ABSTRACT
Deep excavations are becoming increasingly necessary for the construction of MRT Lines, Deep Building Basements and other facilities. Most of these facilities are constructed at densely build-up areas within the city and suburban areas. Such works would affect nearby structures and its foundations due to ground movement. Hence, it is important that the forces mobilized in the foundations are measured to ensure the safety of the foundation. In this paper, the structural behavior of reinforced concrete bored piles when subjected to lateral displacement has been studied using instrumented results from several reinforced concrete bored piles. From the results obtained, the bending moment induced in the pile has been computed directly using the vibrating wire strain gauge readings and indirectly using the deflection profile measured via inclinometers. For concrete piles, the moment of inertia of the section varies with the degree of cracking at the section. By comparing the bending moment results obtained from the direct method and indirect method, the effect of cracking and the reduction of moment of inertia with curvature have been studied and the results are presented in this paper.
