【摘要】 从有限元数值计算的角度对岩土工程参数的可辨识性进行了分析。在可辨识性分析的基础上,考虑观测数据的不确定性,建立了在联合采用围岩位移和应力观测数据的同时,识别地应力和围岩弹性模量的反演模型。并采用约束变尺度方法求解该反演模型,获得地应力和弹性模量所在区间范围。更多还原

【Abstract】 The differentiability of the initial stresses and elastic constants of the surrounding rocks of tunnels is discussed firstly from the point of view of finite element method. An interval back analysis model is put forward to identify these parameters based on the measured data of deformation and induced stress in the surrounding rocks. The uncertain property of the measured data is considered and the interval analysis method to solve the uncertain problems is induced in the present model. The interval of the initial stresses and elastic modulus can be obtained by using the constrained variable metric method for the present model.更多还原