A device and method for treating foundation settlement of a large-span cast-in-situ bridge support

Abstract

The present invention discloses a device and method for treating the foundation settlement of a large-span cast-in-situ bridge support, and relates to the technical field of bridge construction. The device for treating the foundation settlement of a large-span cast-in-situ bridge support comprises a trough beam, a Bailey beam, and an I-beam. The top of the I-beam is provided with a Bailey beam, the top of the Bailey beam is provided with a trough beam, and the bottom surface of the I-beam is symmetrically provided with bridge piers. The device for reinforcing the foundation of a large-span cast-in-situ bridge support presses and fits the top of the supporting top block with the bottom of the I-beam, and engages the top column with the arc-shaped slot on the inner side of the special-shaped top block. The supporting round pier is then placed directly below the pad, and the top column is aligned with the outer surface of the arc-shaped arch frame. The arc-shaped arch frame and the top column are then fixed by welding. The threaded column is then driven to rotate by turning the hexagonal nut. At this time, the threaded column is screwed outward along the inner wall of the threaded groove to reinforce the bridge and ensure the stability of the entire bridge.

Description

Technical Field

[0001] The present invention relates to the technical field of bridge construction, and in particular to a device and method for processing foundation settlement of a large-span cast-in-situ bridge support. Background Art

[0002] With the continuous development and improvement of transportation infrastructure construction, more and more bridges are being built under complex terrain conditions. When it is necessary to cross ditches, valleys, etc., traditional construction methods require foundation treatment or temporary support to meet construction requirements.

[0003] After the casting of a large-span cast-in-place bridge is completed, the bridge foundation will sink due to the influence of the terrain. Therefore, it is necessary to reinforce the foundation of the cast-in-place bridge. The large-span cast-in-place bridge support has a large span between adjacent piers, so the stability of the support foundation is required to be high. In addition, the existing bridge support has a large risk of horizontal slippage, and high and low steel pipe columns need to be used for adjustment. Since the existing support structure is cumbersome to install, it is easy to cause uneven force. There is horizontal thrust on the upper structure when pouring concrete, and the entire bridge system will experience horizontal slippage. Therefore, the stability of the bridge support is required to be higher. Summary of the Invention

[0004] Technical problems solved

[0005] In response to the shortcomings of the existing technology, the present invention provides a device and method for processing the foundation settlement of a large-span cast-in-situ bridge support, which solves the problem that traditional large-span cast-in-situ bridge supports lack a supporting and fixing structure and cannot ensure the overall stability of the bridge.

[0006] Technical Solution

[0007] To achieve the above objectives, the present invention is implemented through the following technical solutions: a device and method for treating the foundation settlement of a large-span cast-in-situ bridge support, comprising a trough beam, a Bailey beam, and an I-beam, wherein the Bailey beam is provided on top of the I-beam, the trough beam is provided on top of the Bailey beam, bridge piers are symmetrically provided on the bottom surface of the I-beam, a concrete foundation is cast on the bottom of the piers, a gasket is provided on the bottom surface of the I-beam and located between two groups of bridge piers, and a supporting top block is fixedly installed on the bottom surface of the gasket;

[0008] A mounting seat is provided at the bottom of the supporting top block, a double top column is provided at the bottom of the mounting seat, an arc-shaped arch is provided on the outer side of the double top column, a pad is fixedly installed on the bottom of the double top column, a mounting slot is provided on the bottom surface of the pad, a top column is inserted into the inner wall of the mounting slot, a shaft sleeve is fixedly installed on one side surface of the top column, a deflection rod is movably installed on the inner wall of the shaft sleeve, a threaded barrel is provided at one end of the deflection rod, a threaded groove is provided at the other end of the threaded barrel, a threaded column is movably installed on the inner wall of the threaded groove, and a hexagonal nut is provided on the outer side of the threaded column.

[0009] Furthermore, the number of the arc-shaped arches is two groups and they are symmetrically distributed about the center line of the cushion block. The other end of the arc-shaped arch is fixedly connected to the top surface of the cushion block, and the arc-shaped arch is welded to the top column by electric welding.

[0010] Furthermore, an arc-shaped protrusion is provided at the top end of the top column, and the arc-shaped protrusion at the top end of the arc-shaped arch frame is adapted to the size of the arc-shaped slot.

[0011] Furthermore, the double top columns are plug-connected to the mounting base through metal columns. The double top columns are in several groups and are evenly distributed at the bottom of the supporting top block. Each group of double top columns has two columns and are symmetrically distributed about the metal columns.

[0012] Furthermore, the number of the extension sockets is two groups and they are symmetrically distributed about the center line of the support top block. The shape of the extension sockets is square, and the extension sockets can be plugged into ""-shaped steel columns to increase the support stability of the support top block.

[0013] Furthermore, the number of the threaded barrels is two groups and they are symmetrically distributed about the center line of the pad, and the thread grooves opened at the inner ends of the two groups of threaded barrels are in opposite directions.

[0014] Furthermore, the size of the threaded column is adapted to the size of the threaded groove, and the directions of the threads on the outer sides of the threaded groove are opposite and adapted to the threaded groove respectively.

[0015] A method for treating foundation settlement of a large-span cast-in-situ bridge support comprises the following steps:

[0016] Step 1: Assessment and Design: Assess the current status of the bridge support foundation and analyze its bearing capacity to determine the necessity and scope of reinforcement. Conduct detailed engineering design, select reinforcement solutions, and determine reinforcement materials and construction methods.

[0017] Step 2: Preparation of reinforcement materials: Prepare the required reinforcement materials, such as steel bars, concrete, steel plates, prestressed steel strands, etc., according to the design plan and construction requirements, and ensure that the quality and specifications of the materials meet the requirements;

[0018] Step 3: Construction reinforcement: Carry out specific reinforcement work according to the requirements of the design plan and construction drawings;

[0019] Step 4: Support reinforcement: According to the design requirements, add steel supports on the support foundation to increase the stability of the bridge support.

[0020] Furthermore, the construction reinforcement in step 3 includes:

[0021] Strengthen the foundation beam. According to the design plan, fix reinforcement materials such as steel bars, steel plates or FRP on the surface of the foundation beam, and enhance the strength and stability of the foundation beam through methods such as concrete pouring or adhesive curing.

[0022] Prestressed reinforcement, according to design requirements, install prestressed steel strands or use prestressed concrete technology for reinforcement. By tensioning prestressed steel strands or applying prestressed concrete, a prestressed state is formed to improve the bending and shear resistance of the bridge support foundation.

[0023] Foundation reinforcement: According to the design plan, grouting, pressure grouting, soil compaction, etc. are used to improve the properties of the foundation and enhance the bearing capacity and stability of the support foundation.

[0024] Furthermore, the supporting reinforcement in step 4 specifically includes a supporting round pier 5, a force-dividing steel plate 8, a pad 7, a special-shaped top block 11 and a supporting top block 16. The reinforcement of the bridge support is completed by fixing the supporting top block 16 to the bottom surface of the I-beam 3.

[0025] Beneficial effects

[0026] The present invention has the following beneficial effects:

[0027] 1. The large-span cast-in-place bridge support foundation reinforcement device presses the top of the supporting top block against the bottom of the I-beam, and clamps the top column with the arc-shaped slot on the inner side of the special-shaped top block. The supporting round pier is placed directly under the pad, and the top column is fitted with the outer surface of the arc-shaped arch frame. The arc-shaped arch frame and the top column are fixed by welding, and the threaded column is driven to rotate by turning the hexagonal nut. At this time, the threaded column is screwed outward along the inner wall of the threaded groove to reinforce the bridge and ensure the stability of the entire bridge.

[0028] 2. This method of strengthening the foundation of a large-span cast-in-situ bridge support uses large Bailey trusses as supports to span the bridge piers, realizing the construction of a large-span cast-in-situ bridge. The load-bearing area of ​​the bridge piers is increased by reinforcing the foundation. Grouting, pressure grouting, soil compaction, etc. are used to improve the properties of the foundation and enhance the bearing capacity and stability of the support foundation.

[0029] Of course, any product implementing the present invention does not necessarily need to achieve all of the advantages described above at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 This is a schematic structural diagram of a device and method for treating foundation settlement of a large-span cast-in-situ bridge support according to the present invention;

[0031] Figure 2 This is a schematic front view of the Bailey beam structure of the present invention;

[0032] Figure 3 It is a cross-sectional schematic diagram of the present invention;

[0033] Figure 4 This is a schematic diagram of the mounting base structure of the present invention;

[0034] Figure 5 This is a schematic diagram of the cushion structure of the present invention;

[0035] Figure 6 It is a schematic diagram of the top column structure of the present invention.

[0036] In the figure, 1. trough beam; 2. Bailey beam; 3. I-beam; 4. concrete foundation; 5. supporting round pier; 6. bridge pier; 7. spacer; 8. force-sharing steel plate; 9. curved arch frame; 10. top column; 11. special-shaped top block; 12. double top column; 13. gasket; 14. mounting seat; 15. extension socket; 16. supporting top block; 17. mounting slot; 18. curved slot; 19. bushing; 20. deflection rod; 21. threaded barrel; 22. hexagonal nut; 23. threaded column; 24. threaded groove. DETAILED DESCRIPTION

[0037] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0038] In the description of the present invention, it should be understood that the terms "opening", "upper", "lower", "thickness", "top", "middle", "length", "inside", "around" and the like indicating orientation or positional relationship are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the components or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0039] See also Figure 1-6The embodiment of the present invention provides a technical solution: a device and method for treating the foundation settlement of a large-span cast-in-situ bridge support, comprising a trough beam 1, a Bailey beam 2, and an I-beam 3. The Bailey beam 2 is provided on the top of the I-beam 3, the trough beam 1 is provided on the top of the Bailey beam 2, bridge piers 6 are symmetrically provided on the bottom surface of the I-beam 3, a concrete foundation 4 is cast on the bottom of the piers 6, a gasket 13 is provided on the bottom surface of the I-beam 3 and located between two groups of bridge piers 6, and a supporting top block 16 is fixedly installed on the bottom surface of the gasket 13;

[0040] A mounting seat 14 is provided at the bottom of the supporting top block 16, and a double top column 12 is provided at the bottom of the mounting seat 14. An arc-shaped arch frame 9 is provided on the outer side of the double top column 12, and a cushion block 7 is fixedly installed on the bottom surface of the cushion block 7. A mounting slot 17 is provided on the bottom surface of the cushion block 7, and a top column 10 is inserted into the inner wall of the mounting slot 17. A shaft sleeve 19 is fixedly installed on one side surface of the top column 10, and a deflection rod 20 is movably installed on the inner wall of the shaft sleeve 19. A threaded barrel 21 is provided at one end of the deflection rod 20, and a threaded groove 24 is provided at the other end of the threaded barrel 21. A threaded column 23 is movably installed on the inner wall of the threaded groove 24, and a hexagonal nut 22 is provided on the outer side of the threaded column 23.

[0041] Specifically, there are two groups of arc-shaped arches 9 which are symmetrically distributed about the center line of the cushion block 7 , the other end of the arc-shaped arch 9 is fixedly connected to the top surface of the cushion block 7 , and the arc-shaped arch 9 is welded to the top column 10 by electric welding.

[0042] In this embodiment, an arc-shaped arch 9 is provided to decompose the bearing force on the top column 10 and transfer it to the pad 7, and then the support is increased through the support of the force-dividing steel plate 8 and the supporting round pier 5 to increase the stability of the support.

[0043] Specifically, an arc-shaped protrusion is provided at the top of the top column 10 , and the arc-shaped protrusion at the top of the arc-shaped arch 9 is adapted to the size of the arc-shaped slot 18 .

[0044] In this embodiment, the top column 10 is installed by engaging the top column 10 with the arc-shaped slot 18, which facilitates the disassembly and assembly of the reinforcement and provides convenience for bridge construction.

[0045] Specifically, the double top columns 12 are plug-connected to the mounting base 14 through the metal column. The number of double top columns 12 is several groups and is evenly distributed at the bottom of the supporting top block 16. The number of double top columns 12 in each group is two and is symmetrically distributed about the metal column.

[0046] In this embodiment, several groups of double top columns 12 are provided to support the I-beams 3 in steps to ensure the stability of the bridge.

[0047] Specifically, there are two groups of extension sockets 15 and they are symmetrically distributed about the center line of the support top block 16. The extension sockets 15 are square in shape and can be connected to "7"-shaped steel columns to increase the support stability of the support top block 16.

[0048] In this embodiment, a “7”-shaped steel column can be inserted into the inner wall of the extension insertion hole 15 to increase the force-bearing area of ​​the support top block 16 .

[0049] Specifically, there are two groups of threaded barrels 21 symmetrically distributed about the center line of the spacer 7 , and the thread grooves 24 formed at the inner ends of the two groups of threaded barrels 21 are in opposite directions.

[0050] In this embodiment, threaded grooves 24 are provided to adjust the telescopic distance of the two groups of top columns 10, thereby ensuring that the top columns 10 are firmly connected with the arc-shaped slots 18, and ensuring that the pressure on the special-shaped top block 11 is evenly decomposed to the top columns 10 to ensure uniform force.

[0051] Specifically, the size of the threaded column 23 matches the size of the threaded groove 24 , and the directions of the threads on the outer sides of the threaded groove 24 are opposite and respectively match the threaded groove 24 .

[0052] In this embodiment, the hexagonal nut 22 is driven to rotate by using a wrench. Since the threads on the outside of the threaded column 23 are opposite, the threaded column 23 is driven to rotate by rotating the hexagonal nut 22 clockwise. At this time, the threaded column 23 is screwed outward along the inner wall of the threaded groove 24. At this time, the threaded barrel 21 drives the deflection rod 20 to expand outward and then squeezes and tightens the arc-shaped slot 18, thereby completing the fixation of the reinforcement.

[0053] See also Figure 1-6 A method for treating the foundation settlement of a large-span cast-in-situ bridge support comprises the following steps:

[0054] Step 1: Assessment and Design: Assess the current status of the bridge support foundation and analyze its bearing capacity to determine the necessity and scope of reinforcement. Conduct detailed engineering design, select reinforcement solutions, and determine reinforcement materials and construction methods.

[0055] Step 2: Preparation of reinforcement materials: Prepare the required reinforcement materials, such as steel bars, concrete, steel plates, prestressed steel strands, etc., according to the design plan and construction requirements, and ensure that the quality and specifications of the materials meet the requirements;

[0056] Step 3: Construction reinforcement: Carry out specific reinforcement work according to the requirements of the design plan and construction drawings;

[0057] Step 4: Support reinforcement: According to the design requirements, add steel supports on the support foundation to increase the stability of the bridge support.

[0058] Construction reinforcement in step 3 includes:

[0059] Strengthen the foundation beam. According to the design plan, fix reinforcement materials such as steel bars, steel plates or FRP on the surface of the foundation beam, and enhance the strength and stability of the foundation beam through methods such as concrete pouring or adhesive curing.

[0060] Prestressed reinforcement, according to design requirements, install prestressed steel strands or use prestressed concrete technology for reinforcement. By tensioning prestressed steel strands or applying prestressed concrete, a prestressed state is formed to improve the bending and shear resistance of the bridge support foundation.

[0061] Foundation reinforcement: According to the design plan, grouting, pressure grouting, soil compaction, etc. are used to improve the properties of the foundation and enhance the bearing capacity and stability of the support foundation.

[0062] In this implementation plan, the specific operations are as follows:

[0063] A C25 reinforced concrete strip foundation is constructed on each side of the existing foundation. The foundation is 12m long, 0.5m high, and 1m wide. A layer of steel mesh is laid at the bottom of the foundation. The thickness of the steel protective layer is 5cm. The steel mesh is Φ16@250mm along the length of the foundation and Φ16@150mm along the width of the foundation.

[0064] According to the position of the steel pipe column of the trough beam support, the axis position of the foundation reinforcement 529 steel pipe column is determined, and a 10mm thick 0.65m×0.65m steel plate is embedded before pouring the foundation concrete; the embedded steel plate is fixed by welding with steel bars, and the top surface of the steel plate is flush with the top surface of the foundation concrete;

[0065] After the foundation reaches the design strength, install 529 steel pipe columns as required. The column height is 0.7m and can be adjusted appropriately under the condition of satisfying the construction work. To ensure uniform stress on the steel pipe, the top of the steel pipe can be sealed with a 10mm steel plate or the steel pipe can be cut into a U shape according to the structural size of the longitudinal beam. The top surfaces of the reinforced steel pipes on both sides of the same bracket steel pipe column should be kept at the same horizontal plane to prevent uneven stress.

[0066] After the installation of the 529 column is completed, a double-jointed I40a I-beam is placed along the bridge as required. The I-beam is 3.65m long. On the top surface of the I-beam, it is close to the 630 steel pipe column and perpendicular to the I40a I-beam. A double-jointed 25a channel steel is placed on each side of the 630 steel pipe.

[0067] At the tangent point between the I40a I-steel and the [25a channel steel and the 630 steel pipe, the force of the bracket steel pipe is transferred to the I-steel and the channel steel through the steel plate. The steel plate is 2 cm thick and is firmly welded to the 630 steel pipe. The weld height is 400 mm and the weld thickness is 8.3 mm. Double-sided welding is adopted. Considering that the 630 steel pipe is prevented from being deformed by the bending moment at the welding position of the steel plate during the stress process of the steel plate, a 5 cm circular hole is opened at an appropriate position on the 630 steel pipe during the foundation reinforcement construction. Fine stone concrete or cement mortar is filled inside the steel pipe. The filling height should be 10 cm higher than the top of the steel plate.

[0068] The supporting reinforcement in step 4 specifically includes a supporting round pier 5, a force-dividing steel plate 8, a pad 7, a special-shaped top block 11 and a supporting top block 16. The reinforcement of the bridge support is completed by fixing the supporting top block 16 to the bottom surface of the I-beam 3.

[0069] When in use, the top of the support top block 16 is pressed and fitted with the bottom of the I-beam 3, and the top column 10 is clamped with the arc-shaped groove 18 on the inner side of the special-shaped top block 11, and then the support round pier 5 is placed just under the pad 7, and then the top column 10 is fitted with the outer surface of the arc arch frame 9, and then the arc arch frame 9 and the top column 10 are fixed by welding, and then the force-dividing steel plate 8 is clamped with the installation groove 17, and the support round pier 5 is placed stably on the ground, thereby completing the preliminary fixation of the support top block 16, and then the hexagonal nut 22 is driven to rotate by using a wrench. Since the threads on the outside of the threaded column 23 are opposite, the hexagonal nut 22 is turned clockwise to drive the threaded column 23 to rotate. At this time, the threaded column 23 is screwed outward along the inner wall of the threaded groove 24, and the threaded barrel 21 drives the deflection rod 20 to expand outward and then squeezes and tightens the arc-shaped groove 18, thereby completing the fixation of the reinforcement.

[0070] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0071] The preferred embodiments of the present invention disclosed above are intended only to help illustrate the present invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the present invention to the specific embodiments described. Obviously, many modifications and variations are possible based on the content of this specification. These embodiments are selected and described in detail in this specification to better explain the principles and practical applications of the present invention, thereby enabling those skilled in the art to better understand and utilize the present invention. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. A device for treating the foundation settlement of a large-span cast-in-situ bridge support, comprising a trough beam (1), a Bailey beam (2), and an I-beam (3), wherein the Bailey beam (2) is provided on the top of the I-beam (3), and the trough beam (1) is provided on the top of the Bailey beam (2), and wherein: The bottom surface of the I-beam (3) is symmetrically provided with bridge piers (6), the bottom of the bridge piers (6) is cast with a concrete foundation (4), the bottom surface of the I-beam (3) and a position between two groups of bridge piers (6) is provided with a gasket (13), and the bottom surface of the gasket (13) is fixedly installed with a supporting top block (16); The bottom of the supporting top block (16) is provided with a mounting seat (14), the bottom of the mounting seat (14) is provided with a double top column (12), the outer side of the double top column (12) is provided with an arc-shaped arch frame (9), the bottom of the double top column (12) is fixedly installed with a cushion block (7), the bottom surface of the cushion block (7) is provided with a mounting slot (17), the inner wall of the mounting slot (17) is plugged with a top column (10), a side surface of the top column (10) is fixedly installed with a shaft sleeve (19), the inner wall of the shaft sleeve (19) is movably installed with a deflection rod (20), one end of the deflection rod (20) is provided with a threaded barrel (21), the other end of the threaded barrel (21) is provided with a threaded groove (24), the inner wall of the threaded groove (24) is movably installed with a threaded column (23), and the outer side of the threaded column (23) is provided with a hexagonal nut (22).

2. The device for treating foundation settlement of a large-span cast-in-situ bridge support according to claim 1 is characterized in that: The number of the arc-shaped arch frames (9) is two and they are symmetrically distributed about the center line of the cushion block (7). The other end of the arc-shaped arch frame (9) is fixedly connected to the top surface of the cushion block (7). The arc-shaped arch frame (9) is welded to the top column (10) by electric welding.

3. The device for treating foundation settlement of a large-span cast-in-situ bridge support according to claim 1 is characterized in that: The top end of the top column (10) is provided with an arc-shaped protrusion, and the arc-shaped protrusion at the top end of the arc-shaped arch frame (9) is adapted to the size of the arc-shaped slot (18).

4. The device for treating foundation settlement of a large-span cast-in-situ bridge support according to claim 1 is characterized in that: The double top columns (12) are plug-connected to the mounting seat (14) via a metal column. The double top columns (12) are in several groups and are evenly distributed at the bottom of the supporting top block (16). Each group of double top columns (12) has two columns and are symmetrically distributed about the metal column.

5. The device for treating foundation settlement of a large-span cast-in-situ bridge support according to claim 1 is characterized in that: The support top block (16) is provided with an extension socket (15) therein. The extension sockets (15) are provided in two groups and are symmetrically distributed about the center line of the support top block (16). The extension sockets (15) are square in shape. The extension sockets (15) can be connected to a "7"-shaped steel column to increase the support stability of the support top block (16).

6. The device for treating foundation settlement of a large-span cast-in-situ bridge support according to claim 1 is characterized in that: The number of the threaded barrels (21) is two groups and they are symmetrically distributed about the center line of the pad (7), and the thread grooves (24) opened at the inner ends of the two groups of threaded barrels (21) are in opposite directions.

7. The device for treating foundation settlement of a large-span cast-in-situ bridge support according to claim 1 is characterized in that: The size of the threaded column (23) matches the size of the threaded groove (24), and the directions of the threads on the outside of the threaded groove (24) are opposite and respectively match the threaded groove (24).

8. A method for treating the foundation settlement of a large-span cast-in-situ bridge support, using the device for treating the foundation settlement of a large-span cast-in-situ bridge support according to any one of claims 1 to 7, characterized in that: The following steps are involved: Step 1: Assessment and Design: Assess the current status of the bridge support foundation and analyze its bearing capacity to determine the necessity and scope of reinforcement. Conduct detailed engineering design, select reinforcement solutions, and determine reinforcement materials and construction methods. Step 2: Reinforcement material preparation: Prepare the required reinforcement materials according to the design plan and construction requirements: steel bars, concrete, steel plates, and prestressed steel strands, ensuring that the quality and specifications of the materials meet the requirements; Step 3: Construction reinforcement: Carry out specific reinforcement work according to the requirements of the design plan and construction drawings; Step 4: Support reinforcement: According to the design requirements, add steel supports on the support foundation to increase the stability of the bridge support.

9. The method for treating foundation settlement of a large-span cast-in-situ bridge support according to claim 8, characterized in that: The construction reinforcement in step 3 includes: Strengthen the foundation beam. According to the design plan, fix steel bars, steel plates or FRP reinforcement materials on the surface of the foundation beam, and enhance the strength and stability of the foundation beam by pouring concrete or curing the adhesive. Prestressed reinforcement: According to design requirements, prestressed steel strands are installed or prestressed concrete technology is used for reinforcement. By tensioning prestressed steel strands or applying prestressed concrete, a prestressed state is formed to improve the bending and shear resistance of the bridge support foundation; Foundation reinforcement, according to the design plan, uses grouting, pressure grouting or soil compaction to improve the properties of the foundation and enhance the bearing capacity and stability of the support foundation.

10. The method for treating foundation settlement of a large-span cast-in-situ bridge support according to claim 8, characterized in that: The supporting reinforcement member in step 4 specifically includes a supporting round pier (5), a force-dividing steel plate (8), a pad (7), a special-shaped top block (11) and a supporting top block (16), and the reinforcement of the bridge support is completed by fixing the supporting top block (16) to the bottom surface of the I-beam (3).

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