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CrossFit415
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How did engineers manage to build tunnels submerged 100 ft under water without having tunnels collapsing? Say for example, BART, has trains going through these tunnels daily. How did engineers build water tunnels?
CrossFit415 said:I see thanks. Oh BART stands for Bay Area Rapid Transportation located here in Bay Area, California
The purpose of building submerged tunnels for BART (Bay Area Rapid Transit) is to provide a safe and efficient mode of transportation for commuters in the San Francisco Bay Area. These tunnels allow trains to travel underwater, avoiding traffic and reducing travel time between cities.
The tunnels are constructed using a technique called immersed tube method, where large pre-made concrete segments are transported by barge and lowered into a trench dug on the sea floor. The segments are then connected together to form a tunnel.
Some of the challenges of engineering submerged tunnels include managing the water pressure and buoyancy forces, ensuring water-tightness, and mitigating risks associated with construction in a marine environment. Additionally, the location and geology of the sea floor must be carefully considered to ensure stability and durability of the tunnels.
Safety is a top priority during the construction of submerged tunnels. Specialized equipment and techniques are used to ensure the safety of workers, such as pressurized chambers for working underwater. The tunnels are also designed to withstand extreme weather conditions and potential seismic events.
Submerged tunnels offer numerous benefits for BART, including reducing travel time, improving transportation efficiency, and reducing congestion and air pollution. They also provide a more reliable and weather-resistant mode of transportation compared to surface-level options.