Split type gravity anchor and construction method

The invention belongs to the technical field of anchoring equipment, and discloses a split type gravity anchor and a construction method, and the split type gravity anchor comprises a caisson, a heavy block and an anchor cable. A plurality of slots are formed in the top end of the caisson at intervals. The heavy blocks and the inserting grooves are arranged in a one-to-one correspondence mode, and the bottom ends of the heavy blocks can be inserted into the inserting grooves. One end of the anchor cable is connected to the caisson. According to the split type gravity anchor, the caisson and the heavy block are arranged, the bottom end of the heavy block can be inserted into the inserting groove in the top end of the caisson, so that when the split type gravity anchor is installed, the caisson and the heavy block can be hoisted respectively, the requirement for the hoisting capacity of hoisting equipment is lowered, the construction cost is reduced, and the heavy block is convenient to install due to the inser