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)开发大规模数值模拟能力，能够准确捕捉全尺寸施工过程中下料管混凝土的整体性能，并在工业实践中遇到最广泛的混凝土混合物。这将与奥雅纳的数字团队一起完成，以在两个方向上转移技能。3）系统地调查混凝土性能，设计因素，施工过程和完工质量之间的关系，其中特别关注钢筋设计的影响和混凝土混合物的可变性。4)建立建模能力，以识别混凝土混合物和界面层中的各种单独成分（例如水泥、水、骨料、外加剂、添加剂和碎片）及其多物理相互作用。重要的是要量化之间的关系，精细尺度的物理和形成的缺陷，如偏析，阴影，矩阵，出血，沟道等深基础。

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.