Sequential back analysis of spatial distribution of geomechanical properties around an unlined rock cavern

Xu Gao; E. Chuan Yan; Tian Chyi Jim Yeh; Yu Li Wang; Jing Sen Cai; Yong Hong Hao

doi:10.1016/j.compgeo.2018.03.007

Sequential back analysis of spatial distribution of geomechanical properties around an unlined rock cavern

Xu Gao, E. Chuan Yan, Tian Chyi Jim Yeh, Yu Li Wang, Jing Sen Cai, Yong Hong Hao

Hydrology and Atmospheric Science

Research output: Contribution to journal › Article › peer-review

15 Scopus citations

Abstract

This paper develops a sequential displacement data collection and back analysis approach for mapping spatially distributed Young's modulus (E) in a rock mass during the excavation of an unlined rock cavern (URC). Results show that this approach provides an unbiased estimate of the E field and its uncertainty. It also reveals a more detailed E distribution than kriging approach, which is based on samples of E values from boreholes before excavations. Further, predicted shear strain distribution and displacement of cavern periphery based on the estimates from this approach are more accurate than those based on the kriging estimate.

Original language	English (US)
Pages (from-to)	177-190
Number of pages	14
Journal	Computers and Geotechnics
Volume	99
DOIs	https://doi.org/10.1016/j.compgeo.2018.03.007
State	Published - Jul 2018

Keywords

Displacement back analysis
Heterogeneity
Successive linear estimator
Unlined rock cavern
Young's modulus

ASJC Scopus subject areas

Geotechnical Engineering and Engineering Geology
Computer Science Applications

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10.1016/j.compgeo.2018.03.007

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title = "Sequential back analysis of spatial distribution of geomechanical properties around an unlined rock cavern",

abstract = "This paper develops a sequential displacement data collection and back analysis approach for mapping spatially distributed Young's modulus (E) in a rock mass during the excavation of an unlined rock cavern (URC). Results show that this approach provides an unbiased estimate of the E field and its uncertainty. It also reveals a more detailed E distribution than kriging approach, which is based on samples of E values from boreholes before excavations. Further, predicted shear strain distribution and displacement of cavern periphery based on the estimates from this approach are more accurate than those based on the kriging estimate.",

keywords = "Displacement back analysis, Heterogeneity, Successive linear estimator, Unlined rock cavern, Young's modulus",

author = "Xu Gao and Yan, {E. Chuan} and Yeh, {Tian Chyi Jim} and Wang, {Yu Li} and Cai, {Jing Sen} and Hao, {Yong Hong}",

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T1 - Sequential back analysis of spatial distribution of geomechanical properties around an unlined rock cavern

AU - Gao, Xu

AU - Yan, E. Chuan

AU - Yeh, Tian Chyi Jim

AU - Wang, Yu Li

AU - Cai, Jing Sen

AU - Hao, Yong Hong

PY - 2018/7

Y1 - 2018/7

N2 - This paper develops a sequential displacement data collection and back analysis approach for mapping spatially distributed Young's modulus (E) in a rock mass during the excavation of an unlined rock cavern (URC). Results show that this approach provides an unbiased estimate of the E field and its uncertainty. It also reveals a more detailed E distribution than kriging approach, which is based on samples of E values from boreholes before excavations. Further, predicted shear strain distribution and displacement of cavern periphery based on the estimates from this approach are more accurate than those based on the kriging estimate.

AB - This paper develops a sequential displacement data collection and back analysis approach for mapping spatially distributed Young's modulus (E) in a rock mass during the excavation of an unlined rock cavern (URC). Results show that this approach provides an unbiased estimate of the E field and its uncertainty. It also reveals a more detailed E distribution than kriging approach, which is based on samples of E values from boreholes before excavations. Further, predicted shear strain distribution and displacement of cavern periphery based on the estimates from this approach are more accurate than those based on the kriging estimate.

KW - Displacement back analysis

KW - Heterogeneity

KW - Successive linear estimator

KW - Unlined rock cavern

KW - Young's modulus

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JO - Computers and Geotechnics

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Sequential back analysis of spatial distribution of geomechanical properties around an unlined rock cavern

Abstract

Keywords

ASJC Scopus subject areas

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