The city of Mumbai, India with its teeming millions of inhabitants began experiencing frequent failures of it storm sewer system in 2010. Sections of the one hundred year old system had begun to collapse. Bursting sewer pipes led to washouts and cave-ins which created havoc during peak street traffic hours.
In 2012, Shotcrete Technologies, Inc. was contacted by Michigan Engineers Ltd. of Mumbai, India to provide technical expertise, equipment and training to rehabilitate the aging storm sewer system. The variety of pipe shapes and sizes and challenging site locations called for a versatile application method that was cost-effective, simple to operate, mobile and relatively fool-proof.
The solution was to pump and spray specially prepared concrete known as shotcrete into and around weakened areas of the sewer system. To meet the needs of the client, Shotcrete Technologies, Inc. provided three Shot-Tech Robotic Arms and one Robotic Shotlining system. The proven robotic systems are based on BIGMAX TC350 cranes especially adapted by Shotcrete Technologies for this demanding application. Pumps were chosen to deliver shotcrete material through two inch hoses. The robotic arms were all mounted on wheeled carriers especially designed to operate in low overhead and confined conditions.
As anticipated, the Shot-Tech Robotic arms and System are proving their versatility and productivity in extremely challenging conditions.