Analysis of factors affecting arch crown settlement caused by double line shield tunnel crossing gob area
During the construction of double line shield metro tunnel,when passing through the gob area section during construction,and due to the reactivation of the gob area,the settlement of the arch crown is greater than that without the gob area.To explore the principal influence factors causing arch crown settlement and their primary and secondary relationships,this article relies on the Guangzhou metro line 12 project and uses FLAC3D numerical simulation software for hypothetical simulation.During the process of the research,the focus is on analyzing the three influencing factors of gob area burial depth,thickness and length,and draws many principal conclusions.The primary and secondary relationships between the influencing factors is:the depth of burial is the most critical,followed by the length,and finally the thickness.The research results can be applied to practical engineering projects,especially in the key processing link during the construction of tunnel,providing important reference value for the construction of double line shield tunnel.
metrodouble line shield tunnelgob areainfluence factor
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