基于透明黏土的电渗法加固软基模型试验

Study on soft ground reinforcement by electro-osmotic method based on transparent clay

电渗法是目前国内外软土地基加固的常用方法之一,然而,电渗法加固软基过程中土体内部的位移场等加固机理尚不明确。基于透明黏土材料和PIV技术,开展电渗法加固软基透明土模型试验研究,可视化观测电渗过程中土体内部的电阻、位移场、以及排水量等的变化规律,揭示软弱土地基电渗加固机理。研究结果表明:利用透明黏土材料和PIV技术研究电渗法加固软基的方法是可行且可靠的。本文试验条件下,电压梯度每增大0.2 V/cm,电流峰值平均增大35%,排水速率峰值平均增大30%。

Electro-osmosis method is one of the widely used methods for soft ground treatment in the world.However,the reinforcement mechanism is still unclear,such as the displacement field inside the soil during the process of reinforcing the soft foundation.Using transparent clay materials and PIV technology,the model test of reinforcing the soft foundation by electro-osmosis method was carried out.The internal resistance,displacement field and water discharge of the soil were observed visually,and this revealed the reinforcement mechanism of soft ground treatment using electro-osmosis method.The results showed the feasibility and reliability of electroosmosis method.In the experimental conditions of this paper,the peak value of current increases about 35%and the peak value of drainage rate increases about 30%under every 0.2 V/cm increase of the voltage gradient.