Research results:According to the measured data,the increased range of stiffness of bridge pier is less than 3%.

To counter the insufficiency of numerical analysis for long-span bridge pier top block,study of key factors of the numerical analysis such as unit selection,mesh generation,mesh density,model simplification, prestressed duct effects,and submodel selection scope was carried out.

In the process of the solid parts of hollow pier construction, hole is reserved in the pier wall, solid steel corbels is installed in the hole as vertical support piers for the top construction of cast in place solid pier.