In any project, constructing on a weak subgrade is always a challenge. In this project, our client was confronted with a similar problem at their proposed container terminal in Kolkata, one of the four metro cities.

Container yards typically have two major issues that impact construction and maintenance: A) Heavy pressures from container stacks, B) Non-uniform settlements of the ground.

The Strata solution eliminates the concrete layer altogether. The system incorporates StrataWeb® within the paving to reduce the bearing pressures onto the subsoil. This provides a leaner pavement design. StrataWeb® along with infilling, also addresses the differential settlement issues, providing an even working ground.

The analysis demonstrated that imposed pressures with a section reinforced with StrataWeb® SW 356-150 are well within the safe bearing capacity of the subgrade. The design included two layers of StrataWeb® to bear the load spread. The StrataWeb® was infilled and topped with 10 mm of down-graded gravel. StrataBase was included to strengthen the section further and improve the performance.

Strata’s solution saved 15% of the cost compared to the conventional solution and helped in timely completion because of the ease of StrataWeb® transportation and the use of locally available and cheaper material.