REHABILITATION OF OLD DAM, STRENGTHENING BY DRILLING AND GROUTING
WATER RESOURCES DEPARTMENT, GOVERNMENT OF M.P.
6 KM FROM MOHANA TOWN IN DISTRICT GWALIOR (M.P.), INDIA
This old dam was constructed in 1934 in stone masonry in lime mortar. It has 855 M long non-overflow section which has been leaking at many points on downstream face. Over the period due to ageing, lime mortar had washed away from the masonry joints leaving voids in the body of dam, causing water to seep through.
To arrest the seepage and to consolidate the masonry, average 20 M deep drilling and grouting in 2 M width by descending order method was carried out by percussive drilling through primary and secondary holes. Before grouting operations, pointing in rich cement mortar was done on u/s and D/s face of dam. The holes were drilled in two rows, 2 meter apart, with a spacing of 6 M center to center, staggered. The seepage has been controlled within permissible limit.