based on the machine development, a research and analyses of auger drill bits with different kinds of drill tips and soil cut blade angles were carried out in tree planting field.
在设备研制成功的基础上 ,对鉆孔机鉆头不同鉆尖、不同切土刀刃角进行了实地试验研究和分析 。
combined with engineering example the characteristics of auger drill and construction defects for special strata are discussed.