Research on Comprehensive Interpretation Technique for Tunnel Advanced Geological Prediction Data Based on BP Neural Network
In order to improve the interpretation accuracy of the advanced geological predic-tion data,a set of comprehensive interpretation rules for advanced geological prediction data of tunnels is established through a large number of forecasting practices and continuous exca-vation verification.These rules are based on the method of geological survey of the tunnel palm face,seismic wave reflection method and electromagnetic wave reflection method.A-mong then,the first-level comprehensive interpretation is based on the analysis of one index of the palm face geological compilation and four indexes of the tunnel seismic prediction de-tection,containing 70 results of the first-level comprehensive interpretation.And the second level comprehensive interpretation is based on the first level comprehensive interpretation with the addition of two indicators of ground penetrating radar detection data,which con-tains 117 comprehensive interpretation results of the second level.The second level compre-hensive interpretation is more detailed and specific than the first level comprehensive inter-pretation,which reduces the probability of the occurrence of multi-interpretation.At the same time,70 sets of training samples are selected,and Back Propagation neural network a-nalysis method is used to train the interpretation rules,forming a set of comprehensive inter-pretation techniques for tunnel over-advanced geological prediction.Taking the forecast of a highway tunnel in the Daba mountains as an application example,the forecast accuracy of the proposed method is above 80％,which proves the effectiveness of the comprehensive inter-pretation technique,and the study can provide a reference for the interpretation of the com-prehensive tunnel over-the-horizon geological prediction data.
advance geological forecastrules of interpretationBP neural networkinterpre-tation technology
NETL
NSTL
万方数据
维普
