Anti-seepage pollution discharge structure of flat ground type anti-seepage dry storage yard
By building blocking dams and flood control sewage regulation tanks in a flat-scale anti-seepage dry yard, and combining the permeable rock dam section and transition layer, HDPE pipes are buried as sewage overflow pipes, the problem of traditional drainage wells destroying the anti-seepage layer at the interface of the HDPE membrane is solved, and the sewage overflow flow and the integrity of the anti-seepage layer are achieved, reducing environmental protection risks and engineering costs.
Patent Information
- Application Number
- CN202421073570.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-17
- Publication Date
- 2025-05-09
- Estimated Expiration
- 2034-05-17
AI Technical Summary
Traditional flat-ground anti-seepage dry yards can easily destroy the integrity of the anti-seepage layer at the interface of the drain well passing through the HDPE membrane, resulting in the risk of environmental protection risks of pollutants being dispersed. At the same time, the drain pipes are susceptible to load-affecting accidents such as breakage and collapse.
By building blocking dams around the yard and setting up a flood control sewage regulation pool downstream, combining the permeable rock dam section and transition layer, HDPE pipes are buried as sewage overflow pipes to ensure smooth sewage overflow and avoid damage to the anti-seepage layer.
It effectively avoids rainwater accumulation in the reservoir, affecting the stable discharge of sewage, reducing the environmental protection risk of sewage outflow, maintaining the integrity of the anti-seepage structural layer, reducing the spread of pollution, and low project cost, solving the contradiction between flood control and pollution discharge and high environmental protection requirements.
Smart Images
Figure CN222847414U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of environmentally friendly solid waste treatment, in particular to an anti-seepage and sewage discharge system structure technology for a flat-land type general industrial solid waste dry storage yard requiring horizontal anti-seepage. Background Art
[0002] Anti-seepage dry landfills are generally divided into valley type, mountainside type with dams on three sides, and flat type with dams on four sides according to the terrain of the area where they are located. In order to increase the storage capacity, dry landfills usually adopt the method of piling up above the retaining dam (dike) to store (fill) general industrial solid waste in the later stage. At the same time, in order to meet environmental protection requirements, general industrial solid waste Class II waste landfills and general industrial solid waste Class I waste landfills that do not meet the natural foundation layer requirements in the "General Industrial Solid Waste Storage and Landfill Pollution Control Standards" (GB 18599-2020) will adopt HDPE membranes and other anti-seepage methods to achieve horizontal anti-seepage of the entire reservoir.
[0003] The traditional flat-land anti-seepage dry storage yard is surrounded by a traditional retaining dam 21, a traditional flood control sewage regulating pool 22 is located downstream, a traditional anti-seepage layer 23 is set at the bottom of the yard, and a traditional anti-seepage layer anchoring ditch 24 is set on the traditional retaining dam 21 to fix the traditional anti-seepage layer 23. The traditional solid waste pile 25 generally adopts a storage method of discharging from the surroundings to the middle, and a drainage well 8 and a drainage pipe 9 are set in the storage to form a sewage system. The specific structure is as follows Figure 1 , 2 As shown, the discharge and storage method around the reservoir is that solid waste is pushed from the periphery to the middle of the reservoir, and the periphery is always kept high and the middle is low. At the same time, a drainage shaft + drainage pipe drainage facility is set in the center of the reservoir to discharge rainwater and flood water on the slope of the reservoir (which becomes sewage after passing through the pile) out of the reservoir.
[0004] The storage method of peripheral discharge requires the interface treatment of the drainage well through the HDPE membrane, which is easy to damage the integrity of the anti-seepage layer such as the HDPE membrane, making the connection between the anti-seepage layer and the drainage shaft the weak link of the entire yard, thereby creating the environmental risk of pollutants in the yard being released. At the same time, the investment in drainage pipes is high, and due to the large load on the upper yard, it is easy to cause accidents such as drainage pipe breakage and collapse, making emergency rescue and management difficult after the accident. Summary of the invention
[0005] In order to solve the above technical problems, the purpose of the utility model is to provide an anti-seepage sewage discharge structure for a flat-ground anti-seepage dry yard. By changing the setting of the drainage pipe, it can avoid damaging the integrity of the anti-seepage layer and ensure smooth overflow of sewage.
[0006] To achieve the above purpose, the utility model is implemented through the following technical solutions:
[0007] An anti-seepage sewage discharge structure for a flat-land anti-seepage dry storage yard is characterized in that: it includes a retaining dam built around the flat-land anti-seepage dry storage yard, a flood control sewage regulating tank is arranged downstream of one section of the retaining dam, a permeable rockfill dam section is arranged in the area where the retaining dam and the flood control sewage regulating tank meet, and an anti-seepage layer is laid in the storage yard storage area enclosed by the retaining dam, the inner side of the retaining dam and the inside of the flood control sewage regulating tank; the upper dam body of the permeable rockfill dam section is built on the top of the laid anti-seepage layer, a transition layer is arranged on the side of the permeable rockfill dam section close to the storage yard and between the permeable rockfill dam section and the anti-seepage layer, and a plurality of sewage overflow pipes are buried in the permeable rockfill dam section to connect the storage yard storage area with the flood control sewage regulating tank.
[0008] Furthermore, the anti-seepage layer uses HDPE geomembrane as the anti-seepage material. To prevent penetration at the interface, the anti-seepage layer of the storage yard area enclosed by the retaining dam and the inner side of the retaining dam and the flood control sewage regulating tank is laid as a whole.
[0009] Furthermore, the sewage overflow pipe is a HDPE pipe, which is buried in multiple layers at different depths in the permeable rockfill dam to ensure that as the solid waste pile is discharged and piled up, the inlet elevation of the overflow HDPE pipe can be kept higher than the solid waste storage surface.
[0010] Furthermore, the anti-seepage layer is fixed by an anti-seepage layer anchoring ditch arranged on the retaining dam and the periphery of the flood control sewage regulating tank.
[0011] The anti-seepage and sewage discharge structure of the flat-ground anti-seepage dry-type storage yard of the utility model can prevent rainwater from accumulating in the reservoir and affecting the stable discharge of sewage, which is beneficial to ensuring the flood control safety and stability of the storage yard and reducing the environmental protection risk of sewage seepage. At the same time, it maintains the integrity of the anti-seepage structure layer of the storage yard, avoids or reduces the spread of pollution, and has the advantages of low project cost. It solves the contradiction between flood control and sewage discharge of flat-ground anti-seepage dry-type storage yard and high environmental protection requirements, can save investment for enterprises, reduce environmental protection risks, and achieve good economic and environmental benefits. BRIEF DESCRIPTION OF THE DRAWINGS
[0012] Figure 1 It is a schematic diagram of the traditional flat-land anti-seepage dry storage yard storage method and sewage system structure;
[0013] Figure 2 for Figure 1 Ⅰ-Ⅰ cross-sectional diagram;
[0014] Figure 3 It is a schematic plan view of an anti-seepage and sewage discharge structure of a flat-ground anti-seepage dry storage yard of the utility model;
[0015] Figure 4 for Figure 3 Middle Ⅰ-Ⅰ section schematic diagram;
[0016] Figure 5for Figure 3 Schematic diagram of the section III-III;
[0017] Figure 6 for Figure 3 Schematic diagram of the middle IV-IV section;
[0018] Figure 7 For attachment Figure 3 Middle V-V section schematic diagram;
[0019] In the figure: 1. retaining dam, 2. flood control sewage regulating pool, 3. impermeable layer, 4. anchoring ditch of impermeable layer, 5. repair and covering slope of accumulation slope, 6. solid waste pile, 7. boundary line of solid waste pile, 8. drainage well, 9. drainage pipe, 10. permeable rockfill dam section, 11. rockfill dam body, 12. transition layer, 13. sewage overflow pipe, 14. outer slope of solid waste pile, 21. traditional retaining dam, 22. traditional flood control sewage regulating pool, 23. traditional impermeable layer, 24. anchoring ditch of traditional impermeable layer, 25. traditional solid waste pile. DETAILED DESCRIPTION
[0020] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.
[0021] like Figure 3-7 As shown, an anti-seepage sewage discharge structure of a flat-land anti-seepage dry storage yard includes a retaining dam 1 built around the flat-land anti-seepage dry storage yard, a flood control sewage regulating pool 2 is set downstream of one section of the retaining dam 1, a permeable rockfill dam section 10 is set in the area where the retaining dam and the flood control sewage regulating pool are connected, and an anti-seepage layer 3 is laid in the storage yard storage area enclosed by the retaining dam, the inner side of the retaining dam and the inside of the flood control sewage regulating pool; the upper rockfill dam body 11 of the permeable rockfill dam section 10 is built on the top of the laid anti-seepage layer 3, and a transition layer 12 is set on the side of the permeable rockfill dam section 10 close to the storage yard and between the permeable rockfill dam section 10 and the anti-seepage layer 3, and a plurality of sewage overflow pipes 13 are buried in the permeable rockfill dam section 10 for connecting the storage yard storage area with the flood control sewage regulating pool 2. The anti-seepage layer 3 uses HDPE geomembrane as the anti-seepage material. To prevent infiltration at the interface, the storage area enclosed by the retaining dam 1 and the anti-seepage layer 3 inside the retaining dam and the flood control sewage regulating tank are laid as a whole. The sewage overflow pipe 13 is a HDPE pipe, which is buried in multiple layers at different depths in the permeable rockfill dam section 10 to ensure that the inlet elevation of the overflowing HDPE pipe is kept higher than the solid waste storage surface as the solid waste pile is discharged. The anti-seepage layer 3 is fixed by the anti-seepage layer anchoring trench 4 set on the retaining dam 1 and the periphery of the flood control sewage regulating tank 2.
[0022] Embodiment 1: A retaining dam 1 is built around a flat-land anti-seepage dry storage yard, and an anti-seepage layer 3 is laid on the storage yard area enclosed by the retaining dam, the inner side of the retaining dam, and the inside of the flood control sewage regulating pool; a partial area of the retaining dam 1 on one side of the flood control sewage regulating pool 2 is provided with a permeable rockfill 10; the permeable rockfill dam is composed of a rockfill dam body 11 and a transition layer 12 provided on the anti-seepage layer 3 of HDPE film at its upstream and bottom, and HDPE pipes 13 for sewage discharge are buried at different elevations on the permeable rockfill dam section 10. The sewage generated by rain and flood water in the reservoir is discharged through the HDPE pipe 13 for sewage discharge buried on the dam body, and at the same time, the inlet elevation of the HDPE pipe is kept higher than the outer slope 14 of the solid waste storage yard, so as to achieve the purpose of filtering and draining water through the transition layer 12 upstream of the rockfill dam when the precipitation is small, and discharging flood water through the HDPE pipe 13 when the rainfall is large, and discharging sewage that has not seeped out of the reservoir in time. When the flood volume is large, the dam top elevation of the permeable rockfill dam can also be lowered to form a spillway. When stacking, the solid waste pile 6 is stacked while rolling and trimming the solid waste slope, so that the clean water is discharged along the trimmed and covered slope 5 of the final stacking slope. This cycle is repeated until the final solid waste pile boundary line 7 is reached, reaching the final design elevation.
Claims
1. An anti-seepage and sewage discharge structure for a flat-land anti-seepage dry storage yard, characterized in that: It includes a retaining dam built around a flat-ground anti-seepage dry storage yard, a flood control sewage regulating tank is set up downstream of one section of the retaining dam, a permeable rockfill dam section is set up in the area where the retaining dam and the flood control sewage regulating tank are connected, and an anti-seepage layer is laid in the storage yard storage area enclosed by the retaining dam, the inner side of the retaining dam and the inside of the flood control sewage regulating tank; the upper dam body of the permeable rockfill dam section is built on the anti-seepage layer, and a transition layer is set up on the side of the permeable rockfill dam section close to the storage yard and between the permeable rockfill dam section and the anti-seepage layer, and a number of sewage overflow pipes are buried in the permeable rockfill dam section to connect the storage yard storage area with the flood control sewage regulating tank.
2. The anti-seepage and sewage discharge structure of a flat-land anti-seepage dry storage yard according to claim 1 is characterized in that: The anti-seepage layer adopts HDPE geomembrane as the anti-seepage material, and the anti-seepage layer in the storage yard area enclosed by the retaining dam, the inner side of the retaining dam and the inside of the flood control sewage regulating tank is laid as a whole.
3. The anti-seepage and sewage discharge structure of a flat-land anti-seepage dry storage yard according to claim 1 is characterized in that: The sewage overflow pipe is a HDPE pipe, and the sewage overflow pipe is buried in multiple layers at different depths in the permeable rockfill dam.
4. The anti-seepage and sewage discharge structure of a flat-land anti-seepage dry storage yard according to claim 1, characterized in that: The anti-seepage layer is fixed by anti-seepage layer anchoring trenches arranged on the retaining dam and the periphery of the flood control sewage regulating tank.