小口径管推进工法小口径管推进工法的分类小口径管推进工法根据推进管的种类可分为高承载力方式、低承载力方式和钢套管方式。按切削、排土方式,管的铺设方式细分为压入方式、螺旋钻方式、泥水方式和泥土压方 Small-caliber pipe propulsion method Small-caliber pipe propulsion method classification Small caliber pipe propulsion method according to the type of propulsion pipe can be divided into high bearing capacity, low bearing capacity and steel casing. According to the cutting, dumping methods, pipe laying method is subdivided into the pressure into the way, auger way, mud way and earth pressure side