How Geomembrane Liners Help In Preventing Leakage and Seepage
It has always been difficult to prevent the loss of water and other liquids that are required to flow through open channels constructed in open ground. Geomembrane liners are linings used in canals oilfield secondary containment and other liquid conveying structures and are usually made from polymeric sheets that can be impregnated with asphalt, polymer sprays, and other materials to enhance their physical properties.
Geomembranes have a low permeability and act as liners or barriers that prevent seepage. When engineers need to use these geo filter fabric membranes they will look at the thickness of the membrane, its density, its mass per unit area and its properties that allow transmission of any liquid or other water through it. The tensile strength of the geomembrane, its tear, impact and puncture resistance, its anchorage strength, and its ability to resists stress at a single point will also help engineers decide the right membrane for any application.the membranes must also have properties that allow them to degrade slowly and last for long periods of time, so that the difficult and costly process of replacing them is delayed.
These membranes come in definite lengths and widths and in many cases it is required to join or seam two or more adjoining pieces together to allow for greater areas to be covered. This is done either through thermal means or through bonding agents.It is also common to allow for space for expansion of the membrane where long stretches need to be treated, and this can be easily achieved by providing folds or pleats, at regular intervals that must be designed in such a way that they do not hamper the flow of the liquid, if that is the purpose of the lining.
Geomembranes are used in a wide variety of situations where it is found necessary to retain water or soil. Where it is used to strengthen earthen embankments these membranes may allow for lesser permeability as this then helps the earth to bond while using the membrane as a reinforcement. They are often used in landfills so that the mass of earth or another material is better retained and whose spread can be controlled.
These membranes have also been effectively used to stop the spread of spillage. It can be very effective in stopping water from getting into sensitive areas.
They have also been used as waterproofing layers in buildings and roads. They can help in lining ponds and canals and are extensively used in inland fishing and other places where it is necessary to retain large bodies of water. They can also be helpful in landfills to prevent the leaching of hazardous waste into ground waters. They are also used for bank protection in coastal engineering and go a long way to prevent erosion by water and the wind. Some membranes have electrically conducting layers that enable them to be used to test for leaks and other defects.
Geomembranes must be designed for specific purposes if they are to give the long life and durability that is expected from them.