多桩型复合地基承载特性的试验研究  

Testing study on bearing characteristics of multi-type-pile composite foundation

作　　者：王士杰[1] 何满潮[1] 李凤琴[2] 奚进泉 

机构地区：[1]中国矿业大学岩土工程研究所,北京100083 [2]河北农业大学,河北保定071001 [3]中石化集团勘察设计院,河北保定071000

出　　处：《铁道科学与工程学报》2006年第5期64-69,共6页Journal of Railway Science and Engineering

基　　金：河北省建设厅科研基金资助项目(2005-134)

摘　　要：将碎石桩与CFG桩组成的多桩型复合地基用于沿海软土地基的处理,探讨了其加固机理。通过现场实测,对这种新型复合地基的桩土应力随荷载的变化过程、桩土共同作用机理及桩土荷载分担比的变化过程进行分析。结果表明,处理后的复合地基承载力特征值比原天然地基承载力提高了5.7倍。Application of the multi - type - pile composite foundation in coastal soft soil areas was studied and the mechanism of such reinforcement method was also analyzed briefly. Based on in - situ stress measurements, the stress development in the piles and nearby soil was analyzed. Meanwhile, the mechanism of piles - soil interaction and the beating ratios in piles and soil were researched. The result shows that the treated characterized value of composite foundation is 5.7 times larger than that of untrated composite foundation.

关 键 词：多桩型复合地基 加固机理 桩土应力比 桩土荷载分担比 

分 类 号：TU472[建筑科学—结构工程]