Study on creep mechanism of coral sand based on particle breakage evolution law
The time-dependent deformation property of backfill coral sand is of great important to the long-term stability of engineer facilities bulit on reefs and reclaimed land. In order to investigate the long-term deformation behavior, one-dimensional compression creep tests under different constant stres...
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doaj-0df124103d7f497baed470f754bfdc682020-11-25T01:48:29ZengJVE InternationalJournal of Vibroengineering1392-87162538-84602019-06-012141201121410.21595/jve.2019.2062520625Study on creep mechanism of coral sand based on particle breakage evolution lawBin Chen0Daijie Chao1Wenjuan Wu2Jieming Hu3Hunan Provincial Key Laboratory of Geomechanics and Engineering Safety, Xiangtan University, Xiangtan, Hunan, 411105, ChinaHunan Provincial Key Laboratory of Geomechanics and Engineering Safety, Xiangtan University, Xiangtan, Hunan, 411105, ChinaInstitute of Rock and Soil Mechanic, Chinese Academy of Sciences, Wuhan, 430071, ChinaHunan Provincial Key Laboratory of Geomechanics and Engineering Safety, Xiangtan University, Xiangtan, Hunan, 411105, ChinaThe time-dependent deformation property of backfill coral sand is of great important to the long-term stability of engineer facilities bulit on reefs and reclaimed land. In order to investigate the long-term deformation behavior, one-dimensional compression creep tests under different constant stresses were carried out for coral sand taken from a reef in the South China Sea by WG type high-pressure consolidation instrument. The test results show that under the action of constant stress, coral sand has a strong deformation timeliness and shows remarkable nonlinear attenuation creep characteristics. The creep of coral sand has obvious stages and has gone through three stages of instantaneous deformation, accelerated deformation and slow deformation phase tending to stability. The relationship of strain-time can be fitted with power function in mathematic. The particle breakage state of any single particle size group of coral sand after creep can be well described by using the two-parameter Weibull distribution function, Weibull parameters a and b have a good exponential relationship with stress, and have a negative linear relation with quantitative index Br of particle breakage, and have a negatively correlated with final total strain. Under the action of low stress level, the main cause of creep deformation is the movement and recombination of particles. At low stress level, the movement and recombination of particles are the main reason of creep deformation, while at high stress level, the slippage and filling pores of broken coral sand particles are the main reason of creep deformation.https://www.jvejournals.com/article/20625coral sandparticle breakageWeibull distributionevolutioncreep |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Bin Chen Daijie Chao Wenjuan Wu Jieming Hu |
spellingShingle |
Bin Chen Daijie Chao Wenjuan Wu Jieming Hu Study on creep mechanism of coral sand based on particle breakage evolution law Journal of Vibroengineering coral sand particle breakage Weibull distribution evolution creep |
author_facet |
Bin Chen Daijie Chao Wenjuan Wu Jieming Hu |
author_sort |
Bin Chen |
title |
Study on creep mechanism of coral sand based on particle breakage evolution law |
title_short |
Study on creep mechanism of coral sand based on particle breakage evolution law |
title_full |
Study on creep mechanism of coral sand based on particle breakage evolution law |
title_fullStr |
Study on creep mechanism of coral sand based on particle breakage evolution law |
title_full_unstemmed |
Study on creep mechanism of coral sand based on particle breakage evolution law |
title_sort |
study on creep mechanism of coral sand based on particle breakage evolution law |
publisher |
JVE International |
series |
Journal of Vibroengineering |
issn |
1392-8716 2538-8460 |
publishDate |
2019-06-01 |
description |
The time-dependent deformation property of backfill coral sand is of great important to the long-term stability of engineer facilities bulit on reefs and reclaimed land. In order to investigate the long-term deformation behavior, one-dimensional compression creep tests under different constant stresses were carried out for coral sand taken from a reef in the South China Sea by WG type high-pressure consolidation instrument. The test results show that under the action of constant stress, coral sand has a strong deformation timeliness and shows remarkable nonlinear attenuation creep characteristics. The creep of coral sand has obvious stages and has gone through three stages of instantaneous deformation, accelerated deformation and slow deformation phase tending to stability. The relationship of strain-time can be fitted with power function in mathematic. The particle breakage state of any single particle size group of coral sand after creep can be well described by using the two-parameter Weibull distribution function, Weibull parameters a and b have a good exponential relationship with stress, and have a negative linear relation with quantitative index Br of particle breakage, and have a negatively correlated with final total strain. Under the action of low stress level, the main cause of creep deformation is the movement and recombination of particles. At low stress level, the movement and recombination of particles are the main reason of creep deformation, while at high stress level, the slippage and filling pores of broken coral sand particles are the main reason of creep deformation. |
topic |
coral sand particle breakage Weibull distribution evolution creep |
url |
https://www.jvejournals.com/article/20625 |
work_keys_str_mv |
AT binchen studyoncreepmechanismofcoralsandbasedonparticlebreakageevolutionlaw AT daijiechao studyoncreepmechanismofcoralsandbasedonparticlebreakageevolutionlaw AT wenjuanwu studyoncreepmechanismofcoralsandbasedonparticlebreakageevolutionlaw AT jieminghu studyoncreepmechanismofcoralsandbasedonparticlebreakageevolutionlaw |
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