河南城建学院学报2025，Vol.34Issue(5)：36-43,8.DOI:10.14140/j.cnki.hncjxb.2025.05.006
盾构隧道穿越大堤风险识别及掘进参数优化研究
Risk identification and optimization of excavation parameters during shield tunneling under embankments
摘要
Abstract
In response to the issues of settlement control and construction risks in shield tunneling under em-bankments in soft soil areas,a shield tunnel-embankment fluid-solid coupling numerical model was established using FLAC3D to systematically simulate the settlement evolution and risk characteristics of the embankment during shield excavation,and to analyze the main control factors affecting embankment stability.On this basis,a multi-objective optimization method was adopted to determine the optimal combination of excavation parame-ters for shield tunneling under the embankment.The results indicate that shield excavation mainly induces ver-tical settlement of the embankment and segment convergence deformation,with the horizontal displacement of the segments exhibiting an arch-shaped distribution,the maximum occurring in the central and crown areas;pore water pressure concentrates in the upper-middle part of the excavation face,and insufficient support pres-sure will lead to an"wide top-narrow bottom"deformation pattern of the soil.The optimal excavation parame-ters obtained can significantly reduce the risk of excavation face instability,embankment settlement,and tunnel deformation.With the optimized parameters,excavation face stability is improved by 30％to 38％,tunnel de-formation is reduced by 21％to 26％,embankment deformation is alleviated by 22％to 31％,and the engi-neering risk level is lowered from Grade Ⅱ-Ⅲ before optimization to Grade Ⅳ-Ⅴ.The research results can provide theoretical basis and technical reference for risk control in similar shield tunneling under embankment projects.关键词
盾构隧道/长江大堤/风险识别/数值模拟/多目标优化Key words
shield tunnel/Yangtze River embankment/risk identification/numerical simulation/multi-objective optimization分类
交通运输引用本文复制引用
陈卫丽,李欣,周炳桦,王春草..盾构隧道穿越大堤风险识别及掘进参数优化研究[J].河南城建学院学报,2025,34(5):36-43,8.基金项目
山东省高等学校青创科技支持计划(2024KJH100) （2024KJH100）
山东省自然科学基金资助项目(ZR2024QD087) （ZR2024QD087）
自然资源部滨海城市地下空间地质安全重点实验室资助项目(BHKF2024Z07) （BHKF2024Z07）
