The overall size and total quantity of urban underground space in China have been leading in the world at present [1]. With rapid development of city construction in China, a large number of high-rise buildings and underground space development and utilization make deep excavation engineering substantial increased. Because the design theory and calculation method is still not perfect and there are many uncertainties in construction, deep excavation engineering is always in great risk. The construction accidents of deep excavation engineering in the densely urban areas not only affect its own security, but also bring disaster to the safety of surrounding buildings, roads and pipeline. It will cause significant economic losses and social impact. As a result, the research on risk of deep excavation engineering has become one of the issues to be settled urgently. We will established a feasible risk management system of deep excavation engineering through the study on risk identification, risk estimation, risk assessment and risk control based on monitoring.
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