【摘要】 CFG桩复合地基具有提高承载力、减小变形和成本低等优势，在地基处理中得到广泛应用。然而，实际工程案例表明，现行规范中常用的沉降计算方法与实测值存在较大差距，其中一个主要原因是对附加应力场分布规律了解不足。结合北京海淀某住宅项目案例，现场进行单桩复合地基静载荷试验，进一步使用Midas GTS/NX有限元软件对CFG桩复合地基进行建模分析，得到了复合地基整体附加应力场的分布规律，并研究了桩径、褥垫层厚度与附加应力场的变化规律。这些结果对于理解CFG桩复合地基受力机理并指导设计具有重要意义。更多还原

【Abstract】 The CFG pile composite foundation is widely applied in the field of foundation treatment due to its numerous advantages, including enhanced bearing capacity, reduced deformation, and cost-effectiveness. However, practical engineering cases have revealed significant discrepancies between the calculated values using commonly used settlement calculation methods for CFG pile composite foundations as per existing regulations and the measured values. One of the key reasons for this discrepancy lies in insufficient understanding of the distribution pattern of additional stress fields. Combined with a case study of a residential project in Haidian, Beijing, the static load test of single pile composite foundation was carried out on site, and further modeling and analysis of CFG pile composite foundation was carried out by using Midas GTS/NX finite element software. Furthermore, variations in pile diameter, mattress bedding thickness, and their impact on the additional stress field were investigated. The findings provide valuable insights into both the mechanical behavior and design considerations for CFG pile composite foundations.更多还原