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Publication No: IN202211045099 [India] Application No: 202211045099
Title: Method for enhancing the bearing capacity of existing structures using steel fiber reinforced grout column
Publication Date: 09-02-2024 File Date: 05-08-2022
Inventor(s): Parvathi G S ; A K Sinha ; Vasant G Havanagi
IPC Classification: E02D3/12, E04H9/02, E01B2/00, E04G23/02, E01C3/04
Abstract:
Method for enhancing the bearing capacity of existing structures using steel fiber reinforced grout column Structures can lead to  failure by excessive total or differential settlement as well as by bearing failure. Apart from these, failure can be attributed to non- uniform nature of subsoil or loading pattern, seismic activity including liquefaction, scouring of subsoil, rotational slip of embankment  and subsoil, lateral movement of subsoil due to nearby excavation etc. For structural footings, the total settlement/deformation is  limited to 75mm. Any settlement exceeding these limits will affect the serviceability of the structure. Arresting these deformations  post construction without disturbing the structure is one of the extremely difficult tasks. In the present invention a new post  construction ground improvement technique for the existing foundations using steel fiber reinforced inclined compaction grout  columns was developed. It improves the overall load bearing characteristics of foundation. This will also be beneficial for treating the  subsoil of existing structures requiring more imposed loads during the lifetime compared to the original design loads as well as the  existing structures undergoing excessive settlement or bearing failure of subsoil due to improper design or construction. This also  helps in mitigating liquefaction risks for loose alluvial deposits. Fig. 1
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