柳州银都大厦桩基有限元分析

Analysis of FEM for Pile Foundation of Yingdu Tall Building at Liuzhou

柳州银都大厦核心筒桩基础因场地岩溶发育极强，桩长差异极大，使长短桩应力与变形发生差异，为保证基础工程安全可靠，对桩基进行了三维有限元分析。计算结果说明，个别短桩的应力已超过混凝土的抗压强度，如对短桩进行的期脱空、后期加载并考虑其他有利因素，则桩的应力差异可趋于平缓。

Yingdu World of Liuzhou adopts pile fating of tube at the core. There are so mang karsts at the site that the length of tubes are greatlty dissmilary. Thus , difference of stress and strain occurs between Long piles and short piles. To ensure the safety of foundation engineering , We have used Finited Elemeitl Method of three - dimension to analyse it. The result of caculation shows that the stress of individual short piles have exceeded the compressive strength of concrete. Let the short piles be free of compression at the earlier stage and load them at the later stage , Considing otlur favorable factor at the same time ,the stress of piles wonlel be reaching placid.