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6. Soil liquefaction prevention systems
Preventive measures against soil liquefaction consist in intervening in the soil to increase its resistance or drainage capacity, or to reduce the seismic action, in order to increase the safety coefficient F SL against liquefaction in the simplified approach.
They can also involve eliminating a condition conducive to liquefaction, by removing the presence of water through permanent lowering of the water table, or by replacing the soil in place with a non-liquefiable material.
Numerous techniques are in use. The structure and its reinforced zones must be considered as a whole, where masses, static forces and resistant elements coexist.
Several types of reinforcement can be considered simultaneously on a given site. The performance of the methods adopted to combat the...
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Soil liquefaction prevention systems
Conclusion
Bibliography
Websites
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AFPS – French association for earthquake engineering
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GEER – Geotechnical Extreme Events Reconnaissance
Standards and norms
- Règles de construction parasismique. Règles PS applicables aux bâtiments, dites règles PS 92 - NF P 06-013 - 1995
- Calcul des structures pour leur résistance aux séismes. Partie 5 : Fondations, ouvrages de soutènement et aspects géotechniques - NF EN 1998-5 - 2005
- Geotechnical Aspects on Site Evaluation and Foundations for Nuclear Power Plants - IAEA Safety Standards, Safety guide No. NS-G-3.6 - 2004 ...
Regulations
Environment Code
Official Journal of the French Republic
Texts on seismic zoning :
Decree no. 2010-1254 of October 22, 2010 on seismic risk prevention.
Decree no. 2010-1255 of October 22, 2010 delimiting seismicity zones in France.
Decree no. 2015-5 of January 6, 2015 amending article D. 563-8-1 of the Environment Code....
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