A new treatment for preventing landslides in expansive soil slopes

Occurrence of landslides of cut slopes is an unavoidable and serious engineering problems during civil engineering construction in expansive soil areas, and for a long time there was no safe, economic and environmental protection treatment measure for the problem. As part of an expansive soils research project, properties of expansive soils, geological characteristics and features of expansive soil slope failures have been studied and analyzed. As a result a new treatment technique by reinforcing slopes with geogrid has been implemented for trial cut slopes in expansive soils in Ningming Guangxi. The effects of the new treatment technique shows that landslide problems, which once disturbed the construction of the Nan-You expressway, has been solved successfully. Properties of Ningming expansive soils, characteristics of slope failure and the new method of treatment are introduced and evaluated in the paper.