Probabilistic Bearing Capacity of a Pavement Resting on Fibre Reinforced Embankment Considering Soil Spatial Variability

Kouseya Choudhuri,Debarghya Chakraborty

doi:10.3389/fbuil.2021.628016

Kouseya Choudhuri, Debarghya Chakraborty

Open Access

https://doi.org/10.3389/fbuil.2021.628016

Copy DOI

Abstract

This paper intends to examine the influence of spatial variability of soil properties on the probabilistic bearing capacity of a pavement located on the crest of a fibre reinforced embankment. An anisotropic random field, in combination with the finite difference method, is used to carry out the probabilistic analyses. The cohesion and internal friction angle of the soil are assumed to be lognormally distributed. The Monte Carlo simulations are carried out to obtain the mean and coefficient of variation of the pavement bearing capacity. The mean bearing capacity of the pavement is found to decrease with the increase in horizontal scale of fluctuation for a constant vertical scale of fluctuation; whereas, the coefficient of variation of the bearing capacity increases with the increase in horizontal scale of fluctuation. However, both the mean and coefficient of variation of bearing capacity of the pavement are observed to be increasing with the increase in vertical scale of fluctuation for a constant horizontal scale of fluctuation. Apart from the different scales of fluctuation, the effects of out of the plane length of the embankment and randomness in soil properties on the probabilistic bearing capacity are also investigated in the present study.

Highlights

Soil reinforced with fibres in optimum quantity is proven to be one of the most efficient and economical means of ground improvement technique over the past few decades
The main objective of this paper is to investigate the effect of soil spatial variability on the performance of a pavement located on the top of the fibre-reinforced embankment
Effect of the out of the Plane Length of the Embankment (Lop) on Probabilistic Bearing Capacity The effect of different Lop on μq and COVq is investigated by considering δx/B δy/B 2 and δz/B 0.5 for both embankment and foundation soil, and COVc 25% for embankment soil only

Summary

Introduction

Soil reinforced with fibres in optimum quantity is proven to be one of the most efficient and economical means of ground improvement technique over the past few decades. Fibre reinforcement improves the unconfined compressive strength and shear strength properties of the soil (Cai et al, 2006; Consoli et al, 2010), it increases the tensile strength (Tang et al, 2016; Cristelo et al, 2017). Many researchers have studied the effectiveness of using synthetic fibre-reinforced soil

Objectives

Results

Conclusion