In the scope of Doha Metro Gold Line Project, curtain grouting is planned for reduction of the groundwater inflow during the construction phase . In order to achieve that various numbers of both vertical and inclined (up to 18┬░ from vertical) boreholes are drilled down to 36m depth and grouted bottom up by single packer grouting method at 5m long stages having 10 to 2 bars of descending pressure criteria.