Emergency storage device for leachate in solid waste landfill

Abstract

The utility model discloses an emergency storage device for leachate in a solid waste landfill. The emergency storage device comprises an HDPE (high-density polyethylene) film, a geogrid, a foam plate and a ballasting piece, the geogrid and the foam board are integrally laid on the outer surface of the retaining dam / side slope with the U-shaped longitudinal section in sequence from outside to inside; the whole HDPE membrane is laid on the outer surface of the geogrid in a wrapping manner; a ballasting piece is arranged at the position, close to the geogrid, in the bottom of the HDPE film; a round hole is formed in the top of the HDPE film, an XPE plate is designed around the round hole, and the whole XPE plate is wrapped and sealed by the HDPE film. The utility model discloses a leachate emergency storage device for a solid waste landfill. The technical problem to be solved is how to avoid collapse of a pipe orifice used for feeding and discharging leachate and improve the leachate emergency storage function of the storage device.

Description

Technical Field

[0001] The utility model relates to a solid waste emergency storage device, which utilizes a HDPE film, a geogrid, a foam plate and a ballast to perform emergency storage on leachate. Background Art

[0002] During the operation of solid waste landfills, emergency storage of leachate is required. The current method is generally to wrap the leachate with HDPE membrane, in which the HDPE membrane is designed with circular holes for the leachate to enter or the gas to escape. Currently, the circular holes have no support and are easily collapsed, so that the circular holes are sealed by the leachate, affecting the introduction of the leachate or the escape of the gas. At the same time, since it is simply wrapped with an HDPE mold, its actual effect needs to be improved. Utility Model Content

[0003] The utility model aims to provide an emergency storage device for leachate from a solid waste landfill, and solves the technical problem of how to avoid the collapse of a pipe opening for the leachate inlet and outlet and improve the emergency storage function of the storage device for leachate at the same time.

[0004] An emergency storage device for leachate from a solid waste landfill comprises a HDPE membrane, a geogrid, a foam board and a ballast; the geogrid and the foam board are laid as a whole from the outside to the inside on the outer surface of a retaining dam / slope having a U-shaped longitudinal section; the HDPE membrane is laid as a whole in a wrapped shape on the outer surface of the geogrid; a ballast is arranged at the bottom of the HDPE membrane near the geogrid; a pipe opening for the inlet and outlet of leachate is provided at the top of the HDPE membrane, and an XPE board is designed around the pipe opening, and the XPE board is wrapped and sealed as a whole by the HDPE membrane.

[0005] The ballast members are arranged 8-10 in the transverse direction of each longitudinal section.

[0006] Four XPE plates are designed around the pipe opening.

[0007] Each XPE board is a block structure as a whole.

[0008] The thickness of the HDPE film is not less than 1.5 mm.

[0009] The geogrid is a geogrid of 8 mm specification.

[0010] The thickness of the foam board is not less than 50 mm.

[0011] The ballast is a wrapped concrete block / bagged gravel.

[0012] The beneficial effects of the utility model are as follows: by designing an XPE plate around the circular hole, when the leaking liquid approaches the position of the XPE plate, the XPE plate uses buoyancy to lift up the surrounding HDPE membrane, thereby preventing the circular hole from collapsing and being sealed by the leachate; at the same time, by sequentially arranging foam plates, geogrids, HDPE membranes, and ballast pieces outside the retaining dam / slope, emergency storage of leachate from a solid waste landfill of not less than 200 cubic meters can be well handled. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the application of the emergency storage device for leachate from a solid waste landfill;

[0014] Figure 2 It is a schematic diagram of the XPE board being arranged around the circular hole;

[0015] Figure 3 It is a schematic diagram of the XPE board being fully wrapped by the HDPE film;

[0016] 1. HDPE membrane, 2. geogrid, 3. foam board, 4. ballast, 5. pipe mouth, 6. retaining dam, 7. XPE board. DETAILED DESCRIPTION

[0017] Please refer to Figures 1 to 3 The solid waste landfill leachate emergency storage device in the figure is designed with HDPE membrane 1, geogrid 2, foam board 3, and ballast 4; the HDPE membrane 1 is used to wrap the leachate in a package shape, the geogrid 2 and foam board 3 are used to form a skeleton structure to support the HDPE membrane 1, and the ballast 4 is used to press the bottom of the HDPE membrane 1.

[0018] The overall thickness of the HDPE film 1 in the figure needs to be maintained at no less than 1.5 mm so that it has sufficient strength. The HDPE film 1 is laid on the outer surface of the geogrid 2 in a wrapped shape as a whole. The top two sides of the HDPE film 1 are respectively designed with pipe openings 5 ​​for the entry and exit of leachate. Four evenly arranged XPE boards 7 are designed around the pipe openings 5. Each XPE board 7 is a block structure as a whole and is completely wrapped by the HDPE film 1.

[0019] The geogrid 2 in the figure is an existing building material, which is laid integrally with the plastic foam board 3 from the outside to the inside on the outer surface of the dam 6 or the slope with a U-shaped longitudinal section. In this case, the geogrid 2 uses an 8mm geogrid 2, and the thickness of the foam board 3 is not less than 50mm; through the joint action of the geogrid 2 and the plastic foam board 3, a good supporting effect is played.

[0020] The ballast pieces 4 in the figure are wrapped concrete blocks / bagged gravel, which are arranged inside the bottom of the HDPE film 1 and close to the geogrid 2. As shown in the figure, 9 ballast pieces 4 are arranged horizontally in each longitudinal section.

[0021] By designing the XPE plate 7 around the pipe mouth 5, when the leaking liquid reaches the position corresponding to the XPE plate 7, the XPE plate 7 can lift the pipe mouth 5 by utilizing the buoyancy, thereby avoiding being sealed by the leachate.

[0022] The specific embodiments described above are only used to explain the present technical solution and are not used to limit the present technical solution. In the description of the present technical solution, it should be noted that the terms such as "upper" and "inner" indicate the orientation or position relationship based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present technical solution and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present technical solution.

[0023] At the same time, in the description of this technical solution, it should be noted that, unless otherwise clearly specified and limited, the terms "fixed" and "matched" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected, or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this technical solution can be understood according to specific circumstances.

[0024] Although embodiments of the present technical solution have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present technical solution, and that the scope of the present technical solution is defined by the appended claims and their equivalents.

Claims

1. Emergency storage device for leachate from solid waste landfill, characterized by: The invention comprises a HDPE film (1), a geogrid (2), a foam board (3), and a ballast (4); the geogrid (2) and the foam board (3) are laid integrally from the outside to the inside on the outer surface of a retaining dam (6) / slope having a U-shaped longitudinal section; the HDPE film (1) is laid integrally on the outer surface of the geogrid (2) in a wrapped manner; a ballast (4) is arranged at the bottom of the HDPE film (1) near the geogrid (2); a pipe opening (5) for the inlet and outlet of leachate is provided at the top of the HDPE film (1), and an XPE board (7) is designed around the pipe opening (5), and the XPE board (7) is integrally wrapped and sealed by the HDPE film (1).

2. The solid waste landfill leachate emergency storage device according to claim 1, characterized in that: The ballast members (4) are arranged in 8 to 10 pieces in the transverse direction of each longitudinal section.

3. The solid waste landfill leachate emergency storage device according to claim 2, characterized in that: Four XPE plates (7) are designed around the pipe opening (5).

4. The solid waste landfill leachate emergency storage device according to claim 3, characterized in that: Each XPE board (7) is a block structure as a whole.

5. The solid waste landfill leachate emergency storage device according to claim 4, characterized in that: The thickness of the HDPE film (1) is not less than 1.5 mm.

6. The solid waste landfill leachate emergency storage device according to claim 5, characterized in that: The geogrid (2) is a geogrid (2) with a specification of 8 mm.

7. The solid waste landfill leachate emergency storage device according to claim 6, characterized in that: The foam board (3) has a thickness of not less than 50 mm.

8. The solid waste landfill leachate emergency storage device according to claim 7, characterized in that: The ballast (4) is a wrapped concrete block / bagged gravel.

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