Excavation and Reinforced Concrete Works in Wormwood Scrubs We will be excavating a launch shaft to prepare the area to launch the micro-tunnelling machines. As part of this work, we will also be installing concrete structures in the ground to enable the micro-tunnelling to be carried out. To complete this work an excavator will dig … Continue reading Update: Notice of launch pit excavations, reinforced concrete works and micro-tunnelling on Wormwood Scrubs