Repair device and repair method for underwater concrete layers

Abstract

This invention provides a repair device and method for underwater concrete layers. The repair device includes: multiple anchor assemblies fastened to the underwater concrete layer; a first conduit, one end of which extends underwater and is located above the underwater concrete layer; and a second conduit, one end of which extends underwater and is also located above the underwater concrete layer, with the second conduit spaced apart from the first conduit in a first direction. The end of the first conduit extending underwater can be used to pour concrete onto the underwater concrete layer, and the end of the second conduit extending underwater can be used to apply an underwater protective agent to the concrete pouring area. Based on the technical solution of this invention, the anchor assemblies can anchor the subsequently poured underwater self-protecting concrete layer to the underwater concrete layer. This avoids the problems of high repair costs and unstable repair effects caused by altering the properties of the concrete itself to maintain bond strength in related technologies.

Description

Technical Field

[0001] This invention relates to the field of underwater concrete layer repair equipment, and particularly to a repair device and method for underwater concrete layers. Background Technology

[0002] Currently, defects such as cracks, scours, and honeycombing frequently occur in the concrete of hydropower station dams due to various factors including materials, environment, and operating conditions. To ensure the safe operation of the dam, these defects generally need to be repaired. For defects above the water level, since there are many materials to choose from and the processes are relatively mature, conventional methods such as grouting, pasting, embedding, and coating can be used for repair. However, for defects underwater, especially in deep-water areas, environmental factors make it difficult to maintain the bond strength between the repair mix and the old concrete over a long period.

[0003] In related technologies, the bond strength is maintained by modifying the properties of the concrete used for pouring. However, the bond strength decreases over time, and the repaired bond between the mixed concrete and the old concrete will still detach, resulting in poor repair stability and requiring repeated repairs. Ultimately, this leads to high repair costs. Summary of the Invention

[0004] To address the problems in the prior art, this application proposes a repair device and method for underwater concrete layers, which solves the problem of high repair costs.

[0005] The present invention provides a repair device for an underwater concrete layer, comprising: a plurality of anchor assemblies fastened to the underwater concrete layer; a first conduit, one end of which extends underwater and is located above the underwater concrete layer; and a second conduit, one end of which extends underwater and is located above the underwater concrete layer, the second conduit being spaced apart from the first conduit in a first direction; wherein the end of the first conduit extending underwater is capable of pouring concrete onto the underwater concrete layer, and the end of the second conduit extending underwater is capable of delivering an underwater protective agent to the concrete pouring area.

[0006] In one embodiment, the second conduit and the first conduit are sequentially arranged along the direction of water flow. Through this embodiment, the underwater protective agent can be better diffused into the concrete pouring area by utilizing the flow of water.

[0007] In one embodiment, the first conduit is a straight tube extending in a second direction, and / or the second conduit is a straight tube extending in a second direction.

[0008] In one embodiment, the anchor assembly includes: an anchor body, one end of which is fastened to an underwater concrete layer; an extension body, sleeved on the outer periphery of the anchor body, slidably connected to the anchor body; and an anchor head activation device disposed at the other end of the anchor body. The anchor head activation device, driven by an external force, can fasten the anchor body to the underwater concrete layer. In this embodiment, the anchor head activation device allows the anchor body to be embedded in the underwater concrete layer within the old concrete, and the extension body to be embedded in the repaired concrete. The anchor head activation device is activated by an external actuator, allowing the anchor body to be embedded in the old concrete underwater. Activating the anchor head activation device with an external actuator simplifies the construction process.

[0009] In one embodiment, the extension includes: a straight plate segment fitted around the outer periphery of the nail body and slidably connected to the nail body; and a bent plate segment connected to the straight plate segment, the bent plate segment having a U-shaped structure with its opening facing the underwater concrete layer, and a small circular hole at the center of the straight plate segment. By configuring the extension with both a straight plate segment and a bent plate segment, the contact area between the extension and the underwater self-protecting concrete is increased. This facilitates the bonding of the anchor assembly and the underwater self-protecting concrete into a unified whole, thereby meeting the bond strength requirements between the underwater self-protecting concrete and the underwater concrete layer.

[0010] In one embodiment, a nail-laying device is also included, which is used to apply external force to the nail-head actuation device to fasten the nail body to the underwater concrete layer.

[0011] In one embodiment, the anchoring device includes: a handle; and a drive assembly connected to one end of the handle; wherein pressing down the handle drives the drive assembly to apply external force to the anchor head activation device. Through this embodiment, the anchoring device can quickly and firmly install multiple anchor components at preset positions onto the underwater concrete layer, thus achieving rapid anchoring. This saves underwater construction time for the repair device and improves its efficiency.

[0012] In one embodiment, the drive assembly includes: an outer cylinder having a first opening and a second opening opposite to the first opening; a striking pin slidably passing through the first opening into the outer cylinder; a limiter disposed within the outer cylinder and connected to the first opening, the limiter limiting the sliding position of the striking pin; and a return spring sleeved on the outer periphery of the striking pin and positioned between the striking pin and the second opening; wherein, under the action of an external force, one end of the striking pin can sequentially pass through the limiter and the second opening to contact the anchor assembly and fasten the anchor body of the anchor assembly to the underwater concrete layer, at which time the return spring is compressed; when the striking pin is not subjected to external force, the return spring returns to push the striking pin back to its initial position.

[0013] In one embodiment, the flared opening is magnetic, and the flared opening can stably attract the anchor assembly.

[0014] In one embodiment, the second opening is a flared opening that is adapted to the nail head triggering device.

[0015] The present invention also provides a repair method, which uses the above-described repair device and includes the following steps:

[0016] Step 1: Evenly fasten multiple anchor bolt assemblies onto the underwater concrete layer;

[0017] Step 2: Apply an underwater protective agent to the pouring area on the underwater concrete layer through the second conduit;

[0018] Step 3: Pour concrete into the pouring area on the underwater concrete layer through the first conduit.

[0019] The above-mentioned technical features can be combined in various suitable ways or replaced by equivalent technical features, as long as the purpose of the present invention can be achieved.

[0020] The present invention provides a repair device and method for underwater concrete layers, which, compared with the prior art, have at least the following advantages:

[0021] By deploying multiple anchor components on an underwater concrete layer, and then pouring underwater self-protecting concrete on top, the anchor components secure the subsequently poured underwater self-protecting concrete layer to the existing underwater concrete layer. This ensures that the bond strength between the underwater concrete layer and the underwater self-protecting concrete layer remains stable over a long period. This avoids the problems of high repair costs and unstable repair results caused by altering the properties of the concrete itself to maintain bond strength in related technologies. Therefore, it saves costs, simplifies the construction process, and ultimately meets the repair requirements for underwater concrete layers, improving the safety and stability of the project. Attached Figure Description

[0022] The invention will now be described in more detail with reference to embodiments and the accompanying drawings.

[0023] Figure 1 A schematic diagram of the structure of the repair device for underwater concrete layers of the present invention is shown;

[0024] Figure 2 Showing Figure 1 A structural diagram of the anchor assembly (before use);

[0025] Figure 3 Showing Figure 1 A structural diagram of the anchor assembly (after use);

[0026] Figure 4 The diagram showing the connection relationship between the anchor assembly and the anchoring device of the present invention is illustrated.

[0027] Figure 5 Showing Figure 4 A schematic diagram of the structure of the fabric nailing equipment.

[0028] In the accompanying drawings, the same parts use the same reference numerals. The drawings are not to scale.

[0029] Figure label:

[0030] 10. Anchor assembly; 11. Nail body; 12. Extension body; 121. Straight plate section; 122. Bending plate section; 13. Nail head activation device; 20. First guide tube; 30. Second guide tube; 40. Nail placement device; 41. Handle; 42. Drive assembly; 421. Outer cylinder; 4211. First opening; 4212. Second opening; 422. Impact pin; 423. Limiter; 424. Return spring; 200. Underwater concrete layer; 300. Self-compacting concrete; 400. Underwater protective agent. Detailed Implementation

[0031] The invention will now be further described with reference to the accompanying drawings.

[0032] It should be noted that the concrete used for pouring in this application is self-compacting concrete 300. The repair device in this application is mainly used to repair the underwater concrete layer 200.

[0033] It should be noted that the underwater self-protecting concrete in this application includes self-compacting concrete 300 and underwater protective agent 400.

[0034] like Figure 1 As shown, the present invention provides a repair device for an underwater concrete layer 200, comprising a plurality of anchor assemblies 10, a first conduit 20, and a second conduit 30. The plurality of anchor assemblies 10 are fastened to the underwater concrete layer 200; one end of the first conduit 20 extends underwater and is located above the underwater concrete layer 200; one end of the second conduit 30 extends underwater and is located above the underwater concrete layer 200, and the second conduit 30 and the first conduit 20 are spaced apart in a first direction; the underwater end of the first conduit 20 can be used to pour concrete (self-compacting concrete 300) onto the underwater concrete layer 200, and the underwater end of the second conduit 30 can be used to apply an underwater protective agent 400 to the concrete pouring area.

[0035] In the above setup, multiple anchor components 10 are installed on the underwater concrete layer 200, and then underwater self-protecting concrete is poured onto the underwater concrete layer 200. The anchor components 10 can anchor the subsequently poured underwater self-protecting concrete layer to the underwater concrete layer 200. This ensures that the bond strength between the underwater concrete layer 200 and the underwater self-protecting concrete layer remains stable over a long period. This avoids the problems of high repair costs and unstable repair effects caused by changing the properties of the concrete itself to maintain bond strength in related technologies, thus saving costs and simplifying the construction process. Ultimately, it meets the repair requirements for the underwater concrete layer 200 and improves the safety and stability of the project.

[0036] In addition, underwater protective agent 400 is a non-toxic, colorless, and odorless liquid material that can form a flexible grid structure in water. This inhibits the loss of cementitious materials in underwater self-protecting concrete, thereby ensuring the performance of underwater self-protecting concrete and thus ensuring the repair function of underwater self-protecting concrete on underwater concrete layer 200.

[0037] Specifically, such as Figure 1 As shown, in one embodiment, the second conduit 30 and the first conduit 20 are sequentially arranged along the direction of water flow. The underwater protective agent 400 can be better diffused into the concrete pouring area by utilizing the flow of water.

[0038] Specifically, such as Figure 1 As shown, in one embodiment, a plurality of anchor assemblies 10 are spaced apart along a first direction.

[0039] Specifically, such as Figure 1 As shown, in one embodiment, the first conduit 20 is a straight tube extending along a second direction, and the second conduit 30 is a straight tube extending along a second direction.

[0040] Specifically, such as Figure 2 and Figure 3 As shown, in one embodiment, the anchor assembly 10 includes an anchor body 11, an extension 12, and an anchor head activation device 13. One end of the anchor body 11 is fastened to the underwater concrete layer 200; the extension 12 is sleeved on the outer periphery of the anchor body 11 and is slidably connected to the anchor body 11; the anchor head activation device 13 is disposed on the other end of the anchor body 11. Under the driving force of an external force, the anchor head activation device 13 can fasten the anchor body 11 to the underwater concrete layer 200.

[0041] In the above setup, the nail body 11 can be embedded in the underwater concrete layer 200 of the old concrete by the nail head activation device 13, and the extension body 12 can be embedded in the repair concrete. The nail head activation device 13 is activated by an external activator, which allows the nail body 11 to be embedded in the old concrete underwater. Activating the nail head activation device 13 by an external activator simplifies the construction process.

[0042] It should be noted that the nail head firing device 13 contains gunpowder, which is ignited by the firing pin 422, thereby causing the nail body 11 to be ejected.

[0043] Specifically, such as Figure 2 and Figure 3 As shown, in one embodiment, the extension 12 includes a straight plate segment 121 and a bent plate segment 122. The straight plate segment 121 is sleeved on the outer periphery of the nail body 11 and is slidably connected to the nail body 11; the bent plate segment 122 is connected to the straight plate segment 121, the bent plate segment 122 has a U-shaped structure, the opening of the bent plate segment 122 faces the underwater concrete layer 200, and a small circular hole is provided in the center of the straight plate segment 121.

[0044] In the above configuration, the extension body 12 is configured as a straight plate segment 121 and a bent plate segment 122, which increases the contact area between the extension body 12 and the underwater self-protecting concrete. This is more conducive to the anchor assembly 10 and the underwater self-protecting concrete forming a whole, thereby meeting the bonding strength requirements between the underwater self-protecting concrete and the underwater concrete layer 200.

[0045] Specifically, such as Figure 2 and Figure 3 As shown, in one embodiment, there are two bent plate segments 122, which are respectively arranged on both sides of the straight plate segment 121.

[0046] Specifically, such as Figure 4 and Figure 5 As shown, in one embodiment, the repair device further includes a nailing device 40 for applying external force to the nail head actuation device 13 to fasten the nail body 11 to the underwater concrete layer 200.

[0047] In the above configuration, the anchoring device 40 can quickly and firmly install multiple anchor components 10 onto the underwater concrete layer 200 at preset positions, thus achieving the function of rapid anchoring. This saves underwater construction time for the repair device and improves its underwater construction efficiency.

[0048] Specifically, such as Figure 4 and Figure 5 As shown, in one embodiment, the nail-laying device 40 includes a handle 41 and a drive assembly 42. The drive assembly 42 is connected to one end of the handle 41, and pressing down the handle 41 can drive the drive assembly 42 to apply external force to the nail head triggering device 13.

[0049] In the above setup, the construction worker only needs to press the handle 41 up or down on the water surface to drive the drive assembly 42 to apply external force to the nail head triggering device 13, thereby nailing the nail body 11 firmly to the underwater concrete layer 200. This improves the ease of use of the nailing device 40.

[0050] It should be noted that the other end of the handle 41 extends out of the water so that on-site construction personnel on the water surface can hold and operate it.

[0051] Specifically, such as Figure 4 Hehe Figure 5 As shown, in one embodiment, the drive assembly 42 includes an outer cylinder 421, a striking pin 422, a limiter 423, and a return spring 424. The outer cylinder 421 has a first opening 4211 and a second opening 4212 opposite to the first opening 4211. The striking pin 422 slides through the first opening 4211 within the outer cylinder 421. The limiter 423 is disposed within the outer cylinder 421 and connected to the first opening 4211, limiting the sliding position of the striking pin 422. The return spring 424 is sleeved on the outer periphery of the striking pin 422 and is positioned between the striking pin 422 and the second opening. Under the action of external force, one end of the firing pin 422 can pass through the limiter 423 and the second opening in sequence to contact the anchor assembly 10 and fasten the nail body 11 of the anchor assembly 10 to the underwater concrete layer 200. At this time, the return spring 424 is compressed. When the firing pin 422 is not subjected to external force, the return spring 424 returns to push the firing pin 422 back to the initial position.

[0052] Specifically, such as Figure 5 As shown, in one embodiment, the second opening is a flared opening, which is adapted to the nail head triggering device 13.

[0053] In the above configuration, the nail head actuation device 13 is fitted into the flared opening so that one end of the firing pin 422 can pass through the limiter 423 and the second opening in sequence under the action of external force and contact the nail head actuation device 13, thus pressing the nail body 11 of the anchor assembly 10 against the underwater concrete layer 200. This ensures that the nail laying device 40 can achieve the function of quickly laying nails on the anchor assembly 10.

[0054] The present invention also provides a repair method, which employs the above-described repair device and includes the following steps:

[0055] Step 1: Evenly fasten multiple anchor bolt assemblies onto the underwater concrete layer;

[0056] Step 2: Apply an underwater protective agent to the pouring area on the underwater concrete layer through the second conduit;

[0057] Step 3: Pour concrete into the pouring area on the underwater concrete layer through the first conduit.

[0058] The following describes a more specific embodiment of a repair method according to this application:

[0059] This invention provides a repair method based on underwater anchor placement to improve the bond strength of repaired concrete, which includes the following steps:

[0060] First, evenly distribute the anchor components 10 on the old concrete surface that needs to be repaired.

[0061] The height of the nail body 11 of the anchor component 10 exposed above the surface of the old concrete (underwater concrete layer 200) should be 10% to 90% of the thickness of the repair concrete (underwater self-protecting concrete).

[0062] Then, repair concrete is poured onto the old concrete surface where the anchor components 10 have been evenly distributed to cover the anchor components 10.

[0063] Specifically, the repair concrete should preferably be underwater self-protecting concrete. First, an appropriate concentration of underwater protective agent 400 is released into the water through the second conduit 30, and then the underwater self-protecting concrete is poured through the first conduit 20. This arrangement inhibits the dispersion of the underwater self-protecting concrete in the water and achieves underwater self-leveling, fully covering and encapsulating the anchor assembly 10, thereby enhancing the bond strength.

[0064] According to the technical effects of the specific embodiments of the present invention, by arranging multiple anchor components on the underwater concrete layer and then pouring underwater self-protecting concrete on the underwater concrete layer, the anchor components can anchor the subsequently poured underwater self-protecting concrete layer together with the underwater concrete layer. This ensures that the bond strength between the underwater concrete layer and the underwater self-protecting concrete layer remains stable over a long period. This avoids the problems of high repair costs and unstable repair effects caused by altering the properties of the concrete itself to maintain bond strength in related technologies, thus saving costs and simplifying the construction process. Furthermore, it meets the repair requirements for underwater concrete layers and improves the safety and stability of the project. In addition, the underwater protective agent is a non-toxic, colorless, and odorless liquid material that can form a flexible mesh structure in water, thereby inhibiting the loss of cementitious materials in the underwater self-protecting concrete, ensuring the performance of the underwater self-protecting concrete, and thus ensuring the repair function of the underwater concrete layer.

[0065] In the description of this invention, it should be understood that the terms "upper", "lower", "bottom", "top", "front", "rear", "inner", "outer", "left", "right", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0066] While the invention has been described herein with reference to specific embodiments, it should be understood that these embodiments are merely examples of the principles and applications of the invention. Therefore, it should be understood that many modifications can be made to the exemplary embodiments, and other arrangements can be designed without departing from the spirit and scope of the invention as defined by the appended claims. It should be understood that different dependent claims and features described herein can be combined in ways different from those described in the original claims. It is also understood that features described in conjunction with individual embodiments can be used in other described embodiments.

Claims

1. A repair device for underwater concrete layers, characterized in that, include: Multiple anchor bolt assemblies are fastened to the underwater concrete layer; as well as The first conduit has one end extending underwater and is located above the underwater concrete layer; as well as The second conduit has one end extending underwater and is located above the underwater concrete layer. The second conduit and the first conduit are spaced apart in the first direction. The first conduit can be used to pour concrete into the underwater concrete layer at one end, and the second conduit can be used to deliver an underwater protective agent to the concrete pouring area at one end. The anchor assembly includes: The nail body, one end of which is fastened to the underwater concrete layer; and An extension body, fitted onto the outer periphery of the nail body, is slidably connected to the nail body, and the extension body comprises: A straight section is fitted onto the outer periphery of the nail body and is slidably connected to the nail body; and A bent plate segment, connected to the straight plate segment, the bent plate segment having a U-shaped structure, the opening of the bent plate segment facing the underwater concrete layer, and a small circular hole provided at the center of the straight plate segment; and A nail head triggering device is located at the other end of the nail body; The nail head triggering device can fasten the nail body to the underwater concrete layer under the driving force of external force; It also includes a nail-laying device for applying the external force to the nail head triggering device to fasten the nail body to the underwater concrete layer; The nail-laying device includes: Handle; and A drive assembly is connected to one end of the handle; Pressing down the handle can drive the drive assembly to apply the external force to the nail head triggering device.

2. The repair device for underwater concrete layers according to claim 1, characterized in that, The second conduit and the first conduit are arranged sequentially along the direction of water flow.

3. The repair device for underwater concrete layers according to claim 2, characterized in that, The first conduit is a straight tube, and the first conduit extends along a second direction, and / or the second conduit is a straight tube, and the second conduit extends along a second direction.

4. The repair device for underwater concrete layers according to claim 1, characterized in that, The driving component includes: The outer cylinder has a first opening and a second opening opposite to the first opening; and The firing pin slides through the first opening and is inserted into the outer cylinder; and A limiter, disposed within the outer cylinder and connected to the first opening, limits the sliding position of the firing pin; and A return spring is sleeved on the outer periphery of the firing pin and is defined between the firing pin and the second opening; Under the action of the external force, one end of the striking pin can pass through the limiter and the second opening in sequence to contact the anchor assembly and fasten the nail body of the anchor assembly to the underwater concrete layer. At this time, the return spring is compressed. When the striking pin is not subjected to the external force, the return spring returns to push the striking pin back to the initial position.

5. The repair device for underwater concrete layers according to claim 4, characterized in that, The second opening is a flared mouth, which is adapted to the nail head triggering device.

6. The repair device for underwater concrete layers according to claim 5, characterized in that, The flared opening is magnetic and can stably attract the anchor assembly.

7. A repair method, characterized in that, The repair method employs the repair apparatus according to any one of claims 1 to 6, and includes the following steps: Step 1: Evenly fasten multiple anchor bolt assemblies onto the underwater concrete layer; Step 2: Apply an underwater protective agent to the pouring area on the underwater concrete layer through the second conduit; Step 3: Pour concrete into the pouring area on the underwater concrete layer through the first conduit.

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