The sinking method is a critical construction technique used for installing deep foundations such as wells, caissons, and bridge piers, especially in soft or waterlogged soils.
This method involves constructing a well curb and shaft at ground level, then excavating the soil inside the structure to allow it to gradually sink under its own weight. With careful monitoring, adjustments are made to keep the caisson perfectly vertical as it descends to the required depth.
Once the foundation reaches the target stratum, the base is sealed with concrete through bottom plugging, and the shaft is filled to provide stability and strength. The sinking method ensures a durable, high-capacity foundation where conventional piling may be difficult or ineffective. It remains one of the most reliable solutions for bridge works, marine structures, and deep foundation engineering.
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