumference of the base steel formwork frame.

4. A bridge cap construction device according to claim 1 or 2, characterized in that: The lifting support assembly includes a support leg and a telescopic rod, the upper end of the support leg is connected to the lower end of the telescopic rod, the lower end of the support leg is arranged on the inner circumferential bottom surface of the steel mesh frame, and the upper end of the telescopic rod supports the inner circumferential top surface of the steel mesh frame.

5. A bridge cap construction device according to claim 4, characterized in that: The telescopic rod includes a sleeve and a screw rod, the lower end of the screw rod is movably connected to the inner periphery of the upper end of the sleeve, the lower end of the sleeve is connected to the supporting leg, and the upper end of the screw rod supports the inner periphery top surface of the steel mesh frame.

6. A bridge cap construction device according to claim 5, characterized in that: The transverse beam group includes a pair of transverse beams arranged at relative intervals, and the longitudinal beam group includes a pair of longitudinal beams arranged at relative intervals; the suspension rod assembly includes a pad, a suspension screw and a suspension rod nut, and the pad is arranged on a pair of the transverse beams or a pair of the longitudinal beams, the suspension screw is passed through the pad and both ends extend out of the pad, the lower end of the suspension screw is hung on the upper end of the steel mesh frame, and the upper end of the suspension screw is screwed to the suspension rod nut on the upper end surface of the pad.

7. A bridge cap construction device according to claim 6, characterized in that: The steel mesh frame includes a bottom steel mesh, a top steel mesh and a vertical steel mesh. The bottom steel mesh and the top steel mesh are arranged in parallel and spaced apart from each other. The vertical steel mesh is enclosed between the bottom steel mesh and the top steel mesh, and its upper and lower ends are respectively connected to the edges of the bottom steel mesh and the top steel mesh; the lower end of the suspension rod assembly suspends the top steel mesh, and the lifting support assembly is vertically arranged between the bottom steel mesh and the top steel mesh.

8. A bridge cap construction device according to claim 7, characterized in that: The foundation steel formwork frame is formed by splicing and enclosing a number of foundation steel formworks.

9. A bridge cap construction device according to claim 8, characterized in that: A wire rope pulling machine is arranged on the peripheral ground of the foundation steel formwork, a support frame is arranged in the peripheral foundation pit of the foundation steel formwork, a guide wheel is arranged on the support frame, and the wire rope pulling machine is used to pull the wire rope through the guide wheel.

10. A bridge cap construction method, using a bridge cap construction device as claimed in any one of claims 1 to 9, characterized in that: The following steps are involved: Step 1: Excavate and shape the foundation pit, break out the pile foundation steel cage pile head in the foundation pit, adjust the leaked pier body steel bars into a trumpet shape, and pour concrete in the foundation pit to form a concrete foundation; Step 2: Tie the bottom steel mesh of the steel mesh frame on the concrete foundation, place a lifting support assembly on the bottom steel mesh, tie the top steel mesh of the steel mesh frame on the lifting support assembly, and tie the vertical steel mesh of the steel mesh frame between the bottom steel mesh and the top steel mesh; Step 3: splicing the cap steel formwork on the periphery of the steel mesh frame to form a cap steel formwork frame, and fixing the cap steel formwork frame by arraying nested sleeve assemblies on a pair of the cap steel formworks opposite to each other on both sides of the cap steel formwork frame; Step 4: sequentially erecting a transverse beam group and a longitudinal beam group on the cap steel formwork frame, installing sleeve assemblies on the transverse beam group and the longitudinal beam group to suspend and fix the top steel mesh of the steel mesh frame; Step 5: Adjust the height of the lifting support assembly to lower it and take it out of the steel mesh frame, and pour concrete in the cap steel formwork frame; Step 6: After the concrete solidifies, disassemble the sleeve assembly and the foundation steel formwork frame.

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