Study on the Influence of Surface Clearing and Construction of Complex Structures on the Safety of Existing Tunnels
In the process of railway tunnel construction,more research and attention have been paid to the construction of new tunnels under crossing existing structures,focusing on the analysis of the structure and safety impact of the new tunnel on the existing upper structure and how to protect the upper structure.However,there is a lack of attention paid to the impact of the surface clearing works above the already built tunnel on the existing tunnel structure and operation safety.Combined with the actual engineering case of Ranjiawan tunnel project in Miyi to Panzhihua section of Chengkun-Kunming Railway,the structural displacement and internal force changes caused by the leveling and clearing of the surface construction site after tunnel excavation and support are calculated and analyzed by using FLAC3D finite element analysis software.
surface clearanceexisting tunnelstructural displacementinternal force change
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万方数据
