The average drilling time of the Sany rotary drilling rig of Kuibei Railway is 3 hours for a single hole

In the early stage of the construction of this railway, our company has a total of 5 drilling rigs into the construction site, and then 3 more have been put on one after another. The railway pile position is 1250mm in diameter, the depth is from 14m to 47m, the geological structure is the silt layer from the ground to the pile position 25-27 meters, and the following is a strong weathered and weakly weathered mudstone or sandstone layer, a total of about 140,000 linear meters of piles, and the unit price varies from 380 yuan/linear meter to 500 yuan/linear meter according to different geology, all of which are cleared holes. The average drilling time of our company's drilling rig is 3 hours for a single hole, 1-1.5 hours faster than the drilling rig of other manufacturers, and now the railway pile foundation has been basically completed, and the weak weathered stratum pile position of the drilling rig of other manufacturers has been transferred to our company's drilling rig construction due to the limitation of work capacity, and the finishing work of the foundation project is completed by our company's 2 SR220C.