Analysis of Slope Creep in the Example of a Landslide Slope in Koronowo near Bydgoszcz

• Autorzy: Zabuski L.

Identyfikatory

DOI

10.1515/heem-2018-0001

• Języki publikacji: EN

Abstrakty

EN

This paper presents the results of a numerical simulation of a slope deformation process. The landslide slope “Grabina” inKoronowo near Bydgoszcz (Poland) serves as an example.Aslope profile located in the central part of the slope, between the main scarp and the toe of the landslide, was selected. The average dip of the slope is about 10, and its length is approximately 55 m. Elasticity, plasticity and viscosity properties were taken into account in the model of the soil mass that composes the slope. The visco-elastic properties are described by the Burgers model (Mainardi and Spada 2011), and the plastic ones by the Coulomb-Mohr law.Anumerical simulation was carried out by the computer code FLAC2D in the plane strain state with the assumption of the Lagrange routine. The model was discretized taking into account the results of inclinometric measurements, which proved that the slide movement was concentrated in a narrow loam zone of 0.5–1.0 m thickness. No tests of the viscosity parameters were performed, so they were determined by the back analysis and a trial and error method. The calculation results were verified by comparison with the displacement measured by the inclinometric method in three boreholes. The analysis performed demonstrated the possibility of approximating and forecasting landslide displacements by the combined Burgers and Coulomb-Mohr models.

Słowa kluczowe

EN

landslide; creep; inclinometric measurements; Burgers model

• Wydawca: Institute of Hydro-Engineering of Polish Academy of Sciences
• Czasopismo: Archives of Hydro-Engineering and Environmental Mechanics
• Rocznik: 2018
• Tom: Vol. 65, nr 1
• Strony: 3--10
• Opis fizyczny: Bibliogr. 13 poz., rys., tab.

Twórcy

autor

Zabuski L.

• Institute of Hydro-Engineering, Polish Academy of Sciences, Kościerska 7, 80-953 Gdańsk, Poland

Bibliografia

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• Itasca C. G. (2000) FLAC 4.0 Manual, Minneapolis, USA.
• Ito H. (1983) Creep of Rock Based on Long-Term Experiments, Proc. 5th Int. Congr. Rock Mech., Melbourne, Vol. 1, A117–A120.
• Ito H. (1991) On Rheological Behaviour of In Situ Rock Based on Long-TermCreep Experiments, Proc. 7th Int. Congr. Rock Mech., Aachen, Vol. 1, 265–268.
• Ito H. (1993) The Phenomenon and Examples of Rock Creep, [in:] J. A. Hudson (ed.), Comprehensive Rock Engineering. Principles, Practice and Projects, Vol. 3, 693–708.
• Jaeger J. C. (1969) Elasticity, Fracture and Flow, Menthuen & Co. Ltd. and Science.
• Langer M. (1979) Rheological Behaviour of Rock Masses, Proc. 4th Int. Congr. Rock Mech., Montreux, Vol. 3, 29–62.
• Mainardi F., Spada G. (2011) Creep, Relaxation and Viscosity Properties for Basic Fractional Models in Rheology, The European Physical Journal, Special issue: Perspectives on Fractional Dynamics and Control, Eds. Changpin Li, Francesco Mainardi, Vol. 193, 133–160.
• Passaris E. (1979) The Rheological Behaviour of Rocksalt as Determined in an In Situ Pressurized Test Cavity, Proc. 4th Int. Congr. Rock Mech., Montreux, Vol. 1, 257–264.
• Sun G., Zhou R. (1983) The Structural Effect in the Mechanical Behaviour of Clay Shale, Proc. 5th Int. Congr. Rock Mech., Melbourne, Vol. 1, A153–A155.
• Tan Tjong Kie (1993) The Importance of Creep and Time-dependent Dilatancy as Revealed from Case Records in China, [in:] J. A. Hudson (ed.), Comprehensive Rock Engineering. Principles, Practice and Projects, Vol. 3, 709–744.
• Zabuski L. (2003) Długookresowe zachowanie sie tunelu w masywie fliszowym, Materiały Międzynarodowej Konferencji “Budownictwo Podziemne 2003”, AGH Kraków, 641–647 (in Polish).
• Zabuski L., Świdziński W., Kulczykowski M., Mrozek T., Laskowicz I. (2015) Monitoring of landslides in the Brda river valley in Koronowo (Polish Lowlands), Environmental Earth Sciences, 73, 8609–8619.

Uwagi

Opracowanie rekordu w ramach umowy 509/P-DUN/2018 ze środków MNiSW przeznaczonych na działalność upowszechniającą naukę (2019).