2) percussion-compact drilling
冲击挤密钻进
1.
The DTH percussion-compact drilling is a high efficiency technology drilling in soil strata, which use the impact force produced by hammer piston to crush and compact soil.
潜孔锤冲击挤密钻进技术集冲击钻进、振动钻进及空气钻进的优点于一体,钻进效率高,成孔质量好,在土质地层钻进工程中有着广阔的应用前景。
2.
In this paper, a model of percussion-compact drilling is set up with ANSYS Finite Element Analysis software.
为了对阶梯式钻头的结构进行优化设计,提高冲击挤密钻进效率,采用Drucker-Prager屈服准则为判据,将土体视为DP材料,冲击钻具视为刚体,利用有限元软件ANSYS建立了冲击挤密钻进有限元模型,基于APDL参数化语言对阶梯钻头的台阶数目及钻头结构尺寸进行了优化设计和试验研究。
3) displacing bits
挤密钻头
1.
The thoeretical analysis is made based on the problems present with the method in anchor installation and two types of displacing bits have been designed.
探讨了潜孔锤冲击挤密钻进成孔法的产生、钻进机理及其优点，并就该成孔法在锚杆孔施工中所存在的问题，从理论上进行了分析研究，并据此设计了两种结构的挤密钻头。
4) percussion-compact
冲击挤密
1.
Finite element analysis on deformation mechanism of soils under percussion-compact
冲击挤密作用下土体变形机理的有限元分析
5) impact bit
冲击钻头
1.
But the matching impact bits often dropped off from the pneumatic hammers and led the well accident caused by complex factors.
但是,空气锤、特别是配套冲击钻头断脱导致的井下事故时有发生,影响因素极为复杂。
6) chopping bit
冲击钻钻头
补充资料：挤密碎石桩加固地基
挤密碎石桩加固地基
挤密碎石桩加固地基
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