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A Hazard Assessment Method for High Rock Slopes

An evaluation method and risk technology, which is applied in the field of risk evaluation of large complex rock high slopes, can solve problems such as large differences in failure probability

Inactive Publication Date: 2016-06-22
HOHAI UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The safety factor is the same, but the damage probability may be quite different

Method used

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  • A Hazard Assessment Method for High Rock Slopes
  • A Hazard Assessment Method for High Rock Slopes
  • A Hazard Assessment Method for High Rock Slopes

Examples

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Embodiment 1

[0052] Example 1: A rocky high slope is located in an alpine canyon section, with complex structural phenomena, very strong unloading of rock mass, high ground stress level, complex and changeable lithology, and faults, interlayer compression zones, and deep cracks. The slope is mostly between 50° and 90°. The geological conditions are very complicated, and there are deformed and cracked rock masses and toppled deformed rock masses. The stability of the slope is directly related to the safety of the entire project construction period and operation period. The risk assessment is carried out on the slope of the cable platform on the left bank of the important key part.

[0053] There are faults developed in the slope, and the scale is large, and the occurrence is N30~50°E / SE60°~80°. The upper part of the formation lithology is sandy slate, and the lower part is marble. There are a small amount of late intrusion in the rock mass There are lamprophyre veins, and there are greens...

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Abstract

The invention discloses a method for evaluating risks of a high rock slope. The method for evaluating the risks of the high rock slope comprises the following steps: (1) constructing a risk evaluation index system, (2) defining classification levels, (3) carrying out dimensionless processing on indexes, (4) determining comprehensive weight of evaluation indexes, and (5) evaluating risk states of the slope. By means of the method for evaluating the risks of the high rock slope, factors which influence stability of the slope are comprehensively analyzed and identified, a subjective weighting method and an objective weighting method are combined, and the attribute recognition theory and the maximum attribute measure principle are adopted to indentify the risk states of the slope. Compared with other methods in the prior art, the method for evaluating the risks of the high rock slope overcomes the defects that a safety factor method can not express the change degree of the risks of the slope and reflect uncertainty and randomness of the risks of the slope, subjective preference and objective laws are comprehensively measured, evaluation and judgment are more reasonable, and high engineering significance and practical values are possessed.

Description

technical field [0001] The invention relates to a method for evaluating the risk of a slope, in particular to a method for evaluating the risk of large and complex rock high slopes in fields such as water conservancy and hydropower engineering. Background technique [0002] my country has a vast territory, complex and diverse topography, and mountainous areas account for more than 2 / 3 of the country's land area. Although mountainous areas are rich in water energy, mineral deposits and biological resources, they also create the geomorphic basis for large-scale landslides, lurking a lot of dangers and disasters. With the development of hydropower resources in Southwest China, a large number of high and steep rock slopes have been formed. They are generally located in high mountains and canyons, with well-developed seismic fault zones and high tectonic stress levels. The safety problems of high rock slopes are very prominent and serious. It affects and restricts the constructi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F19/00
Inventor 赵博徐卫亚梁桂兰张冬梅陈鸿杰倪海江
Owner HOHAI UNIV
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