摘要
A simple testing method for secondary or induced stress of surrounding rockwas presented by laboratory experiment, numerical simulation and in situ testing based onthe basic principle of the historical stress restoring method.First, stress equivalent coefficient,which key coefficient of stress restored testing, was obtained by laboratory experiment.Second, experimental results were examined using 3D finite element numericalanalysis and the influence factors were analyzed by 2D finite element numerical analysis.The correctness of induced stress measuring results in situ for highway tunnel wereproved by elastic mechanics theory solution and single-hole stress rescission method.Thenew simple method of induced stress measuring has important practical value for undergroundengineering induced stress field analysis.
A simple testing method for secondary or induced stress of surrounding rock was presented by laboratory experiment, numerical simulation and in situ testing based on the basic principle of the historical stress restoring method. First, stress equivalent coeffi- cient, which key coefficient of stress restored testing, was obtained by laboratory experi- ment. Second, experimental results were examined using 3D finite element numerical analysis and the influence factors were analyzed by 2D finite element numerical analysis. The correctness of induced stress measuring results in situ for highway tunnel were proved by elastic mechanics theory solution and single-hole stress rescission method. The new simple method of induced stress measuring has important practical value for under- ground engineering induced stress field analysis.
基金
Supported by the National Natural Science Foundation Special Originality Innovation Research Colony of China(50621403)
