毛细水作用对粉土路基稳定性的影响

The influence of capillary water action on the embankment stability of a silt embankment

为了探索毛细水对粉土路基稳定性的影响,通过实验研究了粉土毛细水作用高度与含水量、含水量与回弹模量的关系,进而拟合了毛细水作用高度与压实粉土回弹模量的关系式。实验研究了含水量与压实粉土抗剪强度的关系,研究表明毛细水对粉土路基的刚度和抗剪强度的衰减影响显著。应用Abaqus 6.10有限元分析软件模拟计算不同水位下毛细水对粉土路基稳定性的影响,采用强度折减法计算不同水位粉土路基在标准轴载作用下的安全系数,得到毛细水作用高度与粉土路基稳定性的规律,为粉土路基的设计与施工提供了依据。

The influence of capillary water action on the embankment stability of a silt embankment was studied.Based on experiment,the relationships between the height of capillary action and water content,the water content and modular of silt,the water content and shear strength were obtained,and then the equation about the height of capillary action and the modular of silt was fitted.The test results indicated that capillary water had great influence on stiffness and strength of the silt embankment.The finite element method software,Abaqus,was applied to simulate the influence of capillary water action on the silt embankment stability.The strength reduction method was adopted to calculate the safety factors for the silt embankment with deferent water level under standard loads.The discipline about the height of capillary action and the silt embankment stability was obtained.The foundation could provide the basis for the design and construction of silt embankments.