Leakage point repairing device for concrete faced rockfill dam

Abstract

The utility model discloses a concrete faced rockfill dam leakage point repairing device which comprises a dam body, a plurality of grouting holes and a plurality of grouting holes. The frame body at least comprises two layers of reinforcing meshes, and a composite geomembrane is arranged between the two layers of reinforcing meshes, so that the two layers of reinforcing meshes and the composite geomembrane jointly form a primary water-resisting layer; the water stopping layer is arranged on the side, close to the dam body, of the frame body, so that when the repairing device is installed on the dam body, the water stopping layer covers the leakage point and the periphery of the grouting hole; the grouting pipes are arranged on the frame body corresponding to the grouting holes and are used for grouting the leakage points; and the balancing weight is arranged on the frame body corresponding to the position of the leakage point. The concrete faced rockfill dam leakage point repairing device can repair the leakage point of the concrete faced rockfill dam underwater, and is good in grouting stability and high in repairing efficiency.

Description

Technical Field

[0001] The utility model relates to the technical field of water conservancy projects, in particular to a repair device for leakage points of a concrete face rockfill dam. Background Art

[0002] A concrete face rockfill dam includes a concrete face slab, a cushion zone, a transition zone, a main rockfill zone, a secondary rockfill zone and an anti-seepage system. This type of dam is prone to damage such as piping caused by uneven settlement of the dam body, thereby damaging the concrete face slab and the anti-seepage system, and may cause serious safety accidents.

[0003] When leakage of the dam body is detected, it must be repaired promptly. Since the slope ratio of the dam slope is usually set between 1:1.5 and 1:1.7, the construction team needs to operate on the slope, which increases the construction difficulty and safety risks. Although only part of the dam body is damaged, the rockfill dam still needs to maintain normal operation. To implement the repair, the water level usually needs to be lowered below the damaged area, and repairs are carried out using scaffolding built manually. Although this method is effective, it consumes a large amount of water resources and causes economic losses. At the same time, the prerequisite for construction is that the reservoir water level must be lowered below the repair area, and the construction cost is relatively high.

[0004] In view of this, it is necessary to design a repair device for leakage points of a concrete face rockfill dam to solve the above problems. Summary of the Utility Model

[0005] The purpose of the utility model is to provide a repair device for leakage points of a concrete face rockfill dam that can repair leakage points underwater and effectively improve the repair efficiency of underwater leakage points.

[0006] To achieve the above purpose, the utility model provides the following technical solutions:

[0007] A repair device for leakage points of a concrete face rockfill dam, comprising:

[0008] A dam body, on which a number of grouting holes are provided;

[0009] A frame body, at least including two layers of steel wire meshes, and a composite geomembrane is arranged between the two layers of steel wire meshes, so that the two layers of steel wire meshes and the composite geomembrane jointly form a preliminary water isolation layer;

[0010] A water stop layer, arranged on the side of the frame body close to the dam body, so that when the repair device is installed on the dam body, the water stop layer covers the leakage point and the periphery of the grouting holes;

[0011] Grouting pipes, arranged on the frame body corresponding to the grouting holes, for grouting the leakage points;

[0012] Counterweight blocks, arranged on the frame body corresponding to the positions of the leakage points.

[0013] As a further improvement of the present utility model, a one-way valve is provided on the grouting pipe.

[0014] As a further improvement of the present utility model, a fixing member for fixing the frame body on the dam body is further provided on the frame body.

[0015] As a further improvement of the present utility model, the fixing member is arranged on the steel mesh on the side close to the dam body, and includes a fixing ring arranged along the circumference of the steel mesh and a fastening member adapted to the fixing ring.

[0016] As a further improvement of the present utility model, the mass of the counterweight is 50 - 200 kg.

[0017] As a further improvement of the present utility model, the water stop layer is a water stop rubber layer with a thickness of 5 - 10 cm.

[0018] As a further improvement of the present utility model, the steel mesh on the side close to the dam body is composed of steel bars with a diameter of 6 - 8 mm, and the horizontal and vertical spacings of the steel bars are both 3 - 5 cm.

[0019] As a further improvement of the present utility model, the steel mesh on the side far from the dam body is composed of steel bars with a diameter of 4 - 8 mm, and the horizontal and vertical spacings of the steel bars are both 2 - 4 cm.

[0020] As a further improvement of the present utility model, the grouting holes are arranged around the leakage point.

[0021] As a further improvement of the present utility model, through holes for the grouting pipe to pass through are provided on both the preliminary water isolation layer and the water stop layer.

[0022] The beneficial effects of the present utility model are as follows:

[0023] 1. The present utility model forms a preliminary water isolation layer through the steel mesh and the composite geomembrane, and a water stop layer is provided on the side of the preliminary water isolation layer close to the dam body for secondary isolation of water bodies, which can meet the water stop requirement when the repair device repairs the leakage point and ensure the grouting stability at the same time.

[0024] 2. The present utility model improves the overall weight of the repair device by arranging counterweights at the positions of the preliminary water isolation layer corresponding to the leakage points, so as to ensure the stability of the repair device during grouting.

[0025] 3. The present utility model can repair the leakage points of the concrete face rockfill dam underwater with high repair efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic structural diagram of the leakage point repair device for the concrete face rockfill dam of the present utility model.

[0027] Figure 2Schematic diagram of the leakage point repair device for the concrete face rockfill dam located on the dam body.

[0028] Figure 3 Schematic diagram of the main reinforcement mesh structure.

[0029] Figure 4 Schematic diagram of the ribbed reinforcement mesh structure.

[0030] Figure 5 Schematic diagram of the structure of the composite geomembrane.

[0031] Figure 6 Schematic diagram of the installation of the leakage point repair device for the concrete face rockfill dam.

[0032] Reference numerals

[0033] 10. Dam body; 11. Grouting hole; 12. Leakage point; 20. Frame body; 21. Main reinforcement mesh; 211. Fixed ring; 22. First ribbed reinforcement mesh; 23. Composite geomembrane; 24. Second ribbed reinforcement mesh; 25. Through hole; 30. Water stop layer; 40. Grouting pipe; 50. Counterweight; 60. Crane ship; 70. Towing equipment. Detailed implementation manners

[0034] In order to make the objectives, technical solutions and advantages of the present utility model clearer, the present utility model will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0035] Here, it should also be noted that in order to avoid obscuring the present utility model due to unnecessary details, only the structures and / or processing steps closely related to the solution of the present utility model are shown in the drawings, while other details less related to the present utility model are omitted.

[0036] In addition, it should also be noted that the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or further includes elements inherent to such process, method, article or device.

[0037] Please refer to Figure 1 - Figure 2 As shown, the present utility model provides a leakage point repair device for a concrete face rockfill dam, including:

[0038] A dam body 10, on which a number of grouting holes 11 are provided;

[0039] A frame body 20, including at least two layers of steel bar meshes, such that the two layers of steel bar meshes and the composite geomembrane 23 together form a preliminary water barrier layer;

[0040] The water stop layer 30 is arranged on the side of the frame body 20 close to the dam body 10, so that when the repair device is installed on the dam body 10, the water stop layer 30 covers the leakage point 12 and the periphery of the grouting hole 11;

[0041] The grouting pipe 40 is arranged on the frame body 20 corresponding to the grouting hole 11 and is used for grouting the leakage point 12;

[0042] The counterweight block 50 is arranged on the frame body 20 corresponding to the position of the leakage point 12.

[0043] Exemplarily, along the direction away from the dam body 10, the frame body 20 includes a main reinforcement mesh 21, a first rib reinforcement mesh 22 and a second rib reinforcement mesh 24 which are connected in sequence, and both the main reinforcement mesh 21 and the rib reinforcement meshes are built by stainless steel bars. Among them, the main reinforcement mesh is the main part of the frame body; the composite geomembrane 23 is arranged between the first rib reinforcement mesh 22 and the second rib reinforcement mesh 24 to fix the composite geomembrane 23 by the first rib reinforcement mesh 22 and the second rib reinforcement mesh 24. The four-layer structure setting of the main reinforcement mesh 21, the first rib reinforcement mesh 22, the composite geomembrane 23 and the second rib reinforcement mesh 24 can better preliminarily isolate the water body and provide a relatively stable environment. Furthermore, in cooperation with the secondary isolation design of the water stop layer 30, it fully meets the water stop requirement when the repair device repairs the leakage point 12 and ensures the grouting stability. In addition, the setting that the composite geomembrane 23 does not directly contact the leakage point 12 can avoid the damage of the composite geomembrane 23 during grouting.

[0044] As Figure 3 shown, fixing parts are arranged around the main reinforcement mesh 21. The fixing parts include fixing rings 211 and fasteners adapted to the fixing rings 211. The main reinforcement mesh 21 is fixed on the dam body 10 through the cooperation of the fixing rings 211 and the fasteners, and thus the repair device can be fixed on the dam body 10. Exemplarily, four fixing rings 211 are respectively arranged at the four corners of the main reinforcement mesh 21.

[0045] Exemplarily, the main reinforcement mesh 21 is composed of steel bars with a diameter of 6 - 8 mm, and the horizontal and vertical spacings of the steel bars are both 3 - 5 cm.

[0046] The rib reinforcement mesh is composed of steel bars with a diameter of 4 - 8 mm, and the horizontal and vertical spacings of the steel bars are both 2 - 4 cm.

[0047] The size of the repair device is about 20m × 20m. Specifically, the size of the repair device can be adaptively adjusted according to the size of the leakage point 12.

[0048] Specifically, as Figure 3 - Figure 5As shown in the figure, through holes 25 are provided on the main reinforcement mesh 21, rib reinforcement mesh, composite geomembrane 23 and water stop layer 30. The grouting pipe 40 is arranged on the frame body 20, and the slurry outlet end of the grouting pipe 40 passes through the preliminary water isolation layer and the water stop layer 30 in sequence through the through hole 25. A one-way valve is also arranged on the grouting pipe 40, so that after the repair device is installed on the dam body 10, the leakage point 12 can be grouted through the grouting pipe 40. Exemplarily, the length of the grouting pipe 40 from the end close to the dam body 10 to the connection with the main reinforcement mesh 21 on the side close to the dam body 10 is 3-5 cm, and the length of the grouting pipe 40 from the end far from the dam body 10 to the connection with the second rib reinforcement mesh 24 on the side far from the dam body 10 is 30-50 cm.

[0049] Specifically, the grouting holes 11 are arranged around the leakage point 12; Exemplarily, the diameter of the grouting holes 11 is 5-10 cm, and the number is 2-4.

[0050] Specifically, the mass of the counterweight 50 is 50-200 kg. By arranging the counterweight 50 at the position corresponding to the leakage point 12 on the frame body 20, the overall weight of the repair device can be increased by using the counterweight 50, so that it can maintain a relatively stable state underwater and improve the stability of the repair device during grouting to ensure the grouting effect.

[0051] Specifically, the water stop layer 30 is a water stop rubber layer with a thickness of 5-10 cm.

[0052] Specifically, connecting pieces for easy hoisting are also arranged on the top and side of the frame body 20.

[0053] During use, first fix the traction rope on the hoisting ship 60 and the traction end of the traction device 70 located at the top of the dam body 10 on the repair device, so as to place the repair device at the position corresponding to the leakage point 12 on the dam body 10 through the combined cooperation of the hoisting ship 60 and the traction device 70 ( Figure 6 ); Then fix the repair device on the dam body 10 through the fixing parts, connect the grouting pipe 40 with the corresponding grouting hole 11, and at the same time, the water stop layer 30 covers the leakage point 12 and the periphery of the grouting hole 11; Grouting through the grouting pipe 40 can complete the repair of the leakage point 12 of the dam body 10.

[0054] The above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit them. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the spirit and scope of the technical solutions of the present invention.

Claims

1. A device for repairing leakage points of a concrete face rockfill dam, characterized in that Including: A dam body, on which a number of grouting holes are provided; A frame body, at least including two layers of steel wire meshes, and a composite geomembrane is arranged between the two layers of steel wire meshes, so that the two layers of steel wire meshes and the composite geomembrane jointly form a preliminary water barrier layer; A water stop layer, arranged on one side of the frame body close to the dam body, so that when the repair device is installed on the dam body, the water stop layer covers the leakage point and the periphery of the grouting hole; A grouting pipe, arranged on the frame body corresponding to the grouting hole, for grouting the leakage point; A counterweight, arranged on the frame body corresponding to the position of the leakage point.

2. The leakage point repair device for the face rockfill dam according to claim 1, wherein: A one-way valve is arranged on the grouting pipe.

3. The leakage point repair device for a concrete face rockfill dam according to claim 1, characterized in that: A fixing member for fixing the frame body on the dam body is also arranged on the frame body.

4. The leakage point repair device for the concrete face rockfill dam according to claim 3, characterized in that: The fixing member is arranged on the steel wire mesh on the side close to the dam body, and includes a fixing ring arranged along the circumferential direction of the steel wire mesh and a fastener adapted to the fixing ring.

5. The leakage point repair device for the concrete face rockfill dam according to claim 1, characterized in that: The mass of the counterweight is 50-200 kg.

6. The leakage point repair device for a concrete face rockfill dam according to claim 1, characterized in that: The water stop layer is a water stop rubber layer with a thickness of 5-10 cm.

7. The device for repairing the leakage point of the concrete face rockfill dam according to claim 1, characterized in that: The steel wire mesh on the side close to the dam body is composed of steel bars with a diameter of 6-8 mm, and the horizontal and vertical spacings of the steel bars are both 3-5 cm.

8. The leakage point repair device for the concrete face rockfill dam according to claim 1, characterized in that: The steel wire mesh on the side far from the dam body is composed of steel bars with a diameter of 4-8 mm, and the horizontal and vertical spacings of the steel bars are both 2-4 cm.

9. The device for repairing leakage points of a concrete face rockfill dam according to claim 1, wherein: The grouting holes are arranged around the leakage point.

10. The device for repairing the leakage point of the concrete face rockfill dam according to claim 1, wherein: Through holes for the grouting pipe to pass through are arranged on both the preliminary water barrier layer and the water stop layer.

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