Analysis of Expansion Characteristic of Expansive Soil Based on Flexible Supporting Structure of Expansive Soil Subgrade
LI Yan-yan;Fujian College of Water Conservancy and Electric Power;
Expansive soils have obvious dry shrinkage and bulking, and its expansive force occurs once deformation is blocked, which results in the serious damage of highway structures. The flexible supporting technology solved the global technical problems of expansive soil sugared successfully. To deeply investigate its working mechanism and perfect the design theory, it is very necessary and exigent to find out the interaction relationship between soil deformation and expansive force. Therefore, this paper performs the experiment of expansive soil to get the expansibility of vertical and radial expansive force and analyzes the changing rule of the dry density and the moisture content, and researches the relationship of vertical expansion force and radial force and the expansive force attenuation when small vertical or radial deformation was allowed, and at the same time discusses the primary application of experiment result in flexibility supporting structure.
【CateGory Index】： TU443;U416.167