1) advance drilling
超前钻
1.
The programe of setting of steel casings with the mature and effective methods of advance drilling and throwing fills in the clay and the slabstone and the cement is taken.
50 m大直径钻孔灌注桩,由于存在深水、基岩倾斜、岩溶等因素,导致了复杂的成孔工艺,采用"钢护筒跟进"方案结合超前钻、抛填粘土、片石、水泥等较成熟且有效的方法进行施工,根据处理溶洞漏浆、塌孔、卡锤和埋锤的经验,总结了深水岩溶桩基的施工技术。
4) advanced percussive drill
超前冲击钻
1.
The advanced percussive drilling exploration in the rock tunnel is a direct geologic forecast method which is convenient,fast and inexpensive.
超前冲击钻钻探是岩石隧道中一种轻便、快捷、成本较低的直接地质预报方法,通过钻进数据可以判断掌子面前方地层的状况,降低地质事故的发生率。
5) predrilling
打超前钻眼
6) drainage by pre-berriod pipeling
超前释放钻
补充资料：冻土钻(见取土钻)
冻土钻(见取土钻)
dongtuzuan冻土钻见取土钻
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条