Abstract：At present, urban underground space development dominated by rail transit construction has entered high tide in China. In the construction of urban underground engineering, due to the complexity of urban environment, route planning and construction time sequence, the situation of tunneling crossing existing buildings is inevitable. The impact and its safety control of urban tunnel construction crossing existing structures are analyzed systematically. The dynamic interaction between ground and structure is explained and defined. Based on stress and deformation responses of different structures, their safety responses are analyzed. According to the high risk in crossing construction, the engineering safety risk control system with strata deformation control as the core is established, and the corresponding control process and technology model are formed.
