Geomembrane

The problem of service life of composite geomembrane

2020-05-18
Repairs should be postponed to areas at least 30 cm outside the size of the damaged composite geomembrane. In terms of the reinforcement effect, compared with the acupuncture composite geomembrane, the geogrid and the reinforced geotextile can be enlarged and stained under small strain, and the acupuncture geotextile has the geogrid and the geotextile in the plane of geosynthetic material No water permeability. The composite geomembrane used is mainly made of plastic film and has no loss of impermeability and waterproofing. According to the national standard of the Soviet Union, a 0.2-meter-thick polyethylene film with a fixing agent is used for 30 to 40 years under water purification conditions. The construction team must not wear work shoes and construction tools that may damage the geotextile. The construction team shall not carry out any use that may cause risks on the geotextile, such as smoking with sharp tools or poking the soil. The heat loss must be strictly controlled to ensure that the composite geomembrane patch is closely connected with the geotextile, and cannot be swallowed by the geotextile.

If the crack on the slope exceeds 10% of the total width of the coil, the geotextile roll should be removed and replaced with a new roll.



The repair of composite geomembrane damage should meet the following technical standards: the raw materials of the patch used for repairing holes or cracks should be the same as the geotextile. In the past, after the laying of each day, all the laying of geotextiles was carried out. The visual investigation was carried out. The areas that were completely destroyed. The colleges were marked and repaired immediately. Be sure to lie down and investigate. There are no external raw materials, which may cause damage, such as fine needles. Nails.
For example, the laminated laying of acupuncture geotextile and geogrid, the laying of acupuncture geotextile and spinning geotextile can be connected to each other, which has the effect of strengthening drainage. Geosynthetics are used for drainage systems (vertical direction and degree direction), geogrids and spinning geotextiles.
The service life of composite geomembrane can meet the anti-seepage regulations of highway engineering. Repairs should be postponed to areas at least 30 cm outside the size of the damaged geotextile. In the specific operation, different geosynthetic materials can be selected for the composition, so that the reinforcement effect is more outstanding. When repairing geotextile damage, the raw materials for repairing holes or cracks should be consistent with the geotextile. Geosynthetics can be reinforced and impregnated with soil slopes. At the bottom of the landfill, if the geotextile tears more than 10% of the total width of the coil, the damaged part should be disconnected, and then the two adjacent geotextiles should be disconnected.
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