AE distributed along the coal around the concretions intensively,and there are translation spalling,rotating spalling,loosing spalling and pressure spalling 4 overall spalling forms.

The probe on the reasons and countermeasures of filling roadbed s entire sinking;

During the designing and making of construction program,because of negligence to take proper care of the placement of large-scale vertical transport construction machinery and the installation sizes of integrated lift scaffold,as a result,it is bound to have troubles and run into bumps and collisions.

To achieve this aim,research is made to obtain the bridge integral descending technology,which is rarely encountered in the field of structural reconstruction.