It is easy to weld the geotextiles that manual rolling and paving is enough. The surface should be flat with some deformation allowance left. The long or short nonwoven geotextiles are often bonded by lapping, seaming and welding. The seamed and welded overlap is generally more than 0.1m wide. The lapped overlap is generally more than 0.2m wide. For geotextiles with long exposure time, methods of welding and seaming are recommended. Continue seaming until the all the work is completed. (disconnected seaming is not allowed.) Before being bonded, the overlaps should not be less than 150mm wide. The minimum distance of seams to the edges (the exposed edge of material) is 25mm. The thread for seaming should be made from resin with tensile strength no less than 60N, with chemical resistance and UV resistance that are the same with that of geotextile or exceed that of geotextile. Any "missed stitch" should be avoid. Actions should be taken accordingly to prevent emission of soil, particulate matters or foreign matters.
