Acta Geotechnica

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Ground displacements and stresses around a non-uniformly deforming circular tunnel in elastic media using complex variable method
Acta Geotechnica - Tập 18 - Trang 2169-2193 - 2022
Hemant Jain, Jyant Kumar
A closed-form analytical solution using complex variables has been determined to predict ground displacements and stresses around a non-uniformly deforming single circular tunnel in a linearly elastic weightless and ponderable (weighty) medium. For the weightless medium, the solution has been derived with the satisfaction of (1) stress-free conditions on the boundary of the elastic half-space and ...... hiện toàn bộ
“Soil arching” for piled embankments: insights from stress redistribution behaviour of DEM modelling
Acta Geotechnica - Tập 15 - Trang 2117-2136 - 2020
Han-Jiang Lai, Jun-Jie Zheng, Ming-Juan Cui, Jian Chu
For piled embankments, it is widely recognised that the majority of embankment load can be transferred to the piles through the “soil arching” mobilised in the embankment. To date, no consensus has been reached on the shape and composition of the “soil arching”. In light of this, a total of 131 2D trapdoor-like discrete element method models were conducted in this study to present the soil arching...... hiện toàn bộ
Modelling of soil–water characteristic curve for diverse soils using soil suction parameters
Acta Geotechnica - Tập 18 - Trang 4233-4244 - 2023
Bashar Alibrahim, Eris Uygar
The application of unsaturated soil mechanics in geotechnical engineering problems relies on the construction of the soil–water characteristic curve (SWCC). The existing relationships for SWCC are presented in the form of fitting equations, which contain fitting coefficients rather than physically well-defined soil parameters linked to test data. Hence, two new formulations are developed to repres...... hiện toàn bộ
A fabric-based sand plasticity model with reversal surfaces within anisotropic critical state theory
Acta Geotechnica - Tập 14 - Trang 253-277 - 2018
Achilleas G. Papadimitriou, Yannis K. Chaloulos, Yannis F. Dafalias
The paper describes the formulation and capabilities of a new constitutive model that accounts for the effects of fabric anisotropy on the response of granular materials under monotonic loading. It is developed within the framework of bounding surface plasticity in conjunction with the concept of (stress) reversal surfaces, i.e., the use of the last stress reversal point as projection center for d...... hiện toàn bộ
A binary packing material-based method for estimating small-strain shear modulus of sandy soils
Acta Geotechnica -
Qi Wu, Tianzhu Hang, Jiawei Jiang, Chengshun Xu, Guoxing Chen
Coupled deformation–seepage analysis of dynamic capacity tests on open-ended piles in saturated sand
Acta Geotechnica - Tập 12 - Trang 211-223 - 2016
J. Grabe, E. Heins
Open-ended piles such as tubular piles or I-beams are used as foundations for offshore and nearshore construction. After the pile installation a load test to estimate the bearing capacity of these open-ended piles is necessary. Due to the offshore conditions and the high bearing capacity of the installed piles a static load test is not normally feasible. Therefore, dynamic load tests are carried o...... hiện toàn bộ
Temporal evolution of backward erosion piping in small-scale experiments
Acta Geotechnica - Tập 17 - Trang 4555-4576 - 2022
Johannes C. Pol, Willem Kanning, Vera M. van Beek, Bryant A. Robbins, Sebastiaan N. Jonkman
Backward erosion piping (BEP) is a form of internal erosion which can lead to failure of levees and dams. Most research focused on the critical head difference at which piping failure occurs. Two aspects have received less attention, namely (1) the temporal evolution of piping and (2) the local hydraulic conditions in the pipe and at the pipe tip. We present small-scale experiments with local pres...... hiện toàn bộ
Improvement in silty sand with enzyme-induced carbonate precipitation: laboratory model experiment
Acta Geotechnica - Tập 17 - Trang 2895-2905 - 2021
Jia He, Feng Yang, Yong-Shuai Qi, Chang-Hang Fang, Bo-Yang Yan, Yi Zhang, Lei Hang, Yu-Feng Gao
Enzyme-induced carbonate precipitation (EICP) is a promising method for the improvement in soil properties. In this study, a model test using a meter-scale soil model was carried out to investigate the feasibility and performance of using the EICP method for the improvement in silty sand. Crude urease derived from soybeans was used for the catalyzation of urea decomposition in the EICP process. In...... hiện toàn bộ
Numerical investigation of debris flow–structure interactions in the Yarlung Zangbo River valley, north Himalaya, with a novel integrated approach considering structural damage
Acta Geotechnica - Tập 18 - Trang 5859-5881 - 2023
Yiding Bao, Lijun Su, Jianping Chen, Chonglei Zhang, Bo Zhao, Weifeng Zhang, Jianqiang Zhang, Bingli Hu, Xudong Zhang
In the Yarlung Zangbo River valley in north Himalaya, many high-frequency debris flows develop, with large amounts of run-out debris materials. To reduce the hazard scale of the debris flow, check dams are frequently used to mitigate and prevent debris flow movement, and many check dams are damaged under the impact of debris flows. This paper proposed a novel integrated three-dimensional numerical...... hiện toàn bộ
Extended paraelasticity and its application to a boundary value problem
Acta Geotechnica - Tập 6 - Trang 81-92 - 2011
A. Niemunis, L. F. Prada-Sarmiento, C. E. Grandas-Tavera
Paraelasticity (PE) is a hysteretic, fully reversible model with rate-independent damping and with variable secant stiffness. PE has been proposed in the companion paper (Niemunis et al. in Acta Geotech, 2011) for the 3D case. Here, paraelasticity is extended for demanding application in geomechanics by implementation of a reversible dilatancy–contractancy. Moreover, an implicit FE implementation ...... hiện toàn bộ
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