Numerical modelling of Concrete Rheology in Deep Foundation Construction

项目目标包括：1)与EFFC/DFI现场测试互动。2)发展大规模数值模拟的能力，能够准确地捕捉到混凝土在全尺寸施工过程中的体积行为，以及在工业实践中遇到的最广泛的混凝土混合料。3)系统地研究混凝土性能、设计因素、施工过程和竣工质量之间的关系，其中特别关注钢筋设计的影响和混凝土配合比的变化。4)建立模型能力，以识别混凝土混合料和界面层(例如水泥、水、集料、外加剂、外加剂和碎屑)中的各种单独成分及其多物理相互作用。定量研究细尺度物理与深基础中的离析、遮挡、母化、渗漏、沟槽等缺陷的形成之间的关系是十分重要的。

The project objectives include:1) Interact with EFFC/DFI field tests. 2) To develop capacity for large-scale numerical simulation that is able to accurately capture the bulk behaviour of tremie concrete in full-scale construction processes and for the broadest range of concrete mixes encountered in industrial practice. This will be done in conjunction with Arup's numerical teams to transfer skills in both directions.3) To systematically investigate the relationship between concrete properties, design factors, construction processes and completion quality, where a special focus is to be placed on the impact of reinforcement design and the variability of concrete mixes. 4) To build a modelling capacity that recognizes the various individual components in concrete mix and the interface layer (e.g. cement, water, aggregate, admixture, addition and debris) and their multi-physics interactions. It is important to quantify the relationship between fine-scale physics and the formation of such defects as segregation, shadowing, matrixing, bleed, channelling etc in deep foundations.