Methods for Groundwater Lowering and Construction of Drainage System under Buildings in Ulaanbaatar City

摘要

The territory of Ulaanbaatar city belongs to the Khentii mountain range, and located in the Valley of Tuul River that stretches out from east to west merging with small rivers like Selbe, Ulyastai and Tolgoit. Our investigation shows that the groundwater has undesirable effects on buildings. This paper describes the detailed hydrogeological study of Ulaanbaatar city to ensure the stability of construction foundations. Furthermore, it presents methodologies for lowering groundwater and designing drainage system depending on hydrogeological condition. Finally the paper reports the results of implementation of these methodologies in engineering construction projects.