Equipment and method for lifting and replacing support of existing bridge on bridge floor

Abstract

The invention discloses a device and method for lifting and replacing a support of an existing bridge on a bridge deck, the device comprises bridges, a bridge-crossing connecting beam, a steel support, a steel distribution beam, a constant mechanism, a jacking mechanism, a lifting mechanism and a sensing mechanism, the bridges are oppositely arranged left and right, and the bridge-crossing connecting beam is arranged between the two opposite bridges; the steel supports are evenly arranged on the top of the bridge, the steel distribution beams are arranged on the tops of the steel supports, the constant mechanisms, the jacking mechanisms and the lifting mechanisms are all arranged on the steel distribution beams, and the sensing mechanisms are arranged on the span bridge connecting beams and the jacking mechanisms. According to the scheme, equipment is designed from multiple dimensions, a stable, universal, safe and controllable foundation is provided for replacing supports for bridge floor lifting of an existing bridge, the device is adaptive to different bridges, and real-time monitoring of jacking is guaranteed; meanwhile, by means of efficient equipment utilization, clear force transmission logic and real-time monitoring, efficient and safe construction, energy conservation and environmental protection are achieved, and adverse effects on the environment and traffic are reduced.

Description

Technical Field

[0001] This invention relates to the field of bridge bearing replacement technology, specifically to a device and method for replacing bearings on the deck of an existing bridge. Background Technology

[0002] In urban renewal construction, bridge jacking and bearing replacement is of paramount importance in the renovation of existing bridges. By replacing damaged or aging bearings, the safety and stability of the existing bridge structure can be ensured, the service life of the bridge can be extended, the load-bearing capacity and seismic performance of the bridge can be improved, and the efficiency of bridge use can be increased. It can be carried out without affecting or minimizing traffic, reducing the impact on urban traffic, and is also more energy-efficient and environmentally friendly.

[0003] Traditional methods for replacing bearings on existing bridges include steel support jacking, corbel jacking, and direct jacking from the pier top.

[0004] I. Lifting and replacing steel supports Replacing the bearing with a steel support requires setting up a separate reaction foundation and installing steel supports. Jacks are then installed on the steel supports, and finally, depending on the beam structure, a distribution beam is installed to lift the beam. This construction requires setting up a reaction foundation, excavating the existing abutment or setting up a new reaction foundation, and installing the lifting steel supports and distribution beams. The construction is complex, time-consuming, and involves a large workload. Furthermore, if there are non-removable obstacles such as highways, national cables, or other structures under the existing bridge, a new reaction foundation cannot be constructed under the bridge, making this method unsuitable.

[0005] II. Direct jacking up the pier top to replace the bearing Direct jacking to replace bearings involves installing jacks directly around the bearings on the pier top and jacking the beam to replace the bearings. This method is only suitable when there is sufficient space between the pier top and the bottom of the beam and the beam is relatively light.

[0006] III. Replacement of Supports for the Cow-Leg Lifting System The corbel lifting and replacement bearing method involves installing corbels with reinforcing bars on the side of the cap beam, and then using jacks mounted on the corbels to directly lift the beam body to replace the bearing. This method cannot be used when the cap beam has an irregular shape or insufficient height.

[0007] The three existing methods for replacing bearings in existing bridges—steel support jacking, corbel jacking, and direct jacking at the pier top—all have limitations in their applicability. Furthermore, some methods involve complex construction, long construction periods, and large project volumes, making it difficult to meet the bearing replacement needs of all existing bridge renovations.

[0008] In situations where traditional jacking and bearing replacement methods are not feasible, this invention provides a method and equipment for replacing bearings on existing bridges by lifting the bridge deck, thus fulfilling the need for the renovation of existing bridges.

[0009] Therefore, a solution is needed. Summary of the Invention

[0010] (a) Technical problems to be solved To address the shortcomings of existing technologies, this invention provides a device and method for replacing bearings on the bridge deck of an existing bridge, thereby solving the problems mentioned in the background section.

[0011] (II) Technical Solution To achieve the above objectives, the present invention provides the following technical solution: A device for replacing bearings on an existing bridge deck includes a bridge, a bridge connecting beam, steel supports, steel distribution beams, a constant-pressure mechanism, a jacking mechanism, a lifting mechanism, and a sensing mechanism. The bridges are arranged opposite each other, the bridge connecting beams are arranged between the two opposite bridges, the steel supports are evenly arranged on the top of the bridges, the steel distribution beams are arranged on the top of each steel support, the constant-pressure mechanism, the jacking mechanism, and the lifting mechanism are all arranged on each steel distribution beam, and the sensing mechanism is arranged on the bridge connecting beams and the jacking mechanism. The constant mechanism includes a nut, a washer, an upper fine-rolled threaded steel bar, a lower fine-rolled threaded steel bar, and a fine-rolled threaded steel bar connecting sleeve. The washer is located at the top of each steel distribution beam and at the end of the steel distribution beam away from the bridge connecting beam along its length. The nut is located at the top of each washer. The upper fine-rolled threaded steel bar extends downward through the nut, washer, and steel distribution beam. The lower fine-rolled threaded steel bar is located inside the bridge corresponding to the position of each upper fine-rolled threaded steel bar. The fine-rolled threaded steel bar connecting sleeve is fitted onto the bottom of each set of upper fine-rolled threaded steel bars and the top of each set of lower fine-rolled threaded steel bars.

[0012] Preferably, the bridge connecting beam has a trapezoidal structure, the steel supports are opposite and symmetrically distributed at the top of the left and right bridges near the opposite ends along the width direction of the bridge, and the steel distribution beam has a cuboid structure and is installed on the top of each steel support along the length direction of the bridge, with the steel supports located at the center of each steel distribution beam.

[0013] Preferably, each of the lower fine-rolled threaded steel bars is implanted into the interior of the bridge deck by means of rebar anchoring, and the top of each of the lower fine-rolled threaded steel bars abuts against the corresponding upper fine-rolled threaded steel bar.

[0014] Preferably, the lifting mechanism includes an upper fully automatic mechanical screw lock, a lower fully automatic mechanical screw lock, and a through-hole jack. The upper and lower fully automatic mechanical screw locks are arranged in an upper and lower structure on the top of each steel distribution beam and are opposite to the position of the nut on the steel distribution beam currently in which they are located. The through-hole jack is arranged between each set of upper and lower fully automatic mechanical screw locks.

[0015] Preferably, the upper fully automatic mechanical screw lock and the lower fully automatic mechanical screw lock are distributed opposite to each of the through-hole jacks along the width direction of the bridge, and the upper fully automatic mechanical screw lock, the lower fully automatic mechanical screw lock and the through-hole jack are integrally formed.

[0016] Preferably, the lifting mechanism includes an upper fine-rolled threaded steel bar II, a lower fine-rolled threaded steel bar II, and a fine-rolled threaded steel bar connecting sleeve II. The upper fine-rolled threaded steel bar II passes through each set of upper fully automatic mechanical auger locks, through-hole jacks, and lower fully automatic mechanical auger locks from top to bottom and continues to extend downward through the steel distribution beam. The lower fine-rolled threaded steel bar II is positioned inside the bridge corresponding to the position of each upper fine-rolled threaded steel bar II. The fine-rolled threaded steel bar connecting sleeve II is sleeved on the bottom of each set of upper fine-rolled threaded steel bars I and the top of each set of lower fine-rolled threaded steel bars I.

[0017] Preferably, each of the lower fine-rolled threaded steel bars is implanted into the interior of the bridge deck by means of rebar anchoring, and the top of each of the lower fine-rolled threaded steel bars abuts against the corresponding upper fine-rolled threaded steel bar.

[0018] Preferably, the sensing mechanism includes a displacement sensor and a pressure sensor. The displacement sensors are oppositely arranged at both ends of the cross-bridge connecting beam in the width direction and each pair is located at both ends of the bridge connecting beam in the length direction. The pressure sensor is arranged at the side end of each of the lower fully automatic mechanical screw locks.

[0019] Based on the above-mentioned equipment, a method for replacing bearings on an existing bridge deck is also included, the method being as follows: Step 1: Install the bridge deck lifting equipment of this plan into its initial operating state according to the positional relationship described above; Step 2: When it is necessary to lift the bridge connecting beam, the upper fully automatic mechanical screw lock at the top of the through-hole jack is locked, and then the lower fully automatic mechanical screw lock is opened. After that, the through-hole jack begins to lift with the upper fully automatic mechanical screw lock, thereby driving the bridge connecting beam to be lifted. Step 3: After the single lifting action of the through-hole jack is completed, the lower fully automatic mechanical screw lock begins to tighten. Then the through-hole jack retracts, and the upper fully automatic mechanical screw lock on the top of the through-hole jack automatically follows the downward rotation. Step 4: Repeat steps 2 and 3 until the bridge connecting beam is lifted into place, then begin replacing the supports; Step 5: Within one stroke of the cylinder extension of the through-hole jack, the fully automatic mechanical screw lock follows the upward rotation for one stroke to maintain the locked state, and the upward locking rate is greater than the cylinder extension rate; Step 6: After the support is replaced, the upper fully automatic mechanical auger lock is kept locked, the through-hole jack retracts its cylinder, and the upper fully automatic mechanical auger lock and the upper precision-rolled threaded steel bar II descend together, thus lowering the bridge connecting beam. After the through-hole jack retracts its cylinder, the lower fully automatic mechanical auger lock is locked. After locking, the upper fully automatic mechanical auger lock is opened, and then the through-hole jack begins to lift the upper fully automatic mechanical auger lock. After lifting is completed, the upper fully automatic mechanical auger lock locks the upper precision-rolled threaded steel bar II again to complete one descent stroke. Step 7: Repeat the operation of Step 6 until the bridge connecting beam is lowered into place.

[0020] (III) Beneficial Effects This invention provides a device and method for replacing bearings on the deck of an existing bridge. It offers the following advantages: 1. Structural stability: The opposing layout of the bridge and the connecting beams of the overpass, combined with the uniform distribution of steel supports and steel distribution beams, makes the overall structure more uniformly stressed, providing a stable foundation for jacking; the constant mechanism connects the steel distribution beams and the bridge through precision-rolled threaded steel and connecting sleeves, enhancing the reliability of the connection and avoiding relative displacement between the equipment and the bridge during jacking.

[0021] 2. In terms of adaptability and flexibility: The design of symmetrical distribution of steel supports and installation of steel distribution beams along the length of the bridge can adapt to bridges of different sizes and structures, improving the versatility of the equipment; the lower precision rolled threaded steel bars are installed by rebar anchoring, which does not require large-scale damage to the original bridge structure, taking into account both installation firmness and flexibility.

[0022] 3. In terms of monitoring accuracy: Displacement sensors are installed opposite each other at multiple ends of the bridge connecting beam, which can accurately monitor its stroke displacement from multiple dimensions and fully grasp the position changes; pressure sensors are installed on the side of the lower fully automatic mechanical screw lock, which can monitor the jacking pressure in real time, detect abnormalities in time, and provide data support for construction safety.

[0023] 4. In terms of construction efficiency: The overall lifting only requires one set of through-hole jacks, reducing equipment investment and time spent on coordinated operation, simplifying the process and improving efficiency; its 10-30cm cyclic lifting stroke length is moderate, which can not only ensure the lifting volume in a single operation, but also quickly complete the force transmission switching, making the lifting process more efficient.

[0024] 5. Safety and reliability: The lifting and switching processes are respectively transmitted through fully automatic mechanical screw locks at the top and bottom, with clear switching logic, which can ensure that the bridge connecting beam is always under stable stress and avoid the risk of stress loss; displacement and pressure sensors monitor data in real time, which can detect abnormalities in time and take measures, greatly improving construction safety.

[0025] 6. Energy conservation and environmental protection: Construction does not require the setting of new reaction foundations or large-scale excavation of existing pile caps, reducing resource consumption; at the same time, it avoids the generation of waste from destructive operations, meeting the requirements of energy conservation and environmental protection. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the longitudinal section structure of the existing bridge deck lifting system according to the present invention; Figure 2 This is a schematic diagram of the cross-sectional structure of the existing bridge deck lifting mechanism according to the present invention. Figure 3 For the present invention Figure 1 Detailed structural diagram; Figure 4 This is a schematic diagram of the bridge deck rebar anchoring structure of the present invention; Figure 5 This is a schematic diagram of the structure of the existing bridge deck lifting equipment of the present invention after installation; Figure 6 This is a structural schematic diagram of an existing bridge when its supports are lifted and replaced according to the present invention. Figure 7 This is a schematic diagram of the existing bridge during synchronous lowering and preparation for equipment removal according to the present invention. Figure 8 This is a schematic diagram of the first step in the working principle of the present invention; Figure 9 This is a schematic diagram of the second step of the working principle of the present invention; Figure 10 This is a schematic diagram of the third step of the working principle of the present invention; Figure 11 This is a schematic diagram of the fourth step of the working principle of the present invention; Figure 12 This is a schematic diagram of the fifth step of the working principle of the present invention; Figure 13 This is a schematic diagram of the sixth step of the working principle of the present invention; Figure 14 This is a schematic diagram of the seventh step of the working principle of the present invention.

[0027] In the diagram: 1-Bridge; 2-Bridge connecting beam; 3-Steel support; 4-Steel distribution beam; 5-Constant mechanism; 51-Nut; 52-Washer; 53-Upper fine-rolled threaded steel bar I; 54-Lower fine-rolled threaded steel bar I; 55-Fine-rolled threaded steel bar connecting sleeve I; 6-Lifting mechanism; 61-Upper fully automatic mechanical auger lock; 62-Lower fully automatic mechanical auger lock; 63-Through-core jack; 7-Lifting mechanism; 71-Upper fine-rolled threaded steel bar II; 72-Lower fine-rolled threaded steel bar II; 73-Fine-rolled threaded steel bar connecting sleeve II; 8-Sensing mechanism; 81-Displacement sensor; 82-Pressure sensor. Detailed Implementation

[0028] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0029] Please see Figure 1-14 This invention provides a technical solution for replacing bearings on the deck of an existing bridge: The system includes a bridge 1, a bridge connecting beam 2, steel supports 3, steel distribution beams 4, a constant mechanism 5, a jacking mechanism 6, a lifting mechanism 7, and a sensing mechanism 8. The bridge 1s are arranged opposite each other on the left and right sides. The bridge connecting beam 2 is positioned between the two opposite bridge 1s. The steel supports 3 are evenly distributed on the top of each bridge 1. The steel distribution beams 4 are positioned on the top of each steel support 3. The constant mechanism 5, the jacking mechanism 6, and the lifting mechanism 7 are all positioned on each steel distribution beam 4. The sensing mechanism 8 is positioned on the bridge connecting beam 2 and the jacking mechanism 6.

[0030] The constant mechanism 5 includes a nut 51, a washer 52, an upper fine-rolled threaded steel bar 53, a lower fine-rolled threaded steel bar 54, and a fine-rolled threaded steel bar connecting sleeve 55. The washer 52 is located at the top of each steel distribution beam 4 and at the end of the steel distribution beam 4 away from the bridge connecting beam 2 along its length. The nut 51 is located at the top of each washer 52. The upper fine-rolled threaded steel bar 53 passes through the nut 51, washer 52, and steel distribution beam 4 from top to bottom and extends downward. The lower fine-rolled threaded steel bar 54 is located inside the bridge 1 corresponding to the position of each upper fine-rolled threaded steel bar 53. The fine-rolled threaded steel bar connecting sleeve 55 is sleeved on the bottom of each set of upper fine-rolled threaded steel bars 53 and the top of each set of lower fine-rolled threaded steel bars 54.

[0031] In detail, the bridge connecting beam 2 has a trapezoidal structure, and the steel supports 3 are opposite and symmetrically distributed on the top of the two bridges 1 near the opposite ends along the width direction of the bridge 1. The steel distribution beam 4 has a cuboid structure and is installed on the top of each steel support 3 along the length direction of the bridge 1, with the steel supports 3 located in the center of each steel distribution beam 4.

[0032] Each lower fine-rolled threaded steel bar 54 is implanted into the interior of the bridge deck of bridge 1 by means of rebar anchoring, and the top of each lower fine-rolled threaded steel bar 54 abuts against the corresponding upper fine-rolled threaded steel bar 53.

[0033] The lifting mechanism 6 includes an upper fully automatic mechanical screw lock 61, a lower fully automatic mechanical screw lock 62, and a through-hole jack 63. The upper fully automatic mechanical screw lock 61 and the lower fully automatic mechanical screw lock 62 are arranged in an upper and lower structure on the top of each steel distribution beam 4 and are opposite to the position of the nut 51 on the steel distribution beam 4. The through-hole jack 63 is arranged between each set of upper fully automatic mechanical screw lock 61 and lower fully automatic mechanical screw lock 62.

[0034] The upper fully automatic mechanical screw lock 61 and the lower fully automatic mechanical screw lock 62 are distributed opposite each other on each through-hole jack 63 along the width direction of the bridge 1. The upper fully automatic mechanical screw lock 61, the lower fully automatic mechanical screw lock 62 and the through-hole jack 63 are integrally formed.

[0035] The lifting mechanism 7 includes an upper fine-rolled threaded steel bar 2 71, a lower fine-rolled threaded steel bar 2 72, and a fine-rolled threaded steel bar connecting sleeve 2 73. The upper fine-rolled threaded steel bar 2 71 passes through each set of upper fully automatic mechanical auger lock 61, through-hole jack 63, and lower fully automatic mechanical auger lock 62 from top to bottom and continues to pass through the steel distribution beam 4 and extend downward. The lower fine-rolled threaded steel bar 2 72 is set inside the bridge 1 corresponding to the position of each upper fine-rolled threaded steel bar 2 71. The fine-rolled threaded steel bar connecting sleeve 2 73 is sleeved on the bottom of each set of upper fine-rolled threaded steel bar 1 53 and the top of each set of lower fine-rolled threaded steel bar 1 54.

[0036] Each lower fine-rolled threaded steel bar 2 72 is implanted into the interior of the bridge deck of bridge 1 by means of rebar anchoring, and the top of each lower fine-rolled threaded steel bar 2 72 abuts against the corresponding upper fine-rolled threaded steel bar 2 71.

[0037] The sensing mechanism 8 includes a displacement sensor 81 (model: YWD-30) and a pressure sensor 82 (model: Burster8435-6001). The displacement sensors 81 are oppositely arranged at both ends of the width direction of the bridge connecting beam 2 and each pair is located at both ends of the length direction of the bridge connecting beam 2. The pressure sensors 82 are arranged at the side end of each lower fully automatic mechanical spiral lock 62.

[0038] Solution Analysis: 1. Structural stability Bridge 1 is set up on the left and right sides, and the bridge connecting beam 2 is located between the two bridges 1. Steel supports 3 are evenly distributed on the top of bridge 1, and steel distribution beam 4 is placed on top of steel supports 3. This layout makes the entire structure more evenly stressed in the horizontal and vertical directions, providing a stable foundation support for subsequent jacking operations and effectively avoiding structural damage caused by excessive local stress.

[0039] The constant mechanism 5 uses components such as precision-rolled threaded steel bars and connecting sleeves to firmly connect the steel distribution beam 4 to the bridge deck of bridge 1, which enhances the reliability of the connection between the equipment and bridge 1. During the jacking process, it can prevent relative displacement between the equipment and bridge 1 and ensure the stability of the jacking operation.

[0040] 2. Adaptability and flexibility The steel supports 3 are symmetrically distributed on the top of the bridge 1 near the opposite ends along the width direction. The steel distribution beam 4 is installed along the length of the bridge 1 and the steel supports 3 are located in the center of the steel distribution beam 4. This arrangement can be adapted to different sizes and structures of the bridge 1 and is suitable for the renovation of existing bridges of various specifications, thus improving the versatility of the equipment.

[0041] The fine-rolled threaded steel bars are embedded into the bridge deck of Bridge 1 using a rebar anchoring method. This connection method does not require large-scale damage to the original bridge structure, and the equipment can be installed without affecting the original function of the bridge. At the same time, it ensures the firmness of the connection and improves the flexibility of installation.

[0042] 3. Monitoring accuracy The displacement sensors 81 in the sensing mechanism 8 are oppositely arranged at both ends of the width direction and at both ends of the length direction of the bridge connecting beam 2. They can accurately monitor the travel displacement of the bridge connecting beam 2 from multiple dimensions, ensuring a comprehensive and accurate grasp of the positional changes of the bridge connecting beam 2 during lifting or lowering.

[0043] Pressure sensors 82 are installed on the side of each lower fully automatic mechanical screw lock 62, which can monitor pressure changes in real time during the jacking process, detect abnormal pressure in a timely manner, provide data support for the safe jacking process, and ensure construction safety.

[0044] Please see Figure 8-14 Based on the technical content of the above-mentioned equipment, this solution also includes a method for replacing bearings on the bridge deck of an existing bridge.

[0045] The present invention provides a method for replacing bearings on an existing bridge deck, as follows: Step 1: Please refer to Figure 8 The bridge deck lifting equipment of this scheme shall be installed to the initial operating state according to the positional relationship of claims 1-8; Step 2: Please refer to Figure 9 When it is necessary to lift the bridge connecting beam 2, the upper fully automatic mechanical screw lock 61 on the top of the through-hole jack 63 is locked, and then the lower fully automatic mechanical screw lock 62 is opened. After that, the through-hole jack 63 begins to lift with the upper fully automatic mechanical screw lock 61, thereby driving the bridge connecting beam 2 to be lifted. Step 3: Please refer to Figure 10After the single lifting action of the through-hole jack 63 is completed, the lower fully automatic mechanical screw lock 62 begins to tighten, and then the through-hole jack 63 retracts, and the upper fully automatic mechanical screw lock 61 on the top of the through-hole jack 63 automatically follows and rotates downward. Step 4: Please refer to Figure 11 Repeat steps 2 and 3 until the bridge connecting beam 2 is lifted into place, and then start replacing the supports; Step 5: Please refer to Figure 12 The 63-type through-hole jack extends the cylinder and, within one stroke, the fully automatic mechanical screw lock 61 follows the cylinder's upward rotation for one stroke to maintain the locked state, and the upward locking rate is greater than the cylinder extension rate. Step 6: Please refer to Figure 13 After the support is replaced, the upper fully automatic mechanical auger lock 61 remains locked, the through-hole jack 63 retracts its cylinder, and at the same time, the upper fully automatic mechanical auger lock 61 and the upper fine-rolled threaded steel bar 71 descend together, thus lowering the bridge connecting beam 2. After the through-hole jack 63 retracts its cylinder, the lower fully automatic mechanical auger lock 62 locks. After locking, the upper fully automatic mechanical auger lock 61 opens, and then the through-hole jack 63 begins to lift the upper fully automatic mechanical auger lock 61. After lifting, the upper fully automatic mechanical auger lock 61 locks the upper fine-rolled threaded steel bar 71 again to complete one descent stroke. Step 7: Please refer to Figure 14 Repeat step 6 until the bridge connecting beam 2 is lowered into place.

[0046] Solution Analysis: 1. Construction efficiency The entire lifting process only requires one set of through-hole jacks (63), which reduces the number of devices used, simplifies the operation process, lowers equipment investment costs, and also reduces the time loss that may be caused by the coordinated operation of multiple sets of devices, thus improving construction efficiency.

[0047] The 63-inch through-hole jack has a stroke of 10cm to 30cm, which is moderate. It can ensure that there is enough lifting volume for each lifting and can quickly complete the force transmission switch during the switching process, making the entire lifting and lowering process more efficient.

[0048] 2. Safety and reliability aspects The lifting process transmits force through the upper fully automatic mechanical screw lock 61, and the switching process transmits force through the lower fully automatic mechanical screw lock 62. The switching logic of this force transmission method is clear. During the lifting and switching process, the locking and unlocking operation of the screw lock can ensure that the bridge connecting beam 2 is always in a stable stress state, avoiding safety hazards such as stress loss.

[0049] Displacement sensor 81 monitors stroke displacement in real time, and pressure sensor 82 monitors pressure during the jacking process in real time. This provides real-time data for the jacking process. Once an abnormality in displacement or pressure is detected, timely measures can be taken to effectively avoid structural damage or safety accidents caused by abnormal conditions, thus greatly improving the safety of construction.

[0050] 3. Energy conservation and environmental protection There is no need to set up new reaction foundations or carry out large-scale excavation and other destructive activities on the original foundation, which reduces resource consumption and waste generation during construction and meets the requirements of energy conservation and environmental protection.

[0051] Working principle: The principle of this invention is a novel jacking method for lifting bridge 1 by installing steel supports 3 and through-hole jacks 63 on the bridge deck. Only one set of through-hole jacks 63 is needed for the overall lifting process. The through-hole jacks 63 are installed between the upper fully automatic mechanical auger lock 61 and the lower fully automatic mechanical auger lock 62. A steel distribution beam 4 is placed on top of the steel supports 3. The steel distribution beam 4 is connected by upper precision-rolled threaded steel bars 53 and 71 passing through the bottom and both sides of the lower fully automatic mechanical auger lock 62. During the lifting process, force is transmitted through the upper fully automatic mechanical auger lock 61, and during the switching process, force is transmitted through the lower fully automatic mechanical auger lock 62. The root of the upper precision-rolled threaded steel bar 53 is fixed to the lower precision-rolled threaded steel bar 54 through a precision-rolled threaded steel connecting sleeve 55. The root of the upper precision-rolled threaded steel bar 71 is fixed to the lower precision-rolled threaded steel bar 72 through a precision-rolled threaded steel connecting sleeve 73. A displacement sensor 81 is fixed to the side of the bridge connecting beam 2, and a pressure sensor 82 is fixed to the valve of the through-hole jacking jack 63.

[0052] During the lifting process of the bridge connecting beam 2, the through-hole jack 63 lifts the upper fully automatic mechanical auger lock 61, which in turn lifts the bridge connecting beam 2 via the upper precision-rolled threaded steel bar 71. After the through-hole jack 63 completes one stroke, the lower fully automatic mechanical auger lock 62 tightens, suspending the bridge connecting beam 2 on the steel distribution beam 4. After the through-hole jack 63 retracts, the upper fully automatic mechanical auger lock 61 automatically tightens, while the lower fully automatic mechanical auger lock 62 loosens to begin the next lifting process. The displacement sensor 81 monitors the stroke displacement in real time, and the pressure sensor 82 monitors the pressure during the lifting process in real time, providing real-time data for the lifting process and determining whether there are any abnormalities in the lifting process.

[0053] The cyclic lifting stroke of the through-hole jack is 10cm to 30cm.

[0054] Technical effects of implementing this solution: This solution is designed from multiple dimensions, including structural stability, adaptability, and monitoring accuracy. It provides a stable, universal, safe, and controllable equipment foundation for the replacement of bearings on existing bridge decks. It can adapt to different bridge structures and ensure that the jacking process is stable and can be monitored in real time.

[0055] This solution achieves high efficiency, safety, energy conservation, and environmental protection in the construction of bridge deck lifting and bearing replacement through efficient equipment utilization, clear force transmission switching logic, and real-time monitoring. It can reduce adverse impacts on the environment and traffic while ensuring construction quality and safety.

[0056] The present invention comprises: 1-bridge; 2-bridge connecting beam; 3-steel support; 4-steel distribution beam; 5-constant mechanism; 51-nut; 52-washer; 53-upper fine-rolled threaded steel bar one; 54-lower fine-rolled threaded steel bar one; 55-fine-rolled threaded steel bar connecting sleeve one; 6-lifting mechanism; 61-upper fully automatic mechanical auger lock; 62-lower fully automatic mechanical auger lock; 63-through jack; 7-lifting mechanism; 71-upper fine-rolled threaded steel bar two; 72-lower fine-rolled threaded steel bar two; 73-fine-rolled threaded steel bar connecting sleeve two; 8-sensing mechanism; 8 1-Displacement sensor; 82-Pressure sensor. These components are all general standard parts or components known to those skilled in the art. Their structure and principles can be learned by those skilled in the art through technical manuals or conventional experimental methods. The problem solved by this invention is that the existing traditional methods of replacing bearings in existing bridges—steel support jacking, corbel jacking, and direct pier top jacking—all have limitations in applicability, and some methods also suffer from complex construction, long construction periods, and large project volumes, making it difficult to meet the bearing replacement needs of all existing bridge renovations. This invention designs equipment from multiple dimensions to provide a stable, universal, safe, and controllable foundation for lifting and replacing bearings on existing bridge decks, adapting to different bridges and ensuring real-time monitoring of jacking; at the same time, with efficient equipment utilization, clear force transmission logic, and real-time monitoring, it achieves efficient, safe, energy-saving, and environmentally friendly construction, reducing adverse impacts on the environment and traffic.

[0057] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered illustrative and non-limiting in all respects. The scope of the invention is defined by the appended claims rather than the foregoing description, and thus all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0058] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. An apparatus for lifting and replacing the bearings of an existing bridge deck, characterized by: The utility model provides a bridge lifting device, including bridge (1), cross bridge connecting beam (2), steel support (3), steel distribution beam (4), constant mechanism (5), jacking mechanism (6), lifting mechanism (7), sensing mechanism (8), bridge (1) left and right opposite settings, cross bridge connecting beam (2) setting between two opposite bridges (1), steel support (3) evenly setting at the top of bridge (1), steel distribution beam (4) setting at the top of every steel support (3), constant mechanism (5), jacking mechanism (6) and lifting mechanism (7) all setting on every steel distribution beam (4), sensing mechanism (8) setting on cross bridge connecting beam (2) and jacking mechanism (6), Constant mechanism (5) includes nut (51), gasket (52), upper finish rolling threaded steel one (53), lower finish rolling threaded steel one (54) and finish rolling threaded steel connecting sleeve one (55), gasket (52) setting at the top of every steel distribution beam (4) and located the length direction of steel distribution beam (4) away from the one end of cross bridge connecting beam (2), nut (51) setting at the top of every gasket (52), upper finish rolling threaded steel one (53) from up to down penetrates nut (51), gasket (52) and steel distribution beam (4) and extends downward, lower finish rolling threaded steel one (54) setting in the inside of bridge (1) corresponding the position of every upper finish rolling threaded steel one (53), finish rolling threaded steel connecting sleeve one (55) is sleeved in the bottom of every group upper finish rolling threaded steel one (53) and the top of lower finish rolling threaded steel one (54).

2. The equipment for replacing supports of a bridge deck of an existing bridge according to claim 1, characterized in that: Cross bridge connecting beam (2) is in the form of a ladder, steel support (3) is symmetrically distributed along the width direction of bridge (1) at the position near the opposite ends on the top of left and right bridge (1), steel distribution beam (4) is in the form of a cuboid and is installed along the length direction of bridge (1) on the top of every steel support (3), and the steel support (3) is located at the central position of every steel distribution beam (4).

3. The apparatus for replacing bearings of a bridge deck of a bridge in service according to claim 2, wherein: Every lower finish rolling threaded steel one (54) is implanted into the inside of the bridge deck of bridge (1) by means of anchoring, and the top of every lower finish rolling threaded steel one (54) abuts against the corresponding upper finish rolling threaded steel one (53).

4. The apparatus for replacing bearings of a bridge deck of a bridge in service according to claim 3, wherein: The jacking mechanism (6) includes upper full-automatic mechanical screw lock (61), lower full-automatic mechanical screw lock (62) and through-hole jack (63), the upper full-automatic mechanical screw lock (61) and the lower full-automatic mechanical screw lock (62) are arranged in an up-down structure on the top of every steel distribution beam (4) and are opposite to the position of the nut (51) on the currently located steel distribution beam (4), and the through-hole jack (63) is arranged between every group of upper full-automatic mechanical screw lock (61) and lower full-automatic mechanical screw lock (62).

5. The apparatus for replacing bearings of a bridge deck of a bridge in service according to claim 4, wherein: The upper full-automatic mechanical spiral lock (61) and the lower full-automatic mechanical spiral lock (62) are oppositely distributed along the width direction of the bridge (1) on each of the through jacks (63), and the upper full-automatic mechanical spiral lock (61), the lower full-automatic mechanical spiral lock (62) and the through jack (63) are integrally formed.

6. The apparatus for replacing bearings of a bridge deck of a bridge in service according to claim 5, wherein: The lifting mechanism (7) comprises upper fine rolled threaded steel No. 2 (71), lower fine rolled threaded steel No. 2 (72) and fine rolled threaded steel connecting sleeve No. 2 (73), the upper fine rolled threaded steel No. 2 (71) sequentially passes through each group of the upper full-automatic mechanical spiral lock (61), the through jack (63) and the lower full-automatic mechanical spiral lock (62) from top to bottom and continues to extend downward through the steel distribution beam (4), the lower fine rolled threaded steel No. 2 (72) is arranged inside the bridge (1) corresponding to the position of each of the upper fine rolled threaded steel No. 2 (71), and the fine rolled threaded steel connecting sleeve No. 2 (73) is sleeved at the bottom of each group of the upper fine rolled threaded steel No. 1 (53) and the top of the lower fine rolled threaded steel No. 1 (54).

7. The apparatus for replacing bearings of a bridge deck of a bridge in service according to claim 6, wherein: Each of the lower fine rolled threaded steel No. 2 (72) is implanted into the inside of the bridge deck of the bridge (1) in the form of anchoring, and the top of each of the lower fine rolled threaded steel No. 2 (72) abuts against the corresponding upper fine rolled threaded steel No. 2 (71).

8. The apparatus for replacing bearings of a bridge deck of an existing bridge according to claim 7, wherein: The sensing mechanism (8) comprises displacement sensors (81) and pressure sensors (82), the displacement sensors (81) are oppositely arranged at the two ends of the width direction of the bridge connecting beam (2) and each pair is located at the two ends of the length direction of the bridge connecting beam (2), and the pressure sensors (82) are arranged at the side ends of each of the lower full-automatic mechanical spiral lock (62).

9. A method for replacing bearings in a bridge deck lifting of an existing bridge according to claims 1-8, characterized in that: The method is as follows: Step 1: install the bridge deck lifting equipment of the present scheme to the initial operating state according to the positional relationship described above; Step 2: when the bridge connecting beam (2) needs to be lifted, the upper full-automatic mechanical spiral lock (61) at the top of the through jack (63) is locked, then the lower full-automatic mechanical spiral lock (62) is opened, and then the through jack (63) starts to lift with the upper full-automatic mechanical spiral lock (61), thereby driving the bridge connecting beam (2) to lift; Step 3: after the single lifting action of the through jack (63) is completed, the lower full-automatic mechanical spiral lock (62) starts to lock, and then the through jack (63) retracts, and the upper full-automatic mechanical spiral lock (61) at the top of the through jack (63) automatically follows the downward rotation; Step 4: repeat the operations of steps 2 and 3 until the bridge connecting beam (2) is lifted into position, and then start to replace the support; Step 5: the upper full-automatic mechanical spiral lock (61) follows the upward rotation for one stroke in real time within one stroke of the extension of the through jack (63) to maintain the locked state, and the upward locking rate is greater than the extension rate. Step 6: After the replacement of the support, the upper full-automatic mechanical screw lock (61) remains in the locked state, the through-center jack (63) retracts the cylinder, and at the same time, the upper full-automatic mechanical screw lock (61) and the upper finished rolled threaded steel No. 2 (71) are lowered, thereby bringing down the cross-bridge connecting beam (2), and after the through-center jack (63) retracts the cylinder, the lower full-automatic mechanical screw lock (62) is locked, and after locking, the upper full-automatic mechanical screw lock (61) is opened, and then the through-center jack (63) starts to lift with the upper full-automatic mechanical screw lock (61), and after lifting is completed, the upper full-automatic mechanical screw lock (61) again locks the upper finished rolled threaded steel No. 2 (71) to complete one lowering stroke; Step 7: Repeat the operation of Step 6 until the cross-bridge connecting beam (2) is lowered into place.

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