【摘要】 水泥粉煤灰碎石（CFG）桩复合地基具有承载力高、沉降量小、经济性优、环保节能等优点，广泛应用于建筑、交通、水利等工程的软土地基处理中。为深入探究CFG桩复合地基的承载机理、沉降规律及影响因素，选取某水泥粉煤灰碎石桩作为研究对象，采用ANSYS有限元软件构建精细化数值模型，计算结果表明：在一定范围之内增加桩径，可有效提高复合地基承载能力。增加桩间距则桩体应力增加，桩周土体应力也随之增大，导致复合地基的承载力性能变差。更多还原

【Abstract】 Cement Fly-ash Gravel(CFG) pile composite foundation has the advantages of high bearing capacity, small settlement, excellent economic efficiency, environmental protection and energy saving, and is widely used in soft soil foundation treatment in construction, transportation, water conservancy and other engineering projects. To further investigate the bearing mechanism, settlement law and influencing factors of CFG pile composite foundation, a typical CFG pile was selected as the research object, and a refined numerical model was established using ANSYS finite element software. The calculation results show that increasing the pile diameter within a certain range can effectively improve the bearing capacity of the composite foundation. Increasing the pile spacing leads to higher stress in the pile body and correspondingly greater stress in the soil around the pile, resulting in degraded bearing performance of the composite foundation.更多还原