Showing papers in "Engineering Geology in 2022"

TL;DR: Zhang et al. as discussed by the authors compared the performance of five popular machine learning methods, namely, particle swarm optimization-extreme learning machine (PSO-ELM), PSO-KELM, PSO, SVM and LSTM, in the prediction of reservoir landslide displacement.

TL;DR: In this article , the authors investigated the mechanical properties of hydrate-bearing sediments in the South China Sea from micro-to macro level and showed that the failure strength and stiffness increase with an increasing effective confining pressure, while the failure volumetric strain firstly increases and subsequently decreases with increasing effective pressure.

TL;DR: In this paper , a digital image system was used in triaxial shear tests with failure mode and shear strength discussed, and the apparent feature and microstructure of fiber-reinforced loess were analyzed using the Particles (Pores) and Cracks Analysis System (PCAS) and Scanning Electron Microscope (SEM).

TL;DR: In this paper , the authors performed triaxial compression coupled permeability tests on Chinese impure salt rocks under thermal-hydro-mechanical (THM) coupling condition and found that the peak strength decreased with the decrease of confining pressure and the increase of temperature.

TL;DR: In this paper , the horizontal transition probability matrix (HTPM) is estimated by combining the vertical transition count matrix and intermediate horizontal matrix with Walther's law to simulate complex multi-layer strata based on limited borehole data.

TL;DR: In this article , a 3D equivalent discrete fracture network (DFN) model was proposed and thoroughly validated for fractured rock masses, which can analyze the scale effect and anisotropy of fracture properties effectively.

TL;DR: In this article , an improved Hoek-Brown failure criterion was proposed to estimate the disturbance factor and the GSI of a rock mass. But the method is only applicable to very broken rock masses, i.e. having low Cp values.

TL;DR: In this article , the authors investigated the effects of freeze-thaw cycles on the microstructure characteristics of saline soil with different compaction degrees using mercury intrusion porosimetry (MIP), scanning electron microscopy (SEM), and laser particle size analysis (LPSA).

TL;DR: In this article , the authors investigated the different disaster risks recognized during the various stages of construction of the Sichuan-Tibet Railway project, and summarized the scientific challenges and technical problems faced in relation to disaster risk prevention and control.

TL;DR: In this paper , two typical reservoir landslide of Tangjiao landslide (seepage-driven) and Tanjiahe landslide (buoyancy driven) in the Three Gorges Hydropower Station (TGRA) were taken as study cases.

TL;DR: In this paper , a regression analysis was proposed to estimate the expected released volume as a function of the dam height and stored volume, which can be used for runout analyses and risk assessment of tailings dam failure.

TL;DR: In this article , the suitability of Airborne LiDAR Bathymetry for automatic classification and mapping of seafloor was assessed and nine classes of geomorphological bedforms and three classes of anthropogenic structures were identified.

TL;DR: The results of an analysis concerning a landslide occurred in Calabria (Italy) in 2014 are presented in this paper , where an analytical and simple to use methodology is proposed to reduce the mesh influence on the numerical results.

TL;DR: In this article , the hydraulic conductivity (k) of sandy soil was modeled by employing machine learning (ML) algorithms such as artificial neural network (ANN), multi-expression programming (MEP) and genetic expression programming (GEP) on a large dataset.

TL;DR: Wang et al. as mentioned in this paper used the self-developed seepage device matching with the ring-shear test to study the strength characteristics of slip zone soils under rainfall and reservoir operation.

TL;DR: Wang et al. as discussed by the authors proposed a multi-feature fusion transfer learning (MFTL) method that applies knowledge and skills obtained from the Baijiabao landslide scenario and sufficient monitoring data to improve the prediction capacity for other landslides, such as the Bazimen and Baishuihe landslides.

TL;DR: Wang et al. as mentioned in this paper proposed a new constitutive model to predict the shear deformation behavior of the discontinuity, where intact units and failed units jointly bear the external loads and intact units are gradually transformed into failed units.

TL;DR: In this paper , the effects of compaction state and wetting-drying cycles on desiccation cracking behavior of a clayey soil were investigated, and the results reveal that both compaction water content and dry density play an important role in the development of desICcation cracks.

TL;DR: In this paper , a series of direct tension tests of marble rock under dry, natural and saturated conditions, coupling with the acoustic emission (AE) signals monitoring, were conducted, and some indices, such as AE energy, the ratio of rise time to amplitude (RA) and the average frequency (AF), were unitized to investigate the micro failure process of marble rocks.

TL;DR: In this paper , a triaxial creep test and scanning electron microscopy (SEM) were conducted on intact loess specimens obtained from Heifangtai platform, Gansu, China.

TL;DR: In this paper , the deformation process of both reinforced and unreinforced slopes under rapid drawdown conditions could be divided into four phases: initial, shallow sliding, multisliding and stable phases.

TL;DR: In this article , the authors analyzed the mechanical properties, permeability and energy characteristics of limestone from coal measures strata of TCS tunnel in the context of the Taoziya tunnel as the engineering background.

TL;DR: In this article , the authors investigate the count and energy characteristics of acoustic emission (AE) and 15 numerical models are carried out with PFC to analyze the distributional characteristics of the stress, displacement, fracture and force chain fields.

TL;DR: In this paper , a coupled Eulerian-finite-discrete element method (CEFDEM) is proposed to better understand the dynamic process of rock avalanches blocking rivers.

TL;DR: In this article , Zhang et al. performed 3D and forward numerical analyses based on generalized Zhang-Zhu (GZZ) strength criterion to investigate the principal stress rotation behavior and active control mechanism during deep tunneling.

TL;DR: In this article , the authors investigated the temporal and spatial distribution of settlement in Yan'an New District (YND) and the key influencing factors, such as filling, construction, and precipitation, were analyzed.

TL;DR: In this paper , a three-stage method was proposed to predict the collapse area in a real-time manner by combining the TBM-generated data with a deep learning algorithm, which is further examined using the big data from Yin-song tunneling Project in China.

TL;DR: In this paper , the authors conducted a series of three-dimensional random finite element analyses on the uplift bearing capacity and failure mechanisms of square plate anchors considering the combined effects of anchor buried depth and soil spatial variability.

TL;DR: In this paper , a post-processing methodology was developed to quantify the 2D and 3D features of soil cracking, including surface crack ratio, total volume, surface area, and fractal dimension.

TL;DR: In this paper , a series of triaxial compression experiments with real-time computerized tomography (CT) scanning revealed the evolution of fracture damage in coral reef limestone (CRL) and a calculation method for Poisson's ratio was derived using the CT value.