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Comparison of shallow tunneling method with pile and rib method for construction of subway station in soft ground

Frontiers of Structural and Civil Engineering 2022年第6期16卷 704-717页

作者： Sina AMIRI Ali Naghi DEHGHAN Department of Mining Engineering Science and Research BranchIslamic Azad UniversityTehranIran

In the present study,a comparison between the new shallow tunneling method(STM)and the traditional pile and rib method(PRM)was conducted to excavate and construct subway stations in the geological conditions of ***,by selecting station Z6 located in the Tehran subway Line 6 as a case study,the construction process was analyzed by *** maximum ground settlement of 29.84 mm obtained from this method was related to the station axis,and it was within the allowable settlement limit of 30 *** acceptable agreement between the results of numerical modeling and instrumentation data indicated the confirmation and accuracy of the excavation and construction process of station Z6 by *** the next stage,based on the numerical model validated by instrumentation data,the value of the ground surface settlement was investigated during the station excavation and construction by *** results obtained from STM showed a significant reduction in the ground surface settlement compared to *** maximum settlement obtained from STM was 6.09 mm as related to the front of the excavation ***,the sensitivity analysis results denoted that in addition to controlling the surface settlement by STM,it is possible to optimize some critical geometric parameters of the support system during the station excavation and construction.

关键词： shallow tunneling method pile and rib method ground surface settlement subway station construction numerical modeling

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