TL;DR: In this article, a new analytical method is proposed that uses a Timoshenko beam to simulate jointed shield tunnel responses when subjected to an adjacent excavation, which can consider both the bending and shearing effects of a shield tunnel.

TL;DR: In this article, the effect of in-situ stresses on the fracturing of rock due to blasting was investigated, and a theoretical model was used to explain the effect mec....

TL;DR: In this article, a numerical approach using the bonded-particle model (BPM) is adopted to investigate the acoustic emission characteristic of rock under different compressive loading rates, and it reveals that under uniaxial compressive test, the physical mechanism and distribution of AE events recorded by the BPM are generally consistent with the phenomena observed from the laboratory experiments.

TL;DR: In this article, uniaxial compression tests were conducted on granite specimens containing three non-coplanar holes and the relationships between the stress, acoustic emission (AE) and crack evolution process were analyzed using AE measuring and photographic monitoring techniques.

TL;DR: In this article, a fully coupled 3D hydro-mechanical model with real porous seepage is presented for simulating hydraulic fracturing, which can capture crack initiation and propagation, and the fluid pressure evolution during hydraulic fracturing.

TL;DR: In this article, the authors proposed a series of simple equations to calculate the head difference at the two sides of waterproof curtain, and the proposed equation was applied to a field case to verify the validity of the proposed approach.

TL;DR: In this article, a fully coupled, hydro-mechanical (HM) formulation for finite-discrete element method computer code is presented, where fluid flow is assumed to occur through the same triangular mesh used for the mechanical calculations.

TL;DR: In this article, a hybrid finite-discrete element method (FEM-DEM) is implemented to simulate rock fracture and resultant fragment muck-piling in various blasting scenarios.

TL;DR: In this paper, a coupled model that simultaneously considers the pore seepage of a rock matrix and the fracture seepages is proposed to simulate three-dimensional hydraulic fracturing, which appropriately takes into account the fluid leak-off into the surrounding rock matrix from the fracture.

TL;DR: In this paper, the main features of the hydromechanical behaviour of COx claystone were discussed and a series of laboratory test results (triaxial compression and creep tests) provided model development teams with a coherent database for calibration and validation.

TL;DR: In this article, an approximate closed-form solution was proposed for three-dimensional undrained tunnel face stability in clays with constant or linearly increasing shear strength profiles with depth.

TL;DR: In this paper, a series of two-dimensional and three-dimensional finite element analyses using the Hardening Soil (HS) model were carried out to investigate the influences of soil properties, wall stiffness, excavation length, excavation depth, clay thickness at the base of the excavation and wall embedment depth, on the maximum wall deflection induced by braced-excavation.

TL;DR: In this paper, the influence of a flaw on crack initiation, the failure mode, deformation field and energy mechanism of the rock-like material under uniaxial compression was investigated, and the results of laboratory test and numerical simulation demonstrate the flaw inclination effect can be classified into three groups: 0-30°, 30-60° and 75-90°.

TL;DR: In this article, a modified smooth-joint contact model (MSJCM) is proposed to model the non-linear behavior of the joint closure varying with the joint normal stress, which leads to a slightly softer joint.

TL;DR: In this article, a geomechanical model for hydrate bearing sediments is presented, which incorporates the concept of partition stress, plus a number of inelastic mechanisms proposed to capture the complex behavior of this type of soil.

TL;DR: In this article, the authors evaluate the reliability of a slope in spatially variable soils while considering the known data at particular locations using conditional random fields based on the Kriging method and the Cholesky decomposition technique.

TL;DR: In this paper, a multiphase SPH approach is presented to solve the governing equations, where water is modeled as a weakly compressible fluid, and solid phase is discretized by fixed solid particles carrying information of porosity.

TL;DR: In this paper, the effect of the coarse particle content on the peak shear strength of binary mixtures was investigated for different contact-type friction coefficients, and a detailed analysis on the anisotropic properties of the shear behavior was presented.

TL;DR: In this article, a 3D Voronoi tessellation model based on the distinct element method (DEM) is proposed to model the representative part of the microstructures of granular brittle rocks.

TL;DR: In this article, a numerical approach using bonded-particle model (BPM) was adopted to simulate the loading processes and acoustic emission (AE) events of limestone, which revealed that the AE parameters in the BPM including crack number and AE event were generally comparable with the AE count and AE hit in the experiments.

TL;DR: In this article, a fully coupled hydro-thermal soil model is developed allowing two dimensional analysis of volumetric water content and temperature variations in an embankment constructed at Hericourt in France.

TL;DR: In this article, 3-D discrete element method (DEM) simulations are used to explore the behavior of MICP-cemented sands and the relationship between dilatancy and stress-strain behavior is evaluated.

TL;DR: Empirical expressions relating Δtcrit to m, Kmax, and CN,max are presented; while strictly only valid within the range of simulation scenarios considered here, these can inform DEM analysts selecting appropriate ΔtCrit values.

TL;DR: In this paper, the authors presented a new insight in the application of one of those simplifications known as rolling friction, which avoids excessive rotation when irregular shaped materials are simulated as spheric particles.

TL;DR: A data driven multivariate adaptive regression splines (MARS) based algorithm for system reliability analysis of earth slopes having random soil properties under the framework of limit equilibrium method of slices is considered in this article.

TL;DR: In this article, the authors presented a numerical study on the desiccation cracking process of clayey soil, using finite element code, including the damage-elastic cohesive fracture law to describe the behaviour of cracks.

TL;DR: In this article, the suction is imposed on clayy silt specimens using the pressure plate method and vapor equilibrium technique with saturated salt solutions, and the test results show that the soil-water retention curves (SWRCs) in terms of gravimetric water content versus suction relation over a wide suction range are independent of the initial dry density or void ratio when the SUction is higher than a specific value, which can be determined by results of the mercury intrusion porosimetry test.

TL;DR: In this article, a numerical study of both unreinforced and reinforced tunnel excavation faces by means of 3D FEM analyses is presented, and the results are compared with those of the traditional limit equilibrium method and with an analytical solution based on previous numerical studies.

TL;DR: The difficulties of automatic modelling for both layered construction and material partitioning are eliminated using the octree meshing algorithm and the proposed method can serve as a powerful technique for the rapid design and analysis of geotechnical structures.