How was the bridge built? How is the bridge foundation built and designed? In flooded areas, how do people build the foundation of the bridge – the foundation of all construction? Are you curious to know how people build the bridge foundation, while the water is still flooding around? Try to find out.
A foundation is a building structure located at the bottom of any building, whether a level 4 house or a 100-story building.
This is the foundation of all buildings, as it has the direct function of bearing all loads on the ground. It is no coincidence that our forefathers have a saying ” Make a house from the foundation “. If the foundation is strong, the house will be durable, so it can be considered the most important part of any construction.
For bridges, too, a foundation is required. The bridge foundations are all made of reinforced concrete, which also transmits and distributes the entire load to the ground so that the bridge can stand firmly, despite the fact that there are many vehicles on the bridge.
To build the foundation, experts need to carefully survey the geology. The ground needs to ensure that there is no subsidence before digging pits to drive piles, and test construction must be done to determine the settlement process .
Digging holes, driving piles to build the foundation with the bridge on the mainland is nothing to talk about. But when the bridge crosses the river, even across the sea, how can one build the foundation of the bridge? The answer is right in the picture below.
That’s right – they use a gantry system to prevent water from entering during the excavation. For shallow water areas, the ground inside the girder can be pushed up, from which piers will be built.
For bridges crossing rivers, deep pools… foundations will be closed from the top down. First, engineers had to build a cofferdam – a cofferdam – a system of internal walls with a pump operating continuously to bring water out, to ensure dry working conditions. The foundation will be built inside the dyke.
A typical dike
Drilling rigs can be installed to build piers.
For megastructures through deep waters, they use a more complex system, but in theory still create a dry environment for foundation construction.
After the foundation is successfully placed, concrete will be poured to form the bridge piers . The deck will then be installed on those piers. The process of building a bridge can be briefly described in the following video.
And below will be some famous beautiful bridges and roads in the world.
Millau Viaduct – France
Golden Gate Bridge – USA
Tower Bridge London (England)
Spain’s Puente del Alamillo Bridge
Ghenh Bridge is 223.30m long (along with 125.37m long Rach Cat Bridge) in Bien Hoa city – are two bridges spanning Dong Nai river leading to Cu Lao Pho, dedicated to both road and railway with 2 bridges. The side part is for two-wheelers, the middle is for trains and cars.
There are documents that say that the bridge was built in 1909, and was designed by architect Gustave Eiffel (1832 – 1923, the designer of the Eiffel Tower), along with two other bridge architectures in Vietnam, the Long Bridge. Bien (Hanoi) and Trang Tien Bridge (Hue).