The newspaper reported on April 23 that the pump started to pump water at 3:00 pm on the 22nd, and after 24 hours of uninterrupted pumping at 2:00 pm on the 23rd, the pumping work of the section from Heihuquan to Wulianquan in the south moat came to an end. At the same time as the water was pumped, high-pressure water guns also appeared one after another, and the construction workers began to use them to wash away the silt in the river. From the west of Wulian Spring to the Nanmen Bridge, self-flow drainage is adopted, and the earth dam is opened to discharge the river water to the west using the direction of the river flow. conditions of.

24 hours of uninterrupted pumping

At noon on the 23rd, under the shade of the trees beside the Pipa Bridge on the moat, Master Wu (pseudonym) of the mud team of the construction team was resting. He told reporters that due to the large amount of spring water, the originally planned completion time of pumping was delayed a bit, "Now on the river There are not enough mud pumps, so we have sent people to add more pumps, so that there will be 10 mud pumps on the river to pump water at the same time.” He said that the three generators and nearly 10 mud pumps have been running for 24 hours, and on the afternoon of the 23rd The water level of the river has dropped a lot. When the dam was built on the 22nd, the river water often did not cross the top of the dam. On the 23rd, the water level inside the dam was significantly lower than that outside the dam, forming a drop of nearly half a meter.

Near Heihu Spring, five rubber pipes are draining water to the outside of the dam at the same time, and one pipe extends to the river channel east of Jiefang Pavilion for drainage, and there is also a dam in the river channel to the east of Jiefang Pavilion. Along the river to the west, there is a mud pump every other section on the small area of ​​water left on the river, while the north bank has been closed, and several pipes of different thicknesses are draining the water with all their strength. "There are 8 thick pipes for draining water, and 15 thin pipes for supplying water to the high-pressure water gun. This is the first time I have seen it." Master Wu, who has been engaged in mud cleaning for many years, was also "surprised" this time.

Silt test "mud suction" technique

Going to the west side of Wulian Spring, the earth dam that was still submerged by water on the 22nd has now played a role in blocking water. From here to the east to Heihu Spring, the drainage is pumped by mud pumps, while Wulian Spring goes west to south. Under the gate bridge, self-flow drainage is adopted according to the trend. "The (drainage) effect is not bad, and it can also reach the conditions of water gun scouring." The master of the mud team introduced the situation and arranged the generator cables. A master of the mud team said that the silt in the river is at least half a meter thick, and the depth can reach nearly one meter.

At 2:00 pm on the 23rd, when the reporter returned to the vicinity of Heihu Spring from Nanmen Bridge, two high-pressure water guns had already started to work. "The technology of pumping mud by pump is the most advanced method of dredging the river. This time the south moat dredging is the first application of this technology in Jinan. If the effect is good, it will be promoted in other river sections." A worker in the mud team told reporter.

From 2:00 p.m., two high-pressure water guns washed the silt on both sides of the river in the section from Heihu Spring to Pipa Bridge. The scour distance was about 20 meters in an hour. It can be seen that the river siltation is relatively serious. Master Lu of the mud team told reporters that the extracted mud will be transported to Huanghebei by vehicles for disposal, "It was originally planned to be completed before May 1st, but if it cannot be completed on time, the equipment personnel will be temporarily evacuated during May 1st to avoid affecting tourists and the landscape. Go on," he said. The out-of-service cruise ships have also moved out of the boat station. The southern moat, which used to be bustling with tourists, is now more replaced by the roar of machines, and the novel construction method has attracted the attention of many citizens and tourists.