On the basis of introducing structural analysis of a certain submersible bridge, this paper introduces the main content and method of calculation of this kind of bridge, meanwhile, gives some advise on the structure of submersible bridge.

Tingzikou hydroproject whirl dam on the left bank of the bridge approach road is a super heavy-duty bridge,in order to address the issue of the bridge deck elevation,designed to be an submersible bridge.

Study on friction factor and eddy viscosity of overbank flows;

The relationship between water-depth and discharge of overbank flows is very different form inbank flow.

Based on the SKM method,a set of formlae is established to calculate the velocity profiles and the bed shear stresses of overbank flows.

Based on an analysis of field data, it is expounded that the overbank flood is of strong capacity in sediment deposition on the flood plain and scouring in the main channel under the condition of continuous shrinkage of channels on the lower Yellow River.

With the model test,this paper researches overbank flood sediment concentration and its gradation change rules from Jahe beach to Gao village river section of lower Yellow River.

By large amounts of hydraulic model test,the paper analyzed the flow structure around submerged spur,and determined its computation formular of erosion depth for reference.