5 months ago
1
The National Highways Authority of India (NHAI) has launched a large-scale geotechnical probe crossed the full NH-66 enlargement task successful Kerala pursuing the caller illness of a reinforced ungraded (RS) partition astatine Mylakkadu successful Kollam.
In bid to code concerns implicit structural integrity, the NHAI has employed 18 geotechnical agencies to execute rigorous ungraded sampling and investigating astatine a full of 378 RS partition locations crossed 18 antithetic road projects successful Kerala. This broad audit volition screen sites that are already constructed, presently successful progress, and those yet to begin.
The appointed agencies are required to deploy aggregate drilling rigs wrong the adjacent 7 to 10 days, with the extremity of completing tests astatine 100 locations wrong the archetypal period and finalising the full appraisal wrong a three-month clip frame, aiming to rapidly ascertain the information and stableness of each reinforced ungraded structures on the corridor.
The illness of the RS partition astatine Mylakkadu, which was portion of the attack operation to a vehicular underpass connected the Kollam–Kadambattukonam NH-66 project, is linked to a cardinal geotechnical problem. Preliminary assessments of the NHAI bespeak the illness of the 9.4-metre-high partition was owed to a deep-seated shear oregon bearing capableness failure. Essentially, the ungraded beneath the instauration was critically anemic and incapable to enactment the dense load imposed by the RS partition and the monolithic world capable down it.
Expert team
Following the nonaccomplishment astatine Mylakkadu, a high-level adept committee was sent to the tract connected December 6 to analyse the causes and urge corrective measures. This squad included Jimmy Thomas (IIT-Kanpur) and T.K. Sudheesh (IIT-Palakkad) and according to the NHAI, the findings of a erstwhile adept committee, constituted aft the Kooriyad embankment illness successful Malappuram, are already being acted upon.
In airy of a abstracted incidental successful November (the falling of girders connected the Aroor-Thuravoor elevated roadworthy project) the NHAI had already engaged RITES to behaviour a targeted information audit connected that circumstantial stretch. This information audit is present being expanded to screen each different NH-66 projects, aiming to place and rectify immoderate imaginable information concerns crossed the full corridor.
The NHAI has affirmed that assorted tract and laboratory reports generated aft due investigations volition service arsenic the ground for re-checking the plan and operation of each azygous RS wall. Remedial measures, including the imaginable dismantling and implicit reconstruction of walls, volition beryllium mandated wherever necessary. The NHAI has stated that nary RS partition volition beryllium accepted until this stringent reappraisal process is implicit and prime standards are afloat confirmed.
