Study On Slope Stability Monitoring And Early Warning Based On High Density Resistivity Method

The geological hazards caused by the instability of the slope can pose a threat to the safety of life and property of the human,and restrict the economic development of our country.In view of this,the paper probes into the construction of the slope stability monitoring and early warning system based on the high-density resistivity method from the practical point of view of the project.The following four aspects are studied in this paper,and the specific content of the study is as follows.(1)By way of analyzing the failure mechanism of different hidden danger types of slope,the geoelectricity model of different hidden danger types of slope is generalized,and the resistivity forward and inverse numerical simulation of different hidden danger type geoelectric model is carried out.The results show that the effect of inversion numerical simulation on resistivity response of hidden body is better than that of forward numerical simulation.At the same time,the resistivity response characteristics of different hidden danger types are obtained by numerical simulation.(2)The indoor saturated experiment has indicated the response characteristics of resistivity in the saturated process of soil-rock mixture,and the correlation between resistivity and saturation was proved by model curve fitting and SPSS software analysis.Through the push-shear model test under different conditions,the response law of resistivity in the push-shear process of multi-phase soil-rock composite medium is obtained,and the critical value of the resistivity change rate when the soil-rock mixture is unstable is determined.By means of SPSS software,it is proved that the change rate of resistivity of soil-rock composite medium increases with the decrease of soil-rock ratio in the process of push-shear.(3)The slope stability early warning system on account of image contrast algorithm is established based on the forward inversion image of resistivity and the instability thresholds of different soil-rock ratios determined by experimental studies.(4)The relevant research results are applied to the slope engineering stabilitymonitoring of Taidong Expressway K94+500-K94+800,and the inferred results are consistent with the actual slope stability state.The feasibility and effectiveness of slope stability monitoring and early warning based on high density resistivity method are verified from the view of engineering application.