Displacement Back-anlysis Based On Principle Of Experiment Design & Simulation Of Construction Process

The multi-parameter's elastic-plasticity optimizational back-analysis means approaching to the superior result by a large amount of pilot calculation. Similarly we can achieve the goal of optimizing and seeking the superior result by optimizing the test scheme. The uniform experiment has the advantages to cover wider range of the object parameters. The orthogonal experiment can find the optimizational parameter combination. This paper focuses on the introduction of the uniform experimental design and the orthogonal experimental design in elastic-plasticity optimizational back-analysis and has obtained several achievements as follows:1) It had been developed the object function of the multi-parameter's elastic-plasticity optimizational back-analysis, put forward an approach of pilot calculation optimizing scheme combining the uniform experiment with the orthogonal experiment.2) It had been developed the numerical calculation model of the complex underground cavern excavation step by step.3) A back-analysis based on acturally messured displacement curve had been carried on and the equivalent mechanical parameters of the wall-rock.4) By means of numerical simulation, the overall displacement curve in the excavating process of the underground factory building had been achieved.5) The influence factors of the wall-rock deformation had been achieved by the comparation between the calculation results and the actually measured data.