超软土的工程性质分析

吹填淤泥质土和黏性土围海造陆过程中,水力分选、漂流导致出水口附近区域形成含水率高、塑性指数高、压缩性大和强度低的淤泥和流泥等超软土,真空预压加固后的强度难以达到理想的加固效果。为了能有效地对超软土进行加固,在较广泛收集我国沿海地区超软土加固前后物理力学指标的基础上,结合多项室内试验结果,对超软土的工程特性进行了较为系统的分析研究。此外,还分析了超软土的固化试验、真空联合电渗试验等结果。结果表明加固后的超软土地基承载力可以达到堆场使用要求。

Analysis on Engineering Property of Ultra Soft Soil

During dredging and filling,the ultra soft clay is piled near the water outlet because of the hydraulic sorting and drifting.The ground by ultra soft form is hard to improve by vacuum preloading method for having the properties of high rate of water ratio,high plasticity index,high compressibility and low strength.For the purpose of effective improvement ultra soft soil ground,it is necessary to understand the property of ultra soft soil.In this paper,the engineering properties of ultra soft soil are analyzed in detail by collecting the related data and analyzing the results of laboratory experiment.For many improvement projects on coastal region,the engineering properties of ultra soft soil before and after improving are researched.And then,the cement mixing method and vacuum preloading combined with electro-osmosis method are advanced to improve the ultra soft soil ground.From the results,it is shown the bearing capacity of the improvement ultra soft soil ground is increased and the ground is used to be stock dump etc.