Simulating realistic geological stratigraphy using direction-dependent coupled Markov chain model

Jinhui Li, Yongmin Cai, Xueyou Li, L. Zhang

Research output: Contribution to journalArticle

Abstract

The design of geotechnical structures depends significantly on soil stratigraphy. The determination of geological stratigraphy is generally based on site investigations such as drilling, standard penetration tests and cone penetration tests. When the in-situ tests or boreholes are limited, the characterization of complex strata is difficult. The objective of this study is to develop an improved coupled Markov chain model (CMC) to simulate complex geological stratigraphy based only on limited in-situ data. The traditional CMC model is improved by developing a direction-dependent CMC method to address the strong variation of soil properties among boreholes. The difficulty in simulating different dip directions and prisms in a geological profile is solved by developing proper simulation direction in the modelling. The stratigraphy at a construction site in Hong Kong is characterized using the proposed method. It is found that both upwards and downwards inclined interfaces can be simulated very well. The prisms within a soil layer can be predicted. The accuracy of the method is closely related to the locations of the existing boreholes. The influence distance of a borehole is approximately 14 m.

Original languageEnglish
Article number103147
JournalComputers and Geotechnics
Volume115
DOIs
Publication statusPublished - 1 Nov 2019

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Stratigraphy
Markov chain
Boreholes
Markov processes
stratigraphy
borehole
Prisms
Soils
cone penetration test
penetration test
in situ test
site investigation
Cones
dip
Drilling
soil property
drilling
modeling
simulation
method

Cite this

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abstract = "The design of geotechnical structures depends significantly on soil stratigraphy. The determination of geological stratigraphy is generally based on site investigations such as drilling, standard penetration tests and cone penetration tests. When the in-situ tests or boreholes are limited, the characterization of complex strata is difficult. The objective of this study is to develop an improved coupled Markov chain model (CMC) to simulate complex geological stratigraphy based only on limited in-situ data. The traditional CMC model is improved by developing a direction-dependent CMC method to address the strong variation of soil properties among boreholes. The difficulty in simulating different dip directions and prisms in a geological profile is solved by developing proper simulation direction in the modelling. The stratigraphy at a construction site in Hong Kong is characterized using the proposed method. It is found that both upwards and downwards inclined interfaces can be simulated very well. The prisms within a soil layer can be predicted. The accuracy of the method is closely related to the locations of the existing boreholes. The influence distance of a borehole is approximately 14 m.",
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Simulating realistic geological stratigraphy using direction-dependent coupled Markov chain model. / Li, Jinhui; Cai, Yongmin; Li, Xueyou; Zhang, L.

In: Computers and Geotechnics, Vol. 115, 103147, 01.11.2019.

Research output: Contribution to journalArticle

TY - JOUR

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AU - Li, Jinhui

AU - Cai, Yongmin

AU - Li, Xueyou

AU - Zhang, L.

PY - 2019/11/1

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N2 - The design of geotechnical structures depends significantly on soil stratigraphy. The determination of geological stratigraphy is generally based on site investigations such as drilling, standard penetration tests and cone penetration tests. When the in-situ tests or boreholes are limited, the characterization of complex strata is difficult. The objective of this study is to develop an improved coupled Markov chain model (CMC) to simulate complex geological stratigraphy based only on limited in-situ data. The traditional CMC model is improved by developing a direction-dependent CMC method to address the strong variation of soil properties among boreholes. The difficulty in simulating different dip directions and prisms in a geological profile is solved by developing proper simulation direction in the modelling. The stratigraphy at a construction site in Hong Kong is characterized using the proposed method. It is found that both upwards and downwards inclined interfaces can be simulated very well. The prisms within a soil layer can be predicted. The accuracy of the method is closely related to the locations of the existing boreholes. The influence distance of a borehole is approximately 14 m.

AB - The design of geotechnical structures depends significantly on soil stratigraphy. The determination of geological stratigraphy is generally based on site investigations such as drilling, standard penetration tests and cone penetration tests. When the in-situ tests or boreholes are limited, the characterization of complex strata is difficult. The objective of this study is to develop an improved coupled Markov chain model (CMC) to simulate complex geological stratigraphy based only on limited in-situ data. The traditional CMC model is improved by developing a direction-dependent CMC method to address the strong variation of soil properties among boreholes. The difficulty in simulating different dip directions and prisms in a geological profile is solved by developing proper simulation direction in the modelling. The stratigraphy at a construction site in Hong Kong is characterized using the proposed method. It is found that both upwards and downwards inclined interfaces can be simulated very well. The prisms within a soil layer can be predicted. The accuracy of the method is closely related to the locations of the existing boreholes. The influence distance of a borehole is approximately 14 m.

KW - Geology

KW - Markov chain

KW - Probabilistic

KW - Site investigation

KW - Stratigraphy

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