This article optimizes the construction sequence for the beam-column structure of the asymmetric double-arch tunnel in the equipment room section of a shallow-buried urban underground pedestrian passage.The proposed approach involves first construction the guide hole on the side of the large tunnel away from the small tunnel and the construction of other parts can continue.At the same time,the small tunnel is constructed,which avoids the impact of excavating the small tunnel before the large tunnel on the construction schedule,ac-celerates the construction progress,and reduces the overall construction cost.Additionally,a FLAC3D numeri-cal simulation is performed to analyze the most unfavorable working conditions for the double-arch structure,en-suring that the vertical settlement is within allowable range.To enhance safety and structural stability,the beam-column structure is strategically placed at the weakest stress point.
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