【摘要】 假定管桩在沉桩时的挤土过程是一个圆柱形孔扩张过程。基于具有抛物线型强度包络线和圆孔扩张理论对管桩的挤土效应进行分析研究。分析了桩周土体周围土体的弹塑性力学行为,得到应力场和位移场等的表达式,并求得其塑性区半径、孔内最终压力。其结果可以为管桩工程问题提供理论依据。更多还原

【Abstract】 Based on the hypothesis that the pile driving process is regarded as cavity expansion,according to two-parameter parabolic failure envelope and the cavity expansion theory,the driving effect of the tubular pile is studied.The elasto-plastic analysis solution of the stress field and displacement field of the soil around the pile are given.The radius of plastic zone and the limit expansion pressure are obtained.It can provide theoretical supports for some tubular pile engineering practices.更多还原