Seepage Prevention: In projects such as earth-rock dams and levees, waterproof geotextiles can effectively prevent water seepage, reduce seepage damage, and improve the stability of dams and levees.
Filtration and Drainage: Used as the filter layer for wells, relief wells, and inclined pressure pipes, as well as for the drainage behind the impermeable geomembrane in earth dams or embankments and at the lower part of concrete facing. It allows water to pass through while preventing the loss of soil particles and the like.
Reinforcement and Strengthening: Enhance the tensile strength and deformation resistance of the soil mass. It is used to reinforce levees, the bodies of earth-rock dams, etc., improve the quality of the soil mass, and increase the stability of the engineering structure.
Protection: In projects such as river revetments and sea dikes, it can diffuse, transfer, or decompose concentrated stress, prevent the scouring and damage of the soil mass by water flow, and protect the soil.
Isolation: It can isolate building materials with different physical properties, such as soil mass and sand grains, soil mass and concrete, etc., to prevent them from being lost or mixed, and maintain the overall structure and function of the materials.
Key Points of Construction
Preparation before Laying: Clean up the site, remove sundries, weeds, etc. within the laying area to ensure that the laying surface is flat and free of obstacles; according to the design drawings, conduct surveying and setting out to determine the laying range and position of the geotextile.
Laying Method: Usually, manual rolling laying is adopted. The fabric surface should be flat, and an appropriate amount of deformation allowance should be reserved; the connection of geotextiles can adopt methods such as lap joint, stitching, and welding. The width of stitching and welding is generally more than 0.1m, and the lap joint width is generally more than 0.2m.
Construction Precautions: The geotextile rolls should be protected from damage before installation and unfolding. During storage and transportation, they should be covered with opaque materials to prevent ultraviolet aging; the work shoes worn by construction personnel and the construction machinery and tools used should not damage the geotextile. During construction, stones, dust, etc. should be prevented from entering the geotextile or underneath it.
