针对某高速公路桥后高填方对其周围桩基的影响,分析了受负摩阻力影响的桩基的荷载特点,利用J.Boussinesq公式,推导出在矩形面积上三角形分布荷载作用下,桩周土层中任意点产生的附加应力的计算公式。做了两个假设,用附加应力来确定中性点深度,为以后计算桩的负摩阻力提供了一个思路。 Aiming at the influence of a post-bridge high embankment on the surrounding pile foundation, the load characteristics of the pile foundation affected by the negative skin friction are analyzed. Using the J. Boussinesq formula, it is deduced that under the triangular distribution load of the rectangular area, Calculation Formula of Additional Stress Generated at Any Point in Soil Layer. Two assumptions were made and the additional stress was used to determine the depth of the neutral point, which provided an idea for calculating the negative friction of the pile in the future.