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应用GIS技术开发海底隧道施工涌水预报系统,实现涌水量动态预测,为施工安全提供技术决策。研究中涌水量的预测采用了解析法和数值模拟方法。技术路线为根据工程施工前的地质勘探资料,进行隧道的涌水量预测,其成果作为背景数据库存放在评价系统中。结合隧道施工过程中的地质信息和地下水信息,对涌水量模型参数进行修正,利用修正后的参数,更新涌水预测评价的基础数据库,以更新后的结果作为施工前方涌水量预测结果。系统实现了海底隧道涌水的动态预测,在厦门海底隧道工程施工应用中表明:系统可为隧道安全开挖中的探水工作提供相对正确而直观的水文地质依据和工程技术保障。
The application of GIS technology to develop subsea tunnel construction water inflow forecasting system to achieve the dynamic prediction of water inflow, to provide technical decisions for construction safety. The study of gushing water prediction using analytical methods and numerical simulation methods. The technical route is to predict the water inflow of the tunnel according to the geological exploration data before construction, and the results are stored in the evaluation system as a background database. Combined with the geological information and groundwater information in the process of tunnel construction, the parameters of the water inflow model are modified, and the revised data are used to update the basic database of water inrush prediction and evaluation. The updated results are used as the prediction results of water inflow in front of the project. The system realizes the dynamic prediction of the water inflow of the subsea tunnel. The application in the construction of the Xiamen subsea tunnel shows that the system can provide relatively correct and intuitive hydrogeological basis and engineering technical support for the water exploration in tunnel safety excavation.