DEEP EXCAVATIONS IN BUILT UP AREAS AND PILING TECHNIQUES

Abstract

For deep excavations, a retention system is mandatory not only for the safety of surrounding structures, but also for safe and proper execution of construction work within the parameter. This document serves as a comprehensive evaluation and comparison of design procedures available for retention systems comprising of piles and anchors. The design procedure consists of two components to be worked out separately, the piles, and the anchorage system. The approaches of FHWA and Canadian manual have been used as a major reference to evaluate the design procedures, and hence to draw a comparison between the methods available. Detailed procedure is discussed for design method of anchors, and different methods for piles, including ; Brom’s, Wange & Reese’s, Brinch Hansen’s, Evans & Duncan’s and Reese & Matlock’s method. To demonstrate the design, a case study has been discussed. The comparison has been made on the basis of results obtained by the application different methods on the case study. In addition to the design considerations and procedures, general detail has also been discussed to highlight the necessity of retention systems and the key theory of excavation procedures and types of pile.