Restoration and Rehabilitation of Old Pagara Masonry Dam by Grouting Technique (A Case Study)

Pagara Masonry Dam was constructed about 94 years from now during the period 1911–1917 in the erstwhile princely state of Gwalior (M.P). After construction, it has breached/damaged and rehabilitated three times. As the dam was designed and constructed in the early part of twentieth century, hence it has been deprived of present design computation and left with many deficiencies, resulted in considerable trouble later on and required rehabilitation three times since its construction in 1917. The third rehabilitation was done in present time which has called for a rational approach of dam safety, including thorough geological investigations, treatment of foundation and body of dam, using grouting and guniting technique, stability analysis, hydraulic studies etc. The strengthening of dam using guniting, pointing and grouting has been discussed in detail along with other deficiencies in this paper.