We are receiving reports from the construction sites of three submergible bridges in Laos. This time, we would like to report on the construction of the Pak Xeng bridge in timeline.
(Additional note) Pak Xeng Bridge is only 18 meters long and was completed before the rainy season began in earnest , so light vehicles, motorcycles, and other traffic were allowed to cross the bridge during the rainy season. In the past, the river was closed for about three months during the rainy season, but this year the bridge was opened only a few times, and only for a short period of time.
Design drawing
Abutments (A1 and A2) are constructed at both ends of the bridge, piers (P1 and P2) are constructed between them, and bridge girders (SLAB) are constructed on top.
Foundation work
At first, the river water is temporarily dammed. Since the ground is good in the mountainous area, direct (solid) foundations were constructed without driving piles.
After the rebar is assembled, concrete is poured into the formwork and allowed to cure.
Construction of abutments and piers
Next, the U-shaped abutments at both ends are constructed. Rebar is assembled, formwork is created, and concrete is poured.
Then, while adjusting the flow of the river with shovels, the two inner piers will also be constructed.
Construction of bridge girders
Finally, the bridge girders are constructed. Timbers erected between the piers support the upper formwork. The U-shaped abutments at both ends are filled with gravel to join the bridge to the road.
Rebar is assembled and concrete is poured. Curing takes several weeks.
Residents work together to build the bridge. The bridge is almost complete.
