THE EXPANSION OF THE TECHNICAL CAPABILITIES OF THE INSTALLATION HORIZONTAL DIRECTIONAL DRILLING
This article describes the complex ground conditions in which it is impossible to apply the standard method of trenchless laying of underground utilities using horizontal directional drilling. For example, the stretch of the river Ob, presented method, which allows to avoid the collapse of the arch of the borehole and without hindrance to build underpass in areas of alternating resistant and friable soils with the use of casing pipes. Shows a device for dragging casing pipes of different diameters, describes the principle of operation and layout of the mechanism.