Скачать или смотреть The collapse of the railway culvert stairs

The core of this incident is that continuous rainfall triggered geological instability, which led to the damage and collapse of the load-bearing structure of the railway culvert stairs; the evacuation of rescuers is a necessary emergency measure to avoid secondary risks.

From a professional perspective, it can be broken down into three key aspects:

1. Cause Aspect: Continuous rainfall saturates the soil with water, increases pore water pressure, and causes a sharp drop in the shear strength of the soil. This is the direct geological cause of ground collapse and structural instability.
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2. Structural Aspect: As an auxiliary structure, the railway culvert stairs may have problems such as insufficient foundation depth, material aging, or inadequate daily maintenance, leading to its first collapse when the geological conditions change abruptly.
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3. Emergency Aspect: The rapid evacuation of rescuers conforms to the emergency principle of "Prioritizing personnel safety before handling the incident", which can effectively avoid secondary casualties such as falls and burial caused by the collapse. However, subsequent comprehensive structural inspections of surrounding railway facilities are required to prevent wider-range risks.