The invention relates to a non-excavation horizontal
directional drilling crossing construction method for a high-pressure
gas pipeline, and belongs to the technical field of pipeline laying. The non-excavation horizontal
directional drilling crossing construction method comprises the following steps that a horizontal
directional drilling rig is placed beside a work pit and fixed through anchor rods; a guiding hole is constructed according to the designed pipeline trajectory curve; after the guiding hole is drilled,
broaching is conducted through a
broaching drill bit, and meanwhile
drilling fluid is added into the guiding hole through the
broaching drill bit; a drilling rod for last broaching and the high-pressure
gas pipeline are connected through a
pipe pulling head, and the drilling rod is pulled back to pull the high-pressure
gas pipeline into the guiding hole; and
cement slurry is injected into a gap between the high-pressure gas pipeline and the guiding hole. According to the non-excavation horizontal directional drilling crossing construction method, the hole wall of the drilled hole can be supported by the
drilling fluid in time, the stability of the hole wall is guaranteed, the construction risk caused by hole collapse is reduced, the dosage of
bentonite is less, the construction cost can be reduced, and the environment is protected.