The invention discloses a
steel bar surface type connecting joint adopting a nodular
cast iron member. The
steel bar surface type connecting joint comprises a shield segment and a
subway station wall column, the shield segment and the
subway station wall column are connected through the nodular
cast iron member, a tooth groove shear-resistant member and a non-bonding section prestressed
steel bar, and the nodular
cast iron member comprises a belly part, an
upper wing and a
lower wing. The belly part is connected with the tooth groove shear-resistant member, a longitudinal tensile steel bar is arranged in the shield segment, the non-bonding section prestressed steel bar is arranged in the
subway station wall column, and the longitudinal tensile steel bar and the non-bonding section prestressed steel bar are connected through a longitudinal steel bar connecting sleeve. The steel bar
surface type connecting joint has high connection strength and energy dissipation performance, is suitable for complex underground
engineering construction, can bear large
bending moment and shearing force at the same time, and is good in anti-seismic performance; and the duct piece section embedded nodular cast iron member is adopted, so that an embedded member is coordinated with concrete deformation, concentrated stress of longitudinal connecting steel bars is avoided, the integrity of the longitudinal connecting steel bars is enhanced, and a surface type connecting mode of the steel bars is formed.