Proceedings of DFI-India 2018: 8th Conference on Deep Foundation Technologies for Infrastructure Development in India, (DFI)
Secant Piling Shoring System-With Circular Configuration - A Case Study
Rajan Babu C., Jibi C. Yohannan and Viswanathan N.
This paper presents a case study of a Concrete Secant Piling shoring system carried out for a Terminal Lift Pumping Station (TLPS), part of critical works at Al Madina Al Shamaliya Sewage Treatment Plant Bahrain. TLPS rectangular in footprint with diagonal measuring 33m required excavations to depths of (-) 20m. Concrete Secant Piling shoring system with circular configuration of 34.5m diameter was chosen as a suitable method of earth retaining. Concrete hard and soft piles of 900mm diameter spaced at 675mm centres were designed and installed to depths of 3m below the excavation levels of (-)20m. Advantages of the behaviour of a circular shape of the shoring system were used, where the main load paths are hoop compression. This eliminated the requirement of cross bracing and the tie-backs for load transfer. Performance of the shoring system was continuously monitored during execution for the following- 1. Integrity of concrete for full depth 2. Verticality of pile 3. Position of pile 4. Overlapping of pile between hard and soft pile 5. Cube strength of in-situ concrete
|article #3181; publication #1050 (India2018)|