我国铁道部公布的、自1975年7月1日起试行的《铁路工程技术规范》第二篇桥涵(以下简称铁路桥规—75)的第2—474、2—544及2—573各条中规定:在桩基、管柱及沉井等墩台基础的内力计算中要考虑土的弹性抗力。当这类基础置于地面或局部冲刷线以下的深度h≤2.5/a时,可将 China’s Ministry of Railways announced that since July 1, 1975 onwards, “Railway Engineering Specifications,” the second bridge (hereinafter referred to as the railway bridge regulations -75), paragraphs 2-474,2-544 and 2-573 Stipulates that the elastic resistance of soil shall be taken into account in the calculation of the internal forces of the piers and pillars such as piles, pipe columns and caisson. When such foundation is placed below the ground or local scour line depth h ≤ 2.5 / a, can be