CN206500424U - On refuse landfill cover layer at high tolerance landfill gas big leak repairing structure - Google Patents
On refuse landfill cover layer at high tolerance landfill gas big leak repairing structure Download PDFInfo
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- CN206500424U CN206500424U CN201720077819.7U CN201720077819U CN206500424U CN 206500424 U CN206500424 U CN 206500424U CN 201720077819 U CN201720077819 U CN 201720077819U CN 206500424 U CN206500424 U CN 206500424U
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- leak
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/30—Landfill technologies aiming to mitigate methane emissions
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Abstract
The utility model discloses a kind of repairing structure of big leak at high tolerance landfill gas on refuse landfill cover layer, including with the gas barrier wall of leaky cover layer, adhesive plaster, repairing film and at least one cross section for annular shape；Gas barrier wall is arranged on cover layer with removing using leak as the center of circle is removable, and the adhesive plaster, repairing film are arranged in the border circular areas that the gas barrier wall of innermost layer is surrounded；Gas barrier wall is made up of two layers of sand pocket circle being stacked up and down, and every layer of sand pocket circle is mutually connected into circle closely from beginning to end by several sand pockets using leak as the center of circle, successively；Adhesive plaster is pasted on cover layer leak is completely covered；Repairing film, sealing welding is on cover layer adhesive plaster is completely covered centered on leak, and repairing film edge is more than 0.3m from the distance between leak outer rim.The utility model is simple in construction, easy construction, safe, fundamentally solves on refuse landfill cover layer that big leak is difficult to repair, welds the problem of risk is high at high tolerance landfill gas.
Description
Technical field
The utility model belongs to high on refuse landfill construction repairing field, more particularly to a kind of refuse landfill cover layer
The repairing structure of big leak at tolerance landfill gas.
Background technology
Because the landfill gas that junk-heap body is distributed has stench, surrounding enviroment and people's life are had a strong impact on, are filled simultaneously
Methane or landfill gas in gas, freely dissipate easily generation fire and cause security against fire accident, therefore refuse landfill is transported
Interim interim covering is carried out in battalion using the good antiseepage film of air-tightness (conventional HDPE film and LLDPE film) as one kind to be required
Common practice, landfill gas, which is closed under cover layer both be emitted in air, causes foul smell to disturb residents, and can also be concentrated
Collect processing or utilize, but because junk-heap body surface smoothness is poor, there is sharp object and rubbish during actually operation
The problems such as heap body is settled, cover layer cracky needs often to repair breakage.
As shown in figure 1, containing a large amount of flammable explosive gas methane (CH4) landfill gas escaped at leak 21, if directly
The serious accidents such as personnel's poisoning, landfill gas burning or even blast can be caused by tapping into the repair by welding of row leak.Leak 21
The tolerance height and methane concentration at place are to influence the key factor of repair technology and structure, and usual tolerance height can be with following two
Mode is judged：1) it is placed in paper handkerchief above hole at about 5cm, sees whether paper handkerchief waves, be high tolerance if paper handkerchief waves
Area, if paper handkerchief does not wave as low tolerance area；2) closed with adhesive plaster 30 behind damaged hole, whether the cover layer on observation hole periphery goes out
Existing eardrum, if as shown in Fig. 2 being closed with adhesive plaster 30 after leak 21, the cover layer on periphery is substantially heaved, then is high tolerance area；If
The cover layer on periphery is not substantially heaved, then is low tolerance area.Using portable methane concentration detector, 1 around leak 21
The real-time monitoring of whole methane concentration is carried out in rice regional extent, if methane concentration is below 1% and leak 21 is in low tolerance
The small leak (diameter be less than 5mm) in area, because its risk is low, directly single track can weld and repaired；But for being in high tolerance
The big leak in area, perplexs site operation personnel because its is large-minded, risk is high, does not have facilitate feasible method so far all the time.
The content of the invention
The technical problems to be solved in the utility model is to provide a kind of construction safety, easy to operate refuse landfill landfill
Cover layer leak repairing structure under gaseous environment.
In order to solve the above technical problems, the present invention uses following technical scheme：
On a kind of refuse landfill cover layer at high tolerance landfill gas big leak repairing structure, including with leaky
Cover layer, adhesive plaster, repairing film and at least one cross section are circular gas barrier wall；Gas barrier wall is using leak as circle
The heart is removable to be arranged on cover layer with removing, and the adhesive plaster, repairing film are arranged at the circle that the gas barrier wall of innermost layer is surrounded
In region；
Prevent the gas barrier wall that flow at leak of landfill gas that junk-heap body is produced by be stacked up and down two
Layer sand pocket circle composition, every layer of sand pocket circle is by several sand pockets leak to be repaired using on cover layer as the center of circle, head and the tail are closely successively
Circle is mutually connected into, the internal diameter of the gas barrier wall of innermost layer is 1~1.5 meter, and multiple gas barrier walls are by the center of circle of leak in same
Heart circle distribution；
Prevent landfill gas from being pasted from the adhesive plaster overflowed at leak on cover layer leak is completely covered centered on leak；
Sealing welding is on cover layer adhesive plaster is completely covered centered on leak for the repairing film, and repairing film edge is from leakage
The distance between hole outer rim is more than 0.3m.
Preferably, sand pocket circle in upper strata with setting with staggering above and below the sand pocket seam crossing of lower floor sand pocket circle.
It is highly preferred that the sand pocket is packed full with middle sand using 25kg standard bags.
Further, second gas barrier wall, second gas are set at 1 meter of the gas barrier wall periphery of innermost layer
It is the donut using leak as the center of circle to obstruct wall and first of gas barrier wall.
Most preferably, the HDPE film that the cover layer, repairing film are 1.5mm~2.0mm；The adhesive plaster be 3M viscose glues and
The strength adhesive plaster of the combination of 1.0mm thickness smooth surface films.
Compared with prior art, the utility model has the advantages that：
(1) the gas barrier wall that the landfill gas that including at least one can prevent junk-heap body from producing is flow at leak,
The gas barrier wall can will be changed into the low tolerance area of safe operation from the high tolerance area of operational hazards at leak, be greatly reduced
Weld job risk.
(2) adhesive plaster is pasted onto on cover layer leak is completely covered centered on leak；So that hole area has necessarily
Air-tightness, prevent landfill gas from being overflowed from leak, it is to avoid burning or risk of explosion in welding process.
(3) sealing welding is on cover layer adhesive plaster is completely covered centered on leak for repairing film, repairing film edge and leakage
The distance between hole outer rim should be greater than 0.3 meter, it is ensured that repairing film has safe enough buffer distance with broken hole edge, it is ensured that repairing effect
Really.
The utility model is simple in construction, easy construction, safe, fundamentally solves on refuse landfill cover layer
Big leak is difficult to repair, welds the problem of risk is high at high tolerance landfill gas.
Brief description of the drawings
The present invention is explained in further detail with reference to the accompanying drawings and detailed description.
Fig. 1 is the schematic diagram that landfill gas is escaped by leak
Fig. 2 is the schematic diagram that adhesive plaster is closed after high tolerance area leak, leak periphery cover layer is substantially heaved
Fig. 3 is the repairing structural representation of big leak at high tolerance landfill gas on embodiment refuse landfill cover layer
Fig. 4 is the schematic diagram that embodiment sets twice gas barrier wall
Fig. 5 is that the sand pocket above and below embodiment gas barrier wall on two layers of sand pocket circle sets schematic diagram
Embodiment
As shown in Fig. 3~Fig. 5, on a kind of refuse landfill cover layer at high tolerance landfill gas big leak repairing knot
Structure, including cover layer 20, adhesive plaster 30, repairing film 40 and at least one cross section for being covered on junk-heap body 10 are annular shape
Gas barrier wall 50, with leaky 21 on cover layer 20, gas barrier wall 50 is that the center of circle can at any time tear open and set with removing with leak 21
It is placed on cover layer 20, is 1 meter (or 1~1.5 meter), the adhesive plaster positioned at the internal diameter of the gas barrier wall 50 of innermost layer
30th, repairing film 40 is arranged in the border circular areas that the gas barrier wall 50 of innermost layer is surrounded.
Gas barrier wall 50 is made up of two layers of sand pocket circle being stacked up and down, and every layer of sand pocket circle is by several sand pockets 51 with to be repaired
The leak 21 of benefit, which is the center of circle, head and the tail are close successively is mutually connected into circle, and gas barrier wall 50 can prevent filling out for the generation of junk-heap body 10
Bury gas to flow at leak 21 so that the landfill gas at leak 21 is reduced at low tolerance, reduction leak 21 by high tolerance
The concentration of methane gas；In embodiment, the setting as shown in figure 5, the sand pocket seam crossing of upper strata sand pocket circle and lower floor's sand pocket circle staggers,
Increase gas barrier wall 50 and obstruct the ability of gas and the steadiness of increase gas barrier wall 50.
The ground of leak 21 is completely covered centered on leak 21 and is pasted onto on cover layer 20 for the adhesive plaster 30 so that hole area
With certain air-tightness, prevent landfill gas from being overflowed from leak 21, it is to avoid burning or risk of explosion in welding process.
The ground sealing welding of adhesive plaster 30 is completely covered on cover layer 20 in repairing film 40 centered on leak 21, repairing film 40 side
The distance between edge and leak outer rim are more than 0.3m, it is ensured that leak 21 has enough length when further tear occurs in fortuitous event
Buffer distance, to repairing film protect, increase lifting surface area.
In embodiment, sand pocket 51 is packed full with middle sand using 25kg standard bags.Tolerance detection is carried out at leak 21, is examined simultaneously
The methane concentration leaked hunting in the range of the surrounding 1m of hole 21, if the tolerance at leak 21 is still high tolerance, or the surrounding 1m scopes of leak 21
Interior methane concentration is higher than 1%, as described in Figure 4, then second gas is set at the peripheral 1m of innermost layer gas barrier wall 50
Wall 50 is obstructed, second gas barrier wall 50 and first of gas barrier wall 50 are with concentric circles of the leak 21 for the center of circle.
In embodiment, the cover layer 20, repairing film 40 are the HDPE film that thickness is 1.5mm~2.0mm；The adhesive plaster 30
For 3M viscose glues and the strength adhesive plaster of the thick light mask compositions of 1.0mm, the adhesive plaster of other intensity of prior art can be also used, as long as can be full
Its corresponding function of foot.
In embodiment, on the refuse landfill cover layer at high tolerance landfill gas big leak repairing structure can by with
Lower step construction：
One, landfill gas concentration is controlled and monitored：
On cover layer 20, by several sand pockets 51 with leak 21 be the center of circle, it is end to end pile lower floor's sand pocket circle,
Folded on lower floor's sand pocket circle and set upper strata sand pocket circle, form connecing between gas barrier wall 50, the two neighboring sand pocket 51 of upper strata sand pocket circle
Stagger above and below seam between seam and the two neighboring sand pocket 51 of lower floor's sand pocket circle, be not located on the same line, prevent gas from hindering
The landfill gas of the periphery of partition wall 50 is from the sand pocket joint leadkage of up/down perforation to the inner ring of gas barrier wall 50, while increasing gas
Obstruct the steadiness of wall 50.
After taking gas barrier wall 50 to obstruct landfill gas, although the landfill gas escaped from leak 21 will subtract significantly
It is few, but can not avoid completely, therefore operating area need to be blown using explosion-proof fan, persistently dilute methane concentration, it is ensured that
The methane concentration moment at leak 21 is in safety limit.Explosion-proof fan specification should use flow Q >=2200m3/ h, bore D >=
More than 300mm, blower fan is placed on the upwind of leak 21, persistently blown away from leak 1m or so, air mass flow in enhancing hole area.
One piece of paper handkerchief is placed at the about 5cm of the top of leak 21, if paper handkerchief does not wave, is illustrated at now leak 21 to be low
Tolerance area, if methane concentration detectable concentration is simultaneously less than 1%, can open explosion-proof fan and carry out next step operation；
If it is now low tolerance area at leak 21, but methane concentration detectable concentration is higher than 1%, then using explosion-proof fan to making
Industry region is blown, and dilutes the methane concentration of operation area, it is ensured that the methane concentration at leak hole is in safety limit.Until workspace
Methane concentration detectable concentration be less than 1%, then keep explosion-proof fan continuous firing, proceed next step operation；
If still it is now high tolerance area at leak 21, and methane concentration detectable concentration is higher than 1%, then in gas barrier wall 50
Peripheral 1m at second gas barrier wall 50 be set and open explosion-proof fan, then re-start progress tolerance inspection at leak 21
Survey and the surrounding 1m of leak 21 in the range of methane concentration detection, so circulation, at leak 21 be low tolerance area, if methane is dense
Spend detectable concentration and be less than 1%, just keep explosion-proof fan continuous firing, proceed next step operation.
Two, leak 21 is repaired
Confirm after being less than 1% at leak 21 for low tolerance area and workspace methane concentration, by the cover layer around leak 21
20 wiped cleans, close leak 21 so that hole area has certain air-tightness, further according to the size of leak 21 with adhesive plaster 30
Cut repairing film 40, the size of repairing film 40 should stretch out at least 0.3m from the outer rim of leak 21, then will repairing film 40 with
It is completely covered on centered on leak 21 on adhesive plaster 30, finally by the repairing surrounding of film 40, hermetically single track is welded on cover layer 20,
The distance between leak outer rim of any point and its nearest neighbours on weld seam is more than 0.3m.
After the completion for the treatment of that leak 21 is repaired, you can tear sand pocket 51 of moving open, recover the original state of cover layer 20, without prejudice to rubbish
Landfill yard is continued to run with.
Claims (5)
1. on a kind of refuse landfill cover layer at high tolerance landfill gas big leak repairing structure, it is characterised in that：Including
Cover layer (20), adhesive plaster (30) with leaky (21), repairing film (40) and at least one cross section are circular gas
Obstruct wall (50)；Gas barrier wall (50) is arranged on cover layer (20) with removing with leak (21) for the center of circle is removable, the adhesive plaster
(30), repairing film (40) is arranged in the border circular areas that the gas barrier wall (50) of innermost layer is surrounded；
The landfill gas for preventing junk-heap body (10) from producing flow to the gas barrier wall (50) at leak (21) place above and below
Stacked two layers of sand pocket circle composition, every layer of sand pocket circle is by several sand pockets (51) with leak (21) to be repaired on cover layer (20)
For the center of circle, head and the tail are mutually connected into circle closely successively, and the internal diameter of the gas barrier wall (50) of innermost layer is 1~1.5 meter, multiple gases
It is that the center of circle is distributed in concentric circles that wall (50), which is obstructed, with leak (21)；
Prevent the adhesive plaster (30) that landfill gas overflows from leak (21) place leak (21) is completely covered centered on leak (21)
Paste on cover layer (20)；
The repairing film (40) adhesive plaster (30) is completely covered centered on leak (21) on cover layer (20), repair by sealing welding
Mend film edge and be more than 0.3m from the distance between leak outer rim.
2. on refuse landfill cover layer as claimed in claim 1 at high tolerance landfill gas big leak repairing structure, its
It is characterised by：Upper strata sand pocket circle with setting with staggering above and below the sand pocket seam crossing of lower floor sand pocket circle.
3. on refuse landfill cover layer as claimed in claim 2 at high tolerance landfill gas big leak repairing structure, its
It is characterised by：The sand pocket (51) is packed full with middle sand using 25kg standard bags.
4. on refuse landfill cover layer as claimed in claim 3 at high tolerance landfill gas big leak repairing structure, its
It is characterised by：Second gas barrier wall (50), second gas are set at 1 meter of gas barrier wall (50) periphery of innermost layer
It is with donut that leak (21) is the center of circle to obstruct wall (50) and first gas barrier wall (50).
5. big leak is repaiied at high tolerance landfill gas on the refuse landfill cover layer as described in any one of Claims 1 to 4
Mend structure, it is characterised in that：The cover layer (20), the HDPE film that repairing film (40) is 1.5mm~2.0mm；The adhesive plaster
(30) for the thick smooth surface film of 3M viscose glues and 1.0mm combination strength adhesive plaster.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720077819.7U CN206500424U (en) | 2017-01-20 | 2017-01-20 | On refuse landfill cover layer at high tolerance landfill gas big leak repairing structure |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201720077819.7U CN206500424U (en) | 2017-01-20 | 2017-01-20 | On refuse landfill cover layer at high tolerance landfill gas big leak repairing structure |
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| CN206500424U true CN206500424U (en) | 2017-09-19 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112624221A (en) * | 2020-12-07 | 2021-04-09 | 中城建胜义(深圳)环境科技有限公司 | Operation method for repairing floating cover film with water |
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2017
- 2017-01-20 CN CN201720077819.7U patent/CN206500424U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112624221A (en) * | 2020-12-07 | 2021-04-09 | 中城建胜义(深圳)环境科技有限公司 | Operation method for repairing floating cover film with water |
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