4.When using horizontal directional drilling rigs for crossing construction, there is no water or underwater operation, it will not affect the navigation of the river, and it will not damage the dams and river bed structures on both sides of the river. The construction is not limited by the seasons, and it has short construction period, few personnel and high success rate. Construction safety Reliability and other characteristics.
5.Compared with other construction methods, the speed of entering and leaving the site is fast, the construction site can be flexibly adjusted, especially in urban construction, it can fully show its superiority, and the construction area is small. The project cost is low and the construction speed is fast.
6.When a large river crosses, because the pipeline is buried 9-18 meters below the stratum, there is little oxygen and other corrosive substances in the stratum, so it plays the role of natural anticorrosion and thermal insulation, which can ensure the pipeline runs longer.
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