Environmental and Other Criteria and Methods for Pavement Design.
Abstract
Results of an extensive series of repeated load triaxial test on Dublin Brown glacial till are reported. Charts are presented relating the relevant parameters of the till to dry density and moisture content. The effect of stress history is studied. The results indicate that modifications are required to the Kirwan-Snaith nomograph and suggest that the subgrade strain design criterion should vary with the stiffness of the soil. A recently developed low cost pneumatic repeated loading test apparatus is described. Skempton's A and B pore parameters have been used to interpret the response of samples under repeated loading. A method of determining a stress-dependent resilient modulus by prepared charts from in situ tests on a subgrade is described. Results of laboratory pavement simulator tests on subgrade are compared with those obtained on undisturbed samples and with these results of the repeated loading, testing program. Modifications to DEFPAV which are required in order to include horizontally layered anisotropy are described. Initial results from a testing program to investigate the properties effecting the behaviour of natural gravels in road pavements are presented. Two computer subroutines for optimization of road pavement design are described. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Feb 01, 1979
- Accession Number
- ADA084135
Entities
People
- E. R. Farrell
- M. L. Maher
- R. W. Kirwan
Organizations
- Trinity College Dublin