Dam anti-seepage structure

Abstract

The utility model discloses a dam anti-seepage structure which comprises a dam body and a dam foundation, a gallery is arranged in the dam body, an anti-seepage curtain is arranged in the dam foundation, a first anti-seepage piece is arranged at the upstream end of the dam body and the upstream end of the dam foundation, an anti-seepage face plate is arranged on the water retaining side of the dam body, and the anti-seepage curtain, the first anti-seepage piece and the anti-seepage face plate jointly form a concrete dam anti-seepage system. According to the anti-seepage structure, an anti-seepage system of the dam is formed through the arrangement of the anti-seepage panel, the first anti-seepage piece and the anti-seepage curtain, the anti-seepage effect of the water retaining side of the dam body is enhanced through the arrangement of the anti-seepage panel, and the anti-seepage requirement of the dam body is met.

Description

Technical Field

[0001] This utility model relates to a dam seepage prevention structure. Background Technology

[0002] A concrete dam is a gravity dam whose entire dam body, except for a few small cavities, is filled with concrete. The upstream face of the dam body is a vertical, inclined, or folded face. High and medium dams are equipped with foundation grouting galleries, which are used for various purposes such as foundation grouting, drainage, safety testing, inspection and maintenance, operation, and traffic within the dam.

[0003] Both the upstream face and the foundation of the dam require seepage prevention treatment. The concrete used for the construction of the seepage prevention layer on the upstream face of the dam has a different composition and curing method than the concrete poured into the dam body. This makes the seepage prevention layer very easy to fall off the outer surface of the dam body, resulting in a decrease in the seepage prevention effect. The dam foundation mainly adopts the method of seepage prevention curtain grouting. Usually, only one seepage prevention curtain is installed. When the seepage prevention curtain is eroded by water for a long time, it is easy to develop cracks, which will cause the seepage prevention curtain to fail and seepage to occur. Utility Model Content

[0004] To solve the above-mentioned technical problems, the purpose of this utility model is to improve a dam seepage prevention structure. This seepage prevention structure forms a dam seepage prevention system by setting up a seepage prevention panel, a first seepage prevention component and a seepage prevention curtain. The seepage prevention effect of the water-retaining side of the dam is enhanced by setting up the seepage prevention panel, thereby meeting the seepage prevention requirements of the dam.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a dam seepage prevention structure, comprising a dam body and a dam foundation, wherein a gallery is provided in the dam body, a seepage prevention curtain is provided in the dam foundation, a first seepage prevention component is provided at the upstream end of the dam body and the dam foundation, and a seepage prevention panel is provided on the water-retaining side of the dam body, wherein the seepage prevention curtain, the first seepage prevention component and the seepage prevention panel together form a concrete dam seepage prevention system.

[0006] Furthermore, the first seepage prevention component includes a first groove set upstream of the dam foundation, a concrete layer laid in the first groove, a seepage prevention geotextile laid in the concrete layer, a clay waterproof layer on the seepage prevention geotextile, a reinforcement layer on the outer wall of the clay waterproof layer, and a crushed stone layer connected to the outer wall of the reinforcement layer.

[0007] Furthermore, the seepage-proof panel includes multiple upper plates, lower plates, and multiple intermediate plates connecting the upper and lower plates. The upper and lower plates are provided with protrusions and through holes. The dam body is provided with a connecting mechanism for connecting the seepage-proof panel and the dam body.

[0008] Furthermore, the connecting mechanism includes a second groove provided on the corresponding protrusion of the dam body, and vertically adjacent second grooves are connected by a through hole. A connecting rod is provided vertically in the through hole, and the protrusions of the upper and lower plates pass through the connecting rod.

[0009] Furthermore, the upper plate, lower plate, and middle plate are all right-angled trapezoids when viewed from above, and L-shaped blocks are symmetrically provided on both sides. The L-shaped blocks are connected by a connecting block, and the inner wall of the connecting block is provided with a waterproof coating. The horizontally adjacent plates are connected left and right by the connecting block.

[0010] Furthermore, the lower end faces of both sides of the upper plate, lower plate and middle plate are provided with hooks that slide left and right through sliding blocks, and the hooks are equipped with screws. The end of the screw is provided with an irregular groove for an external rotating rod to be inserted to drive the screw to rotate, thereby realizing the left and right sliding of the hook. The hook is L-shaped, and the upper end of the short side of the hook is provided with a telescopic block, which is inclined.

[0011] The upper plate, lower plate, and middle plate all have recessed cavities and right-angled notches on their upper side surfaces. The end face of the recessed cavity facing the right-angled notch has an opening, and the upper surface of the opening has a bevel, allowing the telescopic locking block to extend out of the opening to achieve vertical locking between adjacent plates.

[0012] Furthermore, the upper surface of the intermediate plate and the upper surface of the lower plate are provided with a first slope, and a limiting groove is provided at the bottom of the first slope. The lower surface of the intermediate plate and the lower surface of the upper plate are provided with a second slope corresponding to the first slope and the second slope is in contact with the first slope. The lower surface of the intermediate plate and the lower surface of the upper plate are provided with an expansion water-stop strip corresponding to the limiting groove.

[0013] Furthermore, the upper and lower surfaces of the intermediate plate and the upper surface of the upper plate are provided with a first slope, and a limiting groove is provided at the bottom of the first slope. The lower surface of the intermediate plate and the lower surface of the upper plate are provided with a corresponding second slope corresponding to the first slope. The second slope fits into the first slope. The lower surface of the intermediate plate and the lower surface of the upper plate are provided with a limiting strip corresponding to the limiting groove. The limiting strip and the limiting groove are connected by bolts.

[0014] Furthermore, the upper and lower adjacent limiting grooves are connected by a drain pipe, and the lower plate is provided with a water collection cavity. The water collection cavity is connected to a water pumping pipe, which is connected to an external water pump to realize the pumping and drainage work.

[0015] Furthermore, the seepage-proof curtain includes a seepage-proof board, and the seepage-proof wall panel is composed of several continuous jet grouting semi-circular piles.

[0016] Beneficial effects:

[0017] 1. This application forms a seepage prevention system for a concrete dam by means of a seepage prevention curtain, a first seepage prevention component, and a seepage prevention panel. The first seepage prevention component includes a concrete layer, a seepage prevention geotextile, a clay waterproof layer, a reinforcement layer, and a crushed stone layer, which enhances the seepage prevention effect at the connection between the dam body and the dam foundation and also enhances the scouring resistance at the connection between the dam body and the dam foundation, thereby slowing down the erosion rate of water flow on the dam body and the dam foundation.

[0018] 2. The seepage-proof panel consists of multiple upper panels, lower panels, and multiple intermediate panels connecting the upper and lower panels. The upper panels, lower panels, and intermediate panels are spliced ​​together to form an integral seepage-proof panel. Then, the seepage-proof panel is connected to the dam body through a connecting mechanism. The seepage-proof panel is designed to be modular, which facilitates the replacement of damaged panels during subsequent maintenance and reduces costs. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the seepage prevention structure;

[0020] Figure 2 This is a schematic diagram showing the internal connection between the seepage prevention panel and the dam body.

[0021] Figure 3 This is a schematic diagram of a waterproof panel;

[0022] Figure 4 for Figure 3 Rear view illustration;

[0023] Figure 5 A schematic diagram showing the vertical connection and splitting of the panel;

[0024] Figure 6 A schematic diagram of the L-shaped card block and connecting block;

[0025] Figure 7 for Figure 6 Another perspective illustration;

[0026] Figure 8 This is a schematic diagram of the vertical connection of the panel hooks;

[0027] Figure 9 for Figure 8 Internal diagram of section A.

[0028] Reference numerals: 1. Dam body; 2. Dam foundation; 3. Gallery; 4. Anti-seepage curtain; 41. Anti-seepage wall panel; 5. First anti-seepage component; 51. First groove; 52. Concrete layer; 53. Anti-seepage geotextile; 54. Clay waterproof layer; 55. Reinforcement layer; 56. Crushed stone layer; 6. Anti-seepage panel; 61. Upper panel; 62. Lower panel; 63. Intermediate panel; 7. Protrusion; 8. Connecting mechanism; 81. Second groove; 82. Through hole; 83. Connecting rod; 9. L-shaped locking block; 10. Connecting block; 11. Hook; 12. Screw rod; 121. Irregular groove; 13. Telescopic locking block; 14. Cavity; 15. Right-angle notch; 16. Opening; 17. First slope; 18. Second slope; 19. Limiting groove; 20. Limiting strip; 21. Drainage pipe; 22. Water collection chamber; 23. Pumping pipe. Detailed Implementation

[0029] To further illustrate the technical means and effects adopted by this utility model in order to achieve the intended utility model purpose, the following detailed description of the specific implementation methods, structure, features and effects of this utility model is provided in conjunction with the accompanying drawings and preferred embodiments.

[0030] For reference Figures 1-9 As shown, this application provides a dam seepage prevention structure to address the problem of poor seepage prevention in concrete dams. The structure includes a dam body 1 and a dam foundation 2. A gallery 3 is provided within the dam body 1, and a seepage prevention curtain 4 is provided within the dam foundation 2. The seepage prevention curtain 4 includes seepage prevention wall panels 41, which are composed of several continuous jet grouting semi-circular piles. A first seepage prevention component 5 is provided at the upstream end of both the dam body 1 and the dam foundation 2, and a seepage prevention panel 6 is provided on the water-retaining side of the dam body 1. The seepage prevention curtain 4, the first seepage prevention component 5, and the seepage prevention panel 6 together form a concrete dam seepage prevention system.

[0031] like Figure 1 Specifically, the first seepage prevention component 5 includes a first groove 51 set upstream of the dam foundation 2. A concrete layer 52 is laid in the first groove 51. A seepage prevention geotextile 53 is laid on the concrete layer 52. A clay waterproof layer 54 is provided on the seepage prevention geotextile 53. A reinforcement layer 55 is provided on the outer wall of the clay waterproof layer 54. A crushed stone layer 56 is connected to the outer wall of the reinforcement layer 55. The crushed stone layer 56 is wrapped with wire mesh to prevent the crushed stone from being scattered by the water flow. The first seepage prevention component 5 enhances the seepage prevention performance at the connection between the dam body 1 and the dam foundation 2, and also improves the erosion resistance of the connection between the dam body 1 and the dam foundation 2, thus slowing down the erosion rate of the water flow on the dam body 1 and the dam foundation 2.

[0032] like Figure 3 As shown, the seepage-proof panel 6 is used to protect the dam body 1. The seepage-proof panel 6 includes multiple upper plates 61, lower plates 62, and multiple intermediate plates 63 connecting the upper plates 61 and lower plates 62. The seepage-proof panel 6 is assembled, which facilitates the replacement of damaged plates during subsequent maintenance, reduces costs, and avoids waste. The upper plates 61 and lower plates 62 are provided with protrusions 7, and the protrusions 7 are provided with through holes. The dam body 1 is provided with a connecting mechanism 8, which is used to connect the seepage-proof panel 6 and the dam body 1. The connecting mechanism 8 includes a second groove 81 corresponding to the protrusions 7 on the dam body 1, and vertically adjacent second grooves 81 are connected by through holes 82. After the seepage-proof panel 6 is assembled, the protrusions 7 are inserted into the second grooves 81, and then the connecting rods 83 are inserted into the through holes and through holes 82 on the protrusions 7 to achieve a close connection between the seepage-proof panel 6 and the water-retaining side of the dam body 1. The upper end of the connecting rod 83 is provided with a threaded end to connect with the dam body 1.

[0033] Specific examples Figure 6 , Figure 7As shown, the upper plate 61, lower plate 62 and middle plate 63 are right-angled trapezoids when viewed from above. Both sides are symmetrically provided with L-shaped locking blocks 9. The L-shaped locking blocks 9 are connected to each other by a connecting block 10. The inner wall of the connecting block 10 is provided with a waterproof coating. The horizontal adjacent plates are connected left and right by the connecting block 10.

[0034] like Figure 8 and Figure 9 As shown, this application provides two methods for connecting vertically adjacent plates. The first method is as follows: Figure 8 and Figure 9 The upper plate 61, lower plate 62, and middle plate 63 all have slots on their lower ends. Each slot has a sliding groove that allows for left and right sliding with a hook 11 equipped with a slider. The hook 11 is equipped with a lead screw 12 that passes through the slot and is rotatably connected to the slot at one end. The other end of the lead screw 12 is rotatably connected to an embedded fixed nut and has a hexagonal groove 121 at the end of the lead screw 12. This groove allows an external rotating rod to be inserted to rotate the lead screw 12. The rotation of the lead screw 12 moves the hook 11, and the movement of the hook 11 causes the spring to unfold or compress. The hook 11 is L-shaped, and a telescopic block 13 is provided at the upper end of the short side of the hook 11. The telescopic block 13 is inclined. The upper end faces of both sides of the upper plate 61, lower plate 62 and middle plate 63 are provided with a cavity 14 and a right-angle notch 15. The end face of the cavity 14 facing the right-angle notch 15 is provided with an opening 16, and the upper end face of the opening 16 is inclined. When vertically adjacent plates are connected, the hook 11 can be inserted into the cavity 14. Then, by rotating the screw 12, the hook 11 can move laterally. The telescopic block 13 contacts the inner wall of the opening 16. The lateral movement will compress downward by the inclined surface of the upper end face of the opening 16, so that the short side of the hook 11 can extend out of the opening 16. After it extends out of the opening 16, the telescopic block 13 will return to its original position and extend upward to achieve the locking.

[0035] like Figure 4 and Figure 5 The second method is as follows: The upper surface of the intermediate plate 63 and the upper surface of the lower plate 62 are provided with a first slope 17, and a limiting groove 19 is provided at the bottom of the first slope 17. The lower surface of the intermediate plate 63 and the lower surface of the upper plate 61 are provided with corresponding second slopes 18, which fit snugly against the first slope 17. The lower surface of the intermediate plate 63 and the lower surface of the upper plate 61 are provided with limiting strips 20 corresponding to the limiting plates. A bolt connection is provided between the limiting strip 20 and the limiting groove 19. The limiting strip 20 has an embedded nut, which is threaded through the limiting groove 19 and connected to the nut via a threaded rod. The bolt connection between the limiting strip 20 and the limiting groove 19 enables a detachable connection between vertically adjacent plates, ensuring a firm connection between the plates.

[0036] Furthermore, to prevent water from seeping into the dam body 1 through the transverse joints, a first slope 17 is provided on the upper end face of the intermediate plate 63 and the upper end face of the lower plate 62. A limiting groove 19 is provided at the bottom of the first slope 17. A second slope 18 is provided on the lower end face of the intermediate plate 63 and the lower end face of the upper plate 61 corresponding to the first slope 17, and the second slope 18 is in close contact with the first slope 17. An expansion water-stop strip is provided on the lower end face of the intermediate plate 63 and the upper plate 61 corresponding to the limiting groove 19. When water seeps in through the transverse joints, it will first come into contact with the expansion water-stop strip. When the expansion water-stop strip comes into contact with water... To prevent more water from seeping in through the horizontal seams, some of the seeping water will accumulate in the limiting groove 19 and needs to be discharged in time. Therefore, a drainage pipe 21 is provided between vertically adjacent limiting grooves 19, and a water collection cavity 22 is provided inside the lower plate 62. The water collection cavity 22 is connected to a pumping pipe 23. The pumping pipe 23 can be connected to an external water pump through the first groove 51 and the through hole 82 of the dam body 1, or a vertical channel is provided for the pumping pipe 23 to pass through and connect to an external water pump (the vertical channel is shown in the figure of this application) to realize pumping and drainage.

[0037] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to a preferred embodiment, it is not intended to limit the present utility model. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present utility model. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present utility model without departing from the scope of the present utility model shall still fall within the scope of the present utility model.

Claims

1. A dam seepage barrier construction, characterised in that: The dam includes a dam body (1) and a dam foundation (2). The dam body (1) is equipped with a gallery (3), and the dam foundation (2) is equipped with a seepage prevention curtain (4). The upstream end of the dam body (1) and the dam foundation (2) is equipped with a first seepage prevention component (5). The water-retaining side of the dam body (1) is equipped with a seepage prevention panel (6). The seepage prevention curtain (4), the first seepage prevention component (5) and the seepage prevention panel (6) together form a concrete dam seepage prevention system.

2. Dam seepage barrier construction according to claim 1, characterized in that: The first seepage prevention component (5) includes a first groove (51) set upstream of the dam foundation (2), a concrete layer (52) is laid in the first groove (51), a seepage prevention geotextile (53) is laid in the concrete layer (52), the seepage prevention geotextile (53) is provided with a clay waterproof layer (54), a reinforcement layer (55) is provided on the outer wall of the clay waterproof layer (54), and a crushed stone layer (56) is connected to the outer wall of the reinforcement layer (55).

3. Dam seepage barrier construction according to claim 2, characterized in that: The seepage-proof panel (6) includes multiple upper plates (61), lower plates (62) and multiple intermediate plates (63) connecting the upper plates (61) and lower plates (62). The upper plates (61) and lower plates (62) are provided with protrusions (7) and the protrusions (7) are provided with through holes. The dam body (1) is provided with a connecting mechanism (8) for connecting the seepage-proof panel (6) and the dam body (1).

4. The dam seepage prevention structure according to claim 3, characterized in that: The connecting mechanism (8) includes a second groove (81) on the corresponding protrusion (7) of the dam body (1), and the vertically adjacent second grooves (81) are connected by a through hole (82). A connecting rod (83) is vertically provided in the through hole (82), and the protrusion (7) of the upper and lower plates (62) passes through the connecting rod (83).

5. Dam seepage barrier construction according to claim 4, characterized in that: The upper plate (61), lower plate (62) and middle plate (63) are all right-angled trapezoids when viewed from above. Both sides are symmetrically provided with L-shaped locking blocks (9). The L-shaped locking blocks (9) are connected to each other by a connecting block (10). The inner wall of the connecting block (10) is provided with a waterproof coating. The horizontal adjacent plates are connected left and right by the connecting block (10).

6. Dam seepage barrier construction according to claim 5, characterized in that: The upper plate (61), lower plate (62) and middle plate (63) are all provided with hooks (11) on the lower end face of both sides, which can slide left and right through the sliding block. The hooks (11) are equipped with screws (12). The end of the screws (12) is provided with a special groove (121) for inserting an external rotating rod to drive the screws (12) to rotate, thereby realizing the left and right sliding of the hooks (11). The hooks (11) are L-shaped. The upper end of the short side of the hooks (11) is provided with a telescopic block (13). The telescopic block (13) is inclined. The upper plate (61), lower plate (62) and middle plate (63) are provided with a cavity (14) and a right angle notch (15) on the upper side of both sides. The cavity (14) has an opening (16) on the end face facing the right angle notch (15). The upper end face of the opening (16) has a slope, so that the telescopic block (13) can extend out of the opening (16) to realize the vertical clamping of adjacent plates.

7. Dam seepage barrier construction according to claim 6, characterized in that: The upper end face of the intermediate plate (63) and the upper end face of the lower plate (62) are provided with a first slope (17), and a limiting groove (19) is provided at the bottom of the first slope (17). The lower end face of the intermediate plate (63) and the lower end face of the upper plate (61) are provided with a second slope (18) corresponding to the first slope (17), and the second slope (18) is in contact with the first slope (17). The lower end face of the intermediate plate (63) and the lower end face of the upper plate (61) are provided with an expansion waterstop strip corresponding to the limiting groove (19).

8. The dam seepage barrier construction according to claim 6, characterized in that: The upper end face of the intermediate plate (63) and the upper end face of the lower plate (62) are provided with a first slope (17), and a limiting groove (19) is provided at the bottom of the first slope (17). The lower end face of the intermediate plate (63) and the lower end face of the upper plate (61) are provided with a corresponding second slope (18) corresponding to the first slope (17). The second slope (18) fits into the first slope (17). The lower end face of the intermediate plate (63) and the lower end face of the upper plate (61) are provided with a limiting strip (20) corresponding to the limiting groove (19). The limiting strip (20) and the limiting groove (19) are connected by bolts.

9. Dam impermeabilization structure according to claim 7 or 8, characterized in that: The adjacent limiting grooves (19) are connected by a drain pipe (21). The lower plate (62) is provided with a water collection cavity (22). The water collection cavity (22) is connected to a water pumping pipe (23). The water pumping pipe (23) is connected to an external water pump to realize the pumping and drainage work.

10. Dam seepage barrier construction according to claim 9, characterized in that: The seepage-proof curtain (4) includes a seepage-proof wall panel (41), which is composed of several continuous jet grouting semi-circular piles.

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