IMPROVEMENT AND APPLICATION OF ANN METHOD IN STRESS AND DEFORMATION PREDICTIONS DURING TUNNEL EXCAVATION
神经网络方法在洞室施工期应力及变形预测中的应用及其改进

The stresses and deformations of rocks during tunnel excavation are predicted using an ANN approach based on results of FEM simulation. The algorithm of the BP network technique is improved appropriately. Several new improving methods are developed and lead to good results. The approach proposed in this paper can obtain more accurate and more suitable results for practical applications.