[非垂直孔长螺旋钻进技术的试验研究]代国忠

【非垂直孔长螺旋钻进技术的试验研究】代国忠.pdfTheTeststudyofLong-augering Technique with Non-straight Hole(Absiract) Postgraduate Dai Guo-zhong Teacher Zheng Pei-gen Professor In the paper long-augeriug with non-straight hole(it i6 stressed to driii anchor hole of earthformations)have been studied by test,on the basis of the applications of l5.Changingof drill hoie dipangleis connected with itself drillweight as well rock cutting stackingupthe lower part of thc augcr holc.As620°,drillholedipangle decrease(0°-0°)/m 6.3、斜孔长螺旋钻进两个具有代表性及广泛适用性的钻进总功率 经验公式为:Ry²sinaRcosY N=2x0P0-0a.- 0sin(aR+Y)N=0x+0Po+0n-0θ+Ry²+0-15 4、对错固钻孔的钻具承受的最大扭矩及应力进行了计算。如钻 进30m深的土层锚杆钻孔,钻具承受的最大扭短为2424N.m,钻杆最大 应力是218MPa.5、影响钻孔倾角:日)的变化主要有螺旋钻具自身重量及土屑在 钻孔下部堆积两个因素。当螺旋钻孔倾角0
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