公路隧道建设中涌水量预测方法改进研究仿真

当前涌水量预测方法大多依据已经建好的隧道积累涌水量观测资料进行预测,需要准确的先验知识,预测结果不可靠。提出新型公路隧道建设中用水量预测改进方法,分析了公路隧道涌水过程,针对研究的公路隧道,依据建设公路隧道区域水文地质条件,构建隧道开挖前的稳定流模型。依据钻孔数据和泉流量对构建的模型进行检测,将其应用于涌水量的预测中。将稳定流模型看作公路隧道开挖的模拟非稳定流初始条件,完成对公路隧道开挖过程中涌水量的模拟,获取公路隧道的最大涌水量、正常涌水量和涌水过程曲线。运用变分有限单元法求解上述模型,确定渗透系数和影响半径,从而计算出公路隧道建设中涌水量的预测值。实验结果表明,所提方法具有很高的预测精度。

In the construction of highway tunnel water inflow forecast methods to improve simulation research

Most of the current water inflow forecast method based on accumulation has built tunnel water inflow observation data to predict, need accurate a priori knowledge, predicted results is unreliable.Put forward the new water consumption forecast improvement methods in the construction of highway tunnel, and analyzed the process of highway tunnel water gushing, according to research of highway tunnel, based on the construction of highway tunnel regional hydrogeological conditions, the construction of tunnel excavation in front of the steady flow model, on the basis of borehole data and spring discharge detection for the construction of the model, applied to the prediction of water inflow.The steady flow model of unsteady flow as the simulation of highway tunnel excavation initial conditions, finish the water inflow in the process of highway tunnel excavation simulation, obtain the maximum water inflow of highway tunnel, the normal water inflow and water process curve.Using the variational finite element method to solve the above model, permeability coefficient and the radius of influence is determined, and the construction of highway tunnel water inflow is calculated forecasts.The experimental results show that the proposed method has high prediction accuracy.