论文部分内容阅读
为研究超长桩在水平荷载下的侧移,引入水平集中荷载作用下双层弹性体系的基本解答,利用数值积分得到双层土的侧移解,基于数值模拟建立位移修正函数,提出分层土中水平受荷超长桩侧移修正计算方法。通过算例对分层土中超长桩侧移性状进行了分析并对该方法的正确性和可行性进行了验证。结果表明:利用侧移修正法计算超长桩在水平荷载下的侧移解,能较好地反映土的分层情况、土层刚度的影响、桩的基本特性及水平荷载的变化。在分层土中,桩身侧移量随着土层的相对弹性模量比E2/E1的增大而减小;随着浅层土厚增大而增大,但弹性模量比对侧移的影响程度大于浅层土厚的改变。该方法方便实用,可避免数值模拟带来的时间消耗和不易收敛问题。
In order to study the lateral displacement of super-long pile under horizontal load, the basic solution of double-layer elastic system under horizontal concentrated load is introduced. The lateral solution of double-layer soil is obtained by numerical integration, and the displacement correction function is established based on numerical simulation. Calculation method of lateral displacement of extra long pile in soil. The lateral displacement behavior of the super-long pile in layered soil is analyzed by examples and the correctness and feasibility of the method are verified. The results show that lateral displacement of super-long piles under lateral load can be calculated by using lateral displacement correction method, which can well reflect the stratification of soil, the influence of soil stiffness, the basic characteristics of piles and the horizontal load changes. In the layered soil, the lateral displacement of the pile body decreases with the increase of the relative elastic modulus of the soil layer with the increase of E2 / E1; with the increase of the shallow soil thickness, the elastic modulus is larger than that of the opposite side The extent of migration is greater than the change in shallow soil thickness. The method is convenient and practical, which can avoid the problem of time consuming and difficult to converge caused by numerical simulation.