柔性荷载下带帽CFG桩复合地基承载性状的试验研究  

Experimental study on bearing behaviors of composite foundation with CFG piles with caps under flexible loads

作　　者：黄生根[1] 

机构地区：[1]中国地质大学工程学院(武汉),湖北武汉430074

出　　处：《岩土工程学报》2013年第S2期564-568,共5页Chinese Journal of Geotechnical Engineering

摘　　要：根据现场试验结果,研究了承受柔性荷载的带桩帽CFG桩复合地基中桩的承载特性、土的受力特性以及桩帽、桩和土之间相互作用规律。试验结果表明:极限状态下,带桩帽的CFG桩复合地基中桩承载力的发挥程度比地基土承载力的发挥程度略大;正常使用状态下,桩承载力的发挥程度远大于土承载力的发挥程度,桩的安全储备小于土的安全储备。According to field test results, the interaction characteristics of cap-pile-soil and the bearing behaviors of piles and soils of the composite foundation with CFG piles with caps under flexible loads are analyzed. The following conclusions are drawn:(1) in the ultimate state, the exertion degree of bearing capacity of CFG piles with caps of the composite foundation is greater than that of the soils;(2) in the normal service condition, the exertion degree of bearing capacity of CFG piles is much larger than that of the soils;(3) the safety margin of piles is less than that of the soils.

关 键 词：柔性荷载 桩帽 CFG桩复合地基 承载性能 

分 类 号：TU470[建筑科学—结构工程]