Compound type perpendicular seepage-proofing screen and application thereof
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A composite, barrier technology, applied in protection devices, buildings, infrastructure projects, etc., can solve the problem of pollutants seepage around, achieve good anti-seepage effect, simple construction, and solve the effect of seepage around
Inactive Publication Date: 2015-07-29
BEIJING GEOENVIRON ENG & TECH
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Problems solved by technology
[0004] The key technical problem to be solved by the present invention is the problem of pollutant leakage caused by the gap between the HDPE geomembrane and the impermeable layer at the bottom of the groove during the vertical groove laying
Method used
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Embodiment 1
[0051] The application method of the composite vertical anti-seepage barrier of the present embodiment comprises the following steps:
[0052] 1) Groove: Groove vertically along the periphery of the polluted site, excavate the bottom of the groove to the underground impermeable layer, and use mud to protect the wall during the vertical groove;
[0053] 2) Use 300-mesh grid cloth to encapsulate sodium-based bentonite with a particle size of 200 mesh to obtain the anti-seepage support part, form grooves on the surface of the anti-seepage support part, then insert HDPE geomembrane into the groove, and finally use plastic bolts to penetrate fixed.
[0054] 3) Insert the anti-seepage structure obtained in step 2) into the bottom of the tank in the retaining mud. (Note: In actual engineering operation, the vertical slots should be distributed circularly around the polluted site, or fan-shaped in the downstream of the groundwater in the polluted site, inserting one HDPE geomembrane ...
Embodiment 2
[0060] The method of this example is the same as that of Example 1, except that the no-hardening mud of this example is composed of bentonite, clay and water, wherein the mass ratio of bentonite, clay and water is 40:110:1000.
[0061] Anti-circulation effect:
[0062] After testing, the initial setting time of the self-hardening mud in this embodiment is 3.6 hours, and the final setting time is 18.8 hours; when the self-hardening mud is set, the permeability coefficient is 3.5×10 -8 cm / s.
Embodiment 3
[0064] The method of this example is the same as that of Example 1, except that the no-hardening mud of this example is composed of bentonite, clay and water, wherein the mass ratio of bentonite, clay and water is 50:100:1000.
[0065] Anti-circulation effect:
[0066] After testing, the initial setting time of the self-hardening mud in this embodiment is 3.8, and the final setting time is 19.2h; when the self-hardening mud is set, the permeability coefficient is 2.1×10 -8 cm / s.
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Abstract
The invention discloses a compound type perpendicular seepage-proofing screen which is used for preventing horizontal seepage of pollutants in soil or underground water. The compound type perpendicular seepage-proofing screen comprises a perpendicular flexible seepage-proofing part and a by-pass seepage preventing part, wherein the perpendicular flexible seepage-proofing part comprises a rectangular HDPE (high-density polyethylene) geomembrane; the by-pass seepage preventing part comprises a by-pass seepage preventing supporting part and self-hardening mud which coats the by-pass seepage preventing supporting part; the by-pass seepage preventing supporting part comprises gridding cloth and sodium-based bentonite encapsulated in the gridding cloth, and a groove is formed in the surface of the by-pass seepage preventing supporting part; the bottom of the perpendicular flexible seepage-proofing part is embedded and inserted into the groove of the by-pass seepage preventing supporting part, and the bottom of the perpendicular flexible seepage-proofing part is fixed with the by-pass seepage preventing supporting part through a bolt. The compound type perpendicular seepage-proofing screen has the advantages of being simple in construction, good in seepage-proofing effect, and the like, and can be used for solving the by-pass seepage problem on a joint of the HDPE geomembrane and an underground water-impermeable layer.
Description
technical field [0001] The invention relates to the field of environmental protection, in particular to a composite vertical anti-seepage system used for pollutant control and ecological environment restoration. Background technique [0002] With the rapid development of my country's industry, environmental pollution is also becoming more and more serious. The storage yards, heap leaching sites, and tailings ponds of some chemical and mining companies lack effective anti-seepage measures, resulting in industrial waste (liquid), chemical products, slag, etc. polluting the soil and groundwater, seriously endangering people's livelihood. environment to survive. [0003] At present, a variety of anti-seepage measures have been proposed for the storage yards and tailings ponds of chemical and mining enterprises to solve the pollution problems caused by them, such as rigid vertical anti-seepage technologies such as grouting curtains, stirring piles, and steel sheet piles. Howeve...
Claims
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Application Information
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