Research Article
Prediction Model of Collapse Risk Based on Information Entropy and Distance Discriminant Analysis Method
Table 1
Evaluation factors and grading standard of highway collapse risk.
| | Evaluation system | Evaluation index | Number | Unit | Evaluation grades | | | | |
| | Topography | Slope shape of slope | | | Fold line slope () | Concave slope () | Straight slope () | Convex slope () | | Aspect of slope | | | Sunny slope (4-3) | Shady side (2-1) | | Slope of slope | | ° | >60 | 40–60 | 20–40 | <20 | | Height of slope | | m | >150 | 100–150 | 50–100 | <50 |
| | Geologic structure | Mesostructure | | | Development () | More development () | Less development () | No Development () | | Exposed structural face | | | Development () | More development () | Less development () | No Development () |
| | Stratum | Stratum lithology | | | Loose rock () | Cemented Chasten () | Well cemented half hard () | Hard rock () | | Weakness interlayer | | | Clear () | More clear () | Less clear () | Not clear () | | Relationship between weakness face and free face | | | Consequent slope () | Oblique crossing () | Cross slope () | Reverse slope () |
| | Climatic and hydrological geological condition | Mean annual rainfall | | mm/year | >1500 | 1000–1500 | 500–1000 | <500 | | Rainfall erosion | | m | >0.5 | 0.3–0.5 | 0.1–0.3 | <0.1 |
| | Other factors | Vegetation cover rate | | % | <5 | 5–15 | 15–30 | >30 | | Weathering degree of rock | | % | >30 | 10–30 | 5–10 | <5 | | Earthquake intensity | | ° | >8 | 5–8 | 3–5 | <3 | | Human activity intensity | | | Big () | Bigger () | Smaller () | Small () |
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