基于蠕变模型的边坡抗滑桩体系变形时效规律数值研究

通过有限元数值软件ABAQUS建立了理想边坡-抗滑桩体系三维数值模型,采用摩尔库伦模型和Drucker-Prager与Singh-Mitchell弹塑蠕变耦合模型对其进行数值计算,具体包括边坡-抗滑桩体系的塑性区、位移、桩身应力应变、桩土接触关系、桩土相互作用的时效规律,并对加桩前后的变形时效规律做对比分析.结果表明:...

Numerical Simulation on Deformation Regular of Landslide-pile System Based on Rheological Properties

In this paper,a three-dimensional numerical model of the ideal slope-anti-slide pile system is established through the finite element numerical software ABAQUS,and the Mohr Coulomb model and the Drucker-Prager and Singh-Mitchell elastic-plastic creep coupling model are used for numerical calculations,including slope-anti-slide pile system’s plastic zone,displacement,pile body stress and strain,pile-soil contact relationship,pile-soil interaction time effect law,and comparative analysis of the time effect law of deformation before and after adding piles.The results show that the creep effect significantly increases the deformation of the slope anti-slide pile system.Plastic deformation first appears at the foot of the slope and gradually develops towards the shoulder of the slope over time.The slope displacement is mainly concentrated in the slope position,and the maximum slope displacement decreases gradually toward the deep part of the soil.The anti-slide pile has a good effect on controlling creep deformation.It not only significantly reduces the horizontal deformation value of the soil behind the pile,but also reduces the depth of influence of the soil behind the pile.The soil in front of the anti-slide pile still produces downward instability sliding deformation,this part of the soil is separated from the pile,and the soil behind the pile slides around the pile.The creep deformation causes the earth pressure on the anti-slide pile to be more complicated than the passive earth pressure before the pile and the active earth pressure behind the pile assumed in the conventional analysis.