Study On The Rational Excavation Sequence Of Deep Buried Perpendicular Tunnel In Beijing

The paper analyzed the different excavation sequences "the upper tunnel first" and "the lower tunnel first" under the same conditions, either surface subsidence shape and curve or moment of the preliminary lining, "the upper tunnel first" excavation sequence was the better by comprehensive comparison, so "the upper tunnel first" was the more reasonable excavation sequence, which could provide technical support to the related project, and provide cross-reference the tunnel excavation experience which has a similar geological conditions as Beijing.