Base device for connecting bituminous concrete core wall and dam foundation concrete diaphragm wall

Abstract

The utility model discloses a base device for connecting an asphalt concrete core wall and a dam foundation concrete diaphragm wall, which comprises a connecting base, an anti-seepage unit is connected in the base, the anti-seepage unit is respectively connected with a first connecting unit and a second connecting unit, the first connecting unit is connected with the asphalt concrete core wall, and the second connecting unit is connected with the dam foundation concrete diaphragm wall. A reinforcing unit is connected to the side, away from the anti-seepage unit, of the second connecting unit, connected with a concrete anti-seepage wall and connected with the base. The joint bars are arranged on the uneven top surface of the concrete diaphragm wall, the second-stage concrete is poured, and the water stop copper sheets and the water stop strips are arranged at the parting positions, so that the upper concrete base is reliably connected with the diaphragm wall, and a novel base structure which is simple and reliable in structure and convenient to construct is formed; the defects that an existing base is complex in structure and construction are overcome, the overall reliability is improved, and a good anti-seepage effect is achieved.

Description

Technical Field

[0001] This utility model belongs to the technical field of water conservancy and hydropower engineering equipment, specifically relating to a base device for connecting an asphalt concrete core wall and a dam foundation concrete anti-seepage wall. Background Technology

[0002] Among numerous water conservancy and hydropower projects, reservoirs and dams play a crucial role in impounding water, regulating water flow, and ensuring flood control, irrigation, water supply, and power generation in the surrounding areas. The seepage prevention performance of a dam is one of the core elements ensuring its safe and stable operation and preventing water loss due to seepage. If seepage occurs in a dam and is not effectively controlled, it will not only lead to the unnecessary waste of water resources but may also cause adverse phenomena such as increased pore water pressure and soil softening within the dam body, thereby weakening the dam's structural strength. In severe cases, it may even lead to dam collapse and other major safety accidents, posing a huge threat to the lives and property of people downstream.

[0003] Asphalt concrete core walls are widely used in earth-rock dams and other dam types due to their excellent seepage prevention performance, adaptability to deformation, and relatively simple construction process. They rely on the inherent adhesiveness and density of asphalt materials for seepage prevention. However, in addition to the dam foundations on both banks, the asphalt concrete core wall requires a stable and reliable substructure and connection in the riverbed dam foundation to ensure its effective seepage prevention and to properly transfer the vertical loads it bears to the dam foundation. Dam foundation concrete cutoff walls are typically constructed on the dam foundation overburden layer, aiming to cut off any permeable layers that may exist beneath the dam foundation and prevent leakage. Using construction techniques such as drilling and pouring to form a continuous, high-strength, and low-permeability concrete wall within the dam foundation is a highly effective means of dam foundation seepage prevention. However, the top of the concrete cutoff wall needs to be properly connected to the upper dam seepage prevention structure to ensure the continuity of the entire seepage prevention system.

[0004] Currently, in many engineering practices, the connection between the asphalt concrete core wall and the dam foundation concrete cutoff wall is often achieved through relatively simple transition methods, such as direct butt joints or conventional methods like simple steel reinforcement connections. During the long-term operation of the dam, due to factors such as dam body settlement deformation, stress caused by temperature changes, and concrete shrinkage, this conventional connection method is prone to cracking at the connection points, leading to seepage and leakage. This creates weak points in the seepage control system and affects the overall seepage control effect. Utility Model Content

[0005] The purpose of this utility model is to provide a base device for connecting the asphalt concrete core wall and the dam foundation concrete anti-seepage wall, which solves the problem of poor anti-seepage effect caused by simply connecting the asphalt concrete core wall and the dam foundation concrete anti-seepage wall in the prior art.

[0006] The technical solution adopted by this utility model is a base device for connecting an asphalt concrete core wall and a dam foundation concrete anti-seepage wall, including a connecting base, an anti-seepage unit connected inside the base, a first connecting unit and a second connecting unit respectively connected to the anti-seepage unit, the first connecting unit being connected to the asphalt concrete core wall, and a reinforcement unit being connected to the side of the second connecting unit away from the anti-seepage unit, the reinforcement unit being connected to the concrete anti-seepage wall, and the reinforcement unit being connected to the base.

[0007] The features of this utility model also include:

[0008] The first connecting unit includes two first water-stop copper plates arranged parallel to each other. Both first water-stop copper plates are connected to the seepage prevention unit, and the side of the two first water-stop copper plates away from the seepage prevention unit is connected to the asphalt concrete core wall.

[0009] The second connecting unit includes two third water-stop copper plates arranged parallel to each other. Both third water-stop copper plates are connected to the seepage prevention unit, and the side of the two third water-stop copper plates away from the seepage prevention unit is connected to the reinforcement unit.

[0010] The reinforcement unit includes secondary concrete, which is connected to the bottom of the base. The side of the secondary concrete away from the base is connected to the concrete anti-seepage wall. The bottom edge of the third water-stop copper plate is connected to the secondary concrete.

[0011] Several reinforcing bars are evenly inserted longitudinally inside the concrete cutoff wall, with the ends of the reinforcing bars furthest from the concrete cutoff wall embedded in the secondary concrete.

[0012] The seepage prevention unit includes two opposing second water-stop copper plates, which are connected to the base. The first and third water-stop copper plates are connected to the opposite sides of the second water-stop copper plates. The first water-stop copper plate is located near the top of the second water-stop copper plate, and the third water-stop copper plate is located near the bottom of the second water-stop copper plate.

[0013] A horizontal slit is provided inside the base, and a second water-stop copper sheet is connected to the horizontal slit. The space between the second water-stop copper sheet and the horizontal slit is filled with horizontal slit material.

[0014] An expansion sealing strip is provided between the two second water-stopping copper sheets.

[0015] The opposite sides of the base are set as slopes, with the slopes located near the bottom of the base.

[0016] The beneficial effects of this utility model are:

[0017] This utility model relates to a base device for connecting an asphalt concrete core wall and a dam foundation concrete cutoff wall. By installing reinforcing bars on the uneven top surface of the concrete cutoff wall, pouring secondary concrete, and placing water-stop copper sheets and water-stop strips at the joints, a reliable connection between the upper concrete base and the cutoff wall is achieved. This forms a novel base structure that is simple, reliable, and easy to construct. In addition to ensuring its own structural stability, the device plays a crucial role in connecting the upper and lower layers of the seepage prevention system. It also provides a reliable construction platform for the upper asphalt concrete core wall, overcoming the drawbacks of previous base structures and complex construction methods, improving overall reliability, and achieving excellent seepage prevention results. Attached Figure Description

[0018] Figure 1 This is a connection diagram of the base device for connecting the asphalt concrete core wall and the dam foundation concrete seepage prevention wall of this utility model.

[0019] Figure 2 This is a cross-sectional view of the first water-stopping copper sheet in the base device of the present invention that connects the asphalt concrete core wall and the dam foundation concrete anti-seepage wall.

[0020] Figure 3 This is a cross-sectional view of the second water-stop copper sheet in the base device of the present invention that connects the asphalt concrete core wall and the dam foundation concrete anti-seepage wall.

[0021] Figure 4 This is a schematic diagram of the connection structure of the second water-stop copper sheet in the base device of the present invention, which connects the asphalt concrete core wall and the dam foundation concrete anti-seepage wall.

[0022] In the diagram: 1. Base, 2. Concrete anti-seepage wall, 3. Second-stage concrete, 4. Asphalt concrete core wall, 5. First water-stop copper plate, 6. Second water-stop copper plate, 7. Reinforcing bar, 8. Third water-stop copper plate. Detailed Implementation

[0023] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments.

[0024] This utility model provides a base device for connecting the asphalt concrete core wall and the dam foundation concrete anti-seepage wall, such as... Figure 1 As shown, the system includes a connecting base 1, within which a seepage-proof unit is connected. The seepage-proof unit is connected to a first connecting unit and a second connecting unit. The first connecting unit is connected to an asphalt concrete core wall 4. The side of the second connecting unit furthest from the seepage-proof unit is connected to a reinforcing unit, which is connected to a concrete seepage-proof wall 2. The reinforcing unit is connected to the base 1. The base 1 is a concrete base, and its connection to the reinforcing unit is filled with a filling material at the joint. The first connecting unit is connected to the asphalt concrete core wall 4 to ensure that there is no leakage or seepage at the contact point between the concrete base and the upper asphalt concrete core wall 4.

[0025] Example 1

[0026] A base device for connecting an asphalt concrete core wall and a dam foundation concrete cutoff wall includes a connecting base 1. A cutoff unit is connected inside the base 1. The cutoff unit is connected to a first connecting unit and a second connecting unit. The first connecting unit is connected to the asphalt concrete core wall 4. A reinforcement unit is connected to the side of the second connecting unit away from the cutoff unit. The reinforcement unit is connected to the concrete cutoff wall 2. The reinforcement unit is connected to the base 1.

[0027] like Figure 2 As shown, the first connecting unit includes two parallel first water-stop copper plates 5, both of which are connected to the seepage prevention unit. The side of the two first water-stop copper plates 5 furthest from the seepage prevention unit is connected to the asphalt concrete core wall 4. The first water-stop copper plates 5 are arranged on the top surface of the base 1 as a water-stopping structure to meet the seepage prevention requirements of the device.

[0028] Example 2

[0029] A base device for connecting an asphalt concrete core wall and a dam foundation concrete cutoff wall includes a connecting base 1. A cutoff unit is connected inside the base 1. The cutoff unit is connected to a first connecting unit and a second connecting unit. The first connecting unit is connected to the asphalt concrete core wall 4. A reinforcement unit is connected to the side of the second connecting unit away from the cutoff unit. The reinforcement unit is connected to the concrete cutoff wall 2. The reinforcement unit is connected to the base 1.

[0030] The first connecting unit includes two first water-stop copper plates 5 arranged parallel to each other. Both first water-stop copper plates 5 are connected to the seepage prevention unit, and the side of the two first water-stop copper plates 5 away from the seepage prevention unit is connected to the asphalt concrete core wall 4.

[0031] The second connecting unit includes two parallel third water-stop copper plates 8, both of which are connected to the seepage prevention unit. The side of the two third water-stop copper plates 8 furthest from the seepage prevention unit is connected to the reinforcement unit. The third water-stop copper plates 8 have the same structure as the first water-stop copper plates 5. The third water-stop copper plates 8 are connected to the reinforcement unit to ensure that there is no leakage or seepage at the joint between them and the base 1.

[0032] Example 3

[0033] A base device for connecting an asphalt concrete core wall and a dam foundation concrete cutoff wall includes a connecting base 1. A cutoff unit is connected inside the base 1. The cutoff unit is connected to a first connecting unit and a second connecting unit. The first connecting unit is connected to the asphalt concrete core wall 4. A reinforcement unit is connected to the side of the second connecting unit away from the cutoff unit. The reinforcement unit is connected to the concrete cutoff wall 2. The reinforcement unit is connected to the base 1.

[0034] The first connecting unit includes two first water-stop copper plates 5 arranged parallel to each other. Both first water-stop copper plates 5 are connected to the seepage prevention unit, and the side of the two first water-stop copper plates 5 away from the seepage prevention unit is connected to the asphalt concrete core wall 4.

[0035] The second connecting unit includes two parallel third water-stop copper plates 8, both of which are connected to the seepage prevention unit. The side of the two third water-stop copper plates 8 away from the seepage prevention unit is connected to the reinforcement unit.

[0036] The reinforcement unit includes secondary concrete 3, which is connected to the bottom of the base 1. The side of secondary concrete 3 away from the base 1 is connected to the concrete anti-seepage wall 2. The bottom edge of the third water-stop copper plate 8 is connected to the secondary concrete 3. The original concrete on top of the concrete anti-seepage wall 2 is completely removed by at least 50cm. Adhesive and anti-seepage material is applied to the contact surface of the removed concrete anti-seepage wall 2. After drying, secondary concrete 3 with a strength not lower than that of the concrete anti-seepage wall 2 is poured. The third water-stop copper plate 8 connected to the secondary concrete 3 ensures that there is no leakage or seepage at the joint between it and the base concrete.

[0037] Example 4

[0038] A base device for connecting an asphalt concrete core wall and a dam foundation concrete cutoff wall includes a connecting base 1. A cutoff unit is connected inside the base 1. The cutoff unit is connected to a first connecting unit and a second connecting unit. The first connecting unit is connected to the asphalt concrete core wall 4. A reinforcement unit is connected to the side of the second connecting unit away from the cutoff unit. The reinforcement unit is connected to the concrete cutoff wall 2. The reinforcement unit is connected to the base 1.

[0039] The first connecting unit includes two first water-stop copper plates 5 arranged parallel to each other. Both first water-stop copper plates 5 are connected to the seepage prevention unit, and the side of the two first water-stop copper plates 5 away from the seepage prevention unit is connected to the asphalt concrete core wall 4.

[0040] The second connecting unit includes two parallel third water-stop copper plates 8, both of which are connected to the seepage prevention unit. The side of the two third water-stop copper plates 8 away from the seepage prevention unit is connected to the reinforcement unit.

[0041] The reinforcement unit includes a secondary concrete 3, which is connected to the bottom of the base 1. The side of the secondary concrete 3 away from the base 1 is connected to the concrete anti-seepage wall 2. The bottom edge of the third water-stop copper plate 8 is connected to the secondary concrete 3.

[0042] Several longitudinal reinforcing bars 7 are evenly inserted into the concrete cutoff wall 2. The ends of the reinforcing bars 7 furthest from the concrete cutoff wall 2 are embedded in the secondary concrete 3. The reinforcing bars 7 are exposed for 40cm. The secondary concrete 3 is equipped with reinforcing steel bars, which are connected to the reinforcing bars 7 to ensure strength.

[0043] Example 5

[0044] A base device for connecting an asphalt concrete core wall and a dam foundation concrete cutoff wall includes a connecting base 1. A cutoff unit is connected inside the base 1. The cutoff unit is connected to a first connecting unit and a second connecting unit. The first connecting unit is connected to the asphalt concrete core wall 4. A reinforcement unit is connected to the side of the second connecting unit away from the cutoff unit. The reinforcement unit is connected to the concrete cutoff wall 2. The reinforcement unit is connected to the base 1.

[0045] The first connecting unit includes two first water-stop copper plates 5 arranged parallel to each other. Both first water-stop copper plates 5 are connected to the seepage prevention unit, and the side of the two first water-stop copper plates 5 away from the seepage prevention unit is connected to the asphalt concrete core wall 4.

[0046] The second connecting unit includes two parallel third water-stop copper plates 8, both of which are connected to the seepage prevention unit. The side of the two third water-stop copper plates 8 away from the seepage prevention unit is connected to the reinforcement unit.

[0047] The reinforcement unit includes a secondary concrete 3, which is connected to the bottom of the base 1. The side of the secondary concrete 3 away from the base 1 is connected to the concrete anti-seepage wall 2. The bottom edge of the third water-stop copper plate 8 is connected to the secondary concrete 3.

[0048] Several reinforcing bars 7 are evenly inserted longitudinally inside the concrete anti-seepage wall 2, and the ends of the reinforcing bars 7 away from the concrete anti-seepage wall 2 are embedded in the secondary concrete 3.

[0049] like Figure 3-4 As shown, the seepage-proof unit includes two opposing second water-stop copper plates 6, which are connected within the base 1. A first water-stop copper plate 5 and a third water-stop copper plate 8 are connected one-to-one to the opposite sides of the second water-stop copper plates 6. The first water-stop copper plate 5 is positioned near the top of the second water-stop copper plate 6, and the third water-stop copper plate 8 is positioned near the bottom of the second water-stop copper plate 6. Each second water-stop copper plate 6 has one first water-stop copper plate 5 and one third water-stop copper plate 8 connected to its inner side.

[0050] Example 6

[0051] A base device for connecting an asphalt concrete core wall and a dam foundation concrete cutoff wall includes a connecting base 1. A cutoff unit is connected inside the base 1. The cutoff unit is connected to a first connecting unit and a second connecting unit. The first connecting unit is connected to the asphalt concrete core wall 4. A reinforcement unit is connected to the side of the second connecting unit away from the cutoff unit. The reinforcement unit is connected to the concrete cutoff wall 2. The reinforcement unit is connected to the base 1.

[0052] The first connecting unit includes two first water-stop copper plates 5 arranged parallel to each other. Both first water-stop copper plates 5 are connected to the seepage prevention unit, and the side of the two first water-stop copper plates 5 away from the seepage prevention unit is connected to the asphalt concrete core wall 4.

[0053] The second connecting unit includes two parallel third water-stop copper plates 8, both of which are connected to the seepage prevention unit. The side of the two third water-stop copper plates 8 away from the seepage prevention unit is connected to the reinforcement unit.

[0054] The reinforcement unit includes a secondary concrete 3, which is connected to the bottom of the base 1. The side of the secondary concrete 3 away from the base 1 is connected to the concrete anti-seepage wall 2. The bottom edge of the third water-stop copper plate 8 is connected to the secondary concrete 3.

[0055] Several reinforcing bars 7 are evenly inserted longitudinally inside the concrete anti-seepage wall 2, and the ends of the reinforcing bars 7 away from the concrete anti-seepage wall 2 are embedded in the secondary concrete 3.

[0056] The seepage prevention unit includes two opposing second water-stop copper plates 6, which are connected to the base 1. The first water-stop copper plate 5 and the third water-stop copper plate 8 are connected to the opposite sides of the second water-stop copper plate 6. The first water-stop copper plate 5 is located near the top of the second water-stop copper plate 6, and the third water-stop copper plate 8 is located near the bottom of the second water-stop copper plate 6.

[0057] A horizontal seam is provided inside the base 1, and a second water-stop copper sheet 6 is connected to the horizontal seam. The space between the second water-stop copper sheet 6 and the horizontal seam is filled with horizontal seam material. The horizontal seam is located between the bases 1. Part of the second water-stop copper sheet 6 is located in one base 1, and the other part is located in an adjacent base 1. The horizontal seam is filled with horizontal seam material to prevent water seepage and leakage.

[0058] Example 7

[0059] A base device for connecting an asphalt concrete core wall and a dam foundation concrete cutoff wall includes a connecting base 1. A cutoff unit is connected inside the base 1. The cutoff unit is connected to a first connecting unit and a second connecting unit. The first connecting unit is connected to the asphalt concrete core wall 4. A reinforcement unit is connected to the side of the second connecting unit away from the cutoff unit. The reinforcement unit is connected to the concrete cutoff wall 2. The reinforcement unit is connected to the base 1.

[0060] The first connecting unit includes two first water-stop copper plates 5 arranged parallel to each other. Both first water-stop copper plates 5 are connected to the seepage prevention unit, and the side of the two first water-stop copper plates 5 away from the seepage prevention unit is connected to the asphalt concrete core wall 4.

[0061] The second connecting unit includes two parallel third water-stop copper plates 8, both of which are connected to the seepage prevention unit. The side of the two third water-stop copper plates 8 away from the seepage prevention unit is connected to the reinforcement unit.

[0062] The reinforcement unit includes a secondary concrete 3, which is connected to the bottom of the base 1. The side of the secondary concrete 3 away from the base 1 is connected to the concrete anti-seepage wall 2. The bottom edge of the third water-stop copper plate 8 is connected to the secondary concrete 3.

[0063] Several reinforcing bars 7 are evenly inserted longitudinally inside the concrete anti-seepage wall 2, and the ends of the reinforcing bars 7 away from the concrete anti-seepage wall 2 are embedded in the secondary concrete 3.

[0064] The seepage prevention unit includes two opposing second water-stop copper plates 6, which are connected to the base 1. The first water-stop copper plate 5 and the third water-stop copper plate 8 are connected to the opposite sides of the second water-stop copper plate 6. The first water-stop copper plate 5 is located near the top of the second water-stop copper plate 6, and the third water-stop copper plate 8 is located near the bottom of the second water-stop copper plate 6.

[0065] A horizontal slit is provided inside the base 1, and a second water-stop copper sheet 6 is connected to the horizontal slit. The space between the second water-stop copper sheet 6 and the horizontal slit is filled with horizontal slit material.

[0066] An expansion water-stop strip is provided between the two second water-stop copper plates 6. The expansion water-stop strip is set in the same direction as the length of the second water-stop copper plates 6. The installation of the expansion water-stop strip ensures the seepage prevention performance of the entire base concrete structure at the transverse joint.

[0067] The opposite sides of the base 1 are set as slopes, and the slopes are set near the bottom of the base 1. The lower part of both sides of the base 1 is set as a sloping structure, which can make the lower foundation after compaction better, and avoid excessive stress on the upper base concrete and asphalt concrete core wall 4 due to uneven settlement of the foundation, which would affect the safety of the overall seepage prevention structure.

[0068] The working principle of the base device for connecting the asphalt concrete core wall and the dam foundation concrete anti-seepage wall of this utility model is as follows:

[0069] The top of the original concrete of the concrete cutoff wall 2 is completely removed to a height of at least 50cm. Two rows of reinforcing bars 7 are arranged longitudinally along the concrete cutoff wall 2, with 40cm of the reinforcing bars exposed. Adhesive and anti-seepage material is applied to the contact surface of the removed concrete cutoff wall 2. After drying, secondary concrete 3 with a strength no less than that of the concrete cutoff wall 2 is poured. The secondary concrete 3 contains reinforcing bars reliably connected to the reinforcing bars 7. At the same time, two third water-stop copper plates 8 are connected to the top of the secondary concrete 3 to ensure that there is no leakage or seepage at the joint between it and the base concrete. The base concrete has a horizontal joint. In addition to the grouting material, two second water-stop copper plates 6 are installed in the horizontal joint to reliably connect the third water-stop copper plates 8 and the first water-stop copper plates 5. An expansion water-stop strip is also installed between the two second water-stop copper plates 6 to ensure the anti-seepage performance of the entire base concrete structure at the horizontal joint. The sloping structure set on both sides of the lower part of the foundation concrete can make the lower foundation more compacted after compaction, and avoid excessive stress on the upper foundation concrete and asphalt concrete core wall caused by uneven settlement of the foundation, which would affect the safety of the overall seepage prevention structure.

[0070] This utility model relates to a base device for connecting an asphalt concrete core wall and a dam foundation concrete cutoff wall. By installing reinforcing bars on the uneven top surface of the concrete cutoff wall, pouring secondary concrete, and placing water-stop copper sheets and water-stop strips at the joints, a reliable connection between the upper concrete base and the cutoff wall is achieved. This forms a novel base structure that is simple, reliable, and easy to construct. In addition to ensuring its own structural stability, the device plays a crucial role in connecting the upper and lower layers of the seepage prevention system. It also provides a reliable construction platform for the upper asphalt concrete core wall, overcoming the drawbacks of previous base structures and complex construction methods, improving overall reliability, and achieving excellent seepage prevention results.

Claims

1. A base device for connecting an asphalt concrete core wall and a dam foundation concrete cutoff wall, characterized in that, It includes a connecting base (1), in which a seepage prevention unit is connected. The seepage prevention unit is connected to a first connecting unit and a second connecting unit. The first connecting unit is connected to an asphalt concrete core wall (4). The side of the second connecting unit away from the seepage prevention unit is connected to a reinforcement unit. The reinforcement unit is connected to a concrete seepage prevention wall (2). The reinforcement unit is connected to the base (1).

2. The base device for connecting the asphalt concrete core wall and the dam foundation concrete seepage barrier wall according to claim 1, characterized in that, The first connecting unit includes two first water-stop copper plates (5) arranged parallel to each other. Both first water-stop copper plates (5) are connected to the seepage prevention unit. The side of the two first water-stop copper plates (5) away from the seepage prevention unit is connected to the asphalt concrete core wall (4).

3. The base device for connecting the asphalt concrete core wall and the dam foundation concrete seepage barrier wall according to claim 1, characterized in that, The second connecting unit includes two third water-stop copper plates (8) arranged parallel to each other. Both third water-stop copper plates (8) are connected to the seepage prevention unit, and the side of the two third water-stop copper plates (8) away from the seepage prevention unit is connected to the reinforcement unit.

4. The base device for connecting the asphalt concrete core wall and the dam foundation concrete seepage barrier wall according to claim 3, characterized in that, The reinforcement unit includes a secondary concrete (3), which is connected to the bottom of the base (1). The side of the secondary concrete (3) away from the base (1) is connected to the concrete anti-seepage wall (2), and the bottom edge of the third water-stop copper sheet (8) is connected to the secondary concrete (3).

5. The base device for connecting the asphalt concrete core wall and the dam foundation concrete seepage barrier wall according to claim 4, characterized in that, The concrete anti-seepage wall (2) is longitudinally and uniformly inserted with several reinforcing bars (7), and the ends of the reinforcing bars (7) away from the concrete anti-seepage wall (2) are embedded in the secondary concrete (3).

6. The base device for connecting the asphalt concrete core wall and the dam foundation concrete seepage barrier wall according to claim 2, characterized in that, The seepage prevention unit includes two opposing second water-stop copper plates (6), which are connected to the base (1). The first water-stop copper plate (5) and the third water-stop copper plate (8) are connected to the opposite sides of the second water-stop copper plate (6). The first water-stop copper plate (5) is located near the top of the second water-stop copper plate (6), and the third water-stop copper plate (8) is located near the bottom of the second water-stop copper plate (6).

7. The base device for connecting the asphalt concrete core wall and the dam foundation concrete seepage barrier wall according to claim 6, characterized in that, A horizontal seam is provided in the base (1), and the second water-stop copper sheet (6) is connected in the horizontal seam. The space between the second water-stop copper sheet (6) and the horizontal seam is filled with horizontal seam material.

8. The base device for connecting the asphalt concrete core wall and the dam foundation concrete seepage barrier wall according to claim 6, characterized in that, An expansion sealing strip is provided between the two second water-stop copper sheets (6).

9. The base device for connecting the asphalt concrete core wall and the dam foundation concrete seepage barrier wall according to claim 1, characterized in that, The opposite side of the base (1) is set as an inclined surface, and the inclined surface is set near the bottom of the base (1).

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