预压固结法加固地基机理的模拟实验研究

Simulation experiment on the mechanism of preloading consolidation method to reinforce foundation

真空预压、堆载预压和降水预压是加固饱和软土地基的常用方法。研制了一套模拟各种固结预压方法机理的模型实验装置,可以直观地观察各种预压法加固过程中孔隙水应力与地基土骨架应力的相互转换和传递过程,从而可以明确3种预压方法的加固机理。该装置还可以模拟这3种预压法联合作用的过程和效果,通过孔隙水应力与地基土骨架应力的转化过程,可以明确预压法联合作用的机理。

The vacuum preloading, stack preloading and precipitation preloading are the commonly used methods to reinforcesaturated soft soil foundation. We developed a set of test apparatus for simulating various consolidation preloading methods＇mechanism, which can intuitively observe the mutual conversion and transfer process of pore water and the foundation soilskeleton stress, consequently can clear the reinforced mechanism of three kinds of preloading method. The device also cansimulate the process and effects of the combined action of three preloading methods. Through the transformation of the porewater stress and the soil skeleton stress, we clearly defined the mechanism of the combined action of the preloading methods.