The geological conditions of a high pile wharf project in Hainan are special,with hard rock layers covering the surface and clay layers below.The wharf foundation is adopt cast-in-place piles,with the hard clay layer as the bearing layer.After the construction of the project,static loading tests using self-balanced method and high strain method are carried out to detect the bearing capacity of the pile foundation,and the detection results are compared with the theoretical calculation results by the code.The results show that by using the load-displacement relationship curve of self-balanced test,it can be determined that the pile end is still in the elastic stage.Based on the distribution of the pile axial force along axial direction during the loading process,the values of the lateral friction resistance and end bearing capacity of each pile can be determined separately,and the pile resistance is not fully exerted and the actual ultimate bearing capacity of the pile foundation should be greater than the test value.According to the results of the high strain detection method,lateral friction are greater than the theoretical calculation results,and the pile end bearing capacity is smaller,while the total pile foundation bearing capacity is relatively close to the two,so it can be used as an auxiliary verification for static load pile testing.The use of self-balanced static loading test in port and wharf engineering,using high strain testing method for verification,can solve the problem of detecting the bearing capacity of high-mass pile foundations underwater conditions.