Recently

to satisfy the urban traffic demand

underground track projects develop rapidly.As the influence of geological condition and surrounding environment on the engineering construction

risks of underground construction are more complicated than that of ground project.To avoid accidents happening and resulting in great loss

it is very necessary to do risk analysis and make control measures.Combined with foundation pit project of Nanjing Metro Line Two

the risk identification of subway station foundation pit is presented.By using risk index method

risk analysis and assessment is carried out on the base of risk identification

and the probability and influence of risks is defined.Some control measures to typical risks and risks of pipe line about metro station foundation pit were brought forward on the base of practice experience of constru ction

expert analysis and correlative theories.