Construction of rock-earth dam of the Hoabinh hydraulic development

1. The adopted design and construction schemes for the dam made it possible to place, under complex geologic and hydrologic conditions, the dam fills without trench construction or drainage, which permitted starting sooner the fill placement work and sharply reduced the construction cost. 2. For the dam engineering work, use was made of national and foreign experience in construction of high rock-earth dams -the dam core was constructed using clay-skeleton soil fills; the developed transition zones were made using fills consisting of inexpensive natural soils, which made it possible to eliminate the use of artificial mixes; and zoned placement of soils in the dam shells was carried out. 3. The construction method and sequence made it possible to build the dam under complex climatic conditions within the established period and to use soils from useful excavations almost exclusively.