Sand boils in construction pits

Sand boils can also occur when building underground structures, where lowering the groundwater is part of the construction process. Often use is made of the natural watertight clay layer in the soil combined with pumping If this clay layer has holes or pockets of sand in it the concentrated groundwater flows to the surface and causes a sand boil.

Fast and efficient action is required for these emergencies to prevent major damage to the construction pit, and not to be forgotten to the adjoining sites. B&W is a specialist in these situations and is always ready to be at any location in the Netherlands and Belgium within a few hours.  Our emergency team and equipment is always available to you for such interventions.