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1 引 言 我国公路桥涵地基与基础设计规范和铁路工程技术规范对钻孔桩轴向容许承载力[P]均给出了大体相同的计算公式(简称规范公式)。其形式为: a.对于柱桩 [P]=(C_1A+C_2Uh)R_0 (1) b.对于摩擦桩 [P]=1/2(Ulτ_P+Aσ_R) (2)以上各式中,A——桩底横截面面积;
1 Introduction China’s highway bridges and culverts foundation and foundation design specifications and railway engineering norms on the axial allowable bearing capacity of bored piles [P] are given roughly the same formula (referred to as the formula). For the post [P] = (C_1A + C_2Uh) R_0 (1) b. For the friction pile [P] = 1/2 (Ulτ_P + Aσ_R) (2) In the above formulas, Bottom cross-sectional area;