Dam foundation curtain grouting reinforcing structure

Abstract

The utility model discloses a dam foundation curtain grouting reinforcement structure, and belongs to the field of dam foundation curtain grouting reinforcement, the dam foundation curtain grouting reinforcement structure comprises a dam foundation, a plurality of grouting grooves are formed in the top surface of the dam foundation, the plurality of grouting grooves are arranged at equal intervals in the length direction of the dam foundation, slurry is poured in the grouting grooves to form an anti-seepage wall, and a plurality of grouting holes are formed in the top surface of the anti-seepage wall; the grouting holes penetrate through the bottom face of the diaphragm wall. The structure has the effects that the curtain is poured in the dam foundation, the reinforcing stability of the dam foundation is improved, and cracks of the dam foundation under the impact of water flow are reduced.

Description

Technical Field

[0001] This application relates to the field of curtain grouting reinforcement of dam foundations, and in particular to a curtain grouting reinforcement structure for dam foundations. Background Technology

[0002] Curtain grouting is a grouting project that involves injecting grout into fissures and pores in rock or soil layers to form a continuous water-blocking curtain, thereby reducing seepage flow and lowering seepage pressure. Curtain grouting is used in the construction of seepage-proof curtains in the rock or gravel foundations of dams and sluices. The top of the curtain connects to the concrete gate base slab or dam body, while the bottom extends to a certain depth into relatively impermeable rock layers to prevent or reduce the seepage of groundwater in the foundation. Working in conjunction with the downstream drainage system, it also reduces the uplift pressure of seepage water on the dam.

[0003] For example, Chinese Patent CN219080383U discloses a curtain grouting seepage prevention structure, including a soil layer. The structure is characterized by a plurality of grouting holes on the top side of the soil layer, a grouting pipe placed inside each grouting hole, a plurality of spray holes on each grouting pipe, a vibration hole in the middle of each grouting pipe, and a vibrating pipe 1 and a vibrating pipe 2 slidably installed inside each vibration hole. Rubber sealing layers are installed on both sides of each of the vibrating pipe 1 and the vibrating pipe 2, and a piston hole is opened in the middle of each rubber sealing layer. Sliding rods are symmetrically installed in the middle of each of the vibrating pipe 1 and the vibrating pipe 2, and a vibrating rod is slidably installed between the sliding rods. The vibrating rod is piston-connected to the rubber sealing layer. The inner side of each rubber sealing layer is connected to the sliding rod via a vibration spring. A vibration-receiving mechanism is installed on the side of the vibrating pipe 2 away from the vibrating pipe 1, and a knocking mechanism is installed in the grouting pipe closer to the vibrating pipe 1.

[0004] In the aforementioned related technologies, grouting holes are opened on the top surface of the soil layer, and grout is injected into the grouting holes through grouting pipes. The grout in the grouting holes flows into the cracks and pores of the soil layer to form a continuous water-blocking curtain, thereby making the curtain seepage-proof and reinforcing the soil layer. However, since the curtain formed by the grout injected into multiple grouting holes is columnar, and the slope surface corresponding to the depth of the grouting holes is subjected to greater water flow impact pressure, the curtain is prone to breakage under repeated water flow impact, thus reducing the curtain's seepage-proof and reinforcing effect on the soil layer. Utility Model Content

[0005] In order to improve the problem that the curtain inside the grouting hole is columnar, making it prone to breakage under repeated impacts of water flow, thereby reducing the curtain's effectiveness in preventing seepage and reinforcing the soil layer, this application provides a dam foundation curtain grouting reinforcement structure.

[0006] The technical solution for a dam foundation curtain grouting reinforcement structure provided in this application is as follows:

[0007] A dam foundation curtain grouting reinforcement structure includes a dam foundation, the top surface of which is provided with multiple grouting grooves, the multiple grouting grooves are arranged at equal intervals along the length of the dam foundation, grout is poured into the grouting grooves to form a seepage barrier wall, the top surface of the seepage barrier wall is provided with multiple grouting holes, the grouting holes penetrate the bottom surface of the seepage barrier wall.

[0008] By adopting the above technical solution, a seepage barrier wall is poured into the dam foundation. Then, multiple grouting holes are opened on the top surface of the seepage barrier wall. Mud is then poured into the grouting holes, allowing the mud to flow into the cracks in the dam foundation and spread to form a curtain. This makes the curtain and the seepage barrier wall form a whole, thereby improving the rigidity of the curtain and reducing the possibility of cracks in the dam foundation under the repeated impact of water flow. This improves the seepage prevention and reinforcement effect of the curtain on the dam foundation.

[0009] Preferably, a plurality of steel bars I are vertically placed in the grouting trench, and a plurality of horizontally arranged steel bars II are provided on one side of the plurality of steel bars I. The steel bars I and the steel bars II are fixedly connected by tie wire.

[0010] By adopting the above technical solution, multiple steel bars 1 and multiple steel bars 2 are set in the grouting trench. When the grout is poured into the grouting trench, steel bars 1 and 2 are embedded in the grout, so that the seepage barrier wall formed by the solidification of the grout is more stable.

[0011] Preferably, two reinforcement grooves are formed on the top surface of the dam foundation, and the two reinforcement grooves are respectively located on both sides of the grouting groove, and reinforcement beams are poured in the reinforcement grooves.

[0012] By adopting the above technical solution, two reinforcing beams are poured on the top surface of the dam foundation, which facilitates the compaction of the two dam foundations.

[0013] Preferably, the reinforcement groove has an inclined connecting groove on its inner side near the grouting groove, and the connecting groove is connected to the grouting groove.

[0014] By adopting the above technical solution, when the reinforcement beam is poured, the slurry flows to the grouting trench through the connecting channel, so that the reinforcement beam and the seepage prevention wall are connected into a whole, thereby further improving the reinforcement stability of the dam foundation.

[0015] Preferably, the top end of the first reinforcing bar extends out of the grouting groove, and multiple connecting beams are cast between the two reinforcing beams, with the top end of the first reinforcing bar located inside the connecting beam.

[0016] By adopting the above technical solution, multiple connecting beams are cast between the two reinforcing beams, further improving the integrity between the reinforcing beams and the seepage barrier wall.

[0017] Preferably, a horizontally arranged connecting steel bar is fixed at the top of the first steel bar, and the connecting steel bar is located inside the connecting beam.

[0018] By adopting the above technical solution, connecting steel bars are fixed at the top of steel bar one, so that the connecting steel bars are cast inside the connecting beam, thereby improving the strength of the connecting beam.

[0019] Preferably, the dam foundation slope is paved with a number of slope protection stones.

[0020] By adopting the above technical solution, multiple slope protection stones are laid on the slope of the dam foundation to protect the slope of the dam foundation, thereby reducing the possibility of the dam foundation slope collapsing due to water erosion.

[0021] Preferably, a square groove is formed on the top surface of the slope protection stone block, the square groove extends vertically through the slope protection stone block, and vegetation is planted in the square groove.

[0022] By adopting the above technical solution, vegetation is planted in the square trench, thereby improving the stability of the slope protection stones laid on the dam foundation slope.

[0023] In summary, this application includes at least one of the following beneficial technical effects:

[0024] 1. A seepage barrier wall is poured into the dam foundation. Then, multiple grouting holes are opened on the top surface of the seepage barrier wall. Mud is then poured into the grouting holes, allowing the mud to flow into the cracks in the dam foundation and spread to form a curtain. This makes the curtain and the seepage barrier wall form a whole, thereby increasing the rigidity of the curtain and reducing the possibility of cracks in the dam foundation under the repeated impact of water flow. This improves the seepage prevention and reinforcement effect of the curtain on the dam foundation.

[0025] 2. Multiple steel bars 1 and multiple steel bars 2 are installed in the grouting trench. When pouring mud into the grouting trench, steel bars 1 and 2 are embedded in the mud, so that the seepage barrier wall formed by the solidification of the mud is more stable.

[0026] 3. Lay multiple retaining stones on the slope of the dam foundation to protect the slope of the dam foundation, thereby reducing the possibility of the dam foundation slope collapsing due to water erosion. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the overall structure of the dam foundation curtain grouting reinforcement structure in the embodiment of this application.

[0028] Figure 2 This is a structural schematic diagram of steel bar one and steel bar two in the embodiments of this application.

[0029] Figure 3 This is a cross-sectional view of the dam foundation in an embodiment of this application.

[0030] Attached reference numerals: 1. Dam foundation; 11. Slope protection stones; 12. Square trench; 13. Vegetation; 2. Grouting trench; 21. Reinforcing bar one; 22. Reinforcing bar two; 23. Cutoff wall; 24. Grouting hole; 3. Reinforcing trench; 31. Connecting trench; 32. Reinforcing beam; 33. Connecting reinforcing bar; 34. Connecting beam. Detailed Implementation

[0031] The following is in conjunction with the appendix Figure 1-3 This application will be described in further detail.

[0032] This application discloses a curtain grouting reinforcement structure for dam foundations.

[0033] Reference Figure 1 A curtain grouting reinforcement structure for a dam foundation 1 includes a dam foundation 1. The slope of the dam foundation 1 is covered with multiple slope protection stones 11. A square groove 12 is opened on the side of the slope protection stones 11 away from the slope of the dam foundation 1. The square groove 12 penetrates the slope protection stones 11. Soil is laid in the square groove 12 and vegetation 13 is planted on the soil.

[0034] Reference Figure 1 and Figure 2 Multiple grouting grooves 2 are provided on the top surface of the dam foundation 1, and are evenly spaced along the length of the dam foundation 1. Multiple vertically arranged reinforcing bars 21 are installed within the grouting grooves 2, with the tops of the reinforcing bars 21 extending out of the grouting grooves 2. Multiple horizontally arranged reinforcing bars 22 are installed on one side of the reinforcing bars 21 and 22, and are fixedly connected by tie wires. A cutoff wall 23 is poured into the grouting grooves 2, with the reinforcing bars 21 and 22 embedded within the cutoff wall 23. Multiple grouting holes 24 are provided on the top surface of the cutoff wall 23, and are evenly spaced along the length of the cutoff wall 23.

[0035] Reference Figure 1 , Figure 2 and Figure 3 Two reinforcement trenches 3 are formed on the top surface of the dam foundation 1. The two reinforcement trenches 3 are located on both sides of multiple grouting trenches 2. Multiple connecting trenches 31 are formed on the inner side of the reinforcement trenches 3 near the grouting trenches 2. The connecting trenches 31 are connected to the grouting trenches 2. Reinforcing beams 32 are poured inside the reinforcement trenches 3. Connecting steel bars 33 are fixed to the top of the reinforcing bars 21. Multiple connecting beams 34 are poured between the two reinforcement beams 32. The connecting steel bars 33 are located inside the connecting beams 34.

[0036] The implementation principle of the dam foundation curtain grouting reinforcement structure in this application embodiment is as follows: steel bars 21 and 22 are installed in the grouting trench 2 on the dam foundation 1. Then, a seepage barrier wall 23 is poured in the grouting trench 2. Then, multiple grouting holes 24 are opened on the top surface of the seepage barrier wall 23. Then, mud is poured into the grouting holes 24 through the grouting pipe, so that the mud flows into the cracks of the dam foundation 1 and spreads to form a curtain, so that the curtain and the seepage barrier wall 23 form a whole, thereby improving the strength of the curtain and reducing the possibility of cracks in the dam foundation 1 under the repeated impact of water flow, thereby improving the seepage prevention and reinforcement effect of the curtain on the dam foundation.

[0037] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A dam foundation curtain grouting reinforcement structure, characterized in that: The dam foundation (1) includes a dam foundation (1) with a plurality of grouting grooves (2) on its top surface. The plurality of grouting grooves (2) are arranged at equal intervals along the length of the dam foundation (1). Mud is poured into the grouting grooves (2) to form a seepage barrier wall (23). The top surface of the seepage barrier wall (23) has a plurality of grouting holes (24) that penetrate the bottom surface of the seepage barrier wall (23).

2. The dam foundation curtain grouting reinforcement structure according to claim 1, characterized in that: Multiple reinforcing bars (21) are vertically placed inside the grouting trench (2). Multiple horizontally arranged reinforcing bars (22) are provided on one side of the multiple reinforcing bars (21). The reinforcing bars (21) and the reinforcing bars (22) are fixedly connected by tie wire.

3. The dam foundation curtain grouting reinforcement structure according to claim 2, characterized in that: Two reinforcement grooves (3) are opened on the top surface of the dam foundation (1). The two reinforcement grooves (3) are located on both sides of the grouting groove (2). Reinforcement beams (32) are poured in the reinforcement grooves (3).

4. The dam foundation curtain grouting reinforcement structure according to claim 3, characterized in that: The reinforcement groove (3) has an inclined connecting groove (31) on its inner side near the grouting groove (2), and the connecting groove (31) is connected to the grouting groove (2).

5. The dam foundation curtain grouting reinforcement structure according to claim 4, characterized in that: The top of the first reinforcing bar (21) extends out of the grouting groove (2), and multiple connecting beams (34) are cast between the two reinforcing beams (32), with the top of the first reinforcing bar (21) located inside the connecting beams (34).

6. The dam foundation curtain grouting reinforcement structure according to claim 5, characterized in that: The top of the first reinforcing bar (21) is fixed with a horizontally arranged connecting reinforcing bar (33), which is located inside the connecting beam (34).

7. The dam foundation curtain grouting reinforcement structure according to claim 1, characterized in that: The slope of the dam foundation (1) is covered with several retaining stones (11).

8. The dam foundation curtain grouting reinforcement structure according to claim 7, characterized in that: The top surface of the slope protection stone block (11) is provided with a square groove (12), the square groove (12) penetrates the slope protection stone block (11) vertically, and vegetation (13) is planted in the square groove (12).

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