This is the rock-socketed pile construction project of the Puqian Sea-crossing Bridge in Hainan Haikou undertaken by our company in November 2015. The project has 36 piers with a diameter of 1800mm and a length of 65m~89m (special pile length 110m), including 288 rock-socketed piles. The place less than 200m away from the construction area is the famous ";Hainan Mangrove" protection area, which is also a great test for the construction technology of mud wall protection. Our company has withstood the test.