Service Performance Evaluation of Protection Project of Collapse Based on Intelligent Monitoring Technology
In highway engineering,the high and steep slope with rock joint fissure development and severe weathering,the shallow rock masses are mostly fragmented.Collapse and Rockfall occur with high frequency,great contingency and high speed.The passive flexible protective net is widely used because of its superior performance.Taking a slope on the Beijing-Kunming Expressway as the research object,the Rocfall software was employed to simulate movement charac-teristics of Rockfall,evaluate and analyze the protection performance of passive protective net.Meanwhile,the automat-ic monitoring data was comprehensively analyzed to put forward the evaluation methods for the service performance of the protective net during its operation.The results show that:(1)Without any protection,area A and B have 29.4％and 92.9％probability of falling to the connection line and causing damage,respectively.(2)After the installation of the pas-sive protective net and the stone wall,the protection effect is obvious,and the interception success rate reaches over 99.8％.(3)When the mass of the fallen rock is less than 1 000 Kg,the current passive protective net can effectively inter-cept it.(4)The deformation law of passive protective net was obtained by automatic monitoring technology,and the cur-rent protection state was evaluated as good from pull line displacement and dip deformation,but the falling rocks needed to be cleaned in time.The research findings provide significant references for the protection design of slope rockfall di-sasters and the performance evaluation of the protective net.
NETL
NSTL
万方数据
