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从岩土体性质、地下水、时间效应、深度、桩截面尺寸及桩周地基土的变形量方面,讨论了影响地基系数的几个因素,给出了线弹性地基反力法计算弹性桩内力的通解,比较了几种线弹性地基反力法的分布形式、适用条件及其不足之处。以三峡库区万州区二层岩滑坡为例,对于3种不同地质环境中的抗滑桩分别采用K法、C法、M法计算抗滑桩的内力,结果表明:M法计算得到的抗滑桩承受的弯矩、剪力最大,桩水平位移最大,对桩周岩土体的应力最小;K法计算得到的弯矩、剪力最小,桩水平位移最小,对桩周岩土体的应力最大。根据万州区滑坡抗滑桩嵌岩段岩土体的质量等级,认为万州区抗滑桩设计采用M法较适宜,这对万州区今后滑坡治理设计具有重要的指导作用。
Several factors influencing the coefficient of foundation are discussed in terms of the characteristics of rock mass, groundwater, time effect, depth, the size of pile section and the deformation of foundation soil around the pile. The calculation of internal force of elastic pile by linear elastic foundation reaction Through the solution, the distributive forms, applicable conditions and deficiencies of several linear elastic foundation reaction methods are compared. Taking the second-level rock-landslide of Wanzhou District in the Three Gorges Reservoir area as an example, the internal forces of the anti-slide piles were calculated using K, C and M methods for the anti-slide piles in three different geological environments respectively. The results show that the calculated anti- The bending moment, the maximum shear force and the maximum horizontal displacement of the piles are the ones that have the least stress on the rock and soil body around the piles. The bending moment and the shear force calculated by the K method are the smallest and the displacement of the piles is the smallest. The most stressful. According to the quality grade of the rock and soil mass in the anti-slide piles of Wanzhou District, it is considered that the M method is more suitable for the design of anti-slide piles in Wanzhou District, which is of great guiding significance for the future landslide control design in Wanzhou District.