On May 2015, BAUER Spezialtiefbau GmbH completed successfully the Permeation Grouting works at the Punatsangchhu River for the Punatsangchhu Hydropower Project-2 (PHEP-2). It is already Bauer’s third project accomplished in the Kingdom of Bhutan. The purpose of the works was the installation of a seepage cut-off at the upstream cofferdam for a safe construction of the main dam. Despite the very difficult subsurface conditions including extensive boulders drilling and the extremely difficult working conditions in a remote location as Bhutan, the cut-off wall works were completed in a successful way. Approximately 35,000 linear meters have been drilled and grouted since the award in 2014.
The works were executed by utilizing 2 nos. of drilling units Klemm KR 806-2DB and 12 nos. of Obermann Grout Pumps over a construction period of 12 months.