Submerged type lifting cofferdam structure for ancient bridge scouring protection

Abstract

The utility model is applicable to the technical field of ancient bridge protection, and particularly relates to a submerged lifting cofferdam structure for ancient bridge scouring protection, which comprises two fixed cofferdams which are symmetrically arranged and detachably connected together, the surfaces of the fixed cofferdams are slidably connected with a lifting cofferdam, and the lifting cofferdam is connected with the lifting cofferdam. And a hydraulic telescopic rod is mounted on the surface of the fixed cofferdam. By arranging the fixed cofferdam, the lifting cofferdam, the water level sensor, the hydraulic telescopic rod, the controller and other structures, intelligent response and dynamic adjustment to water level changes are achieved, the cofferdams can be automatically lifted according to the real-time water level, and scouring of water flow to the ancient bridge foundation is effectively relieved. The stability in the lifting process is guaranteed through cooperation of the sliding blocks and the sliding grooves, and the stability and safety of the structure are further improved through fixing bolts and a locking structure. Each core component adopts a waterproof design, is suitable for long-time underwater operation, does not influence the appearance of the ancient bridge, and has good adaptability, reliability and popularization and application value.

Description

Technical Field

[0001] This utility model relates to the field of ancient bridge protection technology, specifically a submerged lifting cofferdam structure for erosion protection of ancient bridges. Background Technology

[0002] Due to their age and the fact that many ancient bridges are built within natural river channels, they are constantly subjected to erosion from water flow, floods, and riverbed changes. This makes their pier foundations prone to exposure and subsidence, which can even lead to structural loosening and reduced load-bearing capacity, threatening the overall safety and lifespan of the ancient bridge. Therefore, in the field of water conservancy protection and ancient bridge reinforcement, a series of erosion control technologies have been developed, including riprap foundations, concrete abutments, and submerged embankments, to enhance the erosion resistance of the bridge foundation area. While these measures are practical to some extent, they largely rely on manual construction, are costly, and their protective effects are easily limited in natural environments with frequently changing water levels.

[0003] In recent years, some technical solutions have attempted to use cofferdam structures for fixed-point protection of ancient bridge foundations. Cofferdams, as an effective means of blocking and controlling water flow, have been widely used in bridge construction and the protection of underwater structures. Some technologies involve setting up fixed cofferdams or constructing retaining walls around the bridge piers to mitigate the impact of water flow. However, these fixed structures often suffer from insufficient adaptability in practical applications. For example, the fixed height cannot be dynamically adjusted with water level fluctuations, which can easily become new obstacles to water flow, affecting the aquatic ecosystem and navigation safety. Moreover, many ancient bridges are located in areas with weak foundations, making underwater construction and fixation of cofferdam structures technically challenging, increasing maintenance costs and operational risks. Utility Model Content

[0004] The purpose of this utility model embodiment is to provide a submerged lifting cofferdam structure for erosion protection of ancient bridges, aiming to solve the technical problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A submerged lifting cofferdam structure for erosion protection of ancient bridges includes two symmetrically arranged fixed cofferdams, which are detachably connected together. A lifting cofferdam is slidably connected to the surface of the fixed cofferdams, and a hydraulic telescopic rod is installed on the surface of the fixed cofferdams. One end of the hydraulic telescopic rod is connected to a lifting column, and the lifting column is fixedly connected to the lifting cofferdam.

[0007] The surface of the fixed cofferdam is provided with support columns, and the surface of the support columns is provided with square holes. The square holes are provided with fixing bolts. The surface of the lifting cofferdam is provided with several fixing threaded grooves.

[0008] A water level sensor is installed on the top of the side of the lifting cofferdam.

[0009] Furthermore, the surface of the lifting cofferdam is equipped with sliders and connecting rods, and the surface of the fixed cofferdam is provided with a sliding groove. The lifting cofferdam is slidably connected to the surface of the fixed cofferdam through the cooperation of the sliders and the sliding grooves.

[0010] Furthermore, the diameters of the fixing bolt and the fixing thread groove are the same, and the outer diameter of the nut of the fixing bolt is greater than the width of the square hole.

[0011] Furthermore, a controller is installed on the surface of the fixed cofferdam.

[0012] Furthermore, the lifting cofferdam is an L-shaped structure.

[0013] Furthermore, both of the fixed cofferdams have threaded holes on their surfaces, and connecting bolts are engaged inside the threaded holes, with locking nuts fitted on the outside of the connecting bolts.

[0014] Furthermore, the surface of the fixed cofferdam is provided with mounting threaded holes, and mounting bolts are engaged inside the mounting threaded holes.

[0015] The present invention provides a submerged lifting cofferdam structure for erosion protection of ancient bridges, which has the following beneficial effects:

[0016] This invention, through the installation of a fixed cofferdam, a lifting cofferdam, a water level sensor, a hydraulic telescopic rod, and a controller, achieves intelligent response and dynamic adjustment to water level changes. It can automatically raise and lower the cofferdam based on real-time water levels, effectively mitigating the erosion of the ancient bridge's foundation by the water flow. The cooperation between the slider and the sliding groove ensures the smoothness of the lifting process, while the fixing bolts and locking structure further enhance the stability and safety of the structure. All core components are waterproof, allowing for prolonged underwater operation without affecting the appearance of the ancient bridge, demonstrating excellent adaptability, reliability, and potential for widespread application. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of a submerged lifting cofferdam structure used for erosion protection of ancient bridges.

[0018] Figure 2 This is a structural diagram of a submerged lifting cofferdam structure used for erosion protection of ancient bridges, including a fixed cofferdam, a lifting cofferdam, and various components mounted on the fixed and lifting cofferdams.

[0019] Figure 3 This is a structural diagram of a fixed cofferdam and various components mounted on the fixed cofferdam in a submerged lifting cofferdam structure used for erosion protection of ancient bridges.

[0020] Figure 4 This is a schematic diagram of the hydraulic telescopic rod, the lifting column, and the rear structure of the lifting cofferdam in a submerged lifting cofferdam structure used for erosion protection of ancient bridges.

[0021] Figure 5 This is a front structural diagram of a submerged lifting cofferdam structure used for erosion protection of ancient bridges, consisting of a hydraulic telescopic rod, a lifting column, and the lifting cofferdam itself.

[0022] In the diagram: 1. Fixed cofferdam; 2. Lifting cofferdam; 3. Connecting bolt; 4. Locking nut; 5. Structure; 6. Slide chute; 7. Connecting threaded hole; 8. Water level sensor; 9. Square hole; 10. Fixing bolt; 11. Support column; 12. Controller; 13. Hydraulic telescopic rod; 14. Lifting column; 15. Mounting bolt; 16. Fixing threaded groove; 17. Connecting rod; 18. Sliding block. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0024] The specific implementation of this utility model will be described in detail below with reference to specific embodiments.

[0025] like Figures 1-5 As shown in the figure, the present invention provides a submerged lifting cofferdam structure for erosion protection of ancient bridges, including two symmetrically arranged fixed cofferdams 1, and the two fixed cofferdams 1 are detachably connected together. The fixed cofferdam 1 is an L-shaped structure component.

[0026] A lifting cofferdam 2 is slidably connected to the surface of the fixed cofferdam 1. A slider 18 and a connecting rod 17 are installed on the surface of the lifting cofferdam 2. A groove 6 is opened on the surface of the fixed cofferdam 1. The lifting cofferdam 2 is slidably connected to the surface of the fixed cofferdam 1 through the cooperation of the slider 18 and the groove 6.

[0027] A hydraulic telescopic rod 13 is installed on the surface of the fixed cofferdam 1. One end of the hydraulic telescopic rod 13 is connected to a lifting column 14, and the lifting column 14 is fixedly connected to the lifting cofferdam 2.

[0028] The surface of the fixed cofferdam 1 is provided with support columns 11, and the surface of the support columns 11 is provided with square holes 9. The square holes 9 are provided with fixing bolts 10. The surface of the lifting cofferdam 2 is provided with several fixing threaded grooves 16. The hole diameters of the fixing bolts 10 and the fixing threaded grooves 16 are the same, and the outer diameter of the nut of the fixing bolts 10 is larger than the width of the square holes 9.

[0029] A water level sensor 8 is installed on the top of the side of the lifting cofferdam 2.

[0030] In one embodiment of this utility model, when using the device to protect the building 5 (i.e. the ancient bridge body) from erosion, two L-shaped fixed cofferdams 1 should first be fixedly installed on the front and rear sides of the building 5 in a way that the two planes face each other, so that the side surfaces of the fixed cofferdams 1 can fit tightly against the outer wall of the building 5, thereby forming a stable foundation for the enclosure structure.

[0031] A water level sensor 8 is installed on the top side of the lifting cofferdam 2, which can monitor the water level changes of the water area where the building 5 is located in real time and accurately. When the water level is detected to rise to a height that may pose a risk of scouring to the building 5, the water level sensor 8 transmits the collected data signal to the control system, which in turn controls the hydraulic telescopic rod 13 to start automatically. The hydraulic telescopic rod 13 drives the lifting column 14 connected to it to extend upward, thereby raising the entire lifting cofferdam 2 which is fixedly connected to it. During the lifting process, the slider 18 installed on the side of the lifting cofferdam 2 slides vertically in the groove 6 preset on the surface of the fixed cofferdam 1 to ensure that the lifting process of the lifting cofferdam 2 is stable and smooth, avoiding deviation or jamming, and finally steadily raising the lifting cofferdam 2 to the area on the side of the building 5 that is about to be scoured by the high water level, effectively blocking the water flow and reducing the impact of scouring.

[0032] To ensure that the lifting cofferdam 2 remains in a stable flow-blocking position after reaching the target height, the operator can also screw the fixing bolts 10 into the corresponding fixing threaded grooves 16 on the fixed cofferdam 1 to complete the mechanical locking operation, according to the actual water level requirements. The fixing bolts 10 pass through the square holes 9 provided on the support column 11 and precisely match the internal threads of the fixing threaded grooves 16. After being tightened to the correct position, the nuts of the fixing bolts 10 will firmly abut against the surface of the support column 11, thereby further limiting and reinforcing the lifting cofferdam 2, ensuring that it maintains good protective effect under high water level conditions, reducing the continuous load on the hydraulic telescopic rod 13, and improving the overall reliability and service life of the device.

[0033] The aforementioned technical solution makes the submerged lifting cofferdam structure, originally designed for erosion protection of ancient bridges, compact, responsive, and capable of automatically adjusting its height according to water level changes, achieving intelligent protection and strong adaptability. The guiding cooperation between the slider and the chute ensures a smooth and safe lifting process; mechanical locking with fixing bolts enhances the cofferdam's stability and extends the equipment's service life. The structure is submerged in water year-round, not affecting the appearance of the ancient bridge, and possesses good practicality and promotional value.

[0034] In this embodiment, a controller 12 is installed on the surface of the fixed cofferdam 1. This controller primarily receives real-time water level data from the water level sensor 8 and determines whether there is a risk of scouring based on a preset water level threshold. When the water level reaches the set standard, the controller 12 automatically issues a command to control the hydraulic telescopic rod 13 to start or retract, thereby driving the lifting column 14 to raise and lower the cofferdam 2, achieving dynamic protection and regulation of the water flow. To ensure long-term operational reliability, the controller 12, water level sensor 8, and hydraulic telescopic rod 13 are all waterproof, adaptable to long-term submersion environments, and possess excellent weather resistance and corrosion resistance, ensuring stable system operation in complex aquatic environments.

[0035] In this embodiment, the lifting cofferdam 2 is an L-shaped component. Its structural design facilitates close cooperation with the fixed cofferdam 1. The stable lifting and lowering of the cofferdam is achieved through the sliding connection between the slider 18 and the chute 6. The L-shaped structure can effectively cover the bottom and side wall areas of the building 5 (ancient bridge) that are susceptible to erosion, enhancing the protective coverage, while improving the structure's impact resistance and water flow guidance performance.

[0036] In this embodiment, both fixed cofferdams 1 have threaded holes 7 on their surfaces, and connecting bolts 3 are engaged inside the threaded holes 7. Locking nuts 4 are fitted onto the outer sides of the connecting bolts 3. This structure reliably connects two symmetrically arranged fixed cofferdams 1 into a single unit. The tightening action of the connecting bolts 3 creates a stable overall structure between the two cofferdams, thereby improving the impact resistance and structural strength of the entire cofferdam system. The locking nuts 4 prevent the connecting bolts 3 from loosening under long-term water flow impact, ensuring a stable and reliable connection. This connection structure also possesses excellent waterproof performance, making it suitable for installation environments where the system is submerged for extended periods, thus enhancing the overall system's durability and protective effect.

[0037] In this embodiment, the surface of the fixed cofferdam 1 is provided with threaded holes, and mounting bolts 15 are engaged inside the threaded holes. This structure is used to firmly install the fixed cofferdam 1 to the pier of the ancient bridge or the bottom of the riverbed. Through the tightening action of the mounting bolts 15, the fixed cofferdam 1 is stably positioned under the impact of water flow and the pressure of silt, preventing the device from shifting or tilting. The mounting bolts 15 are made of corrosion-resistant material and have good waterproof capabilities, allowing for stable use in long-term submersion and humid environments, ensuring the long-term reliable operation of the entire cofferdam structure and providing a stable guiding foundation for the raising and lowering cofferdam 2.

[0038] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A submerged lifting cofferdam structure for erosion protection of ancient bridges, comprising two symmetrically arranged fixed cofferdams (1), wherein the two fixed cofferdams (1) are detachably connected together, characterized in that, The surface of the fixed cofferdam (1) is slidably connected to the lifting cofferdam (2), and the surface of the fixed cofferdam (1) is equipped with a hydraulic telescopic rod (13). One end of the hydraulic telescopic rod (13) is connected to a lifting column (14), and the lifting column (14) is fixedly connected to the lifting cofferdam (2). The surface of the fixed cofferdam (1) is provided with a support column (11), and the surface of the support column (11) is provided with a square hole (9). The inside of the square hole (9) is provided with a fixing bolt (10). The surface of the lifting cofferdam (2) is provided with a plurality of fixing threaded grooves (16). A water level sensor (8) is installed on the top of the side of the lifting cofferdam (2).

2. The submerged lifting cofferdam structure for erosion protection of ancient bridges according to claim 1, characterized in that, The surface of the lifting cofferdam (2) is equipped with a slider (18) and a connecting rod (17), and the surface of the fixed cofferdam (1) is provided with a sliding groove (6). The lifting cofferdam (2) is slidably connected to the surface of the fixed cofferdam (1) through the cooperation of the slider (18) and the sliding groove (6).

3. The submerged lifting cofferdam structure for erosion protection of ancient bridges according to claim 1, characterized in that, The hole diameters of the fixing bolt (10) and the fixing thread groove (16) are the same, and the outer diameter of the nut of the fixing bolt (10) is greater than the width of the square hole (9).

4. A submerged lifting cofferdam structure for erosion protection of ancient bridges according to claim 1, characterized in that, A controller (12) is installed on the surface of the fixed cofferdam (1).

5. A submerged lifting cofferdam structure for erosion protection of ancient bridges according to claim 1, characterized in that, The lifting cofferdam (2) is an L-shaped structure component.

6. A submerged lifting cofferdam structure for erosion protection of ancient bridges according to claim 1, characterized in that, Both of the fixed cofferdams (1) have threaded holes (7) on their surfaces, and the threaded holes (7) are connected to connecting bolts (3) with locking nuts (4) on their outer sides.

7. A submerged lifting cofferdam structure for erosion protection of ancient bridges according to claim 1, characterized in that, The surface of the fixed cofferdam (1) is provided with a threaded hole for installation, and the threaded hole is internally connected with a mounting bolt (15).

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