Beam body underpinning device based on incremental launching bridge large cantilever working condition and construction method of beam body underpinning device

Abstract

The invention discloses a beam body underpinning device based on the working condition of a large cantilever of a pushing bridge and a construction method of the beam body underpinning device, and relates to the technical field of bridge construction. The beam body underpinning device based on the working condition of the pushing bridge large cantilever comprises a supporting frame, a main hydraulic jacking assembly is fixedly connected to the top of the supporting frame, an auxiliary positioning assembly is fixedly connected to the top of the main hydraulic jacking assembly, and a moving assembly is arranged at the bottom of the supporting frame; the auxiliary positioning assembly comprises a jacking platform. According to the beam body underpinning device based on the pushing bridge large cantilever working condition and the construction method thereof, the jacking assembly pushes the supporting rollers to make contact with the bottom of a bridge firstly, the indicating plate is observed in the identification frame, the position of a main supporting position relative to the supporting frame can be obtained, and the moving direction needed by the fixing frame can be rapidly determined conveniently; therefore, the main supporting position can be quickly determined, and the construction speed of the bridge can be increased conveniently.

Description

Technical Field

[0001] The present invention relates to the technical field of bridge construction, and in particular to a beam underpinning device under a large cantilever working condition of a jacking bridge and a construction method thereof. Background Art

[0002] The large cantilever condition of a jacking bridge refers to a critical stress state during jacking construction when the length of the main girder segment after the pier has been pushed out is much longer than the length of the rear support, causing the front end of the main girder and the guide beam to reach the maximum cantilevered distance. At this time, the entire structural system acts like a giant cantilever beam, and its cantilever root (usually located at the support point of the rearmost pier where the beam has been dropped) is subjected to huge bending moments and shear forces.

[0003] The patent cited in China with application number 201711009065.2 discloses a gas-liquid bag type support frame for road construction and bridges. Its structure includes side reinforcement rods, a first support column, reinforcement ribs, connecting rods, a lifting staircase, a standing board, a support footrest, a second support column, a gas-liquid bag, a third support column, a sensor, a pedal, a mounting bracket, and a fourth support column. The sensor is equipped with an alarm light, an electrical housing, a contact wire, and a buzzer. The electrical housing is tightly attached to the middle section of the outer surface of the lifting staircase, and the alarm light is glued to the lower surface of the electrical housing.

[0004] The existing temporary structure for the replacement of jack-up bridges requires advance calculation and then support at the calculated position. However, there are many errors in reality, resulting in the support position not being at the best support position. More precise calculations and adjustments are needed, which will slow down the construction speed. Summary of the Invention

[0005] In view of the deficiencies in the prior art, the present invention provides a beam underpinning device and a construction method thereof based on a large cantilever working condition of a jacking bridge, so as to solve the problems raised in the above background technology.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solutions: a beam replacement device based on a large cantilever working condition of a jacking bridge, comprising a support frame, a main hydraulic jacking assembly is fixedly connected to the top of the support frame, an auxiliary positioning assembly is fixedly connected to the top of the main hydraulic jacking assembly, and a moving assembly is provided at the bottom of the support frame;

[0007] The auxiliary positioning component includes:

[0008] A jacking platform, the jacking platform is fixedly connected to the top of the main hydraulic jacking assembly;

[0009] A fixing frame, wherein two fixing frames are provided and both fixing frames are movably connected to the top of the jacking platform;

[0010] A supporting roller is movably connected to the top of the fixing frame.

[0011] Preferably, a spring is fixedly connected to the bottom of the fixing frame, and the bottom of the spring is fixedly connected to the jacking platform. One of the fixing frames is movably connected to the second connecting plate on the front side, and the other fixing frame is movably connected to the first connecting plate on the front side, and the first connecting plate is movably connected to the second connecting plate.

[0012] Preferably, an indicator plate is fixedly connected to the bottom of the second connecting plate, an identification frame is fixedly connected to the front of the support frame, and the indicator plate is arranged inside the identification frame.

[0013] Preferably, the top of the jacking platform is fixedly connected to a secondary hydraulic jacking assembly, and the top of the secondary hydraulic jacking assembly is movably connected to a movable support platform.

[0014] Preferably, the moving component includes a moving platform, the moving platform is movably connected to the bottom of the support frame, the bottom of the support frame is movably connected to several sliding wheels, the inside of the moving platform is movably connected to a threaded rod, the threaded rod is movably connected inside the moving platform, the right side of the moving platform is fixedly connected to a driving component, and the driving component is transmission-connected to the threaded rod, the bottom of the moving platform is fixedly connected to a moving wheel, and the left side of the moving platform is fixedly connected to a drag ring.

[0015] Preferably, a fixing plate is fixedly connected to the outer wall of the support frame, a first electric telescopic rod is fixedly connected to the bottom of the fixing plate, and a fixing head is fixedly connected to the bottom of the first electric telescopic rod.

[0016] Preferably, the left and right sides of the mobile platform are both fixedly connected with a second electric telescopic rod, and the bottom of the second electric telescopic rod is fixedly connected with a fixed head.

[0017] A construction method for a beam underpinning device under the large cantilever working condition of a jacking bridge:

[0018] S1. Determine the cantilever length and position that needs to be replaced based on the jacking simulation calculation;

[0019] S2. Carry out foundation construction on the ground;

[0020] S3, move the device to the corresponding position through the drag ring;

[0021] S4. First, use the main hydraulic jacking assembly to push the jacking platform upward, and observe the position of the indicator plate relative to the identification frame and adjust the position of the device. When the position of the indicator plate relative to the identification frame is within the controllable range, use the auxiliary hydraulic jacking assembly to push the movable support platform upward to stabilize the support structure;

[0022] S5. Continue the beam pushing operation;

[0023] S6. As the jacking operation proceeds, the auxiliary hydraulic jacking assembly pulls the movable support platform downward, and through the alternating extension of the first electric telescopic rod and the second electric telescopic rod, the driving assembly drives the threaded rod to rotate, so that the positions of the support frame and the movable platform are changed, and the support position is moved;

[0024] S7. After the construction is completed, the main hydraulic jacking assembly and the auxiliary hydraulic jacking assembly are retracted, and the device is pulled away from the construction area through the towing ring.

[0025] The present invention provides a beam replacement device and construction method for a large cantilevered bridge under jacking conditions. It has the following beneficial effects:

[0026] 1. This beam replacement device and construction method based on the large cantilever working condition of the jacking bridge pushes the support roller to contact the bottom of the bridge first through the jacking component, and observes the indicator plate inside the identification frame to obtain the position of the main support position relative to the support frame, which is convenient for quickly determining the required moving direction of the fixed frame, and then quickly determining the main support position, which is convenient for improving the construction speed of the bridge.

[0027] 2. The beam replacement device and construction method based on the large cantilever working condition of the jacking bridge can change the position of the support frame and the movable platform by alternately extending the first electric telescopic rod and the second electric telescopic rod and driving the threaded rod to rotate through the driving component, and move the support position to facilitate the stable change of the already supported support position to the main load-bearing support position, thereby providing a better support structure for bridge construction and thereby improving the construction speed of the bridge.

[0028] 3. The beam replacement device and construction method based on the large cantilever working condition of the jacking bridge pushes the support frame to move by the threaded rod. When the support position is changed, the position of the indicator plate relative to the inside of the identification frame is observed, and the distance between the support position and the main load-bearing position of the device can be judged during movement, thereby facilitating the movement of the support position during jacking construction, achieving a better mobile support effect, and facilitating the improvement of the bridge construction speed. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a schematic diagram of the overall three-dimensional structure of the present invention;

[0030] Figure 2 for Figure 1 A schematic diagram of the enlarged structure of the middle part A;

[0031] Figure 3 for Figure 1 A schematic diagram of the enlarged structure of the middle B part;

[0032] Figure 4 for Figure 1 The enlarged structural diagram of the middle E part;

[0033] Figure 5 It is a schematic diagram of the right three-dimensional structure of the present invention;

[0034] Figure 6 This is a schematic diagram of the rear three-dimensional structure of the present invention;

[0035] Figure 7 This is a schematic diagram of the top three-dimensional structure of the present invention;

[0036] Figure 8 for Figure 1 The enlarged structural diagram of the middle C part;

[0037] Figure 9 for Figure 1 The enlarged structural diagram of the middle D part;

[0038] Figure 10 for Figure 5 Schematic diagram of the enlarged structure of part F in the middle.

[0039] In the figure: 1. Support frame; 2. Main hydraulic jacking assembly; 3. Auxiliary positioning assembly; 301. Jacking platform; 302. Fixed frame; 303. Spring; 304. Support roller; 305. Auxiliary hydraulic jacking assembly; 306. Movable support platform; 307. First connecting plate; 308. Second connecting plate; 309. Indicator plate; 310. Identification frame; 4. Moving assembly; 401. Moving platform; 402. Sliding wheel; 403. Threaded rod; 404. Driving assembly; 405. Moving wheel; 406. Fixed plate; 407. First electric telescopic rod; 408. Fixed head; 409. Second electric telescopic rod; 410. Drag ring. DETAILED DESCRIPTION

[0040] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0041] Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, but are not to be construed as limiting the present invention.

[0042] Example 1: Please refer to Figure 1-7 The present invention provides a technical solution: a beam replacement device based on a large cantilever working condition of a jacking bridge, comprising a support frame 1, a main hydraulic jacking assembly 2 is fixedly connected to the top of the support frame 1, an auxiliary positioning assembly 3 is fixedly connected to the top of the main hydraulic jacking assembly 2, and a moving assembly 4 is provided at the bottom of the support frame 1;

[0043] The auxiliary positioning component 3 includes:

[0044] The jacking platform 301 is fixedly connected to the top of the main hydraulic jacking assembly 2.

[0045] Two fixing frames 302 are provided, and both fixing frames 302 are movably connected to the top of the jacking platform 301;

[0046] Support roller 304, support roller 304 is movably connected to the top of the fixing frame 302;

[0047] The main hydraulic jacking assembly 2 pushes the jacking platform 301 upwards and makes the top of the spring 303 contact the bottom of the beam body for pre-jacking.

[0048] When the beam is lifted, the top and bottom plate cantilevers of the bridge will bear the lateral bend to form a bend. Whether the position of the underpinning is the main gravity bearing area can be determined by whether the beam is tilted. The bottom of the fixed frame 302 is fixedly connected to the spring 303, and the bottom of the spring 303 is fixedly connected to the jacking platform 301. One of the fixed frames 302 is movably connected to the second connecting plate 308 on the front, and the other fixed frame 302 is movably connected to the first connecting plate 307 on the front. The first connecting plate 307 is movably connected to the second connecting plate 308, and the first connecting plate 307 and the second connecting plate 308 can form a retractable movable rod.

[0049] When the main hydraulic jacking assembly 2 pushes the jacking platform 301 upward, the jacking platform 301 will first push the support rollers 304 upward through the two fixing frames 302, so that the support rollers 304 will first contact the bottom of the bridge. As the main hydraulic jacking assembly 2 continues to push upward, the fixing frames 302 can support the beam. If the support position is not the main load-bearing part of the bridge, the bridge will tilt at the top of the jacking platform 301. The support rollers 304 will contact the bottom of the beam under the push of the corresponding springs 303, thereby causing the two support rollers 304 to be at different heights, and then the main load-bearing position is detected, further lengthening the distance between the two support rollers 304, thereby causing the first connecting plate 307 and the second connecting plate 308 to be pulled up, and at the same time causing the first connecting plate 307 and the second connecting plate 308 to tilt, and adjusting the support position according to the tilt direction of the second connecting plate 308 and the first connecting plate 307.

[0050] The amount of deviation can be judged by the height difference between the two support rollers 304. By amplifying the deviation value, the position can be better adjusted. An indicator plate 309 is fixedly connected to the bottom of the second connecting plate 308, and an identification frame 310 is fixedly connected to the front of the support frame 1. The indicator plate 309 is arranged inside the identification frame 310.

[0051] The two supporting rollers 304 produce a height difference, causing the second connecting plate 308 and the first connecting plate 307 to tilt, and causing the indicator plate 309 to have an angular deviation from the vertical direction, and the position of the indicator plate 309 in the identification frame 310 moves. When the indicator plate 309 moves to the left inside the identification frame 310, the supporting device is moved to the right until the indicator plate 309 is close to the indicating position in the middle of the identification frame 310. When the indicator plate 309 moves to the right inside the identification frame 310, the supporting device is moved to the left until the indicator plate 309 is close to the indicating position in the middle of the identification frame 310, so as to facilitate the correction of the support position.

[0052] Increasing the support area can increase the stability of the support. The top of the jacking platform 301 is fixedly connected to a secondary hydraulic jacking component 305, and the top of the secondary hydraulic jacking component 305 is movably connected to a movable support platform 306.

[0053] By lifting the movable support platform 306 upwards through the auxiliary hydraulic jacking assembly 305, the top of the movable support platform 306 and the top of the beam body are supported, thereby increasing the support area and further increasing the stability of the support.

[0054] Example 2: Please refer to Figure 1-10 Based on the first embodiment, the present invention provides a technical solution:

[0055] When supporting the beam, the support frame 1 is moved to change the supporting position of the beam. The moving component 4 includes a moving platform 401, which is movably connected to the bottom of the support frame 1. Several sliding wheels 402 are movably connected to the bottom of the support frame 1. The inside of the moving platform 401 is movably connected to a threaded rod 403, and the threaded rod 403 is movably connected to the inside of the moving platform 401. A driving component 404 is fixedly connected to the right side of the moving platform 401, and the driving component 404 is transmission-connected to the threaded rod 403. A moving wheel 405 is fixedly connected to the bottom of the moving platform 401, and a towing ring 410 is fixedly connected to the left side of the moving platform 401. The device can be connected to the towing ring 410 through a connecting structure by dragging equipment, so as to facilitate moving the device to the corresponding position.

[0056] When supporting the beam, the spring 303 can be driven to rotate by the driving component 404 to push the support frame 1, so that the support frame 1 moves along the top of the movable platform 401 under the action of the sliding wheel 402, so as to change the position of the support frame 1, and then change the support position of the device for the beam. When supporting the beam, the auxiliary hydraulic jacking component 305 can be contracted to move the movable support platform 306 downward, so that the two support rollers 304 temporarily assume the supporting structure. At this time, the driving component 404 can drive the threaded rod 403 to rotate, pushing the support frame 1 to move, so as to change the support position of the beam.

[0057] Moving the position of the movable platform 401 can expand the moving range of the support frame 1, making it easier to change the supporting position of the beam body. The outer wall of the support frame 1 is fixedly connected to a fixed plate 406, the bottom of the fixed plate 406 is fixedly connected to a first electric telescopic rod 407, and the bottom of the first electric telescopic rod 407 is fixedly connected to a fixed head 408.

[0058] The first electric telescopic rod 407 is controlled to extend so that the first electric telescopic rod 407 inserts the fixed head 408 into the ground, and the position of the support frame 1 is fixed by the fixing plate 406. At this time, the threaded rod 403 is driven to rotate by the driving assembly 404. Since the bottom of the mobile platform 401 is supported on the ground by the moving wheels 405, the rotation of the threaded rod 403 will push the mobile platform 401 to move on the ground, thereby changing the moving range of the support frame 1.

[0059] The threaded rod 403 pushes the support frame 1 to move while fixing the support frame 1. When pushing the support frame 1 to move, the mobile platform 401 is fixed, which can increase the stability of the mobile support frame 1 during support. The left and right sides of the mobile platform 401 are fixedly connected to the second electric telescopic rod 409, and the bottom of the second electric telescopic rod 409 is fixedly connected to the fixed head 408.

[0060] The first electric telescopic rod 407 is contracted, the second electric telescopic rod 409 is extended, and the corresponding fixed head 408 at the bottom is inserted into the ground to fix the position of the mobile platform 401. At this time, the driving component 404 drives the threaded rod 403 to rotate to change the position of the support frame 1, which is more stable. At the same time, when the threaded rod 403 is used to push the support frame 1 to move and change the support position, the distance between the support position of the device and the main load-bearing position is judged by observing the position of the indicator plate 309 relative to the inside of the identification frame 310, thereby facilitating a better mobile support effect during jacking construction.

[0061] Example 3: Please refer to Figure 1-10 Based on the first and second embodiments, the present invention provides a technical solution:

[0062] A construction method for a beam underpinning device under the large cantilever working condition of a jacking bridge:

[0063] S1. Determine the cantilever length and position that needs to be replaced based on the jacking simulation calculation;

[0064] S2. Carry out foundation construction on the ground;

[0065] S3, moving the device to the corresponding position through the drag ring 410;

[0066] S4. First, the jacking platform 301 is pushed upward by the main hydraulic jacking assembly 2. The position of the indicator plate 309 relative to the identification frame 310 is observed and the position of the device is adjusted. When the position of the indicator plate 309 relative to the identification frame 310 is within the controllable range, the movable support platform 306 is pushed upward by the auxiliary hydraulic jacking assembly 305 to stabilize the support structure.

[0067] S5. Continue the beam pushing operation;

[0068] S6. As the jacking operation proceeds, the auxiliary hydraulic jacking assembly 305 pulls the movable support platform 306 downward, and through the alternating extension of the first electric telescopic rod 407 and the second electric telescopic rod 409, the driving assembly 404 drives the threaded rod 403 to rotate, so that the positions of the support frame 1 and the movable platform 401 are changed, and the support position is moved;

[0069] S7. After the construction is completed, the main hydraulic jacking assembly 2 and the auxiliary hydraulic jacking assembly 305 are retracted, and the device is pulled away from the construction area through the towing ring 410.

[0070] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solution and inventive concept of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A beam replacement device based on a large cantilever working condition of a jacking bridge, comprising a support frame (1), characterized in that: The top of the support frame (1) is fixedly connected to a main hydraulic jacking assembly (2), the top of the main hydraulic jacking assembly (2) is fixedly connected to an auxiliary positioning assembly (3), and the bottom of the support frame (1) is provided with a moving assembly (4); The auxiliary positioning component (3) comprises: A jacking platform (301), wherein the jacking platform (301) is fixedly connected to the top of the main hydraulic jacking assembly (2); A fixing frame (302), wherein two fixing frames (302) are provided, and both fixing frames (302) are movably connected to the top of the jacking platform (301); A supporting roller (304) is movably connected to the top of the fixing frame (302).

2. The beam underpinning device for a jacking bridge under a large cantilever condition according to claim 1 is characterized in that: The bottom of the fixing frame (302) is fixedly connected to a spring (303), and the bottom of the spring (303) is fixedly connected to the jacking platform (301). One of the fixing frames (302) is movably connected to a second connecting plate (308) on the front, and the other fixing frame (302) is movably connected to a first connecting plate (307) on the front, and the first connecting plate (307) is movably connected to the second connecting plate (308).

3. The beam underpinning device for a jacking bridge under a large cantilever condition according to claim 2 is characterized in that: The bottom of the second connecting plate (308) is fixedly connected to an indicator plate (309), the front of the support frame (1) is fixedly connected to an identification frame (310), and the indicator plate (309) is arranged inside the identification frame (310).

4. The beam underpinning device for a jacking bridge under a large cantilever condition according to claim 3 is characterized in that: The top of the jacking platform (301) is fixedly connected to a secondary hydraulic jacking assembly (305), and the top of the secondary hydraulic jacking assembly (305) is movably connected to a movable support platform (306).

5. The beam underpinning device for a jacking bridge under a large cantilever condition according to claim 4 is characterized in that: The moving assembly (4) includes a moving platform (401), the moving platform (401) is movably connected to the bottom of the support frame (1), the bottom of the support frame (1) is movably connected to a plurality of sliding wheels (402), the interior of the moving platform (401) is movably connected to a threaded rod (403), the threaded rod (403) is movably connected to the interior of the moving platform (401), the right side of the moving platform (401) is fixedly connected to a driving assembly (404), and the driving assembly (404) is transmission-connected to the threaded rod (403), the bottom of the moving platform (401) is fixedly connected to a moving wheel (405), and the left side of the moving platform (401) is fixedly connected to a towing ring (410).

6. The beam underpinning device for a jacking bridge under a large cantilever condition according to claim 5 is characterized in that: The outer wall of the support frame (1) is fixedly connected to a fixing plate (406), the bottom of the fixing plate (406) is fixedly connected to a first electric telescopic rod (407), and the bottom of the first electric telescopic rod (407) is fixedly connected to a fixing head (408).

7. The beam underpinning device for a jacking bridge under a large cantilever condition according to claim 6 is characterized in that: The left and right sides of the mobile platform (401) are both fixedly connected to second electric telescopic rods (409), and the bottom of the second electric telescopic rod (409) is fixedly connected to a fixed head (408).

8. A construction method using the beam underpinning device of claim 7 under the condition of a large cantilever of a jacking bridge, characterized in that: S1. Determine the cantilever length and position that needs to be replaced based on the jacking simulation calculation; S2. Carry out foundation construction on the ground; S3, moving the device to a corresponding position via the drag ring (410); S4, first, the jacking platform (301) is pushed upward by the main hydraulic jacking assembly (2), and the position of the indicator plate (309) relative to the identification frame (310) is observed and the position of the device is adjusted. When the position of the indicator plate (309) relative to the identification frame (310) is within a controllable range, the movable support platform (306) is pushed upward by the auxiliary hydraulic jacking assembly (305) to stabilize the support structure; S5. Continue the beam pushing operation; S6. As the jacking operation proceeds, the auxiliary hydraulic jacking assembly (305) pulls the movable support platform (306) downward, and through the alternating extension of the first electric telescopic rod (407) and the second electric telescopic rod (409), the driving assembly (404) drives the threaded rod (403) to rotate, so that the positions of the support frame (1) and the movable platform (401) are changed, and the support position is moved; S7. After the construction is completed, the main hydraulic jacking assembly (2) and the auxiliary hydraulic jacking assembly (305) are retracted, and the device is pulled away from the construction area through the towing ring (410).

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