Many methods have been proposed to predict ground deformation caused by shield tunneling, but few of them provide real-time prediction because the required input parameters are difficult to determine. In this paper, a new time-dependent model of ground movement with three accessible parameters is proposed. Those construction parameters are muck discharge rate, grouting rate, and grout loss factor. The volume losses due to different construction parameters are first estimated. Then the ground deformation induced by the volume losses is calculated. The calculated result shows a good agreement with the measurement. It appears that the ground deformation is significantly sensitive to the muck discharge rate and less sensitive to the grouting rate and grout loss factor. An equilibrium relationship was found between the grouting rate and the grout loss factor, which could minimize the ground deformation at the shield tail.

已经提出了许多方法来预测盾构隧道引起的地面变形，但由于难以确定所需的输入参数，因此很少能提供实时预测。在本文中，提出了一种新的具有三个可访问参数的地面运动时间相关模型。这些施工参数是排渣率、灌浆率和灌浆损失系数。首先估计由于不同施工参数造成的体积损失。然后计算由体积损失引起的地面变形。计算结果与测量结果吻合良好。看来地表变形对排渣率显着敏感，而对注浆率和注浆损失系数不太敏感。