Guided wave nondestructive inspection of grouted rock bolts: Experiment and numerical simulation

Wen He*, Kui Zhao, Cheng Wang, Yi Li, Changsuo Zhang, Yixing Wang

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

1 Citation (Scopus)

Abstract

The properties of a longitudinal guided wave with central frequency 5kHz propagating in partially grouted rock bolts were studied by experimental and numerical simulation methods. The guided wave was excited by the impact-echo method on the free end of the bolt, and the excited wave measured in the experiments was used as excitation input in the numerical simulation. The numerical results match well with the experimental ones. Two empirical formulas were obtained for when the reflected waves from the upper interface and from the embedded end of the bolt could be distinguishably detected. Conclusion is drawn from the simulation results that the guided wave energy velocity in the embedded section of the bolt increases with the increase of elastic modulus of the grout media. A new method was proposed for anchorage quality testing and its effectiveness was proved by a testing example.

Original languageEnglish
Title of host publicationNatural Resources and Sustainable Development
Pages108-115
Number of pages8
DOIs
Publication statusPublished - 2012
Event2011 International Conference on Energy, Environment and Sustainable Development, ICEESD 2011 - Shanghai, China
Duration: 21 Oct 201123 Oct 2011

Publication series

NameAdvanced Materials Research
Volume361-363
ISSN (Print)1022-6680

Conference

Conference2011 International Conference on Energy, Environment and Sustainable Development, ICEESD 2011
Country/TerritoryChina
CityShanghai
Period21/10/1123/10/11

Keywords

  • Anchorage quality
  • Energy velocity
  • Guided wave
  • Numerical simulation
  • Partially grouted rock bolt
  • Reflected wave

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