含水率变化环境下桩土界面摩擦性能研究

Research on Friction Property of Pile-soil Interface under Moisture Content Change Environment

湖区水位升降将使周边土体处于周期性含水率变化环境下,对处于此种工况下的摩擦桩而言,桩土界面摩擦系数亦将随之改变。以某湖区高速公路软基路段桩基加固工程为研究对象,采用现场调研、室内外试验、理论分析等方法,展开含水率变化环境下桩土界面摩擦性能研究,针对试验土样得到了桩土界面摩擦系数、粘聚力及摩擦角随含水率改变的变化规律,可为同类工程提供一定参考。

The water level fluctuation of lake area will make the surrounding soil mass be under the environment of periodic moisture content change. For the friction pile under such environment, the friction coefficient of pile-soil interface will be changed therewith. Taking the pile foundation reinforcement project of expressway soft roadbed in a lake area as an example, and by the methods of field survey, indoor and outdoor experiments, and theoretical analysis, the article studies the friction property of pile-soil interface under the environment of moisture content change. The results of experimented soil samples show the change rules of friction coefficient, cohesion and friction angle of pile-soil interface with the changing of moisture content,which can be referred for the similar projects.