ABSTRACT
Ground movement, which is caused by a shield tunneling in soft clay, will give birth to surface settlement of different level. When surface settlement arrives at certain level, the regular service of building and underground installation around will be influenced. Therefore, we must find out the regularity of ground movement, and more exactly predict the value, range of settlement and maximum gradient of settlement curve. Besides, in order to adopt some measures reducing ground movement during construction and design, we need to analyze all kinds of factors influencing surface settlement.
