Keller successfully delivered an optimal and sustainable foundation solution to support the proposed units-RWTP (Raw Water Treatment Plant), RO-OM (Reverse Osmosis-Demineralization Plant), and CPU (Condensate Polishing Unit)at the HCPL Rajasthan Refinery in Barmer. The foundation design was tailored to the site's geotechnical challenges, ensuring long-term stability and performance for these critical infrastructure components.
The project
M/s HPCL Rajasthan Refinery Limited (HRRL) has put forth plans to build a Raw Water Treatment Plant (RWTP), RO-DM, and CPU as a part of refinery structure. M/s Ell was the project consultant, and Mis L&T Construction Wet IC secured the construction contract. M/s L&T awarded M/s Keller to design & execute the foundation works for proposed structures.
The challenge
The proposed site was located in a low-lying area previously occupied by dead salt pans. To achieve the desired Finished Ground Level (FGL), the entire plot was raised by placing approximately 2 meters of good quality soil. The native subsoil profile consisted of silty sand at the top, followed by stiff to hard clay extending up to 20 meters below the EGL. The upper silty sand layer exhibited high salinity and was prone to collapse, presenting significant geotechnical challenges.
The solution
Leveraging its engineering and operational expertise, Mis Keller conducted a detailed analysis and implemented a dual foundation strategy. Structures with lower sensitivity to settlement were supported using open foundations on vibro stone columns, which provided effective ground improvement and load distribution. For structures requiring stringent settlement control (<= 25mm), Keller employed BCIS piles to ensure stability and performance. This resulted in overall time and cost savings for the overall project.