基于半无限平面隧道渗流场解析解的青岛地铁涌水实用预测公式研究

Research on Practical Prediction Formula of Qingdao Metro Water Gushing Based on Analytic Solution of Seepage Field of Semi-infinite Plane Tunnel

鉴于目前并无适用于城市轨道交通工程隧道涌水量的预测模型,本文依托青岛3号线隧道开挖工程,基于圆形断面隧道整体衬砌的轴对称解析解计算涌水量,为使其能有效应用于实际工程中,利用MATALB进行实测数据拟合,得到基于理论解析解计算隧道涌水量与结合实测涌水量统计并适用于青岛地铁3号线的全包防水设计的地层围岩等效渗透系数kr和衬砌等效渗透系数k1。为了验证计算模型的准确性,利用简化公式进行实际某段隧道开挖涌水量的计算,验证了修正后的简化计算方法在青岛地区地铁隧道涌水量预测的准确性。

Given the current model is not suitable for calculating tunnel gushing of metro construction project,relying on tunnel excavation engineering of Qingdao M3 and analytical solutions of axisymmetric circular section tunnel,we put forward a new theory to forecast tunnel water inflow,in order to make it could be applied in practical project efficiently,we use MATALB data fitting to obtain the analytical solutions which based on the theoretical calculation of tunnel water inflow and the practical measured water inflow statistics.The solution is which means equivalent permeability coefficient of surrounding rock,which means equivalent permeability coefficient,kr k1 is also suitable for the joint waterproof design of Qingdao metro M3.In order to verify the accuracy of the new calculation model,the simplified formula is used to calculate the actual water inflow during tunnel excavation,and the accuracy of the revised simplified calculation method in forecasting the tunnel water inflow in Qingdao area is also verified.