TGP design and construction progress and its prospect;

Technical control of the excavation of spillway for the Gongboxia Hydropower Station;

The various measures,such as pre-casting through advanced installed pipe shed,grille steel frame or profiled bar support,top arch net, system rockbolt,and injecting concrete,were used to deal with the technical difficulties under bad geological conditions during excavation of tunnel within V type surrounding rocks.

The excavation of left bank abutment of the Hongjiadu hydroelectric project was the highest cut slope in the hydropower construction project then.

By introducing the excavation construction of tunnels type ancho r hole in the Second Changjiang Rivers in Chongqing Wanzhou, brief summary and the ana lysis to construction technology of tunnels type anchor hole for rope bridge wer e presented.

The paper presents the features and difficulties in excavation and support of the surge shaft of Lijie hydropower station on the Bailongjiang river,and describes various technical measures taken in excavation construction as well.

The article illustrates the way to well construct urban drainage pipeline from the requirements and methods of trench excavation,groove construction in pipeline construction,selection of drainage pipeline foundations and project quality and safety control,which has significance to increase composite service ability of the pipeline and purify urban environment.

The excavation process of surrounding rock mass of the tailrace tumels was simulated.