Application of Tunnel Seismic Prediction in Geological Prediction in Saudi Arabia NEOM Tunnel Project
NEOM tunnel project in Saudi Arabia was constructed by drilling and blasting method and probe holes were requested for geological prediction.The construction programme of this project was very tight.The major challenge for the project was how to optimize the construction sequence and reduce the cycle time.Drilling speed of the jumbo machine was very slow,falling off of drill string and drill rod stuck happened occasionally.In order to further shorten the drilling time and guarantee the quality of advance geological prediction,the tunnel seismic prediction method(TSP)was used to replace the probe holes after comparison and discussion,and the duration of each geological prediction was reduced by 0.5 hours per cycle.At the same time,through the comparative analysis of prediction results from geological mapping,horizontal drilling and TSP,it is proved that TSP method is feasible,the prediction method combined with advanced horizontal drilling,ground survey and mapping during excavation can greatly improve the prediction accuracy of the distribution of poor geological and groundwater in the tunnel.
NETL
NSTL
万方数据
维普
