Abstract: Due to the advantages of the circular steel pipes with flange plates in forming underground support structures compared with the traditional pipe jacking method， it has already been used to construct urban underground spaces. However， due to the existing of the flange plates， the earth pressure around the pipe is complicated， thus the ground surface settlement during jacking process is quite different from that of the circular pipe. The effect of the earth pressure around the circular steel pipe with flange plate was studied and the ground deformation formula caused by the friction around the pipe during the jacking process was derived using the Mindlin solution based on elastic mechanics as well as the coordinate conversion theory. By taking the Olympic Sports Center Station of Shenyang Metro Line 9 as an example， the Midas finite element analysis software was used to simulate the jacking process of the circular steel pipes with flange plate. It is found that the cross-section ground surface becomes a “U”-shaped settlement groove. The surface settlement of the monitoring points at the longitudinal section gradually increases with the disturbance of the pipe jacking， and the ground deformation tends to be stable after the head of the jacking pipe exceeds the monitoring surface by the length of the pipe element. The influence of the soil cohesion and the internal friction angle on surface settlement during the jacking process was also analyzed.

Key words: pipe jacking; Mindlin solution; numerical simulation; ground surface settlement