Exploratory works regarding the local ground conditions must be implemented in advance of new constructions of buildings, halls, common areas or other structures. Changes to existing structures such as extension, addition of floors or the installation of additional technical equipment with excessive weight, impact the structural stability of the building and/or neighbouring structures. To ensure damage-free buildings, exploratory works must be developed regarding the given ground conditions from Der Sachverständige 04/15, b.v.s Sachverständige “The technical subsoil testing on unsealed and sealed surfaces”
To meet the requirements of DIN 4022, we use various project relevant techniques in order to survey the subsoil. For the geotechnical investigations with an “intervention in the subsoil” we use drilling, dynamic or pressure probing, digs, etc. Sensory methods such as radar, the INN method, the geoelectric or seismic are performed without intervention into the subsoil and leave no traces in the construction field. Using these methods it is also possible to make areal assertions. Soil samples are subjected to mechanical and physical laboratory tests.
In presence of construction field results it would be possible to assess the settlement behaviour and risk of soil collapse. Depending on the ground and the load impact of the structure – dynamic/static – proposals are elaborated for the foundation such as shallow or deep foundation, underpinning, soil exchange or the improvement of load bearing capacity through chemical/physical be developed “supplements”. Especially on soft grounds the geosynthetics are of increasing importance.
Since foundation works and foundation structures are buried at the latest after completion of the works, the quality control is particularly important. Here damage caused are technically complicated to demonstrate and costly to eliminate. We perform control measurements of compression, check the quality and strength of filling materials and document the contract compliant production or installation of load transfer components.