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在进行埋置桩的稳定性验算时,由于桩受有轴向力,故须考虑基桩屈曲(纵向挠曲)时长细比lp/r对材料容许应力的折减。但基桩埋入土中后,由于桩周土壤对基桩的约束作用很复杂,因之目前对基桩纵向挠曲的计算长度lp的确定多借用唐山铁道学院土力学地基基础
During the checking of the stability of embedded piles, the allowable stress reduction of the material should be taken into consideration when the pile is buckled (longitudinal deflection) due to the axial force of the pile. However, when the foundation pile is embedded in the soil, the constraint of the surrounding soil on the foundation pile is very complicated. Therefore, at present, the calculation of the length lp of the longitudinal deflection of the foundation pile is determined by borrowing the foundation of soil mechanics foundation of Tangshan Railway Institute