Accounting for joints effect on the failure mechanisms of shallow underground chalk quarries

Unexploited chalk quarries in North France and its region constitute a risk of damage on both people and constructions. This work aims to study the mechanical behavior of the cavities affected by presence of joints and fractures in the chalk layers. First, an oriented yield criterion based on the th...

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Bibliographic Details
Published in:Computers and geotechnics 2015-09, Vol.69, p.247-261
Main Authors: Rafeh, F., Mroueh, H., Burlon, S.
Format: Article
Language:English
Subjects:
Calcium carbonate
Chalk
Failure mechanisms
Geotechnics
Joints
Numerical modeling
Quarries
Reduction
Risk
Shear strength
Strength reduction technique
Theory of multi-mechanisms
Underground quarries
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Summary:Unexploited chalk quarries in North France and its region constitute a risk of damage on both people and constructions. This work aims to study the mechanical behavior of the cavities affected by presence of joints and fractures in the chalk layers. First, an oriented yield criterion based on the theory of multi-mechanisms is developed to account for the presence of double joint sets. Then, a shear strength reduction approach is integrated in this joint model and implemented to study the mechanical stability state of these quarries. This provides some provisions about the effect of joint characterization on strain profiles and failure mechanisms in chalk quarries.
ISSN:0266-352X
1873-7633
DOI:10.1016/j.compgeo.2015.05.008