Abstract：
Considering the limitation of the single controlling condition of displacement inversion, a multi-informa?
tion based intelligent back- analysis method is presented, which combines an automatic acquisition system with three-dimensional numerical simulation to perform real-time monitoring, feedback and analysis of tunnel construction based on the advantages of fewer control variables, rapid convergence and strong adaptability of difference evolution algorithm (DE). Taking the Fusong tunnel as an example, sensors are set at section ZK276+354 to collect displacement information during construction at the measuring points considering the geological conditions and construction design. Using that data, a complex 3D numerical model is established, 25 sets of orthogonal schemes are designed to conduct forward calculations, a regression model is set up to show the relationship among various parameters of the rock mass and displacement and stress using range analysis and the fitting method, displacement-stress back analysis is carried out based on sensor data and routine monitoring data and accurate mechanical parameters of the surrounding rock are obtained.
2017, Vol. 54 