KARST CAVING IN A PAVEMENT. INVESTIGATION AND REPAIR

EFFONDREMENT KARSTIQUE D'UNE CHAUSSEE - RECONNAISSANCE ET TRAVAUX CONFORTATIFS.

UNEXPECTED CAVING OCCURRED IN THE PAVEMENT NEAR THE TOWN OF BLOIS. THE 7,80M HIGH EMBANKMENT IS SITUATED ON ALLUVIAL SOIL (CLAYEY-SANDY ALLUVILIM IN THE UPPER STRATUM AND GRAVELLY ALLUVIUM IN THE LOWER STRATUM RESTING ON A BEAUCE LIMESTONE SUBSTRATUM). THE SUBSTRATUM IS HIGHLY HETEROGENEOUS AND HAS AN IMPORTANT KARST NETWORK. THREE EXPLORATORY BORING OPERATIONS WERE CONDUCTED IN THE CAVED ZONE. THEY SHOWED THAT CAVING WAS LIMITED AT THE SURFACE AND THAT BELOW THE SURFACE IT TOOK PLACE IN THE LIMESTONE ABOVE 12,70M. HYDROGEOLOGICAL OBSERVATIONS LED TO BELIEVE THAT THE ORIGIN OF THE CAVING IS TO BE FOUND IN THE HYDRAULIC CONDITIONS OF THE WATER TABLE IN THE LIMESTONE, WHICH ARE RELATED TO THE FLOODING OF THE RIVER LOIRE. REPAIR TOOK PLACE IN TWO STAGES: (1) CONCRETING BY PUMPING OF THE SUBTERRANEAN CAVITY; (2) GROUT INJECTION.

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/04585860
• Authors:
  • LORAIN, J M
  • ANGOT, D
• Publication Date: 1975-3

Language

• French

Media Info

• Pagination: 30-4
• Serial:
  • BULL LIAISON LAB PONTS CHAUSS
  • Issue Number: 76
  • ISSN: 0458-5860

Subject/Index Terms

• TRT Terms: Cement; Concrete; Grout; Karst; Landslides; Limestone; Pavements; Pumps; Repairing; Sounding
• Uncontrolled Terms: Cavities; Injection (Materials)
• Geographic Terms: France
• ITRD Terms: 5738: Cavity; 4758: Cement; 4755: Concrete; 8036: France; 4729: Grout; 3617: Injection (mater); 4381: Karst; 4029: Landslide; 4131: Limestone; 2955: Pavement; 3833: Pumping; 3635: Repair; 5720: Sounding
• Subject Areas: Geotechnology; Highways; Pavements; I61: Equipment and Maintenance Methods;

Filing Info

• Accession Number: 01307039
• Record Type: Publication
• Source Agency: Institut Francais des Sciences et Technologies des Transports, de l'Aménagement et des Réseaux (IFSTTAR)
• Files: ITRD
• Created Date: Nov 21 2010 11:04AM