静压钢板桩贯入阻力试验与数值仿真

为了研究静压钢板桩在成层地层中的沉桩性状及沉桩可能性,运用有限元软件ABAQUS, 采用显示动力学中耦合的欧拉−拉格朗日(Coupled Eulerian-Lagrangian, CEL)方法, 对静压钢板桩连续贯入不同土层的过程进行了有限元建模分析, 获得了沉桩阻力随贯入深度变化的曲线。再结合工程实例, 探讨了剪胀角的变化对模拟结果的影响, 并对沉桩完成后的桩周土体应力分布云图进行了分析。最后将模拟结果与工程现场实测数据进行对比, 分析了模拟值和工程实测值之间的差异。模拟研究结果可对成层地层钢板桩沉桩的可能性进行预测,为静压钢板桩的施工提供指导。

Test and Numerical Analysis of Penetration Resistance of Static Pressure Steel Sheet Pile

In order to study the driving behavior and possibility of jacked steel sheet pile in layered stratum, the commercial finite element software ABAQUS is used to analyze the continuous penetration process of static pressure steel sheet pile into different soil layers by using the method of Coupled Eulerian-Lagrangian (CEL) analysis, and the curve of pile sinking resistance with penetration depth is obtained. Then combined with an engineering example, the influence of the change of dilatancy angle on the simulation results is discussed, and the cloud chart of soil stress distribution around the pile after pile driving is analyzed. Finally, the simulation results are compared with the field measured data of a project, and the differences between the simulated values and the measured values are analyzed. The simulation results can predict the possibility of driving steel sheet pile in layered stratum and improve the construction possibility of static pressure steel sheet pile.