The Combined Guiding Hole Technology of Large Diameter DTH Hammer and Long Screw-Pile Driver

Abstract:

From an engineering reality, in order to solve complex stratigraphic drilling problems and improve construction efficiency, the method of combination of large diameter DTH hammer and the pile driver with a special long spiral drill multifunctional is proposed. This method has the characteristics of simple equipment, fast, effective, low cost etc. It can quickly drill through layers of gravel, stone, weathered bedrock, reach to depth up to above 25m. It has been widely used in embedded engineering methods of precast piles, the long spiral rock-socketed piles, piles into the rock currently. The study of this construction method has not only wide range of applications, but also has a wide range of practical and theoretical significance.

• Periodical: Applied Mechanics and Materials (Volumes 204-208)
• Pages: 181-187
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.204-208.181
• Online since: October 2012
• Authors: Qi Xia Liu, Liang Fan
• Keywords: Compound Drilling Tool, DTH Hammer, Long Spiral, Technology of Guiding Hole

References

[1] Liu Jinghui. A Brief Explanation of Air Actuated DTH Hammer Drilling Efficiency. Coal Geology of China.2009.3

[2] Li shi-ren, Chen de-wen. Construction techniques of long bored pile embedded in rock. Chinese Jounal of Geotechnical Engineering. 2001.6

[3] Zhao wei, Wu xu-jun. The Application and Research of the Large Diameter Air Operated Down Hole Hammer in Guiding-hole for Pile-sinking at the Layer of Gravel and Boulders Mixed Together. Guangzhou Architecture . 2005,9

[4] Huang Yanbin; Yu Liming. Application Development and the Achievements of Air DTH Hammer Drilling Technology in Henan. Exploration Engineering(Rock & Soil Drilling and Tunneling).2012.1. (in Chinese)

[5] Liu Jiarong; 2; Wang Jianhua. Some Problems on Pneumatic DTH Drilling. Exploration Engineering(Rock & Soil Drilling and Tunneling).2010.5. (in Chinese)