CEMENT CONCRETE PAVEMENTS ON SOFT SOILS SENSITIVE TO DIFFERENTIAL SETTLEMENTS

This paper deals with pavement design on soft, compressible soils, and in particular with experiences made with cement concrete pavements (CCP) placed on such kind of soils. When dealing with this subject distinction must be made between: (1) Pavement design with respect to local influence of differential subgrade settlements affecting individual slabs; and (2) regionally influenced pavement structures. Dealing with the first subordinate problem, well tested technical solutions to prevent not only structural failures of the slabs, but also a severe reduction of riding quality and operational safety are described. The second subordinate problem deals with the phenomenon of pavements regionally influenced by the differential settlements of the soft, compressible soils on which they are placed, and describes the experiences made with a relevant number of CCPs placed on such soils in Switzerland. All mentioned Swiss pavements prove the soundness of the structural design philosophy, according to which the pavement structure's rigidity will minimize the effects of differential soil settlements to such an extent, that the magnitude of pavement deflection decreases with the creep modulus and the thickness of the pavement increasing. The most revealing example is supplied by the results gained from the observation of the long-term behaviour of the 7km (4.35 miles) long Swiss Interstate Highway N3 Flums-Sargans. These data permitted to determine the quantitative limits within which differential settlements may occur without affecting either the riding quality or the structural integrity of the pavement. (Author)

Media Info

  • Features: Figures; References; Tables;
  • Pagination: p. 201-210

Subject/Index Terms

Filing Info

  • Accession Number: 00334253
  • Record Type: Publication
  • Report/Paper Numbers: Proceeding
  • Files: TRIS, USDOT
  • Created Date: Sep 16 1981 12:00AM