International Journal of Geomechanics: Recent submissions
Now showing items 2541-2560 of 4049
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Distinct Element Simulations of Shear Rupture in Dilatant Granular Media
(American Society of Civil Engineers, 2018)The development of shear rupture in granular media due to boundary deformation was captured using the distinct element method (DEM). Assemblages of nonspherical, three-dimensional particles undergoing direct shear test ... -
Quantifying Microstructural Damage of Sandstone after Hydrochemical Corrosion
(American Society of Civil Engineers, 2018)Rock microstructure changes after hydrochemical reactions, which, in turn, leads to deterioration of mechanical properties. Thus, a quantification study on rock microstructural damage after chemical corrosion is necessary. ... -
Shaking Table Investigation of Effects of Inclination Angle on Seismic Performance of Micropiles
(American Society of Civil Engineers, 2018)This paper aims to experimentally study the performance of inclined micropiles under dynamic loading conditions. Analysis is performed using data obtained from shaking table tests on a small-scale physical model of micropiles ... -
Comparison of Factors of Safety Using a 3D Failure Mechanism with Kinematic Approach
(American Society of Civil Engineers, 2018)In slope stability analysis, there are two commonly used methods for calculating the factors of safety (FS). The first is the strength reduction method (SRM), which defines the FS as the ratio of the real material shear ... -
Effect of Dewatering in a Confined Aquifer on Ground Settlement in Deep Excavations
(American Society of Civil Engineers, 2018)Dewatering must be conducted for shallow confined aquifers located below deep excavations. However, its effects on ground settlement remain unclear, due to the complicated seepage and stress condition of the strata. In ... -
Explicit Discontinuous Deformation Analysis Method with Lumped Mass Matrix for Highly Discrete Block System
(American Society of Civil Engineers, 2018)In the traditional discontinuous deformation analysis (DDA) method, the implicit time integration scheme is used to integrate equations of motion for modeling the mechanical behavior of a highly discrete rock block system. ... -
Spatial Estimation of Material Parameters and Refined Finite-Element Analysis of Rockfill Dam Based on Construction Digitization
(American Society of Civil Engineers, 2018)Quality levels for rockfill dam compaction (herein, porosity is an important index for assessing dam-material compaction quality) in any location can be estimated based on construction digitization technologies. According ... -
Liquefaction of Level Ground Unsaturated Sand Deposits Using a Validated Fully Coupled Analysis Procedure
(American Society of Civil Engineers, 2018)Liquefaction of unsaturated sands has been observed in laboratory tests and in the field. A comprehensive investigation of unsaturated sand deposits subjected to seismic loading, especially using validated computational ... -
Modeling Field Injectivity Tests and Implications for In Situ Stress Determination
(American Society of Civil Engineers, 2018)Knowledge of underground stresses (e.g., minimum horizontal stress) is vital for many aspects of oil and gas development, such as wellbore stability evaluation, lost-circulation prediction, casing design, hydraulic-fracturing ... -
Anisotropic Permeability of Coal Subjected to Cyclic Loading and Unloading
(American Society of Civil Engineers, 2018)An experimental investigation on the anisotropic permeability of coal under cyclic loading and unloading conditions is presented in this article. The results show that coal permeability decreases with increasing hydrostatic ... -
Quantitative Estimates of Non-Darcy Groundwater Flow Properties and Normalized Hydraulic Aperture through Discrete Open Rough-Walled Joints
(American Society of Civil Engineers, 2018)This study aimed to understand the behavior of non-Darcy water fluid flow through a single joint in rock. Water flow tests through three splitting mated granite joints with natural characteristics were conducted beyond the ... -
Effect of Grout on Mechanical Properties and Cracking Behavior of Rock-Like Specimens Containing a Single Flaw under Uniaxial Compression
(American Society of Civil Engineers, 2018)To investigate the influence of the geometry of a fracture and grouting on failure behaviors and mechanical properties of rock masses, uniaxial compressive tests were conducted on rock-like specimens containing single ... -
Uplift Failure Mechanisms of Pipes Buried in Dense Sand
(American Society of Civil Engineers, 2018)This study conducted finite-element (FE) modeling of uplift resistance from dense backfill sand. The prepeak hardening, postpeak softening, density, and confining-pressure-dependent soil behavior were implemented in FE ... -
Review of the Relationships between Crack Initiation Stress, Mode I Fracture Toughness and Tensile Strength of Geo-Materials
(American Society of Civil Engineers, 2018)It has been accepted that, in geo-materials, almost all the cracks forming at final failure in the tension test and those occurring at the crack initiation (CI) and crack propagation stages in the compression test are ... -
Upper-Bound Finite-Element Analysis of Characteristics of Critical Settlement Induced by Tunneling in Undrained Clay
(American Society of Civil Engineers, 2018)An interesting operation has been developed to estimate the critical normalized surface settlement for shallow tunnels in undrained clay (idealized as a homogeneously Tresca material). The upper-bound finite-element method ... -
Improved Calculation Method of Super-Long Pile in Deep Soft Soil Area
(American Society of Civil Engineers, 2018)The exertion of super-long pile skin friction is an asynchronous process in deep soft soil area. The limitation of skin friction on the upper part of pile is much smaller than the lower part of pile. The softening of ... -
Improved Synchronous and Alternate Vacuum Preloading Method for Newly Dredged Fills: Laboratory Model Study
(American Society of Civil Engineers, 2018)Cost effectiveness is a major factor in most vacuum preloading projects, considering the significantly reduced time allotted to achieve a relatively high degree of consolidation. However, the shallow base and deep layer ... -
Effect of Seismic Soil–Pile–Structure Interaction on Mid- and High-Rise Steel Buildings Resting on a Group of Pile Foundations
(American Society of Civil Engineers, 2018)A series of numerical simulations were carried out on two types of superstructures and six types of piled raft foundations to investigate the effects of seismic soil–pile–structure interaction (SSPSI) on the seismic responses ... -
Adaptive Constitutive Soil Modeling Concept in Mechanized Tunneling Simulation
(American Society of Civil Engineers, 2018)This paper proposes an innovative concept of adaptive constitutive soil modeling to optimize the complexity of the numerical simulation of shield tunneling. This concept involves the use of an adequate constitutive model ... -
Numerical Estimation of Suitable Gob-Side Filling Wall Width in a Highly Gassy Longwall Mining Panel
(American Society of Civil Engineers, 2018)Determining a suitable width of gob-side filling wall (GFW) is a major concern in the application of gob-side entry retaining (GER) technology in highly gassy coal mines. This paper presents a workflow for GFW width design ...