1) The centralized point is arranged, and the ship anchor chain is generally arranged below the column; The advantages of this layout are: the vertical force of the upper structure can be fully used to balance part of the water buoyancy; Because of the centralized arrangement of anchor bolts, it is also convenient for the external waterproof construction under the basement floor; Attention should also be paid to the arrangement of friction chains. The damage is usually the damage of anchoring rock mass; The anchor bolt construction is inconvenient due to the dense local anchor bolts
