The project of ‘Deformation Analysis and Treating Techniques of Multi-mined Out Layers with Full Water under Freeway’ was jointly performed by Geotechnical Engineering Institute in Southeast University and Freeway Construction Headquarters of Jiangsu province. The project was authorized by Transport Bureau of Jiangsu Province.

       The deformation analysis methods and treating techniques of mined-out area were investigated to ensure the construction quality. The achievements obtained in this project can be applied for other similar ones.

       Main achievements are as follows:

       ☆ Exploration techniques of multi-layer mine-out area with full water under freeway;

       ☆ Deformation analysis methods of multi-layer mine-out area under freeway;

       ☆ Design and construction techniques of treating mined-out area;

       ☆ Techniques of quality verification of treated mined-out area.