Effects of spatial correlation on the compression behavior of a cement-treated column

Tsutomu Namikawa, Junichi Koseki

研究成果: Article

30 引用 (Scopus)

抄録

The strength of soil treated by cement deep mixing varies greatly, even at a single column, because of the variability of in situ soil properties, the variability of mixing effectiveness, and other factors. The variation in strength would affect the entire behavior of the cementtreated column. This paper presents a numerical experiment that investigates the effect of spatial correlation on the unconfined compressive strength of cement-treated columns. Finite element analyses incorporating random-field theory were performed to simulate the unconfined compression behavior of full-scale column samples in which the material properties vary with respect to spatial autocorrelation. The numerical results indicate that spatial autocorrelation affects the compression behavior of full-scale cement-treated columns. The overall strength of the sample in the absence of spatial autocorrelation is slightly lower than that of the uniform sample of mean strength. On the other hand, the overall strength of the sample in the presence of spatial autocorrelation is significantly lower than that of the uniform sample of mean strength. These results suggest that spatial autocorrelation should be considered when evaluating the overall strength of full-scale cement-treated columns within a relevant design procedure.

元の言語English
ページ(範囲)1346-1359
ページ数14
ジャーナルJournal of Geotechnical and Geoenvironmental Engineering
139
発行部数8
DOI
出版物ステータスPublished - 2013

Fingerprint

Autocorrelation
Cements
cement
Compaction
autocorrelation
compression
Soils
Compressive strength
Materials properties
compressive strength
effect
soil property
Experiments
soil
experiment

ASJC Scopus subject areas

  • Environmental Science(all)
  • Geotechnical Engineering and Engineering Geology

これを引用

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abstract = "The strength of soil treated by cement deep mixing varies greatly, even at a single column, because of the variability of in situ soil properties, the variability of mixing effectiveness, and other factors. The variation in strength would affect the entire behavior of the cementtreated column. This paper presents a numerical experiment that investigates the effect of spatial correlation on the unconfined compressive strength of cement-treated columns. Finite element analyses incorporating random-field theory were performed to simulate the unconfined compression behavior of full-scale column samples in which the material properties vary with respect to spatial autocorrelation. The numerical results indicate that spatial autocorrelation affects the compression behavior of full-scale cement-treated columns. The overall strength of the sample in the absence of spatial autocorrelation is slightly lower than that of the uniform sample of mean strength. On the other hand, the overall strength of the sample in the presence of spatial autocorrelation is significantly lower than that of the uniform sample of mean strength. These results suggest that spatial autocorrelation should be considered when evaluating the overall strength of full-scale cement-treated columns within a relevant design procedure.",
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AU - Koseki, Junichi

PY - 2013

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N2 - The strength of soil treated by cement deep mixing varies greatly, even at a single column, because of the variability of in situ soil properties, the variability of mixing effectiveness, and other factors. The variation in strength would affect the entire behavior of the cementtreated column. This paper presents a numerical experiment that investigates the effect of spatial correlation on the unconfined compressive strength of cement-treated columns. Finite element analyses incorporating random-field theory were performed to simulate the unconfined compression behavior of full-scale column samples in which the material properties vary with respect to spatial autocorrelation. The numerical results indicate that spatial autocorrelation affects the compression behavior of full-scale cement-treated columns. The overall strength of the sample in the absence of spatial autocorrelation is slightly lower than that of the uniform sample of mean strength. On the other hand, the overall strength of the sample in the presence of spatial autocorrelation is significantly lower than that of the uniform sample of mean strength. These results suggest that spatial autocorrelation should be considered when evaluating the overall strength of full-scale cement-treated columns within a relevant design procedure.

AB - The strength of soil treated by cement deep mixing varies greatly, even at a single column, because of the variability of in situ soil properties, the variability of mixing effectiveness, and other factors. The variation in strength would affect the entire behavior of the cementtreated column. This paper presents a numerical experiment that investigates the effect of spatial correlation on the unconfined compressive strength of cement-treated columns. Finite element analyses incorporating random-field theory were performed to simulate the unconfined compression behavior of full-scale column samples in which the material properties vary with respect to spatial autocorrelation. The numerical results indicate that spatial autocorrelation affects the compression behavior of full-scale cement-treated columns. The overall strength of the sample in the absence of spatial autocorrelation is slightly lower than that of the uniform sample of mean strength. On the other hand, the overall strength of the sample in the presence of spatial autocorrelation is significantly lower than that of the uniform sample of mean strength. These results suggest that spatial autocorrelation should be considered when evaluating the overall strength of full-scale cement-treated columns within a relevant design procedure.

KW - Cement-treated soils

KW - Compressive strength

KW - Deep mixing method

KW - FEM

KW - Spatial autocorrelation

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