In the history of human construction, the sea-crossing bridge is undoubtedly the pinnacle of engineering technology. They not only connect the separated lands, but also symbolize the deep understanding and mastery of the natural world. Today, we will explore the mystery of the construction of the nautical bridge pier and the wisdom of the designers behind it.
Cofferdam method: the wisdom of turning sea into land
In shallow water, engineers used the cofferdam method to construct the piers. They will build a cofferdam around the construction area to isolate the seawater. The water inside the cofferdam is then drained to turn it into dry land. On this "new land", engineers can excavate, drive piles and pour bridge piers as if they were on land. This method is intuitive and effective, but as the water depth increases, the amount of work required for the cofferdam method increases dramatically, so it is more suitable for shallow water areas.
Caisson method: Dinghaishen needle in the deep sea
The caisson method is a traditional method in which a caisson structure with a top and no bottom is placed on the seabed and then excavated inside the caisson to gradually sink to a predetermined depth. This method does not require high mechanization and does not affect navigation. However, the personnel working in the caisson need to operate in a high-pressure environment, which is extremely taxing on the body.
Piling ship: Pier builder in deep water
In deep waters, engineers use piling vessels due to the complex sea conditions. This type of boat can drive piles directly from the surface of the water into the soil layer of the seabed. Depending on the rock formation on the seabed, engineers choose different types of piles to ensure the stability of the piers.
Behind these methods are engineers' in-depth study of the marine environment and a precise grasp of the properties of materials. They should not only consider the bearing capacity of the bridge piers, but also consider many factors such as anti-corrosion and anti-collision to ensure the safety and longevity of the bridge. Whenever we drive on the bridge, we owe a debt of gratitude to the unsung designers and builders who have built these magnificent bridges that connect the world. It is this kind of innovation and persistence that makes us full of infinite imagination and expectation for the future. Let's look forward to how more "sea dragons" will be born under the wisdom of humans.