松散陆域钻孔灌注桩钻孔施工的主要工艺特征

Main technological feature of caisson pile drilling construction on loose land area

钻孔灌注桩已经作为成熟软基加固方案广泛应用于工业和民用建筑物、构筑物的基础。随着港口建设的发展,其在港口建设项目中的应用也日益增多。现阶段,港口用地多为抛填棱体块石或回填开山土石形成,系新形成陆域,土体松散,密实性差。在此类松散陆域上进行钻孔灌注桩的钻孔施工须采取较为特殊的施工工艺以保证成孔顺利。阐述松散陆域钻孔灌注桩钻孔施工的主要工艺特征。

As a mature foundation treatment technology, the bored pile is widely used in the foundation treatment of industrial and civil buildings. With the development of the port, the bored pile is put into use increasingly. At the present stage, the port land is usually newly formed with block stones or backfilling of rocks and earth, which is loose and unconsolidated. Some special construction technologies are taken to ensure the bored piles＇ pore-forming successfully. This paper probes into the main technological feature of caisson pile drilling construction on loose land area.