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

Research output: Contribution to journalArticlepeer-review

7 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 languageEnglish (US)
Pages (from-to)177-190
Number of pages14
JournalComputers and Geotechnics
Volume99
DOIs
StatePublished - 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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