Slope flood intercepting ditch for early closure of gentle slope valley type landfill

Abstract

The utility model discloses a slope flood intercepting ditch for early closure of a gentle slope valley type landfill. The slope flood intercepting ditch comprises a flood intercepting ditch body, bolts and a ballast layer. The flood intercepting ditch is formed in a preset position of the reservoir area slope; the sealing anti-seepage film and the landfill reservoir area bottom film are anchored on the inner side of the flood intercepting ditch through bolts; and the ballast layer is arranged in the flood intercepting ditch and is used for carrying out ballast fixation on the field sealing impermeable film and the landfill reservoir area bottom film which are anchored in the flood intercepting ditch. The flood intercepting ditch is constructed at the preset position of the reservoir area slope of the valley-type landfill, so that good collection and smooth guide and drainage of rainwater gathered in the landfill and the local slope can be ensured; the closure covering film and the landfill area bottom film are anchored in the flood intercepting ditch through the bolts and ballasted, so that the integrity of connection of the closure covering film and the landfill area bottom film is guaranteed, and good rain and sewage diversion and pollution prevention and control effects are achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of landfills, in particular to a slope flood interception ditch used for early closure of a valley-type landfill with a gentle slope. Background Art

[0002] Landfills are mainly divided into valley type, flat land type and slope type. Valley type landfills are more common in hilly and mountainous areas. During construction, flood diversion ditches are built around the landfill according to the design elevation. During the operation of the landfill, there are situations such as non-standard landfill of sludge, which cause problems such as blockage of the leachate drainage system and landfill gas accumulation, and even the risk of garbage dam breach. If the above problems occur, the landfill must be comprehensively managed or even closed in advance. Because it has not been filled to the design elevation, there is a large height difference between the original flood diversion ditch and the closure elevation. The surface water collected by the garbage pile and the slope cannot be discharged out of the site through the original flood diversion ditch. Long-term accumulation can easily cause surface water to flow back into the landfill, and the slope soil becomes unstable and landslides. Therefore, it is necessary to rebuild the drainage system to discharge the surface water out of the site in time.

[0003] The reconstruction of flood diversion ditches in valley-type landfills generally faces two problems. For valley-type landfills with steeper slopes (some slopes are nearly vertical), it is impossible to excavate new anchoring ditches on the existing slopes, and it is necessary to consider replacing and building flood diversion ditches in the reservoir area. Among them, the patent "A flood diversion ditch in the reservoir area for early closure of landfills" with application number CN202321570968.9 has made a detailed description of the construction method of flood diversion ditches in the reservoir area for early closure of landfills with steeper slopes. For valley-type landfills with gentler slopes, it is necessary to consider re-excavating flood ditches on the slopes, and it is necessary to ensure the anchoring of the anti-seepage material and the sealing welding of the original anti-seepage membrane of the slope with the closure material; therefore, how to solve the problem of rebuilding flood diversion ditches on gentler slopes of valley-type landfills is the key to the success of the design of drainage systems after the closure of such landfills. Utility Model Content

[0004] In view of the deficiencies existing in the prior art, the utility model provides a slope flood interception ditch for early closure of a valley-type landfill with a gentle slope.

[0005] The utility model discloses a slope interception ditch for early closure of a valley-type landfill with a gentle slope. The valley-type landfill is a landfill constructed by building a dam downstream of the valley using the storage space formed by the valley, including a storage area and a garbage pile buried in the storage area; the slope interception ditch includes: a interception ditch, bolts and a ballast layer;

[0006] The flood interception ditch is formed at a preset position of the slope of the reservoir area;

[0007] The bolts anchor the sealing anti-seepage membrane and the bottom membrane of the landfill area to the inner side of the flood interception ditch;

[0008] The ballast layer is placed in the flood diversion ditch and is used to ballast and fix the sealing anti-seepage membrane and the bottom membrane of the landfill area anchored in the flood diversion ditch.

[0009] As a further improvement of the utility model, the slope of the reservoir area is a rock foundation slope with a slope ratio gentler than 1:1.

[0010] As a further improvement of the utility model, the structure of the flood diversion ditch includes one of a reinforced concrete structure, a brick structure and a mortar-laid block stone structure, and the surface water collected in the slope and the landfill after the early closure is drained through the flood diversion ditch.

[0011] As a further improvement of the utility model, the bolt is an expansion bolt.

[0012] As a further improvement of the present invention, the expansion bolt includes one of M8, M10, and M12 expansion bolts.

[0013] As a further improvement of the utility model, a HDPE film is welded on the outside of the bolt.

[0014] As a further improvement of the utility model, the bolts anchor the sealing anti-seepage membrane and the bottom membrane of the landfill area to the inner wall of the flood diversion ditch close to the side of the garbage dump.

[0015] As a further improvement of the present invention, the material of the ballast layer is plain concrete.

[0016] As a further improvement of the present invention, the plain concrete adopts C20 or C25 plain concrete with a thickness of 30 to 50 cm.

[0017] Compared with the prior art, the beneficial effects of the utility model are:

[0018] The flood diversion ditch of the utility model is constructed at a preset position of the slope of the reservoir area of ​​the valley-type landfill, which can ensure the good collection and smooth drainage of rainwater gathered in the landfill and local slopes; the utility model anchors the closure covering film and the landfill reservoir bottom membrane in the flood diversion ditch by bolts, and performs ballasting, thereby ensuring the integrity of the connection between the closure covering film and the landfill reservoir bottom membrane, and achieving good rainwater and sewage diversion and pollution control effects. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 The present invention is a schematic structural diagram of a slope flood interception ditch for early closure of a valley-type landfill with a gentle slope disclosed in an embodiment of the utility model.

[0020] In the figure:

[0021] 1. Sealing and anti-seepage membrane; 2. Flood diversion ditch; 3. Expansion bolts; 4. Welding points; 5. Plain concrete; 6. Bottom membrane of landfill area. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention 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 limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0024] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" 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 a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0025] The utility model is further described in detail below in conjunction with the accompanying drawings:

[0026] like Figure 1 As shown, a valley-type landfill is a landfill constructed by building a dam downstream of the valley using the storage space formed by the valley, including a reservoir area, a garbage pile buried in the reservoir area, and a landfill covering soil. A landfill anti-seepage membrane 1 covering the garbage pile is provided between the landfill covering soil and the garbage pile, and a landfill reservoir bottom membrane 6 is laid on the bottom of the reservoir area and the slope. When the valley-type landfill needs to be closed in advance, the garbage pile fails to meet the requirements of the original flood diversion ditch, so that the surface water collected by the garbage pile and the slope cannot be discharged out of the site through the original flood diversion ditch. Long-term accumulation is likely to cause surface water to flow back into the landfill, and the slope soil body becomes unstable and slides. For this reason, the utility model provides a slope flood diversion ditch for early closure of a valley-type landfill with a relatively gentle slope, which includes: a newly constructed flood diversion ditch 2, bolts and a ballast layer; wherein,

[0027] The flood intercepting ditch 2 of the utility model is formed at a preset position of the slope of the reservoir area. The slope of the reservoir area is a rock foundation slope with a slope ratio gentler than 1:1. The preset position is a position where the surface water collected on the slope and in the landfill after the valley-type landfill is closed in advance can be smoothly drained; the flood intercepting ditch 2 is generally a semi-excavated structure, that is, after cleaning up part of the garbage on the slope of the reservoir area, semi-excavation is performed on the original rock slope to form a foundation, and the flood intercepting ditch 2 is constructed on the basis of the semi-excavation. The flood intercepting ditch 2 includes one of a reinforced concrete structure, a brick structure and a mortar-laid block stone structure, and the surface water collected on the slope and in the landfill after the early closure is smoothly drained through the flood intercepting ditch 2.

[0028] The bolts of the utility model anchor the anti-seepage membrane 1 and the bottom membrane 6 of the landfill area to the inner side of the flood diversion ditch 2. The bolts are preferably expansion bolts 3, including one of M8, M10, and M12 expansion bolts. The expansion bolts 3 preferably anchor the anti-seepage membrane 1 and the bottom membrane 6 of the landfill area to the inner side wall of the flood diversion ditch near the garbage dump. In order to prevent the expansion bolts 3 from rusting, it is necessary to use geomembrane to reverse the expansion bolts and weld them to form a Figure 1 The welding point 4 shown is that the HDPE film covers the expansion bolt 3, and the HDPE film is welded to the geotechnical material fixed by the expansion bolt 3 to cover the expansion bolt 3.

[0029] After being anchored by expansion bolts 3, the field sealing anti-seepage membrane 1 and the landfill reservoir bottom membrane 6 of the utility model continue to extend through the bottom of the flood interception ditch 2 to the other side wall of the flood interception ditch 2, and the field sealing anti-seepage membrane 1 and the landfill reservoir bottom membrane 6 anchored in the flood interception ditch 2 are ballasted and fixed by the ballast layer in the flood interception ditch 2. The ballast layer uses plain concrete 5, and the plain concrete uses C20 or C25 plain concrete with a thickness of 30 to 50 cm.

[0030] The construction method of the utility model comprises:

[0031] S1, first complete the excavation of the flood diversion ditch foundation, and then proceed with the construction of the flood diversion ditch 2;

[0032] S2, anchoring the sealing anti-seepage membrane 1 and the landfill bottom membrane 6 to the inner wall of the flood intercepting ditch 2 by using expansion bolts 3;

[0033] S3. The sealing anti-seepage membrane 1 and the bottom membrane 6 of the landfill area can continue to extend to the bottom of the flood interception ditch and fold over to a certain size, and then be backfilled and compacted with plain concrete 5.

[0034] The advantages of the utility model are:

[0035] The flood diversion ditch of the utility model is constructed at a preset position of the slope of the reservoir area of ​​the valley-type landfill, which can ensure the good collection and smooth drainage of rainwater gathered in the landfill and local slopes; the utility model anchors the closure covering film and the landfill reservoir bottom membrane in the flood diversion ditch by bolts, and performs ballasting, thereby ensuring the integrity of the connection between the closure covering film and the landfill reservoir bottom membrane, and achieving good rainwater and sewage diversion and pollution control effects.

[0036] 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 be subject to 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 slope flood interception ditch for early closure of a valley-type landfill with a gentle slope, wherein the valley-type landfill is a landfill constructed by building a dam downstream of the valley using the storage space formed by the valley, and includes a storage area and a garbage pile buried in the storage area; characterized in that: The slope flood interception ditch comprises: a flood interception ditch, bolts and a ballast layer; The flood interception ditch is formed at a preset position of the slope of the reservoir area; The bolts anchor the sealing anti-seepage membrane and the bottom membrane of the landfill area to the inner side of the flood interception ditch; The ballast layer is placed in the flood diversion ditch and is used to ballast and fix the sealing anti-seepage membrane and the bottom membrane of the landfill area anchored in the flood diversion ditch.

2. The slope flood interception ditch according to claim 1, characterized in that: The slope of the reservoir area is a rock foundation slope with a slope ratio of less than 1:

1.

3. The slope flood interception ditch according to claim 1, characterized in that: The structure of the flood intercepting ditch includes one of a reinforced concrete structure, a brick structure and a mortar-laid block stone structure, and the surface water collected in the slope and the landfill after the early closure is drained through the flood intercepting ditch.

4. The slope flood interception ditch according to claim 1, characterized in that: The bolts are expansion bolts.

5. The slope flood interception ditch according to claim 4, characterized in that: The expansion bolts include one of M8, M10 and M12 expansion bolts.

6. The slope flood interception ditch according to claim 1, characterized in that: The outer package of the bolt is welded with a HDPE film.

7. The slope flood interception ditch according to claim 1, characterized in that: The bolts anchor the sealing anti-seepage membrane and the bottom membrane of the landfill area to the inner wall of the flood interception ditch close to the side of the garbage dump.

8. The slope flood interception ditch according to claim 1, characterized in that: The material of the ballast layer is plain concrete.

9. The slope flood interception ditch according to claim 8, characterized in that: The plain concrete adopts C20 or C25 plain concrete with a thickness of 30 to 50 cm.

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