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本文用初参数法对成层地基中的桩在侧向荷载下的内力与位移进行分析。由于侧向抗力系数 k 沿深度变化,再考虑到桩的入土段的抗弯刚度也改变时,现行的计算方法将十分费事.本文的解法。首先将它的入土段分成 N 个小段,对于每一小段都看成抗弯刚度 EJ_i 与抗力系数 K_l为常量的柱;然后给出每一小段用初参数表示的解,再利用各段之间的连续条件,给出内力与位移的一般表达式,并最后将问题归结为一个二元一次方程组的求解。从而使多层地基中桩的内力计算得到很大简化。文末还将本方法与其他方法的计算实例作了比较,说明该方法有较高的精度。对于非成层土基中的桩,不管取用何种侧向抗力系数模式,采用本文的方法时也是十分简捷的。
In this paper, the initial parametric method is used to analyze the internal forces and displacements of piles in stratified foundation under lateral load. Due to the variation of the lateral resistance coefficient k along the depth, considering the change of the bending stiffness of the soil into the soil, the current calculation method will be very troublesome. First of all, it is divided into N segments into the soil section, for each small section as bending stiffness EJ_i and resistance coefficient K_l as a constant column; and then give each small section with the initial parameters that the solution, and then use between paragraphs , Gives the general expression of internal force and displacement, and concludes the problem as a solution of a bivariate linear equations. Therefore, the calculation of the internal force of pile in multi-layered foundation is simplified greatly. At the end of this article, the method is also compared with the calculation examples of other methods, which shows that the method has higher accuracy. For strands in non-stratified soils, the method of this article is also very straightforward, no matter what lateral resistance coefficient model is used.