A 0.45m square pile is to be driven at a depth of 10m into the soil. What is the allowable pile capacity? Use FS=3.0 and a Critical Depth of 4m for Loose Sand. GWT is at 3.0m from the Natural Grade Line (NGL). Qu = EQSF + QrQu = Ultimate Load CapacityEQSF = Load carried by friction developed at the side of the PileQr = Load carried at the Pile TipEQs = A,f, (Sand) + A,f; (Clay)• EQSF = Asfs (Sand) + Aşfs (Clay)For Sand LayerFor Clay Layerf, = o'n tana = K,oʻ, tanaf, = aS.on = Effective Horizontal Stressa = Empirical Adhesion Factor%3DSu = Undrained Shear strength at theO = Friction AngleClay LayerFor the Pile Tip, Qr = Ast ftQr = AST ftFor Sand LayerFor Clay Layerf = qNqf; = cNcAST = Area of the TipAST = Area of the Tip%3DNOTE: After the specified critical depth has been reached, effective stress alongthe pile remains constant regardless if it is clay or sand.Qfriction of clay depends on the given a and cQfriction of sand depends on effective stress, Nq, k and tan a NGLCriticalLoose Sand ydry=15kN/m3ysat=17kN/m3Nq=303mGWTDepth=4mØ=28tan a=0.454mK=3.0Hard ClayNc=910mC=200kPaysat=20kN/m3a=0.5Effective Stress

B (size of pile) = 0.45m d (depth of pile) = 10m FOS = 3

A 0.45m square pile is to be driven at a depth of 10m into the soil. What is the allowable pile capacity? Use FS=3.0 and a Critical Depth of 4m for Loose Sand. GWT is at 3.0m from the Natural Grade Line (NGL).

A 0.45m square pile is to be driven at a depth of 10m into the soil. What is the allowable pile capacity? Use FS=3.0 and a Critical Depth of 4m for Loose Sand. GWT is at 3.0m from the Natural Grade Line (NGL).

Structural Analysis

6th Edition

ISBN:9781337630931

Author:KASSIMALI, Aslam.

Publisher:KASSIMALI, Aslam.

Chapter2: Loads On Structures

Section: Chapter Questions

Problem 1P

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