A Dueck

A Gens

A Lloret

A Zhou

A. E. Bond

A. P. Fraser Harris

C Gatabin

C. I. McDermott

D Gallipoli

DG Fredlund

E Romero

EE Alonso

FT Madsen

G Achari

J Rutqvist

J-S Kim

JA Blatz

K-P Kröhn

K. Thatcher

L Laloui

L Liu

M Nuth

M Sánchez

MA Celia

MT Genuchten van

Q Wang

R Pusch

RW Lewis

S Saba

S. Norris

SJ Wheeler

SS Agus

TSS Nguyen

V Navarro

WJ Likos

WMM Ye

YJ Cui

English

Hydraulic seals using compacted sand–bentonite blocks are an important part of the closure phase of deep geological disposal facilities for the isolation of many categories of radioactive wastes. An understanding of the hydromechanicalbehaviour of these seals and the ability to model their behaviour is a key contribution to safety cases and licence applications. This work reports the development of a hydro-mechanically coupled model and its application to thesimulation of a range of test conditions investigated in the SEALEX experiments conducted by IRSN at Tournemire URL. The work has been conducted as part of the recently completed DECOVALEX-2015 project. Richards’ equation for unsaturated fluid flow is coupled to a nonlinear elastic strain-dependent mechanical model that incorporates a moving finite element mesh, and calibrated against laboratory experiments. Stress and volumetric dependencies of thewater retention behaviour are incorporated through the Dueck suction concept extended to take into account permanent changes in water retention behaviour during consolidation. Plastic collapse in laboratory results is modelled with the application of a source term activated by a threshold defined in terms of the net axial stress and net suction. The model is used to simulate both a 1/10 scale mock-up laboratory test and full-scale in situ performance test and iscapable of reproducing the major trends in the data with just nine mechanical parameters and an experimentally defined stress threshold

Fraser Harris, Andrew

McDermott, Christopher

Bond, A. E.

Norris, S

Edinburgh Research Explorer

A nonlinear elastic approach to modelling the hydro-mechanical behaviour of the SEALEX experiments on compacted MX-80 bentonite

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Environmental Earth Sciences

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A nonlinear elastic approach to modelling the hydro-mechanical behaviour of the SEALEX experiments on compacted MX-80 bentonite

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Edinburgh Research Explorer

Springer - Publisher Connector

Crossref