An impervious structure and earth-rock dam

Abstract

The utility model provides a kind of anti-seepage structure and earth-rock dam, including original cut-off wall, pedestal is set on original cut-off wall, and the high cut-off wall of setting on the pedestal, the structural joint is formed between the pedestal with the original cut-off wall, and the structural joint is filled with flexible waterstop.The utility model can improve economy and environmental protection.

Description

Technical Field

[0001] This utility model relates to the field of heightening earth-rock dams in water conservancy projects, and particularly to a seepage prevention structure and an earth-rock dam. Background Technology

[0002] Reservoir expansion projects often involve raising earth-rock dams, for example, due to the need to increase the height of earth-rock dams for reservoir expansion. As the dam height increases, the top elevation of its seepage prevention system must also be raised accordingly. The treatment of the concrete cutoff wall is one of the key challenges in raising earth-rock dams. Currently, when the existing earth-rock dam's seepage prevention structure is a concrete cutoff wall, after the dam is raised, clay material is often filled into the dam crest to form a clay (seepage prevention) core wall or inclined wall. The original cutoff wall is then connected to the newly built clay core wall or inclined wall to jointly construct a new seepage prevention system. However, this method requires a large amount of clay. Furthermore, the extraction of clay damages the original landform, making restoration difficult. With increasing national emphasis on environmental protection and water conservation, and stricter policy regulations, the extraction of clay is becoming increasingly difficult, resulting in high costs and environmental unfriendliness for this type of seepage prevention system. Therefore, existing technologies often employ the method of rebuilding a concrete cutoff wall. However, this method discards the original cutoff wall, and the unit price of the newly built cutoff wall is high (the comprehensive unit price is about 2,000 yuan / m³), resulting in a large construction cost and poor economic efficiency. Furthermore, there are issues related to the treatment and discharge of mud generated during the construction of the new cutoff wall.

[0003] Therefore, it is necessary to propose a new seepage-proof structure to improve the economy and environmental protection when raising the height. Utility Model Content

[0004] The purpose of this utility model is to provide a seepage prevention structure and an earth-rock dam to solve the problems of poor economy and environmental protection when raising existing seepage prevention structures and earth-rock dams.

[0005] To solve the above-mentioned technical problems, this utility model provides a seepage prevention structure, including an original seepage prevention wall, a base set on the original seepage prevention wall, and a heightened seepage prevention wall set on the base. A structural joint is formed between the base and the original seepage prevention wall, and the structural joint is filled with a flexible water-stopping element.

[0006] Optionally, a cap beam is cast on top of the original seepage barrier wall.

[0007] Optionally, the base has a structural groove on the side facing the top of the original seepage barrier wall, and the top of the original seepage barrier wall is located in the structural groove.

[0008] Optionally, the cross-section of the structural groove is inverted U-shaped.

[0009] Optionally, the flexible waterstop includes a waterstop copper sheet and a polyethylene foam board, wherein the polyethylene foam board is disposed within the structural joint, and the waterstop copper sheet is disposed within the structural joint.

[0010] Optionally, an asphalt burlap sack is provided on the side of the base facing the top of the original seepage barrier.

[0011] Optionally, the number of asphalt sacks is three layers.

[0012] Optionally, the heightened anti-seepage wall is an asphalt concrete core wall.

[0013] This utility model also provides an earth-rock dam, including an upstream dam slope, a downstream dam slope, and the aforementioned seepage prevention structure located between the upstream dam slope and the downstream dam slope.

[0014] Optionally, a transition layer is provided between the upstream dam slope and the seepage prevention structure, and between the downstream dam slope and the seepage prevention structure.

[0015] The seepage-proof structure and earth-rock dam provided by this utility model have the following beneficial effects:

[0016] By setting a base on the original seepage barrier wall and then installing a raised seepage barrier wall on the base, a new seepage barrier wall can be formed by connecting the original and raised seepage barrier walls through the base. The base can also support the raised seepage barrier wall and connect the original and raised seepage barrier walls. A structural joint is formed between the base and the original seepage barrier wall, and the structural joint is filled with a flexible water-stopping element to ensure the reliability of the connection between the base and the original seepage barrier wall and the waterproof performance. In this way, the original seepage barrier wall can be fully utilized, avoiding the waste caused by abandoning the original seepage barrier wall and building a new one, thus improving economic efficiency. At the same time, it avoids the environmental damage caused by abandoning the original seepage barrier wall and building a new one, thus improving environmental protection. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the seepage-proof structure in an embodiment of this utility model;

[0018] Figure 2 yes Figure 1 A magnified view of a portion of the image.

[0019] Explanation of reference numerals in the attached figures:

[0020] 100 - Original seepage barrier wall; 110 - Cap beam; 200 - Base; 210 - Structural groove; 300 - Heightened seepage barrier wall; 510 - Water-stopping copper sheet; 520 - Polyethylene foam board; 600 - Asphalt burlap sack; 700 - Transition layer; 810 - Upstream dam slope; 820 - Downstream dam slope. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0022] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0023] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0024] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this utility model is in use. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0025] Furthermore, terms such as "horizontal" and "vertical" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0026] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0027] refer to Figure 1 and Figure 2 , Figure 1 This is a schematic diagram of the anti-seepage structure in an embodiment of this utility model. Figure 2 yes Figure 1 The enlarged schematic diagram shows that this embodiment provides a seepage prevention structure, including an original seepage prevention wall 100, a base 200 disposed on the original seepage prevention wall 100, and a heightened seepage prevention wall 300 disposed on the base 200. A structural joint is formed between the base 200 and the original seepage prevention wall 100, and the structural joint is filled with a flexible water-stopping element.

[0028] By setting a base 200 on the original cutoff wall 100, and then setting a heightened cutoff wall 300 on the base 200, a new cutoff wall can be formed by connecting the original cutoff wall 100 and the heightened cutoff wall 300 through the base 200. The base 200 can also support the heightened cutoff wall 300 and connect the original cutoff wall 100 and the heightened cutoff wall 300. A structural joint is formed between the base 200 and the original cutoff wall 100, and the structural joint is filled with a flexible water-stopping element to ensure the reliability of the connection and the waterproof performance between the base 200 and the original cutoff wall 100. In this way, the original cutoff wall 100 can be fully utilized, avoiding the waste caused by abandoning the original cutoff wall 100 and rebuilding a new cutoff wall, thus improving economic efficiency. At the same time, it avoids the environmental damage caused by abandoning the original cutoff wall 100 and rebuilding a new cutoff wall, thus improving environmental protection.

[0029] Preferably, a cap beam 110 is cast on the top of the original seepage barrier wall 100. This facilitates the connection between the base 200 and the original seepage barrier wall 100, and also facilitates the installation of the flexible waterstop, ensuring the water-stopping performance of the flexible waterstop after installation.

[0030] Furthermore, the cap beam 110 has an installation groove on the side facing the top of the original seepage barrier 100, and the top of the original seepage barrier 100 is located in the installation groove.

[0031] Preferably, the base 200 has a structural groove 210 on the side facing the top of the original seepage barrier 100, and the top (cap beam 110) of the original seepage barrier 100 is located in the structural groove 210. This improves the reliability of the connection between the base 200 and the original seepage barrier 100, while also extending the seepage path and improving the seepage prevention effect.

[0032] Preferably, the cross-section of the structural groove 210 is inverted U-shaped.

[0033] The flexible water-stopping component includes a water-stopping copper sheet 510 and a polyethylene foam board 520. The polyethylene foam board 520 is disposed within the structural joint, and the water-stopping copper sheet 510 is disposed within the structural joint.

[0034] Preferably, an asphalt burlap sack 600 is provided on the side of the base 200 facing the top of the original seepage barrier 100 to extend the seepage path and increase the reliability of the seepage prevention measures at the structural joint.

[0035] Furthermore, the asphalt sacks 600 are in three layers.

[0036] Furthermore, the heightened anti-seepage wall 300 is an asphalt concrete core wall.

[0037] An earth-rock dam includes an upstream slope 810, a downstream slope 820, and the aforementioned seepage prevention structure located between the upstream slope 810 and the downstream slope 820.

[0038] Preferably, a transition layer 700 is provided between the upstream dam slope 810 and the seepage prevention structure, and between the downstream dam slope 820 and the seepage prevention structure.

[0039] In this embodiment, the construction process of the seepage prevention structure is as follows:

[0040] Step 1: Remove the original dam top structure to the elevation below the top of the original cutoff wall 100, so that the top of the original cutoff wall 100 is exposed and a construction platform is formed.

[0041] Step 2: Lay asphalt burlap bags 600 on the upstream and downstream sides of the original seepage barrier wall 100, so that the asphalt burlap bags 600 are in contact with the original seepage barrier wall 100.

[0042] Step 3: Pour concrete on the top of the original seepage barrier wall 100 to form a cap beam 110, wrap the top of the original seepage barrier wall 100 with the cap beam 110, and pre-embed a horizontal water-stop copper plate 510 on the top of the cap beam 110.

[0043] Step 4: Lay polyethylene foam board 520 along the top and upstream and downstream sides of the cap beam 110 to fill the structural joints.

[0044] Step 5: Pour concrete base 200 to connect base 200 with cap beam 110.

[0045] Step 6: Fill the raised section of the earth-rock dam body. On the foundation 200, fill the asphalt concrete core wall and the upstream and downstream transition layer 700. At the same time, fill the upstream and downstream dam shell materials. The raised section of the earth-rock dam body, the asphalt concrete core wall, the upstream and downstream transition layer 700 and the upstream and downstream dam shell materials should be filled and raised simultaneously.

[0046] The above description is only a description of the preferred embodiment of the present utility model and is not intended to limit the scope of the present utility model in any way. Any changes or modifications made by those skilled in the art based on the above disclosure shall fall within the protection scope of the claims.

Claims

1. A seepage-proof structure, comprising an original seepage-proof wall, characterized in that, It also includes a base set on the original seepage barrier wall, and a raised seepage barrier wall set on the base, wherein a structural joint is formed between the base and the original seepage barrier wall, and the structural joint is filled with a flexible water-stopping element.

2. The seepage-proof structure as described in claim 1, characterized in that, The original seepage barrier wall was topped with a cap beam.

3. The seepage-proof structure as described in claim 1, characterized in that, The base has a structural groove on the side facing the top of the original seepage barrier wall, and the top of the original seepage barrier wall is located in the structural groove.

4. The seepage-proof structure as described in claim 3, characterized in that, The cross-section of the groove in the structure is inverted U-shaped.

5. The seepage-proof structure as described in claim 1, characterized in that, The flexible water-stopping component includes a water-stopping copper sheet and a polyethylene foam board, wherein the polyethylene foam board is disposed within the structural joint and the water-stopping copper sheet is disposed within the structural joint.

6. The seepage-proof structure as described in claim 1, characterized in that, Asphalt burlap sacks are placed on the side of the base facing the top of the original seepage barrier.

7. The seepage-proof structure as described in claim 6, characterized in that, The asphalt sacks are in three layers.

8. The seepage-proof structure as described in claim 1, characterized in that, The heightened anti-seepage wall is an asphalt concrete core wall.

9. An earth-rock dam, characterized in that, It includes an upstream dam slope, a downstream dam slope, and a seepage prevention structure located between the upstream and downstream dam slopes as described in any one of claims 1-8.

10. The earth-rock dam as described in claim 9, characterized in that, A transition layer is provided between the upstream dam slope and the seepage prevention structure, and between the downstream dam slope and the seepage prevention structure.

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