Information distortions

In Durgerdam, most homes are built on steel foundations (without piles). Normally, this type of foundation is used on sandy soil. In Durgerdam, the subsoil consists of (soft) clay and peat soil. It is possible that the home will gradually subside over the years because the soil beneath it is also subsiding. This type of subsidence is also referred to asautonomous subsidence: this autonomous subsidence can lead to autonomous deformations of the houses that occur without any specific (human) action preceding it. Based on previous measurements, we see that the autonomous subsidence of some houses is significant.

In addition to these autonomous deformations, (additional) deformations (relative deformations) may occur as a result of the work. An example of this is work on the dike: dike reinforcement is a major undertaking and can affect buildings on and along the dike. Because we want to limit the risk of nuisance and damage as much as possible, it is necessary to closely monitor the deformations.

A working group was previously set up to address the issue of subsidence. This resulted in a draft action plan. This has now been further developed and incorporated into the Future-Proof Durgerdam action plan, and the working group is no longer active as such.