84” Utility Conduit Installation
84” Utility Conduit Installation, Washington DC
580 foot Installation of 101.5 inch OD Reinforced Concrete Pipe in a 700 foot radius curve at a depth of over 50 feet by Microtunneling. Soil consisted of sandy silt with gravel. A VMT Guidance and Jack Control System were used to provide guidance and control of the curved alignment. Surveyed results were within ½ inch of design grade and line. Due to the location of this project, security constraints required the tunnel to be constructed inside two separate buildings. One building housed the separation plant and the other housed the launching shaft and pipe storage.
Winter of 2014/2015