Soil Investigation and Clarifications of Groundwater Conditions, Stierli Site, Zürich-Seebach

The project

Location: Zürich-Seebach in the canton of Zürich
Customer: Stierli Real Estate AG
Phases: Soil investigation, clarification of the groundwater conditions, material replacement plan
Duration: 2017-2018


A new construction is to be developed on this industrial site. To this end, Ecosens AG explored the geological and hydrogeological conditions in detail by means of core drilling, dynamic probing and pumping tests. A soil model was produced with a detailed description of the geological layers. In addition, construction engineering considerations were made with regards to the foundation and excavation pit design. Various pumping tests were also evaluated, and the permeability of the aquifer was determined at several points on the site. The local hydrogeological situation was described in detail. As part of a material replacement plan, calculations were performed to obtain the flow capacity.


Our services

  • Clarifying the soil situation, evaluating existing core drills
  • Creation of a soil model, detailed analysis of all subsoil layers from a geotechnical perspective in relation to the new build
  • Detailed description and depiction of the local groundwater conditions, evaluation of pumping tests, calculating flow capacity
  • Creation of a material replacement plan to obtain the flow capacity


  • Large industrial site confined on all sides by SBB railway tracks
  • Depth excavation down to 8 m below the ground and thus into the water table fluctuation range (points of installations in the groundwater)
  • Listed buildings present, which have to be preserved

Project manager:

Domokos Fazakas Project manager: contaminated sites and building land
Diploma in Geological Engineering +41 44 839 47 98 More

Michael Rüffer Partner, Projektleiter Altlasten
Dipl. Phil.II, Geologe, Hydrogeologe CHYN +41 44 839 47 81 Mehr