A Research of Environmental Influencing Factors for Deep Foundation Pit Projects in Soft Soil Area in Shanghai

At present,five adjectives,deep,large,close,difficult risk,can describe the trend of underground engineering construction develop-ment in Shanghai area.The deep foundation pit projects cannot avoid negative influences on the surroundings determined by the regional geological conditions.Combined with daily deep foundation pits review works and a large amount of accidents management examples,the regular influencing factors during the construction period are identified and summarized.In the meantime,some suggestions are proposed to focus on the management and to lower the environmental influence as far as possible.