组合桩复合地基试验研究

组合桩是由搅拌桩和钢筋混凝土芯桩组合而成的新型桩,为掌握组合桩和组合桩复合地基承载力的特性,进行了六根桩的荷载试验.研究表明,芯桩对组合桩复合地基的荷载传递起着关键作用,提高了组合桩的承载力;组合桩复合地基的承载力高于水泥搅拌桩;水泥土的固化效应、芯桩的挤土效应和芯桩的荷载传递是组合桩复合地基高承载力的主要来源.并结合工程应用,提供了组合桩的设计方法和质量控制措施.

Test of Composite Foundation with Composite Pile

A composite pile is a new pile which is made of a cement mixing pile and a reinforced concrete core pile(RCCP).To know well the bearing capacity of composite foundation,the six of composite piles were tested.The following results were obtained.The RCCP plays a critical role in the load transfer of composite piles in the high bearing capacity;the bearing capacity of composite piles is higher than that of the cement mixing piles;the main sources of high capacity are due to the solidification effect of the cement soil,the pressing soil effect of the RCCP and the load transfer of the RCCP engineering applications,the design and quality control methods are provided in the paper.