In metro tunnel construction,the double-line synchronous construction method is widely adopted to improve construction efficiency.However,while this approach accelerates the process,it may increase soil disturbance,especially in complex and variable geological conditions such as soft soil,potentially endangering construction safety.This article takes Xiamen metro line 3 as the research object,utilizing ABAQUS finite element simulation software to simulate several different construction scenarios of shield tunneling,namely single-line excavation and double-line synchronous excavation with varying distances.By combining field monitoring data,the model's reasonableness was verified.At the same time,the impact of different construction scenarios on the cross-sectional changes of the soil surface and the settlement along the excavation direction was analyzed.The results indicate that when the double-line synchronous excavations distance is maintained at more than 30 meters,surface settlement is effectively controlled,and the impact degree is significantly reduced,remaining within a safe and acceptable range.The relevant research could provide reference and inspiration for other similar construction projects.
关键词
地铁/同步施工/软土地层/有限元模拟/地表沉降
Key words
metro/synchronous construction/soft soil layers/finite element simulation/surface settlement
维普
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