Early-warning evacuation staircase for flood flowing back to underground space and using method thereof

Abstract

The invention provides an early-warning evacuation stairway for flood flowing back to an underground space and a using method of the early-warning evacuation stairway. The early-warning evacuation stairway comprises a stairway body and a separating wall arranged in the middle of the stairway body, and the separating wall divides the stairway body into an early-warning subarea and an evacuation subarea; the early warning subarea comprises a first overground ladder, an early warning platform and a first underground ladder which are connected in sequence, the evacuation subarea comprises a second overground ladder, an evacuation platform and a second underground ladder which are connected in sequence, the early warning platform and the evacuation platform are located on the two sides of the isolation wall, and the height of the early warning platform is smaller than that of the evacuation platform. According to the stair structure, transformation is conveniently conducted on the basis of a traditional stair, no flood enters the underground space during medium-low-intensity rainfall and timely and safe evacuation of personnel during high-intensity rainfall can be achieved only by additionally arranging the separating wall, the early warning platform and the evacuation platform, the reliability is high, and the safety is high. The method can be widely applied to design and transformation of personnel waterlogging prevention evacuation channels in underground spaces such as subways, underground shopping malls and underground parking lots.

Description

technical field [0001] The invention relates to the field of design of entrances and exits of underground spaces in municipal engineering, in particular to an early warning and evacuation staircase for flood backflowing underground spaces and a method for using the same. Background technique [0002] With the development of urbanization and the continuous expansion of the city scale, the application of underground spaces such as subways, underground shopping malls, and underground parking lots is becoming more and more extensive. Under the influence of climate change and urban heat island effect, extreme rainfall occurs frequently in cities. Since the drainage capacity of the urban drainage system is mostly designed for low-intensity rainfall in cities, urban waterlogging is more likely to occur under high-intensity rainfall, and the surface water is too deep and pours back into the underground space, causing casualties and property losses. During high-intensity rainfall, t...

AI Technical Summary

Problems solved by technology

Another way of thinking is to add a water-retaining platform of the same height on the surface of the stairs. However, if the height of the water-retaining platform is low, the flood may still flow back into the underground space, and when the backflow is inflow from the entire section of the stairs, there is no safe evacuation channel. If the water retaining platform is too high, when the personnel evacuate to the surface, the surface water depth may exceed the safe wading depth of personnel, and there is a greater risk of wading

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