摘要
通过对大兴安岭林区冲击钻孔灌注桩的施工钻具及施工工艺过程的现地考察,提出了切实可行的提高冲击钻孔效率的具体方法。在不改变动力设备条件下,开孔阶段、中孔阶段、终孔阶段的冲程H值分别为1.0、2.0、0.5m。冲击频率12～20次/h,改进的钻刃夹角α=90°～100°。
Through the spot investigation of the construction boring rig and the process of thchnology of the inpact bored pile in Daxingan Mountain region, we put forward the specific method which promoted the effiency of the inpact bore hole. Under the condition of not changing the power plant, stroke H separately is:① the opened hole stage 1.0 M,② the middle hole stage 2.0 M, ③ the ended hole Stage 0.5 M. The impaet frequency is 12 to 20 times per hour. The included angle of the boring blade is improved to α= 90° to 100°.
出处
《东北林业大学学报》
CAS
CSCD
北大核心
1993年第2期111-115,共5页
Journal of Northeast Forestry University
关键词
冲击
钻孔
效率
林区
Stroke
Impact bore hole
Boring rig
Effiency
Frequency
