Flood drainage system and sealing method in rainwater and sewage diversion project of industrial solid waste landfill

Abstract

The present invention discloses a flood drainage system and a sealing method thereof in a rainwater and sewage diversion project of an industrial solid waste landfill. The flood drainage system comprises: a waste slag pile, a flood drainage shaft, an impermeable membrane, a drainage pipe and a pool. The flood drainage shaft is erected in the waste slag pile, the impermeable membrane is laid on the outer wall of the flood drainage shaft and the surface of the waste slag pile, the flood drainage shaft is connected to the pool through the drainage pipe, and a drainage hole is arranged on the wall of the flood drainage shaft. The sealing method disclosed in the present invention uses a high-density polyethylene film to seal the flood drainage shaft from the contact surface of the waste slag pile to the top inner wall, which not only solves the problem of increased leachate caused by rainwater entering the pile through the sealing gap after the water accumulation height exceeds the sealing height, but also solves the problem of increased leachate caused by rainwater entering the pile through the drainage hole and the gap between the high-density polyethylene film. The sealing method uses flexible materials for sealing, and compared with traditional sealing technology, the performance of resisting uneven settlement is better.

Description

Technical Field

[0001] The invention belongs to the technical field of industrial solid waste landfill, and relates to a flood discharge system in a rainwater and sewage diversion project of an industrial solid waste landfill and a sealing method thereof. Background Art

[0002] With the vigorous development of my country's industry, a large amount of industrial solid waste has appeared. In addition to a part of comprehensive utilization, there is still a lot of industrial solid waste that needs to be landfilled for disposal. Industrial solid waste landfills have the characteristics of large storage capacity and large storage area, which leads to a large catchment area in the landfill area. If it rains, a large amount of rainwater enters the pile body and produces leachate. The continuous accumulation of leachate will not only affect the safety of the pile body, but also increase the maintenance cost of the landfill.

[0003] In order to avoid the above problems, most industrial solid waste landfills take measures to separate rainwater and sewage. A common measure is to lay HDPE film (high-density polyethylene film) on the solid waste pile to isolate rainwater from the solid waste pile. The rainwater collected on the high-density polyethylene film converges into the drainage shaft set up in the waste pile, and finally is discharged out of the site through the drainage pipe under the pile. Since the drainage shaft is mostly a concrete structure, it is difficult to completely seal the high-density polyethylene film and the concrete pipe. In addition, there are multiple drainage holes on the drainage shaft. How to achieve the sealing of the drainage shaft and ensure the smooth drainage of rainwater has become a difficult problem faced in the rainwater and sewage diversion project of industrial solid waste landfills.

[0004] The existing technology has not yet solved the problem of how to seal the flood discharge shaft in the rainwater and sewage diversion project of the industrial solid waste landfill. Summary of the invention

[0005] In view of the shortcomings existing in the above problems, the present invention provides a flood discharge system and a sealing method thereof in a rainwater and sewage diversion project of an industrial solid waste landfill.

[0006] A flood drainage system in a rainwater and sewage diversion project of an industrial solid waste landfill, the flood drainage system comprising: a waste slag pile, a flood drainage shaft, an impermeable membrane, a drainage pipe and a pool; the flood drainage shaft is erected in the waste slag pile, a drainage hole is arranged on the shaft wall of the flood drainage shaft which is higher than the waste slag pile, the flood drainage shaft is connected to the pool through the drainage pipe, and the impermeable membrane is laid on the surface of the waste slag pile and the outer wall of the flood drainage shaft; the impermeable membrane on the outer wall of the flood drainage shaft is connected to the impermeable membrane on the surface of the waste slag pile; the upper edge of the impermeable membrane on the outer wall of the flood drainage shaft is fixed to the upper part of the inner wall of the flood drainage shaft; a drainage pipe is arranged in the drainage hole, the outer wall of the drainage pipe and the drainage hole are blocked by sealing material, and the drainage pipe is connected to the impermeable membrane on the outer wall of the flood drainage shaft.

[0007] As a further improvement of the present invention, the anti-seepage membrane laid on the waste slag pile has holes cut out at the location of the flood discharge shaft; the flood discharge shaft passes through the anti-seepage membrane on the waste slag pile through the holes, and the diameter of the holes is not greater than 100 mm.

[0008] As a further improvement of the present invention, the anti-seepage membrane laid on the outer wall of the flood drainage shaft has holes cut out at the positions of the drainage holes; the drainage pipe passes through the anti-seepage membrane on the outer wall of the flood drainage shaft through the holes, and the diameter of the holes is not greater than 50 mm; the lower part of the anti-seepage membrane on the outer wall of the flood drainage shaft is made into a pipe skirt, which wraps the intersection of the flood drainage shaft and the waste slag pile, and the diameter of the pipe skirt is not less than 300 mm; the pipe skirt is connected to the anti-seepage membrane on the waste slag pile by extrusion welding.

[0009] As a further improvement of the present invention, a drainage pipe is arranged in the drainage hole, the distance between the outer end of the drainage pipe and the outer wall of the flood discharge shaft is 150 mm, and all drainage pipes have the same size; the outer wall of the drainage pipe and the drainage hole are sealed with a sealing material, and the sealing material is asphalt.

[0010] As a further improvement of the present invention, the drainage pipe is connected to the anti-seepage membrane of the outer wall of the vertical flood discharge shaft by a pipe boot. The pipe boot is composed of a pipe sleeve and a pipe skirt, and the material of the pipe sleeve and the pipe skirt is a high-density polyethylene film.

[0011] As a further improvement of the present invention, the pipe skirt is close to the anti-seepage membrane on the outer wall of the drainage shaft, the pipe skirt wraps the intersection of the drainage pipe and the anti-seepage membrane on the outer wall of the drainage shaft, the diameter of the pipe skirt is not less than 300 mm, and the pipe skirt and the anti-seepage membrane on the outer wall of the drainage shaft are connected by extrusion welding; the pipe sleeve is close to the drainage pipe, one end of the pipe sleeve is connected to the pipe skirt, and the pipe sleeve and the drainage pipe are connected by extrusion welding.

[0012] As a further improvement of the present invention, the upper edge of the anti-seepage membrane on the outer wall of the drainage shaft is fixed to the upper part of the inner wall of the drainage shaft, and the fixing method is flat steel and expansion bolts.

[0013] As a further improvement of the present invention, the anti-seepage membrane is a high-density polyethylene membrane.

[0014] As a further improvement of the present invention, the drain pipe is a high-density polyethylene pipe.

[0015] As a further improvement of the present invention, the shape of the vertical flood drainage shaft includes: a hollow cylinder, a hollow cone and a hollow cuboid; preferably, the shape of the vertical flood drainage shaft is a hollow cylinder.

[0016] As a further improvement of the present invention, the shapes of the drainage holes include: square holes, irregular holes and round holes; preferably, the drainage holes are round holes, and all drainage holes on the flood discharge shaft have the same size. The number and positions of the drainage holes are opened on the flood discharge shaft according to actual needs.

[0017] As a further improvement of the present invention, the anti-seepage membrane is a high-density polyethylene membrane, and the thickness of the high-density polyethylene membrane is 1.0 mm to 1.5 mm.

[0018] As a further improvement of the present invention, the drain pipe is a high-density polyethylene pipe.

[0019] The present invention also discloses a sealing method for a flood discharge system in the above-mentioned rainwater and sewage diversion project of an industrial solid waste landfill, the method comprising:

[0020] Step 1: First determine the location, diameter, wall thickness and height of the vertical drainage shaft, and then determine the location and diameter of the drainage hole on the vertical drainage shaft;

[0021] Step 2: Lay a high-density polyethylene film flat on the waste slag pile, cut the high-density polyethylene film according to the size of the vertical shaft for flood discharge, and make the vertical shaft for flood discharge pass through the high-density polyethylene film laid on the surface of the pile;

[0022] Step 3: Install a high-density polyethylene pipe in the drain hole, and use asphalt to seal the gap between the drain hole and the outer wall of the high-density polyethylene pipe;

[0023] Step 4: High-density polyethylene film is laid on the outer wall of the vertical shaft from bottom to top. The high-density polyethylene film is first made into a pipe skirt at the lower part of the outer wall of the vertical shaft. The diameter of the pipe skirt is larger than the outer diameter of the vertical shaft. The pipe skirt is connected to the high-density polyethylene film on the waste slag pile by extrusion welding, and then gradually laid upwards; the high-density polyethylene film on the outer wall of the vertical shaft is cut according to the position and size of the drainage hole, and the high-density polyethylene pipe in the drainage hole passes through the high-density polyethylene film on the outer wall of the vertical shaft; the high-density polyethylene pipe and the high-density polyethylene film on the outer wall of the vertical shaft are connected by pipe boots;

[0024] Step 5. Lay the upper edge of the high-density polyethylene film on the outer wall of the drainage shaft to the upper part of the inner wall of the drainage shaft, squeeze the flat steel onto the high-density polyethylene film on the upper part of the inner wall of the drainage shaft, drill holes in the flat steel using drilling equipment and drill holes deep into the inner wall of the drainage shaft, and finally fix the flat steel, high-density polyethylene film and the inner wall of the drainage shaft together using expansion bolts.

[0025] As a further improvement of the present invention, in step one: the shape of the vertical drainage shaft is a hollow cylinder, the shape of the drainage holes is a circular hole, and all the drainage holes have the same size.

[0026] As a further improvement of the present invention, in step 2: the thickness of the high-density polyethylene film is 1.0mm to 1.5mm, and the high-density polyethylene film laid on the waste slag pile is cut with holes at the position of the drainage shaft; the diameter of the holes is larger than the outer diameter of the drainage shaft and is not greater than 100mm.

[0027] As a further improvement of the present invention, in step three: the distance between the outer end of the high-density polyethylene pipe and the outer wall of the flood discharge shaft is 150 mm, and all the high-density polyethylene pipes have the same size.

[0028] As a further improvement of the present invention, in the step four: the high-density polyethylene pipe and the high-density polyethylene film on the outer wall of the flood drainage shaft are connected by a pipe boot, the pipe boot is composed of a pipe sleeve and a pipe skirt, and the material of the pipe sleeve and the pipe skirt is a high-density polyethylene film; the pipe skirt is close to the high-density polyethylene film on the outer wall of the flood drainage shaft, the diameter of the pipe skirt is larger than the outer diameter of the high-density polyethylene pipe, and is not less than 300mm, and the pipe skirt and the high-density polyethylene film on the outer wall of the flood drainage shaft are connected by extrusion welding; the pipe sleeve is close to the high-density polyethylene pipe, one end of the pipe sleeve is connected to the pipe skirt, and the pipe sleeve and the high-density polyethylene pipe are connected by extrusion welding; the high-density polyethylene membrane laid on the outer wall of the flood drainage shaft has holes cut out at the position of the drainage hole, the diameter of the hole is larger than the diameter of the high-density polyethylene pipe in the drainage hole, and is not more than 50mm; the lower part of the high-density polyethylene membrane on the outer wall of the flood drainage shaft is made into a pipe skirt, and the diameter of the pipe skirt is larger than the outer diameter of the flood drainage shaft, and is not less than 300mm; the pipe skirt is connected to the high-density polyethylene membrane on the waste slag pile by extrusion welding.

[0029] Compared with the prior art, the present invention has the following beneficial effects:

[0030] 1. The present invention provides a flood discharge system and sealing method for a rainwater and sewage diversion project in an industrial solid waste landfill. The flood discharge shaft is sealed with a high-density polyethylene film from the contact surface of the waste slag pile to the top inner wall, which solves the problem of increased leachate caused by rainwater entering the waste slag pile through the sealing gap after the accumulated water height exceeds the sealing height.

[0031] 2. The present invention provides a flood discharge system and sealing method in a rainwater and sewage diversion project of an industrial solid waste landfill. A high-density polyethylene pipe is arranged in the drainage hole, and a pipe boot is used to achieve a sealed connection between the high-density polyethylene pipe and the high-density polyethylene membrane on the outer wall of the flood discharge shaft. This solves the problem of rainwater entering the waste pile through the drainage hole and the gap between the high-density polyethylene membrane and causing an increase in leachate.

[0032] 3. The present invention provides a flood discharge system and sealing method in a rainwater and sewage diversion project of an industrial solid waste landfill. The flood discharge shaft and drainage holes are sealed with flexible materials (high-density polyethylene film, high-density polyethylene pipe and asphalt). Compared with traditional sealing technology, the performance of resisting uneven settlement is better. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 A schematic diagram of sealing a vertical flood discharge shaft according to an embodiment of the present invention;

[0034] Figure 2 A partial large-scale drawing of the flood discharge shaft sealing according to an embodiment of the present invention;

[0035] Figure 3 This is a large-scale drawing of the drainage hole seal according to an embodiment of the present invention.

[0036] In the figure:

[0037] 1. Drainage shaft; 2. Drain hole; 3. Waste slag pile; 4. High-density polyethylene film on the waste slag pile; 5. High-density polyethylene pipe; 6. Asphalt; 7. High-density polyethylene film on the outer wall of the drainage shaft; 8. High-density polyethylene film pipe skirt on the outer wall; 10. Pipe boot; 11. High-density polyethylene pipe skirt; 12. High-density polyethylene pipe sleeve; 13. Inner wall of the drainage shaft; 14. Expansion bolt; 15. Drainage pipe; 16. Water tank; 17. Flat steel. DETAILED DESCRIPTION

[0038] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0039] The present invention is further described in detail below in conjunction with the accompanying drawings:

[0040] Example 1: Flood drainage system in rainwater and sewage diversion project of industrial solid waste landfill

[0041] like Figure 1As shown, the present invention provides a flood drainage system in the rainwater and sewage diversion project of an industrial solid waste landfill. The flood drainage system includes: a waste slag pile 3, a flood drainage shaft 1, a high-density polyethylene membrane, a drainage pipe 15 and a pool 16; the flood drainage shaft 1 is erected in the waste slag pile 3, the anti-seepage membrane is laid on the outer wall of the flood drainage shaft 1 and the surface of the waste slag pile 3, the flood drainage shaft 1 is connected to the pool 16 through the drainage pipe 15, and a drainage hole 2 is arranged on the wall of the flood drainage shaft 1. The flood drainage shaft 1 is in the shape of a hollow cylinder, and its diameter, height and wall thickness are set according to actual needs. The drainage hole 2 is in the shape of a circular hole, which is convenient for installing a high-density polyethylene pipe 5 in the drainage hole 2. All the drainage holes 2 on the flood drainage shaft 1 have the same size, and the number, diameter and position of the drainage holes 2 are opened on the flood drainage shaft 1 according to actual needs. The thickness of the high-density polyethylene membrane is 1.0mm~1.5mm, which can not only achieve the sealing effect, but also save materials. The distance between the outer end of the high-density polyethylene tube 5 arranged in the drainage hole 2 and the outer wall of the vertical shaft 1 for flood discharge is 150mm, and all high-density polyethylene tubes 5 have the same size; the outer wall of the high-density polyethylene tube 5 and the drainage hole 2 are sealed with asphalt 6. The high-density polyethylene film laid on the waste slag pile 3 is cut out with holes at the location of the vertical shaft 1 for flood discharge, and the diameter of the holes is larger than the outer diameter of the vertical shaft 1 for flood discharge, and is not larger than 100mm. The high-density polyethylene film 7 laid on the outer wall of the vertical shaft 1 for flood discharge is cut out with holes at the location of the drainage hole 2, and the diameter of the holes is larger than the diameter of the high-density polyethylene tube 5 in the drainage hole 2, and is not larger than 50mm. The lower part of the high-density polyethylene film 7 on the outer wall of the vertical shaft 1 for flood discharge is a tube skirt 8, and the diameter of the tube skirt 8 is larger than the outer diameter of the vertical shaft 1 for flood discharge, and is not less than 300mm; the tube skirt 8 is connected to the high-density polyethylene film 4 on the waste slag pile 3 by extrusion welding. Extrusion welding is single-track welding. When welding, the machine head must be aligned with the joint, and the welding must not be off-center. Slip welding and skip welding are not allowed. The thickness of the weld center should generally be 2.5 times the thickness of the high-density polyethylene film.

[0042] like Figure 3 As shown, the high-density polyethylene pipe 5 is connected to the high-density polyethylene film 7 on the outer wall of the vertical shaft 1 for flood discharge by means of a pipe boot 10. The pipe boot 10 is composed of a pipe sleeve 12 and a pipe skirt 11, and the material of the pipe sleeve 12 and the pipe skirt 11 is a high-density polyethylene film. The pipe skirt 11 is in close contact with the high-density polyethylene film 7 on the outer wall of the vertical shaft 1 for flood discharge, and the diameter of the pipe skirt 11 is larger than the outer diameter of the high-density polyethylene pipe 5 and is not less than 300 mm. The pipe skirt 11 is connected to the high-density polyethylene film 7 on the outer wall of the vertical shaft 1 for flood discharge by means of extrusion welding. The pipe sleeve 12 is in close contact with the high-density polyethylene pipe 5, and one end of the pipe sleeve 12 is connected to the pipe skirt 11, and the pipe sleeve 12 is connected to the high-density polyethylene pipe 5 by means of extrusion welding. The pipe boot 10 realizes the sealed connection between the high-density polyethylene pipe 5 and the high-density polyethylene film 7 on the outer wall of the vertical shaft 1 for flood discharge, and solves the problem of increased leachate caused by rainwater entering the pile through the drainage hole 2 and the gap between the high-density polyethylene film.

[0043] like Figure 2 As shown, the upper edge of the high-density polyethylene film 7 on the outer wall of the flood discharge shaft 1 is fixed to the upper part of the inner wall 13 of the flood discharge shaft 1, and is fixed by flat steel 17 and expansion bolts 14. The fixing method is to squeeze the flat steel 17 on the high-density polyethylene film on the upper part of the inner wall of the flood discharge shaft 1, drill holes in the flat steel 17 through drilling equipment and drill holes deep to the inner wall 13 of the flood discharge shaft 1, and finally fix the flat steel 17, the high-density polyethylene film 7 and the inner wall 13 of the flood discharge shaft 1 together through expansion bolts 14. The flood discharge shaft 1 is sealed with high-density polyethylene film from the contact surface of the waste slag pile 3 to the top inner wall, which solves the problem of increased leachate caused by rainwater entering the waste slag pile 3 through the sealing gap after the water accumulation height exceeds the sealing height.

[0044] This flood discharge system in the rainwater and sewage diversion project of the industrial solid waste landfill not only has the advantages of being simple and easy to implement, having good sealing effect and low cost, but also uses high-density polyethylene film, high-density polyethylene pipe 5 and asphalt 6 for sealing. Compared with traditional sealing technology, it has better performance in resisting uneven settlement.

[0045] Embodiment 2: Sealing method for flood discharge system in rainwater and sewage diversion project of industrial solid waste landfill

[0046] Step 1: first determine the position, diameter, wall thickness and height of the drainage shaft 1, and then determine the position and diameter of the drainage hole 2 on the drainage shaft 1; the drainage shaft 1 is in the shape of a hollow cylinder, the drainage hole 2 is in the shape of a circular hole, and all drainage holes 2 have the same size.

[0047] Step 2: lay the high-density polyethylene film 4 flat on the waste slag pile 3, cut the high-density polyethylene film 4 according to the size of the drainage shaft 1, and make the drainage shaft 1 pass through the high-density polyethylene film 4 laid on the surface of the pile; the thickness of the high-density polyethylene film is 1.0mm~1.5mm, and the high-density polyethylene film 4 laid on the waste slag pile 3 is cut with holes at the position of the drainage shaft 1, and the diameter of the holes is larger than the outer diameter of the drainage shaft 1 and not more than 100mm.

[0048] Step three, set a high-density polyethylene tube 5 in the drainage hole 2, and use asphalt 6 to seal the gap between the drainage hole 2 and the outer wall of the high-density polyethylene tube 5; the distance between the outer end of the high-density polyethylene tube 5 and the outer wall of the flood discharge shaft 1 is 150 mm, and all high-density polyethylene tubes 5 have the same size.

[0049] Step 4: The outer wall of the vertical shaft 1 for flood discharge is paved with a high-density polyethylene film 7 from bottom to top. The high-density polyethylene film 7 is first made into a pipe skirt 8 at the lower part of the outer wall of the vertical shaft 1 for flood discharge. The diameter of the pipe skirt 8 is larger than the outer diameter of the vertical shaft 1 for flood discharge, and the pipe skirt 8 is connected to the high-density polyethylene film 4 on the waste slag pile 3 by extrusion welding, and then gradually paved upwards. The high-density polyethylene film 7 on the outer wall of the vertical shaft for flood discharge is cut according to the position and size of the drainage hole 2, and the high-density polyethylene pipe 5 in the drainage hole 2 passes through the high-density polyethylene film 7 on the outer wall of the vertical shaft for flood discharge. The high-density polyethylene pipe 5 is connected to the high-density polyethylene film 7 on the outer wall of the vertical shaft for flood discharge by a pipe boot 10. The pipe boot 10 is composed of a pipe sleeve 12 and a pipe skirt 11. The pipe sleeve 12 and the pipe skirt 11 are connected. The material is high-density polyethylene film; the pipe skirt 11 is close to the high-density polyethylene film 7 on the outer wall of the flood discharge shaft 1, the diameter of the pipe skirt 11 is larger than the outer diameter of the high-density polyethylene pipe 5, and is not less than 300mm, and the pipe skirt 11 and the high-density polyethylene film 7 on the outer wall of the flood discharge shaft 1 are connected by extrusion welding; the pipe sleeve 12 is close to the high-density polyethylene pipe 5, one end of the pipe sleeve 12 is connected to the pipe skirt 11, and the pipe sleeve 12 and the high-density polyethylene pipe 5 are connected by extrusion welding; the high-density polyethylene film 7 laid on the outer wall of the flood discharge shaft 1 has holes cut out at the position of the drainage hole 2, the diameter of the holes is larger than the diameter of the high-density polyethylene pipe 5 in the drainage hole 2, and is not more than 50mm; the diameter of the pipe skirt 8 is not less than 300mm.

[0050] Step 5. Lay the upper edge of the high-density polyethylene film 7 on the outer wall of the flood drainage shaft 1 to the upper part of the inner wall 13 of the flood drainage shaft 1, squeeze the flat steel 17 on the high-density polyethylene film on the upper part of the inner wall of the flood drainage shaft 1, and drill holes in the flat steel 17 through drilling equipment and as deep as the inner wall 13 of the flood drainage shaft 1. Finally, fix the flat steel 17, the high-density polyethylene film 7 and the inner wall 13 of the flood drainage shaft 1 together through expansion bolts 14.

[0051] In actual operation, the high-density polyethylene film to be laid is cut according to the needs. During laying, adjacent high-density polyethylene films are connected by extrusion welding.

[0052] Example 3: Flood drainage system in the rainwater and sewage diversion project of industrial solid waste landfill

[0053] According to the first and second embodiments, a flood discharge system is obtained. When the industrial solid waste landfill encounters rainfall, a part of the rainwater directly flows into the drainage pipe 15 through the top of the flood discharge shaft 1, and finally flows into the pool 16. Another part of the rainwater will temporarily gather on the surface of the waste residue pile 3 to form accumulated water. When the height of the accumulated water reaches the position of the drainage hole 2, the accumulated water can enter the flood discharge shaft 1 through the high-density polyethylene pipe 5 of the drainage hole 2, and then flow into the drainage pipe 15, and finally flow into the pool 16.

[0054] in conclusion:

[0055] In the flood drainage system in the rainwater and sewage diversion project of the industrial solid waste landfill provided in the specific implementation method, the flood drainage shaft is sealed with a high-density polyethylene film from the contact surface of the waste slag pile to the top inner wall, which solves the problem of increased leachate caused by rainwater entering the pile through the sealing gap after the water accumulation height exceeds the sealing height. By arranging a high-density polyethylene pipe in the drainage hole, and then realizing a sealed connection between the high-density polyethylene pipe and the high-density polyethylene film on the outer wall of the flood drainage shaft through a pipe boot, the problem of increased leachate caused by rainwater entering the pile through the drainage hole and the gap between the high-density polyethylene membrane is solved. The flood drainage shaft and the drainage hole are sealed with a high-density polyethylene film, a high-density polyethylene pipe and asphalt, which are more excellent in resisting uneven settlement than traditional sealing technology. The drainage system has the advantages of being simple and easy to implement, having a good sealing effect and low cost.

[0056] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A flood drainage system in a rainwater and sewage diversion project of an industrial solid waste landfill, wherein a flood drainage shaft is erected in a waste slag pile, a drainage hole is arranged on the wall of the flood drainage shaft higher than the waste slag pile, and the flood drainage shaft is connected to a water pool through a drainage pipe, characterized in that: The flood drainage system comprises: a waste slag pile, a flood drainage shaft, an impermeable membrane, a drainage pipe and a pool; the impermeable membrane is laid on the surface of the waste slag pile and the outer wall of the flood drainage shaft; the impermeable membrane on the outer wall of the flood drainage shaft is connected to the impermeable membrane on the surface of the waste slag pile; the upper edge of the impermeable membrane on the outer wall of the flood drainage shaft is fixed to the upper part of the inner wall of the flood drainage shaft; a drainage pipe is arranged in the drainage hole, the outer wall of the drainage pipe and the drainage hole are blocked with sealing material, and the drainage pipe is connected to the impermeable membrane on the outer wall of the flood drainage shaft; the impermeable membrane is a high-density polyethylene membrane; the drainage pipe is a high-density polyethylene pipe; the sealing material is asphalt; The anti-seepage membrane laid on the outer wall of the vertical shaft for flood discharge has holes cut out at the position of the drainage hole; the lower part of the anti-seepage membrane on the outer wall of the vertical shaft for flood discharge is a tube skirt, and the tube skirt is connected to the anti-seepage membrane on the waste slag pile by extrusion welding; The high-density polyethylene pipe is connected to the high-density polyethylene film on the outer wall of the flood drainage shaft by a pipe boot. The pipe boot consists of a pipe sleeve and a pipe skirt. The pipe skirt is close to the high-density polyethylene film on the outer wall of the flood drainage shaft. The pipe skirt and the high-density polyethylene film on the outer wall of the flood drainage shaft are connected by extrusion welding. The pipe sleeve is close to the high-density polyethylene pipe, one end of the pipe sleeve is connected to the pipe skirt, and the pipe sleeve and the high-density polyethylene pipe are connected by extrusion welding.

2. The flood drainage system according to claim 1, characterized in that: The anti-seepage membrane laid on the waste slag pile is cut with holes at the location of the flood discharge shaft.

3. The sealing method of a flood discharge system according to any one of claims 1 to 2, characterized in that: The sealing method comprises: Step 1: First determine the location, diameter, wall thickness and height of the vertical drainage shaft, and then determine the location and diameter of the drainage hole on the vertical drainage shaft; Step 2: Lay a high-density polyethylene film flat on the waste slag pile, cut the high-density polyethylene film according to the size of the vertical shaft for flood discharge, and make the vertical shaft for flood discharge pass through the high-density polyethylene film laid on the surface of the pile; Step 3: Install a high-density polyethylene pipe in the drain hole, and use asphalt to seal the gap between the drain hole and the outer wall of the high-density polyethylene pipe; Step 4: High-density polyethylene film is laid on the outer wall of the vertical shaft from bottom to top. The high-density polyethylene film is first made into a pipe skirt at the lower part of the outer wall of the vertical shaft. The diameter of the pipe skirt is larger than the outer diameter of the vertical shaft. The pipe skirt is connected to the high-density polyethylene film on the waste slag pile by extrusion welding, and then gradually laid upwards; the high-density polyethylene film on the outer wall of the vertical shaft is cut according to the position and size of the drainage hole, and the high-density polyethylene pipe in the drainage hole passes through the high-density polyethylene film on the outer wall of the vertical shaft; the high-density polyethylene pipe and the high-density polyethylene film on the outer wall of the vertical shaft are connected by pipe boots; Step 5. Lay the upper edge of the high-density polyethylene film on the outer wall of the drainage shaft to the upper part of the inner wall of the drainage shaft, squeeze the flat steel onto the high-density polyethylene film on the upper part of the inner wall of the drainage shaft, drill holes in the flat steel using drilling equipment and drill holes deep into the inner wall of the drainage shaft, and finally fix the flat steel, high-density polyethylene film and the inner wall of the drainage shaft together using expansion bolts.

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