Abstract:

The successfully monitoring and early warning for highway slope in operation period are not common though the highway landslide is the common disaster. The main reason is that the highway slope has the characteristics including spot distribution along road, long interval, small scale, large quantity and lack of statistics, which cause the high monitoring costs and difficult early warning. In this paper, the wire pulling displacement meter with the precise of 1 mm is used to monitor the surface displacements of landslide, and the GPRS net of China Telecom is applied to transform the monitoring data; the whole system has high automation and low cost. Meantime, the FEM software PLAXIS is used to conduct the strength reduction analysis and plastic analysis. Based on the calculation results with different parameters, the relationship between the slope safety factor and surface displacement is established in lack of the strength parameters, permeability and soil water characteristic curve; and the corresponding early warning measures are proposed according to the change of surface displacement. This method has been applied to a highway landslide in Hunan province.

Key words: highway landslide, surface displacement monitoring, PLAXIS, early warning