Numerical evaluation of stability and deformability of earth embankment structure by replacing weak soil on weak foundations
https://doi.org/10.31660/2782-232X-2024-3-74-85
Abstract
A pressing issue for the railway industry is to enhance the stability and reduce the deformability of earth embankment structures constructed on weak foundations using the method of replacing weak soil. The authors determined the width of the weak soil at the base, requiring replacement, taking into account the requirements for deformability indicators that ensure the specified geometric parameters of the earth embankment under various soil foundation conditions. The numerical modeling was based on established theoretical principles in accordance with the sequence of construction stages for a high-speed railway line on weak foundations using the geotechnical software Plaxis 2D. By considering and evaluating different thicknesses of the weak soil layer to be replaced, the authors constructed a graph of the dependence of deformation on the principal stress at the point of plastic deformation development, and determined the value of the stable safety factor. The research made it possible to propose a numerical method for determining the slope stability coefficient. Analysis of current regulatory documents and calculation methods for earth structures on weak soils has confirmed the need to refine existing calculation methods
Keywords
numerical assessment,
strength,
deformability,
stability coefficient,
slope stability,
earth embankment,
weak clay soils,
road construction,
high-speed railway,
Plaxis 2D
Supporting agencies: The authors express their gratitude to JSC "Mosgiprotrans" (Moscow, Russian Federation) for providing the initial data and assistance in conducting the research.
About the Authors
Trung Hieu Lе
Russian University of Transport (MIIT)
Russian Federation
Russian Federation
Trung Hieu Lе, Postgraduate in the Department of Automobile Roads, Airfields, Bases and Foundations
Moscow
Xuan Hung Ngo
Hanoi University of Mining and Geology
Viet Nam
Viet Nam
Xuan Hung Ngo, Cand. Sci. (Engineering), Lecturer in the Faculty of Civil Engineering
Hanoi
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For citations:
Lе T., Ngo X. Numerical evaluation of stability and deformability of earth embankment structure by replacing weak soil on weak foundations. Architecture, Construction, Transport. 2024;(3):74-85. (In Russ.) https://doi.org/10.31660/2782-232X-2024-3-74-85
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