Displacement Back Analysis for Rock Parameters of Deep Foundation Pit
Numerical analysis is effective means to evaluate deep excavation influence in the sensitive environmental condition, and it is key issues to choose the elastic modulus of rock parameters reasonably. Based on the finite element theory, the relation between rock mass elastic modulus reciprocaland and the objective function value is a quadratic function in the elastic zone of multilayer layers, and then the optimal value of elastic modulus is obtained by polynomial interpolation method. Combined with the practice engineering, the elastic modulus of rock mass excavation is back calculated in the sensitive environmental condition and the effects of excavation are evaluated on the surrounding tunnel. The results show that the method is more convenient, and provide a reference for foundation pit construction.
Z. H. Jiang and Y. X. Zhang, "Displacement Back Analysis for Rock Parameters of Deep Foundation Pit", Applied Mechanics and Materials, Vols. 94-96, pp. 230-234, 2011