Foundation construction drill cylinder down-the-hole hammer construction technology under complex geological conditions

• Main Authors: LU YANBAO, XU WANQIANG, KONG QIUPING, FAN MEILING, CHEN FUJUN, ZHENG TIANSHOU, ZHANG QIANG, ZHENG WENMING
• Format: Patent
• Language: Chinese; English
• Published: 14.04.2023
• Subjects: EARTH DRILLING; EARTH DRILLING, e.g. DEEP DRILLING; EMBANKMENTS; EXCAVATIONS; FIXED CONSTRUCTIONS; FOUNDATIONS; HYDRAULIC ENGINEERING; MINING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR ASLURRY OF MINERALS FROM WELLS; SOIL SHIFTING; UNDERGROUND OR UNDERWATER STRUCTURES

The invention discloses a construction process of a drill cylinder down-the-hole hammer for foundation construction under complex geological conditions, which belongs to the field of drilling and comprises the following steps of: measuring and positioning on a construction site foundation, planning a pile foundation construction sequence and placing a drilling machine in place; a drilling barrel down-the-hole hammer drilling tool is adopted, a drilling machine is started, a drilling barrel rotates to drill downwards, meanwhile, quantitative water is injected into a drill hole, and after a certain depth, drilling slag is pumped out; when drilling is conducted to the complex hard stratum, the down-the-hole hammer stretches out of the drill barrel, air is pressed into the piston barrel, the down-the-hole hammer vibrates, the down-the-hole hammer strikes and crushes the complex hard stratum, and drilling continues to be conducted downwards after the down-the-hole hammer penetrates through the complex stratum; and