基于ANSYS的深孔帷幕灌浆钻孔弯曲机理研究

Drilling Bending Mechanism in Deep Hole Dykes of Curtain Grouting with ANSYS

大岗山水电站深孔帷幕灌浆工程量大,灌浆孔孔斜控制要求高,防斜技术难度大。钻孔弯曲机理研究对指导钻进成孔,防止钻进事故,加快帷幕灌浆施工速度有重要意义。从工区地质条件入手,对深孔帷幕钻孔弯曲原因、钻孔弯曲条件进行分析,并利用ANSYS软件有针对性地建立了不同的钻孔弯曲分析数值模型,很好地揭示了钻孔弯曲机理。根据研究结果采取针对性措施,制定、调整、优化钻进工艺参数,很好地将钻孔偏斜控制在设计范围内,避免了发生钻进事故,加快了帷幕灌浆施工速度,产生了可观的经济效益。

Because the curtain grouting quantities of the dyke is large,the borehole bending requirement of grouting hole is high,the deviation control technique is hard,the bending mechanism of hole is very important.The research of drill-ing bending mechanism has important engineering significance.It can prevent drilling accidents and accelerate the con-struction speed of curtain grouting.First,starting with the geological conditions,the reason and condition of the curtain grouting borehole drilling bending was analyzed.Then the different drilling bending numerical models with ANSYS was developed to reveal the drilling bending mechanism.After that,by taking targeted measures,formulating,adjusting and optimizing drilling process parameters,we control the borehole deflection within the design range to avoid the drilling ac-cidents and accelerate the construction speed of curtain grouting and produce considerable economic benefits.