静动力排水固结法处理吹填海相泥沙软基试验研究

Treatment of hydraulic fill marine soft soil ground using static and dynamic drainage consolidation method

为加固吹填海相泥沙形成的软土地基,在汕头市东海岸围海造地的吹填区域内,进行堆载预压的静态排水固结法、强夯施工的动力排水固结法等试验,采用“降水+堆载+强夯”的静动力排水固结法加固吹填海相泥沙形成的软土地基。通过现场测试,研究施工过程中各层地基沉降、水位和孔隙水压力、土体位移变化情况,对处理前后的地基进行土工试验和原位测试研究,并验证该方法对海相泥沙的处理效果。研究表明,静动力排水固结法显著提高吹填软土地基的承载特性,可广泛应用于围海造地软基加固工程中。

To reinforce the soft soil foundation formed by dredged and filled marine sediment,experiments such as static drainage consolidation methods with surcharge preloading,and dynamic drainage consolidation methods with dynamic compaction construction are conducted in the backfill area of the coastal reclamation in Shantou City.The static-dynamic drainage consolidation method of“dewatering+surcharge loading+dynamic compaction”is used to reinforce soft soil foundation formed by marine silt and sand backfill.Through field tests,the settlement of various foundation layers,water level and pore water pressure,and soil displacement changes during construction are studied.Geotechnical tests and in-situ tests are conducted on the foundation before and after treatment,verifying the treatment effect of this method on marine silt and sand.The research shows that this static-dynamic drainage consolidation method can significantly improve the bearing capacity characteristics of the backfilled soft soil foundation,and can be widely used in soft foundation reinforcement projects for land reclamation from the sea.