Xiamen University water pump four "soft ribs" secret

It is understood that on July 19, heavy rains caused flooding in "Heron Island" in Xiamen. After a heavy rain in the night, parts of Xiamen became a vast ocean, and the famous Xiamen University was not spared this time. “The most beautiful campus in the country” has become “the most water university in the country” at one time. Netizen Qi Hu: To Xiamen University to see the sea. With the heavy rain brought by “5.16” and “Su Li,” Xiamen University can all pass through the area safely. This time it was unfortunately flooded. In addition to the “natural disasters” of more than 200 millimeters of rainfall, are there any other hidden dangers?

Typhoon transforms Xiamen University into floating Venice

To this end, the Asian fluid network reporter visited the survey found that when the "Simallon" rain poured, the pump that was originally placed on the campus of Xiamen University had been desperately failed to drain out of the flood drain. This undoubtedly exacerbated the infighting of the campus of Xiamen University.

In fact, it is not just the key moments for the pumping on the campus of Xiamen University. It's not just a time-consuming process. The low-lying sections in Xiamen Island and the tunnels underneath are all heavy pumping pumps. There are still four “soft ribs”.

Soft ribs: "ageing" serious

It is understood that these pumping pumps have a common problem. Due to insufficient process design, many heavy rains have far exceeded their pumping capacity. The consequences of overloading are that the pumping water is aging, “tired”, and “excessive overdraft”. Problems occur frequently when used.

For this reason, the staff regularly repairs and maintains these pumping pumps. Once they are not overhauled before the onset of heavy rain, the original weaker drainage capacity will be reduced by one percent, and even pumping will be impossible.

Soft rib 2: The appetite is too small

"The previously built lower-passage passages were mostly set to meet the low standard of a one-time torrential rain in five years, and the drainage capacity was not strong." A person who dredged through the passageway told the reporter that due to the low drainage standard, the corresponding pumping The number of pumps is small, and the power of a single pump is also low, mostly less than 15 kilowatts. In this regard, compared with the newly built Xiaozhong Road and Shugang Road underpass passages, the two new passages set up four pumping pumps, each with a pumping power of 30, due to the high standard of 20 years. Above kW, 400 tons per hour can be drained. Just like this, in the past few storms, the two passages were spared.

Soft rib three: artificial pump "do not fly"

It is understood that in many cities in Xiamen, low-entrance pumping is the practice of using automatic pumps and artificial pumps.

However, the artificial pump has a defect, that is, in the case of lack of maintenance, once it encounters an extremely heavy rain, the human cannot operate automatically without being able to operate. For this reason, industry professionals suggest that investment in infrastructure should be increased to increase the number of automatic pumps.

Weakness four: often "power off"

These pumping stations have another fatal injury - the power distribution room is set inside the channel, so that when the storm comes, the accumulated water will reach a certain height and will infiltrate, causing the power room to be flooded and unable to provide power for the pump in the channel. So that the channel completely loses its drainage capacity. A survey by the reporter found that most of the city’s large and small underpass passages and power distribution rooms are mostly located on the inside of the tunnel, and frequent flooding and power cuts occur during heavy rains. Take the tunnel under the Convention and Exhibition Center as an example. At the time of the "5.16" heavy rain, its power distribution room was soon submerged.