公路隧道建设中涌水量预测方法改进研究仿真

发布时间：2018-07-10 17:01

本文选题：公路隧道 + 涌水量　；参考：《科学技术与工程》2017年04期

【摘要】：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。
[Abstract]:Most of the current forecasting methods are based on the observed data of the accumulated water inflow of the tunnel which needs accurate prior knowledge and the prediction results are not reliable. An improved method of water consumption prediction in the construction of highway tunnel is put forward, and the process of water gushing in highway tunnel is analyzed. According to the hydrogeological conditions of the highway tunnel, the steady flow model before tunnel excavation is constructed according to the regional hydrogeological conditions of the highway tunnel under study. The model was tested according to borehole data and spring discharge, and applied to the prediction of water discharge. The steady flow model is regarded as the initial condition of the unsteady flow in the excavation of highway tunnel. The simulation of the water inflow during the excavation of the highway tunnel is completed, and the maximum water inflow, the normal water inflow and the water inflow process curve are obtained. The variational finite element method is used to solve the above model, and the permeability coefficient and the influence radius are determined, so as to calculate the forecast value of water inflow in the construction of highway tunnel. The experimental results show that the proposed method has high prediction accuracy.
【作者单位】：四川大学锦城学院;中国市政工程西南设计研究总院有限公司;
【分类号】：U452.1

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