| The western region of Hunan province includes many freeway, the landslides are distributed in wide range with various types, and due to the special nature of geological, geographical conditions and climate conditions, landslide disaster has the most direct and harmful impact on people’s life and production. The study on the monitoring prection of highway landslide disaster is one of the most urgent and important topic in Hunan province traffic construction.In this paper, the western region of Hunan Province is taken as the geological background, a full study of the specific features of highway landslide disaster is done, combined with the actual needs. The whole procedure of monitoring prection is the main line in the study, the field tests and theoretical research is taken as the study means. Finally, the complete sets of technology for highway landslide disaster monitoring and forecasting are founded. The main contents and results are as follows,(1) a comprehensive and systematic study of the Xiangxi regional landslide hazard is done, especially on the highway landslide stratum, tectonics, landform. Comprehensive analysis of the excavation induced landslides is done for common features. The main key technology for the Xiangxi Expressway Landslide Monitoring is formed, including the main monitoring method, apparatus and data acquisition technology. Summary, contrast for the landslide monitoring design points in Xiangxi Highway Survey, design, construction, and traffic operation stage are done, which can be applied to other similar characteristics of regional production practice.(2) in the practical application, the GPS integrated multisensor landslide three-dimensional automatic monitoring system is developed. Data acquisition instrument automatic collection apparatus for monitoring sensor data is stored in the data acquisition instrument within the storage unit, a data acquisition instrument and DTU transmission unit is connected by GSM card GPRS function, and the storedage unit within the monitoring data through Internet network will be transmitted to the data processing center and stored in the computer, to realize the real-time monitoring purposes.(3) a set of the basic theories and methods relatively suitable in the western region highway landslide hazard zonation is proposed, including the appraisal scope and appraisal unit method, the establishment of the evaluation index system, evaluation model selection, evaluation results of testing and reliability analysis, which can provide the basis and guidance for western area highway landslide hazard zonation. The idea of " disaster types and formation mechanism,â†'main controlling factor analysis and qualitative analogy reasoning,â†'analysis of mathematical model,â†'integrated evaluation" is put forward, to give the comprehensive analysis and evaluation for landslide hazard.(4) based on Calman filter method in the analysis of monitoring data model and program, the effect of the noise monitoring data to the monitoring results can be effectively reduced. The displacement monitoring data are divided into six types:type "D"," B"," R" type, the pendulum type,"V" type and the compound type; analysis of each kind of type curve corresponding to the landslide characteristics is done; curve fitting technique is used for quantitative description of monitoring data. The prediction model is founded based on the grey system theory, which shows great advantages in the field of deformation prediction model with small amount of data, whose results are applied successfully in Yu Huaitong high speed landslide monitoring.(5) the construction of the platform of "GIS based highway landslide disaster monitoring and prediction system" is done, and it is realized the landslide hazard safety management, monitoring chart processing, prediction analysis, landslide hazard zonation and disaster information (real-time) retrieval and query, and the application of ArcGIS ArcServer/ArcIMS technology is published to the Internet to achieve the dynamic webpage browsing. |
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