Title : EXPERIENCING THE EXTREMES OF STRUCTURAL REHABILITATION
Authors : Alok Panday
Publication : 8 - 10, October 2015
Volume : 2
Pages :
Price : 250
Abstract : Though the present days are witnessing infrastructural developments at large scale, sometimes the lack of efforts & expertise required or scarcity of time for planning, designing & construction of fast track projects is causing undesirable stresses in one or other components of the structure and/or sub-surface soil. There have been incidences where strengthening or rehabilitation is required not only in old constructions but also in new constructions during or just after the construction. The paper presents a unique case study of rehabilitation of a residential project which consisted of ten blocks of seven storied buildings and required strengthening of sub-surface soil & every component of the buildings i.e. foundations, columns, beams & slabs. The rehabilitation of various structural components and strengthening of subsurface soil was required due to the both i.e. design as well as construction deficiencies. The paper primarily discusses about the evaluation of strength of various structural components, design deficiencies, construction defects, adopted methodology of rehabilitation, structural modelling, detailing of structural components and precautions taken during execution. The major challenges faced were during and after the excavations made to strengthen the sub-surface soil and isolated (open) footings. The dampness of sub-surface soil, hollowness at foundationcolumn & plinth beam-column junctions and shifting of columns (upto about 500mm) at foundation/plinth level was unbelievable and created much more challenges than expected.