强夯+强夯置换法处理淤泥质土及上覆厚层填土试验研究

Experimental Research on Silt Soil and Overlying Thick Fill by Dynamic Consolidation + Dynamic Replacement

结合某国际机场二期扩建工程货运区地基处理工程,探讨了地基处理设计方案,选取了大面积地基处理前有代表性的区域作为地基处理试验段。通过夯沉量观测、地表平均沉降量观测、标准贯入试验、重型动力触探试验、载荷试验、最大干密度及进干行密分度区试处验理,、室夯内击土能2工5试00验、4、0工00后k沉N·降m观的测有等效手加段固,深分度析可了分强别夯+按强4、夯7置m采换用法的,置加换固墩效体果的,填建议料强应考夯虑法应其按压地缩及层骨分布料及在处挤理密厚过度程的横向扩径,并通过试验确定增强体最佳填料方量。

Based on the ground treatment of a international airport extension project, the design is discussed by ground treatment, the typical area is chosen as the ground treatment test section before large area ground treatment. Through the data analysis of tamping settlement monitoring, surface settlement monitoring, standard penetration test, heavy dynamic probe test and plate loading test, maximum dry density test,dry density test,laboratory soil test,post-construction settlement monitoring,reinforcement effect by dynamic consolidation +dynamic replacement are analyzed. It is suggested that the dynamic consolidation should be divided by different soils and treatment depth,and the effective improvement depth with energy of 2500 and 4000 kN·m can be used as 4 and 7 m respectively. The compression and horizontal expansion of aggregate during compaction should be considered in the filler of replacement pile, and the best filler volume of replacement pile is determined by experiments.