Novel resistance to plucking inflation friction stock

• Main Authors: FENG LIANG, JIANG HONGTAO, ZHANG LING, XU YUHUA, CHENG JIN, LI YANG, GUO CHUNCHENG, XIE LEI, HE YONG, TANG CHANGYAO
• Format: Patent
• Language: English
• Published: 16.12.2015
• Subjects: EARTH DRILLING; EMBANKMENTS; EXCAVATIONS; FIXED CONSTRUCTIONS; FOUNDATIONS; GALLERIES; HYDRAULIC ENGINEERING; LARGE UNDERGROUND CHAMBERS; MINING; SHAFTS; SOIL SHIFTING; TUNNELS; UNDERGROUND OR UNDERWATER STRUCTURES

The utility model discloses a novel resistance to plucking inflation friction stock, including conical head screwed pipe, expansion pipe, inside and outside tooth fastener and stock, on the conical head screwed pipe is placed in to the inflation pipe box, tooth end screw thread connection in the conical head screwed pipe tip and the outer tooth end screw thread connection of inside and outside tooth fastener, stock tip and inside and outside tooth fastener, the expansion pipe tip is provided with a tube socket, is provided with a nut in the tube socket, the nut connect soon in on the conical head screwed pipe, the tube socket is square, and it is difficult rotatory that it places the ground in situ in, and the stock is being exerted under the torsion effect, and the conical head screwed pipe moves for the expansion pipe backward, and conical head screwed pipe tip extrusion expansion pipe makes its fracture open, and the diameter of uplift part is very big, and the expansion pipe is three lamella swords form pipe, and the effect that its expansion pipe pipe lamella inserted soil layer or rock stratum is darker, and the frictional resistance of formation is bigger, and anchor eye slip casting reaches good anchor and resistance to plucking effect, because the stock is connected with inside and outside tooth fastener, the stock recycle that can screw out, resources are saved.