Jacking and stabilizing structure for old bridge of multi-span simply supported girder bridge

Abstract

The utility model discloses a multi-span simply supported girder bridge old bridge jacking and stabilizing structure, which belongs to the technical field of bridge engineering, and is characterized by comprising an old bridge body, a fixing plate is arranged at the bottom of the old bridge body, a jacking structure is clamped on the inner wall of the fixing plate, a jacking frame is arranged at the top of the jacking structure, and the jacking frame is connected with the old bridge body. The front side and the rear side of the jacking frame are in bolted connection with stabilizing mechanisms, the surface of the jacking structure is sleeved with a reinforcing mechanism, and the inner wall of the reinforcing mechanism is movably connected with a limiting assembly. The problems that a jacking structure is prone to inclining, the debugging stability of the jacking structure during jacking is poor, and most jacking stable structures at present are not provided with real-time detection structures during use, so that displacement changes of a bridge during jacking are inconvenient to find in time are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of bridge engineering, and particularly relates to a jacking and stabilizing structure for an old multi-span simply supported beam bridge. Background Technique

[0002] The jacking and stabilizing structure for an old multi-span simply supported beam bridge is an engineering structure system specifically used for jacking an existing multi-span simply supported beam bridge and keeping it stable. It usually consists of a series of jacking devices, support structures, connecting members, monitoring and control systems, etc. When the traffic flow increases and the load standard is improved, the old multi-span simply supported beam bridge is jacked and reinforced so that it can bear greater loads.

[0003] Most of the reinforcement methods can only unilaterally stabilize the bridge's ability to bear live loads and are not helpful for the beam body to resist its own weight and increase its bearing capacity;

[0004] The existing patent (publication number: CN216108151U) discloses a reinforcement structure for a simply supported beam bridge. A bridge slab is erected between the capping beams of two abutments of the original simply supported beam bridge. The reinforcement structure includes a reinforced corrugated top plate and a corrugated plate bearing platform. Two groups of corrugated plate bearing platforms are respectively arranged under the capping beams on both sides. This utility model generates prestress through the reinforced corrugated top plate bent upward in an arc shape. The reinforced corrugated top plate provides an upward stable supporting force for the bridge slab through pressure-resistant blocks, thereby realizing the reinforcement of old bridges and dangerous bridges, solving problems such as the sinking and cracking of the old bridge and dangerous bridge bodies, and at the same time improving the bending and shear bearing capacity of the bridge, with remarkable reinforcement effects.

[0005] In view of the above problems, the existing patent gives a solution. Most of the jacking structures during the jacking of an old multi-span simply supported beam bridge are placed separately. When there is no contact object at the top of the jacking structure during debugging, it is easy to cause the jacking structure to tilt, and the debugging stability during the jacking of the jacking structure is poor. Moreover, most of the current jacking and stabilizing structures do not have a real-time detection structure during use, which is not convenient for timely discovering the displacement changes of the bridge during jacking and is not convenient for users to use.

[0006] Therefore, a jacking and stabilizing structure for an old multi-span simply supported beam bridge is proposed. Content of the Utility Model

[0007] The purpose of the utility model is to provide a jacking and stabilizing structure for an old multi-span simply supported beam bridge, which can solve the problems that most of the jacking structures during the jacking of an old multi-span simply supported beam bridge are placed separately. When there is no contact object at the top of the jacking structure during debugging, it is easy to cause the jacking structure to tilt, and the debugging stability during the jacking of the jacking structure is poor. Moreover, most of the current jacking and stabilizing structures do not have a real-time detection structure during use, which is not convenient for timely discovering the displacement changes of the bridge during jacking.

[0008] To achieve the above object, the present utility model provides the following technical solutions: An old bridge jacking and stabilizing structure for a multi-span simply supported beam bridge, including an old bridge body. A fixing plate is provided at the bottom of the old bridge body. A jacking structure is clamped inside the fixing plate. A jacking frame is provided at the top of the jacking structure. Stabilizing mechanisms are bolted to the front side and the rear side of the jacking frame respectively. A strengthening mechanism is sleeved on the surface of the jacking structure. A limiting component is movably connected to the inner wall of the strengthening mechanism;

[0009] The stabilizing mechanism includes a stabilizing frame, a detection head and a pressure sensor. The bottom of the detection head is bolted to the top of the pressure sensor. The side of the pressure sensor close to the stabilizing frame is bolted to the stabilizing frame. The side of the stabilizing frame close to the jacking frame is bolted to the jacking frame.

[0010] Preferably, the strengthening mechanism includes a limiting box, an annular frame and a knob. The left side of the limiting box is bolted to the right side of the annular frame. The surface of the limiting component is movably connected to the inner wall of the limiting box. The surface of the knob is threadedly connected to the inner wall of the annular frame.

[0011] Preferably, a first nut is threadedly connected to the surface of the limiting component. The left side of the first nut is in close contact with the right side of the limiting box. A second nut is threadedly connected to the surface of the limiting component. The right side of the second nut is in close contact with the inner wall of the limiting box.

[0012] Preferably, the limiting component includes a movable frame and a screw rod. The right side of the screw rod is bolted to the left side of the movable frame. The surface of the screw rod is movably connected to the inner wall of the limiting box.

[0013] Preferably, an activity hole for cooperating with the jacking structure is formed in the inner wall of the annular frame. A threaded hole for cooperating with the knob is formed in the inner wall of the annular frame.

[0014] Preferably, an installation hole for cooperating with the screw rod is formed in the inner wall of the limiting box. An installation groove is formed in the inner wall of the limiting box.

[0015] Preferably, a positioning frame is bolted to the bottom of the jacking frame. The surface of the jacking structure is clamped inside the inner wall of the positioning frame.

[0016] Preferably, a protective frame is provided at the bottom of the old bridge body. A fixing groove is formed in the inner wall of the fixing plate.

[0017] Compared with the prior art, the beneficial effects of the present utility model are:

[0018] 1. This application sets a stabilizing mechanism, and fixes the position of the detection head and the pressure sensor during use, so that the stabilizing frame can be driven by the positioning structure to perform stable lifting. During the lifting process of the stabilizing frame, the pressure sensor and the detection head can be driven to perform stable detection, so as to monitor the displacement changes during the lifting process in real time and ensure the accuracy and synchronization of the lifting.

[0019] 2. The present application sets up a reinforcing mechanism, which is sleeved on the surface of the jacking structure when in use, and the limiting component is installed on the surface of the jacking structure on the other side. When the jacking on both sides is performed for fixing and debugging, the limiting component is inserted into the inner wall of the reinforcing mechanism, and then the position of the limiting component is limited, so as to facilitate the subsequent stabilization and reinforcement work through the reinforcing mechanism and the limiting component, avoid the displacement and shaking of the positioning structure in subsequent use, and increase the stability of the jacking structure when in use. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is the overall structural diagram of the old bridge jacking and stabilizing structure of the multi-span simply supported beam bridge of the utility model;

[0021] Figure 2 It is a structural diagram of the jacking structure of the utility model;

[0022] Figure 3 It is a front view of the old bridge body of the utility model;

[0023] Figure 4 This is a structural diagram of the stabilizing mechanism of the utility model;

[0024] Figure 5 This is a structural diagram of the jacking frame of the utility model;

[0025] Figure 6 It is a structural diagram of the strengthening mechanism of the utility model.

[0026] In the figure, 1. old bridge body; 2. stabilizing mechanism; 201. stabilizing frame; 202. detection head; 203. pressure sensor; 3. strengthening mechanism; 301. limit box; 302. ring frame; 303. knob; 4. limit assembly; 401. movable frame; 402. screw; 5. fixing plate; 6. lifting structure; 7. lifting frame; 8. first nut; 9. second nut; 10. movable hole; 11. fixing groove; 12. threaded hole; 13. mounting hole; 14. mounting groove; 15. positioning frame; 16. protective frame. DETAILED DESCRIPTION

[0027] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0028] Please refer to Figure 1-6 , the present invention provides a technical solution:

[0029] A jacking and stabilizing structure for an old multi-span simply supported beam bridge includes an old bridge body 1. A fixing plate 5 is arranged at the bottom of the old bridge body 1. A jacking structure 6 is clamped inside the fixing plate 5. A jacking frame 7 is arranged at the top of the jacking structure 6. Stabilizing mechanisms 2 are bolted to the front side and the rear side of the jacking frame 7 respectively. A strengthening mechanism 3 is sleeved on the surface of the jacking structure 6. A limiting component 4 is movably connected to the inner wall of the strengthening mechanism 3.

[0030] The stabilizing mechanism 2 includes a stabilizing frame 201, a detection head 202 and a pressure sensor 203. The bottom of the detection head 202 is bolted to the top of the pressure sensor 203. The side of the pressure sensor 203 close to the stabilizing frame 201 is bolted to the stabilizing frame 201. The side of the stabilizing frame 201 close to the jacking frame 7 is bolted to the jacking frame 7.

[0031] In this embodiment: By setting the stabilizing mechanism 2, during use, the positions of the detection head 202 and the pressure sensor 203 are fixed, which is convenient for driving the stabilizing frame 201 to perform stable jacking work through the positioning structure later. During the jacking process of the stabilizing frame, it will drive the pressure sensor 203 and the detection head 202 to perform stable detection work, which is convenient for real-time monitoring of the displacement change during the jacking process to ensure the accuracy and synchronism of the jacking. By setting the strengthening mechanism 3, during use, the strengthening mechanism 3 is sleeved on the surface of the jacking structure 6, and the limiting component 4 is installed on the surface of the other jacking structure 6. When fixing and debugging the jacking on both sides, the limiting component 4 is inserted into the inner wall of the strengthening mechanism 3, and then the position of the limiting component 4 is restricted, which is convenient for subsequent work of stabilizing and strengthening through the strengthening mechanism 3 and the limiting component 4, avoiding the displacement and shaking of the positioning structure during subsequent use, and increasing the stability of the jacking structure 6 during use.

[0032] Specifically, as Figure 3 , Figure 4 , Figure 6 shown, the strengthening mechanism 3 includes a limiting box 301, an annular frame 302 and a knob 303. The left side of the limiting box 301 is bolted to the right side of the annular frame 302. The surface of the limiting component 4 is movably connected to the inner wall of the limiting box 301. The surface of the knob 303 is threadedly connected to the inner wall of the annular frame 302.

[0033] Specifically, as Figure 6 shown, a first nut 8 is threadedly connected to the surface of the limit component 4, the left side of the first nut 8 is in close contact with the right side of the limit box 301, a second nut 9 is threadedly connected to the surface of the limit component 4, and the right side of the second nut 9 is in close contact with the inner wall of the limit box 301.

[0034] Specifically, as Figure 3 , Figure 4 , Figure 6 shown, the limit component 4 includes a movable frame 401 and a screw rod 402. The right side of the screw rod 402 is bolted to the left side of the movable frame 401, and the surface of the screw rod 402 is movably connected to the inner wall of the limit box 301.

[0035] In this embodiment: By fixing the position of the limit and with the annular frame 302, and fixing the position of the screw rod 402 and the movable frame 401, it is convenient for the subsequent movable frame 401 to drive the screw rod 402 to insert into the inner wall of the limit box 301. Then, the first nut 8 pre-installed on the surface of the screw rod 402 is rotated to a suitable position. Then, the second nut 9 is rotated on the surface of the screw rod 402 so that the right side of the second nut 9 is in close contact with the inner wall of the limit box 301. Then, the first nut 8 is rotated on the surface of the screw rod 402 so that the left side of the first nut 8 is in contact with the right side of the limit box 301, which is convenient for the stable limiting work of the annular frame 302 and the movable frame 401.

[0036] Specifically, as Figure 6 shown, a movable hole 10 for cooperating with the jacking structure 6 is provided in the inner wall of the annular frame 302, and a threaded hole 12 for cooperating with the knob 303 is provided in the inner wall of the annular frame 302.

[0037] Specifically, as Figure 6 shown, an installation hole 13 for cooperating with the screw rod 402 is provided in the inner wall of the limit box 301, and an installation groove 14 is provided in the inner wall of the limit box 301.

[0038] In this embodiment: Through the movable hole 10 provided in the inner wall of the annular frame 302, it is convenient for the annular frame 302 to be installed on the surface of the jacking structure 6 through the movable hole 10. Through the threaded hole 12 provided in the inner wall of the annular frame 302, it is convenient for the knob 303 to be threadedly connected to the annular frame 302. Through the installation hole 13 provided in the inner wall of the limit box 301, it is convenient for the screw rod 402 to move in the inner wall of the limit box 301 through the installation hole 13. Through the installation groove 14 provided in the inner wall of the limit box 301, it is convenient for the subsequent installation work of the second nut 9, which is convenient for the user to use.

[0039] Specifically, as Figure 5 shown, a positioning frame 15 is bolted to the bottom of the jacking frame 7, and the surface of the jacking structure 6 is clamped to the inner wall of the positioning frame 15.

[0040] Specifically, as Figure 1 , Figure 4 shown, a protective frame 16 is provided at the bottom of the old bridge body 1, and a fixing groove 11 is formed in the inner wall of the fixing plate 5.

[0041] In this embodiment: The positions of the positioning frame 15 and the jacking frame 7 are fixed, facilitating the subsequent stable jacking work of the jacking structure 6 through the positioning frame 15, and avoiding the dislocation of the jacking structure 6 during jacking. By providing the protective frame 16, it is convenient to further protect the old bridge body 1 through the protective frame 16, facilitating the use by the user.

[0042] Working principle: During the use of the old bridge body 1, the positions of the detection head 202 and the pressure sensor 203 are fixed, facilitating the subsequent stable jacking work of driving the stabilizing frame 201 through the positioning structure. During the jacking process of the stabilizing frame, it will drive the pressure sensor 203 and the detection head 202 to perform stable detection work, facilitating the real-time monitoring of the displacement change during the jacking process, ensuring the accuracy and synchronization of jacking. By providing the strengthening mechanism 3, when in use, the strengthening mechanism 3 is sleeved on the surface of the jacking structure 6, and the limiting component 4 is installed on the surface of the other jacking structure 6. When the two-sided jacking is fixed and debugged, the limiting component 4 is inserted into the inner wall of the strengthening mechanism 3, and then the position of the limiting component 4 is restricted, facilitating the subsequent stable strengthening work through the strengthening mechanism 3 and the limiting component 4, avoiding the displacement and shaking of the positioning structure during subsequent use, and increasing the stability of the jacking structure 6 during use. The positions of the positioning frame 15 and the jacking frame 7 are fixed, facilitating the subsequent stable jacking work of the jacking structure 6 through the positioning frame 15, and avoiding the dislocation of the jacking structure 6 during jacking. By providing the protective frame 16, it is convenient to further protect the old bridge body 1 through the protective frame 16, facilitating the use by the user.

[0043] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A multi-span simply supported beam bridge old bridge jacking and stabilization structure, comprising an old bridge body (1), characterized in that: A fixing plate (5) is provided at the bottom of the old bridge body (1), a lifting structure (6) is clamped on the inner wall of the fixing plate (5), a lifting frame (7) is provided on the top of the lifting structure (6), a stabilizing mechanism (2) is bolted to the front and rear sides of the lifting frame (7), a reinforcing mechanism (3) is sleeved on the surface of the lifting structure (6), and the inner wall of the reinforcing mechanism (3) is movably connected to a limiting component (4); The stabilizing mechanism (2) comprises a stabilizing frame (201), a detection head (202) and a pressure sensor (203); the bottom of the detection head (202) is bolted to the top of the pressure sensor (203); the side of the pressure sensor (203) close to the stabilizing frame (201) is bolted to the stabilizing frame (201); and the side of the stabilizing frame (201) close to the lifting frame (7) is bolted to the lifting frame (7).

2. The old bridge jacking and stabilizing structure of a multi-span simply supported beam bridge according to claim 1 is characterized in that: The reinforcing mechanism (3) comprises a limit box (301), an annular frame (302) and a knob (303); the left side of the limit box (301) is bolted to the right side of the annular frame (302); the surface of the limit assembly (4) is movably connected to the inner wall of the limit box (301); and the surface of the knob (303) is threadedly connected to the inner wall of the annular frame (302).

3. The old bridge jacking and stabilizing structure of a multi-span simply supported beam bridge according to claim 2 is characterized in that: A first nut (8) is threadedly connected to the surface of the limiting component (4), and the left side of the first nut (8) is in close contact with the right side of the limiting box (301). A second nut (9) is threadedly connected to the surface of the limiting component (4), and the right side of the second nut (9) is in close contact with the inner wall of the limiting box (301).

4. The old bridge jacking and stabilizing structure of a multi-span simply supported beam bridge according to claim 2 is characterized in that: The limiting assembly (4) comprises a movable frame (401) and a screw rod (402), the right side of the screw rod (402) is bolted to the left side of the movable frame (401), and the surface of the screw rod (402) is movably connected to the inner wall of the limiting box (301).

5. The old bridge jacking and stabilizing structure of a multi-span simply supported beam bridge according to claim 2 is characterized in that: The inner wall of the annular frame (302) is provided with a movable hole (10) for use in conjunction with the lifting structure (6), and the inner wall of the annular frame (302) is provided with a threaded hole (12) for use in conjunction with the knob (303).

6. The old bridge jacking and stabilizing structure of a multi-span simply supported beam bridge according to claim 4 is characterized in that: The inner wall of the limit box (301) is provided with a mounting hole (13) for use with the screw rod (402), and the inner wall of the limit box (301) is provided with a mounting groove (14).

7. The old bridge jacking and stabilizing structure of a multi-span simply supported beam bridge according to claim 1 is characterized by: A positioning frame (15) is bolted to the bottom of the lifting frame (7), and the surface of the lifting structure (6) is clamped with the inner wall of the positioning frame (15).

8. The old bridge jacking and stabilizing structure of a multi-span simply supported beam bridge according to claim 1 is characterized in that: A protective frame (16) is provided at the bottom of the old bridge body (1), and a fixing groove (11) is provided on the inner wall of the fixing plate (5).

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