【摘要】 以某工程为对象，考虑不同开挖阶段和施工条件下各结构构件内力和位移的变化，对施工阶段进行全过程计算分析。通过不同开挖状态的工况对比，总结了主要结构构件的内力和变形随施工进展的变化规律。提出了在结构竖向承载力的基础上考虑了周围土体沉降、桩柱差异沉降和水平支撑体系等综合因素影响的临界高度自适应分析方法。研究了本项目中制约上部建设临界高度的主要因素，并结合实际工程案例计算出临界高度的范围，从而提出了安全性建议。更多还原

【Abstract】 In this paper, the whole process of construction for a project is calculated and analyzed, considering the change of internal force and displacement of each structural member under different excavation stages and construction condition. Through the comparison of different excavation conditions, the change law of internal force and deformation of main structural parts with the progress of construction is summarized.Based on the vertical bearing capacity of the structure, an adaptive analysis method of the critical height is proposed, which takes into account of the influence from the surrounding soil settlement, differential settlement of pile-column and horizontal support system. The main factors restricting the critical height of the upper construction in this project are studied, and the range of the critical height is calculated, and the safety suggestions are given.更多还原