无循环旋挖法施工卵砾石层钻孔桩

Dry Auger Bored Piles in Bouldery Formation

摘要:

通过工程实例，阐述了无循环旋挖法的施工设备、机具、工艺及技术特点。在卵砾石层中施工大口径钻孔桩，该工法充分显示出成孔效率高、质量好、环境污染小等技术优势，是国内桩基工程施工技术的新发展。

Abstract:

The equipment, drilling tools, drilling process and technical features of the dry auger boring method are described with reference to the field cases. When used to install large diameter bored piles in bouldery formation, the method exhibits fully such technical advantage as high hole completion efficiency, good quality, little environmental pollution and is an advance of the domestic pile foundation drilling technology.