Abstract
Cut slope surfaces are affected by excavation activities and weathering agents. Disturbances on the surface can penetrate down to a certain depth. Slope stability analyses made on the cut slopes can reveal unsatisfactory results unless the disturbance depth is determined. Moreover, false designs ignoring the shear strength parameter differences of inner and surface sections of the slopes can affect the safety of the highways. Disturbance thickness due to blasting effect is already presented in the literature; however, the mechanical excavation is still unknown. In this study the effect of mechanical excavation on disturbance thickness is investigated by using 54 cut slopes selected from Western Black Sea Region of Turkey. According to UCS results, the strength values of the undisturbed zones are found to be two times higher than the disturbed zones. The disturbance depths formed by excavation and weathering are found to be changing between 0.05 and 0.50 m on the cut slopes. Regarding the height (H) of the slopes, disturbance thickness is found to be affecting the slope up to 0.06 H which is lower than the blasting effect. It is recommended that this thickness should be taken into consideration when assigning the disturbance factor (D) and used to prevent stability problems of the cut slopes.
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References
Bar N, Barton N (2016) Empirical slope design for hard and soft rocks using Q-slope. In: Proceedings of the 50th US rock mechanics/geomechanics symposium, ARMA 2016, Houston, 26–29 June 2016, ARMA, pp 16–384
Bar N, Barton N, Ryan CA (2016) Application of the Q-slope method to highly weathered and saprolitic rocks in Far North Queensland. In: Ulusay R et al (eds) Rock mechanics and rock engineering: from the past to the future; Proceedings of the ISRM international symposium, Eurock 2016, Cappadocia, 29–31 August 2016, pp 585–590
Bar N, Barton N (2017) The Q-slope method for rock slope engineering. Rock Mech Rock Eng 50:3307–3322. https://doi.org/10.1007/s00603-017-1305-0
Barton N, Grimstad E (2014) Forty years with the Q-system in Norway and abroad, vol 4.1 4.25. Fjellsprengningsteknikk, Bergmekanikk, Geoteknikk, NFF, Oslo
Barton N, Bar N (2015) Introducing the Q-slope method and its intended use within civil and mining engineering projects. In: Schubert W, Klunckner A (eds) Future development of rock mechanics; Proceedings of the ISRM regional symposium, Eurock 2015 and 64th Geomechanics colloquium, Salzburg, 7–10 October 2015, pp 157–162. https://doi.org/https://doi.org/10.13140/RG.2.2.23298.79042
Bieniawski ZT (1989) Engineering rock mass classifications. Wiley, New York
Bilgin N, Copur H, Balci C, Tumac D (2018) Strength, cuttability, and workability of coal. 248 pp. CRC Press, Boca Raton
BS5930 (1981) Code of practice for ground investigations. British Standards Institute, London
Cai J, Yan E, Yeh T, Zha Y, Liang Y, Huang S, Wang W, Wen J (2017) Effect of spatial variability of shear strength on reliability of infinite slopes using analytical approach. Comput Geotech 81:77–86. https://doi.org/10.1016/j.compgeo.2016.07.012
Casale M, Oggeri C, Peila D (2008) Improvements of safety conditions of unstable rock slopes through the use of explosives. Nat Hazard 8:473–481. https://doi.org/10.5194/nhess-8-473-2008
Dawson EM, Roth WH, Drescher A (1999) Slope stability analysis by strength reduction. Geotechnique 49:835–840. https://doi.org/10.1680/geot.1999.49.6.835
Duncan JM (1996) State of the art: limit equilibrium and finite-element analysis of slopes. J Geotech Eng 122:577–596. https://doi.org/10.1061/(ASCE)0733-9410(1996)122:7(577)
Ersöz T, Topal T (2018a) Weathering and excavation effects on the stability of various cut slopes in flysch-like deposits. Geotech Geol Eng. https://doi.org/10.1007/s10706-018-0566-z
Ersöz T, Topal T (2018b) Assessment of rock slope stability with the effects of weathering and excavation by comparing deterministic methods and slope stability probability classification (SSPC). Environ Earth Sci 77:547. https://doi.org/10.1007/s12665-018-7728-4
Forcellini D, Tanganelli M, Viti S (2018) Response site analyses of 3D homogeneous soil models. Emerg Sci J 2(5):238–250. https://doi.org/10.28991/esj-2018-01148
Gao W, Zhuo Z, Hou B, Chen N (2011) Road high cutting slope stability analysis under the influence of blasting for excavation. Adv Mater Res 250–253:3163–3167. https://doi.org/10.4028/www.scientific.net/AMR.250-253.3163
Hack R (1998) Slope stability probability classification; SSPC; 2nd version. University of Technology Delft; International Institute for Aerospace Survey and Earth Sciences; ITC, Delft, Enschede, The Netherlands
Han YC (2019) Case study of slope deterioration characteristics: Simbal Landslide, Salt Range. Pakistan Environ Earth Sci 78:286. https://doi.org/10.1007/s12665-019-8272-6
Hoek E (1994) Strength of rock and rock masses. ISRM News J 2:4–16
Hoek E (2012) Blast Damage Factor D. Technical note for RocNews. February 2, 2012 Winter Issue
Hoek E, Carranza-Torres CT, Corkum B (2002) Hoek-Brown failure criterion-2002 edition. In: Proceedings of the fifth North American rock mechanics symposium, Toronto, Canada, 1, pp 267–273
Hu YG, Liu MS, Wu XX, Zhao G, Li P (2018) Damage-vibration couple control of rock mass blasting for high rock slopes. Int J Rock Mech Mining Sci 103:137–144. https://doi.org/10.1016/j.ijrmms.2018.01.028
Hutchinson DJ, Diederichs MS (1996) Cable bolting in underground mines. 406 pp. Richmond, British Columbia, Canada: BiTech Publishers
ISRM (1981) Suggested methods for determining hardness and abrasiveness of rocks. In: Rock characterization, testing and monitoring: ISRM suggested Methods. Pergamon, Oxford, pp.95–96
Johari A, Lari AM (2017) System probabilistic model of rock slope stability considering correlated failure modes. Comput Geotech 81:26–38. https://doi.org/10.1016/j.compgeo.2016.07.010
Lai X, Cai M, Ren F, Xie M, Esaki T (2006) Assessment of rock mass characteristics and the excavation disturbed zone in the Lingxin Coal Mine beneath the Xitian river, China. Int J Rock Mech Min Sci 43:572–581. https://doi.org/10.1016/j.ijrmms.2005.10.005
Lacasse S, Nadim F (1997) Uncertainties in characterising soil properties. Norwegian Geotech Institute 201:49–75
Li AJ, Merifield RS, Lyamin AV (2011) Effect of rock mass disturbance on the stability of rock slopes using the Hoek-Brown failure criterion. Comput Geotech 38:546–558. https://doi.org/10.1016/j.compgeo.2011.03.003
Li D, Xiao T, Cao Z, Phoon K, Zhou C (2016) Efficient and consistent reliability analysis of soil slope stability using both limit equilibrium analysis and finite element analysis. Appl Math Model 40:5216–5229. https://doi.org/10.1016/j.apm.2015.11.044
Li J, Leao TF (2018) Application of Nor Sand constitutive model in a highway fill embankment slope stability failure study. Civil Eng J 4(10):2252–2263. https://doi.org/10.28991/cej-03091155
Li S, Feng X, Li Z, Zhang C, Chen B (2012) Evolution of fractures in the excavation damaged zone of a deeply buried tunnel during TBM construction. Int J Rock Mech Min Sci 55:125–138. https://doi.org/10.1016/j.ijrmms.2012.07.004
Marinos V (2017) A revised, geotechnical classification GSI system for tectonically disturbed heterogeneous rock masses, such as flysch. Bull Eng Geol Env. https://doi.org/10.1007/s10064-017-1151-z
Marinos P, Hoek E (2001) Estimating the geotechnical properties of heterogeneous rock masses such as Flysch. Bull Eng Geol Env 60:85–92. https://doi.org/10.1007/s100640000090
Marinos V, Carter TG (2018) Maintaining geological reality in application of GSI for design of engineering structures in rock. Eng Geol 239:282–297. https://doi.org/10.1016/j.enggeo.2018.03.022
Marques EAG, Williams DJ, Assis IR, Leao MF (2017) Effects of weathering on characteristics of rocks in a subtropical climate: weathering morphology, in situ, laboratory and mineralogical characterization. Environ Earth Sci 76:602. https://doi.org/10.1007/s12665-017-6936-7
Melentijevic S, Serrano A, Olalla C, Galindo RA (2017) Incorporation of non-associative flow rules into rock slope stability analysis. Int J Rock Mech Min Sci 96:47–57. https://doi.org/10.1016/j.ijrmms.2017.04.010
Miscevic P, Vlastelica G (2014) Impact of weathering on slope stability in soft rock mass. J Rock Mech Geotech Eng 6:240–250. https://doi.org/10.1016/j.jrmge.2014.03.006
Nicholson DT, Hencher S (1997) Assessing the potential for deterioration of engineered rock slopes. In: Proceedings of the IAEG symposium, Athens, pp 911–917
Özköse M (2019) Assessment of cut slope stability in Western Black Sea Region (Turkey). Master Thesis, Middle East Technical University, Ankara
Priest SD (1993) Discontinuity analysis for rock engineering. Chapman & Hall, London
Reale C, Xue J, Pan Z, Gavin K (2015) Deterministic and probabilistic multi-modal analysis of slope stability. Comput Geotech 66:172–179. https://doi.org/10.1016/j.compgeo.2015.01.017
Rocscience (2011) Slide 6.009–2D limit equilibrium slope stability analysis
Rodriguez-Losada JA, Hernandez-Gutierez LE, Lomoschitz Mora-Figueroa A (2007) Geotechnical features of the welded ignimbrites of the Canary Islands. In: Malheiro AM, Nunes JC (eds) Volcanic rocks. Taylor & Francis, London, pp 29–33. https://doi.org/https://doi.org/10.1201/NOE0415451406.ch4
Romana M (1985) New adjustment rating for application of the Bieniawski classification to slopes. Proceeding of international symposium on rock mechanics, mining civil works ISRM. Zacatecas, Mexico, pp 59–63
Ross DG, Reeves GM (1995) Study of the effect of excavation technique on rock slope stability and slope maintenance costs at two locations in Scotland. Eng Geol Construct 10:369–376
Sheng Q, Yue ZQ, Lee CF, Tham LG, Zhou H (2002) Estimating the excavation disturbed zone in the permanent shiplock slopes of the Three Gorges Project, China. Int J Rock Mech Min Sci 39:165–184. https://doi.org/10.1016/S1365-1609(02)00015-1
Singh A (2004) FRHI—a system to evaluate and mitigate rockfall hazard in stable rock excavations. J Inst Eng India Civil Eng Div 85:62–75
Song Y, Xue H, Meng X (2019) Evaluation method of slope stability based on the Qslope system and BQ method. Bull Eng Geol Env. https://doi.org/10.1007/s10064-019-01459-5
Tran TV, Alkema D, Hack R (2019) Weathering and deterioration of geotechnical properties in time of groundmasses in a tropical climate. Eng Geol 260:105221. https://doi.org/10.1016/j.enggeo.2019.105221
Vlastelica G, Miščević P, Pavić N (2016) Testing the shear strength of soft rock at different stages of laboratory simulated weathering. Građevinar 68:955–966. https://doi.org/10.14256/JCE.1878.2016
Vlastelica G, Miscevic P, Cvitanovic NS (2018) Durability of soft rocks in Eocene flysch formation (Dalmatia, Croatia). Eng Geol 245:207–217. https://doi.org/10.1016/j.enggeo.2018.08.015
Wang Y, Lin H, Zhao Y, Li X, Guo P, Liu Y (2019) Analysis of fracturing characteristics of unconfined rock plate under edge-on impact loading. Eur J Environ Civ Eng 22:1–16. https://doi.org/10.1080/19648189.2018.1509021
Xiao P, Gao W, Hou B, Chen N (2012) Cutting stability analysis under the influence of blasting. Appl Mech Mater 170–173:3035–3040. https://doi.org/10.4028/www.scientific.net/AMM.170-173.3035
Zheng H, Li T, Shen J, Xu C, Sun H, Lü Q (2018) The effects of blast damage zone thickness on rock slope stability. Eng Geol 246:19–27. https://doi.org/10.1016/j.enggeo.2018.09.021
Zohair M, Mangnejo DA, Mangi N (2019) Analysis for stabilization of soil slope in silty soil with replacement of soil cement. Civil Eng J 5(10):2233–2246. https://doi.org/10.28991/cej-2019-03091407
Zuo J, Shen J (2020) The effects of blast damage zone thickness on rock slope stability. In: The Hoek-Brown Failure criterion-From theory to application. Springer, Singapore. https://doi.org/https://doi.org/10.1007/978-981-15-1769-3_12
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The authors would like to thank METU BAP Unit who supported this paper. We would like to thank the anonymous reviewers and the associate editor for their constructive and valuable comments.
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This work was supported by METU BAP project “BAP-03–09-2016–001”.
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Ersöz, T., Özköse, M. & Topal, T. Effect of disturbed zone thickness on rock slope stability. Nat Hazards 108, 1919–1942 (2021). https://doi.org/10.1007/s11069-021-04762-1
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DOI: https://doi.org/10.1007/s11069-021-04762-1