Inorganic clays of low to medium plasticity – answer CL
Organic silts and silt clay, low plasticity – answer OL
inorganic clayey silts, elastic silts – answer MH
Inorganic clays of high plasticity – answer CH
organic clays and silt clays – answer OH
Types of slope stability - answer Drainage
slope reduction or flattening
structural solutions
chemical stabilization
, what would stabilize a slope that has been effected by seepage water? how does this
improve slope stability? - answer Sub- drainage, decreases the saturation of the slope
when a slope begins at vertical cut what is done to stabilize the slope? - answer
removing the upper portions or head of the slope or landslide is the frequently employed
technic for reducing the driving forces that cause the failure to occur
what are red lights on a site? - answer low bearing capacity
settlement
existing uncontrolled fill
slope stability
dangerous seismic conditions
frost heave
constructability- piers or piles
proposed significate cut or fill
groundwater problems
foundation red lights - answer design not in accordance with geotechnical
recommendations
foundation location differs from site investigation location
foundation plans not adequate or complete
low bearing capacity not recognized in footing design
compressible or expansive soil on site not anticipated in design
water seepage not anticipated in design
seismic conditions not documented properly in design or calculations
provisions dealing with frost heave not included
retaining structures or basement walls without adequate drainage
underfloor crawl space not vented or drained
when should concrete be placed? and what raises red flags in the design? -
answerwithin 90 minutes of adding water at the concrete plant
excessive water should not be added at the site, no more the 5 gallons per truck
if air temperatures are higher then 90 degrees and the humidity is less then 25 percent ,
concrete may suffer drying shrinkage cracking
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