Rock slope stability evaluation method

Abstract

The invention discloses a rock slope stability evaluation method. The method comprises the following steps: S01, drawing a base circle; S02, drawing a slope stereographic projection arc in the base circle; S03, drawing stability level partitions in the base circle; S04, drawing stereographic projection arcs of all structural surfaces in the base circle; S05, finding out intersection points of every two intersected stereographic projection arcs of all the structural surfaces and midpoints of the stereographic projection arcs of the structural surfaces; S06, checking the stability level subarea in the base circle where the intersection points of every two intersecting stereographic projection arcs of all the structural surfaces are located, checking the stability level subarea in the base circle where the midpoints of the stereographic projection arcs of all the structural surfaces are located, and finding out the structural surface or the cutting body most unfavorable for the slope stability, and determining the stability level of the slope according to the stability level subarea. The problems that in the prior art, when stability analysis is carried out on a rock slope, the evaluation result is not objective, and the evaluation process is complex are solved.

Description

technical field [0001] The invention relates to a rock slope stability evaluation method, which belongs to the technical field of slope stability evaluation. Background technique [0002] Slope stability evaluation is an important decision-making basis for slope design, slope stability judgment, slope reinforcement and treatment, and prevention of geological disasters. In the prior art, the stereographic projection method is usually used to evaluate the stability of rock slopes. [0003] The traditional stereographic projection method is to combine structural surfaces in pairs for stereographic projection analysis, measure and find out the structural surface or delivery line that has the greatest impact on slope stability, and then draw the conclusion of slope stability evaluation. For example figure 1 The figure shows that the traditional stereographic projection method is used to analyze the evaluation process of the No. 1 slope stability of the four groups of structural...

AI Technical Summary

Problems solved by technology

The disadvantage of this grading method is that it does not take into account the important factors affecting the stability of the slope, such as the structure plane and the inclination angle of the delivery line.

Therefore, the traditional stereographic projection method has the problem that the results are not objective when evaluating the stability of rock slopes.

[0006] 2) When the traditional stereographic projection analysis method has multiple structural planes, the analysis process is complicated, and the analysis results are not intuitive, and manual secondary analysis is required to obtain the evaluation conclusion of slope stability

In nature, due to the different degrees of geological structure movement, the number of structural planes in the same slope is uncertain, often more than two groups. method, it is necessary to combine five groups of structural surfaces in pairs for projection analysis, according to the combination formula Calculation, there will be 12 combinations, that is to say, there will be 12 analysis diagrams and 12 analysis results, and then engineers and technicians need to find the most unfavorable analysis results for slope stability from these 12 analysis results in order to analyze the slope. Slope stability is evaluated, and the evaluation process is complicated

[0007] To sum up, the existing technology has the problems of unobjective evaluation results and complicated evaluation process when analyzing the stability of rock slopes

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