Showing papers in "Soils and Foundations in 2018"

TL;DR: In this paper, the effect of adding fly ash (FA) and slag (S) to a soft soil was investigated for usage in deep soil mixing (DSM) applications, where different combinations of FA and S with six combinations of sodium and potassium based liquid alkaline activators (L) were added to the soil to study the effects on its engineering and chemical properties.

TL;DR: In this paper, the use of fly ash (FA) and slag (S) as alternative green binders in ground-improvement projects that would reduce the carbon footprint of these projects was investigated.

TL;DR: In this article, an experimental study on the shear modulus and damping ratio of calcareous and siliceous sands of different origins and their identical grain size distribution and stress-density states was conducted on reconstituted samples of two sands obtained from coastal areas.

TL;DR: In this article, the authors investigated the characteristics of particle breakage using numerous triaxial tests on coral sand and proposed a hyperbolic model to correlate the relative fractal dimension with the relative breakage for use with both monotonic and cyclic tests.

TL;DR: In this article, a soil improvement technique using plant-derived urease-induced calcium carbonate precipitation (PDUICCP) was proposed as an alternative to MICP.

TL;DR: In this article, the results of 90 Unconfined Compressive Strength (UCS) and California Bearing Ratio (CBR) tests on sulfate silty sand stabilized with different lime and microsilica percentages as the two main stabilizers.

TL;DR: In this paper, the interparticle contact evolution of two sheared granular materials, i.e., a spherical glass bead (GB) specimen and an angular Leighton Buzzard Sand (LBS) specimen, is investigated non-destructively using X-ray micro-tomography.

TL;DR: In this paper, the effect of surface roughness on the shear wave velocity and the small-strain stiffness of soils using both laboratory shear plate dynamic tests and discrete element method (DEM) analyses was assessed.

TL;DR: Wang et al. as discussed by the authors proposed a two-stage vacuum preloading method and focused on its feasibility and effectiveness for dredged marine clay fill in Wenzhou land reclamation site in China.

TL;DR: In this paper, a non-stationary random field (RF) model is proposed for the characterization of the spatial variability and the depth-dependent nature of the undrained shear strength of soil.

TL;DR: In this paper, the authors proposed a new theoretical model for predicting both the splitting tensile strength (qt) and the compressive strength (qu) of artificially cemented sand and assessed their ratio for a given material.

TL;DR: In this article, the performance of a 16m deep excavation in sand covered karst in Metro Line no. 9, Guangzhou, China was monitored and evaluated, including lateral wall deflection, vertical wall movement, ground surface settlement, and settlement of adjoining buildings.

TL;DR: This study develops a simplified two-dimensional numerical model that characterizes the pipes as beam-type structures and the surrounding soil as Winkler springs and generates fragility curves for pipelines subjected to transverse PGD for the first time.

TL;DR: In this paper, the effects of surface sand layer density and rainfall intensity on the slop failures due to rainfalls were investigated experimentally, and two types of failure, surface slide failure and retrogressive failure, were observed depending on the rainfall intensity and the surface sand layers density.

TL;DR: In this article, the authors present the results of coupled discrete element (DEM-CFD) simulations of permeameter tests, which highlight the importance of both particle stress and connectivity on the initiation of suffusion.

TL;DR: In this article, the impact of the length of the stiffened core and the strength of the DCM socket on the behaviors of floating stiffened deep cement mixing (SDCM) columns was investigated.

TL;DR: In this article, the bearing capacity of shallow foundations in unsaturated cohesive soils is estimated by simulating the vertical stress versus surface settlement behaviors of shallow foundation extending the modified total stress approach.

TL;DR: In this article, the authors evaluated the influence of the contamination level of the soil, the concentration of citric acid, the contact time, the soil pH, and the ionic interaction on the desorption characteristics of three heavy metals (i.e., Cr(III), Mn(II), and Ni(II)).

TL;DR: In this paper, the effect of geogrid on controlling the stability and settlement of high railway embankments using laboratory testing and finite element modeling was investigated. And the results of their load in terms of settlements were compared.

TL;DR: In this paper, the applicability of a low-carbon, rapid-hardening calcium sulfoaluminate (CSA) cement for an accelerated and sustainable soil treatment is explored.

TL;DR: In this paper, an effective stress-based semi-empirical model was developed to predict the variations in the small strain shear modulus (Gmax) of unsaturated sand during hydraulic hysteresis.

TL;DR: In this article, the authors investigated the behavior of a large-scale foundation pit supported by bored piles and inclined steel struts, in which the movement of the foundation pit and the displacement of the retaining structure are reported.

TL;DR: In this article, the authors carried out a reconnaissance of Mexico City, and some locations in the states of Puebla and Morelos, to identify the affected areas and the extent of damage.

TL;DR: In this paper, the authors investigated the mechanical behavior of CO2-hydrate-bearing sand and showed that the strength and dilatancy of the CO2 hydrate sand is higher than water-saturated sand under undrained conditions.

TL;DR: In this article, the authors used direct shear test simulations of 3D, non-spherical particles with different void ratio distributions to characterize their dilatancy and ductility.

TL;DR: In this paper, a series of centrifuge model tests under different vertical-horizontal combined loading conditions was performed to investigate the influence rules and mechanism of the combined loads on the response of piles in sand.

TL;DR: In this article, the authors summarized the recent research on the effects of interface roughness, soil density, particle shape, and friction coefficient on interface behavior and strength, and simulated granular-continuum interface shear using the three-dimensional discrete element method (DEM).

TL;DR: In this paper, a set of hyperbolic constitutive models were developed to fit the experimental data at different stress paths and the stress-strain strength characteristics and the deformation parameters were determined for these tests.

TL;DR: In this paper, the durability of RAP when blended with crushed rock (CR) and stabilized with Portland cement was investigated, and the compaction curves of cement-stabilized RAP/CR blends were found to be essentially the same for all cement contents, but different for unstabilized blends.

TL;DR: In this paper, a series of 1-g shaking table tests was performed on five reduced-scale reinforced soil wall models to investigate the influence of the peak acceleration, the loading duration, and the strip length on the dynamic behavior of steel-strip reinforced soil walls, in terms of the dynamic reinforcement load distribution and the dynamic lateral earth pressure behind the surface.