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Dynamic Response of Anchoring Layered Rock Slopes Subjected to Seismic Loads


Affiliations
1 College of Civil Engineering, Hunan City University, Yiyang 413000, China; School of Civil Engineering and Architecture, Hubei University of Arts and Science, Xiangyang 441053, China., China
2 College of Resource Environment and Tourism, Hubei University of Arts and Science, Xiangyang 440153, China; Wufeng Tujia Autonomous County Forestry Bureau, Yichang 443099, China., China
3 College of Resource Environment and Tourism, Hubei University of Arts and Science, Xiangyang 440153, China; CAS Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, China; Hubei Key Laboratory of Low Dimensional Optoelectronic Materials and Devices, Hubei University of Arts and Science, Xiangyang 440153, China., China
 

The seismic dynamic responses of rock slopes are a hot topic for geotechnical engineering studies. Based on the interaction between rock slope and anchor bolts, a dynamic numerical model of a layered rock slope was developed using the finite difference software FLAC3D. The dynamic response patterns of anchored and natural slopes under seismic loads were analysed to obtain the supporting effect of anchor bolts during seismic activity. The results indicate that under seismic loads, tensile cracks at the intersection of the top and joint surface develop into a drawing open surface of the back edge, and a shear slip occurs at the base of the slope, both of which result in the formation of tensile-shear slip failure. Permanent slope displacement accumulates only when seismic acceleration exceeds the critical acceleration. The slope deformation has been constrained, and the performance of the slope during the seismic activity has been strengthened by anchor bolt supports, which significantly increase the ductility of the rock slope under seismic loads. Moreover, during an earthquake, the axial forces of anchor bolts in the middle slope rise more than at any other position. After the earthquake, anchor bolts in the middle have been shown to exhibit maximum axial force. As a complex problem, stability analysis of seismic slopes is important. The analysis of seismic slope failure and the mechanism of slope anchoring are particularly complicated. The present study will help to improve future research on the seismic design and dynamic analysis of slopes supported by anchor bolts.

Keywords

Anchor Bolts, Anti-seismic Effect, Dynamic Res-Ponse, Layered Rock Slope, Seismic Loads.
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  • Hung, J. J., Chi-Chi earthquake induced landslides in Taiwan. Earthq. Eng. Eng. Seismol., 2000, 2(2), 25–33.

  • Ni, J. et al., Dysfunction and post -traumatic stress disorder in frac-ture victims 50 months after the Sichuan earthquake. PLoS ONE, 2013, 8, e77535.

  • Park, S., Wooseok, Kim, W., Lee, J. and Baek, Y., Case study on slope stability changes caused by earthquakes – focusing on Gyeongju 5.8 ML EQ. Sustainability, 2018, 10(10), 3441.

  • Lin, C. W., Liu, S. H., Lee, S. Y. and Liu, C. C., Impacts of the Chi-Chi earthquake on subsequent rainfall-induced landslides in Central Taiwan. Eng. Geol., 2006, 86(2), 87–101.

  • Zhang, S., Zhang, L. M. and Glade, T., Characteristics of earthquake-and rain-induced landslides near the epicenter of Wenchuan earth-quake. Eng. Geol., 2014, 175(11), 58–73.

  • Huang, R. and Li, W., Development and distribution of geohazards triggered by the 5.12 Wenchuan earthquake in China. Sci. China Ser. E, 2009, 52(4), 810–819.

  • Aydan, Ö., Large rock slope failures induced by recent earthquakes. Rock Mech. Rock Eng., 2016, 49(6), 2503–2524.

  • Abe, K., Nakamura, S., Nakamura, H. and Shiomi, K., Numerical study on dynamic behavior of slope models including weak layers from deformation to failure using material point method. Soils Found., 2017, 57(2), 155–175.

  • Lv, Q., Liu, Y. R. and Yang, Q., Stability analysis of earthquake induced rock slope based on back analysis of shear strength parameters of rock mass. Eng. Geol., 2017, 228(10), 39–49.

  • Wartman, J., Seed, R. B. and Bray, J. D., Shaking table modeling of seismically induced deformations in slopes. J. Geotech. Geoenviron. Eng., 2005, 131(5), 610–622.

  • Huang, R. Q., Zhao, J. J., Ju, N. P., Li, G., Min, L. L. and Li, Y. R., Analysis of an anti-dip landslide triggered by the 2008 Wenchuan earthquake in China. Nat. Hazards, 2013, 68(2), 1021–1039.

  • Yu, J., Wang, R. B., Zhang, J. C., Yan, L., Meng, Q. X., Zhang, C. and Li, X. Z., Deformational characteristics of Donglinxin slope induced by reservoir fluctuation and rainfall. Curr. Sci., 2017, 113(6), 1159– 1166.

  • Liu, X., He, C., Liu, S., Liu, Y., Lu, Y. and Liu, Z., Dynamic response and failure mode of slopes with horizontal soft and hard interbed-dings under frequent microseisms. Arab. J. Sci. Eng., 2018, 43(10), 5397–5411.

  • Griffiths, D. V. and Lane, P. A., Slope stability analysis by finite elements. Geotechnique, 1999, 49(3), 387–403.

  • Wang, C., Tannant, D. D. and Lilly, P. A., Numerical analysis of the stability of heavily jointed rock slopes using PFC2D. Int. J. Rock Mech. Min. Sci., 2003, 40(3), 415–424.

  • Choi, S. O. and Chung, S. K., Stability analysis of jointed rock slopes with the Barton-Bandis constitutive model in UDEC. Int. J. Rock Mech. Min., 2014, 41(S1), 581–586.

  • Li, H., Xiao, K. and Liu, Y., Factor of safety analysis of bedding rock slope under seismic load. Chin. J. Rock Mech. Eng., 2007, 26(12), 2385–2394.

  • Wang, G. Y., Zhang, S. H., Xie, W. Q. and Wan, X. D., Numerical analysis of dynamic response and axial stress distribution of rock bolts under explosive loads. J. Min. Saf. Eng., 2009, 26(1), 114–117.

  • Xu, G. X., Yao, L. K., Li, Z. H. and Gao, Z. N., Dynamic response of slopes under earthquakes and influence of ground motion parame-ters. Chin. J. Geotech. Eng., 2008, 30(6), 918–923.

  • Dong, J. H. and Zhu, Y. P., Analysis of response of slope supported with framed anchor to earthquake. J. Lanzhou Univ. Technol., 2008, 34(2), 118–122.

  • Li, X., He, S., Luo, Y. and Wu, Y., Simulation of the sliding process of Donghekou landslide triggered by the Wenchuan earthquake using a distinct element method. Environ. Earth Sci., 2012, 65(4), 1049– 1054.

  • Zheng, Y. R., Ye, H. L. and Huang, R. Q., Analysis and discussion of failure mechanism and fracture surface of slope under earthquake. Chin. J. Rock Mech. Eng., 2009, 28(8), 1714–1723.

  • Zheng, Y. R., Ye, H. L., Huang, R. Q., Li, A. H. and Xu, J. B., Study on the seismic stability analysis of a slope. J. Earthq. Eng. Eng. Vibrat., 2010, 30(2), 173–180.

  • Xu, T., Xu, Q., Deng, M., Ma, T., Yang, T. and Tang, C. A., A numeri-cal analysis of rock creep-induced slide: a case study from Jiweishan mountain, China. Environ. Earth Sci., 2014, 72(6), 2111–2128.

  • Li, D., Liu, X., Li, X. and Liu, Y., The impact of microearthquakes induced by reservoir water level rise on stability of rock slope. Shock Vibr., 2016, 2, 1–13.

  • Lv, Y., Li, H., Zhu, X. and Liu, W., Discrete element method simu-lation of random Voronoi grain-based models. Cluster Comput., 2017, 20(1), 335–345.

  • Chen, K. T. and Wu, J. H., Simulating the failure process of the Xinmo landslide using discontinuous deformation analysis. Eng. Geol., 2018, 239(18), 269–281.

  • Connell, L. D., Coupled flow and geomechanical processes during gas production from coal seams. Int. J. Coal Geol., 2009, 79(1), 18–28.

  • Ti, Z., Zhang, F., Pan, J., Ma, X. and Shang, Z., Permeability enhance-ment of deep hole pre-splitting blasting in the low permeability coal seam of the nanting coal mine. PLoS ONE, 2018, 13(6), e0199835.

  • Ta, L. P., Matsumoto, T. and Hoang, H. N., Numerical studies on dynamic load testing of an open-ended pipe pile and a case study. Geotech. Eng., 2014, 45(2), 17–32.

  • Wang. M. M., Wang, G. L. and Wu, S. G., Stability analysis of soil behind a vertical free-face between supporting piles. Eng. Geol., 2015, 195, 155–163.

  • Li, Y., Jin, X., Feng, Y. and Luo, W., Effect of soft layer on seis-mic response of subway station in layered stratum. J. Vibroeng., 2016, 18(3), 1602–1616.

  • Lu, X., Song, M. and Wang, P., Numerical simulation of the composite foundation of cement soil mixing piles using FLAC 3D . Cluster Comput., 2018, 1, 1–10.

  • He, Z. M., Cai, Z. X., Cao, P., Liu, J. H. and Zhou, L. J., Numerical analysis for stratified rock slope stability reinforced by bolts. J. Cent. South Univ., 2011, 42(7), 2115–2119.

  • Kuhlemeyer, R. L. and Lysmer, J., Finite element method accuracy for wave propagation problems. J. Soil Mech. Found. Div., 1973, 99(5), 421–427.

  • St John, C. M. and Van Dillen, D. E., Rockbolts: a new numerical representation and its application in tunnel design. In Proceedings of the 24th US Symposium on Rock Mechanics, Texas A&M Univer-sity, USA, 1983, pp. 13–24.

  • Cundall, P. A., Hansteen, H., Lacasse, S. and Selnes, P. B., NESSI – soil structure interaction program for dynamic and static problems, Norwegian Geotechnical Institute Report 51508-9, December 1980.

  • Tang, C., Ma, G., Chang, M., Li, W., Zhang, D., Jia, T. and Zhou, Z. Y., Landslides triggered by the 20 April 2013 Lushan earth-quake, Sichuan Province, China: a case study in a region near the epicenter. Eng. Geol., 2015, 187, 45–55.

  • Xu, Q., Main types and characteristics of the geo-hazards triggered by the Wenchuan earthquake. J. Geol. Hazards Environ. Preserv., 2009, 20(2), 86–93.


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  • Dynamic Response of Anchoring Layered Rock Slopes Subjected to Seismic Loads

Abstract Views: 194  |  PDF Views: 97

Authors

Wei Zhou
College of Civil Engineering, Hunan City University, Yiyang 413000, China; School of Civil Engineering and Architecture, Hubei University of Arts and Science, Xiangyang 441053, China., China
Zhengman Ding
College of Resource Environment and Tourism, Hubei University of Arts and Science, Xiangyang 440153, China; Wufeng Tujia Autonomous County Forestry Bureau, Yichang 443099, China., China
Tingting Ma
College of Resource Environment and Tourism, Hubei University of Arts and Science, Xiangyang 440153, China; CAS Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, China; Hubei Key Laboratory of Low Dimensional Optoelectronic Materials and Devices, Hubei University of Arts and Science, Xiangyang 440153, China., China

Abstract


The seismic dynamic responses of rock slopes are a hot topic for geotechnical engineering studies. Based on the interaction between rock slope and anchor bolts, a dynamic numerical model of a layered rock slope was developed using the finite difference software FLAC3D. The dynamic response patterns of anchored and natural slopes under seismic loads were analysed to obtain the supporting effect of anchor bolts during seismic activity. The results indicate that under seismic loads, tensile cracks at the intersection of the top and joint surface develop into a drawing open surface of the back edge, and a shear slip occurs at the base of the slope, both of which result in the formation of tensile-shear slip failure. Permanent slope displacement accumulates only when seismic acceleration exceeds the critical acceleration. The slope deformation has been constrained, and the performance of the slope during the seismic activity has been strengthened by anchor bolt supports, which significantly increase the ductility of the rock slope under seismic loads. Moreover, during an earthquake, the axial forces of anchor bolts in the middle slope rise more than at any other position. After the earthquake, anchor bolts in the middle have been shown to exhibit maximum axial force. As a complex problem, stability analysis of seismic slopes is important. The analysis of seismic slope failure and the mechanism of slope anchoring are particularly complicated. The present study will help to improve future research on the seismic design and dynamic analysis of slopes supported by anchor bolts.

Keywords


Anchor Bolts, Anti-seismic Effect, Dynamic Res-Ponse, Layered Rock Slope, Seismic Loads.

References





DOI: https://doi.org/10.18520/cs%2Fv124%2Fi9%2F1088-1094