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To directly inspect the scene, in your opinion, where was the original cause of the North Chu River – South Ma River fault?
The first is the disadvantageous combination of topography and geology. The canal is built on the land of the embankment, the canal bank is 16 m high on the embankment on weathered rock.
This work has been running stably for 7 years, but the weathered rocks here can be a problem. The geologists surveyed them again to see if there was a problem with the eroded rock.
Second, when the discharge water is analyzed to clean the canal environment and supply water for winter-spring cultivation, it is necessary to review the water pressurization operation process.
A section of the canal, about 70 m long, broke |
Does this mean that the water operation process here creates a very strong force that leads to the rupture of a part of the channel?
Water can also be channeled into this section of the canal, which is adjacent to embankments and bridges. The landslide is right at the foot of the aqueduct. You should review the operating procedure for putting water in the gutters to adjust accordingly.
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Why is the Vice Minister of Agriculture and Rural Development lamenting the broken channel of more than 4.3 billion VND? |
Construction quality inspection to clarify responsibilities.
How will the Ministry of Agriculture and Rural Development consider the responsibilities of individuals and units in this incident?
Now define the responsibility, you need to review the cause of the problem. I have gone through everything including drawings, build layout, build process is correct based on layout. The problem is that the standard of this channel should probably be higher than that of the others. Because it is special, which is the junction between the canal and the aqueduct, the standard must be higher.
According to photographs taken of the place, has public opinion said that the thin layer of concrete is related to the quality of the construction?
It is not relevant. Because this collapse was at the bottom of the canal. Through the test, it is an arc that slides into the bottom of the channel, not the channel. This slide is about 5 m from the bottom of the channel, it slides the entire channel. I preliminarily check that the concrete, steel and concrete layers at the bottom of the channel are correct according to the design.
In this incident, does the Ministry of Agriculture and Rural Development request to inspect the concrete sample?
Surely the experience has yet to do. But its cause was not due to the construction but to the landslide at the bottom of the canal. The bank of the canal is 16 m high, but the bottom of the canal is only 3 m and landslide occurs at the bottom. This incident is force majeure. I have instructed the units within 3 days to completely repair themselves and return the works to the normal water supply.
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Canal project north of the Chu River – VND 4.3 billion invested south of the Ma River The channel fault north of the Chu River – south of the Ma River (the section through Minh Lai Village, Phung Minh Commune, Nguyen Lac District, Thanh Hoa Province) occurred around 9:45 a.m. December 27, at location K5 + 170 to K5 +240 (70 m long breakdown section). The incident eroded some 25,000 m3 ground, completely damaged 42 concrete slabs that paved the roof and bottom of the canal. The canal broke, causing the water to flow, sweeping the soil and burying almost 3 hectares of fields (not planted), 0.5 hectares of fish ponds.
Also at the meeting with the Thanh Hoa Provincial People’s Committee and the Irrigation Construction Investment Management Board 3 (a unit under the Ministry of Agriculture and Rural Development; it can manage and operate the canal) on December 29, the Vice Minister Nguyen Hoang Hiep apologized to the leaders. Thanh Hoa province and the people, because the canal failure occurred. Mr. Hiep also said that, with respect to the management and responsibility of the canal operation, the Board of Directors of Investment in Irrigation Construction No 3 reported the incident to the leaders of the Ministry of Agriculture and Rural Development. It is known that the North Chu River Canal Project – South Ma River Canal takes water from Cua Dat Lake (Huong Xuan, Thanh Hoa), with a total length of more than 370 km, total investment of more than 4.3 billion VND. construction in 2011 and just completed and put into operation in early 2019.
Minh hai |
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