National Institute of Rock Mechanics (NIRM) was actively associated with the package-6 of Kaleshwaram lift irrigation project. NIRM deployed one residence engineering Geologist at the project site during Aug 2013 to Dec 2018 for carrying out construction stage engineering geological investigations. NIRM has also played an important role in the conversion of the open pump house and surge pool cavities to underground caverns.
For the design of steel liners deformability modulus of rock mass is one of the prime parameters which is determined by carrying out in-situ investigations. Accordingly, plate load tests were carried out by Geotechnical Engineering division of NIRM to ascertain the in-situ modulus of deformation in the Delivery Main (DM) tunnels of Kaleshwaram project, package-6 in February 2017.
The excavation was completed as per schedule. Seven pumps (124.46 MW each) are installed which will lift 146.24 TMC water for drinking for en-route villages, industrial water and irrigation of 18.25 lakh acre agricultural land for seven districts. The trial run of the pumps is already started.