Citation

Blacklock JR, Wright PJ. Transp. Res. Rec. 1986; 1104: 7-18.

Copyright

(Copyright © 1986, Transportation Research Board, National Research Council, National Academy of Sciences USA, Publisher SAGE Publishing)

DOI

unavailable

PMID

unavailable

Abstract

Restoration of failed soil embankments along the Interstate highway system is a costly and time-consuming maintenance problem for many state highway departments. Unfortunately, few economical or easy solutions are available for repair and improvement of these failed earth embankment sections. In extreme cases highway bridges have been removed and the earth cross-sectional designs changed because attempts at solving existing bridge embankment slope failures were unsuccessful. In related studies to evaluate a new solution for this problem, Alabama, Arkansas, and Missouri have recently installed full-scale highway embankment test sections using the lime and lime/fly ash injection method of in situ soil stabilization. Presented in this paper is a discussion of the lime and lime/fly ash injection technology necessary for stabilization and restoration of typical failed embankment slopes. Also addressed are lime and lime/fly ash laboratory testing, injection materials selection, injection construction technology, and site evaluation. The first two highway embankment injection-stabilization projects were installed in Alabama and Arkansas in 1983. These are presented in a detailed case study format and their relative degree of success is docmented after 2 years of service. The Missouri site stabilized in 1984 is also discussed and a preliminary assessment of its success potential is included. Discussed are the injection-stabilization evaluation techniques that have been derived from these demonstration projects, and suggstions for improvement of future projects are offered.

Language: en

Keywords

HIGHWAY SYSTEMS; HIGHWAY ENGINEERING - Project Management; SOILS - Stabilization