油气管道短距离定向钻套管穿越公路技术

油气管道穿越等级公路时，存在施工周期长、工程投资高、施工风险大等难题，因此探索一种新的施工方式具有较大的实际意义和经济意义。短距离定向钻套管穿越公路技术应用了小型定向钻机，并在确保油气管线距公路路面达到安全距离和公路两侧路边沟渠不受影响的条件下，取消了穿越段两端弹性敷设曲线段，采用了只回拖套管的水平段的施工方式。该施工方式技术措施安全可行，且能缩短施工周期，减少穿越长度，节省工程投资。

Study of the Short-Distance Horizontal Directional Drilling Technology for Pipeline Crossing Highways

There are many technical and economic problems with pipeline crossing highways such as long-term construction, huge investment and high risks. So it is of more practical and economic significance to explore a new way of construction. The technology of horizontal directional drilling can be used on pipeline crossing highways. By using a small drilling machine, both sides of elastically-laid segments can be canceled instead of straight casing pipe. In this way, the safe distance between the pipe- lines and the surface of the road is not affected by either side of the gullies. This kind of construction technology is very safe and feasible. Also, it will shorten the construction time and reduce the crossing length and save investment.