Dam body drainage fin repairing and reinforcing device

Abstract

The utility model discloses a kind of dam body drainage prism repair reinforcing devices, including central flow guide pipe, the central flow guide pipe is set to the repair area center along drainage prism axial direction, its outer periphery is connected with multiple annular support sheets along radial direction, the annular support sheet is connected with coaxially arranged layered filter cylinder away from one end of central flow guide pipe, the both ends outside of layered filter cylinder is equipped with positioning fixed component, and the both ends of central flow guide pipe extend to dam body outside and install end sealing flange. The dam body drainage prism repair reinforcing device simple structure can realize in situ repair and overall strengthening to drainage prism, effectively promote the structural integrity and stability after repair, enhance the long-term reliability of drainage function.

Description

Technical Field

[0001] This utility model relates to the field of water conservancy engineering technology, specifically to a device for repairing and reinforcing the drainage prism of a dam. Background Technology

[0002] In water conservancy projects, earth-rock dams are widely used due to their strong adaptability and relatively low cost. Among these dam structures, the drainage prism, as a key component for seepage control within the dam body, plays a crucial role in collecting and draining seepage water, lowering the phreatic line, and protecting the dam's soil from seepage damage. Therefore, the integrity of the drainage prism is vital for maintaining the long-term safe operation of the dam.

[0003] Currently, for drainage prisms that have become blocked, collapsed, or have degraded drainage performance, conventional repair methods often involve excavation and backfilling or the addition of slope-adhering drainage bodies. This not only involves a large amount of work and a long construction period, but also lacks a device that can perform in-situ repair and structural reinforcement of the original drainage prism from inside the dam body. As a result, the repaired drainage prism has poor integrity and is not tightly integrated with the original structure. During subsequent operation, it is prone to local deformation or functional failure due to uneven stress or water erosion, making it difficult to achieve a long-term stable and reliable reinforcement effect. Utility Model Content

[0004] The purpose of this utility model is to provide a dam drainage prism repair and reinforcement device to solve the problems mentioned in the background art, such as the large amount of engineering work, long construction period, lack of device for in-situ repair and structural reinforcement of drainage prisms inside the dam, resulting in poor integrity, loose bonding and insufficient long-term stability after repair.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a dam drainage prism repair and reinforcement device, comprising a central guide pipe, wherein the central guide pipe is arranged along the axial direction of the drainage prism at the center of the repair area, and a plurality of circumferential support plates are radially connected to its outer periphery. One end of the circumferential support plate away from the central guide pipe is connected to a coaxially arranged layered filter cylinder, and positioning and fixing components are provided on the outer sides of both ends of the layered filter cylinder. Furthermore, both ends of the central guide pipe extend to the outside of the dam body and are equipped with end sealing flanges.

[0006] Preferably, the central guide pipe is a hollow circular steel pipe with staggered water guide holes on its pipe wall, and a detachable sludge removal channel cover is provided on the top of the central guide pipe.

[0007] Preferably, the circumferential support plate is a fan-shaped steel plate with equal spacing, numbering 6-8 pieces, and is spaced apart along the central guide pipe. The inner end of the circumferential support plate is welded to the outer wall of the central guide pipe, and the outer end of the circumferential support plate is embedded in the arc-shaped connecting groove on the outer wall of the layered filter cylinder.

[0008] Preferably, the layered filter cylinder comprises, from the inside out, a fine sand filling layer, a non-woven geotextile layer, a gravel layer, and a wire mesh sheath, and is a segmented cylindrical structure with adjacent segments connected by a socket joint.

[0009] Preferably, the positioning and fixing component includes a U-shaped clamp and a connecting ear plate. The U-shaped clamp is tightened around the outer periphery of the end of the layered filter cylinder, and the connecting ear plate is fixed to both ends of the U-shaped clamp and is equipped with adjusting bolts.

[0010] Preferably, the end sealing flange is a grooved metal flange with a rubber sealing ring embedded on its inner side and an interface thread that matches the external drainage pipe on its outer side.

[0011] Compared with existing technologies, the beneficial effects of this utility model are as follows: The dam drainage prism repair and reinforcement device has a simple structure, enabling in-situ repair and overall reinforcement of the drainage prism, effectively improving the structural integrity and stability after repair, and enhancing the long-term reliability of the drainage function. Through the coordinated structural design of the central guide pipe, circumferential support plates, and layered filter cylinders, the device achieves orderly drainage of seepage and effective back-filtration of the soil. Anchoring the two ends of the layered filter cylinders with positioning and fixing components enhances the tightness of the connection between the device and the original dam body. The sealed connection between the end sealing flanges and the central guide pipe ensures the stability and durability of the drainage outlet. The overall structure is easy to install and operates safely and reliably for a long time. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of a dam drainage prism repair and reinforcement device according to the present invention; Figure 2 This is a schematic diagram of the layered filter cylinder and positioning and fixing components of a dam drainage prism repair and reinforcement device according to the present invention; Figure 3 This is a schematic diagram of the external structure of the central guide pipe of a dam drainage prism repair and reinforcement device according to the present invention.

[0013] In the diagram: 1. Central guide pipe; 11. Water guide hole; 12. Dredging channel cover plate; 2. Circumferential support plate; 3. Layered filter cylinder; 31. Fine sand filling layer; 32. Non-woven geotextile layer; 33. Crushed stone layer; 34. Wire mesh sheath; 4. Positioning and fixing components; 41. U-shaped clamp; 42. Connecting ear plate; 5. End sealing flange. Detailed Implementation

[0014] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0015] Please see Figure 1-3This utility model provides a technical solution: a dam drainage prism repair and reinforcement device, including a central diversion pipe 1, which is arranged axially along the drainage prism at the center of the repair area. Multiple circumferential support plates 2 are radially connected to the central diversion pipe 1. A coaxially arranged layered filter cylinder 3 is connected to one end of each circumferential support plate 2 away from the central diversion pipe 1. Positioning and fixing components 4 are provided on the outer sides of both ends of the layered filter cylinder 3. Both ends of the central diversion pipe 1 extend to the outside of the dam body and are equipped with end sealing flanges 5. This structure guides seepage water into the pipe and discharges it axially by placing the central diversion pipe 1 at the center of the repair trench. The multiple circumferential support plates 2 extend radially from the central diversion pipe 1, uniformly transmitting the surrounding earth pressure and supporting the layered filter cylinder 3, thus stabilizing it. Nested within the original drainage prism, a continuous filtration channel is formed. The layered filter cylinder 3, connected by the circumferential support plate 2, remains coaxial with the central guide pipe 1, effectively intercepting soil particles and preventing soil loss around the pipe. Simultaneously, the positioning and fixing component 4 is securely fastened inside the dam body, ensuring the entire device does not shift or loosen under seepage. The two ends of the central guide pipe 1 extend outside the dam body and connect to the end sealing flange 5, achieving reliable outflow of the internal drainage system and sealed connection with the external pipeline. The coordinated operation of all components ensures a tight bond between the repaired structure and the original dam body, significantly improving overall integrity and stress continuity. This effectively avoids localized deformation and functional failure caused by loose connections, uneven stress, or water erosion, solving the problem of existing technologies lacking the ability to effectively filter within the dam body. The integrated device for in-situ repair and structural reinforcement addresses the technical challenge of poor stability and insufficient durability after repair. The central diversion pipe 1 is a hollow circular steel pipe with staggered water guide holes 11 on its wall. A removable sludge removal channel cover 12 is located at the top of the central diversion pipe 1. This structure allows seepage water to evenly enter the interior of the central diversion pipe 1 through the water guide holes 11, achieving efficient water collection. Simultaneously, the staggered distribution of the water guide holes 11 avoids stress concentration and enhances the structural strength of the pipe. When the central diversion pipe 1 requires maintenance, sludge removal can be performed directly by removing the sludge removal channel cover 12, enabling convenient maintenance without disassembling the entire structure. This ensures the long-term unobstructed flow and operational reliability of the drainage system. The circumferential support plates 2 are equidistantly distributed fan-shaped steel plates. The system comprises 6-8 circumferential support plates 2, spaced axially along the central guide pipe 1. The inner end of each circumferential support plate 2 is welded to the outer wall of the central guide pipe 1, while the outer end of the circumferential support plate 2 is embedded in the arc-shaped connecting groove on the outer wall of the layered filter cylinder 3. This structure allows the circumferential support plate 2 to withstand the radial pressure from the layered filter cylinder 3 through its secure welding to the central guide pipe 1, uniformly transferring the external soil load to the central guide pipe 1. Simultaneously, the outer end embedded in the arc-shaped connecting groove on the outer wall of the layered filter cylinder 3 effectively limits the radial deformation and axial displacement of the filter cylinder, preventing loosening or displacement under seepage. This ensures the geometric stability of the entire drainage structure and the coordinated stress distribution among its components, significantly improving the overall rigidity of the repair device and its long-term structural reliability.The layered filter cylinder 3 comprises, from the inside out, a fine sand filling layer 31, a non-woven geotextile layer 32, a crushed stone layer 33, and a wire mesh sheath 34. The overall structure is a segmented, assembled cylindrical structure, with adjacent segments connected by a socket joint. In this structure, water seepage first undergoes preliminary filtration through the fine sand filling layer 31, effectively preventing fine soil particles from entering the interior. Subsequently, precise reverse filtration is achieved through the non-woven geotextile layer 32, preventing soil loss. The crushed stone layer 33 provides a stable drainage channel and enhances the structure's compressive strength. The outer wire mesh sheath... 34 effectively constrain the entire structure, resisting surrounding earth pressure and preventing deformation and damage. The segmented cylindrical structure, combined with socket-type interface connections, facilitates segmented installation in narrow repair trenches while ensuring axial continuity and interface sealing. This allows the layered filter cylinder 3 to maintain its complete function under complex working conditions, ensuring long-term stable reverse filtration and drainage performance. The positioning and fixing component 4 includes a U-shaped clamp 41 and a connecting ear plate 42. The U-shaped clamp 41 tightens the outer periphery of the end of the layered filter cylinder 3, and the connecting ear plate 42 is fixed to the U-shaped clamp 41. The U-shaped clamp 41 is equipped with adjusting bolts at both ends. This structure provides radial constraint by tightening the outer periphery of the layered filter cylinder 3, preventing loosening or displacement under seepage. The connecting ear plate 42, in conjunction with the adjusting bolts, applies pre-tightening force to the U-shaped clamp 41 and securely connects it to the anchorage embedded in the dam body, achieving reliable anchoring at both ends of the device. This effectively resists axial thrust and overall slippage, ensuring a tight bond between the repaired structure and the original dam body, significantly improving the installation stability and structural integrity of the device during long-term operation. The end sealing flange 5 is a grooved metal flange with a rubber sealing ring embedded inside and an interface thread matching the external drainage pipe on the outside. This structure allows the end sealing flange 5 to fit tightly with the end of the central guide pipe 1 through its inner rubber sealing ring, effectively preventing seepage from leaking out along the pipe opening and ensuring the sealing of the drainage system. Simultaneously, the interface thread on the outside of the flange can be quickly screwed onto the external drainage pipe, achieving a stable and reliable water outlet connection, facilitating system integration and subsequent maintenance.

[0016] Working principle: When using this dam drainage prism repair and reinforcement device, firstly, a repair groove matching the device outline is excavated in the damaged area of ​​the dam drainage prism. Then, the segmented layered filter cylinder 3 is hoisted into place section by section. The arc-shaped connecting groove on its inner wall is aligned with the outer end of the circumferential support plate 2 installed on the outer periphery of the central diversion pipe 1 and embedded and fixed, completing the assembly of the central diversion pipe 1 and the layered filter cylinder 3. Next, the outer periphery of both ends of the layered filter cylinder 3 is tightened by U-shaped clamps 41, and the connecting ear plate 42 is connected to the anchor seat pre-embedded in the dam body on both sides of the repair groove. The pre-tightening force is applied by adjusting bolts to achieve the anchoring position of both ends of the device. Then, the two ends of the central diversion pipe 1 are extended axially to the outside of the dam body, the end sealing flange 5 is installed, and it is connected to the external drainage pipe through the interface thread on its outer side. At the same time, the sludge removal channel cover plate 12 at the top of the central diversion pipe 1 is reset and sealed. Finally, the gap between the repair groove and the outer periphery of the device is backfilled, so that the entire device is embedded in the dam body, thus completing a series of tasks.

[0017] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A dam drainage prism repair and reinforcement device, comprising a central diversion pipe (1), characterized in that: The central guide pipe (1) is set at the center of the repair area along the axial direction of the drainage prism. Multiple circumferential support plates (2) are connected radially around its outer periphery. The end of the circumferential support plate (2) away from the central guide pipe (1) is connected to a coaxially arranged layered filter cylinder (3). The outer sides of both ends of the layered filter cylinder (3) are provided with positioning and fixing components (4). Both ends of the central guide pipe (1) extend to the outside of the dam body and are equipped with end sealing flanges (5).

2. The dam body drainage prism repair and reinforcement device according to claim 1, characterized in that: The central guide pipe (1) is a hollow circular steel pipe with staggered water guide holes (11) on its pipe wall. The top of the central guide pipe (1) is provided with a detachable dredging channel cover plate (12).

3. The dam drainage prism repair and reinforcement device according to claim 1, characterized in that: The circumferential support plate (2) is a fan-shaped steel plate with equal spacing, numbering 6-8 pieces, and is arranged axially along the central guide pipe (1). The inner end of the circumferential support plate (2) is welded to the outer wall of the central guide pipe (1), and the outer end of the circumferential support plate (2) is embedded in the arc-shaped connecting groove on the outer wall of the layered filter cylinder (3).

4. The dam body drainage prism repair and reinforcement device according to claim 1, characterized in that: The layered filter cylinder (3) consists of a fine sand filling layer (31), a non-woven geotextile layer (32), a crushed stone layer (33), and a wire mesh sheath (34) from the inside out. The whole structure is a segmented cylindrical structure with socket-type interfaces connecting adjacent segments.

5. The dam body drainage prism repair and reinforcement device according to claim 1, characterized in that: The positioning and fixing component (4) includes a U-shaped clamp (41) and a connecting ear plate (42). The U-shaped clamp (41) clamps the outer periphery of the end of the layered filter cylinder (3). The connecting ear plate (42) is fixed to both ends of the U-shaped clamp (41) and is equipped with adjusting bolts.

6. The dam body drainage prism repair and reinforcement device according to claim 1, characterized in that: The end sealing flange (5) is a grooved metal flange with a rubber sealing ring embedded on its inner side and an interface thread that matches the external drainage pipe on its outer side.

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