Pile is expensive but often necessary for building of large structures, bridges and high rise buildings, etc. therefore it becomes necessary to find the best pile foundation design in terms of performance and economy. In the field, during construction of pile foundation, at some particular location, length of pile is limited to certain depth then by varying parameters like increasing shaft diameter, two piles of smaller diameter, increasing bulb diameter, increasing number of bulbs will give an economical solution for same load. The optimized pile-group design corresponds to the most cost-efficient foundation solution attempting a compromise between the number of piles, their diameter and length as well as the distance between them. That’s helps in achieving the most economical design of the pile. Over the past decades, many optimization algorithms have been developed for various engineering problems, but very few attempts, however, have been made in developing an effective optimization methodology for foundation design. In this study, two different design code procedures have been considered in order to assess the performance of the designs obtained during the optimization process, namely IS: 2911 (Part I) and IS: 2911 (Part III). In this work, length of pile is reduced keeping constant load on pile coming from super structure by varying the parameters of pile, volume of earthwork and concrete has been calculated. It has been observed that even after reducing the length of pile (12 m to 9 m), for slightly higher shaft diameter (400 mm to 426 mm), pile foundation is economical.
Subjects: Computer programming; Concrete pile; Under-reamed pile; Pile group; Optimization
Author: A. K. Singh, Associate Professor, A. Kumawat, M. Tech. Student and A. Kesharwani, M. Tech. Student
Publisher: DFI