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Failure mechanisms of wind-induced post-seismic rockfall hazard

  • Xiangjun Pei
  • Jing LuoEmail author
  • Runqiu Huang
Original Paper
  • 36 Downloads

Abstract

The 2008 Mw 7.9 Wenchuan earthquake generated a tremendous number of coseismic landslides and induced dynamic crack propagation in the bedrock of slopes. These processes produced loose material that could be entrained in subsequent landslides potentially triggered by prevailing valley wind in the earthquake-affected area. However, almost nothing is currently known about the influence of wind in triggering rockfall hazard. Therefore, we provide insights into the failure process and mechanics of wind-induced rockfall hazard by means of wind tunnel tests using different rock geometries. First, a 1:1-scale failure process simulation is used to model the aerodynamic instability of different geometries of rock blocks, and results reveal that (i) cubic rocks fail via downwind sliding; (ii) cuboid rocks fail via tailwind toppling or crosswind toppling (the latter only occurs when the unstable rock mass is close to the neighboring wall); and (iii) ellipsoid rocks fail via headwind clockwise rolling. The critical wind speed is inversely proportional to the angle of attack, the aspect ratio, and the ellipticity ratio. Second, a mechanical analysis is performed in terms of aerodynamic coefficients based on 6:1- and 4:1-scale wind pressure measurements, which is beneficial for studying the crucial factors involved in the occurrence of different failure modes. In addition, fast and effective methods to estimate the critical wind speed for sliding and tailwind toppling are developed, respectively.

Keywords

Rockfall hazard Wenchuan earthquake Post-seismic landslides Wind tunnel test Wind pressure coefficient 

Notes

Acknowledgments

We are grateful to Dr. Martin G. Culshaw for his helpful suggestions and meticulous editing, as well as three anonymous reviewers for their critical questions and constructive comments, which helped to improve the draft manuscript. We also thank American Journal Experts for correcting the English of this manuscript. This research was supported by the National Science Foundation of China (No. 41572302) and the Science Fund for Creative Research Groups (No. 41521002).

References

  1. Bacon D, Cahill T, Tombrello TA (1996) Sailing stones on Racetrack playa. J Geol 104(1):121–125CrossRefGoogle Scholar
  2. Barenblatt GI (1996) Scaling, self-similarity, and intermediate asymptotics: dimensional analysis and intermediate asymptotics. Cambridge University Press, CambridgeCrossRefGoogle Scholar
  3. Barlow JB, Rae WH, Pope A (1999) Low-speed wind tunnel testing, 3rd edn. Wiley, New YorkGoogle Scholar
  4. Blau PJ (2008) Friction science and technology: from concepts to applications, 2nd edn. CRC Press Taylor and Francis Group, Boca RatonCrossRefGoogle Scholar
  5. Castro IP, Robins AG (1977) The flow around a surface-mounted cube in uniform and turbulent streams. J Fluid Mech 79(2):307–335CrossRefGoogle Scholar
  6. Chigira M, Wu XY, Inokuchi T, Wang G (2010) Landslides induced by the 2008 Wenchuan earthquake, Sichuan, China. Geomorphology 118(3–4):225–238CrossRefGoogle Scholar
  7. Copons R, Vilaplana JM, Linares R (2009) Rockfall travel distance analysis by using empirical models (Solà d’Andorra la Vella, Central Pyrenees). Nat Hazards Earth Syst 9(6):2107–2118CrossRefGoogle Scholar
  8. Dai FC, Xu C, Yao X, Xu L, Tu XB, Gong QM (2011) Spatial distribution of landslides triggered by the 2008 Ms 8.0 Wenchuan earthquake, China. J Asian Earth Sci 40(4):883–895CrossRefGoogle Scholar
  9. Engineering ToolBox (2004) Friction and friction coefficients. Available at: https://www.engineeringtoolbox.com/friction-coefficients-d_778.html
  10. E.S.D.U (1970) Engineering science data item, No. 70013. Engineering Sciences Data Unit, LondonGoogle Scholar
  11. Gillette D (1978) A wind tunnel simulation of the erosion of soil: Effect of soil texture, sandblasting, wind speed, and soil consolidation on dust production. Atmos Environ 12(8):1735–1743CrossRefGoogle Scholar
  12. Gorum T, Fan X, van Westen CJ, Huang RQ, Xu Q, Tang C, Wang G (2011) Distribution pattern of earthquake-induced landslides triggered by the 12 May 2008 Wenchuan earthquake. Geomorphology 133(3–4):152–167CrossRefGoogle Scholar
  13. Hoerner SF (1965) Fluid-dynamic drag: theoretical, experimental and statistical information. Hoerner fluid dynamics, New YorkGoogle Scholar
  14. Holmes JD (2015) Wind loading of structures, 3rd edn. CRC Press, Boca RatonCrossRefGoogle Scholar
  15. Huang RQ, Li WL (2014) Post-earthquake landsliding and long-term impacts in the Wenchuan earthquake area, China. Eng Geol 182:111–120CrossRefGoogle Scholar
  16. Huang RQ, Pei XJ, Fan XM, Zhang WF, Li SG, Li BL (2012) The characteristics and failure mechanism of the largest landslide triggered by the Wenchuan earthquake, May 12, 2008, China. Landslides 9(1):131–142CrossRefGoogle Scholar
  17. Huang RQ, Liu WH (2009) In-situ test study on characteristics of rolling rock blocks based on orthogonal design. Chin J Rock Mech Eng 28(5):882–891 (in Chinese)Google Scholar
  18. Hunt A (1982) Wind-tunnel measurements of surface pressures on cubic building models at several scales. J Wind Eng Ind Aerodyn 10(2):137–163CrossRefGoogle Scholar
  19. Jones R, Hooke RL (2015) Racetrack Playa: Rocks moved by wind alone. Aeolian Res 19:1–3CrossRefGoogle Scholar
  20. Kirk LG (1952) Trails and rocks observed on a playa in Death Valley National Monument, California. J Sediment Res 22(3):173–181Google Scholar
  21. Koi T, Hotta N, Ishigaki I, Matuzaki N, Uchiyama Y, Suzuki M (2008) Prolonged impact of earthquake-induced landslides on sediment yield in a mountain watershed: The Tanzawa region, Japan. Geomorphology 101(4):692–702CrossRefGoogle Scholar
  22. Lin GW, Chen H, Chen YH, Horng MJ (2008) Influence of typhoons and earthquakes on rainfall-induced landslides and suspended sediments discharge. Eng Geol 97(1–2):32–41CrossRefGoogle Scholar
  23. Lorenz RD, Jackson B, Barnes JW (2010) Inexpensive time-lapse digital cameras for studying transient meteorological phenomena: dust devils and playa flooding. J Atmos Ocean Technol 27(1):246–256CrossRefGoogle Scholar
  24. Lorenz RD, Jackson BK (2014) Declining rock movement at Racetrack Playa, Death Valley National Park: An indicator of climate change? Geomorphology 211:116–120CrossRefGoogle Scholar
  25. Lu YE, Zhang LM (2012) Analysis of failure of a bridge foundation under rock impact. Acta Geotech 7(1):57–68CrossRefGoogle Scholar
  26. Messina P, Stoffer P (2000) Terrain analysis of the Racetrack Basin and the sliding rocks of Death Valley. Geomorphology 35(3–4):253–265CrossRefGoogle Scholar
  27. Norris RD, Norris JM, Lorenz RD, Ray J, Jackson B (2014) Sliding rocks on Racetrack Playa, Death Valley National Park: first observation of rocks in motion. PLoS One 9(8):e105948CrossRefGoogle Scholar
  28. Reid JB Jr, Bucklin EP, Copenagle L, Kidder J, Pack SM, Polissar PJ, Williams ML (1995) Sliding rocks at the Racetrack, Death Valley: What makes them move? Geology 23(9):819–822CrossRefGoogle Scholar
  29. Sachs P (2013) Wind forces in engineering, 2nd edn. Pergamon Press, OxfordGoogle Scholar
  30. Sanz-Montero ME, Rodríguez-Aranda JP (2013) The role of microbial mats in the movement of stones on playa lake surfaces. Sediment Geol 298:53–64CrossRefGoogle Scholar
  31. Simiu E, Scanlan RH (1996) Wind effects on structures: fundamentals and applications to designGoogle Scholar
  32. Sharp WE (1960) The movement of playa scrapers by the wind. J Geol 68(5):567–572CrossRefGoogle Scholar
  33. Tang C, Zhu J, Li WL, Liang JT (2009) Rainfall-triggered debris flows following the Wenchuan earthquake. Bull Eng Geol Environ 68(2):187–194CrossRefGoogle Scholar
  34. Tang C, Zhu J, Ding J, Cui XF, Chen L, Zhang JS (2011) Catastrophic debris flows triggered by a 14 August 2010 rainfall at the epicenter of the Wenchuan earthquake. Landslides 8(4):485–497CrossRefGoogle Scholar
  35. Wang ZY, Shi WJ, Liu DD (2011) Continual erosion of bare rocks after the Wenchuan earthquake and control strategies. J Asian Earth Sci 40(4):915–925CrossRefGoogle Scholar
  36. Wehmeier E (1986) Water induced sliding of rocks on playas alkali flat in big smoky valley, Nevada. Catena 13(1–2):197–209CrossRefGoogle Scholar
  37. White FM (2017) Fluid Mechanics, 8th edn. McGraw-Hill Book Company, BostonGoogle Scholar
  38. Xu C, Xu XW, Zhou BG, Yu GH (2013) Revisions of the M 8.0 Wenchuan earthquake seismic intensity map based on co-seismic landslide abundance. Nat Hazards 69(3):1459–1476CrossRefGoogle Scholar
  39. Xu C, Xu XW, Yao X, Dai FC (2014) Three (nearly) complete inventories of landslides triggered by the May 12, 2008 Wenchuan Mw 7.9 earthquake of China and their spatial distribution statistical analysis. Landslides 11(3):441–461CrossRefGoogle Scholar
  40. Xu Q, Fan XM, Huang RQ, Van Westen C (2009) Landslide dams triggered by the Wenchuan Earthquake, Sichuan Province, south west China. Bull Eng Geol Environ 68(3):373–386CrossRefGoogle Scholar
  41. Yunus AC, Cimbala JM (2017) Fluid mechanics, fundamentals and applications, 4th edn. McGraw Hill, New YorkGoogle Scholar
  42. Zhang LM, Zhang S, Huang RQ (2014) Multi-hazard scenarios and consequences in Beichuan, China: the first five years after the 2008 Wenchuan earthquake. Eng Geol 180:4–20CrossRefGoogle Scholar
  43. Zheng YS, Li XM, Ying W (2007) Process of wind load in geologic hazards. Glob Geol 26(3):333–337 (in Chinese)Google Scholar

Copyright information

© Springer-Verlag GmbH Germany, part of Springer Nature 2019

Authors and Affiliations

  1. 1.State Key Laboratory of Geohazard Prevention and Geoenvironment ProtectionChengdu University of TechnologyChengduChina

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