(东南大学岩土工程研究所，南京 210096)
［摘要］软土地区多高层建筑在竣工后沉降长期缓慢发展，严重的将影响建筑物的正常使用甚至造成破坏。通常加固区的沉降在施工过程中基本完成，长期发展的沉降主要是桩基础软弱下卧层固结造成的。将桩基的承载体系进行简化，利用修正的荷载传递法计算加固区沉降，并将桩端荷载作为下卧层的附加应力，通过求解固结方程计算下卧层沉降，将两者所计算的沉降迭加作为高层建筑桩基础沉降，使其能反映沉降的长期发展趋势，并利用工程实例对计算方法的准确性进行了验证。
［关键词］多高层建筑；加固区沉降；下卧层沉降；长期沉降；修正荷载传递法
A simplified foundation loading system to study post-construction settlement of multi-storey buildings
Wang Fei, Miao Linchang(Institute of Geotechnical Engineering of Southeast University, Nanjing 210096, China)
Abstract:The post-construction settlement of multi-storey buildings on soft soil increases as time，more serious situations can effect the stability of buildings, even cause damage. The long-term developing settlement is mainly induced by the consolidation of the sublayer. This paper presents a method that the summation of reinforcement area settlement and sublayer settlement is recognized as the total foundation settlement. The deformation of reinforced zone is analyzed using improved load transmission method. The load at the pile tip is taken as the additional stress of sublayer and the settlement of sublayer is calculated by solving the consolidation equation. The proposed method can reflect the long-term tendency of deformation development. The results of two cases show that the method is effective for long term settlement prediction.
Keywords:multi-storey building; reinforcement area settlement; sublayer settlement; long-term settlement; improved load transmitssion method
国家自然科学基金项目(50478072)。
作者简介：王非，博士研究生，Email:wangfei-1982828@163.com。
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