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6: Coupled TDA–Geocell Stress-Bridging System
"Frequent failures of buried water supply pipelines have been reported along the Thonniyakavu–Kottuvally stretch in North Paravur, Ernakulam, Kerala. These failures are primarily due to repetitive traffic loads and inadequate soil support. The recurring failures have led to service disruptions and high maintenance costs, necessitating a sustainable geotechnical solution. While pipeline replacement is often considered, improving soil stability around buried pipes can offer a more long-term and cost-effective approach. This study explores the application of Tire Derived Aggregate (TDA) and geocell reinforcement as an alternative backfill system to reduce earth pressures, control settlement, and enhance pipeline stability. TDA, with its lightweight and compressible properties, aids in absorbing surface loads, while geocells provide lateral confinement, improving overall soil performance. A numerical analysis using PLAXIS 3D software is conducted to simulate site conditions and evaluate the effects of TDA and geocells on stress distribution, deformation, and load-bearing capacity. Various configurations are analyzed to determine their effectiveness in mitigating pipeline failures. The findings of this study will provide insights into a sustainable and economical reinforcement strategy, potentially guiding infrastructure improvements in traffic-prone regions like Kottuvally Panchayat. By optimizing backfill materials, this research aims to enhance pipeline longevity, reduce maintenance needs, and ensure a more resilient water supply network in North Paravur, Ernakulam, Kerala."
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