Device for re-forming hole after hole collapse before pile foundation concrete pouring

• Main Authors: CHEN XINBO, QIAO BIN, YUWEN PUHENG, SHI CHUNTAO, LYU JINGBO, WANG CHAO, TANG KAI, ZHANG CHENYANG, YANG BEN, GAO WENGUANG, CHEN KAILEI
• Format: Patent
• Language: Chinese; English
• Published: 14.11.2023
• Subjects: EARTH DRILLING; EARTH DRILLING, e.g. DEEP DRILLING; FIXED CONSTRUCTIONS; MINING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR ASLURRY OF MINERALS FROM WELLS

The utility model discloses a device for re-forming a hole after hole collapse before pile foundation concrete pouring. A punching drill bit comprises a first pipe body with two through ends, a plurality of steel wire ropes arranged on the outer wall of the first pipe body, a first drill tooth frame connected to one end of the first pipe body and a plurality of first drill teeth arranged at the end of the first drill tooth frame. The hole washing drill bit comprises a second pipe body with the two ends communicated, a plurality of rubber steel wire hoses arranged on the outer wall of the second pipe body and communicated with the second pipe body, a second drill tooth frame connected to one end of the second pipe body, a plurality of second drill teeth arranged at the end of the second drill tooth frame and a one-way valve arranged at one end of the second pipe body. The opening direction of the one-way valve faces the other end of the second pipe body. When the hole is formed again after the hole collapses b