考虑到位移反演单一控制条件的局限性,文章提出基于位移-应力的多元信息联合智能反分析方法.该方法基于差异进化算法(DE算法)的控制变量少、收敛速度快、适应性强等诸多优点,将自动化采集系统与三维数值模拟相结合,对隧道施工过程进行实时监测、反馈、分析.文章以抚松隧道工程为例,首先根据抚松隧道的地质和施工设计特点,在ZK276+354断面处布设传感器,采集施工过程中的测点位移、应力等数据;然后建立复杂三维精细化数值模型,设计25组正交方案进行正算,通过极差分析和拟合方法建立围岩各参数与位移值、应力值之间的映射关系回归模型;联合传感器监测数据和常规监测数据进行位移-应力反分析,搜索获得准确的围岩力学参数.结果表明该联合反演方法可以为隧道施工安全提供重要参考.%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 construc?tion based on the advantages of fewer control variables, rapid convergence and strong adaptability of difference evo?lution algorithm (DE). Taking the Fusong tunnel as an example, sensors are set at section ZK276+354 to collect dis?placement information during construction at the measuring points considering the geological conditions and con?struction 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 param?eters 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.
展开▼
