OMR-ECR linking in Chennai - Whats going on now!!
Posted on: 05/Aug/2021 9:11:49 AM
The wet and marshy soil with water table of just 0.3m from the existing ground level is an issue now on the proposed construction link road along with a bridge over Buckingham Canal to link OMR and ECR in Chennai. The highways department would be doing ground improvement work now.
It is brought out that the highways department would take up the improvement work by using prefabricated vertical drain in the main work of forming link road and in the bridge construction.
As per some officers belonging to the highways department, the soft ground had created issues during the ground preparation for road construction. The subsoil condition was found to be soft when the ground was dug further by excavator. Truth is that loose watery clay mixed with sand was an issue and the department decided to get proper soil investigation before embankment formation.
Help from the Geotechnical division belonging to AU or the Anna University was sought after and the necessity of soil stabilisation has been confirmed by the reports. The officials later threw light on how due to the prevailing soil conditions at the site the suitable ground methods recommended by AU were removal and replacement of soil, preloading with vertical drains and stone column installation. Truth is that preloading with vertical drains is cost effective plus suitable for existing site conditions. It is learnt that the second opinion was also got from the Geo-Technical Engineering Division of IIT Madras.
Later, an official spoke about how bids have been invited for the ground improvement using prefabricated vertical drain.
