We systematically discuss the structural characteristics and applicability of the bidirectional π-shape slab commonly used in piled wharf structure in Latin America region，carry out the finite element analysis of the structural forces during the construction and the service periods，summarize the structural deformation，force distribution characteristics and influence law of different scale parameters，and propose the reinforcement measure for local weak point. The results show that compared with the conventional slab structures，the bidirectional π-shape slab makes the upper structure lighter and more integrated，and the mechanical properties are further improved. The results verify the technical reliability and rationality of the bidirectional π-shape slab.