A Transversely Isotropic Damage Model for Boom Clay

Yu, Hongdan; Chen, W. Z.; Li, X. L.; Sillen, X.

doi:10.1007/s00603-012-0346-7

Cited by 14 publications

(4 citation statements)

References 18 publications

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“…Yu et al proposed a constitutive model to fully describe the mechanical behavior of the boom clay by combining the transversely isotropic elastic model and the modified Mohr-Coulomb criterion [13]. Taiebat et al extended the SANICLAY model to include restructuration by conducting two distinct types of restructuration (isotropic and frictional) [14].…”

Section: Introductionmentioning

confidence: 99%

A Case Study on Stratified Settlement and Rebound Characteristics due to Dewatering in Shanghai Subway Station

Wang

Huang

Sui

2013

The Scientific World Journal

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Based on the Yishan Metro Station Project of Shanghai Metro Line number 9, a centrifugal model test was conducted to investigate the behavior of stratified settlement and rebound (SSR) of Shanghai soft clay caused by dewatering in deep subway station pit. The soil model was composed of three layers, and the dewatering process was simulated by self-invention of decompressing devise. The results indicate that SSR occurs when the decompression was carried out, and only negative rebound was found in sandy clay, but both positive and negative rebound occurred in the silty clay, and the absolute value of rebound in sandy clay was larger than in silty clay, and the mechanism of SSR was discussed with mechanical sandwich model, and it was found that the load and cohesive force of different soils was the main source of different responses when decompressed.

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Section: Introductionmentioning

confidence: 99%

A Case Study on Stratified Settlement and Rebound Characteristics due to Dewatering in Shanghai Subway Station

Wang

Huang

Sui

2013

The Scientific World Journal

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“…The accumulation of relative errors of creep strain between numerical calculations and measured results is selected as the objective function minimum. Thus, it can be viewed as an optimisation problem in which the Nelder-Mead direct search method is employed (Yu et al 2014).…”

Section: Determination Of Parameters By Back Analysismentioning

confidence: 99%

Experimental and numerical analysis of the time-dependent behaviour of argillaceous red sandstone under high in situ stress

Tian

Chen

Yang

et al. 2014

Bull Eng Geol Environ

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Understanding the time-dependent behaviour of soft rock under high in situ stress is essential to the evaluation of the long-term stability of the deep-buried tunnels in expressways or coal mines. This paper presents an experimental and numerical study of the time-dependent behaviour of argillaceous red sandstone under high in situ stress. First, several triaxial creep tests for strongly and moderately weathered specimens under the confining pressure of 20-40 MPa were conducted, and the variation of time-dependent damage with time was obtained by investigating the evolution of volumetric strain during the creep process. The test results verify that creep damage has a similar effect on both axial strain and lateral strain of argillaceous red sandstone. Second, a creep damage model that is able to describe nonlinear variation in creep strain and volume expansion for sandstone under high in situ stress was established. Last, the parameters of the proposed model were determined by a back analysis method. The results of back analysis show that the model is able to describe the nonlinear variation in creep strain and volume expansion during the creep process very well.

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“…Dehandschutter et al (2005) observed bedding of Boom Clay by SEM observations. Indeed, given the existence of sub-horizontal bedding planes, Boom Clay can be 5 considered a transversely isotropic geomaterial (Chen et al, 2011;Yu et al, 2014). The anisotropic property of Boom Clay permeability has been investigated by in-situ experiments (Bastiaens et al, 2006).…”

Section: Introductionmentioning

confidence: 99%

Variation of the hydraulic conductivity of Boom Clay under various thermal-hydro-mechanical conditions

Chen

et al. 2016

Engineering Geology

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In this paper, an experimental study is presented that intended to investigate (1) the anisotropy properties of hydraulic conductivity of Boom Clay, (2) the effect of heating-cooling cycle on the hydraulic conductivity and intrinsic permeability of Boom Clay, and (3) the effect of loading-unloading cycle on the hydraulic conductivity and intrinsic permeability of Boom Clay. Constant-head tests were carried out in a temperature-controlled triaxial cell. First, the anisotropic characteristic of hydraulic conductivity of Boom Clay with respect to its bedding was confirmed. The horizontal hydraulic conductivity (parallel to bedding) is larger than the vertical hydraulic conductivity (perpendicular to bedding).Second, there was a positive and reversible relationship between the hydraulic conductivity and temperature and a negative and irreversible relationship between the hydraulic conductivity and hydrostatic pressure.Specifically, for both horizontal and vertical hydraulic conductivity, the value at 80 °C is approximately 2.4 times larger than that at room temperature (23 °C). However, it appears that the hydraulic conductivity is not sensitive to heating rate. Data analysis reveals that under variable temperature conditions, the changes in viscosity and density of water with temperature are the main factors affecting the change in hydraulic conductivity of Boom Clay with temperature, although other factors may have an effect to some extent.3

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A Transversely Isotropic Damage Model for Boom Clay

Cited by 14 publications

References 18 publications

A Case Study on Stratified Settlement and Rebound Characteristics due to Dewatering in Shanghai Subway Station

A Case Study on Stratified Settlement and Rebound Characteristics due to Dewatering in Shanghai Subway Station

Experimental and numerical analysis of the time-dependent behaviour of argillaceous red sandstone under high in situ stress

Variation of the hydraulic conductivity of Boom Clay under various thermal-hydro-mechanical conditions

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