2D与3D模型预测石太客运专线特长隧道涌水量

Prediction of Water-gushing Volume of Super Long Tunnel on Shijiazhuang-Taiyuna Passenger Dedicated Railway Line with 2D and 3D Models

研究目的:目前较为常用的隧道涌水量的预测方法为专业理论方法,其精度不高。为此,利用计算机技术来寻求新的方法,并预测石太客运专线特长隧道涌水量,从而指导现场施工。研究方法:理论模型与2D、3D数学模型相结合,合理设定边界条件使数学模型接近实际情况。研究结果:利用有限单元法建立二维与三维预测结果互相吻合,且与现场观测数据非常相近。研究结论:本预测方法具有指导现场施工的作用,对同类地区的隧道涌水量计算有借鉴意义。但三维数值模型预测的隧道涌水量值都小于二维数值模型的预测值,这主要是在对单元划分处理时偏于简单化所致,需在以后的工作中对程序做进一步改进。

Research purposes： Nowadays the professionally theoretical method is still common used for prediction of water - gushing volume of tunnel with low precision, so it is necessary to seek a new method of predicting the water - gushing volume of super long tunnel on Shijiazhuang - Taiyuna Passenger Dedicated Railway Line with computer technology for the purposes of directing the construction. Research methods：With the integration of theoretical model with 2D and 3d mathematical models, rational setting the boundary conditions makes the mathematical models close to real conditions. Research results：The predicted results obtained by 2D and 3D models with finite -element method are matching each other and very close to the observed data on site. Research conclusions：This prediction method can direct the construction and provide the reference to the calculation of water - gushing volume of the tunnel in the similar areas. However, the value of water - gushing volume predicted with 3D model is smaller than that with 2D model because of simplifying classification of units, so the improvement of the program will be made in future.