Research On The Deep Excavation Effect Of The Interchanging Metro Station

With the development of urban rail transit network in Shanghai, the constructionproblem of interchange connections become more and more important. At present themain difficult technology in the railway transportation construction, No longer is toguarantees the single station or the single tunnel security in the construction, but is toprotect the former line in particular the operation line in the cause of the construction.In the present, the construction effect of interchanging connection in Shanghaibecomes the most prominent difficult technical problem.In this dissertation, beginning with the segment attribute of the surrounding soildisplacement in Shanghai excavation, the monitoring data and simulate calculationsare all used, the feature of the surrounding displacement and the masking effect andthe dynamic response of the operation station will be studied and analyzed. The chiefwork is summarized as follows:1. According to investigating the national and foreign research data, based on thepractice excavation and monitoring data, the displacement zonal approach of thecourse of the excavation will be brought forward to define the near excavation.2. In view of the project characteristic and the operating station deformationlaws in influence area, from mechanics angle, the deformation laws and the dynamicendocentric force response, and the whole deformation and endocentric force of theoperating station accused by the near excavation are researched.3. Based on the difference between the excavation of the approaching operatingstation and the common excavation, in the different distance places between theoperating station and excavation, uesing the practiced monitor and the finite elementcalculation, the shade function of the operating station are analyzed. And theinfluence discrimination area which affects mutually to both is further defined and thequantification4. Take the actual construction as the background, dissect the relevantcharacteristic between the operating station and the excavation deformation, discover the advantage and disadvantage factors in the course of excavating, for providingexperiences and lessons to the similar project. Through the measured data and thetheoretical calculation result analysis, the deformation of the excavation and theoperating station deformation has carried on the analysis, confirmed the shade effectof the oparating station to the displacement and the importance to consider theoperating station dynamic response.