Side Friction Resistance of Auger Cast Piles in Bedrock
Side Friction Resistance of Auger Cast Piles in Bedrock
(OP)
Does anyone have typical values that may be used. The bedrock I am dealing with is medium hard sandstone and limestone.
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Side Friction Resistance of Auger Cast Piles in Bedrock
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RE: Side Friction Resistance of Auger Cast Piles in Bedrock
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Concrete in soft disgregated middle strength rock maybe 0.55 to 0.60.
RE: Side Friction Resistance of Auger Cast Piles in Bedrock
RE: Side Friction Resistance of Auger Cast Piles in Bedrock
Tensile strength in the rock uses to be 10 to 15% percent of compressive atrength, and shear strength is not thought to be very dissimilar. DCR=10 woulg give allowable pressure of contact of around 2 MPa, 12.5% of which is 0.25 MPa, allowable, for shear strength.
For a DCR=10 you can estimate from correlations c=0.255 MPa coexisting with an angle of inner friction of only 15 deg sexagesimal.
Bond within the concrete in uncheckable area better not to be taken over 1 MPa ultimate, 0.66 MPa allowable.