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10006397
Investigation of Building Loads Effect on the Stability of Slope
Abstract:
In big cities, construction on sloping land (landslide) is becoming increasingly prevalent due to the unavailability of flat lands. This has created a major challenge for structural engineers with regard to structure design, due to the difficulties encountered during the implementation of projects, both for the structure and the soil. This paper analyses the effect of the number of floors of a building, founded on isolated footing on the stability of the slope using the computer code finite element PLAXIS 2D v. 8.2. The isolated footings of a building in this case were anchored in soil so that the levels of successive isolated footing realize a maximum slope of base of three for two heights, which connects the edges of the nearest footings, according to the Algerian building code DTR-BC 2.331: Shallow foundations. The results show that the embedment of the foundation into the soil reduces the value of the safety factor due to the change of the stress state of the soil by these foundations. The number of floors a building has also influences the safety factor. It has been noticed from this case of study that there is no risk of collapse of slopes for an inclination between 5° and 8°. In the case of slope inclination greater than 10° it has been noticed that the urbanization is prohibited.

References:

[1] Sarma SK, 1999, Seismic bearing capacity of shallow strip footings adjacent to a slope, 2nd International Conference on Earthquake Geotechnical Engineering, Publisher: A Balkema Publishers, Pages: 309-313.
[2] Sarma SK, Srbulov M, 1996, A simplified method for prediction of kinematic soil-foundation interaction effects on peak horizontal acceleration of a rigid foundation, Earthquake Engineering & Structural Dynamics, Vol: 25, Pages: 815-836, ISSN: 0098-8847.
[3] Kumar, J. and Rao, V.B.K.M. (2002), Seismic bearing capacity factors for spread foundations. Géotechnique 2002; 52(2):79–88.
[4] Askari F, Farzaneh O, Upper-bound solution for seismic bearing capacity of shallow foundations near slopes. Geotechnique 2003; 53(8):697–702.
[5] Paul, D. K., and Kumar S. (1997). Stability analysis of slope with building loads. Soil Dynamics and Earthquake Engineering 16:(6), 395-405.
[6] Kourkoulis R., Anastasopoulos I., Gelagoti F, and Gazetas G., “Interaction of foundation-structure systems with seismically precarious slopes: numerical analysis with strain softening constitutive model,” Soil Dynamics and Earthquake Engineering, vol. 30, no. 12, pp. 1430–1445, 2010.
[7] DTR-BC 2.331, Document technique réglementaire algérienne « Règles de calcul des fondations superficielles ». 2005.
[8] Brinkgreve R.B.J. 2003. PLAXIS manuel de référence. DELFT, 2003. 90-808079-3-1.
[9] Duncan, J.M. and Wrigth, S.G. (2005) Soil strength and slope stability. John Wiley et Sons, Inc., pp.199.
[10] U.S Army corps of engineers, (2003) Engineer manual. Online available:http://www.usce.army.mil/publications/engmanuals/em1110-2-1902/entire.pdf.
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