Study on Model Experiment of Sludge Treatment by Prefabricated Horizontal Drain Stepped Vacuum Preloading
In order to improve the sludge treatment effect,this paper proposed an prefabricated horizontal drain stepped vacuum preloading(PHD-SVP)considering the advantages of the prefabrica-ted horizontal drain vacuum preloading(PHD-VP)without bending and the stepped vacuum preloading(SVP)to reduce silting.The model experiments were conducted to explore the treatment effect of the prefabricated vertical drain vacuum preloading(PVD-VP),the PHD-VP and the PHD-SVP by anal-ysis of water discharge,drainage rate,water content,and vane shear strength,and the particle analysis was employed to observe the migration rule of soil particles surrounding drain.The experimental results showed that compared with the PVD-VP and the PHD-VP,the water discharge by the PHD-SVP was increased by 26.8％and 13.4％,the water content was reduced by 3.9％～4.8％and 1.1％～4.5％,and the vane shear strength was increased by 5.6％-8.3％and 1.8％～5.3％.Particle analysis showed that the PHD-SVP reduced the particle(0.001-0.010mm)content of the drain by 2.7％and 2.1％compared with the PVD-VP and the PHD-VP.
万方数据
维普
