Steel beam pushing lifting type operation device and using method thereof

Abstract

The invention provides a steel beam pushing lifting type operation device and a using method thereof. The steel beam pushing lifting type operation device comprises a plurality of supporting frames. The supporting frame is arranged at the tail end of an entering section of a steel box girder construction route; a lifting mechanism is arranged on the support frame; the lifting mechanism is provided with a platform; a plurality of pushing machines are arranged at the top of the platform; the lifting mechanism comprises a fixing base fixed to the top of the supporting frame. A first oil cylinder is arranged in the fixed seat; a connecting plate is arranged at the output end of the first oil cylinder and connected with the platform. A plurality of guide columns are arranged at the bottom of the connecting plate and extend into the fixing base in a sliding mode. The multiple platforms are arranged and reasonably divided, continuous transportation, butt joint and pushing operation of the steel box girders is achieved, the waiting time between procedures is shortened, and the construction efficiency is greatly improved; compared with an existing hoisting or bridge girder erection machine construction mode, the method has the advantages that the influence on existing traffic is smaller, fewer devices are used, the cost is saved, and the communication keeping effect is better.

Description

Technical Field

[0001] This invention relates to the field of steel box girder jacking construction technology, specifically to a steel girder jacking lifting operation device and its usage method. Background Technology

[0002] In bridge construction, the incremental launching method for steel box girders is widely used due to its minimal impact on the surrounding environment and high construction efficiency. However, in actual construction, especially when the entry section of the construction route is curved, the incremental launching of steel box girders faces numerous challenges.

[0003] The current method of transporting the beams often involves hoisting or using a beam transport vehicle, followed by the use of a bridge erecting machine. In actual construction, this method is not only inconvenient to operate, but also poses certain safety hazards. The transport of steel box girders by hoisting and bridge erecting machines is unstable and prone to swaying, which can also affect the use of existing traffic.

[0004] In the practice of existing expressway reconstruction and expansion projects, the traditional method of hoisting beams is used. Due to limited working space and the impact on traffic flow below, the average effective beam entry time is less than 4 hours per day. In addition, large hoisting equipment and complex traffic diversion measures are required. The overall cost of each beam entry is high and the efficiency is low, which has become a key bottleneck restricting the entire construction period.

[0005] When using a beam transport vehicle to deliver the beams, the construction and beam delivery conditions change in real time, resulting in inconsistent beam transport and jacking rates. If the beam transport is slow or the jacking is fast, it is necessary to wait for the steel box girder to be delivered before jacking can begin again. Conversely, if the beam transport is fast or the jacking is slow, the delivered steel box girder needs to wait for the jacking to be completed before it can be placed and connected. This not only makes process coordination inconvenient and affects construction efficiency but also poses safety hazards. Summary of the Invention

[0006] The main objective of this invention is to provide a steel beam jacking and lifting operation device and its usage method, which solves the problems of inconvenient operation and low efficiency in the beam advancing process during existing jacking construction.

[0007] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is as follows: A steel beam jacking and lifting operation device includes several support frames; the support frames are set at the end of the entry section of the steel box girder construction route; The support frame is equipped with a lifting mechanism; The lifting mechanism is equipped with several platforms; The platform is equipped with a drive mechanism for lifting and moving the steel box girder.

[0008] In a preferred embodiment, the lifting mechanism includes a fixed base fixed to the top of the support frame; The first hydraulic cylinder is installed inside the fixed base; The output end of the first hydraulic cylinder is equipped with a connecting plate, which is connected to the platform. The bottom of the connecting plate is provided with several guide posts, which slide into the interior of the fixed base.

[0009] In the preferred embodiment, the platform includes an entry platform for receiving the steel box girder and a jacking platform for docking and jacking. Approaching the entry section of the platform; A lifting mechanism is installed at the bottom of the platform; a fixed column is installed at the bottom of the jacking platform, and the fixed column is fixed to the top of the support frame. Both sides of the entry platform and the jacking platform are equipped with protruding plates; The drive mechanism is located on the top of the convex plate; The driving mechanism is a pusher.

[0010] In the preferred embodiment, the entry platform includes a first entry platform and a second entry platform, and the jacking platform includes a first jacking platform and a second jacking platform; The first entry platform is near the entry section.

[0011] In a preferred embodiment, the jacking platform also includes a secondary pier fixed to the ground; the top of the secondary pier is provided with a support seat, and the top of the support seat is provided with a flat plate; The drive mechanism is located on the top of the plate, and the top of the plate is equipped with support piles; The top surface of the support pile is adapted to the top surface of the bridge pier.

[0012] In a preferred embodiment, a docking locking mechanism is provided between adjacent platforms; The docking and locking mechanism includes several stabilizing holes at one end of the platform; The other end of the platform is equipped with several second hydraulic cylinders; the output end of the second hydraulic cylinders is equipped with a stabilizing column; The stabilizing column is compatible with the stabilizing hole.

[0013] In a preferred embodiment, the top of the platform is provided with a retractable connection mechanism for connecting the platform with adjacent platforms and with the existing bridge structure. The connecting mechanism includes a movable plate that is slidably connected to the top of the platform; One end of the movable plate has a concave arc surface, and an adapter plate is provided inside the concave arc surface. One side of the adapter plate is a concave arc surface that matches the convex arc surface, and the other side is a flat surface; Both ends of the adapter plate are fixed with fixing plates; The fixed plate is equipped with a guide rod, which slides into the interior of the movable plate. The guide rod is an arc-shaped rod, and the rotation axis of the guide rod and the adapter plate coincides with the axis of the concave surface of the arc. The top of the platform has a movable slot; The bottom of the movable plate is equipped with a movable block, which is slidably connected to the inside of the movable groove; A third hydraulic cylinder is installed inside the movable slot, and the output end of the third hydraulic cylinder is connected to the movable block.

[0014] A method for using a steel beam jacking and lifting operation device includes the following steps: S1. Complete the erection of steel box girders for the section entering the designed route; Complete the erection of the fixed frame for the jacking route and the installation of the jacking machine; S2. An entry beam device is installed at the end of the entry section; S3. The beam transport vehicle transports the beam along the entry section to the beam entry device; S4. The transported steel box girder is connected to the preceding steel box girder at the girder entry device; The beam transport vehicle drove away to prepare for transporting the next section of steel box girder; S5. Repeat S3-S4 until all steel box girders are installed. S6. Construction completed, beam entry device removed; In S3-S5, the jacking operation continued.

[0015] In the preferred embodiment, the beam feeding device includes a lifting platform and a fixed platform, with a transfer platform between the lifting platform and the fixed platform; a jacking machine is installed on the top of the lifting platform, the fixed platform, and the transfer platform; the lifting platform is divided into multiple independently liftable parts. S3 includes: S31, The lifting platform rises; S32. The beam transport vehicle moves the beam onto the lifting platform; S33. The lifting platform is lowered until it is level with the fixed platform; S34. The beam transport vehicle moves the beam towards the fixed platform until the end of the transported steel box girder is close to the preceding steel box girder. S35. The jacking machine on the fixed platform lifts the steel box girder, and the beam transport vehicle moves the lifting platform. In S4, the end connection of the steel box girder is located above the fixed platform. The jacking machine on the fixed platform works synchronously with the jacking machine on the fixed frame to maintain the synchronicity of the movement of the steel box girder. During the synchronous jacking process, the connection between the newly transported steel box girder and the existing steel box girder is completed.

[0016] In the preferred embodiment, the bottom of the transfer platform is supported by secondary piers; The secondary piers are made of the same materials as the main piers. The top of the secondary piers is equipped with a support base, and the transfer platform is set on the support base. Support piles are installed on the transfer platform. S6 includes: S61, the penultimate steel box girder was transported to the fixed platform by the girder transport vehicle; S62. One end of the penultimate steel box girder is connected to the existing steel box girder, so that the end of the penultimate steel box girder closest to the entry section rests on the support piles; S63, The beam transport vehicle transports the last section of the steel box girder to the lifting platform; S64. The lifting platform moves down, allowing the steel box girder to move between the first and second-to-last steel box girder sections; S65. Complete the connection at both ends of the last section of the steel box girder; S66. Remove the beam entry device, and retain the secondary piers, support seats, transfer platform and support piles.

[0017] This invention provides a steel beam jacking and lifting operation device and its usage method. By adopting the above solution, the following beneficial effects are achieved: 1. By setting up multiple platforms for collaborative construction, the continuous transportation, docking, and jacking processes of steel box girders were decoupled and operated in parallel, eliminating waiting time between processes and improving the efficiency of girder entry.

[0018] 2. The platforms are connected by stabilizing columns and holes, as well as connecting mechanisms, ensuring a tight connection between the platforms. This provides a smooth transition interface for the beam transport vehicle, reduces safety risks during beam transfer, and minimizes special requirements for the beam transport vehicle.

[0019] 3. The lifting mechanism makes the loading and unloading of steel box girders more stable, avoiding the risk of the steel box girders falling during the transfer process.

[0020] 4. By adjusting the height of the lifting platform and the angle of the connecting mechanism, the beam-entry device can adapt to the construction needs of steel box girders with different entry angles and different heights, thus possessing strong versatility and adaptability.

[0021] 5. Compared with existing hoisting or bridge erecting machine construction methods, the method of this application has less impact on existing traffic, requires less equipment, not only saves costs, but also achieves better traffic flow.

[0022] 6. The modular design allows for quick installation and dismantling of the device, significantly improving the equipment's turnover rate. It is particularly suitable for multi-span, long-distance jacking construction projects, thus reducing the cost per project. Attached Figure Description

[0023] The present invention will be further described below with reference to the accompanying drawings and embodiments: Figure 1 This is a schematic diagram of an embodiment of the present invention; Figure 2 This is a side view schematic diagram of an embodiment of the present invention; Figure 3 This is a schematic diagram of the structure of the present invention; Figure 4 This is a top view of the structure of the present invention; Figure 5 This is an enlarged structural schematic diagram of the lifting mechanism described in this invention; Figure 6 This is a cross-sectional view of the connecting mechanism described in this invention; Figure 7 This is a schematic diagram of the structure of an embodiment of the first pushing platform of the present invention; Figure 8 This is a structural diagram of the final stage of construction of this invention.

[0024] In the picture: Support frame 1, steel box girder 101, fixed frame 102, entry section 103, pier 104, lifting mechanism 2, fixed seat 201, first hydraulic cylinder 202, connecting plate 203, guide column 204, platform 3, first entry platform 301, second entry platform 302, first jacking platform 303, secondary pier 331, support seat 332, flat plate 333, second jacking platform 304, protruding plate 305, stabilizing hole 306, second hydraulic cylinder 307, stabilizing column 308, fixed column 309, jacking machine 4, connecting mechanism 5, movable plate 501, adapter plate 502, fixed plate 503, guide rod 504, movable groove 505, third hydraulic cylinder 506, movable block 507, support pile 6. Detailed Implementation

[0025] Example 1: like Figure 1 , 2 As shown in Figures 3, 4, 5, 6, and 7, a steel beam jacking and lifting operation device includes several support frames 1. The support frames 1 are welded from Q345B steel, have a rectangular cross-section, and their height is set according to construction requirements, preferably 3-10m. The support frames 1 are installed at the end of the entry section 103 of the steel box girder construction route and are fixed to the ground by embedded parts to ensure their stability.

[0026] The entry section 103 referred to in this application is the entry section of the steel box girder construction route. For example, in the case of an arc-shaped entry section for reconstruction and expansion construction, in order to facilitate jacking, this application first erects the steel box girder in the arc-shaped entry section. After the erection is completed, jacking construction begins at the end of the entry section. The jacking section is relatively straight compared to the arc-shaped entry section, without large-angle bends, thus eliminating the need for jacking in the arc-shaped entry section and facilitating the overall jacking construction. On the jacking line, existing piers 104 for steel box girders are set up using existing technology, and a fixed frame 102 for jacking is set up. A drive mechanism for lifting and moving the steel box girder is placed on the fixed frame 102, preferably a jacking machine 4. The jacking machine 4 can be a commonly used jacking machine.

[0027] The support frame 1 is equipped with a lifting mechanism 2. Specifically, the lifting mechanism 2 includes a fixed seat 201 fixed to the top of the support frame 1. The fixed seat 201 is equipped with reinforcing ribs to improve the load-bearing capacity.

[0028] The fixed base 201 is equipped with a first hydraulic cylinder 202. The first hydraulic cylinder 202 is a large-tonnage hydraulic cylinder, and its cylinder diameter is determined according to the load requirements. It is preferably an HSG series engineering hydraulic cylinder.

[0029] The output end of the first oil cylinder 202 is provided with a connecting plate 203. The connecting plate 203 is a thick steel plate and is fixedly connected to the piston rod of the first oil cylinder 202 by bolts. The connecting plate 203 is also connected to the platform 3.

[0030] The bottom of the connecting plate 203 is provided with several guide posts 204. The guide posts 204 are cylindrical and slide to the interior of the fixed seat 201. A guide sleeve is provided between the guide posts 204 and the fixed seat 201 to ensure the stability of the platform 3 when it is raised or lowered.

[0031] The lifting mechanism 2 is equipped with a platform 3, which is made of welded steel profiles and has a thick steel plate panel with anti-slip patterns on the surface.

[0032] In a further preferred embodiment, the number of platforms 3 is preferably four, namely a first entry platform 301, a second entry platform 302, a first jacking platform 303, and a second jacking platform 304. The first entry platform 301 is located near the entry section 103 and is used to receive the steel box girder transported from the entry section 103. Both sides of the first entry platform 301, the second entry platform 302, the first jacking platform 303, and the second jacking platform 304 are provided with protruding plates 305, which are welded and fixed to the platform 3. A jacking machine 4 is located on top of the protruding plate 305. The jacking machine 4 is a large-tonnage through-type jacking machine used to move the steel box girder.

[0033] In operation, the steel box girder 101 being pushed is transported from the entry section 103 to above the first entry platform 301 and the second entry platform 302 by a girder transport vehicle. Then, the first hydraulic cylinder 202 retracts, causing the first entry platform 301 and the second entry platform 302 to descend to the sides of the first jacking platform 303 and the second jacking platform 304. The girder transport vehicle then transports the steel box girder 101 to above the first jacking platform 303 and the second jacking platform 304 until it is close to the previously installed steel box girder 101. Then, the jacking machine 4 lifts the steel box girder 101, and the girder transport vehicle returns to above the first jacking platform 303. The first hydraulic cylinder 202 of the first jacking platform 303 extends, lifting the first jacking platform 303 until it is flush with the installed steel box girder in the entry section 103. Finally, the girder transport vehicle can return to its transport position to prepare for the transport of the next steel box girder 101. During the return process of the girder transport vehicle, the newly transported steel box girder 101 is connected, and then the jacking construction is carried out by the jacking machine 4.

[0034] Preferably, the jacking machine 4 works in conjunction with the newly delivered steel box girder 101 and the existing steel box girder 101 to jack up the newly delivered steel box girder 101 and the existing steel box girder 101. During this process, the newly delivered steel box girder 101 and the existing steel box girder 101 are connected synchronously to increase the jacking efficiency.

[0035] When there is no steel box girder 101 obstructing the second entry platform 302, the first hydraulic cylinder 202 of the second entry platform 302 extends to raise the second entry platform 302 to be level with the first entry platform 301, waiting for the new steel box girder 101 to be transported in.

[0036] With the beam-entry device of this application, the steel box girder 101 after jacking does not need to wait for a new steel box girder 101 to be transported in after jacking, and the steel box girder 101 does not need to wait for the previous steel box girder 101 to be jacked in in order to reserve a position after it is transported in, thereby ensuring the efficiency of jacking construction.

[0037] In one embodiment, only the bottom of the first entry platform 301 and the second entry platform 302 are equipped with lifting mechanisms 2, and only this section is raised and lowered when the steel box girder 101 is transported in. The bottom of the first jacking platform 303 and the second jacking platform 304 are equipped with fixed columns 309. The fixed columns 309 are cylindrical steel columns that are welded and fixed to the platform 3. The fixed columns 309 are also fixed to the top of the support frame 1 to ensure that the height of the platform 3 is fixed. The first jacking platform 303 and the second jacking platform 304 are only used for jacking construction and the entry of the beam transport vehicle.

[0038] In another embodiment, only the bottom of the first entry platform 301 and the second entry platform 302 are provided with lifting mechanisms 2; the bottom of the second jacking platform 304 is provided with a fixed column 309, which is fixed to the top of the support frame 1; the first jacking platform 303 includes a secondary pier 331 fixed to the ground, which is made of the same material as the pier 104, and is made of reinforced concrete, and its cross-sectional dimensions are determined according to the load-bearing calculation.

[0039] The top of the secondary pier 331 is equipped with a support seat 332, which is a high-strength concrete structure and is connected to the secondary pier 331 through embedded parts. A flat plate 333, also made of high-strength concrete, is located on top of the support seat 332 and is fixed to the support seat 332, preferably integrally formed. The flat plate 333 and support seat 332 can also be replaced with steel structural materials commonly used in existing cap beams. A jacking machine 4 is installed on top of the flat plate 333, which is equipped with a support pile 6, a high-strength concrete pile, fixed to the flat plate 333. The top surface of the support pile 6 is adapted to the top surface of the pier 104, ensuring a smooth transition of the steel box girder onto the pier 104 during the jacking process.

[0040] After the jacking construction is completed, the beam-entry device is removed, while the secondary pier 331, support seat 332, flat plate 333, and support pile 6 are retained to cooperate with the pier 104 to support the steel box girder 101.

[0041] Platform 3 has several stabilizing holes 306 at one end, and the stabilizing holes 306 are circular holes. At the other end of platform 3, several second hydraulic cylinders 307 are installed inside. The second hydraulic cylinders 307 are small hydraulic cylinders, preferably CG25 series hydraulic cylinders, and are fixed inside platform 3 by bolts. The output end of the second hydraulic cylinders 307 has a stabilizing column 308, which is cylindrical and fits the stabilizing holes 306. The end of the stabilizing column 308 near the stabilizing hole 306 has a conical surface, facilitating insertion of the stabilizing column 308 into the stabilizing hole 306 and enhancing the connection stability between adjacent platforms 3.

[0042] When in use, the second hydraulic cylinder 307 is activated to move the stabilizing column 308. The stabilizing column 308 extends into the stabilizing hole 306 of another platform 3, thus limiting the two adjacent platforms 3 to be on the same plane and ensuring stability during use. When the platform 3 needs to be raised or lowered, the second hydraulic cylinder 307 drives the stabilizing column 308 to retract.

[0043] The top of platform 3 is provided with a connecting mechanism 5, which is used to connect platform 3 with adjacent platforms 3 and to connect platform 3 with the existing bridge structure.

[0044] Specifically, the connecting mechanism 5 includes a movable plate 501 slidably connected to the top of the platform 3, and the movable plate 501 is made of steel plate. One end of the movable plate 501 is provided with an arc concave surface, and an adapter plate 502 is provided in the arc concave surface. One side of the adapter plate 502 is an arc convex surface that matches the arc concave surface, and the other side is a flat surface. The adapter plate 502 is made of wear-resistant steel plate.

[0045] Both ends of the adapter plate 502 are fixed with fixing plates 503, which are welded to the adapter plate 502. The fixing plate 503 is provided with a guide rod 504, which is an arc-shaped rod made of alloy structural steel. The guide rod 504 slides into the interior of the movable plate 501, and the rotation axis of the guide rod 504 and the adapter plate 502 coincides with the axis of the concave surface of the arc, so that the adapter plate 502 can rotate around this axis to adapt to connection requirements at different angles.

[0046] The top of platform 3 is provided with a movable groove 505, which is a rectangular groove. The bottom of movable plate 501 is provided with a movable block 507, which is adapted to the movable groove 505 and slidably connected inside the movable groove 505. A third hydraulic cylinder 506 is provided inside the movable groove 505. The third hydraulic cylinder 506 is preferably a CG25 series hydraulic cylinder. The cylinder body of the third hydraulic cylinder 506 is fixed inside the movable groove 505 by bolts, and the output end is connected to the movable block 507 to drive the movable plate 501 to slide along the movable groove 505.

[0047] After the two adjacent platforms 3 are at the same height, the third hydraulic cylinder 506 pushes the movable block 507 to move the movable plate 501 closer to the adapter plate 502 on the other platform 3, until it touches the adapter plate 502. During the contact process, the adapter plate 502 will rotate until the edge of the adapter plate 502 coincides with the edge of the movable plate 501, and then the third hydraulic cylinder 506 stops. At this point, the connection between the two platforms 3 is completed, facilitating the movement of the beam transport vehicle. The third hydraulic cylinder 506 is retracted during the lifting and lowering of the platform 3.

[0048] exist Figure 3 and Figure 4 The connection mechanism 5 is only configured in one direction. In actual use, the adapter plate 502 can be positioned on the left or right side as needed. Figure 3 and Figure 4 If the adapter plate 502 is located on the left side, it can connect with the edge of the entry section 103 through the adapter plate 502 to ensure the smooth entry of the beam transport vehicle.

[0049] like Figure 2 As shown, the steel box girder jacking construction method of this application can be carried out on existing traffic, which is safer and has less impact on existing traffic compared with the existing hoisting method and bridge erection machine erection method.

[0050] Example 2: like Figure 1 and 8 As shown, a method of using a steel beam jacking and lifting working device includes the following steps: S1. Erect the steel box girder 101 of the steel box girder construction route entry section 103 according to the design requirements, and ensure that the curvature and elevation of the entry section 103 meet the design standards; at the same time, erect the fixed frame 102 of the jacking route. The spacing and height of the fixed frame 102 are determined according to the installation requirements of the jacking machine 4, and the jacking machine is installed on the fixed frame 102.

[0051] S2. At the end of the entry section 103, the beam-entry device is erected according to the design position. The support frame 1 is fixed to the ground by embedded parts. The lifting mechanism 2, platform 3, fixed column 309 and other components are installed to ensure the accurate positional relationship between each platform 3. For the first jacking platform 303 with a secondary pier 331, the secondary pier 331, support seat 332, plate 333 and support pile 6 need to be poured, cured and connected in advance using the existing pier construction process.

[0052] S3. The girder transport vehicle transports the steel box girder 101 to the girder feeding device along the entry section 103. Specifically: S31. Control the lifting mechanism 2 at the bottom of the first entry platform 301 and the second entry platform 302 to raise the lifting platform (first entry platform 301 and second entry platform 302) to be flush with the bearing surface of the beam transport vehicle. S32. The beam transport vehicle slowly moves the beam onto the lifting platform, with the steel box girder 101 centered on platform 3. S33, Control the lifting mechanism 2 to lower the lifting platform to be flush with the fixed platform (first jacking platform 303 and second jacking platform 304); S34. The beam transport vehicle moves the beam towards the fixed platform until the end of the transported steel box girder is close to the preceding steel box girder. S35. Start the jacking machine 4 on the fixed platform to lift the steel box girder 101 to a certain height, so that the girder transport vehicle can drive out from the bottom of the steel box girder and move to the lifting platform.

[0053] S4. Connect the newly delivered steel box girder 101 to the existing steel box girder 101 at the girder entry device: The end connection of the steel box girder is located above the fixed platform. The jacking machine 4 on the fixed platform works synchronously with the jacking machine 4 on the fixed frame 102. By precisely controlling the jacking force and jacking speed, the synchronicity of the movement of the steel box girder is maintained. Preferably, during the synchronous jacking process, the connection between the newly transported steel box girder and the existing steel box girder is completed by welding or bolting.

[0054] S5. Repeat steps S3-S4. During this process, all the jacking machines 4 with steel box girders 101 on top work synchronously. The steel box girders 101 move along the jacking route until the jacking construction of all steel box girders is completed.

[0055] During the process of transporting the steel box girder by the beam transport vehicle, the jacking machines above the steel box girder 101 do not work synchronously until the beam transport vehicle has transported the steel box girder to the position. Then the jacking machines below the newly arrived steel box girder 101 work synchronously, and the beam transport vehicle drives away when the steel box girder 101 is lifted.

[0056] S6. After construction is completed, remove the beam entry device: The dismantling process for the beam-entry device with auxiliary pier 331 is as follows: S61, the penultimate steel box girder was transported to the fixed platform by the girder transport vehicle; S62. One end of the penultimate steel box girder is connected to the existing steel box girder, so that the end of the penultimate steel box girder closest to the entry section 103 rests on the support pile 6 to ensure the stability of the steel box girder; S63, The beam transport vehicle transports the last section of the steel box girder to the lifting platform; S64. Control the lifting platform to move down so that the last section of steel box girder can be smoothly moved between the entry section 103 and the penultimate section of steel box girder; S65. Complete the connection at both ends of the last section of the steel box girder; S66. Remove detachable components of the beam-entry device, such as the lifting mechanism 2 and the connecting mechanism 5 on the platform 3. For the secondary piers 331, support seats 332, transfer platforms, and support piles 6, these can be retained as piers due to their close integration with the bridge structure. Whether to retain them can be determined according to design requirements.

[0057] The above-mentioned construction method is mainly used for the jacking construction of steel box girders, but it is not limited to the jacking construction of steel box girders. It can also be used for the jacking construction of other similar bridges, so it cannot be interpreted as a limitation on this application.

[0058] The above embodiments are merely preferred technical solutions of the present invention and should not be considered as limitations on the present invention. The scope of protection of the present invention should be limited to the technical solutions described in the claims, including equivalent substitutions of the technical features described in the claims. That is, equivalent substitutions and improvements within this scope are also within the scope of protection of the present invention.

Claims

1. A steel beam jacking and lifting working device, characterized in that: Includes several support frames (1); the support frames (1) are set at the end of the entry section (103) of the steel box girder construction route; The support frame (1) is equipped with a lifting mechanism (2); The lifting mechanism (2) is equipped with several platforms (3); The platform (3) is equipped with a drive mechanism for lifting and moving the steel box girder.

2. The steel beam jacking and lifting working device according to claim 1, characterized in that: The lifting mechanism (2) includes a fixed seat (201) fixed to the top of the support frame (1); The first hydraulic cylinder (202) is installed inside the fixed base (201); The output end of the first oil cylinder (202) is provided with a connecting plate (203), and the connecting plate (203) is connected to the platform (3); The bottom of the connecting plate (203) is provided with several guide posts (204), which slide into the interior of the fixed base (201).

3. The steel beam jacking and lifting working device according to claim 1, characterized in that: Platform (3) includes an entry platform for receiving steel box girders and a jacking platform for docking and jacking. Enter the platform and approach the entry section (103); A lifting mechanism (2) is installed at the bottom of the platform; a fixed column (309) is installed at the bottom of the jacking platform, and the fixed column (309) is fixed to the top of the support frame (1); Both sides of the entry platform and the jacking platform are equipped with protruding plates (305); The drive mechanism is located on the top of the convex plate (305); The driving mechanism is a pusher (4).

4. The steel beam jacking and lifting working device according to claim 3, characterized in that: The entry platform includes a first entry platform (301) and a second entry platform (302), and the push platform includes a first push platform (303) and a second push platform (304). The first entry platform (301) approaches the entry section (103).

5. The steel beam jacking and lifting working device according to claim 3, characterized in that: The jacking platform also includes a secondary pier (331) fixed to the ground; the top of the secondary pier (331) is provided with a support seat (332), and the top of the support seat (332) is provided with a flat plate (333). The drive mechanism is located on the top of the plate (333), and the top of the plate (333) is provided with a support pile (6). The top surface of the support pile (6) is adapted to the top surface of the pier (104).

6. The steel beam jacking and lifting working device according to claim 3, characterized in that: A docking locking mechanism is provided between adjacent platforms (3); The docking locking mechanism includes several stabilizing holes (306) provided at one end of the platform (3). The other end of the platform (3) is equipped with several second hydraulic cylinders (307); the output end of the second hydraulic cylinder (307) is equipped with a stabilizing column (308); The stabilizing post (308) is adapted to the stabilizing hole (306).

7. The steel beam jacking and lifting working device according to claim 3, characterized in that: The top of the platform (3) is provided with a retractable connection mechanism (5) for connecting the platform (3) with the adjacent platform (3) and connecting the platform (3) with the existing bridge structure; The connecting mechanism (5) includes a movable plate (501) that is slidably connected to the top of the platform (3); One end of the movable plate (501) is provided with an arc concave surface, and an adapter plate (502) is provided inside the arc concave surface. One side of the adapter plate (502) is a concave arc surface that matches the concave arc surface, and the other side is a flat surface; Both ends of the adapter plate (502) are fixed with fixing plates (503); The fixed plate (503) is provided with a guide rod (504), which slides into the interior of the movable plate (501); The guide rod (504) is an arc-shaped rod, and the rotation axis of the guide rod (504) and the adapter plate (502) coincides with the axis of the concave surface of the arc. The top of the platform (3) is provided with an active slot (505); The bottom of the movable plate (501) is provided with a movable block (507), which is slidably connected to the inside of the movable groove (505); The movable slot (505) is equipped with a third hydraulic cylinder (506), and the output end of the third hydraulic cylinder (506) is connected to the movable block (507).

8. A method of using the steel beam jacking and lifting working device according to any one of claims 1-7, characterized in that: Includes the following steps: S1. Complete the erection of steel box girders for the section entering the designed route; Complete the erection of the fixed frame for the jacking route and the installation of the jacking machine; S2. An entry beam device is installed at the end of the entry section; S3. The beam transport vehicle transports the beam along the entry section to the beam entry device; S4. The transported steel box girder is connected to the preceding steel box girder at the girder entry device; The beam transport vehicle drove away to prepare for transporting the next section of steel box girder; S5. Repeat S3-S4 until all steel box girders are installed. S6. Construction completed, beam entry device removed; In S3-S5, the jacking operation continued.

9. The method of using the steel beam jacking and lifting working device according to claim 8, characterized in that: The beam feeding device includes a lifting platform and a fixed platform, with a transfer platform between the lifting platform and the fixed platform; a jacking machine is installed on the top of the lifting platform, the fixed platform and the transfer platform; the lifting platform is divided into multiple independently liftable parts; S3 includes: S31, The lifting platform is raised; S32. The beam transport vehicle moves the beam onto the lifting platform; S33. The lifting platform is lowered until it is level with the fixed platform; S34. The beam transport vehicle moves the beam towards the fixed platform until the end of the transported steel box girder is close to the preceding steel box girder. S35. The jacking machine on the fixed platform lifts the steel box girder, and the beam transport vehicle moves the lifting platform. In S4, the end connection of the steel box girder is located above the fixed platform. The jacking machine on the fixed platform works synchronously with the jacking machine on the fixed frame to maintain the synchronicity of the movement of the steel box girder. During the synchronous jacking process, the connection between the newly transported steel box girder and the existing steel box girder is completed.

10. The method of using the steel beam jacking and lifting working device according to claim 9, characterized in that: The bottom of the transfer platform is supported by secondary piers; The secondary piers are made of the same materials as the main piers. The top of the secondary piers is equipped with a support base, and the transfer platform is set on the support base. Support piles are installed on the transfer platform. S6 includes: S61, the penultimate steel box girder was transported to the fixed platform by the girder transport vehicle; S62. One end of the penultimate steel box girder is connected to the existing steel box girder, so that the end of the penultimate steel box girder closest to the entry section rests on the support pile; S63, The beam transport vehicle transports the last section of the steel box girder to the lifting platform; S64. The lifting platform moves down, allowing the steel box girder to move between the first and second-to-last steel box girder sections; S65. Complete the connection at both ends of the last section of the steel box girder; S66. Remove the beam entry device, and retain the secondary piers, support seats, transfer platform and support piles.

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