承台受剪承载力
h=1.1m,h0=1.06m
圆桩换算为方桩边长
bc=0.8d=0.8×0.6=0.48m
ax=1.9-0.4-0.6-0.24=0.66m
λx=ax/h0=0.66/1.06=0.623