Bridge lower structure construction integral jacking working platform and construction method

Abstract

The invention relates to the technical field of bridge construction, in particular to a bridge lower structure construction integral jacking working platform and a construction method.The bridge lower structure construction integral jacking working platform comprises a top platform, two first unfolding plates which are symmetrical front and back are rotatably connected to the top platform, second unfolding plates are rotatably connected to the first unfolding plates, and the top platform is arranged on a lifting mechanism; and a propelling mechanism is arranged on the top platform. Through cooperative work of the lifting mechanism, the unfolding mechanism and the propelling mechanism, modularization and automatic operation of bridge lower structure construction are achieved, the lifting mechanism is driven by a lead screw and linked with a folding assembly, the height of the platform can be accurately controlled, it is ensured that the construction axis is consistent with design, and the construction efficiency is improved. And the unfolding mechanism realizes rapid unfolding and folding of the unfolding plate through a pull rope and a driving motor to form a stable positioning frame, so that the construction efficiency and the positioning precision are remarkably improved, and the time and errors of manual adjustment are reduced.

Description

Technical Field

[0001] The invention relates to the technical field of bridge construction, and in particular to an integral jacking work platform for bridge substructure construction and a construction method. Background Art

[0002] Bridge substructure construction is an important link in bridge construction. Traditional construction methods mostly use scaffolding or temporary support structures, which have problems such as low construction efficiency, great safety hazards, and poor positioning accuracy. Especially in the construction of high piers or multi-story structures, traditional methods require repeated erection and dismantling of scaffolding, which is not only time-consuming and labor-intensive, but also prone to construction errors due to human factors. In addition, traditional construction equipment lacks automation functions, and a large amount of manual intervention is required during the construction process, further increasing the difficulty and cost of construction.

[0003] In recent years, with the continuous development of bridge construction technology, jacking construction platforms have gradually been used in bridge substructure construction. However, existing jacking platforms mostly use a single hydraulic jacking system, lack the precise positioning and transportation functions of construction parts, and the load transfer mechanism is imperfect, which makes the equipment prone to fatigue damage during long-term use. In addition, the deployment and folding operations of existing platforms in multi-layer construction are complicated, which makes it difficult to meet the needs of efficient construction.

[0004] Therefore, in response to the above problems, a kind of overall jacking work platform and construction method for bridge substructure construction are now developed. Summary of the invention

[0005] In order to overcome the shortcomings of the prior art, the present invention provides an integral jacking work platform for bridge substructure construction and a construction method.

[0006] The technical implementation scheme of the present invention is: An integral jacking work platform for bridge substructure construction includes a top platform, on which two first unfolding plates are rotatably connected front and rear, and each of the first unfolding plates is rotatably connected to a second unfolding plate. The top platform is arranged on a lifting mechanism, and the lifting mechanism is used to adjust the height position of the top platform. A propulsion mechanism is arranged on the top platform, and the propulsion mechanism is used to assist construction pieces to enter the construction position.

[0007] More preferably, the lifting mechanism includes a base, and there are two bases in total, which are respectively arranged under the top platform, and a first driving motor is installed on the base, and a first screw rod is connected to the output shaft of the first driving motor, and the first screw rod is rotatably connected to the adjacent base, and a first sliding seat is slidably connected to the base, and the first sliding seat is threadedly connected to the adjacent first screw rod, and the lower sides of the front and rear parts of the top platform are also rotatably connected to the first screw rod, and the lower sides of the front and rear parts of the top platform are slidably connected to the second sliding seat, and the second sliding seat is threadedly connected to the adjacent first screw rod, and a folding component is rotatably connected between the second sliding seat and the corresponding first sliding seat.

[0008] More preferably, the propulsion mechanism includes a fixed column, four of the fixed columns are connected to the lower sides of the front and rear parts of the top platform, the fixed columns are slidably connected with a lifting frame, the lifting frame and the adjacent fixed columns are connected with a spring, the bottom of the outer fixed columns are rotatably connected with a rotating part, the rotating part and the adjacent fixed columns are connected with a torsion spring, the rotating part is rotatably connected with a contact roller, the bottoms of the two middle fixed columns are connected with a mounting frame, a dual-axis motor is installed on the mounting frame, and contact rollers are connected to the output shafts of the dual-axis motors.

[0009] More preferably, a supporting mechanism is also included, the supporting mechanism includes a first fixed seat, the lower sides of the left and right parts of the top platform are connected to the first fixed seat, a stabilizing member is connected between the first fixed seat and the top platform, a hydraulic cylinder is installed on the first fixed seat, the telescopic end of the hydraulic cylinder is connected to a supporting frame, the first fixed seat is connected to two guide limit sleeve rods, and the support frame is slidably connected to the adjacent guide limit sleeve rods.

[0010] More preferably, it also includes an unfolding mechanism, which includes a mounting seat, and two left-right symmetrical mounting seats are connected to the upper sides of the front and rear parts of the top platform, and a second drive motor is installed on the mounting seat, and a winding roller is connected to the output shaft of the second drive motor, and a pull rope is wound on the winding roller, and two second fixed seats are connected to the first unfolding plate, and the pull ropes are connected to adjacent second fixed seats.

[0011] More preferably, a protective mechanism is also included, which includes a first guardrail, two of the first guardrails are connected to the upper sides of the front, back, left and right parts of the top platform, and the corresponding first guardrails are rotatably connected to the second guardrails, and the second guardrails are slidably connected to the locking rods, and the locking rods can be clamped with adjacent first guardrails.

[0012] More preferably, an extension mechanism is also included, the extension mechanism includes an extension plate, the two limit rods are slidably connected to the support frame, the limit rods are connected with extension plates, the extension plates are used to increase the support contact area of ​​adjacent support frames, the extension plates are rotatably connected to second screw rods, the second screw rods are threadedly connected to adjacent support frames, and the outer ends of the second screw rods are provided with power-assisting screwdrivers.

[0013] More preferably, the bottom of each support frame has an anti-slip groove.

[0014] More preferably, the second guardrail and the adjacent first guardrail are both detachable connection structures.

[0015] A construction method for an integral jacking work platform for bridge substructure construction, the specific steps are as follows: Step 1: Pour the bottom foundation concrete in the construction area of ​​the bridge substructure to ensure that the foundation plane is flat and reaches the designed strength. Arrange the base of the device symmetrically on the foundation plane, adjust the base position to align it with the designed axis, start the first drive motor of the lifting mechanism, drive the first screw to rotate, drive the first sliding seat to slide along the base, and at the same time, the second sliding seat on the lower side of the top platform is linked through the folding component to adjust the top platform to the initial construction height; Step 2: Install the column formwork on the foundation platform to ensure that the formwork is positioned accurately. After the column is cast, start the second drive motor to drive the winding roller to wind up the pull rope, so that the first unfolding plate is unfolded outward around the hinge point of the top platform, and the second unfolding plate is unfolded twice along the hinge point of the first unfolding plate to form a positioning frame surrounding the column; Step 3: After the column is poured, start the first driving motor of the lifting mechanism to drive the first sliding seat to slide to the outside of the base. At the same time, the second sliding seat on the lower side of the top platform is extended through the folding assembly to lift the top platform to the second-floor construction elevation. Start the double-axis motor of the propulsion mechanism to drive the contact roller to rotate, and guide the prefabricated formwork or steel bar components along the fixed column to the construction position smoothly. The second-floor structure is assembled and poured in the space after lifting. The unfolded plate is used as a temporary working platform during the construction process. Step 4: After the second-layer structure is poured and reaches the designed strength, start the hydraulic cylinder of the support mechanism to drive the support frame to extend downward along the guide limit sleeve rod until the bottom of the support frame is in close contact with the top surface of the second-layer platform to complete the load transfer. After the support frame fully bears the load, the lifting mechanism enters the unloading state, and the first sliding seat and the second sliding seat are folded and contracted through the folding assembly to reduce the height of the top platform and reserve space for the next layer of lifting; Step 5: Start the lifting mechanism to lift the top platform to the third-layer construction elevation. Follow the methods of steps 3 and 4 to complete the construction of the third layer and subsequent layers in sequence until the construction of the bridge substructure is completed; Step 6: After the construction is completed, start the second drive motor to drive the winding roller to reel in the pull rope, so that the first unfolding plate and the second unfolding plate are retracted to the initial position in turn, the entire device is lowered to the base plane, the base and other components are removed, and the construction task is completed.

[0016] By adopting the above technical solution, the advantages of the present invention are: 1. The present invention realizes modular and automated operation of bridge substructure construction through the coordinated work of the lifting mechanism, the unfolding mechanism and the propulsion mechanism. The lifting mechanism adopts the linkage of the screw drive and the folding assembly, which can accurately control the platform height and ensure that the construction axis is consistent with the design. The unfolding mechanism realizes the rapid unfolding and folding of the unfolding plate through the pull rope and the drive motor to form a stable positioning frame, which significantly improves the construction efficiency and positioning accuracy and reduces the time and error of manual adjustment.

[0017] 2. The present invention uses the design of hydraulic cylinders and guide limit sleeves to achieve smooth load transfer after the construction of each floor is completed, avoiding fatigue loss caused by long-term load-bearing of the lifting mechanism. At the same time, the first guardrail and the second guardrail of the protective mechanism form a closed working environment, which not only improves construction safety, but also extends the service life of the equipment and reduces maintenance costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention.

[0019] Figure 2 It is a three-dimensional structural schematic diagram of the lifting mechanism of the present invention.

[0020] Figure 3 It is a partial cross-sectional three-dimensional structural schematic diagram of the lifting mechanism of the present invention.

[0021] Figure 4 It is a three-dimensional structural schematic diagram of the propulsion mechanism of the present invention.

[0022] Figure 5 It is a partial cross-sectional three-dimensional structural schematic diagram of the propulsion mechanism of the present invention.

[0023] Figure 6 It is a schematic diagram of the three-dimensional structure of the support mechanism of the present invention.

[0024] Figure 7 It is a partial three-dimensional structural schematic diagram of the support mechanism of the present invention.

[0025] Figure 8 It is a three-dimensional structural schematic diagram of the unfolding mechanism of the present invention.

[0026] Fig. 9 It is a three-dimensional structural schematic diagram of the protection mechanism of the present invention.

[0027] Fig.10 It is a partial cross-sectional three-dimensional structural schematic diagram of the extension mechanism of the present invention.

[0028] The markings of the components in the accompanying drawings are as follows: 1. top platform, 2. first unfolding plate, 3. second unfolding plate, 4. lifting mechanism, 41. base, 42. first drive motor, 43. folding assembly, 44. first sliding seat, 45. first screw rod, 46. second sliding seat, 5. propulsion mechanism, 51. fixed column, 52. lifting frame, 53. spring, 54. rotating part, 55. torsion spring, 56. contact roller, 57. mounting frame, 58. dual-axis electric Machine, 6, supporting mechanism, 61, first fixed seat, 62, stabilizing member, 63, hydraulic cylinder, 64, guide limit sleeve rod, 65, supporting frame, 7, unfolding mechanism, 71, mounting seat, 72, second driving motor, 73, winding roller, 74, pull rope, 75, second fixed seat, 8, protective mechanism, 81, first guardrail, 82, second guardrail, 83, locking rod, 9, extension mechanism, 91, extension plate, 92, limit rod, 93, second screw rod. DETAILED DESCRIPTION

[0029] The technical solutions in the embodiments of the present invention are described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention. Example

[0030] An integral jacking work platform for bridge substructure construction, such as Figure 1-Figure 10 As shown, it includes a top platform 1, on which two first unfolding plates 2 are rotatably connected front and back, and on which the first unfolding plates 2 are rotatably connected second unfolding plates 3, and the top platform 1 is arranged on a lifting mechanism 4, and the lifting mechanism 4 is used to adjust the height position of the top platform 1, and a propulsion mechanism 5 is arranged on the top platform 1, and the propulsion mechanism 5 is used to assist the construction parts to enter the construction position.

[0031] The lifting mechanism 4 includes a base 41. There are two bases 41, which are respectively arranged under the top platform 1. A first driving motor 42 is installed on each base 41. A first screw rod 45 is connected to the output shaft of the first driving motor 42. The first screw rod 45 is rotatably connected to the adjacent base 41. A first sliding seat 44 is slidably connected to the base 41. The first sliding seat 44 is threadedly connected to the adjacent first screw rod 45. The lower sides of the front and rear parts of the top platform 1 are also rotatably connected to the first screw rod 45. The lower sides of the front and rear parts of the top platform 1 are slidably connected to the second sliding seat 46. The second sliding seat 46 is threadedly connected to the adjacent first screw rod 45. A folding component 43 is rotatably connected between the second sliding seat 46 and the corresponding first sliding seat 44.

[0032] The propulsion mechanism 5 includes a fixed column 51, and four fixed columns 51 are connected to the lower sides of the front and rear parts of the top platform 1. The fixed columns 51 are slidably connected with a lifting frame 52, and a spring 53 is connected between the lifting frame 52 and the adjacent fixed columns 51. The bottom of the outer fixed columns 51 is rotatably connected with a rotating member 54, and a torsion spring 55 is connected between the rotating member 54 and the adjacent fixed columns 51. A contact roller 56 is rotatably connected to the rotating member 54, and a mounting frame 57 is connected between the bottoms of the two middle fixed columns 51, and a dual-axis motor 58 is installed on the mounting frame 57, and the contact roller 56 is connected to the output shaft of the dual-axis motor 58.

[0033] It should be noted that the bottom foundation concrete is poured first, and after the foundation is formed, the base 41 of the device is symmetrically arranged on the foundation plane, and the first drive motor 42 of the base 41 drives the first screw 45 to rotate, driving the first sliding seat 44 to slide along the base 41. At the same time, the second sliding seat 46 on the lower side of the top platform 1 is linked with the first sliding seat 44 through the folding component 43 to achieve preliminary adjustment and positioning of the overall height of the device. After the column template is installed on the basic platform, the column pouring is started. After the column is poured and formed, the unfolding mechanism 7 is operated to rotate and unfold the first unfolding plate 2 around the top platform 1, and the second unfolding plate 3 is unfolded again along the hinge point of the first unfolding plate 2 to form a positioning frame surrounding the column. At this time, the lifting mechanism 4 continuously fine-tunes the platform height to ensure that the positioning space formed by the first unfolding plate 2 and the second unfolding plate 3 are consistent with the design axis. The lines are precisely aligned, and then the first driving motor 42 drives the first screw rod 45 to rotate, so that the first sliding seat 44 slides to the outside of the base 41. At the same time, the second sliding seat 46 on the lower side of the top platform 1 is synchronously lifted by the extension of the folding component 43. At this time, the unfolding plate remains in the unfolded state as a temporary working platform. The height of the second-layer construction space formed after lifting is accurately controlled by the screw rod stroke. When the top platform 1 reaches the second-layer construction elevation, the propulsion mechanism 5 starts to work, and the lifting frame 52 automatically adjusts the height under the action of the spring 53. The rotating member 54 is reset by the torsion spring 55 to make the contact roller 56 form a conveying track. The dual-axis motor 58 drives the middle contact roller 56 to rotate actively, and cooperates with the outer driven contact roller 56 to form a transmission system, so that the prefabricated formwork or steel bar component is guided along the fixed column 51 and smoothly sent to the construction position to complete the assembly and pouring of the upper structure. Example

[0034] On the basis of Example 1, it also includes a support mechanism 6, which includes a first fixed seat 61, and the lower sides of the left and right parts of the top platform 1 are connected to the first fixed seat 61, and a stabilizing member 62 is connected between the first fixed seat 61 and the top platform 1, and a hydraulic cylinder 63 is installed on the first fixed seat 61, and a support frame 65 is connected to the telescopic end of the hydraulic cylinder 63, and the bottom of the support frame 65 has an anti-slip groove, and two guide limit sleeve rods 64 are connected to the first fixed seat 61, and the support frame 65 is slidably connected to the adjacent guide limit sleeve rods 64.

[0035] It should be noted that when the second-layer structure is poured and reaches the designed strength, the support mechanism 6 begins to perform load transfer and device retraction, and the hydraulic cylinder 63 is started to drive the support frame 65 to extend vertically downward along the guide limit sleeve rod 64 until the bottom of the support frame 65 is in close contact with the top surface of the second-layer solidified concrete platform. The guide limit sleeve rod 64 limits the horizontal deviation of the support frame 65 through sliding cooperation to ensure that the load transfer path is vertical; at the same time, the stabilizing member 62 between the first fixed seat 61 and the top platform 1 forms a triangular stable structure to prevent lateral deformation of the hydraulic cylinder 63 when it is under pressure. When the support frame 65 fully bears the dead weight of the device and the construction load, the lifting mechanism 4 enters the unloading state. : The first sliding seat 44 and the second sliding seat 46 are folded and contracted through the folding component 43, driving the relative height between the top platform 1 and the base 41 to decrease, reserving travel space for jacking. During this process, the hydraulic cylinder 63 continuously applies constant pressure to ensure that the support frame 65 always maintains contact with the second-layer platform to avoid structural impact caused by sudden load unloading. After the lifting mechanism 4 shrinks to the initial height, the hydraulic cylinder 63 reverses and slowly retracts the support frame 65 to make it separate from the surface of the second-layer platform. The top platform 1 is then re-lifted through the lifting mechanism 4, and the folding component 43 is extended to lift the platform to the third-layer construction elevation. At this time, the support mechanism 6 is reset and on standby, preparing for the next cycle of load transfer.

[0036] It also includes an unfolding mechanism 7, which includes a mounting seat 71. The upper sides of the front and rear parts of the top platform 1 are connected to two symmetrical mounting seats 71. A second driving motor 72 is installed on the mounting seat 71. The output shaft of the second driving motor 72 is connected to a winding roller 73. A pull rope 74 is wound around the winding roller 73. Two second fixed seats 75 are connected to the first unfolding plate 2, and the pull ropes 74 are connected to adjacent second fixed seats 75.

[0037] It should be noted that after the device completes the initial positioning, the second drive motor 72 starts, drives the winding roller 73 to rotate, and starts to wind up the pull rope 74. The pull rope 74 is connected to the first unfolding plate 2 through the second fixed seat 75. As the pull rope 74 is wound, the first unfolding plate 2 unfolds outward around the hinge point of the top platform 1 under the action of auxiliary external force. After the unfolding plate is fully unfolded, the second drive motor 72 stops running and the pull rope 74 remains in a tensioned state to ensure that the unfolding plate remains stable during construction.

[0038] It also includes a protection mechanism 8, which includes a first guardrail 81. Two of the first guardrails 81 are connected to the upper sides of the front, back, left and right parts of the top platform 1. The corresponding first guardrails 81 are rotatably connected to the second guardrails 82. The second guardrails 82 and the adjacent first guardrails 81 are both detachable connection structures. The second guardrails 82 are slidably connected to the locking rods 83, and the locking rods 83 can be clamped with the adjacent first guardrails 81.

[0039] It also includes an extension mechanism 9, which includes an extension plate 91. The two limit rods 92 are slidably connected to the support frame 65, and the extension plates 91 are connected between the limit rods 92. The extension plates 91 are used to increase the support contact area of ​​the adjacent support frames 65. The extension plates 91 are rotatably connected to the second screw rods 93, and the second screw rods 93 are threadedly connected to the adjacent support frames 65. The outer ends of the second screw rods 93 are provided with power-assisting screw handles.

[0040] A construction method for an integral jacking work platform for bridge substructure construction, the specific steps are as follows: Step 1: Pour the bottom foundation concrete in the construction area of ​​the bridge substructure to ensure that the foundation plane is flat and reaches the designed strength. Arrange the base 41 of the device symmetrically on the foundation plane, adjust the position of the base 41 to align it with the designed axis, start the first drive motor 42 of the lifting mechanism 4, drive the first screw rod 45 to rotate, drive the first sliding seat 44 to slide along the base 41, and at the same time, the second sliding seat 46 on the lower side of the top platform 1 is linked through the folding component 43 to adjust the top platform 1 to the initial construction height; Step 2: Install the column template on the basic platform to ensure that the template is positioned accurately. After the column is cast, start the second drive motor 72 to drive the winding roller 73 to wind up the pull rope 74, so that the first unfolding plate 2 is unfolded outward around the hinge point of the top platform 1, and the second unfolding plate 3 is unfolded again along the hinge point of the first unfolding plate 2 to form a positioning frame surrounding the column; Step 3: After the column is cast, the first driving motor 42 of the lifting mechanism 4 is started to drive the first sliding seat 44 to slide to the outside of the base 41. At the same time, the second sliding seat 46 on the lower side of the top platform 1 is extended through the folding assembly 43 to lift the top platform 1 to the second-floor construction elevation. The double-axis motor 58 of the propulsion mechanism 5 is started to drive the contact roller 56 to rotate, and the prefabricated formwork or steel bar component is guided along the fixed column 51 and smoothly sent to the construction position. The second-floor structure is assembled and cast in the space after the lifting. The unfolded plate is used as a temporary working platform during the construction process. Step 4: After the second-layer structure is poured and reaches the designed strength, the hydraulic cylinder 63 of the support mechanism 6 is started to drive the support frame 65 to extend downward along the guide limit sleeve rod 64 until the bottom of the support frame 65 is in close contact with the top surface of the second-layer platform to complete the load transfer. After the support frame 65 fully bears the load, the lifting mechanism 4 enters the unloading state, and the first sliding seat 44 and the second sliding seat 46 are folded and contracted through the folding assembly 43 to reduce the height of the top platform 1 and reserve space for the next layer of lifting; Step 5: Start the lifting mechanism 4 to lift the top platform 1 to the third-layer construction elevation, and complete the construction of the third layer and subsequent layers in sequence according to the methods of steps 3 and 4 until the construction of the bridge substructure is completed; Step 6: After the construction is completed, start the second drive motor 72 to drive the winding roller 73 to reel in the pull rope 74, so that the first unfolding plate 2 and the second unfolding plate 3 are retracted to the initial position in sequence, the entire device is lowered to the base plane, the base 41 and other components are removed, and the construction task is completed.

[0041] 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, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. An integral jacking work platform for bridge substructure construction, characterized in that: The invention comprises a top platform (1), two first unfolding plates (2) symmetrically arranged front and rear are rotatably connected to the top platform (1), and second unfolding plates (3) are rotatably connected to the first unfolding plates (2). The top platform (1) is arranged on a lifting mechanism (4), and the lifting mechanism (4) is used to adjust the height position of the top platform (1). A propulsion mechanism (5) is arranged on the top platform (1), and the propulsion mechanism (5) is used to assist construction parts to enter the construction position.

2. The integral jacking work platform for bridge substructure construction according to claim 1 is characterized in that: The lifting mechanism (4) comprises a base (41). There are two bases (41) respectively arranged below the top platform (1). A first drive motor (42) is mounted on each base (41). The output shaft of each first drive motor (42) is connected to a first screw rod (45). Each first screw rod (45) is rotatably connected to an adjacent base (41). Each base (41) is slidably connected to a first sliding seat (44). Each first sliding seat (44) is threadedly connected to an adjacent first screw rod (45). The lower sides of the front and rear parts of the top platform (1) are also rotatably connected to the first screw rod (45). The lower sides of the front and rear parts of the top platform (1) are slidably connected to a second sliding seat (46). Each second sliding seat (46) is threadedly connected to an adjacent first screw rod (45). A folding assembly (43) is rotatably connected between the second sliding seat (46) and the corresponding first sliding seat (44).

3. The integral jacking work platform for bridge substructure construction according to claim 2 is characterized in that: The propulsion mechanism (5) comprises a fixed column (51), four fixed columns (51) are connected to the lower sides of the front and rear parts of the top platform (1), the fixed columns (51) are slidably connected to a lifting frame (52), a spring (53) is connected between the lifting frame (52) and the adjacent fixed column (51), the bottom of the outer fixed column (51) is rotatably connected to a rotating member (54), a torsion spring (55) is connected between the rotating member (54) and the adjacent fixed column (51), the rotating member (54) is rotatably connected to a contact roller (56), the bottoms of the two middle fixed columns (51) are connected to a mounting frame (57), a double-axis motor (58) is installed on the mounting frame (57), and the output shaft of the double-axis motor (58) is connected to the contact roller (56).

4. The integral jacking work platform for bridge substructure construction according to claim 3 is characterized in that: The device also comprises a support mechanism (6), wherein the support mechanism (6) comprises a first fixed seat (61), the lower sides of the left and right parts of the top platform (1) are connected to the first fixed seat (61), a stabilizing member (62) is connected between the first fixed seat (61) and the top platform (1), a hydraulic cylinder (63) is installed on the first fixed seat (61), a support frame (65) is connected to the telescopic end of the hydraulic cylinder (63), two guide limit sleeve rods (64) are connected to the first fixed seat (61), and the support frame (65) is slidably connected to the adjacent guide limit sleeve rods (64).

5. The integral jacking work platform for bridge substructure construction according to claim 4 is characterized in that: The device also comprises an unfolding mechanism (7), wherein the unfolding mechanism (7) comprises a mounting seat (71), wherein the upper sides of the front and rear parts of the top platform (1) are connected to two mounting seats (71) which are symmetrical on the left and right sides, wherein a second driving motor (72) is mounted on each mounting seat (71), wherein a winding roller (73) is connected to the output shaft of each second driving motor (72), wherein a pull rope (74) is wound around each winding roller (73), wherein two second fixing seats (75) are connected to each first unfolding plate (2), and wherein each pull rope (74) is connected to an adjacent second fixing seat (75).

6. The integral jacking work platform for bridge substructure construction according to claim 5 is characterized in that: The device also comprises a protection mechanism (8), wherein the protection mechanism (8) comprises a first guardrail (81), two of the first guardrails (81) are connected to the upper sides of the front, rear, left and right parts of the top platform (1), the corresponding first guardrails (81) are rotatably connected to second guardrails (82), the second guardrails (82) are slidably connected to locking rods (83), and the locking rods (83) are capable of being engaged with adjacent first guardrails (81).

7. The integral jacking work platform for bridge substructure construction according to claim 6 is characterized in that: It also includes an extension mechanism (9), the extension mechanism (9) including an extension plate (91), the support frame (65) is slidably connected to two limit rods (92), the limit rods (92) are connected to the extension plate (91), the extension plate (91) is used to increase the support contact area of ​​adjacent support frames (65), the extension plate (91) is rotatably connected to a second screw rod (93), the second screw rod (93) is threadedly connected to the adjacent support frame (65), and the outer end of the second screw rod (93) is provided with an assist screw handle.

8. The integral jacking work platform for bridge substructure construction according to claim 4 is characterized in that: The bottom of the support frame (65) is provided with an anti-slip groove.

9. The integral jacking work platform for bridge substructure construction according to claim 6 is characterized in that: The second guardrail (82) and the adjacent first guardrail (81) are both detachable connection structures.

10. A construction method of an integral jacking work platform for bridge substructure construction, based on the integral jacking work platform for bridge substructure construction as claimed in any one of claims 1 to 8, characterized in that: The specific steps are as follows: Step 1: pouring bottom foundation concrete in the bridge substructure construction area to ensure that the foundation plane is flat and reaches the designed strength, symmetrically arranging the base (41) of the device on the foundation plane, adjusting the position of the base (41) so that it is aligned with the designed axis, starting the first drive motor (42) of the lifting mechanism (4), driving the first screw rod (45) to rotate, driving the first sliding seat (44) to slide along the base (41), and at the same time, the second sliding seat (46) on the lower side of the top platform (1) is linked through the folding assembly (43) to adjust the top platform (1) to the initial construction height; Step 2: Install the column template on the base platform to ensure that the template is positioned accurately. After the column is cast, start the second drive motor (72) to drive the winding roller (73) to wind up the pull rope (74), so that the first unfolding plate (2) unfolds outward around the hinge point of the top platform (1), and the second unfolding plate (3) unfolds again along the hinge point of the first unfolding plate (2) to form a positioning frame surrounding the column; Step 3: After the column casting is completed, the first driving motor (42) of the lifting mechanism (4) is started to drive the first sliding seat (44) to slide toward the outside of the base (41), and at the same time, the second sliding seat (46) on the lower side of the top platform (1) is extended through the folding assembly (43), and the top platform (1) is lifted to the second-floor construction elevation, and the double-axis motor (58) of the propulsion mechanism (5) is started to drive the contact roller (56) to rotate, and the prefabricated formwork or steel bar component is guided along the fixed column (51) and smoothly sent to the construction position, and the second-floor structure is assembled and cast in the space after the lifting, and the unfolded plate is used as a temporary working platform during the construction process; Step 4: After the second-layer structure is poured and reaches the designed strength, the hydraulic cylinder (63) of the support mechanism (6) is started to drive the support frame (65) to extend downward along the guide limit sleeve rod (64) until the bottom of the support frame (65) is in close contact with the top surface of the second-layer platform, completing the load transfer. After the support frame (65) fully bears the load, the lifting mechanism (4) enters the unloading state, and the first sliding seat (44) and the second sliding seat (46) are folded and contracted through the folding assembly (43), thereby lowering the height of the top platform (1) and reserving space for the next layer of lifting; Step 5: Start the lifting mechanism (4) to lift the top platform (1) to the third-layer construction elevation, and complete the construction of the third layer and subsequent layers in sequence according to the methods of steps 3 and 4 until the construction of the bridge substructure is completed; Step 6: After the construction is completed, the second drive motor (72) is started to drive the winding roller (73) to wind up the pull rope (74), so that the first unfolding plate (2) and the second unfolding plate (3) are successively retracted to the initial position, the device is lowered as a whole to the base plane, the base (41) and other components are removed, and the construction task is completed.

Images