双动力头钻机全套管成孔在咬合桩施工中的应用

Application of full casing drilling with double power head drilling machine in construction of occluded pile

本文以泉州台商投资区海湾大道双山段道路及景观工程2号雨水泵站围护工程为例,在地下水位较高、地层渗透系数较大、砂层较厚等不良地质状况下,对咬合桩施工采用双动力头钻孔机辅以全套管成孔的施工方法、优势进行阐述,并总结了施工中的注意事项和质量控制措施。

Based on the No.2 rain water pump station project of Haiwan Avenue in Quanzhou Taiwan investment area.This paper introduces the construction method and advantages of double power head drilling machine supplemented by full casing hole forming in the construction of occluded pile to deal with the unfavorable geological conditions such as high groundwater table,large permeability coefficient of stratum and thick sand layer.The precautions and quality control measures during the construction are also summarized.