This paper investigates the interaction between layered saturated soft rock–soil mass and pile groups considering free‐standing length and rock‐socketed depth. The modeling of the identical pile is on the basis of one‐dimensional compression bar with a three‐node bar element. The global force balance equation for the pile group is then derived using the finite element method (FEM). Taking the existence

Sand‐rubber mixture (SRM), a composite material made of recycled rubber and sand, is gaining increasing attention in construction engineering due to its lightweight nature, cost‐effectiveness, ease of processing, and other advantages. However, the mechanical behavior of SRM remains a complex issue as the addition of rubber not only increases the types of contacts between grains, but also changes the

Concrete materials consist of multiple phases with distinct mechanical properties, making it essential to accurately identify the mechanical behavior of both constituent phases and their interfaces for effective multiscale modeling. This study estimates the elastic properties of the interfacial transition zone using a machine learning (ML) approach. A dataset is generated from numerical simulations

An optimal design scheme is developed for treating collapsible loess foundation by the super down‐hole dynamic compaction method (SDDC) in terms of the loess foundation treatment project. This method involves the application of high‐energy impacts to the soil to achieve a compacting effect (CE), which is defined as the measurable improvement in soil density and reduction in its collapsibility. The

Owing to their dual role in utilizing geothermal energy and supporting structural loads, energy piles are affected by thermomechanical loads. Moreover, the heating/cooling of energy piles also causes non‐negligible thermal stresses in the soil around the piles. The load transfer method is commonly used to address the thermomechanical response of energy piles. However, this method has problems such

The effective stresses are found to continually increase for undrained cavity expansion in Mohr–Coulomb soils with unlimited dilation. This paper revisits this problem and presents a new solution with further consideration of limited soil dilation. The soil is modelled as a non‐associated Mohr–Coulomb model, and the limited dilation is controlled by the limited plastic volumetric strain, beyond which

This study proposes a three‐dimensional transformed differential quadrature solution for the thermo‐mechanical (TM) and thermo‐hydro‐mechanical (THM) coupling of transversely isotropic soils considering groundwater. Initially, the governing equations for TH coupling above the water table and THM coupling below the water table are introduced. Subsequently, two‐dimensional Fourier integral transform

Coupled nonlinear thermo‐hydro‐mechanical finite element simulations were carried out to investigate the behavior of energy micropiles subjected to thermal loading cycles. Two kinds of problems were analyzed: The case of an isolated micropile, for which comparison with previous research on medium‐size isolated energy pile is provided, and the case of large groups of micropiles, with the aim of investigating

Translatory bumps are becoming a major challenge in the excavation of coal seams. This study presents closed‐form solutions of stress and plastic zone width for translatory coal seam bumps within the framework of the Lippmann theory. The strength of coal seam taken as an elastic−perfectly plastic material and the friction force at the coal−rock interface are evaluated by the generalized effective stress

Geological applications of phase‐field methods for fracture are notably scarce. This work conducts a numerical examination of the applicability of standard phase‐field models in reproducing jointing within sedimentary layers. We explore how the volumetric‐deviatoric split alongside the AT1 and AT2 phase‐field formulations has several advantages in simulating jointing, but also has intrinsic limitations

Over‐break and under‐break excavation is very common in practical tunnel engineering with asymmetrical cavity contour, while existing conformal mapping schemes of complex variable method generally focus on tunnelling with theoretical and symmetrical cavity contour. Besides, the solution strategies of existing conformal mapping schemes for non‐circular tunnel generally apply optimization theory and

Geotextile‐encased stone columns (GESCs) for improving weak foundations commonly experience static and dynamic loads. However, the effectiveness of GESCs in resisting dynamic loading remains a concern. Three‐dimensional numerical models using a continuum‐discrete coupled method are developed to investigate the dynamic response of GESC groups in sand under sinusoidal loading. The models capture the

The effects of surrounding soil degradation on the performance of piles during their operational phase remain inadequately understood within dynamic context. This study presents an energy‐based methodology for estimating the dynamic impedance of a single pile situated in radially weakened soil. To achieve this, the surrounding soil is segmented into discrete annular zones, wherein soil deformation

The present study develops a finite element‐based numerical method for simulation of frictional rotational sliding induced damage and heating effects on rock. The method is applied to the Sievers’ J‐ miniature drill test, which is widely used for estimating the rock drillability and predicting the cutter life. A continuum approach based on a damage‐viscoplastic model for rock failure is adopted. The

The application of stabilizing piles to increase slope stability is a common practice in slope engineering. Most related studies primarily focus on single‐row stabilizing piles; however, for large‐scale slopes, single‐row stabilizing piles may fail to meet the stability requirement, necessitating the use of double‐row or even multiple‐row stabilizing piles. Specifically, for large‐scale earth slopes

This paper investigates the thermo‐mechanical effects of Euler–Bernoulli beams on layered transversely isotropic (TI) saturated subgrade due to moving loads. Firstly, the governing equations for the beam and subgrade are derived using Euler–Bernoulli beam theory, poroelastic mechanics, and thermoelasticity. Then, by adopting the extended precise integration solution for the layered TI saturated subgrade

CO2 injection in the subsurface is considered an option to improve oil and gas production and, more recently, to store CO2. Consequently, there is a need to better understand the interactions between CO2 and rock deposits. Among the primary deposit candidates are carbonate rocks. During CO2 injection in the subsurface, the formation's pore structure and mechanical properties are altered by the interaction

This paper investigates the dynamic response of water‐saturated concrete under high stress levels, with a particular emphasis on the role of pore pressure. An enhanced elastoplastic damage model, incorporating dual plastic mechanisms, is proposed to capture the coupled hydromechanical behavior of concrete under combined high stress and high strain rate loading. Key improvements include the refinement

The hypoplastic theory has gained significant attraction in the geomechanics community for constitutive modeling and numerical simulation. However, the absence of an analytical benchmark for numerical simulations incorporating the hypoplastic model remains a notable gap. This study revisits the basic hypoplastic model for normally consolidated soil, as proposed by Wu et al., by providing explicit formulations

The stability analysis of a saturated soil slope subjected to seepage flow generated by rapid water level drawdown is investigated in this paper by means of the limit analysis kinematic approach. The analysis takes into account the inherent spatial variability of soil strength and permeability properties. Adopting the framework of effective stresses for formulating the strength failure condition of

Most existing passive earth pressure theories are not completely suitable for the calculation of unsaturated backfill in practical engineering, especially for narrow backfill cases. In view of this, this study establishes a modified analytical model for the passive earth pressure of narrow backfill behind a retaining wall under unsaturated steady‐state seepage conditions, based on the log‐spiral failure

During shield tunneling in composite strata, the disc cutter's abnormal damage rate rises sharply under interface impact, due to strata inhomogeneity. This study investigates the dynamic response and the cause of the peak impact force of disc cutters at soft‐hard rock interfaces using the discrete element method. Simulations of linear cutting processes under varying interfacial bonding strengths were

Opening in diaphragm wall is a primary cause of water and sand leakage in excavation, often leading to severe excavation accidents. This process involves complex interactions between fluid flow, granular soil around openings, and continuum materials, yet there is a lack of appropriate calculation methods to address it. This study develops a multiscale, multifield calculation framework integrating the

Granite residual soils exhibit exceptional shear strength despite their water sensitivity. This behavior likely results from cemented aggregates, where free iron oxides act as cementing agents for clay minerals. The limitations of traditional experimental techniques hinder direct verification of the hypothesized microscopic stabilization mechanism, which relies on interfacial bonding between free iron

Real‐time simulation of large‐scale geomechanics problems, such as hydraulic dilation stimulation, is computationally expensive as they must span multiple spatial and temporal length scales, often including nonlinearities and thermo‐hydromechanical processes. This paper introduces a novel local reduced order model (LROM) to enhance computational efficiency for nonlinear and fully‐coupled hydromechanical

We present a constitutive model for the mechanical behavior of granular flow for both solid‐like and fluid‐like regimes. The stress rate tensor is decomposed into rate‐independent and rate‐dependent parts. The hypoplastic model is used for the rate‐independent part, while the ‐type rheological model is employed for the rate‐dependent part. The Stokes number is introduced to capture the influence of

The pot cover effect can increase the moisture content in shallow soil, which reduces subgrade strength and may lead to engineering issues, such as pavement cracks and deformation. Therefore, studying the prevention measures for the subgrade pot cover effect is essential. This paper proposes preventive measures, inspired by capillary barrier layers used in landfills, that involve installing such layers

Energy pile technology is an environmentally sustainable and economically viable solution to achieve building thermal comfort. Energy pipe piles offer advantages over solid piles due to their inner hollow space, allowing for the installation of heat exchange tubes and optimization of backfill materials. Although the activation of an energy pile group can significantly promote the heat exchange performance

The large torque generated by the rotary disk potentially causes the rolling of shield/tunnel boring machine (TBM), especially when it cuts rocks with over‐excavation or hard obstacles in very soft stratum, which further induces the torsion of assembled segments. In addition, the segment torsion may accumulate due to the unidirectional rotary cutting of shield/TBM over long distances. Excessive torsion

Accurate modeling of soil behavior under seismic conditions is critical for understanding and mitigating earthquake‐induced hazards. In this study, the Dyna–Simhypo model, an enhanced hypoplastic framework incorporating the intergranular strain tensor, is integrated with smoothed particle hydrodynamics (SPH) method for the first time to simulate co‐seismic large deformation processes of slopes. The

Investigating wave propagation in transversely isotropic saturated poroelastic material and introducing a family of stretched coordinate transformations to be used for defining a perfectly matched layer (PML) are the main aims of this paper. To this end, the formulation of Biot is adopted as the governing framework of the porous media. The coupled equations of motion and transport equation are uncoupled

The impacts of different types of methane hydrates (e.g., pore‐filling, load‐bearing, grain‐coating, and cementing types) on the mechanical properties of methane hydrate‐bearing sediments (MHBS) exhibit significant variations. However, the quantitative distinctions remain largely unexplored. Following the framework of the classical micromechanics‐based model, a simplified physical model of regularly

Compared with circular shield tunnels, quasi‐rectangular pipe‐jacking tunnels have the advantages of smaller construction disturbances and higher space utilization rates, which are widely applied in urban underground engineering. The carrying‐soil effect is a specific phenomenon during the construction of pipe‐jacking tunnels. To study the influence of carrying‐soil effect on the working face stability

During the construction of box jacking tunnel, stress transfer caused by the soil arching effect is an important factor, affecting the jacking force. This study proposes a jacking force prediction method for box jacking tunnels under the complete and incomplete soil arching effect in sandy soils, which is divided into three soil domains, i.e., an external stable region, an elastic arch, and an internal

In this study, a hybrid black‐ and white‐box machine learning (ML) framework is proposed for matric suction estimation in compacted fine‐grained soils, utilizing ML techniques, namely, particle swarm optimized support vector regression (PSO‐SVR) and multi‐gene genetic programming (MGGP). This objective is achieved through developing a novel ML‐based method for designing requisite soil parameters, including

In‐situ stress condition is an important aspect of buried unpressurized pipelines. Empirical approaches used for preliminary design are usually based on observations, which may be associated with some errors related to the measurement method. The photoelastic approach represents an alternative, nonintrusive measurement technique to model the plane stress‐strain behavior of buried pipes under different

To better understand the strain‐softening effect and its implications for coal construction and extraction, this paper utilizes a numerical simulation method to investigate the deformation stability of gas extraction holes with consideration for strain softening. The study further analyzes the strain‐softening effect on effective stress, gas pressure, and plastic failure mode by comparing models with

In seismic tunnel lining design, most existing studies have focused on circular and box‐type tunnels, while the response of subrectangular tunnel linings under seismic loading, especially in imperfect soil‐lining conditions, remains underexplored. The present paper aims to address this gap by investigating the behavior of subrectangular tunnel lining subjected to seismic loadings in full‐slip condition

Temperature effects become important in a number of geotechnical applications, such as nuclear waste disposal facilities, buried high‐voltage cables, pavement, energy geostructures and geothermal energy. On the other hand, soft soils act time‐ and strain rate dependent. Both temperature and strain rate influence soil behavior, affecting stiffness, strength, and deformation even under constant stress

This paper presents a semi‐analytical method for the stress and displacement of a shallow buried lined tunnel based on the complex variable method under the full‐slip contact condition, that is, along the interface between the surrounding rock/soil mass and lining, the radial stresses and radial displacements are continuous, and the shear stresses are equal to zero. In the presented solution, the interaction

In the construction process of the artificial ground freezing (AGF), the utilization of the temperature field to determine the freezing time is crucial for the safe construction. While the thermal parameter is the core parameter of the temperature field calculation. How to obtain the joint probability distribution of thermal parameters of frozen soil under limited test data is essential to improve

The utilization of cemented tailings backfill (CTB) presents distinct advantages in managing tailings and underground mining voids, occasionally incorporating coarse aggregate. In this study, the particle swarm optimization (PSO) algorithm was employed to optimize the extreme gradient boosting (XGBoost) model for predicting the unconfined compressive strength (UCS) of CTB containing coarse aggregate

Concrete piers located in steep mountainous regions are highly susceptible to damage from debris flows. Existing studies often oversimplify debris flows as particle flows or equivalent fluids, neglecting their multiphase characteristics. In this paper, a three‐dimensional numerical model of debris flow‐bridge piers interaction is established based on the coupled CFD‐DEM approach. The Hertz–Mindlin

Annual precipitation and its intensity have increased worldwide since the start of the 20th century and represent two weather and climate change indicators related to rainfall‐induced landslides. Although these landslides can occur in a very short time, the hydro‐mechanical conditions that precede them can take several hours or days to develop. In this context, understanding the mechanisms of rainfall‐induced

With increasing mining depth, the mining methods for steeply inclined medium‐thick ore bodies have become unsuitable. In this paper, by integrating the roof‐pillar induced caving technology, through technical fusion and reconstruction, a combined mining method of roof‐pillar induced caving and non‐pillar sublevel caving has been formulated. The five core parameters of the combined mining method (the

This paper is concerned with the study of a poroelastic soil layer under impulsive horizontal loading. Building upon Biot's general theory of poroelasticity, a comprehensive set of governing equations addressing three‐dimensional transient wave propagation problem are established. Explicit general solutions for displacements and pore‐pressures are derived by employing a sophisticated mathematical approach

This paper presents an efficient two‐and‐a‐half dimensional (2.5D) numerical approach for analysing the long‐term settlement of a tunnel‐soft soil system under cyclic train loading. Soil deformations from train loads are divided into shear deformation under undrained conditions and volumetric deformation from excess pore water pressure (EPWP) dissipation. A 2.5D numerical model was employed to provide

Further investigation into the progression of soil arching under the impact of noncentered tunnel is warranted. This study addresses this need by examining trapdoor models with varying vertical and horizontal spacings between the tunnel and the trapdoor through the discrete element method. The numerical model underwent calibration utilizing data from previous experiments. The results indicated that

Natural gas hydrates are the preferred alternative to traditional fossil fuels, estimated to store twice as much carbon. The gas hydrate‐bearing sediment (GHBS) is a representative degradable soil. During gas hydrate production, solid mass loss and pore liquid/gas generation occur, including both decomposition and consolidation processes of GHBS. These potentially trigger reservoir collapse, severely

In the field of geomechanics and geotechnical engineering, joint is crucial as a common structure or flaw in rock material. The shear deformation, strength, and failure behavior of rock are significantly influenced by the structural properties of joints, which include arrangement, persistency, dip angle, and length. The shear strength and deformation behavior, as well as the related micro‐cracking

Rigid pile composite foundation (RPCF) has been widely used in Yellow River Alluvial Plain (YRAP) due to remarkable reinforcement and economical effects. However, current design of RPCF in this area are typically based on saturated soil mechanic principles assuming drained condition, despite the fact that the soil is typically in unsaturated condition. Due to long time water scouring, the silt in YRAP

The framework of poromechanics is generalized to simulate the multiscale behavior of porous media subjected to internal loadings stemming from the growth of solid inclusions. This generalization is designed to enable the study of anisotropic internal stress generation from solid growth within the pores, while recovering isotropic fluid‐induced loading as a particular case. For this purpose, a mathematical

Failure criteria are crucial in numerical methods for effectively resolving material failures, especially in geomaterials such as rock and concrete. A wide array of criteria, designed for different rock types and complex stress conditions, has been developed. Although Artificial Neural Network (ANN)‐based failure criteria present a unified solution for incorporating these diverse criteria into numerical

The maintenance effort for a ballast bed is determined by the combination of tamping and stabilizing, which have always been separated in previous researches. In this study, a tamping‐stabilizing‐ballasted track was established, and a dynamic domain was innovatively developed to improve calculation efficiency. This model was verified through a comparison with field test results. Using this model, the