Construction device and method for sliding and side pushing of embedded groove type steel box girder

Abstract

This invention belongs to the field of steel box girder jacking construction technology, specifically relating to a slotted steel box girder sliding side-pushing construction device and method. The slotted steel box girder sliding side-pushing construction device of this invention includes a sliding beam erected on a distribution beam; two rows of guide plates parallel to each other are protruding from the top surface of the sliding beam; it also includes a fixed-point jacking component, the front end of which is connected to a support beam via a hinged telescopic rod; the fixed-point jacking component extends to the corresponding sidewalls of the sliding beam on both sides to form side supports, and positioning anchor points are provided on the sidewalls of the sliding beam; when the positioning anchor points and side supports are locked together, the hinged telescopic rod pushes the support beam to move along the sliding beam; this device has the advantages of compact structure, high modularity, and reusability, and can achieve high-precision jacking operations while ensuring the safety, stability, and reliability of the steel box girder's movement.

Description

Technical Field

[0001] This invention belongs to the field of steel box girder jacking construction technology, specifically relating to a slotted steel box girder sliding and side-pushing construction device and construction method. Background Technology

[0002] There are three main methods for constructing and installing steel box girders: cantilever assembly, scaffold installation, and jacking installation. Among these, the jacking method involves using specialized jacking equipment with temporary supports or longitudinal tracks to push the steel box girder from its assembly position to its installation position. This method is suitable for continuous bridges with large spans and uniform cross-sections, especially for projects with complex underpass environments such as valleys, rivers, or areas requiring cross-traffic crossings. Existing cumulative sliding jacking construction methods for steel box girders can be broadly divided into two categories: overall cumulative sliding construction and segmented cumulative sliding construction. Overall cumulative jacking construction refers to the process where the steel box girder is welded as a whole on the assembly scaffold before being jacked to the predetermined position using a cumulative sliding device. Segmented cumulative sliding construction involves welding sections of the steel box girder onto the assembly scaffold before jacking it to the predetermined position, and then hoisting and welding the next section, repeating this process until the steel box girder reaches the predetermined position. Regardless of the specific jacking method used, the process involves first welding the sliding shoes to the bottom of the steel box girder, then applying a horizontal force to the sliding shoes using jacking equipment to move the steel box girder horizontally. Once the steel box girder is jacked to the designated position, jacks are deployed and the sliding shoes are removed, finally lowering the girder to the permanent pier. However, this process often presents the following problems: First, because the sliding shoes are temporary devices, they are usually directly welded to the bottom web of the steel box girder. Therefore, the welding process requires extremely strict control. While ensuring weld quality, the position of each sliding shoe must also be accurate; otherwise, the steel box girder may shift or tilt, leading to safety hazards. Furthermore, the increased local stress between the sliding shoes and the steel box girder during welding is a significant headache during construction. Second, since the bottom support area of ​​the steel box girder relies solely on sliding shoes arranged at multiple points, this point-to-line contact method during sliding construction can further induce excessive local stress at the contact surface between the jacking equipment and the sliding shoes. Third, the sliding and lowering processes of the steel box girder are separate. After sliding is completed, jacks need to be set up, and then the sliding shoes need to be cut off manually from the steel box girder. The cutting work is extremely time-consuming and labor-intensive, resulting in a long construction period. At the same time, the cut sliding shoes often need to be reprocessed before they can be reused, resulting in a long cycle time. Obviously, this cannot meet the current construction requirements of modular and rapid construction. Fourth, the use of sliding shoes and other support structures will make the temporary supports for steel box girder assembly and sliding construction higher, which will also increase the safety risks for construction workers. Summary of the Invention

[0003] The purpose of this invention is to overcome the shortcomings of the prior art and provide a slotted steel box girder sliding and side-pushing construction device, which has the advantages of compact structure, high modularity and reusability. It can achieve high-precision jacking operation while ensuring the safety, stability and reliability of the steel box girder movement.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] A slotted steel box girder sliding and side-pushing construction device is characterized by: including a slide beam erected on a distribution beam, wherein the length direction of the slide beam is parallel to the travel direction of the steel box girder; the top surface of the slide beam is provided with two rows of guide plates that are parallel to each other, and the two rows of guide plates and the top surface of the slide beam together form a slide that can accommodate the support beam at the steel box girder and guide the travel direction of the support beam;

[0006] The device also includes a fixed-point jacking assembly that forms a guide rail engagement with the guide plate. The front end of the fixed-point jacking assembly is connected to the support beam via a hinged telescopic rod. The fixed-point jacking assembly extends to the corresponding side walls of the slide beam on both sides to form side supports. The side walls of the slide beam are provided with positioning anchor points for locking and unlocking actions with the side supports. When the positioning anchor points lock with the side supports, the hinged telescopic rod pushes the support beam to move along the slide beam.

[0007] Preferably, the slide beam is an I-beam, and stiffening ribs are arranged in the slots on both sides of the slide beam. The stiffening ribs are evenly distributed in sequence along the length of the slide beam, and the stiffening rib plate surface is perpendicular to the length of the slide beam. The stiffening ribs constitute the positioning anchor points. The side support is recessed with a groove, and the groove and the positioning anchor point form a plug-in locking fit.

[0008] Preferably, the fixed-point jacking assembly includes a housing, the bottom of which is recessed to form a guide groove with the guide plate, and the hinged telescopic rod is hinged to the front of the housing; the top of the side support is horizontally hinged to the side wall of the housing with the hinge axis parallel to the length of the slide beam, and the bottom of the side support extends to the bottom of the grooves on both sides of the slide beam to form an "L"-shaped plate structure, and the extended end of the side support is provided with the groove.

[0009] Preferably, the side support is driven by a hydraulic piston cylinder to generate a hinged swinging motion. The hydraulic piston cylinder is fixed inside the housing, and the piston rod end of the hydraulic piston cylinder extends obliquely and is hinged to the side support through a hinge point, the axis of which is parallel to the hinge axis.

[0010] Preferably, the hinged telescopic rod is a hydraulic telescopic rod, and both ends of the hinged telescopic rod are hinged to the support beam and the housing through hinge ears.

[0011] Preferably, the shell is in the shape of a square box, and the side wall of the shell is recessed with a storage groove for storing the side support of the "L"-shaped plate structure; the bottom of the storage groove is provided with a buffer sleeve to reduce the impact force when the side support is retracted.

[0012] Preferably, the support beam includes a starting beam and an intermediate beam that can be assembled with each other. One end of the starting beam forms a mating end that cooperates with the front end of the hinged telescopic rod, and the other end is provided with a process hole. Both ends of the intermediate beam are provided with reserved holes in the same position and number as the corresponding ends of the starting beam. Fastening bolts pass through the process holes and the reserved holes to fasten the adjacent starting beam and intermediate beam.

[0013] Preferably, the stroke of the hinged telescopic rod is an integer multiple of the distance between adjacent positioning anchor points.

[0014] Preferably, the construction method employs the aforementioned slotted steel box girder sliding and side-pushing construction device, characterized by including the following steps:

[0015] S1. Before construction, reset and debugging are carried out, that is: start the pump station so that the groove of the lower part of the side support is inserted into the positioning anchor point on the side of the slide beam, and at the same time the hinged telescopic rod is in the retracted state. At this time, the steel box girder is hoisted and installed. After the installation is completed, the cumulative sliding and jacking construction can be carried out.

[0016] S2. During the cumulative sliding and jacking construction, the pump station is started to deliver hydraulic oil to the articulated telescopic rod. At this time, the extension of the articulated telescopic rod drives the steel box girder to slide towards the permanent pier. Meanwhile, the groove at the bottom of the side support always remains in the state of being locked into the positioning anchor point, thereby providing a base point for the horizontal force.

[0017] S3. When the articulated telescopic rod extends one stroke, the pump station pumps hydraulic oil into the hydraulic piston cylinder, causing the hydraulic piston cylinder to extend and the connected side support to open, so that the groove at the side support gradually disengages from the positioning anchor point until it is completely disengaged; then, the articulated telescopic rod performs a return stroke and pulls the fixed-point jacking assembly forward as a whole; when the articulated telescopic rod finishes its return stroke, the groove reaches the starting position of the next predetermined stroke and engages with the new positioning anchor point;

[0018] S4. Repeat steps S2 to S3 until the jacking steel box girder reaches the space above the permanent support, thus completing the current cumulative sliding jacking operation.

[0019] Preferably, the construction method employs the aforementioned slotted steel box girder sliding and side-pushing construction device, characterized by including the following steps:

[0020] S1' Before construction, reset and debugging are carried out, that is: start the pump station so that the groove of the lower part of the side support is engaged with the positioning anchor point on the side of the slide beam, and at the same time the hinged telescopic rod is in the retracted state; then, the steel box girder is divided into sections, the first section of the steel box girder is placed in the starting position, and the cumulative sliding construction begins after the hoisting is completed.

[0021] S2' During the cumulative sliding and jacking construction, the pump station is started to deliver hydraulic oil to the articulated telescopic rod. At this time, the extension of the articulated telescopic rod causes the first segment of the steel box girder to slide towards the permanent pier. Meanwhile, the groove at the bottom of the side support always remains in the state of being locked into the positioning anchor point, thereby providing a base point for the horizontal force.

[0022] S3' When the articulated telescopic rod extends one stroke, the pump station pumps hydraulic oil into the hydraulic piston cylinder, causing the hydraulic piston cylinder to extend and the connected side support to begin to open, so that the groove at the side support gradually disengages from the positioning anchor point until it is completely disengaged; then, the articulated telescopic rod performs a return stroke and pulls the fixed-point jacking assembly forward as a whole; when the articulated telescopic rod finishes its return stroke, the groove reaches the starting position of the next predetermined stroke and engages with the new positioning anchor point;

[0023] S4' Repeat steps S2' to S3' until there is enough space between the starting position and the first segment of the steel box girder to place the next segment of the steel box girder, then proceed to step S5'.

[0024] S5' Disassemble the fixed-point jacking component and move it to the initial position. Hoist the next segment of the steel box girder and weld it to the first segment of the steel box girder. Then repeat steps S2' to S4' until all segments of the steel box girder are welded and assembled. Then proceed to step S6'.

[0025] S6', repeat steps S2' to S3' until the jacking steel box girder reaches above the permanent support, thus completing the current cumulative sliding jacking construction operation.

[0026] The beneficial effects of this invention are as follows:

[0027] 1) Abandoning the traditional slipper operation method, this invention innovatively adopts a slipperless step-slide jacking system, combined with a fixed-point jacking component that can be independently assembled and disassembled relative to the slideway. This ensures both rapid and accurate pushing of the steel box girder on the slideway and allows for multiple functions, such as changing the working position of the fixed-point jacking component as needed, making it highly flexible and adaptable. Furthermore, the slideway design ensures reliable jacking performance while achieving higher jacking accuracy and a correspondingly lower operating height, thus enhancing safety. Simultaneously, the steel box girder can be directly placed on the support beam, making assembly and disassembly easier and changing the traditional point-to-line contact to line-to-line contact, effectively eliminating the problem of excessive local stress in the slipper area, resulting in significant improvements.

[0028] As can be seen, during cumulative sliding construction, the sliding track of this invention serves not only as a guide for the steel frame beam but also as a positioning and guiding component for the fixed-point jacking assembly, which greatly facilitates prefabricated construction. Each sliding track beam and support beam can be assembled and spliced, resulting in high recyclability and eliminating the need for later cutting, thus reducing costs and shortening the construction period. Therefore, this invention possesses the advantages of compact structure, high modularity, and reusability, enabling high-precision jacking operations while ensuring the safety, stability, and reliability of the steel box girder's movement.

[0029] 2) For the positioning anchor points, they can be positioning holes or positioning pins, or pluggable fin structures or even hook-lock structures, as long as they can achieve autonomous locking and unlocking functions. This invention preferably uses a stiffening rib combined with a groove, which allows for quick insertion and locking, enabling flexible unlocking and locking. Simultaneously, considering that the slide beam is the overall load-bearing component, it is completely planar with the upper support beam, thus distributing the force as evenly as possible while also bearing a very large load; therefore, the stiffening ribs further enhance the load-bearing capacity of the slide beam, thereby further improving the reliability and stability of the device, achieving multiple benefits.

[0030] 3) Regarding the housing, on the one hand, the bottom groove and guide plate form a sliding rail guide engagement; on the other hand, it forms the base for the side supports and the hinged telescopic rods, thus achieving a compact structure. In actual design, the side supports are hydraulically driven, and the hinged telescopic rods are driven similarly to ensure their working performance.

[0031] 4) The storage slot design allows the side supports to be retracted in their initial state, further miniaturizing the overall size. Simultaneously, the storage slot facilitates the installation of the buffer sleeve and provides a relatively tidy working environment, promoting its long-term use. The buffer sleeve can be a buffer spring, gas spring, or hydraulic damping component; the appropriate option can be selected based on the site conditions, which will not be elaborated upon here.

[0032] 5) The stroke of the articulated telescopic rod is an integer multiple of the distance between adjacent positioning anchor points. This ensures that each stroke of the articulated telescopic rod is accompanied by a single-stroke movement of the fixed-point jacking component. After this movement is completed, the side support disengages from the original positioning anchor point, and the articulated telescopic rod returns to its initial position. At this point, the side support is positioned directly above the next positioning anchor point, facilitating the next insertion and positioning. Clearly, this design greatly simplifies the overall operation process, significantly improving on-site construction efficiency and yielding remarkable results. Attached Figure Description

[0033] Figure 1 and Figure 3 This is a diagram showing the working state of the present invention;

[0034] Figure 2 for Figure 1 A magnified view of part I;

[0035] Figure 4 for Figure 3 Enlarged view of part II;

[0036] Figure 5 and Figure 6 A three-dimensional structural diagram of the fixed-point jacking component when the side support is in its initial state;

[0037] Figure 7 A three-dimensional structural diagram of the fixed-point jacking component when the side support is in the open state;

[0038] Figure 8 This is a diagram showing the installation state of a hydraulic piston cylinder.

[0039] The actual correspondence between the reference numerals and component names in this invention is as follows:

[0040] a-Steel box girder; b-Support column; c-Distribution beam;

[0041] 10-Slide beam; 11-Guide plate; 12-Positioning anchor point;

[0042] 20 - Support beam;

[0043] 30-Point jacking assembly; 31-Hinged telescopic rod; 32-Side support; 32a-Mouth; 33-Housing; 33a-Bottom groove; 33b-Storage groove; 34-Hydraulic piston cylinder; 35-Buffer sleeve. Detailed Implementation

[0044] For ease of understanding, this section combines... Figure 1-8 The specific structure and operation of the present invention are further described below:

[0045] The specific structure of the present invention is as follows: Figure 1-8As shown, its main structure includes a fixed-point jacking assembly 30 and a sliding system built around the fixed-point jacking assembly 30; wherein:

[0046] The fixed-point jacking assembly 30 includes a hydraulic extension arm, namely the articulated telescopic rod 31, which provides power for the sliding construction of the steel box girder. The front end of the articulated telescopic rod 31 is hinged to the support beam 20 at the lower part of the steel box girder a via a hinge lug, thereby enabling the steel box girder a to move from the temporary assembly support to the permanent pier through the extension of the articulated telescopic rod 31. At the same time, the rear end of the articulated telescopic rod 31 is also connected to the shell 33 via a hinge lug, and is engaged with the stiffening rib, i.e., the positioning anchor point 12, on the sliding beam 10 through the groove 32a at the shell 33, thereby providing a reaction force sufficient to withstand the force generated during sliding, so that the articulated telescopic rod 31 can jack the steel box girder a and its lower support beam 20 and slide it in a predetermined direction.

[0047] Furthermore, the articulated telescopic rod 31 consists of a cylinder, inlet and outlet oil ports, and an extension rod, so that the pump station can supply hydraulic oil as needed. By controlling the amount of hydraulic oil inside the cylinder through the pump station, the articulated telescopic rod 31 can achieve its movement, thereby driving the... Figure 1-2 and Figure 5-6 The articulated telescopic rod 31 shown drives the steel box girder a forward, and after completing one cumulative sliding and jacking stroke, the return stroke of the articulated telescopic rod 31 drives the steel box girder a forward. Figure 3-4 and Figure 7 The side support 32, which is in the open position, moves forward to proceed to the next construction stage.

[0048] For housing 33, such as Figure 5-8 As shown, its overall shape is a square box, and it is equipped with a side support 32 with a groove 32a and the aforementioned hinged telescopic rod 31. The bottom surface of the housing 33 is as follows. Figure 6-7 The bottom groove 33a shown is designed to match the two rows of guide plates 11 pre-set at the slide beam 10 to form a slide. A hydraulic piston cylinder 34 is installed inside the housing 33 to drive the side support 32 hinged to the housing 33 to produce... Figure 5-7 The initial and opening actions are shown. An oil hole is correspondingly provided on the top of the housing 33 to drive the hydraulic piston cylinder 34.

[0049] During the design process, on the one hand, the two sides of the housing 33 are provided with... Figure 7The storage groove 33b shown is for placing the side support 32. A buffer sleeve 35 is arranged inside the storage groove 33b to provide cushioning. On the other hand, the side support 32 is made of an L-shaped steel plate. The top of the short section of the side support 32, i.e., the extended end, has a cut with a guide radius. The width of the cut is slightly wider than the width of the stiffening rib at the slide beam 10. This cut forms the groove 32a. By engaging with the stiffening rib, which serves as the positioning anchor point 12, the reaction force generated by the cumulative sliding and pushing of the steel box girder can be transferred to the slide beam 10, ensuring the stability and reliability of the device. The hydraulic piston cylinder 34, located inside the housing 33, functions to drive the side support 32 to perform a hinged action. Therefore, the piston rod end of the hydraulic piston cylinder 34 needs to be hinged to the long section of the side support 32. Figure 8 The diagram shown is a structural schematic of one embodiment of the hydraulic piston cylinder 34, namely a Y-shaped hydraulic cylinder body. Each cylinder body independently constitutes a set of hydraulic piston cylinders 34, thereby driving the corresponding side support 32 to open and close, realizing the action of engaging the groove 32a and releasing the stiffening rib.

[0050] In actual assembly, the assembly structure of the present invention refers to... Figure 1-4 As shown, where:

[0051] During the cumulative sliding and jacking construction of steel box girders, two fixed-point jacking components 30 are generally set up. Before the cumulative sliding and jacking construction of steel box girder a, the support column b, distribution beam c, sliding beam 10, and support beam 20 are installed in the predetermined positions. The support beam 20 is placed in the sliding track of the sliding beam 10, and the end of the support beam 20 that mates with the hinge lug faces the starting end of the cumulative sliding and jacking construction.

[0052] During construction, the steel box girder a is placed directly on the supporting beam 20, and its transport stability can be ensured by utilizing the self-weight of the steel box girder a and the static friction generated by its cooperation with the supporting beam 20.

[0053] After installation, align the bottom groove 33a of the housing 33 of the fixed-point jacking assembly 30 with the two rows of guide plates 11 of the slide beam 10 until they fit together. At the same time, hinge the front end of the hinged telescopic rod 31 to the end of the support beam 20. Then, connect each oil hole to the pump station, and control the hinged telescopic rod 31 and the hydraulic piston cylinder 34 to produce the predetermined actions through the pump station.

[0054] Before the jacking operation, the device needs to be debugged. Then, the pump station is started so that the groove 32a at the bottom of the side support 32 is inserted into the positioning anchor point 12 on the side of the slide beam 10. At the same time, the hinged telescopic rod 31 is in the retracted state. At this time, the steel box beam a is hoisted and installed. After the installation is completed, the cumulative sliding jacking operation can be carried out.

[0055] During the cumulative sliding jacking construction, the pump station is activated, allowing hydraulic oil to be delivered to the articulated telescopic rod 31. The extension of the articulated telescopic rod 31 causes the steel box girder a to slide along the track towards the permanent pier. Simultaneously, the groove 32a at the lower part of the side support 32 remains engaged with the positioning anchor point 12, thus providing a base point for horizontal force application. When the articulated telescopic rod 31 has extended one stroke, the pump station pumps hydraulic oil into the hydraulic piston cylinder 34, causing the hydraulic piston cylinder 34 to extend and the connected side support 32 to open. This allows the groove 32a at the side support 32 to gradually disengage from the positioning anchor point 12 until it is completely disengaged. Subsequently, the articulated telescopic rod 31 performs a return stroke, pulling the fixed-point jacking assembly 30 forward. When the return stroke of the articulated telescopic rod 31 ends, the groove 32a reaches the starting position of the next predetermined stroke and engages with a new positioning anchor point. This process is repeated until the jacked steel box girder a reaches above the permanent pier, completing the current cumulative sliding jacking operation.

[0056] It is worth noting that the above embodiments describe the overall cumulative sliding and jacking construction of the steel box girder, that is, the cumulative sliding construction carried out after the main body of the steel box girder has been welded. The overall cumulative sliding and jacking construction is suitable for situations where the steel box girder a has a small volume and a large site.

[0057] When the volume of the steel box girder a is large and the jacking construction site is small, an additional construction method of "splicing-sliding-splicing" must be adopted, namely:

[0058] First, the steel box girder a is divided into segments. The outermost segment, i.e., the first segment, is placed at the starting position. Then, the cumulative sliding construction begins normally until the position for the next segment of the steel box girder a is reserved. Next, the fixed-point jacking assembly 30 is moved to the starting position, the next segment of the steel box girder a is hoisted and welded to the outermost segment of the steel box girder a. The operation of the fixed-point jacking assembly 30 is repeated until the main body of the steel box girder is welded as a whole. Then, the overall cumulative sliding is carried out until the steel box girder a reaches the permanent support, thus completing the segmented cumulative sliding construction of the steel box girder a.

[0059] Furthermore, during segmented cumulative sliding construction, the lower support beam 20 of the steel box girder a can be arranged in two types, named the starting beam and the intermediate beam respectively. One end of the starting beam forms a mating structure, such as an ear plate, that engages with the hinged lug at the front end of the hinged telescopic rod 31. The other end is provided with several circular process holes. Both ends of the intermediate beam are provided with the same number and position of the starting beam. The holes at both ends are spliced ​​using fastening bolts and washers. Then, the steel box girder a segment is hoisted onto the upper part of the support beam 20 and assembled and welded. After this step is completed, the fixed-point jacking assembly 30 is adjusted to jack the steel box girder a and the support beam 20. After reaching the predetermined position, the outermost segment of the steel box girder a is welded and assembled with the next segment. After this work is completed, the next jacking operation can be carried out. If the current segment of the supporting beam 20 cannot meet the requirements for the next welding and assembly work when the pre-reserved position is reached, the starting beam and its connected intermediate beam are disassembled. The fixed-point jacking assembly 30 and the starting beam are moved to a distance sufficient to place another intermediate beam. Then, the new intermediate beam is spliced ​​with the intermediate beam supporting steel box girder a, and its other end is spliced ​​with the end of the starting beam. The side support 32 is then retracted until it engages the stiffening ribs on the side of the slide beam 10, allowing for the hoisting and welding of the next segment of steel box girder a. Once the segment splicing of steel box girder a is complete, the jacking operation can be performed again. This process is repeated until the entire main body of steel box girder a is assembled, at which point the overall jacking operation can be performed.

[0060] In the support beam 20, the intermediate beam should be set as an integer multiple of the distance between the two stiffening ribs on the side of the slide beam 10, so that after the starting beam with the fixed-point jacking component 30 is connected to the intermediate beam, the side support 32 can always be kept above the stiffening ribs on the side of the slide beam 10, and the side support 32 can still hold the stiffening ribs on the side of the slide beam 10 when it retracts.

[0061] In the above two sets of embodiments of the present invention, the pumping station can switch between manual and automatic modes to meet the requirements of timely adjustment and monitoring during the jacking construction of the steel box girder.

[0062] Of course, after the aforementioned cumulative sliding and jacking construction is completed, since the end of the sliding beam 10 is the beam lowering device; after the steel box girder a reaches above the permanent pier, the beam lowering device is used to support the steel box girder a, the supporting beam 20 is removed, and after the system transformation is completed, the beam can be lowered to the permanent pier to complete the final bridge erection operation. The beam lowering is a conventional process operation, which will not be described in detail here; since there is no additional welding or other fixed connection between the steel box girder a and the supporting beam 20, the beam lowering efficiency can be further improved, thereby further accelerating the construction cycle.

[0063] Therefore, 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, but also includes the same or similar structures that can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. Thus, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description. Therefore, 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.

[0064] 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.

[0065] The technologies, shapes, and structures not described in detail in this invention are all known technologies.

Claims

1. A slotted steel box girder sliding and lateral pushing construction device, characterized in that: Includes a slide beam (10) erected on the distribution beam, the length direction of the slide beam (10) being parallel to the travel direction of the steel box girder; the top surface of the slide beam (10) is provided with two rows of guide plates (11) parallel to each other, the two rows of guide plates (11) and the top surface of the slide beam (10) together enclose to form a slide that can accommodate the support beam (20) at the steel box girder and guide the travel direction of the support beam (20); The device also includes a fixed-point jacking assembly (30) that forms a guide rail cooperation with the guide plate (11). The front end of the fixed-point jacking assembly (30) is connected to the support beam (20) through a hinged telescopic rod (31). The fixed-point jacking assembly (30) extends to the corresponding side wall of the slide beam (10) on both sides to form a side support (32). The side wall of the slide beam (10) is provided with a positioning anchor point (12) for locking and unlocking with the side support (32). When the positioning anchor point (12) locks with the side support (32), the hinged telescopic rod (31) pushes the support beam (20) to move along the slide beam (10). The slide beam (10) is an I-beam. Stiffening ribs are arranged in the slots on both sides of the slide beam (10). The stiffening ribs are evenly distributed in sequence along the length of the slide beam (10), and the stiffening rib plate surface is perpendicular to the length of the slide beam (10). The stiffening ribs constitute the positioning anchor point (12). The side support (32) is recessed with a groove (32a). The fixed-point pushing assembly (30) includes a shell (33). The top of the side support (32) is horizontally hinged to the side wall of the shell (33) and the hinge axis is parallel to the length of the slide beam (10). In the direction, the bottom end of the side support (32) extends towards the bottom of the groove on both sides of the slide beam (10) to form an "L"-shaped plate structure. The extended end of the side support (32) is recessed with a groove (32a). The shell (33) is square box-shaped. The side wall of the shell (33) is recessed with a storage groove (33b) for storing the side support (32) of the "L"-shaped plate structure. When the groove (32a) and the positioning anchor point (12) form a plug-in locking fit, the side support (32) is stored in the storage groove (33b).

2. The slotted steel box girder sliding and side-pushing construction device according to claim 1, characterized in that: The bottom of the housing (33) is recessed and has a bottom groove (33a) that forms a guide rail fit with the guide plate (11). The hinged telescopic rod (31) is hinged to the front of the housing (33).

3. The slotted steel box girder sliding and side-pushing construction device according to claim 2, characterized in that: The side support (32) is driven by a hydraulic piston cylinder (34) to generate a hinged swing action. The hydraulic piston cylinder (34) is fixed inside the housing (33), and the piston rod end of the hydraulic piston cylinder (34) extends obliquely and is hinged to the side support (32) through a hinge point. The axis of the hinge point is parallel to the hinge axis.

4. A slotted steel box girder sliding and side-pushing construction device according to claim 2 or 3, characterized in that: The hinged telescopic rod (31) is a hydraulic telescopic rod, and both ends of the hinged telescopic rod (31) are hinged to the support beam (20) and the shell (33) through hinge ears.

5. A slotted steel box girder sliding and side-pushing construction device according to claim 2 or 3, characterized in that: A buffer sleeve (35) is arranged at the bottom of the storage slot (33b) to reduce the impact force when the side support (32) is retracted.

6. A slotted steel box girder sliding and side-pushing construction device according to claim 1, 2, or 3, characterized in that: The support beam (20) includes a starting beam and an intermediate beam that can be assembled with each other. One end of the starting beam forms a mating end that mates with the front end of the hinged telescopic rod (31), and the other end is provided with a process hole. Both ends of the intermediate beam are provided with reserved holes of the same position and number as the corresponding ends of the starting beam. Fastening bolts pass through the process holes and reserved holes to fasten the adjacent starting beam and intermediate beam.

7. A slotted steel box girder sliding and side-pushing construction device according to claim 1, 2, or 3, characterized in that: The stroke of the articulated telescopic rod (31) is an integer multiple of the distance between adjacent positioning anchor points (12).

8. A construction method, wherein the construction method employs the slotted steel box girder sliding and side-pushing construction device as described in claim 1, characterized in that... Includes the following steps: S1. Before construction, reset and debug, that is: start the pump station so that the groove (32a) at the bottom of the side support (32) is inserted into the positioning anchor point (12) on the side of the slide beam (10), and at the same time the hinged telescopic rod (31) is in the retracted state. At this time, the steel box girder is hoisted and installed. After the installation is completed, the cumulative sliding and jacking construction can be carried out. S2. During the cumulative sliding and jacking construction, the pump station is started so that the hydraulic oil is delivered to the hinged telescopic rod (31). At this time, the extension of the hinged telescopic rod (31) drives the steel box girder to slide towards the permanent pier. Meanwhile, the groove (32a) at the bottom of the side support (32) always remains in the state of being stuck into the positioning anchor point (12), thereby providing the effect of providing the base point for the horizontal force. S3. When the articulated telescopic rod (31) extends by one stroke, the pump station pumps hydraulic oil into the hydraulic piston cylinder (34), causing the hydraulic piston cylinder (34) to extend and causing the connected side support (32) to open, so that the groove (32a) at the side support (32) gradually disengages from the positioning anchor point (12) until it is completely disengaged; then, the articulated telescopic rod (31) performs a return stroke and pulls the fixed-point jacking assembly (30) forward as a whole; when the return stroke of the articulated telescopic rod (31) ends, the groove (32a) reaches the starting position of the next predetermined stroke and engages with the new positioning anchor point; S4. Repeat steps S2 to S3 until the jacking steel box girder reaches the space above the permanent support, thus completing the current cumulative sliding jacking operation.

9. A construction method, wherein the construction method employs the slotted steel box girder sliding and side-pushing construction device as described in claim 1, characterized in that... Includes the following steps: S1' Before construction, reset and debugging are carried out, that is: start the pump station so that the groove (32a) at the bottom of the side support (32) is inserted into the positioning anchor point (12) on the side of the slide beam (10), and at the same time the hinged telescopic rod (31) is in the retracted state; then, the steel box girder is divided into sections, the first section of the steel box girder is placed in the starting position, and the cumulative sliding construction begins after the hoisting is completed; S2' During the cumulative sliding and jacking construction, the pump station is started so that the hydraulic oil is delivered to the hinged telescopic rod (31). At this time, the extension of the hinged telescopic rod (31) causes the first segment of the steel box girder to slide towards the permanent pier. Meanwhile, the groove (32a) at the bottom of the side support (32) always remains in the state of being stuck into the positioning anchor point (12), thereby providing the effect of providing the base point for the horizontal force. S3' When the articulated telescopic rod (31) extends by one stroke, the pump station pumps hydraulic oil into the hydraulic piston cylinder (34), causing the hydraulic piston cylinder (34) to extend and causing the connected side support (32) to open, so that the groove (32a) at the side support (32) gradually disengages from the positioning anchor point (12) until it is completely disengaged; then, the articulated telescopic rod (31) performs a return stroke and pulls the fixed-point jacking assembly (30) forward as a whole; when the return stroke of the articulated telescopic rod (31) ends, the groove (32a) reaches the starting position of the next predetermined stroke and engages with the new positioning anchor point; S4' Repeat steps S2'~S3' until there is enough space between the starting position and the first segment of the steel box girder to place the next segment of the steel box girder, then proceed to step S5'. S5' Disassemble the fixed-point jacking component (30) and move it to the initial position. Hoist the next segment of the steel box girder and weld it to the first segment of the steel box girder. Then repeat steps S2'~S4' until all segments of the steel box girder are welded and assembled. Then proceed to step S6'. S6', repeat steps S2'~S3' until the jacking steel box girder reaches above the permanent support, thus completing the current cumulative sliding jacking construction operation.

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