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HDPE membrane anti-seepage structure of liquid storage pool on rock and soil base

Inactive Publication Date: 2015-09-09
BEIJING TRUHERO ENVIRONMENTAL PROTECTION TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The air bag problem affects the capacity of the pool body, reduces the use value, and there is a safety hazard when the gas under the membrane gathers

Method used

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  • HDPE membrane anti-seepage structure of liquid storage pool on rock and soil base
  • HDPE membrane anti-seepage structure of liquid storage pool on rock and soil base
  • HDPE membrane anti-seepage structure of liquid storage pool on rock and soil base

Examples

Experimental program
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Effect test

Embodiment Construction

[0014] A groundwater drainage pipe (4) is placed in the underground trench at the bottom of the pool to collect the liquid drained by the plastic permeable blind trenches (3) at the bottom and slopes of the pool, and the plastic permeable blind trenches (3) form the groundwater drainage of the liquid storage pool. row system.

[0015] After 50cm of compacted clay is set on the groundwater drainage system on the geotechnical base surface, a plastic permeable blind ditch (3), a geotextile (2) and an HDPE geomembrane (1) are laid. An interval of 1m to 3m is set between the plastic permeable blind ditches (3), which can be laid to the top of the slope (7) and fixed with anchoring nails.

[0016] Air holes (5) with a diameter of 10 cm are opened on the HDPE geomembrane (1) on each side of the pool wall, and the plastic water-permeable blind ditch (3) constitutes a gas channel under the membrane for discharging gas under the membrane. The edge of the air hole (5) is at least 20cm a...

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Abstract

The invention discloses a high-density polyethylene (HDPE) membrane impervious structure of a rock and soil base liquid storage tank, which is applied to seepage prevention of a rock and soil base liquid storage tank. The tank body and side slope impervious structure is an underground water drainage system composed of an HDPE geomembrane (1), geotechnical cloth (2), a plastic permeable blind ditch (3) and an underground drainage pipe (4) from top to bottom, wherein the HDPE geomembrane (1) is 2mm thick; the geotechnical cloth (2) is a filament non-woven geotextile of which the specification is 200g / m<2>; the plastic permeable blind ditch (3) is 10cm wide and 3cm thick. Air holes (5), of which the diameters are 10cm, are formed in the geomembrane above the highest level of each tank wall and below a slope top (7); the distance from a circle center of each air hole to the slope top (7) is 30cm; a geomembrane cover, which is 20cm long and 25cm wide, covers each air hole (5); the horizontal edge, near the slope top (7), of the geomembrane cover is sealed by an extrusion welding part (6); a half of two adjacent vertical edges are sealed by an extrusion welding part (6); liquid on the membrane is prevented from leaking below the membrane through the air holes (5), and meanwhile, gas is discharged.

Description

technical field [0001] The invention relates to an HDPE membrane anti-seepage structure, in particular to an HDPE membrane anti-seepage structure used for a liquid storage tank on a rock-soil base surface. Background technique [0002] The anti-seepage method of HDPE geomembrane is used in liquid storage tanks. Compared with concrete anti-seepage, it is suitable for various irregular pools. The construction period is short, the construction difficulty is low, and the anti-seepage effect is good, so it is more and more widely used. At present, most of the HDPE membrane anti-seepage structures of liquid storage pools are built on rock-soil rammed foundations. Due to the design of anti-seepage structures, the groundwater level and gas of the ground under the geomembrane, after water injection is completed, there is often a problem of laying and welding. The HDPE film produces bulging bulges called air pockets. The gas bag problem affects the capacity of the cell body and reduc...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E02D31/02
Inventor 杜新辉刘杰杨菲王杰
Owner BEIJING TRUHERO ENVIRONMENTAL PROTECTION TECH
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