A clay core dam reconstruction overflow dam structure

Abstract

This utility model provides a structure for converting a clay core dam into an overflow dam, including a spillway excavated along the top of the clay core dam to the bottom of the downstream side. A spillway bottom slab is poured below the spillway, and side walls are poured on both sides of the spillway bottom slab. The height of the side walls is not lower than that of the clay core dam on both sides. An overflow weir is poured on the spillway bottom slab, and the overflow weir is located in the direction of the top of the clay core dam. The two sides of the overflow weir are connected to the side walls, and the height of the overflow weir is lower than that of the clay core dam on both sides. An anti-seepage wall is embedded in the clay core dam below the overflow weir. The overflow dam is converted on the clay core dam to ensure that the converted clay core dam has a certain discharge capacity, thereby enhancing the flood control capacity of the reservoir.

Description

Technical Field

[0001] This utility model relates to the field of water conservancy and hydropower technology, and in particular to a structure for converting a clay core wall dam into an overflow dam. Background Technology

[0002] Clay-core dams are earth-rock dams that use cohesive soil with a low permeability coefficient as a seepage barrier, filled in the center of the dam body. Clay-core dams are typically constructed in a single phase and then impound water to provide benefits such as power generation and flood control. However, after some dams have been in operation for a period of time, it is necessary to add spillway structures to ensure the dam has a certain discharge capacity and enhance the reservoir's flood control capabilities. Currently, clay-core dams usually utilize the method of constructing new spillway structures on the banks to achieve their discharge capacity. However, some small reservoirs with clay-core dams are situated on both sides of high mountains, lacking the terrain conditions for constructing new spillway structures. Utility Model Content

[0003] The purpose of this invention is to overcome the shortcomings of the prior art and provide a structure for converting a clay core dam into an overflow dam, which can solve the problem that traditional clay core dams do not have the ability to discharge water.

[0004] Therefore, the present invention adopts the following technical solution:

[0005] A structure for converting a clay core dam into an overflow dam includes a spillway excavated along the dam crest to the downstream dam bottom of the clay core dam. A spillway bottom slab is cast below the spillway, and side walls are cast on both sides of the spillway bottom slab. The height of the side walls is not lower than that of the clay core dam on both sides. An overflow weir is cast on the spillway bottom slab. The overflow weir is located at the dam crest excavation of the clay core dam, and its two sides are connected to the side walls. The height of the overflow weir is lower than that of the clay core dam on both sides. A seepage prevention wall embedded in the clay core dam is provided below the overflow weir.

[0006] Based on the above technical solutions, the present invention may also adopt the following further technical solutions, or combine these further technical solutions:

[0007] A toothed wall is cast beneath the bottom plate of the trough, and the bottom plate of the trough and the toothed wall are cast integrally.

[0008] A flow-through sill is poured at the outlet of the discharge channel.

[0009] The side walls are also provided on both sides of the nose sill.

[0010] The overflow weir, the bottom plate of the spillway, the seepage prevention wall, the toothed wall, the side wall, and the spillway nose sill are all made of reinforced concrete.

[0011] Compared with the prior art, this utility model has the following advantages and beneficial effects: by reconstructing an overflow dam on a clay core dam, the reconstructed clay core dam is guaranteed to have a certain discharge capacity, thereby enhancing the flood control and flood season management capabilities of the reservoir. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of this utility model.

[0013] Figure 2 and Figure 3 This is a typical cross-sectional view of the present invention. Detailed Implementation

[0014] To enable those skilled in the art to better understand the technical solution of this utility model, the preferred embodiments of this utility model are described below in conjunction with specific examples. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote elements with the same or similar functions throughout. However, it should be understood that the drawings are for illustrative purposes only and should not be construed as limiting this utility model. To better illustrate this embodiment, some parts in the drawings may be omitted, enlarged, or reduced, and do not represent the actual product size. It is understandable for those skilled in the art that some well-known structures and their descriptions may be omitted in the drawings. The positional relationships described in the drawings are for illustrative purposes only and should not be construed as limiting this utility model.

[0015] The present invention will be further described below with reference to the accompanying drawings and embodiments, but this should not be construed as limiting the present invention.

[0016] This utility model provides a structure for converting a clay core dam into an overflow dam, including a spillway 2 excavated along the top of the clay core dam to the bottom of the downstream side. A spillway bottom slab 21 is cast below the spillway 2. Side walls 5 are cast on both sides of the spillway bottom slab 21. The height of the side walls 5 is not lower than that of the clay core dam on both sides. An overflow weir 1 is cast on the spillway bottom slab 21. The overflow weir 1 is located at the excavation point on the top of the clay core dam. The two sides of the overflow weir 1 are connected to the side walls 5. The height of the overflow weir 1 is lower than that of the clay core dam on both sides. An anti-seepage wall 3 embedded in the clay core dam is provided below the overflow weir 1.

[0017] A toothed wall 4 is cast beneath the bottom plate 21 of the drainage channel, and the bottom plate 21 and the toothed wall 4 are cast integrally.

[0018] A flow-through sill 6 is poured at the outlet of the discharge channel 2.

[0019] The side walls 5 are also provided on both sides of the nose sill 6.

[0020] The overflow weir 1, the bottom plate 21 of the spillway, the anti-seepage wall 3, the toothed wall 4, the side wall 5, and the spillway nose sill 6 are all made of reinforced concrete. The anti-seepage wall 3 is used to reduce the risk of interlayer leakage between the newly built concrete structure and the clay core wall dam. The toothed wall 4 is arranged at the bottom of the overflow weir 1 and the spillway 2 and is poured at the same time as the main structure to ensure that the overflow structure does not slide or deform during the water flow process. The height of the side wall 5 at the top of the dam should not be lower than the top elevation of the clay core wall dam on both sides or the top elevation of the wave wall.

[0021] The overflow dam structure of this utility model needs to be constructed during the dry season of the reservoir. The dam crest needs to be rebuilt after the clay core wall dam is removed, and trenches are dug at equal intervals on the dam crest and downstream slope. The highest overflow water level of the newly built weir crest should not be higher than the original engineering check flood level.

[0022] The newly built overflow weir 1 is arranged on the top of the excavated dam. A certain space needs to be left in front of the overflow weir 1 as an intake channel for smooth water flow.

[0023] Based on the description and drawings of this utility model, those skilled in the art can easily manufacture or use the clay core wall dam to overflow dam structure of this utility model, and can produce the positive effects described in this utility model.

[0024] It should be noted that the terms "comprising" and "having," and any variations thereof, in the specification, claims, and accompanying drawings of this utility model are intended to cover non-exclusive inclusion. The terms "installed," "set," "equipped with," "connected," "connected," and "sleeve-in" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral structure; 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, or an internal connection between two mechanisms, elements, or components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0025] In the description of this utility model, it should be understood that the terms "one end," "the other end," "outer side," "inner side," "horizontal," "end," "length," "outer end," "left," and "right," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the mechanism 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. The terms "first" and "second" are also used only for the sake of brevity in description and do not indicate or imply relative importance.

[0026] Furthermore, in practicing the claims of this utility model, those skilled in the art can understand and influence variations to the disclosed embodiments through a study of the drawings, the disclosure, and the appended claims. Additionally, in the claims and description, words such as "comprising" and "containing" do not exclude other elements or steps, and non-plural nouns do not exclude their plural forms.

[0027] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the scope of the present utility model. All equivalent changes and modifications made in accordance with the present utility model are covered by the scope of the claims of the present utility model, and will not be listed here.

Claims

1. A structure for converting a clay core dam into an overflow dam, characterized in that, The system includes a spillway (2) excavated along the top of the clay core dam to the bottom of the downstream side. A spillway bottom plate (21) is poured below the spillway (2). Side walls (5) are poured on both sides of the spillway bottom plate (21). The height of the side walls (5) is not lower than that of the clay core dam on both sides. An overflow weir (1) is poured on the spillway bottom plate (21). The overflow weir (1) is located at the excavation point on the top of the clay core dam. The two sides of the overflow weir (1) are connected to the side walls (5). The height of the overflow weir (1) is lower than that of the clay core dam on both sides. An anti-seepage wall (3) is embedded in the clay core dam below the overflow weir (1).

2. The structure for converting a clay core dam into an overflow dam as described in claim 1, characterized in that, A toothed wall (4) is cast under the bottom plate (21) of the trough, and the bottom plate (21) and the toothed wall (4) are cast as a whole.

3. A clay core dam to overflow dam conversion structure as described in claim 1 or 2, characterized in that, The outlet of the chute (2) is filled with a flow-through nose sill (6).

4. The structure for converting a clay core dam into an overflow dam as described in claim 3, characterized in that, The side walls (5) are also provided on both sides of the nose sill (6).

5. The structure for converting a clay core dam into an overflow dam as described in claim 3, characterized in that, The overflow weir (1), the bottom plate of the spillway (21), the seepage prevention wall (3), the toothed wall (4), the side wall (5), and the spillway nose sill (6) are all made of reinforced concrete.

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