The paper discusses the technology requirement,construction programs,methods and quality control measures on construction of jointing old and new concrete in Danjiangkou dam heightening project of Middle Line of the South-to-North Water Transfer Project.

In dam base widening excavation construction of left bank of Danjiangkou dam heightening project, it is essential not to produce crack by blasting in old dam body to ensure dam safety, especially to ensure normal operation plant and other equipments.

Research on Environmental Supervision of Danjiangkou Dam Project in the Middle Route Project of South-to-North Water Transfer;

Study on kerf plan of right bank turning dam section for Danjiangkou Dam Heightening Project;

Study on Heel Stress of the Heightening Project of Danjiangkou Dam;

Rope-saw cutting to restore transverse joints before Danjiangkou dam heightening works;

The comprehensive development planning of Danjiangkou Hydraulic Project,general layout of the first-phase project and the main hydraulic structures are described;the second-phase dam heightening works and the major social-economic benefits of Danjiangkou Hydraulic Project are described emphatically.

Effect of Danjiangkou Water Transfer Project on Shaanxi and regional economy and its countermeasures;