复合地基沉降发展规律研究

项目名称： 复合地基沉降发展规律研究

项目编号： No.51278450

项目类型： 面上项目

立项/批准年度： 2013

项目学科： 建筑科学

项目作者： 龚晓南

作者单位： 浙江大学

项目金额： 80万元

中文摘要： 随着我国土木工程建设的发展，复合地基在建筑工程、市政工程、交通工程和铁道工程中得到了广泛应用。但由于复合地基沉降发展规律，特别是复合地基的工后沉降计算理论还很不成熟，理论计算值和实测结果差距较大，这影响了复合地基应用的进一步发展。本课题通过室内外试验、理论分析和数值分析，并结合工程案例反分析，考虑桩间土体排水固结与桩土应力比发生改变之间的耦合作用、作用在复合地基上的上部结构的刚度和复合地基加固区下卧可压缩性土层特性等因素对复合地基沉降发展的影响，揭示复合地基沉降随时间的发展规律，提出各类复合地基沉降及工后沉降计算方法，发展变形控制的复合地基设计计算方法，为工程建设服务。开展复合地基沉降发展规律研究，既具有重要的理论意义，又具有较大的工程实用价值。

中文关键词： 粘结材料桩复合地基；散体材料桩复合地基；沉降发展规律；固结特性；有限元分析

英文摘要： With the development of China's civil engineering construction, composite foundation has been widely used in constructional engineering, municipal engineering, traffic engineering and railway engineering. However, our understanding in the settlement development law for composite foundation is insufficient, especially the calculation theory of post-construction settlement is still immature, which results in the big gap between the calculation results and the actual ones and affects the further development of the application of composite foundation. By means of field test, laboratory physical model test, theoretical analysis, numerical analysis and also back-analysis of engineering cases, this project intends to reveal the settlement development law of composite foundation with time, propose the calculation methods of settlements and post-construction settlements, develop the design approach for various composite foundation based on deformation control and eventually serve for constructions. The project accounts for the influence of the coupling effect of the consolidation of the soil between piles and the change of the pile-soil stress ratio, the superstructure rigidity and the properties of the underlying soil on the settlement development for composite foundation. The research on the settlement development for

英文关键词： composite foundation with adhesive columns；granular column composite foundation；settlement development；consolidation characteristic；finite element analysis