Experiment Study of the Soft Rock Materials Based on Rotary Penetration Test

Abstract:

Based on the new-style rotary penetration instrument, the rotating-incising-drilling experiment for the hard rock material are tested in this paper. The conclusion is that rotary penetration test can more effectively improve the drilling capacity than cone penetration test using in hard layer such as soft rock、hard loess and so on, and reduce bit pressure without improving the capability of instruments based on the factor that using rotary drilling instead of direct drilling. Further analyses have shown that the qualitative relationships between rotary penetration test data and basic mechanical parameters can be preliminarily obtained.The results establish a foundation for further study of rotary penetration technique using in hard layer.

• Periodical: Advanced Materials Research (Volumes 594-597)
• Pages: 502-505
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.594-597.502
• Online since: November 2012
• Authors: Qian Li, Ning Li
• Keywords: Bit Pressure, Drilling Depth, Mechanical Parameters, Rotary Penetration Test, Torque Moment

References

[1] GB50021-2001. "Geotechnical Investigation Specification", China Architecture & Building Press, 2001.

[2] Yongle Li. "Geotechnical Engineering Exploration", Henan: Yellow River Conservancy Press, 2004, 3: 157-169.

[3] Yukun Mao. "The resistance impact factors research and instrument development of gyration penetration", Xi'an: Xi'an University of Technology, 2007, 3.

[4] Yukun Mao, Fengyin Liu, Ning Li, et, al. "CPT Theory Analysis and A New Idea for Improving Penetration Capability", Northwestern Seismological Journal, 2007, 3(1):40-44.

[5] Shimei Luo. "Laboratory Test of the Application of New Rotary Penetration Apparatus in Stiff Loess", Xi'an: Xi'an University of Technology, 2008, 3.