Engineering geological exploration is generally carried out on the basis of engineering geological surveying and mapping. It can directly go deep into the underground rock layer to obtain the required engineering geological conditions, and it is a reliable method to prove the deep geological conditions. The main methods of engineering geological exploration are engineering geological drilling, pit exploration and geophysical prospecting. Their main tasks are:
To explore the rock and geological structure of the construction site, i.e. the thickness, nature and change of the layers in each place, to divide the formation and determine its contact relationship, to classify the weathering of the bedrock, to study the formation, crack development and changes in the formation and depth of the rock formation, and to study the spatial distribution and change of the spatial structure of the folds, fractures, break zones and other geological formations.
To explore hydrogeological conditions, that is, aquifer, water separation layer distribution, depth, thickness, nature and groundwater position.
To explore the ground and physical geological phenomena, including valley terraces, alluvial fans, slope formation situ position and soil layer structure;
Extract soil samples and water samples, to provide field test conditions. To remove geotechnical or water samples from drilling or exploration sites for indoor testing, analysis and identification. The pit holes formed by exploration can provide the site and conditions for the site in situ test.