Method for constructing groundwork for large-scale sinking well in deep water

The present invention relates to a large-size deepwater sunk well foundation construction method. Said method is applicable to deepwater sunk well foundation construction for various applications. Said method includes the following several measures: sunk well steel shell whole body manufacture, whole body sinking, whole body height connection, whole body float-conveyance, heavy anchor positioning, closing bottom portion of steel shell, pouring concrete and deviation correction.