Centrifuge modeling of axial behaviour of helical piles

螺旋桩轴向行为的离心机建模

• 批准号: 485776-2015
• 负责人: Deng, Lijun
• 金额: $ 2.43万
• 依托单位: University of Alberta
• 依托单位国家: 加拿大
• 项目类别: Collaborative Research and Development Grants
• 财政年份: 2016
• 资助国家: 加拿大
• 起止时间: 2016-01-01 至 2017-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=600181
• 关键词: Centrifuge; modeling; axial; behaviour; helical

Helical pile foundations are widely used in the construction industry across Canada. A helical pile consists of a steel tubular shaft and one or more helices attached to the end of the shaft. Helical piles have many advantages such as large capacities, reusability, and rapid installation, compared to conventional straight-shaft piles; these advantages make helical piles especially suitable for the construction industry of Canada. In recent years, innovative helical pile types have been developed by pile manufacturers of Canada to meet the increasing demand of the industry. These piles often have large diameters and are subject to large static or cyclic loads. The design methodology of the piles has not been well established or validated by loading tests. In fact, it is nearly impossible to conduct in-situ loading tests for large-diameter piles due to the large pile capacities and the prohibitive cost of in-situ tests. Hence, a research program is necessitated for a comprehensive study of the in-situ performance of helical piles.

螺旋桩基础广泛应用于加拿大各地的建筑业。螺旋桩由钢管轴和连接到轴端部的一个或多个螺旋体组成。与传统直轴桩相比，螺旋桩具有承载力大、可重复使用、安装快速等优点；这些优点使螺旋桩特别适合加拿大的建筑业。近年来，加拿大的桩制造商开发了创新的螺旋桩类型，以满足行业不断增长的需求。这些桩通常具有较大的直径，并且承受较大的静态或循环载荷。桩的设计方法尚未得到很好的建立或通过加载试验进行验证。事实上，由于桩承载力大且现场试验成本高昂，对大直径桩进行现场加载试验几乎是不可能的。因此，有必要制定一个研究计划来全面研究螺旋桩的现场性能。