Geotechnical Engineering, Science, or Witchcraft?

VIDEO DESCRIPTION:

Play, download and edit the free video Geotechnical Engineering, Science, or Witchcraft?.

The field of geotechnical engineering seems to be filled with people who think that by poking their finger into some soil or hitting a rock with a hammer they can magically obtain all the material properties required for design (often we do). The material properties obtained by the magic finger include unit weight, effective friction angle, effective cohesion, undrained cohesion and elastic modulus. Even on major projects material properties are often conjured up on the basis of typical values according to soil consistency. Why don't we do more testing? On the same projects where we magic up the properties for the soil, we test three cylinders of concrete from every truck. Testing soil is difficult and expensive, there are challenges related to field sampling, laboratory preparation and physical constraints of apparatus. In some cases field testing is appropriate to the conditions. Field tests can be used in isolation, however when used in conjunction with appropriate laboratory testing there is potential to save significant resources, both time and materials in geotechnical design.

Download, play and edit free videos and free audios from Geotechnical Engineering, Science, or Witchcraft? using RedcoolMedia.net web apps