摘要
振动沉模现浇混凝土薄壁管桩(简称PCC桩)技术是河海大学自主开发研制的用于地基加固处理的新技术,它是一种适合于软土地区的新型高效优质桩型。通过有限元方法研究了PCC桩的荷载传递机理,考虑了桩土接触面的滑移、脱开和土的非线性。分析结果表明,荷载-沉降曲线数值模拟结果与现场试验相当接近,并揭示了内外侧摩阻力的分布、端阻力的发挥、土塞的作用等一些目前无法由现场试验得到的结果。
Field pour concrete cased pile with vibrated and steel tube mould technology is a new ground improvement technology developed independently by Hohai University. This new pile style is suitable for soft areas. Load transfer is studied by means of an axisymmetric finite element elastoplastic model that includes interface elements for representing slippage, pile-soil separation and soil nonlinear behavior. Numerical results indicate that good agreement exists between the finite element prediction and the field test for the head load-settlement curve. Inner frictional resistance, outer shear stress, end bearing and effects of soil plug those can not be investigated by field test are also studied.
出处
《岩土力学》
EI
CAS
CSCD
北大核心
2004年第5期764-768,共5页
Rock and Soil Mechanics
关键词
薄壁管桩
土塞
荷载传递
有限元法
Elastoplasticity
Finite element method
Loads (forces)
Mathematical models
Shear stress
Wear resistance
