The initial cause was determined to be heavy rain and floods, causing sudden changes in the flow of water, causing the embankment to erode. Currently, the two bridges have been fenced off.
Leaders of the Department of Transport inspect the damage at Lang Den bridge, Tri Phu commune (Chiem Hoa)
According to statistics from the Department of Transport, the damage caused by storm No. 3 and the flood discharge of Tuyen Quang Hydropower Plant from September 8 to 12 caused flooding, damage and severe damage to road traffic infrastructure, many locations had landslides on positive and negative slopes, broken roads, landslides on bridge cones, landslides, erosion of sewers, ditches, curbs and roadsides.
Specifically, there are 235 positive slope locations where soil and rock have washed away and filled up sewers, ditches, and road surfaces with an estimated volume of about 107,000 m3. The negative slope landslide has an estimated volume of about 378m3. The damaged road surface has been pushed up and down, with a subsidence and cracking of 1,360m2; the positive slope steel cage has been pushed up and down by 60m; erosion and damage to construction ditches and reinforced curbs has an estimated volume of about 613m3; 44 locations have been flooded and flooded; landslides have occurred at the four cones of Vac bridge on National Highway 37 and Dong 3 bridge on National Highway 2C; garbage, drifting trees... are stuck in bridge piers (Nong Tien bridge, Tuyen Quang city, 3 piers, Son Duong bridge, Son Duong town, Son Duong district). The total cost of damage and damage recovery is estimated at about 80.477 billion VND.
271 landslide and traffic jam locations in districts and cities are estimated to cause damage of about 40 billion VND. Currently, the Department of Transport and localities are focusing on overcoming the situation and ensuring travel conditions for people.
Source: https://baotuyenquang.com.vn/kiem-tra-2-cay-cau-co-duong-dan-bi-lu-cuon-troi-o-chiem-hoa-198301.html
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