Fast Door-Opening Method for Quick Release of Rock Boulder or Debris in Large-Scale Physical Model
Publication: International Journal of Geomechanics
Volume 20, Issue 2
Abstract
Study on the mitigation of debris flows and rockfalls is a very challenging topic due to complex moving and impacting mechanisms. A large-scale physical model is preferred by researchers in the study of debris flow and rockfall, because large-scale tests can duplicate major phenomena of natural geohazard events. In the design of a large-scale physical model, how to initiate or release a certain volume of debris material or a giant rock boulder is the key technical issue. In current large-scale models for debris flow research, debris material is normally released from a reservoir with a trap door located at the upper end of the flowing path. It has been found that the door-opening methods utilized in models can interfere with the motions of the generated debris flows. In this paper, a new fast door-opening method is introduced in detail. This method has been implemented in a large-scale physical model built in Hong Kong to study the impacts of rockfalls and debris flows on a flexible barrier. With the utilization of this novel door-opening method, the impact tests of rock boulders, dry granular flows, and debris flows were successfully performed. From the observations of the impact tests, the unbalanced resisting forces and the disturbance from the door were avoided. The successes of large-scale tests using different testing materials demonstrated that the new fast door-opening method can be further utilized in a physical modeling study of geohazards.
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Acknowledgments
The authors acknowledge financial support from the Research Institute for Sustainable Urban Development of the Hong Kong Polytechnic University (PolyU). The work in this paper was also supported by a Collaborative Research Fund (CRF) project (Grant No. PolyU12/CRF/13E) from the Research Grants Council (RGC) of the Hong Kong Special Administrative Region Government of China. The financial supports from PolyU grants (1-ZVCR. 1-ZVEH. 4-BCAU, 4-BCAW, 4-BCB1, 5-ZDAF) are also acknowledged. This paper was also supported by the National Natural Science Foundation of China (Number 51608005) and the Research Centre for Urban Hazards Mitigation of Faculty of Construction and Environment of PolyU.
References
Bugnion, L., B. W. McArdell, P. Bartelt, and C. Wendeler. 2012. “Measurements of hillslope debris flow impact pressure on obstacles.” Landslides 9 (2): 179–187. https://doi.org/10.1007/s10346-011-0294-4.
Fan, W., Y.-N. Wei, and L. Deng. 2018. “Failure modes and mechanisms of shallow debris landslides using an artificial rainfall model experiment on Qin-ba Mountain.” Int. J. Geomech. 18 (3): 04017157. https://doi.org/10.1061/(ASCE)GM.1943-5622.0001068.
Iverson, R. M. 2015. “Scaling and design of landslide and debris-flow experiments.” Geomorphology 244 (Sep): 9–20. https://doi.org/10.1016/j.geomorph.2015.02.033.
Iverson, R. M., J. E. Costa, and R. G. LaHusen. 1992. Debris-flow flume at HJ Andrews Experimental Forest, Oregon. Washington, DC: USGS.
Iverson, R. M., M. Logan, R. G. LaHusen, and M. Berti. 2010. “The perfect debris flow? Aggregated results from 28 large-scale experiments.” J. Geophys. Res.: Earth Surf. 115 (F3): 1–29. https://doi.org/10.1029/2009JF001514.
Kang, C., and D. Chan. 2017. “Modeling of entrainment in debris flow analysis for dry granular material.” Int. J. Geomech. 17 (10): 04017087. https://doi.org/10.1061/(ASCE)GM.1943-5622.0000981.
Kwan, J. S. H., and R. W. M. Cheung. 2012. Suggestion on design approaches for flexible debris resisting barriers. Hong Kong: Geotechnical Engineering Office, Hong Kong Special Administrative Region Government.
Paik, J., S. Son, T. Kim, and S. Kim. 2012. “A real-scale field experiment of debris flow for investigating its deposition and entrainment.” In Proc., AGU Fall Meeting Abstracts. Washington, DC: American Geophysical Union.
Peila, D., and C. Ronco. 2009. “Design of rockfall net fences and the new ETAG 027 European guideline.” Nat. Hazard. Earth Syst. Sci. 9 (4): 1291–1298. https://doi.org/10.5194/nhess-9-1291-2009.
Su, L. J., X. Q. Xu, X. Y. Genge, and S. Q. Liang. 2017. “An integrated geophysical approach for investigating hydro-geological characteristics of a debris landslide in the Wenchuan Earthquake Area.” Eng. Geol. 219 (Mar): 52–63. https://doi.org/10.1016/j.enggeo.2016.11.020.
Takahashi, T. 2014. Debris flow: Mechanics, prediction and countermeasures. Boca Raton, FL: CRC Press.
Tan, D. Y., J. H. Yin, W. Q. Feng, J. Q. Qin, and Z. H. Zhu. 2018a. “Large-scale physical modelling study of a flexible barrier under the impact of granular flows.” Nat. Hazard Earth Syst. Sci. 18 (10): 2625–2640. https://doi.org/10.5194/nhess-18-2625-2018.
Tan, D. Y., J. H. Yin, J. Q. Qin, Z. H. Zhu, and W. Q. Feng. 2018b. “Large-scale physical modeling study on the interaction between rockfall and flexible barrier.” Landslides 15 (12): 2487–2497. https://doi.org/10.1007/s10346-018-1058-1.
Volkwein, A., R. Baumann, C. Rickli, and C. Wendeler. 2015. “Standardization for flexible debris retention barriers.” In Vol. 2 of Engineering geology for society and territory, 193–196. Cham, Switzerland: Springer.
Wendeler, C., A. Volkwein, B. W. McArdell, and P. Bartelt. 2018. “Load model for designing flexible steel barriers for debris flow mitigation.” Can. Geotech. J. 56 (6): 893–910. https://doi.org/10.1139/cgj-2016-0157.
Won, S., S. W. Lee, J. Paik, C. Y. Yune, and G. Kim. 2016. “Analysis of erosion in debris flow experiment using terrestrial LiDAR.” J. Korean Soc. Surv. Geod. Photogramm. Cartography 34 (3): 309–317. https://doi.org/10.7848/ksgpc.2016.34.3.309.
Xu, D. S., H. B. Liu, and W. L. Luo. 2018. “Evaluation of interface shear behavior of GFRP soil nails with a strain-transfer model and distributed fiber-optic sensors.” Comput. Geotech. 95 (Mar): 180–190. https://doi.org/10.1016/j.compgeo.2017.10.005.
Xu, D. S., Z. Tang, and L. Zhang. 2019. “Interpretation of coarse effect in simple shear behavior of binary sand-gravel mixture by DEM with authentic particle shape.” Constr. Build. Mater. 195 (Jan): 292–304. https://doi.org/10.1016/j.conbuildmat.2018.11.059.
Zhu, H., and M. F. Randolph. 2010. “Large deformation finite-element analysis of submarine landslide interaction with embedded pipelines.” Int. J. Geomech. 10 (4): 145–152. https://doi.org/10.1061/(ASCE)GM.1943-5622.0000054.
Information & Authors
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Published In
International Journal of Geomechanics
Volume 20 • Issue 2 • February 2020
Copyright
©2019 American Society of Civil Engineers.
History
Received: Sep 26, 2018
Accepted: Jun 12, 2019
Published online: Nov 28, 2019
Published in print: Feb 1, 2020
Discussion open until: Apr 28, 2020
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