基于地基热固结的能源桩筏纠偏工作机理研究

能源桩在我国经济发达的沿海沿江城市群有着广泛的工程应用空间。沿海沿江地区多为软土地质，而软土地基中能源桩在循环温度荷载作用下的长期沉降累积和稳定性涉及复杂的多场耦合机制。因此能源桩的正常使用极限状态评估，一直是工程界和学术界为之努力的重要目标。另一方面，随着城市建设的发展，密集的房屋建筑和基础设施使得地基不均匀沉降的影响性显著提升，建筑倾斜的预防和治理显得尤为重要。本项目拟从地基土在温度荷载作用下的沉降特性入手，将新型的能源桩与建筑纠偏结合起来，发展出集基础力学功能、传热功能与纠偏功能于一体的新型能源桩筏结构。项目将综合采用现场试验、离心机试验、小尺度模型试验和数值模拟等多种研究手段，就考虑热塑效应的地基-基础-结构相互作用问题进行探索和深入研究。

Energy piles possess wide engineering opportunities in China’s developed coastal and riparian urban agglomerations. The ground condition of these areas is usually soft clays, in which the energy piles, under cyclic thermal loads, may undergo long-term accumulated settlements and stability problems, which involves complex multi-field geotechnical mechanisms. Therefore, the assessment of the serviceability limit state of energy piles has always been an important goal for geotechnical engineers and researchers. On the other hand, with the development of urban construction, the impact of differential settlement of foundations has been significantly increased due to the construction of buildings and infrastructures and the prevention and treatment of building tilting are particularly important. This project intends to start from the settlement characteristics of the foundation soil under thermal load, combine novel energy piles and building inclination rectification together, and develop a new energy pile raft structure that combines basic mechanical functions, heat transfer functions and inclination rectification functions. The project will comprehensively use a variety of research methods such as is situ tests, centrifuge tests, small-scale model tests and numerical simulations for exploration and in-depth research of thermal soil-foundation-structure interactions.