Whenever heavy rains occur in summer and autumn, the low-lying flyover area has become a key location for flood control in Jinan. From 10 a.m. to 10 p.m. on July 5, among the 141 observation points in Jinan, 25 stations had a cumulative rainfall of more than 100mm in 12 hours, 22 stations exceeded 50mm, and 140 stations exceeded 30mm. The water level of the Xiweizi Trench River surged and overflowed in a short period of time, and the deepest water accumulation of the three-hole bridge, the lowest-lying railway culvert nearby, was about 1 meter.
After more than 3 hours of traffic control, the three-hole bridge, which was originally heavily waterlogged, has resumed normal traffic. The reporter found at the scene that the water under the bridge, which was originally caused by heavy rain, had disappeared at this moment. Where does the stagnant water go? On July 6, Ke Mi Jiqing, the manager of the pumping station of the Tianqiao District Water Affairs Bureau, explained the magic "magic" of cleaning up stagnant water to the reporter of the New Yellow River.
At 3 p.m. on July 5, a rainstorm arrived as scheduled. Over the next few hours, the water accumulation in the Sankongqiao railway culvert in the flyover area gradually increased.
"The rain on the afternoon of July 5 is the heaviest rain since entering the 2024 flood season, and it is also the first test for us in the flood season." Mi Jiqing told reporters that when the torrential rain poured down, the staff quickly turned on the full-power pumping pumps, and the five roaring pumps immediately operated at the same time. During the rain inspection, Han Zhaopeng found that there was a large amount of "passenger water" on the south side of the bridge cave, rushing down along Sankongqiao Street. "It should be that the water level of the Xiweizi trench under the Shunhe viaduct has skyrocketed, causing the water to overflow, and the deepest water under the three-hole bridge is about 1 meter."
The New Yellow River reporter learned that it began to rain in Jinan on the afternoon of July 5. At 14:30, the Jinan Meteorological Observatory issued a yellow warning signal for heavy rain, and at 17:45, the yellow warning signal for heavy rain was upgraded to an orange warning signal for heavy rain.
According to statistics, from 10 a.m. to 22 a.m. on the 5th, among the 141 observation points in Jinan, 25 stations had a cumulative rainfall of more than 100mm in 12 hours, 122 stations exceeded 50mm, and 140 stations exceeded 30mm, of which the precipitation at the Chayekou Town + Chayekou station was the highest, reaching 161.4mm.
Sam Kong Kiu Street has been subject to temporary traffic control after the formation of water accumulation. Under the command of Mi Jiqing, the Beitan Water Pumping Station continued to operate in an orderly and efficient manner, and the water in the culvert was completely emptied in a short time, and the traffic resumed normal traffic.
Zhang Hong, a flood control officer at Beitan Pumping Station, has been engaged in flood control work for more than 10 years. Whenever the flood season comes, Zhang Hong will stick to the Beitan Pumping Station.
In a small computer room, even if all the windows are opened and ventilation is maintained, the temperature of the equipment room will still reach more than 50°C after all the equipment is running.
"If the pump is running at high intensity for a long time, it is easy to overheat or short circuit. We need to adjust the usage of each pump in an orderly manner, so as to ensure that the stagnant water can be discharged as quickly as possible. On the day of the heavy rainfall, Zhang Hong guarded the high temperature computer room for more than 2 hours, "It doesn't matter if we have hot spots, but we can't let the equipment have a little problem." ”
The maximum displacement of 10 railway overpass pumping stations in the flyover area is 41,330 cubic meters per hourThe topography of Jinan City is high in the south and low in the north, and the rainfall is concentrated throughout the year. The overpass area is located at the north end of Jinan urban area, and the railway passes through the city, there are many culverts, and the phenomenon of water accumulation and waterlogging occurs from time to time. In recent years, Tianqiao District has invested more than 1.4 million yuan in the renovation and upgrading of pumping stations. Three years ago, Tianqiao District completed the replacement of supporting equipment and facilities such as the pump unit of the Beitan Pumping Station, the effluent pipe network and the sewage pump of the Chenjialou Pumping Station. At present, there are 10 railway overpass pumping stations in the flyover jurisdiction, with a total maximum displacement of 41,330 cubic meters per hour.
"There are a total of 5 pumps in the machine room of the Beitan Pumping Station, 3 of which are high-power." Mi Jiqing introduced that there is a rainwater well under the culvert road, and whenever the water in the well is 20 centimeters away from the grate, the water pump will be automatically started. Through the underground pipe network, rainwater is sucked into the pumping station by powerful pumps, and then pumped to the production canal, where it flows into the Donggong River and finally into the Xiaoqing River.
Not far from the Beitan Pumping Station, the Chenjialou Pumping Station also has 5 pumps, and the Chenjialou Pumping Station is mainly responsible for the drainage of the railway culvert on Yihe North Street. "For more than ten years, there has never been water accumulation in the culvert of Yihe North Street." According to Han Zhaopeng, the drainage capacity of Chenjialou Pumping Station and Beitan Pumping Station exceeds 5,300 cubic meters per hour, which plays a very important role in emergency drainage and waterlogging removal during the flood season.
The pumping station management department has formulated a detailed annual plan in the daily maintenance and maintenance, regularly inspected the equipment to ensure that the machine room is clean, keeps the equipment open and closed normally, and ensures that the unit is 100% intact. "We insist on working maintenance, carry out all-round survey and drainage of the pumping stations under our jurisdiction in a timely manner, and take targeted maintenance measures to consolidate and improve the drainage capacity of the pumping stations, so as to ensure the safe operation of the pumping stations in the flood season." Mi Jiqing, head of the pumping station management section of the Tianqiao District Water Affairs Bureau, introduced.
Reporter: Chen Yuanhao Editor: Wang Qian Proofreader: Li Li