软土地基超长PHC管桩的荷载传递机理分析

Bearing Mechanism of Super-long PHC Pipe Piles in Soft Soil Foundation

软土地基中超长预应力混凝土管桩在桥梁和建筑工程中得到了广泛的应用,但超长预应力混凝土管桩的承载机理还不很清楚。土体采用非线性弹性Duncan-Chang模型,桩土界面采用Goodman接触面单元,桩体部分采用Hognestad方程对桩土的相互作用进行非线性有限元分析。结果表明:在有效荷载作用下,桩身变形在弹性范围内,桩底沉降是持力层的压缩变形。

Prestressed high strength concrete （PHC） pipe bridge and construction structures in soft soil foundation, but the piles are widely used to construct foundation for beating mechanism of super long prestressed con- crete pipe is not clear. The nonlinear finite element analysis of the pile - soil interaction Duncan-Chang model for soil, Goodman element for the contact and Hognestad equation is for discussed by using the the pile. Results show that the strain of pile is elastic, and the settlement of oile tio is the comoression of the soil at the oile tio.