Evaluation on Stability and Improvement for the Expansive Soil Roadbed Filling

Abstract

The improvement of expansive soil is one of the important contents in the field of engineering construction. On the basis of the test section of a highway, three kinds of modified schemes (lime soil, geotechnical fabric and geotechnical grille) were used to improve the embankment filling of expansive soil in the thesis. Through the field test and software analysis, it is found that the three schemes can meet the requirements of embankment stability, among them, the safety factor of the geotechnical material improvement test section is higher than that of the lime soil improvement test section, and the reinforcing effect is more remarkable. The geotechnical material modification method is a rapid, economical and effective technique for improving the expansive soil embankment, and the method is worth promoting vigorously.