The construction of Can Tho Bridge was launched on September 25th, 2004. Initially, the Can Tho Bridge was expected to inaugurate on December 14th, 2008. However, due to the collapse of Can Tho Bridge on September 26, 2007, the bridge was inaugurated on April 24th, 2010. The total investment was 4,832 billion VND (nearly 342.6 million USD in 2001) with the official development assistance (ODA) loan from the Japanese Government and the counterpart fund from the Vietnamese Government (about 15%).
Can Tho bridge has some common features of the cable-stayed bridge, with some characteristics as follows:
The pile foundation is a bored pile with a diameter of 2.50m with the longest length in Vietnam (94 m) and each pile has 45 tons of steel with reinforced steel of 38 mm diameter and approximately 500 m³ of 30 Mpa concrete. The Northern pier has 30 piles and the Southern pier has 36 piles.
The bored piling machine works on the principle of reverse circulation drilling system using 5% bentonite mixed with polymer. At the Northern pier constructed on the land, a 2.60m diameter steel pipe with the thickness of 22mm and a length of 12m should be used as a temporary casing.
The southern pier footing is constructed underwater with the depth of 20m, so workers have to use a 42m long casing to keep the pier fixed (do not retract the casing after bored piling). After pouring concrete, concrete piles are pumped with a high pressure pump to increase the bearing capacity of pile.
The northern pier footing is built on the ground, so workers just have to make a foundation pit and install a normal concrete casting. As for the southern pier footing, which is constructed under the water, the bottom and the surrounding ring should be pre-casted on the land and assembled on top of the piles into the formwork attached to the pier footing.
The reinforced steel for constructing the pier has the largest diameter of 52 mm and is connected with a threaded connector. Verification test shows that when pulling to damage the reinforced steel, only its body is broken, not the joint. The height of the pier footing from the water surface is 164.80 m and from the deck is 134.70 m. The head is shaped in the inverted Y and the legs are closed to narrow the area of the pier footing, this shape is very beautiful and elegant, unlike the H-shaped. The pier footing is symbolized as praying hands gesture in the Asian spirituality.
https://www.cantho.gov.vn
