Cross-gully flood diversion ditch with dam slope protection function

Abstract

The utility model provides a kind of across branch ditch flood diversion ditch of dam slope protection function, belong to tailing pond technical field, including accumulation dam slope and branch ditch upstream, including branch ditch outer flood diversion ditch main body, retaining wall, slag barrier and branch ditch flood water energy dissipation area, the retaining wall is equipped with three, one retaining wall is located in branch ditch outer flood diversion ditch main body near accumulation dam slope, and the other two retaining walls are located between branch ditch upstream and branch ditch outer flood diversion ditch main body;The slag barrier is located at retaining wall import, and three retaining walls and slag barrier enclosed area constitute branch ditch flood water energy dissipation area.The utility model changes open branch ditch flood water energy dissipation area from closed open channel structure to traditional branch ditch flood diversion ditch, under the premise of guaranteeing flood diversion ditch normal flood discharge effect, strengthens the protection to accumulation dam slope, and can improve tailing pond dam safety.

Description

Technical Field

[0001] This utility model relates to the field of tailings dam technology, and in particular to a cross-tributary ditch flood interception ditch that also serves as a dam slope protection function. Background Technology

[0002] As a crucial infrastructure component of mining enterprises, the safety of the downstream slope of tailings dams is paramount. Typically, intercepting ditches are constructed at the junction of the tailings dam and the mountainside to block incoming water and reduce erosion from rainfall. Due to the complex terrain of mountainous areas, tributary gullies inevitably exist along the slopes of the tailings dam. These tributary gullies are often characterized by high mountains, steep slopes, and deep valleys, resulting in well-developed erosion gullies. Consequently, tributary floods are characterized by their sudden onset, short duration, and high destructive power.

[0003] Publication No. CN222632169U discloses an external interception ditch structure for mine restoration and management projects, including a ditch body comprising a ditch bottom, a first ditch wall, and a second ditch wall. The first ditch wall is located at the end of the ditch bottom near the mine closure site, and the second ditch wall is located at the end of the ditch bottom away from the mine closure site. The water-facing slope of the ditch body is made of fresh bedrock. The ditch bottom and the first ditch wall are both made of reinforced concrete, while the second ditch wall is made of permeable brick masonry. This utility model excavates the water-facing slope of the ditch body to the fresh bedrock surface, utilizing the characteristics of fresh bedrock surface being unaffected by weathering and having higher strength and stability, ensuring the long-term stability and safety of the ditch body. Furthermore, the ditch bottom and the first ditch wall are made of reinforced concrete, while the second ditch wall is made of permeable brick masonry, ensuring the stability and durability of the ditch body. Simultaneously, surface water can be smoothly discharged into the ditch body through the second ditch wall, effectively preventing water accumulation. It is not suitable for protecting dams.

[0004] In recent years, extreme weather events have become more frequent. Based on practical engineering experience, traditional intercepting ditches on the shoulders of dams have limited ability to resist floods from tributaries. Sudden heavy rainfall in tributaries, carrying sediment and rocks, can easily cause devastating damage to the sidewalls of traditional intercepting ditches, which in turn can erode the slopes of accumulation dams and block flood discharge channels, leading to the instability of tailings dams. To solve the above problems, this invention innovates a type of intercepting ditches that spans tributaries and also provides slope protection. Utility Model Content

[0005] To overcome the limited ability of traditional intercepting ditches to withstand floods from tributaries, and the problem that sudden heavy rainfall in tributaries can carry mud, sand, and rocks, causing devastating damage to the sidewalls of traditional intercepting ditches, which in turn can erode the slopes of tailings dams and block the flood discharge channels, leading to tailings dam instability, this utility model provides a cross-tributary intercepting ditch that also serves as a dam slope protection function. This utility model transforms the traditional tributary intercepting ditch from a closed open channel structure into an open flood energy dissipation zone. While ensuring the normal flood discharge function of the intercepting ditch, it strengthens the protection of the tailings dam slope, thereby improving the safety of the tailings dam body.

[0006] The technical solution adopted in this utility model is as follows: A flood interception ditch that also serves as a dam slope protection mechanism across a tributary includes a dam slope and the upstream of the tributary. It comprises the main body of the flood interception ditch outside the tributary, retaining walls, a debris-trapping grid, and a flood energy dissipation zone for the tributary. Three retaining walls are provided: one is located near the dam slope of the main body of the flood interception ditch outside the tributary, and the other two are located between the upstream of the tributary and the main body of the flood interception ditch outside the tributary. The debris-trapping grid is located at the inlet of the retaining walls. The area enclosed by the three retaining walls and the debris-trapping grid constitutes the flood energy dissipation zone for the tributary.

[0007] The aforementioned tributary flood energy dissipation zone is equipped with a tributary flood energy dissipation zone floor slab.

[0008] The retaining wall shall be at least 2.0m high and at least 5.0m long.

[0009] The retaining wall is a concrete gravity structure.

[0010] The two retaining walls located between the main body of the flood interception ditch outside the tributary and the upstream of the tributary are arranged in a figure-eight shape.

[0011] The aforementioned slag-blocking grid is constructed by welding I-beams and channels into a mesh structure.

[0012] The bottom of the I-beam extends into the concrete base, and the two sides of the channel steel extend into the stable rock mass on both banks.

[0013] The anchorage depth of the I-beams and channel steel shall not be less than 50cm.

[0014] The height of the slag-blocking grid is not less than 1.5m.

[0015] The beneficial effects of this utility model are: This utility model transforms the traditional branch ditch interception ditch from a closed open channel structure into an open energy dissipation and scour prevention structure. Its purpose is to provide a cross-branch ditch interception ditch with slope protection function. While ensuring the normal flood discharge function of the interception ditch, it strengthens the protection of the dam slope and can improve the safety of the tailings dam body. Attached Figure Description

[0016] Figure 1 Plan view of the flood interception ditch spanning the tributary.

[0017] Figure 2 Cross-sectional view of the intercepting ditch outside the tributary.

[0018] Figure 3 Cross-sectional view of the flood interception ditch spanning the tributary.

[0019] Figure 4 Cross-sectional view of the slag-blocking grating.

[0020] In the figure, the attached figures are labeled as follows: 1. Main body of the intercepting ditch outside the branch ditch; 2. Retaining wall; 3. Slag barrier; 4. Bottom plate of the flood energy dissipation zone of the branch ditch; 5. I-beam; 6. Channel steel; 7. Slope of the accumulation dam; 8. Upstream of the branch ditch; 9. Flood energy dissipation zone of the branch ditch. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0022] The accompanying drawings show various structural schematic diagrams according to embodiments of the present invention. These drawings are not to scale, and some details have been enlarged and may have been omitted for clarity. The shapes of the various regions and layers shown in the drawings, as well as their relative sizes and positional relationships, are merely exemplary and may deviate from reality due to manufacturing tolerances or technical limitations. Furthermore, those skilled in the art can design regions / layers with different shapes, sizes, and relative positions as needed.

[0023] Example 1: To overcome the limited resistance of traditional intercepting ditches to floodwaters from tributaries, and the problem that sudden heavy rainfall carrying silt and rocks can easily cause devastating damage to the sidewalls of traditional intercepting ditches, thereby eroding the slopes of the tailings dam and blocking the flood discharge channel, leading to tailings dam instability, this utility model provides... Figure 1 - 4 shows a cross-tributary intercepting ditch that also serves as a dam slope protection function. This utility model transforms the traditional tributary intercepting ditch from a closed open channel structure into an open tributary flood energy dissipation zone. While ensuring the normal flood discharge function of the intercepting ditch, it strengthens the protection of the tailings dam slope and can improve the safety of the tailings dam body.

[0024] A flood interception ditch that also serves as a dam slope protection mechanism across a tributary includes a dam slope 7 and an upstream section 8 of the tributary. It comprises the main body 1 of the tributary flood interception ditch, retaining walls 2, a debris-trapping grid 3, and a flood energy dissipation zone 9 of the tributary. The retaining walls 2 are provided in three locations, one of which is located near the dam slope 7 of the main body 1 of the tributary flood interception ditch, and the other two are located between the upstream section 8 of the tributary and the main body 1 of the tributary flood interception ditch. The debris-trapping grid 3 is located at the inlet of the retaining walls 2. The area enclosed by the three retaining walls 2 and the debris-trapping grid 3 constitutes the flood energy dissipation zone 9 of the tributary.

[0025] like Figure 1As shown, in this utility model, a gravity retaining wall 2 is constructed at the bottom of the slope near the dam slope 7 within the tributary ditch area, replacing the traditional flood interception ditch sidewall. The traditional flood interception ditch sidewall is removed on the side near the tributary ditch, and two retaining walls 2 are constructed upstream along both banks of the tributary ditch. These two retaining walls 2 are distributed in a V-shape to form a V-shaped gravity retaining wall. A debris-trapping grid 3 is arranged at the entrance of the V-shaped gravity retaining wall. The area enclosed by the three retaining walls 2 and the debris-trapping grid 3 constitutes the flood energy dissipation zone 9 of the tributary ditch.

[0026] In use, this utility model uses a debris-blocking grid 3 to intercept upstream rocks and debris. After the tributary floodwaters enter the tributary flood energy dissipation zone 9, their kinetic energy is dissipated, and the flow stabilizes before being diverted downstream through the intercepting ditch. The debris-blocking grid 3 effectively reduces the scouring and damage of falling rocks to the dam slope 7 and the intercepting facilities, preventing clogging of the drainage system. The three retaining walls 2 strengthen the protection of the dam slope 7 and the mountainsides on both sides of the tributary, and also improve the dam slope's resistance to scouring by tributary floodwaters. This utility model effectively reduces the risk of debris flows in the tributary and strengthens the protection of the dam slope 7.

[0027] Example 2: Based on Embodiment 1, in this embodiment, preferably, the tributary flood energy dissipation zone 9 is provided with a tributary flood energy dissipation zone bottom plate 4.

[0028] Preferably, the retaining wall 2 has a height of not less than 2.0m and a length of not less than 5.0m.

[0029] Preferably, the retaining wall 2 is a concrete gravity structure.

[0030] Concrete gravity structures are existing and mature structures, and will not be further described in this utility model.

[0031] Preferably, the two retaining walls 2 located between the main body 1 of the flood interception ditch outside the tributary and the upstream 8 of the tributary are arranged in a V-shape.

[0032] Preferably, the slag-blocking grid 3 is made of I-beams 5 and channel steel 6 welded into a mesh structure.

[0033] Preferably, the bottom of the I-beam 5 extends into the concrete base, and the two sides of the channel steel 6 extend into the stable rock mass on both banks.

[0034] Preferably, the anchoring depth of the I-beam 5 and the channel steel 6 is not less than 50cm.

[0035] Preferably, the height of the slag-blocking grid 3 is not less than 1.5m.

[0036] like Figure 3 and Figure 4As shown, the slag-blocking grid 3 is constructed from I-beams 5 and channel steel 6 welded into a mesh structure to ensure its stability and good slag-blocking effect. The height of the slag-blocking grid 3 can be set according to requirements, as long as it is not less than 1.5mm to ensure a good slag-blocking effect.

[0037] The specific implementation process of this utility model is as follows: When the dam is built to the location of the tributary, the energy dissipation area is leveled first, the surface colluvial material and organic matter are removed, and the excavation is carried out down to the stable bedrock.

[0038] The construction of three retaining walls 2 was completed. Retaining walls 2 adopt a concrete gravity structure. The dimensions of retaining walls 2 need to be determined based on factors such as the scale of the tributary ditch, the main body 1 of the intercepting ditch outside the tributary ditch, the bank slope height, and the stability of the wall itself. To ensure good dam slope protection and sufficient energy dissipation space, the height of retaining walls 2 shall not be less than 2.0m, and the length of retaining walls shall not be less than 5.0m.

[0039] Complete the construction of the tributary flood energy dissipation zone 9, the tributary flood energy dissipation zone bottom slab 4. The material of the tributary flood energy dissipation zone bottom slab 4 can be consistent with the material of the main body 1 of the tributary intercepting ditch, or a shock-resistant material can be selected according to the actual site conditions.

[0040] Complete the construction of the slag-trapping grid 3 at the inlet of the two V-shaped retaining walls 2. The slag-trapping grid 3 is a mesh structure welded from I-beams 5 and channel steel 6. The bottom of the I-beams 5 extends into the concrete base, and the two sides of the channel steel 6 extend into the stable rock mass on both banks, with an anchoring depth of not less than 50cm. To ensure a good slag-trapping effect, the height of the slag-trapping grid 3 is not less than 1.5m.

[0041] When encountering heavy rainfall in tributary ditches, the operation mode of the flood interception ditch provided by this utility model is as follows: The debris-trapping grid 3 intercepts upstream rocks and debris. After the floodwater from the tributary enters the tributary flood energy dissipation zone 9, its kinetic energy is dissipated, and the flow stabilizes before being diverted downstream through the intercepting ditch. The debris-trapping grid 3 effectively reduces the scouring and damage of falling rocks to the slope 7 of the accumulation dam and the flood interception facilities, and prevents siltation of the flood discharge system.

[0042] like Figure 1 and Figure 2 As shown, in this utility model, the setting of three retaining walls 2 strengthens the protection of the dam slope 7 and the mountains on both sides of the tributary ditch, and improves the dam slope's resistance to floods from the tributary ditch.

[0043] The intercepting ditch provided by this utility model can effectively reduce the risk of debris flow in tributary ditches and strengthen the protection of the slope of the accumulation dam.

[0044] This invention transforms the traditional tributary intercepting ditch from a closed open channel structure into an open energy dissipation and scour prevention structure (tributary flood energy dissipation zone 9). While ensuring the normal flood discharge function of the intercepting ditch, this invention strengthens the protection of the tailings dam slope 7, thereby improving the safety of the tailings dam body.

[0045] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" 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.

[0046] It should also be understood that the terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to limit the scope of the invention. As used in this specification and the appended claims, the singular forms “a,” “an,” and “the” are intended to include the plural forms unless the context clearly indicates otherwise.

[0047] The examples above are merely illustrative of this utility model and do not constitute a limitation on the scope of protection of this utility model. All designs that are identical or similar to this utility model fall within the scope of protection of this utility model. Device structures and method steps not described in detail in this utility model are existing technologies and will not be further described in this utility model.

Claims

1. A flood interception ditch spanning a tributary ditch, which also serves as a dam slope protection function, comprising a dam slope (7) and an upstream section of the tributary ditch (8), characterized in that: The system includes the main body of the tributary intercepting ditch (1), retaining walls (2), slag traps (3), and the tributary flood energy dissipation zone (9). There are three retaining walls (2), one of which is located near the slope of the dam (7) of the tributary intercepting ditch main body (1), and the other two retaining walls (2) are located between the upstream (8) of the tributary and the main body of the tributary intercepting ditch (1). The slag traps (3) are located at the inlet of the retaining walls (2). The area enclosed by the three retaining walls (2) and the slag traps (3) constitutes the tributary flood energy dissipation zone (9).

2. A flood interception ditch spanning a tributary ditch with dam slope protection function as described in claim 1, characterized in that: The tributary flood energy dissipation zone (9) is provided with a tributary flood energy dissipation zone bottom plate (4).

3. A flood interception ditch spanning a tributary ditch with dam slope protection function as described in claim 1, characterized in that: The retaining wall (2) shall be at least 2.0m high and at least 5.0m long.

4. A flood interception ditch spanning a tributary ditch with dam slope protection function as described in claim 1, characterized in that: The retaining wall (2) is a concrete gravity structure.

5. A flood interception ditch spanning a tributary ditch with dam slope protection function as described in claim 1, characterized in that: The two retaining walls (2) located between the main body (1) of the flood interception ditch outside the branch ditch and the upstream (8) of the branch ditch are arranged in a figure-eight shape.

6. A flood interception ditch spanning a tributary ditch with dam slope protection function as described in claim 1, characterized in that: The slag-blocking grid (3) is made of I-beams (5) and channel steel (6) welded into a mesh structure.

7. A flood interception ditch spanning a tributary ditch with dam slope protection function as described in claim 6, characterized in that: The bottom of the I-beam (5) extends into the concrete base, and the two sides of the channel steel (6) extend into the stable rock mass on both banks.

8. A flood interception ditch spanning a tributary ditch with dam slope protection function as described in claim 7, characterized in that: The anchorage depth of the I-beam (5) and channel steel (6) shall not be less than 50cm.

9. A flood interception ditch spanning a tributary ditch with dam slope protection function as described in claim 1, characterized in that: The height of the slag-blocking grid (3) is not less than 1.5m.

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