The engineering characteristics of expansive soil were analyzed through laboratory tests based on the actual case of Yilou expressway. Treatment method was then determined by the strength level of expansive soil. During the construction of Yilou expressway, in order to make full use of local expansive soil and prevent swelling and shrinkage, it was decided to use the modified expansive soil that contains 6 percent of lime for treatment by edging method. After a centrifuge simulation test, it was found that when the thickness of the subgrade edge is 3.5 m and the filling is not higher than 6 m,...
