Soil liquefaction
Soil liquefaction occurs when a saturated or partially saturated soil substantially loses strength and stiffness in response to an applied stress such as shaking during an earthquake or other sudden … Read More
Category: Geology engineering
Symbols used on topographic quadrangle maps produced by the U.S. Geological Survey.
Symbols used on topographic quadrangle maps produced by the U.S. Geological Survey. Control data and monuments Contours Boundaries Surface features Mines and caves Vegetation Glaciers and permanent snowfields Marine shoreline … Read More
What is Earthquake?
What is Earthquake? What are Effects of earthquakes? What causes earthquakes? Why does the earth shake? How are earthquakes recorded? Can scientists predict earthquakes? What is earthquake? An earthquake is … Read More
How Is Isostasy Related to Changes in Elevation?
How Is Isostasy Related to Changes in Elevation? Visualize what would happen if another small block of wood were placed a top one of the blocks in Figure 1. The … Read More
Underground structures in karst
Characterization of karst The name “karst” is used for sedimentary rock mass, which is apparently influenced by leaching processes of its water-soluble components. Mainly limestone, dolomite and gypsum are the … Read More
Earth Slope Stabilization/Mitigation
Some of the Earth Slope stabilization techniques that are currently available in North America are illustrated here. We highlight simple methods that can be used safely in the absence of … Read More
Logging of drillhole samples and Drilling contracts
Information from drillhole comes from the following main sources: rock, core, or chips; down-the-hole geophysical equipment; instruments inside the drillhole; and performance of the drilling machinery. In this section, we … Read More
Slope failure
The term slope failure covers a wide range of ground movements, such as rockfalls, deep failure of slopes, and shallow debris flows. Causes of Slope Failure: Gravity Although gravity acting … Read More
Horizontal and Vertical Geotechnical Variations of Soils using GIS
According to USCS Classification for the City of An-Najaf, Iraq The unified soil classification system (USCS) first proposed by Casagrande and subsequently developed by the Army Corps of Engineers (Geotechnical). … Read More
A sand model landslide compared to the 2018 Llusco event (with coordinates of the Llusco slide!)
By Philip S. Prince, sand model landslide If you Google the word “landslide”…the first search result you get is the Fleetwood Mac song. I suppose this says something about the … Read More