Investigation of pile embedding influence on the slope stability

Abstract

Purpoze. The problem of slope stability assessment and landslide prediction acquire the special actuality in last decades. At present, interest of engineers to the problem of the slope stability is growing in connection with development of the mountainous-folded regions, having rich mineral deposits, development of thoroughfares, elaboration of mines with depth up to hundred meters by open-cut mining, advance of the city infrastructure. The assessment of the stability of natural slopes, as a rule, connected with the construction and exploitation of engineering structures. For the ensuring of the stability and normal exploitation conditions of the structures, interacting with the sliding slopes, the assessment of the given slope, considering the landslide forming factors, is necessary. So, the design model, corresponding to the mechanism of the given sliding process should be chosen for the every instance. The goal of the present work is the investigation of the pile embedding influence on the slope stability, using the numerical experiments. Methodology. For the assessment of the pile embedding influence on the slope stability design model of the uniform system `slope + pile + building under construction is proposed. Findings. As analysis of conducted numerical experiments has shown, the proposed model of slope stability design ensures corresponding change of slope deformation mode even at the small changes in the raw data. Therefore the reliability and credibility of results obtained entirely depends on the preciseness of the data of engineering-geological investigations of the special object under investigation. The analysis of conducted numerical experiments has shown that in complex engineering-geological conditions and in earthquake prone regions, even in case, when the building area, according to construction standards, unfavorable (inclination angle greater than 150) and at cataclinal structure of the slope, the factor of slope stability can be increased up to the value, meeting the standard requirements. Originality. The proposed model „slope + pile+ building under construction“ allows to approximate maximally to the real state: considering the relief, structure, inclination and the soil physical-mechanical properties; structure, geometry and location of foundations; the value of the loading, passing to the foundation, considering the soil physical nonlinearity and seismicity; to examine in the uniform system and assess the slope deformation mode and stability; to select the optimum version of the foundations for the buildings under construction. Practical value. In comparison with the existing standards and empirical dependences, the use of the proposed design model will substantially  improve the preciseness, trustworthiness and reliability of the results obtained for the assessment of the new construction on the slope stability.