报告人简介

邓丽军博士是加拿大阿尔伯塔大学岩土工程系副教授。他于2012年在加州大学戴维斯分校获得博士学位，并于2013年加入阿尔伯塔大学任教。他的研究方向包括地基工程、地震工程、寒区岩土工程、岩土模拟等。他获得并完成了许多由加拿大国家研究理事会和企业资助的研究项目，其中一个由外部支持的研究项目是基于足尺试验、离心机建模、实验室调查和数值模拟的综合研究。他指导过18名博士生和硕士生，发表过约50篇期刊论文。他目前担任加拿大岩土工程学会土力学和地基分会主席以及《Canadian Geotechnical Journal》副主编。

报告简介

The Canadian Arctic is crucial to the national security and economics of Canada. Climate change has posed a substantial risk to arctic communities, infrastructure and foundations in the Canadian Arctic. Yet climate change also stipulates practice and research on new foundation types. In northern Canada which is largely covered by continuous permafrost, conventional pile foundations are expensive and limited by the construction window. This presentation will begin with an overview of pile foundations used in northern Canada and their design principle, and then cover the research on an innovative screw pile foundation that may be suitable for northern Canada. The screw pile can be directly installed by torque into permafrost, as compared with conventional piles installed by drilling method. Experiment of full-size pile segments was carried out using the cutting-edge cold regions facilities at University of Alberta. The objective was to examine the engineering behavior of the pile type and provide a guide to the design of this pile type. The short-term adfreeze strength of test piles, long-term stability, and installation method will be presented and the mechanisms of the adfreeze failure will be discussed.