A test pit was dug to 4.2 m. From top to bottom, it was 1.6 m silty clayey sand, 0.9 m peat/organic silt, and 1.7 m mineral silt. The bottom of pit was examined immediately after excavation and it was stiff silt but after half an hour the silt materials spalled and caved in. GWL was at top of silt layer. The silt on the wall appeared to be firm. A photo is attached.
What does the spalling of wall suggest to an engineer. Could the silt be soft or.. Thanks.
Additive manufacturing, also known as 3D printing, is quickly becoming an industry standard for product manufacturing in a variety of applications, including medical devices, aviation and aeronautics parts, and transportation components. Download Now
The growing complexity of automotive systems is putting a large amount of pressure on their designers. Industry constantly pushes to add new features for comfort, entertainment, and safety, requiring a single vehicle to use an increasing number of communicating electronic devices. Download Now
Fly by wire, remotely distributed control, remote and automated piloting, and augmented reality are a few evolutionary achievements in flight control and guidance that further remove the potential of human error in flight control systems. Download Now