It may sound incongruous, but developing a metro rail link in under developed north Chennai may be faster than in other parts, thanks to the soil condition.
Ageotechnical report released with tenders floated by CMRL for a section of the elevated stretch of the 9km phase-I extension has determined the soil from Washermenpet to Wimco Nagar is mostly silt, clay and fine sand.
More than 40 borewells were drilled and soil samples collected to a depth of 40 metres. “Excavation for an underground stretch and pile foundation for an elevated stretch can be faster if the soil is sand or clay,“ said an official. “The type of soil is crucial in deciding the depth of the foundation for the elevated stretch when calling for tenders.“
The report was submitted to France-based Systra MVA Consulting, involved in design and alignment of the `3,770-crore WashermenpetWimco Nagar project with eight stations, including two on a 2km underground stretch. Boring underground tunnels is on since July . In fact, Russian firm Mosmetrostroy abandoned work along Anna Salai, claiming there was a change in alignment and that the rocky stretch was hard to break with the available equipment.
dinathanthi newspaper 09/11/2016 : http://www.dinathanthiepaper.in/firstpage.aspx