The large-scale project spanning 10 kilometers spanning Dongfeng Road, the most important east-west trunk road in the core urban area of Guangzhou, has been carried out "quietly" for more than half a year. In order to cooperate with the construction of Metro Line 13, the underground water pipe of Dongfeng Road was completely replaced, and the construction was carried out at 10 o'clock every night, and the backfill was completed at 6 o'clock in the morning to resurfacle the road to the people, avoiding the peak of road use.
On the evening of October 2, the construction site of the underground water pipe on Dongfeng Road in Guangzhou.
The new 17-kilometer main pipe, involving 500,000 households
In order to cooperate with the construction of Guangzhou Metro Line 13, Guangzhou Water Supply Co., Ltd. explored the dense area of underground pipelines, transformed the water pipe network that has been used for many years and is facing aging, and solved possible safety hazards in advance. The project began construction in March this year, from the west field of Dongfeng West Road in the west to the Zhongshan interchange in the east, and the water supply range involves about 500,000 users in the central urban areas such as Liwan, Yuexiu and Tianhe.
According to the Guangzhou Water Supply Company, the project is about 17.0 kilometers near the entire line and will be completed by the end of December 2021 at the latest. After the completion of the project transformation, a pipe network layout of 1 dmn1800 and 1 dn1600 pipeline in the western section and 2 dn1200 pipelines in the eastern section will be formed along Dongfeng Road to further ensure urban water supply and road safety.
Workers at the Guangzhou Water Company weld steel pipes.
Construction for 8 hours in the middle of the night, dust-proof and do not disturb the people
Dongfeng Road, as the main road in Guangzhou, has a huge traffic flow during the day. In order to minimize the impact of construction on traffic, the water pipe renovation project of Guangzhou Water Supply Company was arranged to be carried out during the low peak traffic period from 22:00 to 6:00 the next day.
In terms of dust prevention and noise reduction, the construction uses low-noise construction tools for operation, and the time of breaking the road surface is arranged from 22:00 to 23:30, and the spraying water is strengthened during the operation, and the dust and noise reduction are prevented at the greatest extent. At the same time, Guangzhou Water Supply Company grasped the operation status of the pipeline during the construction period, and set up 3 emergency repair preparation points along Dongfeng Road to deal with emergencies and ensure the normal use of water by the public.
Workers at the Guangzhou Water Supply Company are working at night.
On the evening of November 2, Nandu and n video reporters saw in the construction section of dongfeng middle road from the people's congress to the auspicious intersection: starting at 10 p.m., the construction personnel began to partially close the two lanes from the west to the east to the inside, about 80 meters, prepared for 20 minutes, hooked the machine to excavate the road surface, and opened the atomization spray equipment. After welding the 1.2 m (dn1200) diameter cast steel water pipe on the ground, the hoisting installation began at about 1 a.m. At about 4:30 a.m., the 12-meter pipeline was installed and backfilled, and at 5:50 a.m., the re-paved asphalt was basically dry, the construction vehicles began to withdraw, and at 5:58 a.m., the road closure facilities were completely evacuated.
A total of 8 sections of construction sites were synchronized that night, and Dongfeng Road was re-healed at 6:00 a.m. in the morning, and the road was returned to Yumin 1 hour before the morning peak.
As of press time, 82.4% of the installation of the main pipeline has been completed, the overall progress of the interval section is 46.6%, the overall progress of the station section is 74.78%, and the overall project will be completed by December 31, 2021 as planned.
Text: Nandu reporter Ren Leibin
Photo: Nandu reporter Li Zhanjun Chen Jiehao