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近年来,我队在直孔施工中,采用氢氟酸玻璃管定向纠斜,取得较好效果,现将方法简述于后,供同志们参考.一、套管式定向具及定向方法氢氟酸玻璃管定向装置,由焊在楔面顶端中心的方向桩和装有铅印钻头的测具两部分组成(图1).测具内装有盛氢氟酸的玻璃管,玻璃管上预先划好的母线(过A点)与测具和铅印钻头上的母线(过B点,简称
In recent years, our team in the straight hole construction, the use of directional correction of hydrofluoric acid glass tube, and achieved good results, the method is outlined in the future, for the comrades for reference.First, the casing orientation and directional method of hydrogen Fluorinated glass tube orientation device, welded by the wedge in the center of the top of the direction of the pile and the lead-bearing drill with the two parts of the test tool (Figure 1) .Has built hydrofluoric acid glass tube, pre-planted on the glass tube Of the bus (over A point) and the lead and drill on the probe bus (over B point, referred to as