摘要
考虑了桩土的相互作用,利用太沙基固结理论建立了桩侧表面负摩阻力非线性解析模型,在此基础上分析了软土地区桩侧表面负摩阻力的影响因素.结果表明,桩体特性、土体特性、桩土界面强度、堆载及土体结构性等对桩基负摩阻力均有不同程度的影响.为类似地层条件下桩基础承载力的设计提供有益参考.
Based on the pile-soil interaction and Terzaghi consolidation theory, a nonlinear analytical model for negative skin friction of piles in soft soil was developed. An engineering example was calculated using this model, The fundamental load transfer properties and the relationships between negative skin friction and its main influence factors were analyzed. The results show that increasing the length, diameter, elastic modulus of piles and surcharge would enhance the downdrag of piles; while increasing the compress modulus of soils around piles, cutting down the mechanical strength of pile-soil interface or destroying structural strength of soils would reduce the downdrag of piles. The above results could help to design the capacity of piles in the similar areas.
出处
《上海交通大学学报》
EI
CAS
CSCD
北大核心
2005年第5期731-735,741,共6页
Journal of Shanghai Jiaotong University
基金
上海市重大科技攻关项目(04DZ12035)
关键词
软土地基
负摩阻力
下拉荷载
桩土相互作用
解析模型
soft soil
negative skin friction
downdrag
pile-soil interaction
analytical model
