Abstract:

The difficulties of the mined section of Beijing Rail Underground Transit Project are analyzed, the optional construction methods are compared and in the end pilebeamarch (PBA) method is adopted. The application of pilebeamarch method in the construction of the urban large crosssection mined tunnel adjacent to buildings is presented. In the end, good results have been achieved.

Key words: large crosssection mined tunnel, pile beam arch (PBA) method, ground surface settlement, deep grouting