基于GIS的公路边坡危险性分析与预警系统研究

Research on GIS-based highway slope risk analysis and early warning system

从宏观方面,针对滑坡易发性区划,选择高程、坡度、岩性、地质构造、铁路建设和年均降雨量6个致灾因子及其二级指标建立滑坡敏感性区划研究体系,以主客观综合权重方法为原型构建滑坡敏感性区划GP模型,并发布为网络服务,在WebGIS系统中调用该服务自动编制滑坡敏感性区划图.从微观方面,针对单体边坡,使用地理力学方法对边坡的稳定性进行计算与分析.然后根据已有监测数据,运用预测模型,判断滑坡所处阶段,确定滑坡预警级别.该文将地质灾害宏观区划与单体边坡稳定性分析以及监测预警相结合,运用到公路边坡信息管理系统中,从而实现对公路边坡的危险性分析和灾害预警.

To research on the landslide susceptibility mapping, a Subjective and Objective Weighting Method-based landslides susceptibility mapping GP model was estab- lished. The model was based on the landslide susceptibility mapping research system and formed with six disaster-induced factors （elevation, slope, lithology, geological structure, railway construction and average anural rainfall） and their secondary indexes. This model was published as a web service which can draw landslides susceptibility map automatically in WebGIS while called. To study the individual slope, the instability risk was predicted by analyzing and calculating the landslides stability with geological me- chanic methods. Then according to the monitoring data, the deformation stage can be judged and the warning level of landslide can be determined with the prediction models. In summary, we conbined the geological hazard macroscopic mapping and individual slope stability analysis with monitoring and warning and applied them to the highway slope information management system in highway slope risk and warn the hazard. this paper, which will successfully analyze the