| expansive soil is a kind of special clay with lots of fissuring and distinguishable swelling-shrinkage characteristic, its bad engineering characteristics often leads to a variety of diseases of subgrade, of which the destruction of cut slop is especially severe and difficult to correct. It is always an engineering difficult problem that should be urgently solved that how to aim at the complicated failure mechanism, establish reasonable cut slop analyzing method and based on it to design and calculate the treatment project, Combining with the development of Western Traffic Construction Expansive Soil Project, Changsha University of Science and Technology project group has successfully use the technique of geotextile reinforcement to effectively correct Ning-ming expansive soil cut slope, but its theoretical research is relative hysteretic and the treatment mechanism of flexible supporting structure is also to be demonstrated. Therefore, this article regards the expansive soil cut slope of"Nanning-YouYiGuan"as object, carry on the cut slope stability analysis and the research of flexible treatment technique.Firstly, based on ascertain of the soil property, strength characteristic and landslide mechanism, correspondent analytical method has been set up. According to the similarity between the expanding phenomena caused by expanding soil absorbing water and the expanding effect caused by object temperature change, the simulation of expansive cut slope humidity change field has been successively realized by using temperature change field to describe the cut slope humidity change field after rainfall, making use of the heat-power coupling function of finite element analysis software ANSYS, and based on it, the stability of cut slope has been analyze by strength reduction method with FEM The result is tally with the practical situation, the problem that classical approach being difficult to consider expansive... |
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