Method for measuring geological landslide displacement by using rainfall

Abstract

The invention belongs to the technical field of geological landslide measurement and relates to a method for measuring geological landslide displacement by using rainfall. The method includes five steps: landslide area rainfall and landslide displacement data monitoring, rainfall and landslide displacement monitored data preprocessing, landslide displacement and rainfall correlation analysis calculating, landslide displacement and rainfall hysteresis analysis calculating and evaluating and forecasting. The step of landslide displacement and rainfall correlation analysis calculating specifically includes: (1) building a rainfall main sequence and a landslide displacement subsequence; (2) performing dimensionless normalization processing for the rainfall main sequence and the landslide displacement subsequence; (3) obtaining difference information of a matrix; (4) obtaining the correlation coefficients indicating correlation of the main sequence and the subsequence; and (5) obtaining the average value of all the correlation coefficients, namely the final correlation degree. The method is simple to achieve, reliable in design principle, accurate in calculation and analysis, fast and high in accuracy by performing calculating through a computer, low in cost, good in monitoring and early-warning effects, obvious in benefit and high in monitoring efficiency.

Description

Technical field: [0001] The invention belongs to the technical field of geological landslide measurement, and relates to a quantitative evaluation method for determining the correlation between landslide displacement and rainfall and its hysteresis relationship, in particular to a method for measuring geological landslide displacement using rainfall, which is quantified by measuring rainfall Analyze and evaluate the displacement of geological landslides, and realize the monitoring and early warning of geological landslide displacements. Background technique: [0002] According to incomplete statistics, rainfall-type landslides account for about 70% of the total number of landslides, and 95% of geological landslides occur in the rainy season. A key predisposing factor for stability. Most of the traditional related studies are based on the monitored rainfall and landslide displacement data, and carry out regression fitting analysis on the scatter plots of the two, establish t...

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Problems solved by technology

Most of the traditional related studies are based on the monitored rainfall and landslide displacement data, and carry out regression fitting analysis on the scatter plots of the two, establish the equation of the fitting curve to study the correlation law between the two, and further use mathematical statistics methods to carry out Forecasting and forecasting, the shortcomings of this method are mainly reflected in the following two points: First, when performing fitting analysis, it is necessary to artificially assume the functional relationship in advance, and it is difficult to accurately determine the functional relationship for complex nonlinear correlations, so it is easy to cause measurement errors The second is that the discrete graph is a static correlation that does not include time factors, and cannot reflect and evaluate the dynamic process relationship that includes time factors well; The relationship only stays in the qualitative description of the law summary, and there is no quantitative measurement method in the actual implementation

He Keqiang's paper "A Gray System Analysis of the Differential Slip Law of Xintan Slope" (Journal of Hebei Institute of Geology, 1991) proposed to use the "correlation degree" analysis method to analyze the time and space of the differential slip law of Xintan Slope, but it did not involve rainfall Sequence research and application, not to mention any analysis and evaluation of the relationship between landslide displacement and rainfall sequence

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