Bridge erection machine leg support device

Abstract

Disclosed in the present invention is a bridge erection machine leg support device, comprising: a base assembly, comprising a base detachably arranged at the bottom of a front leg, a plurality of lifting drivers arranged side by side in the base, and a plurality of bottom plate supports connected side by side to movement ends of the plurality of lifting drivers; a lock sleeve assembly, comprising a pair of lock rods in an L shape, upper ends of the lock rods being coaxially hinged to two sides of the front leg, and a first lock frame being transversely provided at a lower end of each lock rod, a pair of first tensioning drivers oppositely arranged on the first lock frames, second lock frames being provided at telescopic movement ends of the pair of first tensioning drivers correspondingly, and a pair of second tensioning drivers arranged on the pair of second lock frames, respectively, third lock frames being provided at the telescopic movement ends of the pair of second tensioning drivers, respectively; and a plurality of abutting units, comprising mechanical arms rotationally arranged, abutting drivers arranged on the mechanical arms, and abutting plates. The present invention has the beneficial effect of preventing unstable supporting and displacement of the front leg of a bridge erection machine when a large-span bridge or a slope bridge is laid.

Description

Bridge girder erection machine outrigger support device TECHNICAL FIELD

[0001] The present application relates to the field of bridge girder erection equipment. More particularly, the present application relates to a bridge girder erection machine outrigger support device. BACKGROUND

[0002] In the process of longitudinal movement of the main machine of the bridge girder erection machine through the hole or the process of moving a section of the bridge, the front outrigger needs to be supported on the pier and needs to bear a large load. The stress is complex, especially in the process of large-span and slope bridge erection, which is more difficult and more prone to overturning accidents. The reasons are as follows: impact horizontal force caused by different steps of the longitudinal movement of the bridge girder erection machine; impact on the front outrigger caused by the forward movement of the center of gravity of the main machine of the bridge girder erection machine near the front outrigger and the large forward suspension of the main beam of the bridge girder erection machine; and vibration caused by the front and rear shaking of the front outrigger due to the high front outrigger caused by the slope operation, thereby causing the overturning of the bridge girder erection machine due to the instability of the front outrigger. Therefore, the inventor proposes to set a support device to solve the above technical problems.

[0003] SUMMARY

[0004] An object of the present application is to solve at least the above problems and to provide at least the advantages to be described later.

[0005] In order to achieve these objects and other advantages according to the present application, a bridge girder erection machine outrigger support device is provided, comprising:

[0006] a base assembly, comprising:

[0007] a base, which is detachably arranged at the bottom of the front outrigger of the bridge girder erection machine, and the bottom of the base is open;

[0008] a plurality of lifting drives, which are arranged side by side in the base, and the moving end of the lifting drive is arranged downward;

[0009] a plurality of bottom plate supports, which are arranged side by side and respectively connected to the moving end of the plurality of lifting drives;

[0010] a lock sleeve assembly, comprising:

[0011] a pair of lock rods, which are in the shape of L, and the upper ends of the pair of lock rods are coaxially hinged to the two sides of the front outrigger, and the lower ends of the pair of lock rods are transversely provided with a first lock frame;

[0012] a pair of first tension drives, which are oppositely arranged on the first lock frame, and a second lock frame is respectively arranged on the telescopic moving end of the pair of first tension drives;

[0013] A pair of second tensioning drivers are arranged on a pair of second lock frames, and a third lock frame is arranged on the extension and retraction end of the second tensioning drivers;

[0014] A plurality of pressing units are arranged on the first lock frame, the second lock frame and the third lock frame, and the pressing unit comprises a mechanical arm, a pressing driver arranged on the mechanical arm, and a pressing plate arranged on the moving end of the pressing driver.

[0015] Preferably, a first partition is arranged in the base, the lower end of the front leg extends into the base and is located on the first partition, a plurality of threaded holes are arranged on the side wall of the base, corresponding threaded holes are arranged on the side wall of the front leg, and the base and the front leg are fixed by screwing, nut and threaded hole.

[0016] Preferably, a second partition is arranged below the first partition in the base, and the lifting driver is arranged on the second partition.

[0017] The base support comprises:

[0018] A strip-shaped steel plate is fixed on the moving end of the lifting driver, and a plurality of first limiting holes are arranged on the steel plate.

[0019] A sleeper is arranged below the steel plate, a plurality of second limiting holes with small upper diameter and large lower diameter are arranged on the sleeper, and the lower end of the sleeper is lower than the lower end of the base.

[0020] A plurality of connecting rods are movably arranged in one first limiting hole and one second limiting hole, and limiting nuts are screwed on both ends of the connecting rod, wherein the diameter of the connecting rod is smaller than the diameter of the first limiting hole and the second limiting hole, the outer diameter of the limiting nut is larger than the diameter of the smaller part of the second limiting hole and smaller than the diameter of the larger part of the second limiting hole, and the thickness of the limiting nut is smaller than the axial length of the larger part of the second limiting hole.

[0021] Preferably, a pair of limiting clamping plates are arranged on the side wall of the lower end of the base along the longitudinal direction of the bridge girder, a plurality of threaded holes are arranged on the limiting clamping plate, a pair of adjusting plates are arranged parallel to the pair of limiting clamping plates, a plurality of positioning counterbores are arranged on one side of the adjusting plate facing the limiting clamping plate, and the positioning counterbores and the threaded holes on the limiting clamping plate are connected by bolts and nuts, wherein the pair of adjusting plates abut on the side walls of the two sleepers located on the edge, and the lower end of the adjusting plate is higher than the lower surface of the sleeper.

[0022] Preferably, the lifting driver, the first tensioning driver and the second tensioning driver are jacks or ball screws.

[0023] Preferably, the bent part of the locking rod is arc-shaped, and the angle of the arc is 45-90°.

[0024] Preferably, the first locking frame and the second locking frame are arranged in two layers, and the third locking frame is arranged in one layer, and the first tensioning driver and the second tensioning driver are arranged on the upper layer of the first locking frame and the second locking frame respectively, and the pressing units are arranged on the lower layer of the first locking frame and the second locking frame.

[0025] Preferably, the mechanical arm and the steel plate are both provided with pressure sensors, and the mechanical arm is provided with an angle sensor.

[0026] Preferably, the pressing surface of the pressing plate is coated with an anti-skid layer.

[0027] Preferably, the outer wall of the base is provided with a ring-shaped flange at the upper end, and a plurality of levels are arranged on the flange at intervals.

[0028] The present application at least has the following advantages:

[0029] Firstly, by arranging the base assembly, when in use, the bottom plate is in contact with the pier, the lifting height of the moving end of each lifting driver is adjusted, and finally the front supporting leg on the upper part of the base is adjusted to a horizontal supporting state, so that the bridge erecting machine is stably supported. Compared with the traditional method of manually building a sleeper support on the pier, the supporting mode of the base assembly can significantly improve the supporting stability and supporting efficiency.

[0030] Secondly, by arranging the locking sleeve assembly, when in use, the first locking frame, the second locking frame and the third locking frame are pulled around the pier in a circumferential direction, and then the pressing drivers of each pressing unit are fine-tuned to balance the stress of each pressing plate, so as to stably connect with the pier by tension, further improve the supporting stability of the front supporting leg, avoid the failure of supporting due to large shaking, significantly avoid the occurrence of tilting accidents, and the whole process does not need to reserve holes or pre-set corbels on the pier, and the fixing and adjustment efficiency is also very high.

[0031] Other advantages, objects and features of the present application will be apparent from the following description, and will be understood by those skilled in the art through the study and practice of the present application. BRIEF DESCRIPTION OF DRAWINGS

[0032] Fig. 1 is a side view of the supporting device according to one of the technical solutions of the present application;

[0033] Fig. 2 is a top view of the locking sleeve assembly according to one of the technical solutions of the present application;

[0034] Figure 3 is a bottom view of the lock sleeve assembly of one of the technical solutions of the present application;

[0035] Figure 4 is a detailed view of the bottom plate support of one of the technical solutions of the present application;

[0036] Figure 5 is a detailed view of the limiting clamping plate of one of the technical solutions of the present application;

[0037] Figure 6 is a top view of the level of one of the technical solutions of the present application;

[0038] Figure 7 is a detailed view of the adjusting plate of one of the technical solutions of the present application. DETAILED DESCRIPTION

[0039] The present application will be further described below in conjunction with the drawings, so that those skilled in the art can implement the present application according to the description and drawings.

[0040] It should be noted that the experimental methods in the following embodiments are all conventional methods unless otherwise specified, and the reagents and materials can be obtained from commercial channels unless otherwise specified; in the description of the present application, the terms indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0041] As shown in Figures 1-7, the present application is explained as follows: base 100, first partition 11, second partition 12, limiting clamping plate 13, adjusting plate 14, positioning counterbore 15, convex plate 16, level 17, lifting drive 200, bottom plate support 300, steel plate 31, first limiting hole 32, tie 33, second limiting hole 34, connecting rod 35, limiting nut 36, lock sleeve assembly 400, lock rod 41, first lock bracket 42, first tensioning drive 43, second lock bracket 44, second tensioning drive 45, third lock bracket 46, pressing unit 47, mechanical arm 401, pressing drive 402, pressing plate 403, anti-slip layer 404, pier 500, front leg 600.

[0042] As shown in Figures 1-7, the present application provides a bridge erecting machine leg support device, comprising:

[0043] The base assembly comprises:

[0044] The base 100 is detachably arranged at the bottom of the front leg 600 of the bridge erecting machine, and the bottom of the base 100 is open; specifically, the shape of the base 100 is arranged to be similar to the bottom of the front leg 600, such as a rectangular parallelepiped or a cylinder.

[0045] A plurality of lifting drives 200 are arranged side by side in the base 100, and the moving end of the lifting drive 200 is arranged downward; specifically, the lifting drive 200 can be selected from a jack or a ball screw, which has the advantages of stable driving moving direction, precise control of moving stroke, and large driving force.

[0046] A plurality of bottom plate supports 300 are arranged side by side and correspondingly connected to the moving end of the plurality of lifting drives 200; when the front support leg 600 is in a supporting state, the bottom plate support 300 is used to directly support on the top of the pier 500, and the area of the bottom plate support 300 is greater than the area of the base 100, which has the effect of increasing the stress area and improving the support stability. In use, after the bottom plate support 300 contacts the pier 500, the lifting height of the moving end of each lifting drive 200 is adjusted, and finally the front support leg 600 on the upper part of the base 100 is adjusted to a horizontal supporting state, so that the bridge erecting machine is stably supported. Compared with the traditional method of manually building a sleeper 33 on the pier 500 to support, the support mode of the base assembly can significantly improve the support efficiency.

[0047] A lock sleeve assembly 400 includes:

[0048] A pair of lock rods 41 are arranged in an L shape, and the upper end of the pair of lock rods 41 is coaxially hinged to the two sides of the front support leg 600, and the lower end of the pair of lock rods 41 is transversely provided with a first lock frame 42; specifically, the hinge shaft of the lock rod 41 is arranged along the transverse direction of the bridge erecting machine, the drive for driving the lock rod 41 to rotate is an electric motor and a speed reducer, the output shaft of the electric motor drives the speed reducer to rotate, and the output shaft of the speed reducer is coaxially fixed with the lock rod 41 through a shaft sleeve, so that the pair of lock rods 41 can be slowly rotated to the required position, and the shaking is reduced. When the base assembly is adjusted, the first lock frame 42 slowly moves under the driving of the lock rod 41, and finally locates on the front side wall of the pier 500;

[0049] A pair of first tensioning drives 43 are arranged opposite to each other on the first lock frame 42, and a second lock frame 44 is arranged on the telescopic moving end of each first tensioning drive 43; when the base assembly is adjusted, the first tensioning drive 43 is started, so that the second lock frame 44 moves towards each other, and finally locates on the side wall on both sides of the pier 500; specifically, the first tensioning drive 43 can be selected from a jack or a ball screw.

[0050] A pair of second tensioning drives 45 are arranged on the pair of second lock frames 44 respectively, and a third lock frame 46 is arranged on the telescopic moving end of each second tensioning drive 45; wherein the first lock frame 42, the second lock frame 44 and the third lock frame 46 are in the state of a rectangle with a notch; when the second lock frame 44 is subjected to a depending force, the second tensioning drive 45 is started to move the third lock frame 46 towards the first lock frame 42, and finally located on the front side wall of the pier; specifically, the second tensioning drive 45 can be selected from a jack or a ball screw.

[0051] A plurality of pressing units 47 are rotationally arranged on the first lock frame 42, the second lock frame 44 and the third lock frame 46, and the pressing unit 47 comprises a rotationally arranged mechanical arm 401, a pressing drive 402 arranged on the mechanical arm 401, and a pressing plate 403 arranged on the moving end of the pressing drive 402, wherein the pressing plate 403 is towards the center of the rectangle. The first lock frame 42, the second lock frame 44 and the third lock frame 46 are in a stress tensioning relationship with the pier 500 through the pressing unit 47. The side wall of the pier 500 is usually not in the same vertical state, and the inclination angle of the side wall cannot be guaranteed to be completely consistent. Therefore, the pressing unit 47 is connected to the first lock frame 42, the second lock frame 44 and the third lock frame 46 in a rotational manner, so as to match the side wall state of different piers 500, make the pressing plate 403 best fit the side wall of the pier 500 in the stress state, and then adjust the first tensioning drive 43 and the second tensioning drive 45 to make the first lock frame 42, the second lock frame 44 and the third lock frame 46 be tensioned around the pier 500, and then fine-tune the pressing drive 402 of each pressing unit 47 to make the pressing plate 403 balanced, so as to stably connect with the pier 500, further improve the support stability of the front support leg 600, and avoid the support from being invalid due to large shaking.

[0052] In the above technical solution, before the through hole, the front support leg 600 (the support device is installed on the front support leg 600) is moved forward to the next pier 500 at a preset safe speed, the front support leg 600 is slowly lowered until the bottom plate support 300 is supported on the pier 500, then the lock rod 41 is rotated, the lock sleeve assembly 400 surrounds the outer periphery of the pier 500, and the first lock frame 42 is naturally leaned on the front side wall of the pier 500 through the pressing unit 47; then the lifting drive 200 is adjusted, the base 100 supports the front support leg 600 to be horizontal; then the first tensioning drive 43 is started again, the second lock frame 44 moves towards, and the plurality of (generally two pressing units 47 are arranged on one second lock frame 44) pressing plates 403 abut on the side walls on both sides of the pier 500; the second tensioning drive 45 is started again, the third lock frame 46 moves towards the pier 500, and the plurality of (generally one pressing unit 47 is arranged on one third lock frame 46) pressing plates 403 are finally located on the front side wall of the pier, and form a pull with the pressing plates 403 on the first lock frame 42; then the pressing drive 402 of each pressing unit 47 is fine adjusted to balance the stress of each pressing plate 403, so that the pier 500 is stably connected in tension, and the anti-shaking fixing of the front support leg 600 is formed, so that the support is not invalid due to large shaking. Especially when large-span or slope bridge erection is faced, in the process of beam movement, the shaking amplitude is easy to be too large to cause imbalance and safety accidents, and the lock sleeve assembly 400 of the application can significantly avoid the above situation, and the whole process does not need to reserve holes or preset corbels on the pier 500, and the fixing and adjustment efficiency is also very high.

[0053] In another technical solution, the first partition plate 11 is arranged in the base 100, the lower end of the front support leg 600 extends into the base 100 and is located on the first partition plate 11, a plurality of threaded holes are arranged on the side wall of the base 100, corresponding threaded holes are arranged on the side wall of the front support leg 600, and the base 100 and the front support leg 600 are fixedly connected through bolts, nuts and the threaded holes.

[0054] In the above technical solution, a mounting and connecting mode of the front support leg 600 and the base 100 is provided, the first partition plate 11 and the threaded holes are arranged, the connection and fixing mode of the bolts and the nuts is adopted, and the fixing is reliable. In order to improve the supporting capacity of the first partition plate 11, a plurality of supporting ribs can be arranged between the bottom of the first partition plate 11 and the inner side wall of the base 100.

[0055] In another technical solution, the second partition plate 12 is arranged below the first partition plate 11 in the base 100, and the lifting drive 200 is arranged on the second partition plate 12; corresponding through holes are arranged on the second partition plate 12, so that the moving end of the lifting drive 200 extends downward;

[0056] The bottom plate support 300 comprises:

[0057] A plurality of steel plates 31 are fixed to the moving end of the lifting driver 200, and a plurality of first limiting holes 32 are formed in the steel plates 31; the shape of the steel plate 31 is set as a long rectangle similar to the cross section of the sleeper 33, but the width is slightly smaller than that of the sleeper 33; the length direction of the plurality of steel plates 31 is parallel to the lateral direction of the bridge erecting machine;

[0058] A plurality of sleepers 33 are arranged below the steel plates 31, and a plurality of second limiting holes 34 with gradually increasing diameters from top to bottom are formed in the sleepers 33; the lower end of the sleeper 33 is lower than the lower end of the base 100; the sleeper 33 protrudes from the bottom of the base 100, so that the base 100 is not directly in contact with the pier 500.

[0059] A plurality of connecting rods 35 are movably arranged in one first limiting hole 32 and one second limiting hole 34, respectively; the two ends of the connecting rod 35 are respectively screwed with limiting nuts 36; the diameter of the connecting rod 35 is smaller than the diameters of the first limiting hole 32 and the second limiting hole 34; the outer diameter of the limiting nut 36 is greater than the diameter of the smaller part of the second limiting hole 34 and smaller than the diameter of the larger part of the second limiting hole 34; the thickness of the limiting nut 36 is smaller than the axial length of the larger part of the second limiting hole 34. Under the limiting action of the limiting nuts 36 at the two ends, the connecting rod 35 can move up and down and translate a certain distance in the space limited by the first limiting hole 32 and the second limiting hole 34, so as to adapt to the pier top of the pier 500 with different roughnesses; after the front supporting leg 600 falls, the sleeper 33 can be self-adapted to the surface of the pier, and then the lifting driver 200 is started, so that the top of the base 100 is in a horizontal state, thereby the front supporting leg 600 is horizontally supported, and the supporting stability of the front supporting leg 600 is improved.

[0060] In another technical solution, a pair of limiting clamping plates 13 are arranged on the side wall of the lower end of the base 100 and are opposite to each other along the longitudinal direction of the bridge erecting machine; a plurality of threaded holes are formed in the limiting clamping plate 13; a pair of adjusting plates 14 are arranged parallel to the pair of limiting clamping plates 13; a plurality of positioning counterbores are formed in the side of the adjusting plate 14 facing the limiting clamping plate 13; the positioning counterbores and the threaded holes in the limiting clamping plate 13 are connected by bolts and nuts; the two adjusting plates 14 are opposite to each other and abut against the side walls of the two sleepers 33 located at the edges; the lower end of the adjusting plate 14 is higher than the lower surface of the sleeper 33.

[0061] In the above technical solution, in order to make the sleepers 33 abut against each other, reduce the gap, and avoid the sleepers 33 from sliding under the action of a large bearing force, the adjusting plate 14 and the limiting clamping plate 13 are arranged to be clamped on the side walls of the two outermost sleepers 33, so that the plurality of sleepers 33 are connected to each other and form an integral support.

[0062] In another technical solution, the bent part of the locking rod 41 is in the shape of a circular arc, and the angle of the arc is 45-90°. The acute angle support increases the downward supporting component force, thereby improving the support stability.

[0063] In another technical solution, the first locking frame 42 and the second locking frame 44 are arranged in two layers, and the third locking frame 46 is arranged in one layer. The first tensioning driver 43 and the second tensioning driver 45 are arranged on the upper layer of the first locking frame 42 and the second locking frame 44 respectively, and the pressing unit 47 is arranged on the lower layer of the first locking frame 42 and the second locking frame 44. The required area of the first locking frame 42 and the second locking frame 44 is reduced, thereby reducing the horizontal area occupied by the entire lock sleeve assembly 400, which is conducive to adapting to narrower bridge space operation and does not affect the installation of the first tensioning driver 43, the second tensioning driver 45 and the pressing unit 47.

[0064] In another technical solution, the mechanical arm 401 and the steel plate 31 are each provided with a pressure sensor, and the mechanical arm 401 is provided with an angle sensor. The angle sensor is used to assist in controlling the lifting stroke of each lifting driver 200, and the pressure sensor is used to control the pressure borne by each sleeper 33 within a preset stress threshold range, thereby significantly improving the balance. Similarly, the pressure sensor is used to assist in controlling the moving stroke of the first tensioning driver 43, the second tensioning driver 45 and each pressing driver 402, and the pressure sensor is used to control the pressure borne by each pressing plate 403 within a preset stress threshold range, thereby significantly improving the balance. The angle sensor is used to feedback the current rotation angle of each pressing plate 403.

[0065] In another technical solution, the pressing surface of the pressing plate 403 is provided with an anti-skid layer 404. The anti-skid layer 404 can improve the friction between the pressing plate 403 and the side wall of the pier 500, thereby improving the locking stability of the front leg 600.

[0066] In another technical solution, the outer side wall of the base 100 is provided with a ring-shaped convex plate 16 at the upper end, and a plurality of levels 17 are arranged on the convex plate 16 in a spaced manner. The levels 17 are used to assist in controlling whether the adjustment of the base 100 reaches a horizontal state.

[0067] Although the embodiments of the present application have been disclosed as above, they are not limited to the application and implementation listed in the specification and the embodiments, and can be fully applied to various fields suitable for the present application. For those skilled in the art, other modifications can be easily realized, and therefore the present application is not limited to specific details and the figures shown and described herein, without departing from the general concept defined by the claims and the equivalent scope.

Claims

1. The bridge erection machine leg support device is characterized by: include: A base assembly comprising: A base, which is detachably arranged at the bottom of the front legs of the bridge erecting machine, and the bottom of the base is open; A plurality of lifting drives are arranged side by side in the base, with the moving ends of the lifting drives arranged downward; A plurality of bottom plate supports are arranged side by side and are respectively connected to the moving ends of the plurality of lifting drives; A locking sleeve assembly comprising: A pair of locking rods, each of the pair of locking rods is L-shaped, the upper ends of the pair of locking rods are coaxially hinged to both sides of the front support legs, and the lower ends of the pair of locking rods are laterally provided with a first locking frame; A pair of first tensioning actuators, the pair of first tensioning actuators are relatively arranged on the first locking frame, and a second locking frame is respectively arranged on the telescopic moving ends of the pair of first tensioning actuators; A pair of second tensioning actuators, each of the pair of second tensioning actuators being disposed on a pair of second locking frames, and each of the telescopic movable ends of the pair of second tensioning actuators being provided with a third locking frame; wherein the first locking frame, the second locking frame, and the third locking frame are in a rectangular shape with a notch; Multiple pressure units are rotatably arranged on the first lock frame, the second lock frame, and the third lock frame. The pressure units include a rotatably arranged mechanical arm, a pressure driver arranged on the mechanical arm, and a pressure plate arranged on the movable end of the pressure driver, and the pressure plate faces the center of the rectangle.

2. The bridge erection machine leg support device according to claim 1, characterized in that: A first partition is provided in the base, and the lower end of the front support leg extends into the base and is located on the first partition. A plurality of threaded holes are provided on the side wall of the base, and corresponding threaded holes are provided on the side wall of the front support leg. The base and the front support leg are fixed by corresponding threaded connections through bolts, nuts and threaded holes.

3. The bridge erection machine leg support device according to claim 2, characterized in that: A second partition is provided in the base below the first partition, and the lifting drive is provided on the second partition; The bottom plate support comprises: A strip-shaped steel plate is fixed on the moving end of the lifting drive, and the steel plate is provided with a plurality of first limit hole; A sleeper is located below the steel plate, and a plurality of second limiting holes with smaller holes at the top and larger holes at the bottom are formed on the sleeper, and the lower end of the sleeper is lower than the lower end of the base; Multiple connecting rods, one connecting rod is movably arranged on a first limiting hole and a second limiting hole, and limiting nuts are respectively screwed on both ends of the connecting rod, wherein the diameter of the connecting rod is smaller than the diameter of the first limiting hole and the second limiting hole, the outer diameter of the limiting nut is larger than the diameter of the smaller diameter part of the second limiting hole and smaller than the diameter of the larger diameter part, and the thickness of the limiting nut is smaller than the axial length of the larger diameter part of the second limiting hole.

4. The bridge erection machine leg support device according to claim 3, characterized in that: A pair of limiting clamps are provided on the side walls of the lower end of the base along the longitudinal direction of the bridge-building machine, and a plurality of threaded holes are provided on the limiting clamps. A pair of adjustment plates are provided parallel to the pair of limiting clamps, and a plurality of positioning countersunk holes are provided on the side of the adjustment plate facing the limiting clamps. The positioning countersunk holes and the threaded holes on the limiting clamps are connected correspondingly by bolts and nuts, wherein a pair of adjustment plates are relatively abutted against the side walls of two sleepers located on the edge, and the lower ends of the adjustment plates are higher than the lower surfaces of the sleepers.

5. The bridge erection machine leg support device according to claim 1, characterized in that: The lifting drive, the first tensioning drive and the second tensioning drive are all jacks or ball screws.

6. The bridge erection machine leg support device according to claim 1, characterized in that: The locking rod is bent at a position that is quasi-arc-shaped, and the angle of the arc is 45-90 degrees.

7. The bridge erection machine leg support device according to claim 1, characterized in that: The first locking frame and the second locking frame are arranged in two layers, the third locking frame is arranged in one layer, the first tensioning drive and the second tensioning drive are arranged in the upper layers of the first locking frame and the second locking frame respectively, and the pressing unit is arranged in the lower layer of the first locking frame and the second locking frame.

8. The bridge erection machine leg support device according to claim 3, characterized in that: The mechanical arm and the steel plate are both provided with pressure sensors, and the mechanical arm is provided with an angle sensor.

9. The bridge erection machine leg support device according to claim 1, characterized in that: The pressing surface of the pressing plate is provided with an anti-slip layer.

10. The bridge erection machine leg support device according to claim 1, characterized in that: An annular convex plate is provided at the upper end of the outer side wall of the base, and a plurality of spirit levels are provided at intervals on the convex plate.

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