Reconstructive jacking UNESCO Heritage

the secured "Wevershuisjes"

Due to a breach in a wall of a subway station under construction the famous "wevershuisjes" subsided towards a single corner as much as 24cm within a few seconds, leading to near collapse. We've monitored the reconstructive jacking as assignment from the city of Amsterdam to prevent further damage.

Visualizing the jacking

The movie below shows how we visualized the relative motion due to the reconstructive jacking during the 5 days of jacking.

The result on the outside

By marking a streetlight pole with tape, adding a level (visor) to the buildings to be lifted and taking a series of photos a movie of the lifting was created.