Device for repairing dam body crack

Abstract

The utility model provides a device for repairing a dam body crack, which is characterized in that a composite technology of magnetic repairing and magnetic vacuum suction is used at the position of the dam crack, a large magnetic block and magnetic slurry are used for grouting repairing, and the magnetic vacuum suction is composed of a sealing cushion layer and a vacuum adsorption cover. According to the device, the magnetic slurry is subjected to vacuum suction through the magnetic vacuum suction cover, so that the internal state of the magnetic slurry at the crack is negative pressure, and the slurry is more easily injected into the crack; the magnetic field formed by the magnets fixed on the dam enhances the guidance of the magnetic slurry, the cracks are better supplemented, and the magnets are applied to the reinforcing steel bars, so that the magnetic slurry is more uniformly distributed in the magnetic mold.

Description

Technical Field

[0001] The invention relates to the field of repairing broken bodies and cracks in damaged dams, and in particular to a device for repairing cracks in dam bodies. Background Art

[0002] Stone masonry dams, concrete dams, and embankments on both sides of rivers are subject to the impact of turbulent water flow for a long time. Many cracks, broken stones, and broken cement joints are prone to appear on the surface of the dam bank. After the broken stones and cement are broken and washed away by floods, the bottom of the bank dam is prone to collapse, forming a vertical earth dam. The surface of the earth dam is easily soaked and softened, and collapse occurs. Water will erode from the surface into the interior of the earth dam, affecting the overall safety of the dam. This collapse is a vicious cycle. Therefore, after many broken bodies are formed on the surface of the dam, they need to be repaired quickly.

[0003] Filling the cracks in the dam with grouting can effectively prevent the project from being damaged and improve its durability and integrity. However, at present, traditional grouting technology cannot repair the cracks in the damaged parts of the dam well and quickly. Conventional repair methods will result in failure to achieve the expected repair effect. After using ordinary cement for repair, the cement will not be able to penetrate the cracks and form an integral structure with the bank dam, affecting the integrity and safety of the dam. Utility Model Content

[0004] This new type of grouting method is designed to solve the problem of reduced durability of dams during dam crack repair projects, as the cracks inside the dams are dense and complex and ordinary grouting cannot fill the cracks with fillers.

[0005] In order to achieve the above technical features, the technical solution adopted by this novel invention is:

[0006] A device for repairing cracks in a dam body comprises a magnetic mold, wherein the bottom sidewall of the magnetic mold is an elastic rubber pad, the top and surrounding sidewalls of the magnetic mold are steel plates, the top sidewall of the magnetic mold is provided with a plurality of grouting holes, and the surrounding sidewall steel plates of the magnetic mold are provided with a plurality of overflow holes.

[0007] The side wall of the magnetic mold is also connected with a plurality of magnetic steel bars, and a vacuum magnet device is also provided on one side of the bottom of the magnetic mold.

[0008] The elastic rubber pad on the side wall of the bottom of the magnetic mold is provided with a plurality of overflow holes.

[0009] Each side wall of the magnetic mold is equipped with a plurality of fixing screws.

[0010] Each magnetic steel bar is composed of a steel bar sheathed with a plurality of annular hollow magnets.

[0011] A sealing gasket is provided on one side of the vacuum magnet device, and the sealing gasket is sealed and connected to the vacuum cover, and a magnetic block is installed inside the vacuum cover.

[0012] The magnetic mold is also filled with magnetic slurry.

[0013] Preferably, the magnetic slurry is composed of concrete, magnetic powder, water reducer, epoxy resin, flocculant and curing agent materials.

[0014] The vacuum magnet device is provided with a plurality of wheels.

[0015] Compared with the existing technology, the beneficial effects of this new technology are:

[0016] 1. The magnetic slurry used in this new model is a mixture of concrete, magnetic powder, flocculant, water reducer, epoxy resin and curing agent. Adding multiple materials can improve the strength and durability of the crack after repair.

[0017] 2. This new type adopts a vacuum magnet device. After the magnetic slurry fills the broken body, it is convenient for the magnetic slurry to flow into the cracks, which can fill the cracks to a greater extent and improve the efficiency of crack grouting.

[0018] 3. The new type adopts an adaptive magnetic mold to repair the broken body. An elastic rubber pad is set on the adaptive magnetic mold, so that the slurry can be distributed more fully in the broken body to avoid the generation of gaps.

[0019] 4. When using adaptive magnetic molds for grouting, the outermost layer has only grouting holes, which provides a sealing effect. The magnetic slurry will not leak out easily, thereby improving the grouting efficiency and repair efficiency.

[0020] 5. The adaptive magnetic mold is equipped with fixing screws to fix the adaptive magnetic mold so that it will not fall off during the repair process and cause damage. The adaptive magnetic mold is also equipped with magnetic steel bars to guide the magnetic slurry inside the magnetic mold to be evenly distributed and improve the grouting efficiency at the crack.

[0021] 6. This novel dam magnetic structure is constructed at the damaged dam bank, making the broken pieces magnetic. This allows the subsequent injection of magnetic slurry to remain within the broken pieces, effectively filling the gaps. The device and operation method provided by this novel design are simple and convenient, and have broad engineering application implications. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a schematic diagram of the structure of the new adaptive magnetic mold;

[0023] Figure 2 This is a schematic diagram of the internal cross-sectional structure of the novel vacuum magnet device;

[0024] Figure 3 This is a schematic diagram of the cross-sectional structure of the grouting portion of the novel adaptive magnetic mold;

[0025] Figure numerals: magnetic mold 1, steel plate 2, fixing screw 3, overflow hole 4, grouting hole 5, grouting pipe 6, vacuum magnet device 7, vacuum cover 8, magnetic block 9, sealing gasket 10, magnetic slurry 11, grouting equipment 12, magnetic steel bar 13. DETAILED DESCRIPTION

[0026] Example 1

[0027] See also Figures 1 to 3 A device for repairing cracks in a dam body includes a magnetic mold 1, the bottom side wall of the magnetic mold 1 is an elastic rubber pad, the top and surrounding side walls of the magnetic mold 1 are steel plates 2, the top side wall of the magnetic mold 1 is provided with a plurality of grouting holes 5, and the steel plates 2 surrounding the side walls of the magnetic mold 1 are provided with a plurality of overflow holes 4.

[0028] A plurality of magnetic steel bars 13 are also connected through the side wall of the magnetic mold 1 , and a vacuum magnet device 7 is also provided on one side of the bottom of the magnetic mold 1 .

[0029] A plurality of overflow holes 4 are provided on the elastic rubber pad on the bottom side wall of the magnetic mold 1 .

[0030] Each side wall of the magnetic mold 1 is equipped with a plurality of fixing screws 3, which are used to fix the side wall.

[0031] Each magnetic steel bar 13 is composed of a steel bar sheathed with a plurality of annular hollow magnets.

[0032] The magnetic slurry 11 is composed of concrete, magnetic powder, water reducing agent, epoxy resin, flocculant and curing agent.

[0033] Among them, the preferred composition and mass ratio of the components of the magnetic slurry 11 are: magnetic powder is 25%-45%, water reducer is 2%-4%, epoxy resin is 2%-4%, flocculant is 4%-8%, curing agent is 3-8%, and the remainder is concrete with a water-cement ratio of 0.35-0.5.

[0034] Preferably, concrete (ash content): purchased from Beijing Zhongde Xinya Construction Technology Co., Ltd., model: UHPC ultra-high performance concrete;

[0035] Preferably, the magnetic powder is ferroferric oxide, and the particle size of the magnetic powder is 5-10 μm;

[0036] Preferably, flocculant: purchased from Qingdao Zhuonengda Construction Technology Co., Ltd., model: concrete anti-dispersion agent;

[0037] Preferably, water reducer: purchased from Sichuan Dongrun Baisheng New Materials Co., Ltd., model: polycarboxylate water reducer;

[0038] Preferably, epoxy resin: purchased from Guangzhou Guangcan Waterproof Material Co., Ltd., model: bisphenol A epoxy resin;

[0039] Preferably, the curing agent is purchased from Beijing Tong Concrete Strengthening Agent General Factory, model: Beijing Tong amino resin;

[0040] Preferably, the elastic rubber pad is purchased from Dongguan Shannai Plastic Products Co., Ltd., and the material model is fluororubber;

[0041] A sealing gasket 10 is provided on one side of the vacuum magnet device 7 , and the sealing gasket 10 is sealed and connected to the vacuum cover 8 , and a magnetic block 9 is installed inside the vacuum cover 8 .

[0042] The magnetic mold 1 is also filled with magnetic slurry 11 .

[0043] The vacuum magnet device 7 is provided with a plurality of wheels on one side of the sealing gasket 10 to facilitate the transportation of the vacuum magnet device 7. The overflow hole 4 facilitates the overflow of the magnetic slurry 11.

[0044] Preferably, the magnet is a hollow ring magnet that can be directly sleeved on the steel bar.

[0045] A method for using a device for repairing cracks in a dam body comprises the following steps:

[0046] S1: making an adaptive magnetic mold 1 according to the fragmented body and crack position, concave-convex surface, opening, and length;

[0047] S2: Install the vacuum magnet device 7 at the bottom of the fragmented body and the crack;

[0048] S3: Place the prepared magnetic mold 1 on the crushed body and the crack. The elastic rubber pad at the bottom of the magnetic mold 1 is connected to the crushed body and the crack. Use the fixing screws 3 to fix the magnetic mold 1 to prevent it from slipping. Then, the magnetic steel bar 13 is fixedly installed in the overflow hole 4 and connected to the side walls of the crushed body and the crack.

[0049] S4: After the magnetic mold 1 is placed, the grouting equipment 12 is connected to the grouting pipe 6, and the grouting pipe 6 is connected to the grouting hole 5 on the magnetic mold 1, and the magnetic slurry 11 is injected;

[0050] S5: After the crack is completely filled and solidified, the grouting pipe 6 and the grouting equipment 12 are removed.

[0051] The magnetic slurry 11 is forced by gravity to overflow from the overflow hole 4 of the magnetic mold 1. Using the principle of magnetic attraction, the magnetic slurry 11 then penetrates the interior of the fragmented body and cracks. Under the magnetic attraction of the magnetic rebar 13 and the vacuum magnet device 7, the magnetic slurry 11 fully penetrates the cracks. After solidification, the overall structure formed by the magnetic mold 1 perfectly matches the dam body, preventing floodwater from penetrating and scouring the cracks while also strengthening the foundation. One end of the magnetic rebar 13 penetrates the cracked dam body and connects to it. Another end of the magnetic rebar 13 penetrates the steel plate 2 and connects to the interior of the magnetic mold 1.

[0052] Magnetic steel bars 13 are set on the side walls of the steel plate 2 around the magnetic mold 1. The magnetic slurry 11 overflowing from the overflow hole 4 is attracted by the magnetic steel bars 13 and fills the cracks around it more quickly. The magnetic slurry 11 can more easily penetrate into the capillary structure of the cracks under the action of the magnetic field, so that the magnetic slurry 11 can be completely penetrated and embedded in the cracks.

Claims

1. A device for repairing cracks in a dam body, comprising a magnetic mold (1), characterized in that: The bottom side wall of the magnetic mold (1) is an elastic rubber pad, the top and surrounding side walls of the magnetic mold (1) are steel plates (2), the top side wall of the magnetic mold (1) is provided with a plurality of grouting holes (5), and the surrounding side wall steel plates (2) of the magnetic mold (1) are provided with a plurality of overflow holes (4). A plurality of magnetic steel bars (13) are also connected through the side wall of the magnetic mold (1), and a vacuum magnet device (7) is also provided on one side of the bottom of the magnetic mold (1).

2. The device for repairing dam cracks according to claim 1, characterized in that: A plurality of overflow holes (4) are provided on the elastic rubber pad on the bottom side wall of the magnetic mold (1).

3. The device for repairing cracks in a dam body according to claim 1, characterized in that: Each side wall of the magnetic mold (1) is equipped with a plurality of fixing screws (3).

4. The device for repairing cracks in a dam according to claim 1, characterized in that: Each magnetic steel bar (13) is composed of a steel bar sheathed with a plurality of annular hollow magnets.

5. The device for repairing dam cracks according to claim 1, characterized in that: A sealing gasket (10) is provided on one side of the vacuum magnet device (7), and the sealing gasket (10) is sealed and connected to the vacuum cover (8), and a magnetic block (9) is installed inside the vacuum cover (8).

6. The device for repairing dam cracks according to claim 1, characterized in that: The magnetic mold (1) is also filled with magnetic slurry (11).

7. The device for repairing cracks in a dam according to claim 1, characterized in that: The vacuum magnet device (7) is provided with a plurality of wheels.

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