GC | Bearing Capacity of Pile Foundations in Rock, AASHTO(2002)

B_r(m)

D_r(m)

C₀(MPa)

RQD(%)

L(m)

γ_c(kN/m³)

σ_c(MPa)

FS_st

FS_ss

F_st-c(kN)

F_ss-c(kN)

F_ss-t(kN)

            
                Formulas
                Referances
                Notations
              
              Qult = QSR + QTR - W (Compression)

              Qult = 0.7QSR + W (Tension)

              Qall = Qult / FS 

              QSR = Π BrDrqsr

              αE = 0.0231(RQD) - 1.32

              Cm = αEC0

              QTR = NmsC0AT

              AASHTO,2002 - 4.6.5.1-1

              AASHTO,2002 - 4.6.5.1-2

              AASHTO,2002 - 4.6.5.1-3

              AASHTO,2002 - 4.6.5.3.1-1

              AASHTO,2002 - 4.4.8.2.2-4

              AASHTO,2002 - 4.6.5.3.1-2

              AASHTO,2002 - 4.6.5.3.2-1

              Qult: Ultimate Axial Load Capacity

              Qall: Allowable Axial Load Capacity 

              QSR: Ultimate Side Resistance of Rock Socket 

              QTR: Ultimate Tip Resistance of Rock Socket 

              W: Weight of Shaft 

              FS: Factor of Safety 

              qsr: Ultimate Unit Shear Resistance Along Shaft/Rock Interface 

              Cm: Uniaxial Compressive Strength of Rock Mass

              αE: Reduction Factor 

              Nms: Tip Resistance Factor 

              AT: Socket Tip Area

Side Resistance
α_E = 0.0231(RQD) - 1.32 ≤0.15
α_E = 0.0231({{rqd | round:0}}) - 1.32
α_E = {{ae | round:2}}

C_m = α_EC₀
C_m = ({{ae | round:2}})({{c0 | round:2}})
C_m = {{cm | round:2}} MPa

σ_c = Min(C_m,σ_b)
σ_c = {{sigmac | round:2}} MPa ({{sigmacpsi | round:0}} psi)

q_sr = {{qsrpsi | round:0}} psi = {{qsr | round:0}} kPa (Figure 4.6.5.3.1A)

Q_SR = Π B_rD_rq_sr
Q_SR = ({{pi | round:2}})({{soket_capi | round:2}})({{soket_boyu | round:2}})({{qsr | round:2}})
Q_SR = {{QSR | round:0}} kN

Tip Resistance

N_ms =

(Table:4.4.8.1.2A)

Q_TR = N_msC₀A_T
Q_TR = ({{nms | round:2}})({{c0 | round:2}})({{kazikUcAlani | round:2}})
Q_TR = {{QTR | round:0}} kN

Compression Capacity - Static
Q_ult = Q_SR + Q_TR - W
Q_ult = ({{QSR | round:0}}) + ({{QTR | round:0}}) - ({{kazikAgirligi | round:0}})
Q_ult = {{qult_basinc | round:0}} kPa
Q_all = Q_ult / FS
Q_all = ({{qult_basinc | round:0}}) / ({{guvenlikSayisiSt | round:2}})
Q_all = {{qall_basincStatik | round:0}} kPa

Compression Capacity - Seismic
Q_all = ({{qult_basinc | round:0}}) / ({{guvenlikSayisiSs | round:2}})
Q_all = {{qall_basincSismik | round:0}} kPa

Tension Capacity - Seismic
Q_ult = 0.7Q_SR + W
Q_ult = 0.7({{QSR | round:0}}) + ({{kazikAgirligi | round:0}})
Q_ult = {{qult_cekme | round:2}} kPa
Q_all = Q_ult / FS
Q_all = ({{qult_cekme | round:0}}) / ({{guvenlikSayisiSs | round:2}})
Q_all = {{qall_cekme | round:0}} kPa