Constitutive model for monotonic and cyclic responses of loosely cemented sand formations

Rahimi, Mojtaba; Chan, Dave; Nouri, Alireza

doi:10.1016/j.jrmge.2018.01.010

Cited by 10 publications

(3 citation statements)

References 40 publications

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“…Despite numerous studies conducted, limited attention has been paid to the constitutive behaviour of MICP-treated soils. Several constitutive models can be found in the literature that have been developed for cemented soils [46,[125][126][127][128][129][130][131][132][133][134]. However, only in a very limited number of cases have the models been either developed or validated specifically for MICP-treated soils.…”

Section: Constitutive Modellingmentioning

confidence: 99%

State-of-the-Art Review of Microbial-Induced Calcite Precipitation and Its Sustainability in Engineering Applications

et al. 2020

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Microbial-induced calcite precipitation (MICP) is a promising new technology in the area of Civil Engineering with potential to become a cost-effective, environmentally friendly and sustainable solution to many problems such as ground improvement, liquefaction remediation, enhancing properties of concrete and so forth. This paper reviews the research and developments over the past 25 years since the first reported application of MICP in 1995. Historical developments in the area, the biological processes involved, the behaviour of improved soils, developments in modelling the behaviour of treated soil and the challenges associated are discussed with a focus on the geotechnical aspects of the problem. The paper also presents an assessment of cost and environmental benefits tied with three application scenarios in pavement construction. It is understood for some applications that at this stage, MICP may not be a cost-effective or even environmentally friendly solution; however, following the latest developments, MICP has the potential to become one.

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Section: Constitutive Modellingmentioning

confidence: 99%

State-of-the-Art Review of Microbial-Induced Calcite Precipitation and Its Sustainability in Engineering Applications

et al. 2020

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“…Mining activities in these formations expose tunnels to stress-induced challenges, such as roof and floor deformation, instability of the rock mass, and damage to the tunnel's immediate surroundings, which significantly impact mine safety. Therefore, a comprehensive study of the mechanical properties of weakly cemented sandstone and the development of a pertinent material relationship is crucial for understanding the stability evolution patterns of the tunnel's surrounding rock, ceiling, and floor [3][4][5].…”

Section: Introductionmentioning

confidence: 99%

Segmented constitutive relationship of weakly cemented sandstone and numerical implementation based on homogeneity

WANG,

Zuo,

Zhang

2024

Preprint

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In this study, we employed triaxial compression tests on weakly cemented sand specimens under varying confining pressures (ranging from 3.5 to 19.5 MPa) to investigate their mechanical properties and deformation characteristics. Utilizing the Two-Parts Hook's Model (TPHM) and statistical damage theory, we constructed a comprehensive model, which was subsequently integrated into the FLAC3D numerical platform. The findings revealed a decrease in the compaction stage as confinement pressure increased, with strains of 0.005 at 3.5 MPa and 0.002 at 19.5 MPa. The TPHM effectively captured the non-linear elastic and elastic deformation before damage onset, while the statistical damage model aptly described post-damage deformation. Incorporating the rock's homogeneity parameter (m) in the model implementation, the simulation results closely matched experimental data, providing a more accurate representation of stress field migration and damage zone evolution during the failure process of weakly cemented sandstone. These findings contribute valuable insights to understanding stability changes in tunnel surroundings, roofs, and floors during coal mining operations in areas with weakly cemented sandstone, thereby offering a reference for practical applications.

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“…The constitutive model of soil is an important research topic in theoretical soil mechanics. In the past few decades, numerous proposals have been made to describe the stress-strain relationship of soil in triaxial tests (i.e., the consolidated undrained (CU) test and the consolidated drained (CD) test) based on elastic-plastic theory or damage theory and influencing factors [4][5][6][7].…”

Section: Introductionmentioning

confidence: 99%

Stress-Strain Relationship of Clay in Dongting Lake Area Based on Three Damage Factors

Chen

Yang

et al. 2023

Geofluids

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CU test and CD test were performed to capture the stress-strain characteristics of the clay in Dongting Lake area, China. Since the classical constitutive model cannot ideally describe the strain hardening behavior of the clay, an improved constitutive model that involved three damage factors was proposed. The damage first factor D 1 , which represents elemental volume strength F , was fitted by the Weibull function. The second and third damage factors D 2 and D 3 , which represent the porosity ratio e and the drainage rate P ε respectively, were fitted by Harris function. The CD test damage model is constructed by D 1 , D 2 , and D 3 . In the CU test, the porosity ratio e is a constant value, and the drainage volume is 0, so that D 2 is constant value and D 3 is 0. Therefore, the CU test damage model of the clay was constructed using the damage first factor D 1 . In the end, the accuracy of the proposed CU/CD damage constitutive models of the clay was validated with the experimental results. It is found that the results fitted by the proposed methodology are in good agreement with the experimental results.

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Constitutive model for monotonic and cyclic responses of loosely cemented sand formations

Cited by 10 publications

References 40 publications

State-of-the-Art Review of Microbial-Induced Calcite Precipitation and Its Sustainability in Engineering Applications

State-of-the-Art Review of Microbial-Induced Calcite Precipitation and Its Sustainability in Engineering Applications

Segmented constitutive relationship of weakly cemented sandstone and numerical implementation based on homogeneity

Stress-Strain Relationship of Clay in Dongting Lake Area Based on Three Damage Factors

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