为研究紧邻地铁隧道钢护筒振动下沉施工对周边环境的影响，依据现场试验建立了紧邻地铁隧道区域钢护筒下沉的三维离散-连续多尺度耦合数值模型并将计算结果与测试结果验证对比，分析了周围土体和盾构隧道的响应，并进一步分析了影响钢护筒下沉时对地铁隧道变形的因素。结果表明，钢护筒下沉会引起有隧道侧和无隧道侧土体位移和孔隙水压力的非对称响应，处于隧道埋深范围内的土体，有隧道侧的土体侧向位移会明显受到限制，超孔隙水压力明显增大；隧道水平向和竖向的收敛变形在沉桩深度达到隧道底部埋深附近时达到最大；隧道水平向和竖向的最大收敛变形均会随着桩与隧道间距的增大而快速减小，而隧道收敛变形会随地铁隧道埋深的增加而增大。

Aiming to study the environmental effect of steel casing vibratory driving construction adjacent to metro tunnels, a 3D discrete-continuum multiscale coupled numerical model was established and validated against field test results. Analyses were conducted on the response of the surrounding soil and the shield tunnel. Furthermore, factors influencing the deformation of metro tunnels during the vibratory driving process were analyzed. The results show that vibratory driving induces asymmetric responses in soil displacement and pore water pressure between the tunnel side and non-tunnel side. Within the tunnel burial depth range, lateral displacement of soil on the tunnel side is significantly constrained, while excess pore water pressure markedly increases. The horizontal and vertical convergence deformation of the tunnel reach their maximum when the driving depth approaches the tunnel bottom burial depth; The horizontal and vertical maximum convergent deformation of the tunnel decrease rapidly as the distance to the pile increases. Concurrently, tunnel convergence deformation increases with greater metro tunnel burial depth.