沉降控制复合桩基的试验研究及适用范围探讨

Discussion on applicability and in-situ testing of controlled-settlement composite piled foundation

沉降控制复合桩基在上海软土地区得到了广泛的应用,但某住宅小区由于其地质条件的特殊性,不能满足上海市《 地基基础设计规范》(DGJ08-11-1999)中沉降控制复合桩基对桩端持力层的特定要求,超出了其适用范围,通过多组原位试验研究,探讨了沉降控制复合桩基在这种特殊地质条件下桩土共同作用的工作机理,分析了在这种地质条件下应用沉降控制复合桩基的可行性。

Controlled-settlement composite piled foundation has been widely used in Shanghai region. The soil just below the pile’s tip in a residential section is beyond that of controlled-settlement composite piled foundation that is stipulated in Shanghai Foundation Design Code (DGJ08-11-1999). The results of in-situ testing made in a residential section are introduced in this paper. The interaction between pile and soil and applicability of controlled-settlement composite piled foundation are discussed. The feasibility analysis of composite piled foundation in this residential section is given.