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选取某一支护面上的任意一根桩为研究对象,设置一道支撑(或锚索或锚杆)及开挖至坑底,建立其受力平衡方程和位移协调方程。通过圈梁的协调作用,将研究对象扩大到整个支护面,推导出能够同时考虑开挖过程、支撑设置以及桩-土-圈梁共同作用的支护面位移和受力方程组,利用FORTRAN语言编制的程序求解,可计算出开挖至坑底工况下圈梁、桩身任一截面的内力、水平位移。通过算例计算圈梁(桩顶)的位移与监测位移及部分桩的内力,与文献[1]方法计算的内力进行对比分析,验证文中方法的合理与可行性。
Select a pile on a support surface as the research object, set up a support (or anchor or anchor) and excavation to the bottom of the pit, the establishment of its stress balance equation and displacement coordination equation. Through the coordinating action of the ring and beam, the research object is extended to the whole supporting surface, and the displacement and stress equations of the supporting surface can be derived which can simultaneously consider the excavation process, the support set and the pile-soil-ring beam interaction. Using FORTRAN Language programming procedures to solve, can be calculated under the excavation to the bottom of the ring beam beam, pile any section of the internal force, horizontal displacement. The displacement and monitoring displacements of the ring beam (pile top) and the internal forces of some piles are calculated by examples, and the internal forces calculated by [1] are contrasted and analyzed to verify the rationality and feasibility of the method.