Hybrid seismic surveying is the appropriate surveying method to apply for information about slope instabilities, notably about the depth of the sliding surface and for mapping the internal structures in the subsurface favouring karst dissolution and sink holes.
- Example 1: Determination of the cubature of a moving mass
- Example 2: Major sinkhole collapse with complete destruction of a 3-storey residential building
Example 1: Determination of the cubature of a moving mass
Example 2: Major sinkhole collapse with complete destruction of a 3-storey residential building
The sinkhole collapse resulted in cracks and crevices up to 15 cm wide in all rooms of a house which had then to be demolished:
Following the sink hole collapse a hybrid seismic survey was carried out with 7 lines totalling 3’100 m. The seismic line pictured below runs across the sink hole site. A well was drilled prior to the seismic survey.
Seismic mapping of the subsurface structures after filling the dolina with gravel:
More insights are gained by the pictorial evolution history provided by the interpretation of the results of the hybrid seismic data processing.