The Development Of Dynamic Monitoring And Pre-warning Systems For Slope In Yuqian Expressway

China since the mid-1980s to late highway construction into the 1990s, the rapid development of highway construction, road grade increase, in line design can no longer adhere to the "Priority Selection avoid bad" practice it is inevitable that a large numbers of the cutting excavation and the artificial slope are formed, So it is very necessary to evaluate the slope stability especially rock mass slope which is an important issue affecting the engineering construction and safe operation, and slope monitoring is one of the most important means to ensure safety, slope instability forecasting and understanding of slope instability mechanism.The dynamic monitoring and pre-warning systems for Yuqian expressway slope is a day-to-day monitoring system based on unequal interval gray system GM (1, 1) model that set integrated monitoring and pre-warning. Users will get two major functions, one as a database management system, user can use a variety of ways to entry new monitoring information, can also query and retrieve historical monitoring information and analyze measuring point's monitoring data ,combine slope geological information together for a comprehensive provide for analysis and evaluation of slope stability; The second is based on the slope displacement forecast early warning function, according to available statistics the number of landslides, Yuqin Expressway specific combination of the hydro-geological conditions, instability set a threshold, can be predicted slope instability.The situation of slope's stability affected by many factors, in order to get as much as possible information of parameters that impact slope's stability and stability characterization parameters of slope's state, as far as possible monitoring multi-parameter, multi-point measurement integrated monitoring, collecting information of multiple parameters, emplacing multi-monitoring instruments formatted a monitoring network. Given a note for the layout of the dynamic monitoring and pre-warning systems for Yuqian expressway slope in detail, established a database for monitoring data, can be used to store monitoring data to facilitate prediction of the outcome of displacement deformation comprehensive evaluation of the slope stability. Slope displacement is an important information to judge slope deformation and failure, is necessary data for a variety of Criterion forecast.Using grey theory to predict slope displacement needs less data and its calculation is simple, rapid and easy to the advantages of the software; apply to Yuqian expressway that has only just begun monitoring, the lack of historical data and the need to monitor a large number of data points measured occasions. The model was compiled to be application software, and it increased efficiency and facilitate practical application. Through the example to the slope displacement to predicting using the application software, the fitting precision was preferably, predicting the result correctly reliable, it could reflect the predicting of slope displacement objective existence and the development situation.