Informationization Construction Numerical Simulation Of Cavern Group In Underground Hydropower House

With the level of human engineering technology and continuous improvement, underground project has been rapid development,the ground floor of a growing number of projects,increasing scale,Out of underground construction safety and economic considerations, must take an effective approach to security,after the exploration of long-term research,New Austrian Tunneling Method based on the concept of underground construction works,works to achieve safety and conservation of the relatively good economic results.NATM construction technique of the three pillars Shotcrete,bolt reinforcement and measurement technology,through these three technologies to protect the surrotmding rock,as far as possible the original strength,allow the surrounding rock deformation relaxation without causing excessive damage,timely information on the structure of surrounding rock and support, such as degenerative conditions of the target,through information-based simulation of construction is the realization of this idea the best way to work.In this paper,ANSYS as a platform for the establishment of pre-processing finite element model and mesh,application of self-process into FLAC^3D to FLAC^3D calculated as a platform for underground caverns for the construction of numerical simulation information.First of all,combined with the measured stress data,established a three-dimensional nonlinear finite element model,simulation of the fault and fracture density zone;for different stress field,FLAC^3D procedures used to solve Neural network analysis of samples obtained.The use of additional momentum on the initial stress field simulation;Displacement back analysis method used,to determine rock parameters,through simulation of the rock excavation for the sensitivity analysis parameters,come to affect the stability of surrounding rock of the sensitivity factor.Combination of construction and monitoring of information,construction steps in accordance with the construction of the caverns simulation,according to monitoring data for a layer of rock parameters spreadsheet analysis,and the use of selected parameters to predict the next excavation,monitoring data and statistical analysis,prove the accuracy of predicted results meet the requirements of obtained show that calculating the parameters of rock is to meet the project accuracy requirements.Stress field by the inversion parameter inversion results and the results of rock underground powerhouse cavems of the information construction of simulation, according to the construction stepsBolting and Shotcreting on,prestressed cable anchorage to carry out simulation,of the stress caused by excavation,Re-distribution of displacement,as well as the distribution of plastic damage zone analysis,and engineering guidance draw reliable conclusions of value.