Deep Foundation Technologies for Infrastructure Development

加拿大目前面临着应对基础设施老化的巨大挑战，我国60%的公共基础设施已有40年以上的历史。这一关键基础设施得到具有相当大经济价值的不同类型基金会的支持。因此，迫切需要新的高效基础技术来支持新的基础设施，并升级和延长现有基础设施的寿命。拟议研究的主要目标是开发新的深基础系统和产品，将对环境的影响降至最低，并为建筑公司、该基础设施的所有者和运营商节省资金。这项研究计划将调查各种基础设施项目在各种环境和人为负载下的创新基础的表现。它将涉及被调查的基础系统的实地和实验测量，这将证明拟议的创新基础和产品的可行性和优越性能。此外，实验测量和观测将用于校准/验证分析和数值模型，这些模型可用于设计和评估被检查的基础技术的性能特征。拟议的研究计划包括三个研究方向，调查三种不同类型的基础设施的基础系统。这些研究方向涉及施工、分析和设计问题，包括不同的荷载条件、施工工艺和材料以及不同基础体系的响应特性。*1.公路基础设施的大容量深基础*公路桥梁的基础承受着较大的重力、交通和环境荷载，这就要求采用承载能力较大的基础体系。为此目的，将研究两种创新的桩基础解决方案，它们以较低的成本提供大容量。*2.电信和电力传输塔的基础*电信/传输塔和风力涡轮机通常建造在偏远和困难的地点，并对其基础施加具有高侧向力和弯矩特征的复杂荷载条件。将研究两项创新技术，以增强此类应用的微桩基础的横向和抗弯能力。*3.振动设备基础*石油管道、发电/石化厂需要能够快速安装和加载并能够承受动态加载的基础。将考察两个高效基础系统的动态响应，这两个系统在远程和受限访问站点提供了快速安装和易于安装的优势。**

Canada is currently facing enormous challenges dealing with the aging of infrastructures, with 60% of our public infrastructure is more than 40 years old. This critical infrastructure is supported by different types of foundations that are of considerable economic value. Hence, there is an urgent need for novel efficient foundation technologies to support new infrastructure and to upgrade and extend the life of existing infrastructure. The main objective of the proposed research is to develop novel deep foundation systems and products that will minimize environmental impact and will save money for construction companies, and owners and operators of this infrastructure. This research program will investigate the performance of innovative foundations for a variety of infrastructure projects subjected to a variety of environmental and man-made loadings. It will involve field and experimental measurements of investigated foundation systems, which will demonstrate the feasibility and superior performance of the proposed innovative foundations and products. In addition, the experimental measurements and observations will be used in calibrating/verifying analytical and numerical models that can be used for the design and evaluation of the performance characteristics of the examined foundation technologies.The proposed research program comprises three research directions that investigate foundation systems for three different types of infrastructure. These research directions deal with construction, analysis and design issues, including different loading conditions, construction techniques and materials, and response characteristics of different foundation systems.***1. Large capacity deep foundations for highway infrastructure***Foundations for highway bridges are subjected to heavy gravitational, traffic and environmental loads, which necessitates utilizing foundation systems that have large load carrying capacity. Two innovative pile foundation solutions that provide large capacity at a reduced cost will be examined for this purpose.***2. Foundations for telecommunication and power transmission towers***Telecommunication/transmission towers and wind turbines are often constructed in remote and difficult access sites, and impose complex loading conditions on their foundations characterized by high lateral forces and bending moments.  Two innovative technologies will be investigated to enhance the lateral and bending resistances of micropiles foundation for such applications.***3. Foundations for vibrating equipment***Oil pipelines, power generation/petrochemical plants require foundations that can be installed and loaded quickly and can withstand dynamic loading. The dynamic response of two efficient foundation systems that offer advantages with regard to fast installation and ease of installation in remote and limited access sites will be examined.**