The work flow:
2.00 a.m.: The shoring work began at the foundation point once the construction track had been installed. The track-foundation-laying train was prepared at a nearby suburban railway siding at the same time. The foundation pipe (DN 813) was attached to the hydraulic vibrator and vibrated 6.5 metres into the ground along with the welded-on side plates once the track-foundation-laying train had been positioned at the foundation point. The Track-foundation-laying train was then converted on site to the Kelly drilling method for the purposes of boring out the foundation pipe down to the base.
The foundation pile was concreted with the reinforcement cage having been lifted into place that same evening.
The reinforcement work for the head foundation with the integrated anchor rods as a connection for the signal bracket to be fitted later was commenced the next morning.
The prefabricated concrete element was placed over the lost formwork, the anchor rods were aligned for the final time and the head foundation was concreted at around midday.
The track-foundation-laying train allowed the workers to complete the foundation for a signal bracket in an inaccessible location in less than 40 hours – and without the need to dismantle any railway infrastructure. A total success!