Analysis and Research on Critical Height for High-Rise Buildings Using Top-Down Construction Method
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.
foundation pit excavationtop-down methoddifferential settlementthe critical height of superstructure
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