1887

Abstract

Summary

In this work, we present the analysis of seismic noise recordings we performed in northern Italy. Surveys were carried out on large rock blocks and pillars at two sites, namely Pietra di Bismantova and Torrioni di Rialba, and on a small limestone block that was forced to fail during a controlled collapse test. Our aim is to identify the resonance frequencies of the investigated rock structures, to correlate them with the geological features of each site and to track their possible variations across following measurement epochs. Within this perspective, ambient vibrations recordings have been processed with a standard sequence and noise spectra and spectral ratios techniques have been evaluated. The obtained results showed resonance frequency variations appear to be correlated with both meteorological parameters, such as wind and temperature fluctuation, and the breakage of rock bridges. This study confirms the potential of ambient vibrations to provide information about the inner structural setting of rock masses, which is a key parameter for monitoring purposes and mitigation strategies.

Loading

Article metrics loading...

/content/papers/10.3997/2214-4609.201802611
2018-09-09
2020-02-26
Loading full text...

Full text loading...

References

  1. Arosio, D., Longoni, L., Papini, M., Scaioni, M., Zanzi, L., and Alba, M.
    [2009]. Towards rockfall forecasting through observing deformations and listening to microseismic emissions. Nat. Hazards Earth Syst. Sci.9, 1119–1131.
    [Google Scholar]
  2. Arosio, D., Longoni, L., Mazza, F., Papini, M., and Zanzi, L.
    [2013]. Freeze-thaw cycle and rockfall monitoring. In Landslide Science and Practice: Early warning, instrumentation and monitoring, Margottini, C., Canuti, P., Sassa, K., eds. (Springer, Berlin), Vol. 2, pp. 385–390.
    [Google Scholar]
  3. Arosio, D., Corsini, A., Giusti, R., and Zanzi, L.
    [2017]. Seismic Noise Measurements on Unstable Rock Blocks: The Case of Bismantova Rock Cliff. In Advancing Culture of Living with Landslides, M.Mikoš, Ž.Arbanas, Y.Yin, and K.Sassa, eds. (Cham: Springer International Publishing), pp. 325–332.
    [Google Scholar]
  4. Arosio, D., Longoni, L., Papini, M., Boccolari, M., and Zanzi, L.
    [2018]. Analysis of microseismic signals collected on an unstable rock face in the Italian Prealps. Geophys. J. Int.213, 475–488.
    [Google Scholar]
  5. Bottelin, P., Jongmans, D., Baillet, L., Lebourg, T., Hantz, D., Levy, C., Le Roux, O., Cadet, H., Lorier, L., Rouiller, J.-D.,
    [2013]. Spectral Analysis of Prone-to-fall Rock Compartments using Ambient Vibrations. J. Environ. Eng. Geophys.18, 205–217.
    [Google Scholar]
  6. Burjánek, J., Moore, J.R., Yugsi Molina, F.X., and Fäh, D.
    [2012]. Instrumental evidence of normal mode rock slope vibration: Evidence of normal mode rock slope vibration. Geophys. J. Int.188, 559–569.
    [Google Scholar]
  7. Clinton, J.F.
    [2006]. The Observed Wander of the Natural Frequencies in a Structure. Bull. Seismol. Soc. Am.96, 237–257.
    [Google Scholar]
  8. Colombero, C., Baillet, L., Comina, C., Jongmans, D., and Vinciguerra, S.
    [2017]. Characterization of the 3-D fracture setting of an unstable rock mass: From surface and seismic investigations to numerical modeling: Fracture Settings of an Unstable Cliff. J. Geophys. Res. Solid Earth122, 6346–6366.
    [Google Scholar]
  9. Frayssines, M., and Hantz, D.
    [2006]. Failure mechanisms and triggering factors in calcareous cliffs of the Subalpine Ranges (French Alps). Eng. Geol.86, 256–270.
    [Google Scholar]
  10. Lévy, C., Baillet, L., Jongmans, D., Mourot, P., and Hantz, D.
    [2010]. Dynamic response of the Chamousset rock column (Western Alps, France). J. Geophys. Res.115.
    [Google Scholar]
  11. Longoni, L., Arosio, D., Scaioni, M., Papini, M., Zanzi, L., Roncella, R., and Brambilla, D.
    [2012]. Surface and subsurface non-invasive investigations to improve the characterization of a fractured rock mass. J. Geophys. Eng.9, 461–472.
    [Google Scholar]
  12. NakamuraYA
    [1989] Method for dynamic characteristics estimation of subsurface using microtremors on the ground surface. Q Rep Railway Tech Res Inst30:25–30
    [Google Scholar]
  13. Nogoshi, M., and T.Igarashi
    [1971]. On the amplitude characteristics of microtremor (part 2), J. Seism. Soc. Japan24, 26–40 (in Japanese with English abstract).
    [Google Scholar]
http://instance.metastore.ingenta.com/content/papers/10.3997/2214-4609.201802611
Loading
/content/papers/10.3997/2214-4609.201802611
Loading

Data & Media loading...

This is a required field
Please enter a valid email address
Approval was a Success
Invalid data
An Error Occurred
Approval was partially successful, following selected items could not be processed due to error