... certain materials For the first time in Vietnam , the filtering function , drainage was used in the retaining wall of the path to the bridge on National Road , Tan Thinh , Hanoi - Lang Son Geotextile ... enhance the load capacity and stability of the construction work in general and especially the ground up for work in the construction of roads and irrigation In the 80s of the last century geotextile ... systems in urban areas Trung Hoa - Nhan Chinh (Hanoi) , before spreading the layer of macadam people to spread a layer of geotextile Specifications for separating the sand embankment that separates...