Acta Geotechnica

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Framework for incorporating multi-level morphology of particles in DEM simulations: independent control of polydisperse distributions of roundness and roughness while preserving form distributions in granular materials
Acta Geotechnica - - Trang 1-24 - 2024
Meng Fan, Dong Su, Xiangsheng Chen
Particle shape in granular materials exhibits both polydisperse and multi-level characteristics, which are intrinsically linked to the mechanical behaviours of granular materials. This study develops a particle generation framework to achieve independent control of polydisperse distributions of roundness (second level of particle shape) and roughness (third level) while preserving form (first leve...... hiện toàn bộ
Modeling and monitoring in a soft argillaceous shale tunnel
Acta Geotechnica - Tập 4 - Trang 273-282 - 2009
Lin-chong Huang, Zhi-sheng Xu, Cui-ying Zhou
Taking advantage of measurements from an in situ monitoring program and an elastoplastic model using the finite-difference method, this paper simulates and evaluates the deformation and stability of a tunnel in soft argillaceous shale. The elastoplastic model is implemented in FLAC3D program to simulate the deformation and the stress of the soft argillaceous shale during construction. In situ test...... hiện toàn bộ
Resilient and permanent deformation of unsaturated unbound granular materials under cyclic loading by the large-scale triaxial tests
Acta Geotechnica - Tập 15 Số 12 - Trang 3343-3356 - 2020
Chunxing Gu, Yulin Zhan, Jun Wang, Yuanqiang Cai, Zhigang Cao, Qi Zhang
Field tests on bearing characteristics of DPC pipe piles including effects of end sealing and side grouting
Acta Geotechnica -
Mengxiong Tang, Bo Li, Chunlin Li, Zao Ling, Dingli Su, Zhenkun Hou
Experimental investigation of the strain rate effect on crack initiation and crack damage thresholds of hard rock under quasi-static compression
Acta Geotechnica - Tập 18 - Trang 903-920 - 2022
Rongchao Xu, Shengzhe Zhang, Zhen Li, Xinming Yan
The crack closure stress σcc, crack initiation stress σci and crack damage stress σcd are important mechanical parameters to describe the brittle failure mechanism of hard rock. To investigate the strain rate effect on the crack stress threshold and to reveal the mechanical mechanism of hard rock showing different strength and deformation characteristics at various strain rates, uniaxial compressi...... hiện toàn bộ
Rate-dependent behaviour of a saturated clay under different stress histories and k0 conditions
Acta Geotechnica - Tập 15 - Trang 1501-1512 - 2019
Shengshen Wu, Thomas Lok, Youwei Xu, Dong Wang
This paper investigates the results obtained from a series of K0-consolidated undrained triaxial tests, which were carried out on marine clay specimens under different stress histories and strain rates. All marine clay specimens were prepared from a slurry state and pre-consolidated in a consolidometer under a vertical pressure of 100 kPa. The specimens were then compressed to the same initial eff...... hiện toàn bộ
Geodynamic modeling
Acta Geotechnica - Tập 4 - Trang 149-149 - 2009
Huilin Xing, Jianhua Wang
A particle-scale study of the triaxial compression behavior of methane hydrate-bearing sands
Acta Geotechnica - - Trang 1-23 - 2023
Zeshao You, Yanghui Li, Haijun Wang, Xiang Sun, Shi Shen, Peng Wu, Yongchen Song
Macroscopic geomechanical properties of methane hydrate-bearing sands (MHBSs) have attracted much scholarly attention. But the associated particle-level mechanisms often rely on assumptions. In this paper, triaxial compression tests and numerical simulations using discrete element method (DEM) are combined to study the unique mechanical properties of MHBS at the particle scale. The triaxial compre...... hiện toàn bộ
Role of superabsorbent polymer in compression behavior of high water content slurries
Acta Geotechnica - - 2024
Xia Bian, Feiyang Zhao, Lingling Zeng, Zhilin Ren, Xiaozhao Li
Efficient dewatering plays a crucial role in land reclamation projects involving dredged slurry with high water content. Superabsorbent polymers (SAP), renowned for their exceptional water absorption capacity, have emerged as potential environmentally friendly and highly efficient dewatering agents for large-scale slurry dewatering. This study aims to investigate the compressive behavior of SAP-tr...... hiện toàn bộ
On the weak turbulent motions of an isothermal dry granular dense flow with incompressible grains: part I. Equilibrium turbulent closure models
Acta Geotechnica - Tập 9 - Trang 725-737 - 2014
Chung Fang, Wei Wu
The weak turbulent motions of a dry granular dense flow and the influence of the turbulent fluctuations caused by the minor short-term elastic/inelastic instantaneous collisions and the major long-term enduring frictional contacts among the grains on the mean flow characteristics are investigated. To this end, the conventional Reynolds-averaging process is applied to obtain the balance equations f...... hiện toàn bộ
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