Effects of short-term mechanical loads on the cracking of glass tubes in a 500-m-deep rock formation

Nicolas Barth, Yves Rémond, Frédéric Bumbieler, François Buscail, Aurélien Schwartz, Said Ahzi, Daniel George

Research output: Contribution to journalArticle

Abstract

To determine the reliability of deep geological repositories for radioactive waste, understanding the mechanical interactions between the host rock and structures is of great importance. Among repository concepts, high-level activity waste disposal cells consist of drilled underground horizontal microtunnels with a steel casing (0.9 m diameter). The French Andra's Underground Research Laboratory conducts ongoing research activities to characterize the casing reliability over an initial period of at least 100 years, for reversibility purposes. Several experiments are dedicated to short-term mechanical analyses of the 500-m-deep host rock formation. Due to the complex hydromechanical response of the rock to drilling, unintuitive mechanical loadings are observed in comparison with the surrounding lithostatic equilibrium stress state. In this work, these short-term mechanical loads applied on glass tubes inside a borehole are investigated. A finiteelement model is developed to predict adequate load scenarios, source of the anisotropic continuum damage.

Original languageEnglish
Article number04018002
JournalJournal of Geotechnical and Geoenvironmental Engineering
Volume144
Issue number3
DOIs
Publication statusPublished - 1 Mar 2018

Fingerprint

repository
host rock
glass
Rocks
Glass
Geological repositories
waste disposal
rock
radioactive waste
borehole
steel
drilling
Research laboratories
Radioactive wastes
Boreholes
Waste disposal
damage
Drilling
Steel
experiment

Keywords

  • Continuum damage mechanics (CDM)
  • Damage propagation characterization
  • Lithostatic stress
  • Nuclear waste repository
  • Underground research laboratory

ASJC Scopus subject areas

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

Cite this

Effects of short-term mechanical loads on the cracking of glass tubes in a 500-m-deep rock formation. / Barth, Nicolas; Rémond, Yves; Bumbieler, Frédéric; Buscail, François; Schwartz, Aurélien; Ahzi, Said; George, Daniel.

In: Journal of Geotechnical and Geoenvironmental Engineering, Vol. 144, No. 3, 04018002, 01.03.2018.

Research output: Contribution to journalArticle

Barth, Nicolas ; Rémond, Yves ; Bumbieler, Frédéric ; Buscail, François ; Schwartz, Aurélien ; Ahzi, Said ; George, Daniel. / Effects of short-term mechanical loads on the cracking of glass tubes in a 500-m-deep rock formation. In: Journal of Geotechnical and Geoenvironmental Engineering. 2018 ; Vol. 144, No. 3.
@article{2d6ea6d7695b4f2589618b5b7834d48b,
title = "Effects of short-term mechanical loads on the cracking of glass tubes in a 500-m-deep rock formation",
abstract = "To determine the reliability of deep geological repositories for radioactive waste, understanding the mechanical interactions between the host rock and structures is of great importance. Among repository concepts, high-level activity waste disposal cells consist of drilled underground horizontal microtunnels with a steel casing (0.9 m diameter). The French Andra's Underground Research Laboratory conducts ongoing research activities to characterize the casing reliability over an initial period of at least 100 years, for reversibility purposes. Several experiments are dedicated to short-term mechanical analyses of the 500-m-deep host rock formation. Due to the complex hydromechanical response of the rock to drilling, unintuitive mechanical loadings are observed in comparison with the surrounding lithostatic equilibrium stress state. In this work, these short-term mechanical loads applied on glass tubes inside a borehole are investigated. A finiteelement model is developed to predict adequate load scenarios, source of the anisotropic continuum damage.",
keywords = "Continuum damage mechanics (CDM), Damage propagation characterization, Lithostatic stress, Nuclear waste repository, Underground research laboratory",
author = "Nicolas Barth and Yves R{\'e}mond and Fr{\'e}d{\'e}ric Bumbieler and Fran{\cc}ois Buscail and Aur{\'e}lien Schwartz and Said Ahzi and Daniel George",
year = "2018",
month = "3",
day = "1",
doi = "10.1061/(ASCE)GT.1943-5606.0001834",
language = "English",
volume = "144",
journal = "Journal of Geotechnical and Geoenvironmental Engineering - ASCE",
issn = "1090-0241",
publisher = "American Society of Civil Engineers (ASCE)",
number = "3",

}

TY - JOUR

T1 - Effects of short-term mechanical loads on the cracking of glass tubes in a 500-m-deep rock formation

AU - Barth, Nicolas

AU - Rémond, Yves

AU - Bumbieler, Frédéric

AU - Buscail, François

AU - Schwartz, Aurélien

AU - Ahzi, Said

AU - George, Daniel

PY - 2018/3/1

Y1 - 2018/3/1

N2 - To determine the reliability of deep geological repositories for radioactive waste, understanding the mechanical interactions between the host rock and structures is of great importance. Among repository concepts, high-level activity waste disposal cells consist of drilled underground horizontal microtunnels with a steel casing (0.9 m diameter). The French Andra's Underground Research Laboratory conducts ongoing research activities to characterize the casing reliability over an initial period of at least 100 years, for reversibility purposes. Several experiments are dedicated to short-term mechanical analyses of the 500-m-deep host rock formation. Due to the complex hydromechanical response of the rock to drilling, unintuitive mechanical loadings are observed in comparison with the surrounding lithostatic equilibrium stress state. In this work, these short-term mechanical loads applied on glass tubes inside a borehole are investigated. A finiteelement model is developed to predict adequate load scenarios, source of the anisotropic continuum damage.

AB - To determine the reliability of deep geological repositories for radioactive waste, understanding the mechanical interactions between the host rock and structures is of great importance. Among repository concepts, high-level activity waste disposal cells consist of drilled underground horizontal microtunnels with a steel casing (0.9 m diameter). The French Andra's Underground Research Laboratory conducts ongoing research activities to characterize the casing reliability over an initial period of at least 100 years, for reversibility purposes. Several experiments are dedicated to short-term mechanical analyses of the 500-m-deep host rock formation. Due to the complex hydromechanical response of the rock to drilling, unintuitive mechanical loadings are observed in comparison with the surrounding lithostatic equilibrium stress state. In this work, these short-term mechanical loads applied on glass tubes inside a borehole are investigated. A finiteelement model is developed to predict adequate load scenarios, source of the anisotropic continuum damage.

KW - Continuum damage mechanics (CDM)

KW - Damage propagation characterization

KW - Lithostatic stress

KW - Nuclear waste repository

KW - Underground research laboratory

UR - http://www.scopus.com/inward/record.url?scp=85040241432&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85040241432&partnerID=8YFLogxK

U2 - 10.1061/(ASCE)GT.1943-5606.0001834

DO - 10.1061/(ASCE)GT.1943-5606.0001834

M3 - Article

VL - 144

JO - Journal of Geotechnical and Geoenvironmental Engineering - ASCE

JF - Journal of Geotechnical and Geoenvironmental Engineering - ASCE

SN - 1090-0241

IS - 3

M1 - 04018002

ER -