3 Drilling ProgramThe purpose of the Drilling Program is to determine the:Thickness,Lateral Extent, andPhysical Properties of Each Layer of SoilPresence, Depth and Pressure of Water in the SoilCoupled with the Topographic Survey, This provides a 3D view of the site and the soil underneath.If the Upper Soils are Weak, a Deep Foundation system must be developed.This investigation may also determine where to find suitable fill material from Borrow pits.
4 Site Investigation To Properly Characterize a Site requires: Literature Investigation to DetermineWhat Has Happened at the Site Before (Prior History)What Investigations have been Made Near the SiteGeology, USDA Soil Profiles, Utility Crossings, etc.On Site Surveying, Borings and Drilling, Bag Samples, etc.Laboratory Testing for Soil Properties and ClassificationProduce a Report about the site for the OwnerMaybe develop a Foundation Design, Retaining Structures, Embankments, Cuts and Fills
5 Borehole Drilling Drilling Rig Continuous Hollow Stem Augers With Removable Drill Rod And Center Head
16 or CPTu . Three basic measurements qc, fs, u2. Interpreting results• When pore pressure is collected, referred to as piezoconeor CPTu . Three basic measurements qc, fs, u2.• qc is typically corrected for pore pressure effects (qt).• qt = qc + u2(1-a), where a is net area ratio of tip, rangesfrom 0.6 to 0.8 depending on probe design.• Normalization for overburden stress.Qt = (qt-σvo)/σ′voFr = 100%[fs/(qt-σvo)]Bq = (u2-u0)/(qt-σvo) = pore pressure parameter