The river closure design of Jinhe Hydropower Station is described, comprising;(1) arrangement of construction;(2) material sources for river closure; (3) river closure design;(4) river closure construction;(5) river closure measures; etc.

The paper presents a review on river closure design of the outer river,the inner river and the mid river during the first,the second and the third phase construction of the Complex respectively.

Practical calculation method for cross-section design of circular steel tube members under axially compressive force;

According to the stress characteristics and failure mode, the method to determine the axial stress and shear stress distribution was presented, and a cross section design method in accordance with current codes was also given.

The paper inquires into main problems in section design of unbonded prestressed concrete plate,and gives out corresponding designing suggestion.

In the design process students exist some problems on live load reduction,the role of the earthquake cycle,the natural setting,the representative value of the gravity load calculation load and load effect calculation and the effect of section design concepts.

Combined with construction example the calculation method is introduced for steam drum hoisting in steam-power plant and discussed from cross section design of hanging beam, hoisting technology and other aspects.

To overcome the short coming in structural design by use of diagrams tables in civil engineering, on the basis of theoretical calculation of the cross section of steel reinforced concrete columns, an artificial neural network model for cross section design of steel reinforced concrete columns is developed considering the main factors.

Four methods with different Intercepting Facilities are proposed and the influence of these methods on city inland rivers and sewage system is analyzed.