ABSTRACT
Based on the measured data of the foundation pit excavation project of the cross-operating tunnel in Hangzhou, the influence of the foundation pit excavation on the envelope structure, the surrounding environment and the underlying tunnel structure is analyzed. The results show that the surface subsidence curve after the wall is of groove type during the foundation pit excavation, the maximum surface subsidence is about 0.117%H, the maximum support shaft force is about 1151 kN, the overall displacement of the ground connecting wall is within 5 mm, the settlement change of the lower tunnel bed is within 10 mm, the horizontal displacement change is within 3 mm, and the selection of envelope structure is reasonable.
