Mysterious transportation section
In the eyes of many shipowners who often travel to and from the Beijing-Hangzhou Canal, there is a "Bermuda Triangle" in the Hangzhou section of the Canal: ships often hit the bottom or run aground here.
There are data to prove that there were 40 accidents in Hangzhou inland river last year, including 27 accidents in this section of the canal.
cause
Yesterday, the municipal transportation, port and shipping department decided to conduct a "comprehensive physical examination" on this 7.8-kilometer-long waterway.
Therefore, from yesterday to June 5438+02, ships are prohibited from entering the investigation waters from 9 am to 5 pm every day. Be careful during menstruation.
This section is regarded as the "Bermuda Triangle" by the shipowner as the urban section of the canal, which is located at the exit of the Sanbao Water Distribution Corridor of the Beijing-Hangzhou Canal to the Qingyuan Bridge of the West Lake Cultural Square, with a total length of 7.8 kilometers. Every time a boat passes by, it is cautious.
According to Zhou Guangming, director of waterway management department of Hangzhou Port and Shipping Bureau, there were 60 accidents in the canal section in 2008, including 40 accidents of grounding and damage of ships and 27 accidents here.
Canal detection
River water body map
In order to fully understand the water depth, current situation and riverbed sediment of Bermuda, the Hangzhou Port and Shipping Department spent more than 250,000 yuan to invite Zhejiang Hehai Surveying and Mapping Institute to adopt the internationally advanced sonar system to comprehensively detect the water depth, current situation and riverbed sediment of the whole section.
According to the frequent accidents in this segment, six areas, including riprap area downstream of the exit of Sanbao Water Distribution Corridor, in front of Pujia Bus Terminal, west of Genshan Railway Bridge, near the exit of Zhongdonghe River, east of West Lake Cultural Square Bridge and south of Qingyuan Bridge, became the focus of investigation.
According to the introduction of the port and shipping department, such a large-scale and professional urban waterway scanning survey is the first time in Hangzhou. Jiang Xiaojun, vice president of Geophysical Exploration Branch of Zhejiang Hehai Institute of Surveying and Mapping, said that after the scanning, the port and shipping department will take necessary engineering measures according to the navigation obstacles, and focus on the investigation and rectification of the main navigation objects.
Yesterday, after testing, it was preliminarily inferred that the frequent accidents in this channel resulted in Bermuda, which was probably due to the siltation of the river in the green belt on both sides of the strait, and the boulders fell into the river, which led to the shallowing of the river. Channel detection is a bit like "B-ultrasound"
At 9: 30 am yesterday, an ordinary boat with peeling paint sailed into the waters of Qingyuan Bridge in Hangzhou section of the Beijing-Hangzhou Canal.
This seemingly insignificant ship is loaded with internationally advanced scanning equipment.
In its hut, there is only enough room for two tables and three computers. Several blue cables, one end of which is on the notebook and the other end of which leads out of the engine room to the underwater, are connected with three detection instruments.
Measuring the canal is a bit like "B-ultrasound": all the data are measured by the multi-beam sounding system at the bow and the side-scan sonar system at the side of the ship with GPS positioning system, so that the high-definition underwater three-dimensional image is directly transmitted back to the computer in the cabin.
In the past, the channel survey mainly relied on the surveyors standing outside the cabin and holding the sounding rod to enter the water for manual operation, which not only consumed a lot of manpower and material resources, but also was slow and difficult to measure accurately.