水平定向钻扩孔孔型对后续施工的影响

Effect of Horizontal Directional Drilling(HDD) Reaming Pass on Follow-up Construction

水平定向钻在不同的地层施工中,扩孔后的最终成孔状态随地质状况的不同而有所不同,对于施工中的切削量计量、回拖力估值、后期的运营管理均有影响。采用理论计算与施工现场实际情况对比分析的方法,总结出在不同地层施工时,成孔的最终状态对上述3个因素的影响程度,为不同地层施工时的切削量计算、回拖力估算提供了理论支持。

Horizontal directional drilling in different strata construction,the final state of hole formation after reaming varies with different geological conditions,which has an impact on cutting quantity measurement,pullback force estimation and later operation and management.By using the method of comparison and analysis between theoretical calculation and actual situation of construction site,the influence degree of the final state of hole formation on the above three factors is summarized,which provides theoretical support for the calculation of cutting amount and the estimation of pullback force in different strata construction.