Why Horizontal Directional Drilling (HDD)?
HDD allowed the insertion of the preferred HDPE sleeves without requiring the installation of a temporary pipe or permanent rigid pipe, followed by the HDPE pipe installation. HDD required no thrust abutment wall, and also allowed for adequate steering accuracy. The equipment is self propelled and capable of drilling in a wide range of soil conditions including clay and rock. It is also sufficiently compact and maneuverable to be able to operate in the confined basement spaces. Trenchless Technologies cc was established in 1991 and to date have completed over 220 000 metres of trenchless pipeline rehabilitation and new installation works. They have been the Southern African agent for Terra AG since 1993. Previous awards include: The SAICE Pretoria Branch award For Technical Excellence in 2000, along with The City of Tshwane and consultants Bigen Africa, for the rehabilitation of sewers in Mamelodi. The South African Society for Trenchless Technology (SASTT) Award of Excellence in 2007,
