Measurement and Analysis of the Effect of Shield Tunnelling of Hangzhou Subway on the Adjacent Building

The tunnel at a segment of Line No. 1 of Hangzhou Subway was constructed by dual-line horizontal parallel shield tunnelling and adjacent buildings were affected. Onsite measurement was conducted on the settlement of building and ground surface during the construction process of dual-line shield tunnelling. With regards to the data of shield tunnelling system, the measured data of settlement of the building and ground surface are analysed to study the pattern of settlement of the building due to dual-line shield tunnelling. Studies have shown that the settlement of structures can be effectively controlled by controlling the amount of grouting and soil excavation during shield tunnelling; structures have large stiffness and displacement coordination would occur when deformation happens. At the meantime, the soil consists of discrete individuals. Therefore, the displacement of buildings due to shield tunnelling is less than the displacement of adjacent soil.