预制桩在砂土地区的挤密效应的分析

摘要

预制桩因工期短、施工方便、质量可靠等优点，得到了越来越广泛应用。在砂土地区，预制桩施工后，由于桩的挤密效应，通过降低孔隙水压力，增加有效应力，使得土体的强度提升，同时，因砂土的挤密效应也会使桩的承载力大幅度提高。%More precast piles have been widely used due to its short duration,convenience and reliability of construction etc. While the precast piles are driven into sand clay area,effective stress and soil strength increases with the reduction of pore water pressure due to pile extrusion effect. Meanwhile,the bearing capacity of piles also increases greatly because of sand clay extrusion effect.