QUALITY ASSURANCE OF DIAPHRAGM WALLS AND JET GROUTING
The new frontier of 3D geoelettric survey
Adastra Engineering carries out quality controls to check leaky or defective diaphragm walls, measure the volume affected by the injections or check the continuity of the jet grouting. This method allows investigation of very large sectors at extremely reduced costs compared to traditional test through drillings. The geophysical survey through Electrical Resistivity Tomography (ERT) is particularly suitable for the study of diaphragms walls and jet columns. It is possible to acquire information both from deep and superficial layers, to perform both two-dimensional and three-dimensional surveys and to adapt the geometries to the morphological and geo-lithological setting of the areas to be investigated.
A resolutie technique
Individual sections or the entire length of the diaphragm wall can be tested, both in linear and in complex geometries. Each segment of the diaphragm wall is modeled three-dimensionally with the aid of electrodes positioned in a drilling hole and / or on the surface. The geometry of the surface lines and the electrode columns in the hole depends on the type, size and horizontal and vertical extension of the diaphragm wall and on the geological composition of the subsoil. Measurements can be performed both in groundwater and in unsaturated ground.