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Sandip Potnis said improper shotcreting the process of spraying concrete that forms lining layers in the tunnel or delayed installation of lining supports such as steelsets or lattice girders could also lead to an instability

Sandip potnisMallika bhanotHemant dhyaniGanga avahanIndian institute of technologySupreme courtMaharashtra institute of technology world peace universityChar dhamMaharashtra instituteTechnology world peace universityIndian instituteTunnel collapseChar dham yatraState highways