Evaluation of pavement failure and its retrofication analysis in the north-eastern region of India

The stability of road pavement structures for highways in hilly areas of North-Eastern regions of Shillong-Silchar road poses difficult problems like land-sliding or soil-sinking disaster every year. The possible reasons for frequent pavement failures in this area have been critically assessed in this Paper. The Paper presents the results obtained from undrained cyclic triaxial tests carried out on undisturbed samples in order to investigate the effects of some factors in the liquefaction characteristics of natural soil deposits underlying the pavement structures, along Shillong-Badarpur National Highway. The type of studied soils in this mountainous terrain are sandy clay and silty clay containing some strips of silt or fine sand. The experiments that have been carried out during this study prove that the only clay specimens containing about 20 per cent of particles finer than 2 microns and having a plasticity index lower than 10 represents for some mineralogical particles alive within the given samples in respective sites are vulnerable to liquefaction. Moreover, it is also shown that the cyclic strength increases with the decrease of the void ratio and with the increase of D50. Therefore, as far as vast land-sliding or sinking concern, silty clays are more dangerous than sandy clay, in the given experimental sites. An experiment cum analytical solutions by "Orientation Method of Pavement Distortion" for preventation of this failure have also been presented and discussed for the benefit of scientists/engineers who are associated with the construction of highways in those hilly areas. The manuscript also highlights the retrofication analysis and remedial measures on the Shillong-Silchar road against both adverse climatic and geological unstable conditions so far, by Fiber Reinforced Concrete (F.R.C.), Polyster Filament along mountainous terrain and Tie Back Retaining Wall (T.B.R.W.) along valley terrain. Moreover, the paper also suggests review of the specifications presently being adopted for construction of roads of North-East (N.E.) regions of India. (A)

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/02580500
• Authors:
  • SINHA, S
• Publication Date: 2005-9

Language

• English

Media Info

• Pagination: 245-90
• Serial:
  • Journal of the Indian Roads Congress
  • Volume: 66
  • Issue Number: 2
  • Publisher: Indian Roads Congress
  • ISSN: 0258-0500

Subject/Index Terms

• TRT Terms: Clay; Developing countries; Failure; Liquefaction; Material reinforcement; Mountain passes; Pavements; Sand; Silts; Soil mechanics; Strength of materials
• Uncontrolled Terms: Particle size distribution
• Geographic Terms: India
• ITRD Terms: 4177: Clay; 150: Developing countries; 5520: Failure; 5270: Fusion; 8045: India; 2717: Mountain pass; 6200: Particle size distribution; 2955: Pavement; 9111: Reinforcement (gen); 4105: Sand; 4149: Silt; 5755: Soil mechanics; 5544: Strength (mater)
• Subject Areas: Geotechnology; Highways; Maintenance and Preservation; Pavements; I42: Soil Mechanics; I61: Equipment and Maintenance Methods;

Filing Info

• Accession Number: 01024430
• Record Type: Publication
• Source Agency: Transport Research Laboratory
• Files: ITRD
• Created Date: May 18 2006 8:54AM