Abstract:

Soft soils in ravines is a weak soil layer widely distributed in the valleys and gullies, the deformation of which has a direct impact on the settlement of the roadbed. On the basis of sampling at the scene and by using a variety of laboratory test means, we did some indoor rheological experiments to some sections’ soft soils of Heng-Yan highway, and then found several rheological constitutive models that are in keeping with the rheological characteristic of ravine soft soils by analyzing the rheological curve.At the end, we obtainde the model parameters by method of undeterminated coefficients. The deformation characters of three types of soft soils in ravins have been gained by tests. This paper will give some references for the handling of ravine soft soils in filling roadbed and the evaluation to the roadbed settlement after construction.

Key words: ravine soft soils, indoor rheological experiments, constitutive models, model parameters