Realization of two microtunneling split levels from a single shaft — Lyngby, Copenhagen

To improve and extend the sewer system on Buddingevej in Lyngby, Copenhagen, we have conducted several drillings using the microtunneling technique.

Our client requested that the project be accelerated, otherwise the planning of the subsequent tramway construction would be jeopardized. To meet this demand, we have scaled up our drilling crews to extend the working hours. We have decided to carry out two boreholes at different levels from a single shaft (the height difference between the boreholes is approximately 1.60 meters). The unique aspect of this arrangement is that we can simultaneously realize a microtunneling diameter of Ø1186/1280 mm for a length of approximately 119 meters in one direction, and Ø774/860 mm for a length of approximately 56 meters in the opposite direction.