根据《桩规》5.3.12，液化土层折减：地面下10m以内有2m粉土，$\psi_l=0$；10m以下有6m粉土，$\psi_l=1/3$。桩径400mm，壁厚95mm，内径$d_1=400-2\times95=210\mathrm{mm}$，$A_{p1}=0.25\pi d_1^2=0.0346\mathrm{m^2}$，$A_j=0.25\pi(d^2-d_1^2)=0.25\pi(0.16-0.0441)=0.0910\mathrm{m^2}$，$h_b/d_1=2/0.21=9.52>5$，$\lambda_p=0.8$。$Q_{uk}=u\sum q_{sik}l_i+q_{pk}(A_j+\lambda_p A_{p1})=3.14\times0.4\times(30\times2+0+6\times1/3\times40+12\times40+2\times80)+4000\times(0.0910+0.8\times0.0346)=1.256\times(60+0+80+480+160)=1.256\times780=979.7+4000\times(0.0910+0.0277)=979.7+4000\times0.1187=979.7+474.8=1454.5\mathrm{kN}$，选B。