Abstract:

Daping inclined shaft of Muzhailing tunnel on LanzhouChongqing railway passes through carbonaceous slate and carbonaceous shale ground with high ground stress. Due to the geological reasons, large convergence deformation occurs during the construction of the inclined shaft. The control of the large deformation occurring during the construction of Daping inclined shaft in carbonaceous slate ground is presented and the reasons for the deformation, the construction principles in the sections with large deformation and the deformation control technology are analyzed in the paper.

Key words: tunnel, inclined shaft, carbonaceous slate, high ground stress, large deformation