Showing papers in "Soils and Foundations in 2020"

TL;DR: In this article, the authors investigate the durability and shear responses of MICP treated slope soil, demonstrating the feasibility of the technique as a potential alternative for slope soil stabilization, and demonstrate that contact cementation provides additional resistive forces in slope soil against progressive expansion of pore water during FT; however, aggregate stability is attributed to adequate cementation level which facilitates effective particle contacts.

TL;DR: In this article, a study was conducted to stabilize An Nafud desert sand against wind-induced erosion employing enzyme-induced carbonate precipitation (EICP) assisted by a sodium alginate (SA) biopolymer.

TL;DR: In this article, the authors determined the dominant CaCO3 distributions in pore space and investigated the effects of these distributions on the small-strain stiffness (measured by S-and P-wave velocities) and permeability of MICP-treated sands.

TL;DR: In this article, the influence of lime sludge, a byproduct of the paper industry, on the index properties of expansive clays was investigated, including their compaction characteristics, stress-strain behaviors at different curing periods and CBRs.

TL;DR: In this article, the results of the preliminary field investigations carried out by the authors' team are summarized and the likely fundamental mechanisms of the long-distance flow-slide are discussed.

TL;DR: In this article, the authors investigated and identified the mechanisms by which a remolded expansive soil can be modified to reduce the upward pressure and swelling (heave) of pavement structures constructed on the expansive soil subgrade.

TL;DR: In this article, the authors explored the potential of an evolutionary algorithm, i.e., genetic algorithm (GA), and a hybrid intelligent approach combining neural network with GA (ANN-GA), to estimate the resilient modulus (Mr) of cohesive pavement subgrade soils.

TL;DR: In this article, the influence of dry-wet cycles on the damage characteristics was investigated on saline loess specimens by infiltrating sodium sulfate solution with different preset concentrations, and the predictive model for damage degree based on the porosity equation was obtained.

TL;DR: In this paper, the influence of marble dust for improving the geotechnical behavior of expansive soil and to understand the interactive mechanism is clarified. But no significant attempt has been made to use marble dust, a waste product resulting from the quarrying and crushing of marble, to determine its potential utilization as a geo-material.

TL;DR: In this article, a low-cost technique has been developed and described using a mixture of tire chips and gravel as the horizontal reinforcing inclusion under the foundation of residential houses, which is used to prevent vibrationinduced and liquefaction-induced damage to residential buildings during earthquakes.

TL;DR: A site investigation conducted at Sibalaya, one of the sites where massive ground flows were observed, revealed the time sequence of the event, including the main shaking that was followed by a sudden drop of the ground surface, the time at which the massive ground flow was initiated (with an extremely loud sound), as well as the change in the water level of wells.

TL;DR: In this paper, the bearing capacity of a rigid footing on the free surface of uniform sandy and clayey soils under the action of eccentric and inclined loading using a finite element analysis by assuming that the soils follow the Drucker-Prager yield function.

TL;DR: In this article, the authors proposed a method to estimate the threshold fine content and the minimum void ratio for sand-silt mixtures at various contents of non-cohesive fines incorporating both parameters.

TL;DR: In this article, the results of two different numerical approaches are compared: (i) a macromechanical continuum approach with the two-phase double-point Material Point Method (MPM) and (ii) a micromachanical approach with Discrete Element Method coupled with the Lattice Boltzmann Method (DEM-LBM), with the objective of highlighting potentialities and critical points of the two approaches.

TL;DR: In this article, the thermal characteristics of a cast-in-place pile foundation in a warm (>−1°C) permafrost region on the interior QTP were studied via field observations and numerical simulations.

TL;DR: In this article, the authors used a triaxial apparatus equipped with planar piezoelectric transducers to monitor the evolution of shear wave velocity (Vs) and the small-strain shear modulus.

TL;DR: In this article, a new method to model the abrasion of granular particles using the discrete element method is demonstrated in simulations of railway ballast using realistically-shaped particles, which are compared to experimental data.

TL;DR: In this article, the contribution of non-plastic fines to the development of seepage-induced internal instability and its impact on the undrained mechanical response of gap-graded sands was investigated.

TL;DR: In this article, a method is proposed for determining the parameters of a two-dimensional DEM simulation in order to consider the soil mechanical characteristics for the problem of rockfall impacts on a sand cushion.

TL;DR: In this paper, the authors investigated the contact erosional behavior of the dispersive embankment layer placed on granular materials and showed that the dispersion and contact erosion tests results indicated that there was a very good correlation between dispersivity potential and some contact erosion assessment parameters, such as void ratio, collected eroded soil and settlement.

TL;DR: In this article, the authors proposed a numerical framework to simulate the deployment of an FFP device in dry sands using the Material Point Method (MPM) and a moving mesh technique is used to ensure the accurate geometry of the FFP devices throughout the calculation, and the soil-FFP interaction is modelled with a frictional contact algorithm.

TL;DR: In this article, the role of initial flaws on the particle breakage behavior is investigated in a DEM modeling approach, where the authors use the realistic fracture surfaces obtained from the experiment as a basis for generating initial flaws in DEM in a statistical way.

TL;DR: In this paper, particle-scale responses of non-cohesive granular soils to the development of soil arching using spherical glass beads and two types of sandy soil were investigated.

TL;DR: In this article, the degradation of compacted bentonite-sand mixtures after suffering desiccation increases the hydraulic conductivity of clay barriers, posing risks to the environment, and compaction constrained the permeability of the mixtures and resulted in the delay in evaporation and shrinkage of the CBSMs' internal parts.

TL;DR: In this article, the compressive bearing capacity of pre-bored grouted planted (PGP) and bored piles embedded in deep soft clay was investigated. But the compressed bearing capacity was not compared to the one of 1000mm bored pile.

TL;DR: In this paper, modified 1D consolidation cells were developed to replicate deep mixed columns in the field when subjected to varying stresses at various depths, and the authors evaluated the effects of geostatic stresses on the compressibility and strength development of submerged geopolymer stabilized columns.

TL;DR: In this article, the mechanism of this geo-disaster was clarified through detailed investigations, and the stability of the large number of earth-fill dams in the Setouchi area is very important.

TL;DR: In this article, a brief overview on current design code practice as well as other proposed methods for the prediction of accumulated deflections or rotations is given. And the results of a systematic model test study dealing with the response of monopiles to lateral cyclic loading in medium dense sand at different cyclic load ratios, load eccentricities and pile embedment lengths are described and evaluated.

TL;DR: In this paper, a continual field investigation was carried out in the Southern Tanglha Region (STR) to examine the types of damage and the development characteristics of the affected embankments.

TL;DR: In this article, the authors proposed a procedure for the calibration of a simplified pore water pressure model implemented in 1D effective stress dynamic analyses based on the cyclic strength of the soils as quantified using empirical correlations with in-situ tests, CPT and SPT.