高含水率疏浚淤泥排水板滤膜淤堵机理

Clogging mechanism of PVD filter membrane used for reinforcing dredged clay

真空预压加固高含水率疏浚淤泥通常存在排水板滤膜的淤堵问题。通过开展4种排水板滤膜的物理力学性能测试,以及环境扫描电子显微镜观测滤膜的孔洞结构规则,对比分析滤膜淤堵试验中梯度比大小规律的本质因素。总结提出滤膜的淤堵机理,并建立防淤堵准则。

Filter membrane clogging problem of prefabricated vertical drains （PVD） usually presents in dredged clays by vacuum preloading. For four kinds of drainage plate membrane, the physical and mechanical tests were carried out. The environmental scanning electron microscope used to observe membrane pore structure rules. The essential factors of gradient ratio were comparative analyzed by filter clogging test. The filter membrane clogging mechanism was proposed in summary, and the anti-clogging criterion was established. It should be reference for future engineering.