Bi-Elliptical DCM Tunnel Deformation Calculator
GEOTECHNICAL · TUNNEL DEFORMATION

双椭圆位移控制法隧道变形计算器 by Dr. Yang

输入隧道与施工参数,计算双椭圆变形轮廓及控制点相对位移。

Bi-elliptical DCM

输入参数

参数变化时自动更新计算结果

1. 隧道参数

m
m²
m
—

2. 隧道变形参数

3. 施工参数

%
m²

单位隧道长度:Vₛ = VL,T × A。

埋深 (H) 为地表至隧道轴线的距离;直径与面积、埋深与 H/D 可分别输入一个,另一个自动联动;VL,T 以 0–1 小数代入公式;β = 0 表示无整体竖向平移,β = 1 表示隧底保持原位。

Tunnel cross-section

隧道直径与地表至隧道轴线埋深示意

隧道轮廓与相对位移场

m
m
个
×

中心坐标用于定位隧道轮廓;控制点数量决定轮廓及位移结果的离散点数。

原始轮廓变形后轮廓(变形量 ×50显示)相对位移向量(×50)+变形前圆心+变形后圆心

默认比例为 50 ÷ 体积损失率输入值(输入为 0 时取 50 倍);箭头与轮廓使用相同比例,表格仍列实际位移。

计算摘要 实时更新

原始半径 (R)—
变形后水平半轴 (a)—
变形后竖向半轴 (b₁)—
变形后竖向半轴 (b₂)—
上竖向半轴变化量 (Δb₁)—
下竖向半轴变化量 (Δb₂)—
中心竖向平移 (c)—

控制点计算结果

θ 从局部 x 正向起算,逆时针为正。表中 X、Y 为全局坐标;ΔX = X′ − X,ΔY = Y′ − Y,|Δu| = √(ΔX² + ΔY²)。

点θ (°)X (m)Y (m)X′ (m)Y′ (m)ΔX (m)ΔY (m)|Δu| (m)

采用的公式与约定

双椭圆位移控制法示意图
双椭圆位移控制法示意图
基本几何R = D2, 中心坐标 = (Xc, Yc)
变形后水平半轴a = R √2 (1 − VL,T)n1 + n2
竖向半轴与平移b1 = n1a, b2 = n2a, c = β (b2 − R)
原始轮廓x = R cos θ, y = R sin θ, 0 ≤ θ < 2π
变形后轮廓x′ = a cos θ
y′ =
n1a sin θ + β (n2a − R) 0 ≤ θ < π(上半部)
n2a sin θ + β (n2a − R) π ≤ θ < 2π(下半部)

参考文献

  1. Yang, W., Boldini, D., & Zhang, D. (2025). Practical implementation of Bi-Elliptical displacement-controlled method in analysing shallow and large tunnel excavation impact. Tunnelling and Underground Space Technology, 158, 106266. DOI: 10.1016/j.tust.2024.106266
  2. Yang, W., Zhang, D., & Boldini, D. (2025). Development and application of the bi-elliptical displacement-controlled method for improving TBM tunnelling simulations. Computers and Geotechnics, 185, 107269. DOI: 10.1016/j.compgeo.2025.107269
  3. Yang, W., & Boldini, D. (2027). Deformation parameters for the Bi-Elliptical Displacement-Controlled Method and related tunnel deformation modes. Tunnelling and Underground Space Technology, 180, 108108. DOI: 10.1016/j.tust.2026.108108
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