Application of Column Hammer Expansion Pile Technology in Miscellaneous Fill Subgrade Treatment
in severe environmental pollution.Due to the compressible,complex,and loose nature of miscellaneous filled soil layers highway construction has been significantly impacted as well.Rational utilization of this construction waste and enhancing the bearing capacity of the miscellaneous filled soil layers is a crucial task in current urban development and engineering construction.The deep miscellaneous filled soil layers in a roadbed section(K0+000-K0+650)was investigated based on a comprehensive engineering project in Yangcheng County,Shanxi Province.After conducting indoor experiments to determine soil properties,various road reinforcement solutions were compared.The results favored pile driver impact expansion pile technology,an innovation rooted in soil compaction and dynamic compaction techniques.The design and construction process of column hammer expansion pile method was further outlined.Finally,the efficacy of roadbed reinforcement was validated through both single-pile static load tests and composite foundation static load tests.The load-bearing capacity of roadbed reinforced by column hammer expansion pile technology was enhance,meeting the design requirements.This research offered a scientific foundation for treating miscellaneous filled soil roadbeds and validates the applicability of column hammer expansion pile technology in miscellaneous fill subgrade treatment.
miscellaneous fill soilcolumn hammer expansion pile technologysubgrade treatmentmechanical effectsconstruction technology
万方数据
维普
