Research On The Controlling System Of Large Deformation In The Soft Rock Tunnel

With the rapid development of China's infrastructure and promoting the further development of the western region, the rapid development of railway, Highway and underground Project , a lot of long and deep tunnel are starting. The soft rock and high stress areas across the body, often leads to large deformation of soft rock related to geological disasters. The reasonable effective prevention and control measures around the large deformation of the surrounding rock were looking urgent and important.Based on the well-known examples of large deformation of the tunnel analysis, from the depth of the tunnel, lithology, environment engineering and support constraints, deformation and deformation mechanism, the occurrence of the time andetc, the tunnel large deformation of the surrounding rock is defined, but also simple and intuitive judgment large deformation. To meet the needs of the large deformation, put the size of a large deformation classification standards, make judgments and predictions for the large deformation of the surrounding rock. Forecast : tunnel construction methods using geological prediction, analysis of geological conditions, numerical simulation, large deformation can be predicted in advance; Construction Monitoring Survey results predicted by large deformation. Prone to large deformation in the tunnel excavation site using a short stage, network anchor injection plus steel bracing, FLAC-3D used to excavation and support its numerical simulation, grasp deformation and the law of force. Construction Monitoring Survey conducted. Anti-rock analysis'parameters guides numerical simulation.Based to a suit of system about controlling large deformation of soft rock:tunnel Excavation, geological surveys, geological prediction, engineering analogy to judge the rock, and the numerical simulation and provide suitable excavation methods and the corresponding support measures, the construction process of monitoring and measuring times data analysis and judgment, reached rock parameters, and numerical simulation parameters contrast, spreadsheet, so close calculation engineering, construction guidance. Based Wushaoling tunnel study, practice is proved to be technically feasible and economically reasonable. It is a certain reference value to similar projects.